Handheld negative pressure device

Abstract

The handheld negative pressure device comprises a handheld part, a heating element, a negative pressure pump and a pressure release valve, the handheld part is provided with an assembly cavity and a negative pressure cavity with an opening facing the direction, and the heating element, the negative pressure pump and the pressure release valve are arranged on the handheld part respectively. The heating element is arranged to enable the negative pressure cavity of the handheld part to form a thermal environment, the negative pressure pump is arranged to enable the negative pressure cavity of the handheld part to form a negative pressure environment, and the pressure release valve is arranged on the handheld part and is arranged to enable the negative pressure cavity of the handheld part to release pressure.

Description

Handheld negative pressure device Technical Field

[0001] This utility model relates to a negative pressure device, and more particularly to a handheld negative pressure device, which is used to assist in the manufacture of a Doppler underwater measuring instrument. Background Technology

[0002] In Chinese invention patent application CN118357133A, the inventors disclosed a method for manufacturing a Doppler underwater measuring device. This method utilizes manufacturing equipment to produce the Doppler underwater measuring device. During the manufacturing process, adhesive is first applied to a mounting groove in the main body of the casing. Then, a Doppler transducer is installed in the mounting groove, and the casing and the Doppler transducer are bonded together with adhesive to obtain a semi-finished measuring instrument. Next, the semi-finished measuring instrument is placed in the manufacturing equipment, which generates a negative pressure and thermal environment around it. During the curing process of the adhesive, air bubbles inside are automatically expelled, significantly reducing the air bubble content in the bonded area after adhesive curing and thus improving the measurement accuracy of the Doppler underwater measuring device in its application scenarios. Existing manufacturing equipment is complex in structure, costly, and bulky, suitable only for mass production of Doppler underwater measuring devices in factories, and not for laboratories or maintenance sites. The present invention aims to develop a compact handheld negative pressure device that can be used in the glue curing process of Doppler underwater measurement devices in laboratories and repair sites, and provides functions similar to those of manufacturing equipment. Summary of the Invention

[0003] One objective of this invention is to provide a handheld negative pressure device, wherein the handheld negative pressure device is used to assist in the manufacture of a Doppler underwater measuring instrument.

[0004] One objective of this invention is to provide a handheld negative pressure device, which is particularly suitable for the adhesive curing process during the development, trial production, and maintenance phases of the Doppler underwater measuring instrument.

[0005] One objective of this invention is to provide a handheld negative pressure device, wherein the handheld part of the handheld negative pressure device covers the glued portion of the semi-finished measuring instrument, such that the glued portion of the semi-finished measuring instrument is located within the negative pressure chamber of the handheld part. When a thermal and negative pressure environment is formed within the negative pressure chamber of the handheld part, during the process of the glue curing to form an adhesive portion, tiny air bubbles in the glue can be automatically discharged, thereby significantly reducing the air bubble content of the adhesive portion and improving the measurement accuracy of the Doppler underwater measuring device in the application scenario.

[0006] One objective of this invention is to provide a handheld negative pressure device, wherein the flexible gasket of the handheld negative pressure device can seal the negative pressure chamber to prevent air leakage from the negative pressure chamber, thereby facilitating the formation of a negative pressure environment in the negative pressure chamber.

[0007] According to one aspect of this utility model, this utility model provides a handheld negative pressure device, which includes:

[0008] A handheld part, wherein the handheld part has an assembly cavity and an opening facing a negative pressure cavity;

[0009] A heating element, wherein the heating element is disposed in the handheld portion, and the heating element is configured to create a thermal environment in the negative pressure chamber of the handheld portion;

[0010] A negative pressure pump, wherein the negative pressure pump is disposed in the assembly cavity of the handheld part, and the negative pressure pump is configured to create a negative pressure environment in the negative pressure cavity of the handheld part; and

[0011] A pressure relief valve, wherein the pressure relief valve is disposed on the handgrip and is configured to relieve pressure in the negative pressure chamber of the handgrip.

[0012] According to one embodiment of the present invention, the handheld part includes a handheld housing and a negative pressure housing, the negative pressure housing is installed on the handheld housing, the handheld part forms the assembly cavity between the handheld housing and the negative pressure housing, the negative pressure cavity of the handheld part is formed in the negative pressure housing, and the heating element is disposed in the negative pressure housing.

[0013] According to one embodiment of the present invention, a portion of the heating element is located in the negative pressure chamber of the handheld part.

[0014] According to one embodiment of the present invention, the handheld housing has a cavity and an opening communicating with the cavity, and the rear part of the negative pressure housing extends into the cavity through the opening of the handheld housing and surrounds the negative pressure housing.

[0015] According to one embodiment of the present invention, the opening of the negative pressure housing has a circumferentially extending abutment ring, the outer diameter of the abutment ring being larger than the inner diameter of the cavity of the handheld housing, and the abutment ring of the negative pressure housing abutting against the edge of the cavity of the handheld housing.

[0016] According to one embodiment of the present invention, the handheld negative pressure device includes a flexible washer disposed on the abutment ring of the negative pressure housing, and the flexible washer protrudes from the end face of the opening of the negative pressure housing.

[0017] According to one embodiment of the present invention, the collapsing ring of the negative pressure housing has an annular groove, and the flexible gasket has an annular protrusion, wherein the annular protrusion of the flexible gasket is engaged in the annular groove of the collapsing ring.

[0018] According to one embodiment of the present invention, the collapsing ring of the negative pressure housing has an annular locking protrusion, and the flexible gasket has an annular locking groove, wherein the annular locking protrusion of the collapsing ring is engaged with the annular locking groove of the flexible gasket.

[0019] According to one embodiment of the present invention, the flexible washer is installed on the abutment ring of the negative pressure housing to set the flexible washer on the abutment ring of the negative pressure housing.

[0020] According to one embodiment of the present invention, the flexible washer is integrally formed on the abutment ring of the negative pressure housing, so as to provide the flexible washer on the abutment ring of the negative pressure housing. Attached Figure Description

[0021] Figure 1 is a perspective view of a handheld negative pressure device according to a preferred embodiment of the present invention.

[0022] Figure 2 is a perspective view of the handheld negative pressure device according to the above-described preferred embodiment of the present invention.

[0023] Figure 3 is an exploded view of the handheld negative pressure device according to the above-described preferred embodiment of the present invention.

[0024] Figure 4 is an exploded view of the handheld negative pressure device according to the above-described preferred embodiment of the present invention from another perspective.

[0025] Figure 5 is a cross-sectional schematic diagram of the handheld negative pressure device according to the above-described preferred embodiment of the present invention.

[0026] Figure 6 is a schematic diagram of one of the processes of manufacturing a Doppler underwater measuring device using the handheld negative pressure device of the above-described preferred embodiment of the present invention.

[0027] Figure 7 is a schematic diagram of a second process of manufacturing the Doppler underwater measuring device using the handheld negative pressure device of the above-described preferred embodiment of the present invention.

[0028] Figure 8 is a schematic diagram of the third process of manufacturing the Doppler underwater measuring device using the handheld negative pressure device of the above-described preferred embodiment of the present invention.

[0029] Figure 9 is a schematic diagram of the fourth process of manufacturing the Doppler underwater measuring device using the handheld negative pressure device of the above-described preferred embodiment of the present invention.

[0030] Figure 10 is a schematic diagram of the fifth process of manufacturing the Doppler underwater measuring device using the handheld negative pressure device of the above-described preferred embodiment of the present invention.

[0031] Figure 11 is a schematic diagram of the sixth process of manufacturing the Doppler underwater measuring device using the handheld negative pressure device of the above-described preferred embodiment of the present invention.

[0032] Figure 12 is a schematic diagram of the seventh process of manufacturing the Doppler underwater measuring device using the handheld negative pressure device of the above-described preferred embodiment of the present invention.

[0033] Figure 13 is a schematic diagram of the eighth step in manufacturing the Doppler underwater measuring device using the handheld negative pressure device of the above-described preferred embodiment of the present invention.

[0034] Figure 14 is a schematic diagram of the ninth process of manufacturing the Doppler underwater measuring device using the handheld negative pressure device of the above-described preferred embodiment of the present invention.

[0035] Figure 15 is a schematic diagram of the process of manufacturing the Doppler underwater measuring device using the handheld negative pressure device of the above-described preferred embodiment of the present invention. Detailed Implementation

[0036] Before detailing any embodiment of the invention, it should be understood that the invention, in its application, is not limited to the details of the construction and arrangement of the components set forth in the following description or illustrated in the following figures. The invention can have other embodiments and can be practiced or carried out in various ways. Furthermore, it should be understood that the wording and terminology used herein are for descriptive purposes and should not be considered limiting. The use of “comprising” or “having” and variations thereof is intended to cover the items set forth below and their equivalents, as well as any additional items. Unless otherwise specified or limited, the terms “installation,” “connection,” “support,” and “linkage,” and variations thereof are used broadly and cover both direct and indirect installation, connection, support, and linking. Moreover, “connection” and “linkage” are not limited to physical or mechanical connections or links.

[0037] Furthermore, firstly, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention. Secondly, the term "a" should be understood as "at least one" or "one or more," that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be construed as a limitation on the quantity.

[0038] Referring to Figures 1 to 15 of the accompanying drawings of this invention, a handheld negative pressure device 100 according to a preferred embodiment of the invention will be disclosed and described in the following description. The handheld negative pressure device 100 is configured to manufacture a Doppler underwater measuring device 200.

[0039] The Doppler underwater measuring device 200 includes a housing body 210, a plurality of Doppler transducers 220, a plurality of adhesive portions 230, a measuring instrument circuit board 240, a bottom cover 250, and a watertight cable 260. The housing body 210 has a housing space 2101 and a plurality of mounting slots 2102 and a watertight perforation 2104 respectively communicating with the housing space 2101. Each of the Doppler transducers 220 is respectively mounted in the respective mounting slots 2102 of the housing body 210. Each of the adhesive portions 230 is formed by curing the adhesive applied to the respective mounting slots 2102 of the housing body 210, thus the adhesive portions 230 are used to bond the housing body 210 and the measuring instrument circuit board 240. The Doppler transducer 220 is described, which integrates the housing body 210, the Doppler transducer 220, and the adhesive portion 230 into a single unit. The measuring instrument circuit board 240 is disposed in the housing space 2101 of the housing body 210, and each of the Doppler transducers 220 is connected to the measuring instrument circuit board 240. The bottom cover 250 is installed on the housing body 210 and closes the opening of the housing space 2101 of the housing body 210. One end of the watertight cable 60 extends through the watertight perforation 2104 of the housing body 210 to the housing space 2101, and this end of the watertight cable 60 is connected to the measuring instrument circuit board 240.

[0040] During the manufacturing process of the Doppler underwater measuring device 200, the handheld negative pressure device 100 is used for the curing of the adhesive applied to the mounting groove 2102 of the shell body 210, so that the adhesive forms the adhesive part 230 after curing. The handheld negative pressure device 100 includes a handheld part 10, a heating element 20, a negative pressure pump 30, and a pressure relief valve 40.

[0041] Specifically, the handheld part 10 has an assembly cavity 101 and a downward-facing negative pressure cavity 102. A heating element 20 is disposed in the handheld part 10, and when powered, the heating element 20 creates a thermal environment in the negative pressure cavity 102. A negative pressure pump 30 is disposed in the assembly cavity 101, and when powered, it creates a negative pressure environment in the negative pressure cavity 102. A pressure relief valve 40 is disposed in the handheld part 10, and it releases pressure from the negative pressure cavity 102, restoring it to normal pressure. In other words, the heating element 20 and the negative pressure pump 30 work together to create a thermal negative pressure environment in the negative pressure cavity 102 of the handheld part 10.

[0042] During the manufacturing process of the Doppler underwater measuring device 200, after the Doppler transducer 220 is installed in the mounting groove 2102 of the housing body 210 and the mounting groove 2102 of the housing body 210 is coated with adhesive, the handheld part 10 covers the mounting groove 2102 of the housing body 210 and the Doppler transducer 220. At this time, the adhesive applied to the mounting groove 2102 of the housing body 210 and the Doppler transducer 220 are located in the negative pressure chamber 102 of the handheld part 10. Then, power is supplied to the heating element 20 and the negative pressure pump 30 respectively, so that the handheld part... The negative pressure chamber 102 of part 10 forms a thermal negative pressure environment. During the curing process of the adhesive, the tiny air bubbles in the adhesive can be automatically discharged to reduce the air bubble content in the adhesive. As a result, after the adhesive cures to form the bonded part 230, the air bubble content in the bonded part 230 can be significantly reduced, which is beneficial to improving the measurement accuracy of the Doppler underwater measuring device 200 in the usage scenario. Subsequently, the pressure relief valve 40 is used to depressurize the negative pressure chamber 102 of the handheld part 10, so that the negative pressure chamber 102 of the handheld part 10 returns to normal pressure, which facilitates the separation of the handheld part 10 and the shell body 210.

[0043] Furthermore, the handheld portion 10 includes a handheld housing 11 and a negative pressure housing 12. The negative pressure housing 12 is mounted on the handheld housing 11. The handheld portion 10 forms the assembly cavity 101 between the handheld housing 11 and the negative pressure housing 12. The negative pressure cavity 102 of the handheld portion 10 is formed in the negative pressure housing 12. In this way, not only can the handheld portion 10 form the assembly cavity 101 and the negative pressure cavity 102, but it is also convenient to install the negative pressure pump 30 in the assembly cavity 101 of the handheld portion 10. In addition, since the negative pressure cavity 102 of the handheld portion 10 is formed separately by the negative pressure housing 12, it is beneficial to ensure the sealing of the negative pressure cavity 102 of the handheld portion 10, which facilitates the subsequent formation and maintenance of the negative pressure environment of the negative pressure cavity 102 of the handheld portion 10.

[0044] The heating element 20 is disposed in the negative pressure housing 12, so that the heat generated by the heating element 20 when powered can directly raise the temperature of the negative pressure chamber 102 of the handheld part 10, thereby creating a thermal environment in the negative pressure chamber 102 of the handheld part 10. Preferably, a portion of the heating element 20 is located inside the negative pressure chamber 102 of the handheld part 10, which facilitates the rapid raising of the temperature inside the negative pressure chamber 102 of the handheld part 10.

[0045] It is worth mentioning that the mounting method of the handheld housing 11 and the negative pressure housing 12 is not limited in the handheld negative pressure device 100 of this utility model. For example, in this specific example of the handheld negative pressure device 100 of this utility model shown in Figures 1 to 15, the handheld housing 11 has a cavity 111 and an opening 112 communicating with the cavity 111. The rear part of the negative pressure housing 12 extends into the cavity 111 through the opening 112 of the handheld housing 11, so that the handheld housing 11 surrounds the negative pressure housing 12. In this way, not only can the negative pressure housing 12 be reliably mounted on the handheld housing 11, but it also helps to reduce the overall height of the handheld part 10, thereby miniaturizing the handheld negative pressure device 100. After the rear portion of the negative pressure housing 12 extends into the cavity 111 of the handheld housing 11 through the opening 112, adhesive can be used to bond the handheld housing 11 and the negative pressure housing 12, so that the handheld housing 11 and the negative pressure housing 12 are reliably installed. Alternatively, screws can also be used to lock the handheld housing 11 and the negative pressure housing 12, so that the handheld housing 11 and the negative pressure housing 12 are reliably installed.

[0046] Preferably, the opening of the negative pressure housing 12 has a surrounding overlapping ring 121. The outer diameter of the overlapping ring 121 is larger than the inner diameter of the cavity 112 of the handheld housing 11. Thus, after the rear part of the negative pressure housing 12 extends into the cavity 111 of the handheld housing 11 through the cavity 112, the overlapping ring 121 rests against the edge of the cavity 112 of the handheld housing 11, limiting the depth of the negative pressure housing 12 into the handheld housing 11 and preventing the entire negative pressure housing 12 from falling into the cavity 111 of the handheld housing 11. A screw can be used to lock the negative pressure housing 12 and the handheld housing 11 at the position of the overlapping ring 121. More preferably, the outer diameter of the main body of the negative pressure housing 12 is the same as the inner diameter of the portion of the cavity 111 of the handheld housing 11 adjacent to the cavity 112. In this way, the handheld negative pressure device 100 can avoid the negative pressure housing 12 from shaking relative to the handheld housing 11, so as to ensure the reliability and stability of the handheld negative pressure device 100.

[0047] Furthermore, the handheld negative pressure device 100 includes a flexible washer 50, which is disposed on the abutment ring 121 of the negative pressure housing 12 and protrudes from the end face of the negative pressure housing 12. When the negative pressure housing 12 of the handheld part 10 covers the mounting groove 2102 of the shell body 210 and the Doppler transducer 220, the flexible washer 50 can prevent the formation of a gap between the assembly surface 2103 of the handheld negative pressure device 100 and the shell body 210 by slight deformation. This helps to ensure the formation and maintenance of the negative pressure chamber 102 of the handheld negative pressure device 100, which is crucial for effectively reducing the air bubble content of the adhesive part 230.

[0048] It is worth mentioning that the material of the flexible gasket 50 is not limited in the handheld negative pressure device 100 of the present invention. For example, the flexible gasket 50 can be a rubber ring or a silicone ring, as long as it can be slightly deformed to prevent the formation of a gap between the handheld negative pressure device 100 and the shell body 210.

[0049] Additionally, it is understood that after the flexible washer 50 is placed on the abutment ring 121 of the negative pressure housing 12, the flexible washer 50 can cover the screw used to lock the negative pressure housing 12 and the handheld housing 11, which not only makes the screw visually invisible, but also prevents the screw from affecting the sealing effect between the handheld negative pressure device 100 and the housing body 210.

[0050] In a specific example of the handheld negative pressure device 100 of the present invention, the flexible washer 50 may be disposed on the abutment ring 121 of the negative pressure housing 12 by first prefabricating the flexible washer 50, and then installing the flexible washer 50 on the abutment ring 121 of the negative pressure housing 12. It is understood that the step of installing the flexible washer 50 on the abutment ring 121 of the negative pressure housing 12 can be performed after the step of installing the negative pressure housing 12 onto the handheld housing 11, so that the flexible washer 50 can block the screws used to lock the negative pressure housing 12 and the handheld housing 11. Optionally, in another specific example of the handheld negative pressure device 100 of the present invention, the flexible gasket 50 is integrally formed on the abutment ring 121 of the negative pressure housing 12. To set the flexible gasket 50 on the abutment ring 121 of the negative pressure housing 12, the specific steps may be as follows: after placing the abutment ring 121 of the negative pressure housing 12 into a mold, injecting a fluid silicone or rubber material into the mold, so that the fluid silicone or rubber material can wrap at least a portion of the abutment ring 121, and after the fluid silicone or rubber material is cured, the flexible gasket 50 is integrally formed on the abutment ring 121.

[0051] Furthermore, in this specific example of the handheld negative pressure device 100 of the present invention, referring to Figure 5, the abutment ring 121 of the negative pressure housing 12 has an annular groove 1211, and the flexible washer 50 has an annular protrusion 51. After the flexible washer 50 is fitted onto the abutment ring 121 of the negative pressure housing 12, the annular protrusion 51 of the flexible washer 50 engages with the annular groove 1211 of the abutment ring 121. With this structure, the flexible washer 50 can be reliably positioned on the abutment ring 121, preventing the flexible washer 50 from falling off the abutment ring 121. Optionally, in another specific example of the handheld negative pressure device 100 of the present invention, the annular groove 1211 can be formed on the flexible washer 50, and correspondingly, the annular protrusion 51 can be formed on the abutment ring 121 of the negative pressure housing 12. The annular protrusion 51 of the abutment ring 121 engages with the annular groove 1211 of the flexible washer 50. In this way, the flexible washer 50 can be reliably disposed on the abutment ring 121, preventing the flexible washer 50 from falling off the abutment ring 121.

[0052] Furthermore, the negative pressure housing 12 has a housing perforation 122, which communicates with the negative pressure cavity 102 of the handheld part 10. The heating element 20 includes an element base 21 and a heating part 22 disposed at the bottom of the element base 21. The heating part 22 has a pair of first terminals 221 at the top of the element base 21. The element base 21 is installed in the housing perforation 122 of the negative pressure housing 12, suspending the heating part 22 within the negative pressure housing 12 by the element base 21; that is, the heating part 22 is suspended in the negative pressure cavity 102 of the handheld part 10. It is understood that since the heating part 22 has a pair of first terminals 221 at the top of the element base 21, the pair of first terminals 221 are located in the assembly cavity 101 of the handheld part 10.

[0053] It is worth mentioning that the specific method of installing the component seat 21 into the housing through hole 122 of the negative pressure housing 12 is not limited in the handheld negative pressure device 100 of this utility model. For example, in a specific example of the handheld negative pressure device 100 of this utility model, after one end of the component seat 21 is inserted into the housing through hole 122 of the negative pressure housing 12, glue can be used to bond the component seat 21 and the negative pressure housing 12, or screws can be used to lock the component seat 21 and the negative pressure housing 12.

[0054] Preferably, the housing perforation 122 of the negative pressure housing 12 is formed in the middle of the negative pressure housing 12, that is, the housing perforation 122 is the central perforation of the negative pressure housing 12. In this way, the heating part 22 can be moved away from the negative pressure housing 12, so that the temperature of the handheld part 10 can be easily controlled in a low range during the use of the handheld negative pressure device 100, and the handheld part 10 can be kept from getting too hot.

[0055] It is worth mentioning that the specific type of the negative pressure pump 30 is not limited in the handheld negative pressure device 100 of this utility model. It can be a diaphragm negative pressure pump or a piston negative pressure pump. The negative pressure pump 30 includes a motor 31 and a pump body 32 connected to the motor 31. The motor 31 has a pair of second terminals 311. The pump body 32 has a first air passage 321 and a second air passage 322. The first air passage 321 communicates with the assembly cavity 101 of the handheld part 10, and the second air passage 322 communicates with the negative pressure cavity 102 of the handheld part 10. Preferably, the negative pressure housing 12 has an air passage 123 that communicates with the negative pressure chamber 102. The second air passage 322 of the pump body 32 extends from the assembly cavity 101 of the handheld part 10 to the negative pressure chamber 102 via the air passage 123 of the negative pressure housing 12, thereby communicating with the negative pressure chamber 102 of the handheld part 10. Preferably, the shape and size of the air passage 123 of the negative pressure housing 12 match the shape and size of the second air passage 322 of the pump body 32. This prevents gaps between the second air passage 322 of the pump body 32 and the negative pressure housing 12 after the second air passage 322 of the pump body 32 extends from the assembly cavity 101 of the handheld part 10 to the negative pressure chamber 102 via the air passage 123 of the negative pressure housing 12, thus preventing air leakage from the negative pressure chamber 102 of the handheld part 10.

[0056] In order to reliably house the negative pressure pump 30 in the assembly cavity 101 of the handheld part 10, in this specific example of the handheld negative pressure device 100 of the present invention, referring to Figures 3 to 5, the handheld negative pressure device 100 further includes a bracket 60, the negative pressure pump 30 is mounted on the bracket 60, and the bracket 60 is mounted on the handheld housing 11 of the handheld part 10, so that the negative pressure pump 30 is mounted in the assembly cavity 101 of the handheld part 10 by the bracket 60. Specifically, the bracket 60 includes a bottom ring 61, a top ring 62, and at least one connecting arm 63 extending between the bottom ring 61 and the top ring 62. The bottom ring 61 is fitted into the middle of the negative pressure pump 30, and the negative pressure pump 30 is fixedly mounted on the bottom ring 61. For example, a set of screws can be used to lock the negative pressure pump 30 to the bottom ring 61, so that the negative pressure pump 30 is fixedly mounted on the bottom ring 61. The top ring 62 is fixedly mounted on the handheld housing 11 of the handheld part 10. For example, a set of screws can be used to lock the top ring 62 to the handheld housing 11, so that the top ring 62 is fixedly mounted on the handheld housing 11. Thus, the bracket 60 can reliably mount the negative pressure pump 30 in the assembly cavity 101 of the handheld part 10. Preferably, the bracket 60 has a plurality of connecting arms 63, which are arranged at intervals from each other.

[0057] More specifically, the handheld housing 11 of the handheld part 10 includes a bottom shell 113 and a top shell 114. The top of the bottom shell 113 and the bottom of the top shell 114 can be mounted to each other to form a cavity 111 of the handheld housing 11 between the bottom shell 113 and the top shell 114. The cavity opening 112 of the handheld housing 11 is formed in the bottom shell 113, wherein the negative pressure housing 12 is mounted in the bottom shell 113. The outer diameter of the bottom ring 61 and the outer diameter of the top ring 62 of the bracket 60 are the same as the inner diameter of the top shell 114. After the bracket 60 is inserted into the top shell 114, the outer walls of the bottom ring 61 and the top ring 62 are both in contact with the inner wall of the top shell 114 to prevent the bracket 60 from shaking inside the top shell 114.

[0058] The specific process of installing the negative pressure pump 30 onto the handheld housing 11 via the bracket 60 can be as follows: First, after the bottom ring 61 of the bracket 60 is fitted onto the middle of the negative pressure pump 30, the negative pressure pump 30 is locked to the bottom ring 61 by a set of screws, so that the bracket 60 and the negative pressure pump 30 are combined into a whole; second, after inserting the bracket 60 into the top shell cylinder 114, the top ring 62 is locked onto the top shell cylinder 114 by a set of screws. At this time, the outer walls of the bottom ring 61 and the top ring 62 are both in contact with the inner wall of the top shell cylinder 114; then, the top of the bottom shell cylinder 113 is installed onto the bottom of the top shell cylinder 114. Thus, the bracket 60 is used to install the negative pressure pump 30 onto the handheld housing 11, and both the bracket 60 and the negative pressure pump 30 are located in the cavity 111 of the handheld housing 11.

[0059] In addition, the top shell cylinder 114 has a vent hole 1141, which is connected to the assembly cavity 101 of the handheld part 10 to allow air from the external environment to exchange with the air in the assembly cavity 101 of the handheld part 10.

[0060] Referring again to Figures 1 to 5, the handheld negative pressure device 100 further includes a circuit board 70, a switch 80, and a cable 90. The circuit board 70 is mounted on the bracket 60, which holds the circuit board 70 in the assembly cavity 101 of the handheld part 10. The switch 80 is operably mounted on the top shell 114, which has a wire hole 1142. One end of the cable 90 extends through the wire hole 1142 of the top shell 114 to the assembly cavity 101 of the handheld part 10. The switch 80, this end of the cable 90, the first terminal 221 of the heating part 22, and the second terminal 311 of the motor 31 are all connected to the circuit board 70. The other end of the cable 90 can be connected to mains power. When the switch 80 is pressed, the circuit board 70 allows electrical energy to be supplied to the heating part 22 and the motor 31 respectively, so that the negative pressure chamber 102 of the handheld part 10 can form a thermal negative pressure environment. When the switch 80 is released, the circuit board 70 prevents electrical energy from being supplied to the heating part 22 and the motor 31, at which time the heating part 22 and the motor 31 stop working.

[0061] Figures 6 to 15 illustrate the manufacturing process of the Doppler underwater measuring device 200.

[0062] Referring to Figure 6, the shell body 210 is disposed on a top support element 310 of a manufacturing device 300. The portion of the top support element 310 used to support the shell body 210 extends into the shell space 2101 of the shell body 210. Since the shape and size of the portion of the top support element 310 used to support the shell body 210 match the shape and size of the shell space 2101 of the shell body 210, the shell body 210 is protected from swaying relative to the top support element 310 when supported by the top support element 310. It should be noted that in this invention, the manufacturing device 300 used to assist in the manufacture of the Doppler underwater measuring device 200 has the same basic structure as the manufacturing device disclosed in application number CN202310392114.4. The only difference is that the manufacturing device 300 involved in this invention does not require a heat source and temperature acquisition unit. Therefore, the specific structure of the manufacturing device 300 will not be described in detail in this invention.

[0063] Referring to Figure 7, a Doppler transducer 220 is installed in a mounting slot 2102 of the housing body 210, and the mounting surface 2103 of the mounting slot 2102 adjacent to the housing body 210 is adjusted to a horizontal state by driving the housing body 210 to rotate relative to the top support element 310. It is understood that a spirit level can be used to adjust the horizontal state of the mounting surface 2103 of the housing body 210. In this invention, the height dimension of the Doppler transducer 220 is smaller than the depth dimension of the mounting slot 2102 of the housing body 210, so that after the Doppler transducer 220 is installed in the mounting slot 2102 of the housing body 210, there is a height difference between the top surface of the Doppler transducer 220 and the mounting surface 2103 of the housing body 210.

[0064] Referring to Figure 8, adhesive is injected into the gap between the housing body 210 and the Doppler transducer 220. The adhesive will automatically fill this gap and cover the top surface of the Doppler transducer 20. In this invention, the injection process can be achieved using a dispensing device.

[0065] Referring to Figure 9, the operator holds the handheld negative pressure device 100 and covers the mounting groove 2102 of the housing body 210 and the Doppler transducer 220 with the handheld part 10. At this time, the adhesive applied to the gap between the housing body 210 and the Doppler transducer 220 and the Doppler transducer 220 are located in the negative pressure chamber 102 of the handheld part 10. The flexible gasket 50 is attached to the mounting surface 2103 of the housing body 210 and is used to prevent the formation of a gap between the handheld negative pressure device 100 and the housing body 210 by slight deformation.

[0066] Referring to Figure 10, when the operator presses the switch 80, electrical energy is supplied to the heating part 22 of the heating element 20 and the motor 31 of the negative pressure pump 30, creating a thermal negative pressure environment in the negative pressure chamber 102 of the handheld part 10. The adhesive cures during the heating process, and tiny air bubbles in the adhesive are automatically expelled. This significantly reduces the air bubble content in the adhesive part 230 after it cures and forms the bonded part 230, thereby improving the measurement accuracy of the Doppler underwater measuring device 200 in the application scenario. The bonded part 230 encloses the Doppler transducer 220 and bonds the Doppler transducer 220 to the shell body 210.

[0067] Referring to Figure 11, after the adhesive has cured to form the bonded part 230, the operator releases the switch 80 by releasing the finger that pressed the switch 80. At this time, the heating part 22 and the motor 31 stop working. Then, the pressure relief valve 40 is used to release the pressure in the negative pressure chamber 102 of the handheld part 10 to facilitate removal from the handheld negative pressure device 100.

[0068] Referring to Figures 12 and 13, after the adhesive portion 230 is formed in each of the four mounting slots 2102 of the shell body 210, the shell body 210 with the four Doppler transducers 220 vulcanized is removed from the top support element 310 of the manufacturing equipment 300.

[0069] Referring to Figure 14, after the measuring instrument circuit board 240 is installed in the housing space 2101 of the housing body 210, one end of the watertight cable 260 is sealed and inserted into the watertight through hole 2104 of the housing body 210 to allow this end of the watertight cable 260 to extend into the housing space 2101 of the housing body 210, and then the watertight cable 260 and the measuring instrument circuit board 240 are soldered.

[0070] Referring to Figure 15, the bottom cover 250 is placed on the shell body 210 so that the shell space 2101 of the shell body 210 is formed by the bottom cover 250 to create a watertight environment, thereby completing the manufacturing of the Doppler underwater measuring device 200.

[0071] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and any variations or modifications may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A handheld negative pressure device, characterized in that, include: A handheld part, wherein the handheld part has an assembly cavity and an opening facing a negative pressure cavity; A heating element, wherein the heating element is disposed in the handheld portion, and the heating element is configured to create a thermal environment in the negative pressure chamber of the handheld portion; A negative pressure pump, wherein the negative pressure pump is disposed in the assembly cavity of the handheld part, and the negative pressure pump is configured to create a negative pressure environment in the negative pressure cavity of the handheld part; And a pressure relief valve, wherein the pressure relief valve is disposed on the handgrip and is configured to relieve pressure in the negative pressure chamber of the handgrip.

2. The handheld negative pressure device according to claim 1, wherein the handheld part includes a handheld housing and a negative pressure housing, the negative pressure housing is installed on the handheld housing, the handheld part forms the assembly cavity between the handheld housing and the negative pressure housing, the negative pressure cavity of the handheld part is formed in the negative pressure housing, and wherein the heating element is disposed in the negative pressure housing.

3. The handheld negative pressure device according to claim 2, wherein a portion of the heating element is located in the negative pressure chamber of the handheld portion.

4. The handheld negative pressure device according to claim 2, wherein the handheld housing has a cavity and an opening communicating with the cavity, the rear part of the negative pressure housing extends into the cavity through the opening of the handheld housing, and is surrounded by the handheld housing around the negative pressure housing.

5. The handheld negative pressure device according to claim 4, wherein the opening of the negative pressure housing has a circumferentially extending abutment ring, the outer diameter of the abutment ring being larger than the inner diameter of the cavity of the handheld housing, and the abutment ring of the negative pressure housing abutting against the edge of the cavity of the handheld housing.

6. The handheld negative pressure device according to claim 5, wherein the handheld negative pressure device includes a flexible washer disposed on the abutment of the negative pressure housing, and the flexible washer protrudes from the end face of the opening of the negative pressure housing.

7. The handheld negative pressure device according to claim 6, wherein the collapsing ring of the negative pressure housing has an annular groove, the flexible washer has an annular protrusion, and the annular protrusion of the flexible washer is engaged in the annular groove of the collapsing ring.

8. The handheld negative pressure device according to claim 6, wherein the collapsing ring of the negative pressure housing has an annular locking protrusion, the flexible washer has an annular locking groove, and the annular locking protrusion of the collapsing ring is engaged with the annular locking groove of the flexible washer.

9. The handheld negative pressure device according to any one of claims 6 to 8, wherein the flexible washer is installed on the abutment of the negative pressure housing to provide the flexible washer to the abutment of the negative pressure housing.

10. The handheld negative pressure device according to any one of claims 6 to 8, wherein the flexible washer is integrally formed on the abutment of the negative pressure housing to provide the flexible washer on the abutment of the negative pressure housing.

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