Electric liquid conveying instrument

Abstract

The utility model provides an electric liquid delivery instrument which comprises a main shell and a liquid bottle, a linear driving mechanism, a control module, a first stop structure and a second stop structure are arranged in the main shell, the liquid bottle is fixed on the main shell, the linear driving mechanism is in electric control connection with the control module, and an output portion of the linear driving mechanism applies acting force to the liquid bottle. The output part is provided with a stop position close to the liquid bottle and an initial position far away from the liquid bottle, the output part corresponds to the first stop structure when moving to the stop position and corresponds to the second stop structure when moving to the initial position, a travel switch A in electric control connection with the control module is arranged on the main shell, and the travel switch A corresponds to the liquid bottle. And the liquid bottle is moved out to trigger the travel switch A, so that the output part moves to the initial position. In this way, the travel switch A can detect the installation condition of the liquid bottle and feed signals back to the control module so that the output part of the linear driving mechanism can move to the initial position to complete resetting, and manual resetting is not needed.

Description

Technical Field

[0001] This utility model relates to the field of dental care instruments, and in particular to an electric liquid transfer device. Background Technology

[0002] A teeth whitening liquid delivery device is essentially a liquid delivery device. When used in conjunction with teeth whitening liquid, it helps dentists apply the whitening liquid to the tooth surface more precisely and evenly.

[0003] Chinese utility model patent CN222195194U discloses a teeth whitening liquid delivery device, including a whitening liquid storage bottle assembly, a handle assembly, and a protective cap. The whitening liquid storage bottle assembly is used to store whitening liquid. The handle assembly includes a housing and a drive assembly disposed within the housing. One end of the whitening liquid storage bottle assembly is disposed on the housing. When the drive assembly performs a first action, it applies a force to the whitening liquid storage bottle assembly to quantitatively squeeze out the whitening liquid from the assembly. When the drive assembly performs a second action, it releases the force on the assembly. The protective cap is placed over the whitening liquid storage bottle assembly and connected to the housing to protect it. This utility model achieves quantitative squeezing of whitening liquid from the storage bottle assembly by applying a force to it through the drive assembly, ensuring the whitening effect of the whitening liquid on teeth while avoiding waste caused by over-squeezing when manually squeezing out the whitening liquid. However, after the whitening liquid is used up, the user still needs to manually perform the second action mentioned above to release the force of the drive component on the whitening liquid storage bottle component and reset the drive component, which is inconvenient for consumers.

[0004] Therefore, existing technologies still need to be improved and developed to address the aforementioned issues. Utility Model Content

[0005] The purpose of this invention is to provide an electric liquid transfer device that addresses the shortcomings and deficiencies of existing technologies.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides an electric liquid transfer device, which can be used to transfer teeth whitening liquid. It includes a main housing and a liquid bottle. The main housing houses a linear drive mechanism, a control module, a first stop structure, and a second stop structure. The liquid bottle is detachably fixed to the main housing. The linear drive mechanism is electrically connected to the control module. The output of the linear drive mechanism applies a force to the liquid bottle to expel liquid from the bottle. The output of the linear drive mechanism within the main housing has a termination position near the liquid bottle and an initial position away from the liquid bottle. When the output of the linear drive mechanism moves to the termination position, it corresponds to the first stop structure. When the output of the linear drive mechanism moves to the initial position, it corresponds to the second stop structure. More specifically, when applied to the delivery of teeth whitening liquid, one end of the liquid bottle is provided with a brush pen structure, which is connected to the liquid outlet of the liquid bottle. The other end of the liquid bottle can be provided with a piston or a sealing membrane structure. When a piston is used, the output of the linear drive mechanism acts on the piston. When a sealing membrane is used, the output of the linear drive mechanism can directly contact and act on the sealing membrane, and then push the liquid to be squeezed out. When liquid needs to be squeezed out, the control module controls the linear drive mechanism to move its output section toward the liquid bottle, while simultaneously applying a force to the liquid bottle to squeeze out the liquid. When the output section of the linear drive mechanism reaches the termination position, the first stop structure prevents the output section of the linear drive mechanism from continuing to move toward the liquid bottle. When the liquid in the liquid bottle is emptied, and the output section of the linear drive mechanism needs to be reset, the control module controls the linear drive mechanism to move its output section away from the liquid bottle. When the output section of the linear drive mechanism reaches the initial position, the second stop structure prevents the output section of the linear drive mechanism from continuing to move, thus completing the reset of the output section of the linear drive mechanism.

[0008] The main housing is equipped with a limit switch A electrically connected to the control module. Limit switch A corresponds to the liquid bottle. Removing the liquid bottle triggers limit switch A, causing the output of the linear drive mechanism to move to its initial position. More specifically, when the liquid bottle is removed, the separation of the liquid bottle from limit switch A triggers limit switch A. Limit switch A, through the control module, causes the output of the linear drive mechanism to move to its initial position, and in conjunction with the second stop structure, completes the reset of the linear drive mechanism's output. With this structural design, a limit switch A is added to the original electric liquid transmission instrument. Limit switch A can detect the installation status of the liquid bottle and feed the signal back to the control module, causing the linear drive mechanism to operate and move its output to its initial position to complete the reset. This eliminates the need to manually press the reset button before removing the liquid bottle, improving product safety and facilitating daily use.

[0009] According to the above scheme, the first stop structure includes a limit switch B, and the second stop structure includes a limit switch C. Both limit switches B and C are electrically connected to the control module. When the output of the linear drive mechanism moves to the termination position, the limit switch B is triggered to stop the linear drive mechanism from working. When the output of the linear drive mechanism moves to the initial position, the limit switch C is triggered to stop the linear drive mechanism from working. More specifically, both limit switches B and C are connected to the control module via conductive pins. When the output of the linear drive mechanism moves to the termination position and contacts the limit switch B, the limit switch B immediately responds and feeds a signal back to the control module. The control module then stops the linear drive mechanism from working. When the liquid bottle is removed, the output of the linear drive mechanism moves towards the initial position. When it reaches the initial position, the output of the linear drive mechanism contacts the limit switch C. The limit switch C immediately responds and feeds a signal back to the control module. The control module then stops the linear drive mechanism from working again, thus completing the reset of the output of the linear drive mechanism. With the above structural configuration, the limit switch B and the limit switch C can promptly provide feedback on the position signal of the output section of the linear drive mechanism, thereby enabling timely control of the closing of the linear drive mechanism.

[0010] According to the above scheme, the output part of the linear drive mechanism includes a threaded push rod, and the linear drive mechanism also includes a screw and a motor. One end of the screw is connected to the motor for transmission, and the other end of the screw is threadedly connected to the threaded push rod. The motor is electrically connected to the control module. When the threaded push rod moves to the termination position, the limit switch B is triggered. When the threaded push rod moves to the initial position, the limit switch C is triggered. More specifically, the control module can control the motor to rotate forward and reverse. When the motor rotates forward, the threaded push rod moves forward towards the termination position. When the motor rotates reverse, the threaded push rod moves backward towards the initial position. In addition, the control module can set the time for the threaded push rod to move towards the termination position when the motor starts to be 1-5 seconds, which controls the liquid extrusion time (here, the extrusion time can be calculated based on the relationship between the speed of the motor output shaft, the screw pitch, and the flow rate of the liquid bottle outlet), thereby realizing the quantitative output of liquid. After several extrusions, the threaded push rod reaches the termination position and immediately triggers the limit switch B, causing the motor to stop running. With the above structural design, linear motion of the output part of the linear drive mechanism can be achieved, while facilitating control of the amount of liquid squeezed out of the liquid bottle.

[0011] According to the above scheme, the piston and the end of the threaded push rod away from the screw are in contact. With the above structural arrangement, when the threaded push rod moves to the termination position, the threaded push rod pushes the piston, thereby causing the piston to squeeze out the liquid in the liquid. When the threaded push rod moves in the reverse direction to reset, it does not contact the piston, and the piston does not affect the reset of the threaded push rod.

[0012] According to the above scheme, the main housing includes a top shell and a handle shell. The top shell is a hollow cylindrical structure. One end of the top shell is detachably and fixedly connected to the liquid bottle, and the other end of the top shell is detachably and fixedly connected to the handle shell. The linear drive mechanism also includes a positioning block, which is positioned between the handle shell and the top shell. More specifically, the top shell and the handle shell clamp the positioning block. The threaded push rod, screw, motor, control module, limit switch A, limit switch B, and limit switch C are all located inside the handle shell. The positioning block has a positioning post, and the screw has a central hole. The screw passes through the threaded hole of the threaded push rod and connects to the positioning block. The positioning post is placed inside the central hole. Through the above structural arrangement, the positioning post positions the screw, preventing the screw from shaking inside the handle shell during rotation and affecting the fit between the screw and the threaded push rod.

[0013] According to the above scheme, the threaded push rod includes a push rod body, a guide block, and a push rod cap. The push rod body has a threaded through hole and is threadedly connected to the screw. When the threaded push rod moves to the termination position, the push rod body triggers the limit switch B; when the threaded push rod moves to the initial position, the push rod body triggers the limit switch C. The guide block is fixedly connected to the push rod body, and at least two guide blocks are provided. The guide blocks are arranged around the threaded through hole. The positioning block has at least two clearance holes, and the end of the guide block away from the push rod body passes through the clearance holes and is fixedly connected to the push rod cap. Through the above structural design, the clearance holes can prevent the positioning block from affecting the linear movement of the threaded push rod.

[0014] This utility model also includes a switch fixing block. The limit switch A is fixed to one side of the switch fixing block, and the limit switch B is fixed to the other side. The switch fixing block has a through hole, and the positioning block has a clearance opening. The switch fixing block is positioned on the side of the positioning block closest to the push rod body. The positioning pin passes through the through hole and is placed inside the central hole, while the limit switch A is placed inside the clearance opening. This structural design facilitates the installation of limit switches A and B, allowing limit switch A to correspond to the liquid bottle and limit switch B to correspond to the push rod body.

[0015] According to the above design, the handle housing also includes a motor bracket, a circuit board, and a battery. The control module is mounted on the circuit board, and the motor, circuit board, and battery are all fixedly mounted on the motor bracket. This structural design facilitates the secure installation of the motor, circuit board, battery, and other components within the handle housing.

[0016] According to the above scheme, a motor switch is fixedly installed on the circuit board. The motor switch is electrically connected to the control module. A button for triggering the motor switch is provided on the handle shell. It should be noted that the motor switch is only used to control the motor to rotate forward after the power is turned on. With the above structural setting, the user can press the button to start the motor. The motor rotates forward, the threaded push rod moves forward towards the termination position, and at the same time pushes the piston, causing the liquid to be squeezed out from the outlet. The motor rotates for 1-5 seconds and then automatically stops. This utility model is designed so that the motor stops rotating after 5 seconds.

[0017] According to the above scheme, the limit switch C is fixed on the circuit board. Through this structural arrangement, the limit switch C can be integrated onto the circuit board, facilitating its connection with the control module on the circuit board.

[0018] The beneficial effects of this utility model are:

[0019] This invention adds a limit switch A to the existing electric liquid transmission device. The limit switch A can detect the installation status of the liquid bottle and feed the signal back to the control module to make the linear drive mechanism work and drive its output part to move back to the initial position to complete the reset. There is no need to manually press the reset button and then remove the liquid bottle, which improves the safety of the product and facilitates the daily use of users. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the threaded push rod of this utility model in its initial position;

[0021] Figure 2 This is a cross-sectional view of the threaded push rod of this utility model in the termination position;

[0022] Figure 3 This is a cross-sectional view of the liquid bottle and limit switch A of this utility model when they are separated;

[0023] Figure 4 This is an exploded structural diagram of the present invention;

[0024] Figure 5 This is a schematic diagram of the appearance structure of this utility model.

[0025] In the diagram: 1. Main housing; 2. Liquid bottle; 3. Linear drive mechanism; 4. Control module; 5. Limit switch A; 6. Limit switch B; 7. Limit switch C; 8. Switch fixing block; 9. Motor bracket; 10. Circuit board; 11. Battery; 12. Motor switch; 13. Button; 14. Conductive pin; 21. Piston; 31. Threaded push rod; 32. Screw; 33. Motor; 34. Positioning block; 81. Through hole; 101. Top shell; 102. Handle shell; 311. Push rod body; 312. Guide block; 313. Push rod cap; 321. Center hole; 341. Positioning post; 342. Clearance hole; 343. Clearance opening. Detailed Implementation

[0026] The technical solution of this utility model will be described below with reference to the accompanying drawings and embodiments.

[0027] Example 1

[0028] like Figure 1-5As shown, this utility model provides an electric liquid transfer device that can be used to transfer teeth whitening liquid. It includes a main housing 1 and a liquid bottle 2. The main housing 1 houses a linear drive mechanism 3, a control module 4, a first stop structure, and a second stop structure. The liquid bottle 2 is detachably fixed to the main housing 1. The linear drive mechanism 3 is electrically connected to the control module 4. The output of the linear drive mechanism 3 applies a force to the liquid bottle 2 to expel liquid from the bottle. The output of the linear drive mechanism 3 has a termination position within the main housing 1 near the liquid bottle 2 (see reference). Figure 2 ) and the initial position away from liquid bottle 2 (reference) Figure 1 When the output of the linear drive mechanism 3 moves to the termination position, it corresponds to the first stop structure; when the output of the linear drive mechanism 3 moves to the initial position, it corresponds to the second stop structure. More specifically, when applied to the delivery of teeth whitening liquid, one end of the liquid bottle 2 is provided with a brush pen structure, which is connected to the outlet of the liquid bottle 2. The other end of the liquid bottle 2 can be provided with a piston 21, and the output of the linear drive mechanism 3 acts on the piston 21. When liquid needs to be squeezed out, the control module 4 controls the linear drive mechanism 3 to move its output section toward the liquid bottle 2. When it contacts the liquid bottle 2, it applies a force to squeeze out the liquid. When the output section of the linear drive mechanism 3 reaches the termination position, the first stop structure prevents the output section of the linear drive mechanism 3 from continuing to move toward the liquid bottle 2. When the liquid in the liquid bottle 2 is emptied, and the output section of the linear drive mechanism 3 needs to be reset, the control module 4 controls the linear drive mechanism 3 to move its output section away from the liquid bottle 2. When the output section reaches the initial position, the second stop structure prevents the output section of the linear drive mechanism 3 from continuing to move, thus completing the reset.

[0029] The main housing 1 is equipped with a limit switch A5 electrically connected to the control module 4. The limit switch A5 is correspondingly arranged with the liquid bottle 2. Moving the liquid bottle 2 triggers the limit switch A5, causing the output of the linear drive mechanism 3 to move back to its initial position. More specifically, when the liquid bottle 2 is moved (refer to...), Figure 3When the liquid bottle 2 separates from the limit switch A5, the limit switch A5 is triggered. The limit switch A5, through the control module 4, moves the output of the linear drive mechanism 3 back to its initial position and, in conjunction with the second stop structure, resets the output. With this structural design, a limit switch A5 is added to the existing electric liquid transmission instrument. The limit switch A5 can detect the installation status of the liquid bottle 2 and feeds a signal back to the control module 4, causing the linear drive mechanism 3 to move its output back to its initial position to complete the reset. This eliminates the need to manually press the reset button and then remove the liquid bottle 2, improving product safety and facilitating daily use.

[0030] Furthermore, the first stop structure includes a limit switch B6, and the second stop structure includes a limit switch C7. Both limit switches B6 and C7 are electrically connected to the control module 4. When the output of the linear drive mechanism 3 moves to the termination position, the limit switch B6 is triggered to stop the linear drive mechanism 3. When the output of the linear drive mechanism 3 moves to the initial position, the limit switch C7 is triggered to stop the linear drive mechanism 3. More specifically, both limit switches B6 and C7 are connected to the control module 4 via conductive pins 14. Next, when the output of the linear drive mechanism 3 moves to the termination position, it contacts the limit switch B6. The limit switch B6 immediately responds and feeds a signal back to the control module 4. The control module 4 then stops the linear drive mechanism 3. When the liquid bottle 2 is removed, the output of the linear drive mechanism 3 moves towards the initial position. Upon reaching the initial position, the output of the linear drive mechanism 3 contacts the limit switch C7. The limit switch C7 immediately responds and feeds a signal back to the control module 4. The control module 4 then stops the linear drive mechanism 3 again, thus completing the reset of the output. Through the above structural design, the limit switches B6 and C7 can promptly feed back the position signal of the output of the linear drive mechanism 3, thereby enabling timely control of the closing of the linear drive mechanism 3.

[0031] Furthermore, the output section of the linear drive mechanism 3 includes a threaded push rod 31. The linear drive mechanism 3 includes a screw 32 and a motor 33. One end of the screw 32 is connected to the motor 33 for transmission, and the other end of the screw 32 is threadedly connected to the threaded push rod 31. The motor 33 is electrically connected to the control module 4. When the threaded push rod 31 moves to the termination position, it triggers the limit switch B6. When the threaded push rod 31 moves to the initial position, it triggers the limit switch C7. More specifically, the control module 4 can control the motor 33 to rotate forward and reverse. When the motor 33 rotates forward, the threaded push rod... When motor 31 moves in the direction of the termination position, and motor 33 reverses, threaded push rod 31 moves in the opposite direction of the initial position. Additionally, the control module 4 can be set to allow the threaded push rod 31 to move towards the termination position for 1-5 seconds after motor 33 starts, thus controlling the liquid extrusion time (this extrusion time can be calculated based on the relationship between the rotational speed of motor 33's output shaft, the screw pitch of screw 32, and the flow rate at the outlet of liquid bottle 2). This achieves quantitative liquid output. After several extrusions, threaded push rod 31 reaches the termination position and immediately triggers limit switch B6, stopping motor 33. This structural design enables linear movement of the output part of the linear drive mechanism 3, while also facilitating control of the amount of liquid extruded from liquid bottle 2.

[0032] Furthermore, the piston 21 is in contact with the end of the threaded push rod 31 away from the screw 32. With this structural arrangement, when the threaded push rod 31 moves to the termination position, it pushes the piston 21, causing the piston 21 to expel the liquid from the liquid. When the threaded push rod 31 moves in the reverse direction to reset, it does not contact the piston 21, and the piston 21 does not affect the reset of the threaded push rod 31.

[0033] Furthermore, the main housing 1 includes a top shell 101 and a handle shell 102. The top shell 101 is a hollow cylindrical structure. One end of the top shell 101 is detachably and fixedly connected to the liquid bottle 2, and the other end of the top shell 101 is detachably and fixedly connected to the handle shell 102. The linear drive mechanism 3 also includes a positioning block 34, which is positioned between the handle shell 102 and the top shell 101. More specifically, the top shell 101 and the handle shell 102 clamp the positioning block 34. The threaded push rod 31, the screw 32, the motor 33, the control module 4, the limit switch A5, the limit switch B6, and the limit switch C7 are all located inside the handle shell 102. The positioning block 34 is provided with a positioning post 341, and the screw 32 is provided with a central hole 321. The screw 32 passes through the threaded hole of the threaded push rod 31 and connects to the positioning block 34. The positioning post 341 is placed inside the central hole 321. With the above-described structure, the positioning post 341 positions the screw 32, which can prevent the screw 32 from shaking inside the handle housing 102 when it rotates, thus affecting the fit between the screw 32 and the threaded push rod 31.

[0034] Furthermore, the threaded push rod 31 includes a push rod body 311, a guide block 312, and a push rod cap 313. The push rod body 311 has a threaded through hole 81. The push rod body 311 is threadedly connected to the screw 32. When the threaded push rod 31 moves to the termination position, the push rod body 311 triggers the limit switch B6. When the threaded push rod 31 moves to the initial position, the push rod body 311 triggers the limit switch C7. The guide block 312 is fixedly connected to the push rod body 311. At least two guide blocks 312 are provided, and the guide blocks 312 are arranged around the threaded through hole 81. The positioning block 34 has at least two clearance holes 342. One end of the guide block 312 away from the push rod body 311 passes through the clearance hole 342 and is fixedly connected to the push rod cap 313. Through the above structural arrangement, the clearance holes 342 can prevent the positioning block 34 from affecting the linear movement of the threaded push rod 31.

[0035] This utility model also includes a switch fixing block 8. The limit switch A5 is fixed to one side of the switch fixing block 8, and the limit switch B6 is fixed to the other side. The switch fixing block 8 has a through hole 81, and the positioning block 34 has a clearance opening 343. The switch fixing block 8 is positioned on the side of the positioning block 34 closest to the push rod body 311. The positioning pin 341 passes through the through hole 81 and is placed inside the central hole 321. The limit switch A5 is placed inside the clearance opening 343. This structural arrangement facilitates the installation of the limit switches A5 and B6, allowing the limit switch A5 to correspond to the liquid bottle 2 and the limit switch B6 to correspond to the push rod body 311.

[0036] Furthermore, the handle housing 102 also includes a motor 33 bracket 9, a circuit board 10, and a battery 11. The control module 4 is mounted on the circuit board 10, and the motor 33, circuit board 10, and battery 11 are all fixedly mounted on the motor 33 bracket 9. This structural arrangement facilitates the stable installation of the motor 33, circuit board 10, battery 11, and other components within the handle housing 102.

[0037] Furthermore, a motor switch 12 is fixedly mounted on the circuit board 10. The motor switch 12 is electrically connected to the control module 4. A button 13 is provided on the handle housing 102 for triggering the motor switch 12. It should be noted that the motor switch 12 is only used to control the motor 33 to rotate forward after the power is turned on. With the above structural configuration, the user can press the button 13 to start the motor 33. The motor 33 rotates forward, and the threaded push rod 31 rotates forward and moves towards the termination position, while simultaneously pushing the piston 21 to squeeze the liquid out of the outlet. The motor 33 rotates for 1-5 seconds and then automatically stops. In this embodiment, the motor 33 is set to stop rotating after 5 seconds.

[0038] Furthermore, the limit switch C7 is fixed to the circuit board 10. This structural arrangement allows the limit switch C7 to be integrated onto the circuit board 10, facilitating its connection to the control module 4 on the circuit board 10.

[0039] How to use this utility model:

[0040] When liquid needs to be squeezed out, press button 13 to start motor 33. Motor 33 rotates forward, driving the pusher body 311 of threaded pusher 31 to move closer to liquid bottle 2. The pusher cap 313 of threaded pusher 31 presses against piston 21 inside liquid bottle 2, causing liquid to be squeezed out from the outlet of liquid bottle 2. After 5 seconds, motor 33 automatically stops rotating. When button 13 is pressed again, motor 33 continues to rotate forward, and liquid continues to be squeezed out. After the liquid in liquid bottle 2 has been squeezed out several times, the pusher of screw 32 is in the termination position. The pusher body 311 triggers limit switch B6. Limit switch B6 feeds back a signal to control module 4. Control module 4 stops motor 33 from rotating. Even if button 13 is pressed again, motor 33 will not run.

[0041] When it is necessary to replace liquid bottle 2, such as Figure 3 As shown, the user removes the liquid bottle 2, separating it from the limit switch A5. The limit switch A5 sends a signal to the control module 4, which causes the motor 33 to rotate in the opposite direction, moving the push rod body 311 of the threaded push rod 31 away from the liquid bottle 2. When it reaches the initial position, the push rod body 311 triggers the limit switch C7, which sends a signal to the control module 4. The control module 4 then stops the motor 33, thus completing the reset of the threaded push rod 31.

[0042] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. An electric liquid transfer device, comprising a main housing (1) and a liquid bottle (2), wherein the main housing (1) is provided with a linear drive mechanism (3), a control module (4), a first stop structure, and a second stop structure, the liquid bottle (2) being detachably fixed to the main housing (1), the linear drive mechanism (3) being electrically connected to the control module (4), the output of the linear drive mechanism (3) applying a force to the liquid bottle (2) to expel liquid from the liquid bottle (2), the output of the linear drive mechanism (3) having a termination position close to the liquid bottle (2) and an initial position away from the liquid bottle (2) within the main housing (1), the output of the linear drive mechanism (3) corresponding to the first stop structure when moving to the termination position, and corresponding to the second stop structure when moving to the initial position, characterized in that, The main housing (1) is provided with a limit switch A (5) that is electrically connected to the control module (4). The limit switch A (5) is correspondingly set to the liquid bottle (2). Moving the liquid bottle (2) triggers the limit switch A (5) so that the output of the linear drive mechanism (3) moves to the initial position.

2. The electrically powered liquid transfer device according to claim 1, characterized in that, The first stop structure includes a limit switch B (6), and the second stop structure includes a limit switch C (7). Both the limit switch B (6) and the limit switch C (7) are electrically connected to the control module (4). When the output of the linear drive mechanism (3) moves to the termination position, the limit switch B (6) is triggered to stop the linear drive mechanism (3). When the output of the linear drive mechanism (3) moves to the initial position, the limit switch C (7) is triggered to stop the linear drive mechanism (3).

3. The electrically powered liquid transfer device according to claim 2, characterized in that, The output part of the linear drive mechanism (3) includes a threaded push rod (31). The linear drive mechanism (3) includes a screw (32) and a motor (33). One end of the screw (32) is connected to the motor (33) for transmission. The threaded push rod (31) is threaded onto the screw (32). The motor (33) is electrically connected to the control module (4). When the threaded push rod (31) moves to the termination position, the limit switch B (6) is triggered. When the threaded push rod (31) moves to the initial position, the limit switch C (7) is triggered.

4. The electrically powered liquid transfer device according to claim 3, characterized in that, The liquid bottle (2) is provided with a piston (21), and the piston (21) is in contact with the end of the threaded push rod (31) away from the screw (32).

5. The electrically powered liquid transfer device according to claim 3, characterized in that, The main housing (1) includes a top shell (101) and a handle shell (102). The top shell (101) is a hollow cylindrical structure. One end of the top shell (101) is detachably and fixedly connected to the liquid bottle (2), and the other end of the top shell (101) is detachably and fixedly connected to the handle shell (102). The linear drive mechanism (3) further includes a positioning block (34), which is positioned between the handle shell (102) and the top shell (101). The threaded push... The rod (31), screw (32), motor (33), control module (4), limit switch A (5), limit switch B (6) and limit switch C (7) are all located inside the handle housing (102). The positioning block (34) is provided with a positioning post (341). The screw (32) is provided with a center hole (321). The screw (32) passes through the threaded push rod (31) and is connected to the positioning block (34). The positioning post (341) is placed in the center hole (321).

6. The electrically powered liquid transfer device according to claim 5, characterized in that, The threaded push rod (31) includes a push rod body (311), a guide block (312), and a push rod cap (313). The push rod body (311) has a threaded through hole (81). The push rod body (311) is threadedly connected to the screw (32). When the threaded push rod (31) moves to the termination position, the push rod body (311) triggers the limit switch B (6). When the threaded push rod (31) moves to the initial position, the push rod body (311) touches... The limit switch C (7) is activated. The guide block (312) is fixedly connected to the push rod body (311). There are at least two guide blocks (312). The guide blocks (312) are arranged around the threaded through hole (81). The positioning block (34) is provided with at least two clearance holes (342). The end of the guide block (312) away from the push rod body (311) passes through the clearance hole (342) and is fixedly connected to the push rod cap (313).

7. The electrically powered liquid transfer device according to claim 6, characterized in that, It also includes a switch fixing block (8), on one side of which the limit switch A (5) is fixed, and on the other side of which the limit switch B (6) is fixed. The switch fixing block (8) has a through hole (81), and the positioning block (34) has a clearance opening (343). The switch fixing block (8) is limited to the side of the positioning block (34) near the push rod body (311). The positioning pin (341) passes through the through hole (81) and is placed in the center hole (321). The limit switch A (5) is placed in the clearance opening (343).

8. The electrically powered liquid transfer device according to claim 7, characterized in that, The handle housing (102) is also provided with a motor (33) bracket (9), a circuit board (10) and a battery (11). The control module (4) is set on the circuit board (10). The motor (33), the circuit board (10) and the battery (11) are all fixedly installed on the motor (33) bracket (9).

9. The electrically powered liquid transfer device according to claim 8, characterized in that, A motor switch (12) is fixedly provided on the circuit board (10). The motor switch (12) is electrically connected to the control module (4). A button (13) for triggering the motor switch (12) is provided on the handle shell (102).

10. The electrically powered liquid transfer device according to claim 8, characterized in that, The limit switch C (7) is fixed on the circuit board (10).

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