Liquid injection device

Abstract

The invention provides a liquid injection device which comprises a shell, a reversing valve, a power pump, a liquid inlet piece with a liquid inlet channel and a liquid injection piece with a liquid injection channel, the reversing valve is provided with a first connector, a second connector, a third connector and a fourth connector, when the reversing valve is in a first working state, the first connector is communicated with the third connector, and when the reversing valve is in a second working state, the second connector is communicated with the fourth connector; when the reversing valve is in a first working state, the second connecting port is communicated with the fourth connecting port, and when the reversing valve is in a second working state, the first connecting port is communicated with the fourth connecting port, and the second connecting port is communicated with the third connecting port; the power pump is provided with a power pump liquid inlet end and a power pump liquid outlet end, the power pump liquid inlet end is communicated with the fourth connecting port, the power pump liquid outlet end is communicated with the third connecting port, a liquid inlet channel of the liquid inlet piece is communicated with the second connecting port, and a liquid injection channel of the liquid injection piece is communicated with the first connecting port. According to the liquid injection device, handheld operation can be achieved, and liquid in the liquid injection device and liquid in a pipeline connected with the liquid injection device can be immediately conveyed back to the liquid storage device in the reverse direction after liquid injection is completed.

Description

Technical Field

[0001] The invention relates to the field of liquid injection devices, in particular to a handheld electrically operated liquid injection device. Background Art

[0002] In production and life, we often encounter situations where we need to inject liquid into certain containers, such as adding water to a humidifier, adding alcohol fuel to an alcohol lamp, etc. The original method usually uses tools such as funnels. The funnel needs to be supported when in use, which is very inconvenient to use and it is easy to add excessive liquid.

[0003] There are also some handheld devices on the market that can provide power to extract liquids, extracting liquids from one container and injecting them into another container. However, these devices usually only provide power in one direction for liquid extraction. After the container is filled with liquid, when the handheld device is stopped for extraction, liquid will remain in its internal pipeline. These liquids will spill everywhere when the handheld device is placed, which is very inconvenient to use. Summary of the invention

[0004] In order to overcome the deficiencies in the prior art, the present invention provides a liquid injection device, which can not only be operated by hand, but also immediately transport the liquid inside the device and the liquid in the connected pipe back to the liquid storage device after the liquid injection is completed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A liquid injection device comprises a shell, a reversing valve, a power pump, a liquid inlet part having a liquid inlet channel and a liquid injection part having a liquid injection channel, the reversing valve and the power pump are arranged in the shell, the reversing valve is provided with a first connection port, a second connection port, a third connection port, and a fourth connection port, the reversing valve has a first working state and a second working state, and when the reversing valve is in the first working state, the first connection port is communicated with the third connection port, and the second connection port is communicated with the fourth connection port, and when the reversing valve is in the second working state, the first connection port is communicated with the fourth connection port, and the second connection port is communicated with the third connection port; the power pump has a power pump liquid inlet end and a power pump liquid outlet end, the power pump liquid inlet end is communicated with the fourth connection port, the power pump liquid outlet end is communicated with the third connection port, the liquid inlet channel of the liquid inlet part is communicated with the second connection port, and the liquid injection channel of the liquid injection part is communicated with the first connection port.

[0007] When in use, the liquid inlet member is connected to the liquid storage device through a suitable pipeline.

[0008] With the above structure, when the user needs to inject liquid, the user needs to align the injection piece with the injection port of the container into which the liquid is to be injected, and operate the injection device so that the reversing valve is in the first working state. At this time, the first connecting port is connected with the third connecting port, and the second connecting port is connected with the fourth connecting port, that is, the injection channel of the injection piece is connected with the power pump outlet end of the power pump, and the liquid inlet channel of the liquid inlet piece is connected with the power pump inlet end of the power pump. When the power pump is working, the liquid flows from the liquid inlet channel of the liquid inlet piece via the power pump to the injection channel of the injection piece, and flows out from the injection channel of the injection piece to complete the injection.

[0009] When the user stops injecting liquid, the injection device is operated to put the reversing valve in the second working state. At this time, the first connection port is connected with the fourth connection port, and the second connection port is connected with the third connection port; that is, the injection channel of the injection piece is connected with the power pump inlet end of the power pump, and the inlet channel of the inlet piece is connected with the power pump outlet end of the power pump. When the power pump is working, the liquid flows from the injection channel of the injection piece via the power pump to the inlet channel of the inlet piece, and flows back from the injection channel of the injection piece to the liquid storage device;

[0010] The above structure enables the user to transport the residual liquid in the internal pipeline back to the liquid storage device when stopping the injection, so as to avoid the liquid remaining in the injection device, thereby preventing the injection device from moving and the liquid from flowing out.

[0011] Further, the reversing valve comprises a valve body, and a first valve stem and a second valve stem, the valve body is provided with a first connecting port and a second connecting port, and a third connecting port and a fourth connecting port, the valve body is provided with a first reversing cavity and a second reversing cavity, the first connecting port is communicated with the first reversing cavity, and the second connecting port is communicated with the second reversing cavity;

[0012] The first valve stem is movably arranged on the valve body, and the first reversing cavity is provided with a first reversing port and a second reversing port in the moving direction of the first valve stem, and the first reversing port is communicated with the third connecting port through a first internal flow channel, and the second reversing port is communicated with the fourth connecting port through a second internal flow channel; one end of the first valve stem is located in the first reversing cavity and is provided with a first opening and closing structure, and the first opening and closing structure closes the first reversing port and opens the second reversing port when approaching the first reversing port, and the first opening and closing structure closes the second reversing port and opens the first reversing port when approaching the second reversing port;

[0013] The second valve stem is movably arranged on the valve body, and the second reversing cavity is provided with a third reversing port and a fourth reversing port in the moving direction of the second valve stem, and the third reversing port is connected with the fourth connecting port through a third internal flow channel, and the fourth reversing port is connected with the third connecting port through a fourth internal flow channel; one end of the second valve stem is located in the second reversing cavity and is provided with a second opening and closing structure, and the second opening and closing structure closes the third reversing port and opens the fourth reversing port when approaching the third reversing port, and the second opening and closing structure closes the fourth reversing port and opens the third reversing port when approaching the fourth reversing port.

[0014] With the above structure, when the first valve stem moves so that the first opening and closing structure closes the first reversing port, and the second valve stem moves so that the second opening and closing structure closes the third reversing port, the first connecting port is communicated with the fourth connecting port through the first reversing cavity, the second reversing port of the first reversing cavity, and the second internal flow channel, and the second connecting port is communicated with the third connecting port through the second reversing cavity, the fourth reversing port of the second reversing cavity, and the fourth internal flow channel. At this time, the reversing valve is in the second working state;

[0015] When the first valve stem moves so that the first opening and closing structure closes the second reversing port, and the second valve stem moves so that the second opening and closing structure closes the fourth reversing port, the first connecting port is communicated with the third connecting port through the first reversing cavity, the first reversing port of the first reversing cavity, and the first internal flow channel, and the second connecting port is communicated with the fourth connecting port through the second reversing cavity, the third reversing port of the second reversing cavity, and the third internal flow channel. At this time, the reversing valve is in the first working state;

[0016] Therefore, the user only needs to simply operate the first valve stem and the second valve stem to achieve the switching operation. The above structure is simple and can reduce the overall volume, that is, the required installation space is small, so that the injection device can be miniaturized and convenient for users to hold.

[0017] Specifically, the valve body is provided with a first connecting channel, a second connecting channel, a third connecting channel and a fourth connecting channel, the end of the first connecting channel facing the outside is formed as the first connecting port, the end of the second connecting channel facing the outside is formed as the second connecting port, the end of the third connecting channel facing the outside is formed as the third connecting port, and the end of the fourth connecting channel facing the outside is formed as the fourth connecting port, the first connecting port is connected with the first reversing chamber through the first connecting channel, the second connecting port is connected with the second reversing chamber through the second connecting channel, the first internal flow channel and the fourth internal flow channel are connected with the third connecting port through the third connecting channel, and the second internal flow channel and the third internal flow channel are connected with the fourth connecting port through the fourth connecting channel.

[0018] Further, the axis of the first valve stem is parallel to the axis of the second valve stem; and the direction from the first reversing port to the second reversing port is consistent with the direction from the third reversing port to the fourth reversing port.

[0019] The above structure makes the structure of the reversing valve more reasonable, and facilitates synchronous operation of the first valve stem and the second valve stem.

[0020] Further, the valve body includes a first channel, a second channel, a third channel, a fourth channel, a fifth channel and a sixth channel, the first channel has an extension distance in a direction parallel to the axis of the first valve stem, two ends of the first channel are formed as a first channel port and a second channel port, and the direction from the first channel port to the second channel port is consistent with the direction from the first reversing port to the second reversing port; the second channel has an extension distance in a direction parallel to the axis of the second valve stem, two ends of the second channel are formed as a third channel port and a fourth channel port, and the direction from the third channel port to the fourth channel port is consistent with the direction from the third reversing port to the fourth reversing port;

[0021] The third channel is disposed between the second channel port and the second reversing port and connects the second channel port with the second reversing port, and the fourth channel is disposed between the fourth channel port and the fourth reversing port and connects the fourth channel port with the fourth reversing port;

[0022] The fifth channel is used to connect the first reversing port, the third channel port and the third connecting port, and the sixth channel is used to connect the third reversing port, the first channel port and the fourth connecting port.

[0023] Specifically, the fifth channel or part thereof forms the first internal flow channel; the third channel, the first channel, the sixth channel or part thereof forms the second internal flow channel; the sixth channel or part thereof forms the third internal flow channel, and the fourth channel, the second channel, the fifth channel or part thereof forms the fourth internal flow channel.

[0024] The above structure makes the design of the reversing valve more reasonable. The internal flow channel of the valve body is arranged in a three-dimensional space, which can further reduce the volume of the reversing valve, that is, further reduce the space required for its installation; and the fifth channel or a part thereof is a common part of the first internal flow channel and the fourth internal flow channel, and the sixth channel or a part thereof is a common part of the second internal flow channel and the third internal flow channel. The internal flow channel of the valve body is optimized to simplify the structure, which is not only conducive to reducing the volume of the valve body, but also reduces the difficulty of processing the valve body;

[0025] The above structure makes it easier to reduce the size of the reversing valve, thereby making the liquid injection device more miniaturized and convenient for users to hold in hand.

[0026] Further, the valve body includes a valve bottom, a valve core, a reversing layer, and a valve cover; the valve core is located on one side of the valve bottom, the reversing layer is arranged on the side of the valve core away from the valve bottom, the valve cover is arranged on the side of the reversing layer away from the valve core, the valve core is provided with the first reversing chamber, the second reversing chamber, the first channel, the second channel, the third channel and the fourth channel, and the reversing layer is provided with the fifth channel and the sixth channel; the first connecting port and the second connecting port are arranged on the valve core, the third connecting port and the fourth connecting port are arranged on the valve cover, the first reversing port and the third reversing port are arranged close to the reversing layer, and the second reversing port and the fourth reversing port are arranged close to the valve bottom.

[0027] The above structure makes the structure of the valve body more reasonable, and the internal flow channel is formed by stacking the layered structure, which is convenient for production, processing and installation.

[0028] Further, the valve core comprises a valve core body and a valve sealing gasket, the valve core body is arranged on the valve bottom, the valve sealing gasket is arranged on a side of the valve core body away from the valve bottom, and the valve core body is provided with a first valve core cavity and a second valve core cavity;

[0029] The first valve core cavity comprises a first valve core upper cavity arranged away from the valve bottom, and a first valve core lower cavity arranged near the valve bottom, one end of the first valve core upper cavity away from the first valve core lower cavity is formed as a first valve core upper opening, the valve sealing gasket is provided with the first reversing port at the first valve core upper opening, and the first reversing port is communicated with the first valve core upper opening, the first valve core upper cavity is communicated with the first valve core lower cavity and forms the second reversing port at the communicating portion, the first valve core upper cavity and the valve sealing gasket covering the first valve core upper opening enclose the first reversing cavity, and the first valve core lower cavity extends to the first channel side and is communicated with it to form the third channel;

[0030] The second valve core chamber comprises a second valve core upper chamber arranged away from the valve bottom, and a second valve core lower chamber arranged near the valve bottom, one end of the second valve core upper chamber away from the second valve core lower chamber is formed as a second valve core upper opening, the valve sealing gasket is provided with the third reversing port at the second valve core upper opening, and the third reversing port is communicated with the second valve core upper opening, the second valve core upper chamber is communicated with the second valve core lower chamber and forms the fourth reversing port at the communicating portion, the second valve core upper chamber and the valve sealing gasket covering the second valve core upper opening enclose the second reversing chamber, and the second valve core lower chamber extends toward the second channel side and is communicated with it to form the fourth channel;

[0031] The first channel includes a first channel valve core body section formed on the valve core body, and a first channel sealing gasket section formed on the valve sealing gasket; the second channel includes a second channel valve core body section formed on the valve core body, and a second channel sealing gasket section formed on the valve sealing gasket.

[0032] By adopting the above structure, the valve core is further divided into layered modular parts to facilitate the processing of the channel in the valve core; and the valve sealing gasket adopts sealing material, specifically flexible material, which can increase the sealing type between the valve core and the reversing layer after installation to avoid liquid leakage; the functions are integrated and the structure is further simplified to reduce the final volume of the reversing valve.

[0033] Further, the reversing valve includes a valve bottom sealing gasket arranged between the valve bottom and the valve core; a third channel cross-sectional opening is formed on the end surface of the valve core facing the valve bottom on the side of the third channel facing the valve bottom, and a fourth channel cross-sectional opening is formed on the end surface of the valve core facing the valve bottom on the side of the fourth channel facing the valve bottom.

[0034] The above structure is adopted to facilitate the actual processing of the third channel and the fourth channel, and the valve bottom sealing gasket is provided to achieve a better sealing effect between the valve core and the valve bottom. The above structure is reasonable; the valve bottom sealing gasket is made of sealing material, specifically flexible material.

[0035] Furthermore, the end surface of the valve bottom sealing gasket facing the valve core is arranged in a complete plane;

[0036] Alternatively, the end surface of the valve bottom sealing gasket facing the valve core is recessed toward the valve bottom side at a position corresponding to the third channel cross-sectional opening or penetrates itself to form a first valve bottom sealing gasket channel, and the end surface of the valve bottom sealing gasket facing the valve core is recessed toward the valve bottom side at a position corresponding to the fourth channel cross-sectional opening or penetrates itself to form a second valve bottom sealing gasket channel.

[0037] By adopting the above structure, when the valve bottom sealing gasket is provided with the first valve bottom sealing gasket channel and the second valve bottom sealing gasket channel, the flow rate of the liquid through the third channel and the fourth channel can be increased without affecting the sealing performance between the valve core and the valve bottom and without increasing the volume of the reversing valve.

[0038] Further, the shape of the first valve bottom sealing gasket channel is consistent with the shape of the third channel cross-sectional opening, and the shape of the second valve bottom sealing gasket channel is consistent with the shape of the fourth channel cross-sectional opening.

[0039] By adopting the above structure, the structures of the first valve bottom sealing gasket channel and the second valve bottom sealing gasket channel are more reasonable.

[0040] Further, the reversing valve includes a valve cover sealing gasket arranged between the reversing layer and the valve cover, the valve cover sealing gasket has a first sealing avoidance opening at the connection between the fifth channel and the third connecting port, and the valve cover sealing gasket has a second sealing avoidance opening at the connection between the sixth channel and the fourth connecting port.

[0041] With the above structure, the setting of the valve cover sealing gasket can ensure the sealing effect between the reversing layer and the valve cover, and the setting of the first sealing avoidance opening and the second sealing avoidance opening enables the fifth channel to be connected with the third connecting port through the first sealing avoidance opening, and the sixth channel to be connected with the fourth connecting port through the second sealing avoidance opening; the above structure is reasonable, and the valve cover sealing gasket adopts a sealing material, specifically a flexible material.

[0042] Furthermore, the valve cover sealing gasket protrudes away from the reversing layer at the first valve stem and the second valve stem to form a first membrane cavity and a second membrane cavity, and the reversing layer is respectively provided with a first valve stem guide hole and a second valve stem guide hole at the first valve stem and the second valve stem, and the end of the first valve stem without the first opening and closing structure passes through the first valve stem guide hole and is located in the first membrane cavity, and the end of the second valve stem without the second opening and closing structure passes through the second valve stem guide hole and is located in the second membrane cavity.

[0043] With the above structure, the first membrane cavity and the second membrane cavity are arranged so that the first valve stem and the second valve stem are completely arranged inside the valve body, and the sealing performance is better. Even if the sealing performance of the first valve stem and the second valve stem decreases after long-term use, the leakage caused is the internal leakage between the first connection port, the second connection port, the third connection port and the fourth connection port, and no leakage occurs to the outside, which is safer.

[0044] Moreover, the setting of the first valve stem guide hole can guide the movement of the first valve stem, making the movement of the first valve stem more stable and reliable; the setting of the second valve stem guide hole can guide the second valve stem, making the movement of the second valve stem more stable and reliable.

[0045] Further, the reversing valve includes a first elastic member and a second elastic member, the first elastic member acts on the first valve stem so that the first valve stem has a tendency to move toward the first reversing port when the first opening and closing structure is away from the first reversing port; the second elastic member acts on the second valve stem so that the second valve stem has a tendency to move toward the third reversing port when the second opening and closing structure is away from the third reversing port.

[0046] By adopting the above structure, the structure of the reversing valve is more reasonable. If the user wants to move the first valve stem so that the first opening and closing structure moves toward the second reversing port side, the user needs to overcome the elastic force of the first elastic member, which can increase the operating feel; if the user wants to move the first valve stem so that the first opening and closing structure moves toward the first reversing port side, the user only needs to remove the force applied to the first valve stem, and the first valve stem will be reset under the action of the first elastic member, which can simplify the operation and facilitate user use, and the first elastic member can also ensure that the first opening and closing structure closes the first reversing port under normal conditions; the same applies to the second reset member.

[0047] Further, the first elastic member is a spring, a first stop block is provided at one end of the first valve stem where the first opening and closing structure is not provided, the first elastic member is sleeved on the first valve stem, and the first elastic member is located between the reversing layer and the first stop block;

[0048] The second elastic member is a spring, a second stop block is provided at one end of the second valve stem where the second opening and closing structure is not provided, the second elastic member is sleeved on the second valve stem, and the second elastic member is located between the reversing layer and the second stop block.

[0049] By adopting the above structure, the first elastic member and the second elastic member are more reasonable.

[0050] Further, the reversing valve includes an operating member for controlling the movement state of the first valve stem and the second valve stem, and the operating member controls the first valve stem and the second valve stem to synchronously close the first reversing port and the third reversing port, or synchronously close the second reversing port and the fourth reversing port.

[0051] That the operating member can control the first valve stem and the second valve stem can be understood as that the operating member can drive the first valve stem and the second valve stem to move to a certain motion state and / or the operating member can allow the first valve stem and the second valve stem to move to a certain motion state.

[0052] With the above structure, the setting of the operating member makes the structure of the reversing valve more reasonable. The user only needs to operate the operating member, and the operating member can synchronously control the first valve stem and the second valve stem, which simplifies the operation, is convenient and practical, and is easy to use with a handheld button to achieve unified and coordinated work.

[0053] Furthermore, the liquid injection device includes an operation button, and the operation button abuts against the operation member; the shell is provided with an operation button through hole for the operation button to pass through and be exposed.

[0054] With the above structure, the arrangement of the operating button can facilitate the user to operate the operating member.

[0055] Further, under the action of the first elastic member, the first valve stem has a tendency to move toward the first reversing port when the first opening and closing structure is away from the first reversing port; under the action of the second elastic member, the second valve stem has a tendency to move toward the third reversing port when the second opening and closing structure is away from the third reversing port;

[0056] The operating member includes an operating member body, which is arranged on the side of the first valve stem and the second valve stem where the first opening and closing structure and the second opening and closing structure are not arranged, and the movable direction of the operating member body is parallel to the axis of the first valve stem and the second valve stem; the first pressure rod and the second pressure rod are arranged on the operating member body, and the first pressure rod is arranged opposite to the first valve stem, and the second pressure rod is arranged opposite to the second valve stem.

[0057] With the above structure, when the user presses the operating member body, the first pressure rod and the second pressure rod can act on the first valve stem and the second valve stem to overcome the first elastic member and the second elastic member to realize the movement of the first opening and closing structure and the second opening and closing structure toward the second reversing port and the fourth reversing port; when the user removes the force applied to the operating member body, the force of the first pressure rod and the second pressure rod on the first valve stem and the second valve stem is also removed to allow the first valve stem and the second valve stem to move toward the reset side, and the first valve stem and the second valve stem are reset under the action of the first elastic member and the second elastic member; the reset of the first valve stem and the second valve stem will also drive the operating member to reset at the same time.

[0058] Furthermore, one end of the first valve stem and the second valve stem without the first opening and closing structure and the second opening and closing structure is located inside the valve body, and the valve body is provided with a first pressure rod operating hole matching the first pressure rod at a corresponding position of the first valve stem, and a second pressure rod operating hole matching the second pressure rod at a corresponding position of the second valve stem, the first pressure rod passes through the first pressure rod operating hole to control the first valve stem, and the second pressure rod passes through the second pressure rod operating hole to control the second valve stem.

[0059] By adopting the above structure, when the first valve stem and the second valve stem are arranged inside the valve body, the first pressure rod and the second pressure rod can still control the first valve stem and the second valve stem; and due to the setting of the first pressure rod operating hole and the second pressure rod operating hole, the movement of the first pressure rod and the second pressure rod can be guided, so that the movement of the first pressure rod and the second pressure rod is more stable and reliable; specifically, the first pressure rod is opposite to the first valve stem through the valve cover sealing gasket, and the second pressure rod is opposite to the second valve stem through the valve cover sealing gasket; specifically, the first pressure rod operating hole and the second pressure rod operating hole are arranged on the valve cover.

[0060] Furthermore, an operating guide rod is provided on the operating member body, an operating guide hole matching the operating guide rod is provided on the valve body, and the operating guide rod and the operating guide hole are extended along the movable direction of the operating member body.

[0061] With the above structure, the provision of the operation guide rod and the operation guide hole can guide the movement of the operating member, making the movement of the operating member more stable and reliable.

[0062] Further, the operation guide hole is arranged through the valve body, one end of the operation guide rod away from the operating member passes through the operation guide hole and is provided with a guide rod baffle, and the guide rod baffle cannot pass through the operation guide hole.

[0063] The above structure is adopted to facilitate the operation member to be movably arranged on the valve body, and avoid the separation of the two; specifically, the operation guide rod is provided with a guide rod baffle plate slot at the place where the guide rod baffle plate is provided, and the guide rod baffle plate is arranged and installed at the guide rod baffle plate slot; the operation guide hole includes a first operation guide hole section formed on the valve bottom, a second operation guide hole section formed on the valve bottom sealing gasket, a third operation guide hole section formed on the valve core body, a fourth operation guide hole section formed on the valve sealing gasket, a fifth operation guide hole section formed on the reversing layer, a sixth operation guide hole section formed on the valve cover sealing gasket, and a seventh operation guide hole section formed on the valve cover;

[0064] The first reversing cavity and the second reversing cavity are located on both sides of the center of the valve body, and the operation guide hole is arranged at the center of the valve body.

[0065] Furthermore, the reversing valve comprises a third elastic member, and two ends of the third elastic member respectively abut against the operating member body and the valve body.

[0066] With the above structure, the third elastic member is used for the reset operation of the operating member, and the structure is more reasonable.

[0067] Further, the first opening and closing structure includes a first sealing portion for opening and closing the first reversing port, and a second sealing portion for opening and closing the second reversing port, the first sealing portion is arranged toward the first reversing port and the diameter of the first sealing portion is larger than the aperture of the first reversing port, the second sealing portion is arranged toward the second reversing port and the diameter of the second sealing portion is larger than the aperture of the second reversing port, the first sealing portion and / or the first reversing port are surrounded by a sealing material, and the second sealing portion and / or the second reversing port are surrounded by a sealing material;

[0068] The second opening and closing structure includes a third sealing part for opening and closing the third reversing port, and a fourth sealing part for opening and closing the fourth reversing port, the third sealing part is arranged toward the third reversing port and the diameter of the third sealing part is larger than the aperture of the third reversing port, the fourth sealing part is arranged toward the fourth reversing port and the diameter of the fourth sealing part is larger than the aperture of the fourth reversing port, the third sealing part and / or the third reversing port are surrounded by sealing material, and the fourth sealing part and / or the fourth reversing port are surrounded by sealing material.

[0069] By adopting the above structure, the first opening and closing structure can open and close the first reversing port and the second reversing port, and the second opening and closing structure can open and close the third reversing port and the fourth reversing port; the above structure is reasonable. Specifically, the first reversing port and the third reversing port are arranged on the valve sealing gasket, so the periphery of the first reversing port and the periphery of the third reversing port are made of sealing material, and the third sealing part and the fourth sealing part are made of sealing material.

[0070] Further, a first protrusion is provided on the periphery of the first reversing port toward one side of the first sealing portion or the first sealing portion toward the first reversing port side, and the first protrusion is provided around the axis of the first reversing port; a second protrusion is provided on the periphery of the second reversing port toward one side of the second sealing portion or the second sealing portion toward the second reversing port side, and the second protrusion is provided around the axis of the second reversing port; a third protrusion is provided on the periphery of the third reversing port toward one side of the third sealing portion or the third sealing portion toward the third reversing port side, and the third protrusion is provided around the axis of the third reversing port; a fourth protrusion is provided on the periphery of the fourth reversing port toward one side of the fourth sealing portion or the fourth sealing portion toward the fourth reversing port side, and the fourth protrusion is provided around the axis of the fourth reversing port.

[0071] With the above structure, the first protrusion can increase the sealing effect of the first sealing part on the first reversing port, ensuring the closed state of the first reversing port; the second protrusion, the third protrusion and the fourth protrusion are the same; the above structure is reasonably designed.

[0072] Furthermore, a mounting hole is provided on the valve body.

[0073] With the above structure, the reversing valve can be installed and fixed through the installation hole; specifically, the installation hole is arranged at the bottom of the valve.

[0074] Furthermore, the injection device includes an operation button, a button detection device, and a control device, wherein the control device is connected to the power pump for controlling the working state of the power pump; the operation button is pressably arranged on the shell, and the operation button is used to control the working state of the reversing valve, and when the operation button is not pressed, the reversing valve is in the second working state, and when the operation button is pressed, the reversing valve is in the first working state; the button detection device is used to detect the pressing of the operation button and send a signal to the control device, and the control device controls the working state of the power pump according to the signal sent by the button detection device. Specifically, when the button detection device detects that the operation button is pressed, the control device controls the power pump to work according to the signal; when the button detection device detects that the operation button switches from being pressed to not being pressed, the control device controls the power pump to stop working after a delay setting time according to the signal, and the signal sent by the button detection device to the control device is a high and low level signal.

[0075] The above structure makes the injection device more reasonable and convenient for users to operate; when the user presses the operation button, the button detection device detects that the operation button is pressed and sends a signal to the control device, the control device controls the power pump to work, and the operation button simultaneously controls the reversing valve to be in the first working state, thereby realizing the injection operation; when the user stops pressing the operation button, the button detection device detects that the operation button stops being pressed and sends a signal to the control device, at which time the control device continues to control the power pump to work for a period of time and then stops, and the operation button simultaneously controls the reversing valve to be in the second working state, thereby realizing the recovery operation of the residual liquid in the pipeline while the power pump continues to work; the above structure is easy to operate and convenient for users to actually use; of course, the control device can be set to start the power pump only after the operation button is pressed for a certain period of time; specifically, the control device is a circuit board.

[0076] Furthermore, the injection device includes a power switch for controlling the opening and closing of the injection device, and a control device for controlling the opening and closing of the power pump; the power switch includes a power button connected to the control device, and a power button mounted on the power button; and the shell is provided with a power button through-hole for the power button to pass through and be exposed.

[0077] With the above structure, the power switch is provided to open and close the liquid injection device, which can prevent the operation button from being accidentally pressed and causing the liquid injection device to be mistakenly started.

[0078] Furthermore, the injection device includes a power indicator light, and the light-emitting side of the power indicator light is arranged toward the power button, and the power button is at least partially made of a light-transmitting or semi-light-transmitting material.

[0079] With the above structure, the power indicator light can be used to remind the user whether the injection device is turned on; specifically, when the power button is directly set on the control device and connected thereto, the power indicator light is set in the control device; when the power button is connected to the control device via a wire, the power button is set on a power button circuit board, and the power indicator light is set on the power button circuit board.

[0080] Furthermore, the liquid injection part and the liquid inlet part are respectively located at two ends of the shell.

[0081] By adopting the above structure, the arrangement of the liquid injection part and the liquid inlet part is more reasonable, which is convenient for users to use in practice.

[0082] Furthermore, the injection device comprises a frame, the reversing valve and the power pump are fixedly arranged on the frame, and the shell is sleeved on the outside of the frame.

[0083] The above structure makes the liquid injection device more reasonable, and the setting of the frame can effectively fix the components in the shell.

[0084] Specifically, the shell is formed by an overall cylindrical thin-walled tube, and the cylindrical shape is conducive to human hand gripping and hand-held operation; the maximum circumscribed circle diameter of the cross section of the shell is less than or equal to 60 mm.

[0085] Furthermore, the liquid injection device also includes a battery for powering the liquid injection device, and the battery is fixedly arranged inside the shell, and one or more batteries are provided.

[0086] The above structure makes the liquid injection device more reasonable, avoids the need for an external power supply when using it, and is convenient to use and move.

[0087] Furthermore, the liquid injection device also includes a lighting lamp structure, and the lighting lamp structure and the liquid injection piece are arranged on the same side of the shell.

[0088] With the above structure, the lighting structure is set so that the user can illuminate the surrounding environment when using it, so that the user can align the injection piece with the injection port of the container; it can also illuminate the inside of the container when injecting liquid into the container, so that the user can observe it.

[0089] Furthermore, the battery is a rechargeable battery, and the liquid injection device includes a charging interface for charging the battery.

[0090] The above structure makes the battery more reasonable, and the rechargeable battery can avoid users from frequently replacing batteries, which is convenient for practical use; specifically, the charging interface is a micro-USB interface, a lightning interface, or a type-C interface; the charging interface is arranged on the control device.

[0091] Furthermore, the charging interface and the liquid inlet are arranged on the same side of the shell.

[0092] The above structure makes the arrangement of the charging interface more reasonable, making it easier for users to plug in the charging cable.

[0093] Furthermore, the reversing valve, the power pump, and the battery are fixedly arranged in the frame, and the frame includes an upper frame and a lower frame.

[0094] The above structure makes the arrangement of the frame more reasonable and convenient for actual production and installation.

[0095] Furthermore, the liquid injection device includes a power indicator light for indicating the remaining power of the battery.

[0096] The above structure can remind the user of the remaining battery power and can remind the user to charge in time to avoid affecting subsequent use. Specifically, the power indicator light can indicate the remaining power through different colors; specifically, the power indicator light is formed as the power indicator light.

[0097] Compared with the prior art, the present invention has the following beneficial effects:

[0098] (1) The liquid injection device of the present invention is provided with a reversing valve so that when the liquid injection device stops injecting liquid, the internal pipeline thereof will be reversed, so that the liquid remaining in the internal pipeline can be reversely transported back to the liquid storage device, thereby preventing the liquid from remaining in the liquid injection device.

[0099] (2) The liquid injection device of the present invention makes the use of the liquid injection device more convenient by providing a lighting lamp bead and a power indicator light.

[0100] (3) The liquid injection device of the present invention has a reasonable structural design. BRIEF DESCRIPTION OF THE DRAWINGS

[0101] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0102] Figure 1This is a schematic diagram of the structure of a liquid injection device embodiment 1 of the present invention;

[0103] Figure 2 This is a schematic diagram of the explosion structure of the liquid injection device embodiment 1 of the present invention;

[0104] Figure 3 It is a cross-sectional view of Example 1 of the liquid injection device of the present invention;

[0105] Figure 4 It is a cross-sectional view of another direction of the embodiment 1 of the liquid injection device of the present invention;

[0106] Figure 5 It is a schematic diagram of the three-dimensional structure of the reversing valve in the embodiment 1 of the liquid injection device of the present invention;

[0107] Figure 6 It is a schematic diagram of the explosion structure of the reversing valve in Example 1 of the liquid injection device of the present invention;

[0108] Figure 7 It is a cross-sectional structural schematic diagram of the reversing valve in Example 1 of the liquid injection device of the present invention (the reversing valve is in the second working state);

[0109] Figure 8 for Figure 7 Enlarged view of point A in the middle;

[0110] Fig. 9 Schematic diagram of the cross-sectional structure of the reversing valve in Example 1 of the liquid injection device of the present invention (the reversing valve is in the first working state);

[0111] Fig.10 It is a schematic diagram of the internal structure of the valve core body in the reversing valve in the liquid injection device of the present invention;

[0112] Fig.11 It is a schematic diagram of the bottom surface structure of the valve core body in the reversing valve in the liquid injection device of the present invention;

[0113] Fig.12 It is a structural schematic diagram of a valve core in a reversing valve in a liquid injection device of the present invention;

[0114] Fig.13 It is a structural schematic diagram of the valve core and the reversing layer in the reversing valve in the liquid injection device of the present invention;

[0115] Fig.14 It is a structural schematic diagram of the valve core, the reversing layer and the valve cover sealing gasket in the reversing valve in the liquid injection device of the present invention;

[0116] Fig.15 It is a structural schematic diagram of a valve core, a reversing layer, a valve cover sealing gasket, and a valve cover in a reversing valve in a liquid injection device of the present invention;

[0117] Fig.16 This is a schematic diagram of the structure of a second embodiment of a liquid injection device according to the present invention;

[0118] Fig.17 This is a schematic diagram of the explosion structure of Example 2 of the liquid injection device of the present invention;

[0119] Fig.18 It is a cross-sectional view of Example 2 of the liquid injection device of the present invention;

[0120] Fig.19 It is a cross-sectional view in another direction of Embodiment 2 of the liquid injection device of the present invention;

[0121] Fig. 20 It is a schematic diagram of the three-dimensional structure of the reversing valve in Example 2 of the liquid injection device of the present invention;

[0122] Fig.21 It is a schematic diagram of the explosion structure of the reversing valve in Example 2 of the liquid injection device of the present invention;

[0123] Fig. 22 It is a schematic diagram of the explosion structure of the reversing valve in Embodiment 2 of the liquid injection device of the present invention at another angle;

[0124] Fig.23 Schematic diagram of the cross-sectional structure of the reversing valve in Example 2 of the liquid injection device of the present invention (the reversing valve is in the second working state);

[0125] Fig.24 for Fig.23 Enlarged view of point B in the middle;

[0126] Fig.25 Schematic diagram of the cross-sectional structure of the reversing valve in Example 2 of the liquid injection device of the present invention (the reversing valve is in the first working state);

[0127] Fig.26 This is a schematic diagram of the structure of a liquid injection device embodiment 3 of the present invention;

[0128] Fig. 27 It is a cross-sectional view of Example 3 of the liquid injection device of the present invention;

[0129] The names of the components corresponding to the various reference numerals in the figure are: 1. Shell; 1-1. Operation button through hole; 1-2. Power button through hole; 2. Reversing valve; 2-1. First connection port; 2-2. Second connection port; 2-3. Third connection port; 2-4. Fourth connection port; 2-5. Valve body; 2-5.1. First reversing cavity; 2-5.101. First reversing port; 2-5.102. Second reversing port; 2-5.2. Second reversing cavity; 2-5.201. Third reversing port; 2-5.202. Fourth reversing port; 2-5.3. First internal flow channel; 2-5.4. Second internal flow channel; 2-5.5. Third internal flow channel; 2-5.6. Fourth internal flow channel; 2-5.7. First channel; 2-5.70 1. First channel opening; 2-5.702, second channel opening; 2-5.703, first channel valve core body section; 2-5.704, first channel sealing gasket section; 2-5.8, second channel; 2-5.801, third channel opening; 2-5.802, fourth channel opening; 2-5.803, second channel valve core body section; 2-5.804, second channel sealing gasket section; 2-5.9, third channel; 2-5.901, third channel cross-sectional opening; 2-5.10, fourth channel; 2-5.1001, fourth channel cross-sectional opening; 2-5.11, fifth channel; 2-5.12, sixth channel; 2-5.13, valve bottom; 2-5.14, valve core; 2-5.1401, valve core body; 2-5 .1401a, first valve core cavity; 2-5.1401a1, first valve core upper cavity; 2-5.1401a11, first valve core upper opening; 2-5.1401a2, first valve core lower cavity; 2-5.1401b, second valve core cavity; 2-5.1401b1, second valve core upper cavity; 2-5.1401b11, second valve core upper opening; 2-5.1401b2, second valve core lower cavity; 2-5.1402, valve sealing gasket; 2-5.15, reversing layer; 2-5.1501, first valve stem guide hole; 2-5.1502, second valve stem guide hole; 2-5.16, valve cover; 2-5.17, valve bottom sealing gasket; 2-5.1701, first valve bottom sealing gasket channel; 2-5.1 702, second valve bottom sealing gasket channel; 2-5.18, valve cover sealing gasket; 2-5.1801, first sealing avoidance opening; 2-5.1802, second sealing avoidance opening; 2-5.1803, first membrane cavity; 2-5.1804, second membrane cavity; 2-5.19, first pressure rod operating hole; 2-5.20, second pressure rod operating hole; 2-5.21, operating guide hole; 2-5.2101, first operating guide hole section; 2-5.2102, second operating guide hole section; 2-5.2103, third operating guide hole section; 2-5.2104, fourth operating guide hole section; 2-5.2105, fifth operating guide hole section; 2-5.2106, sixth operating guide hole section; 2-5.2107, seventh operation guide hole section; 2-6, first valve stem; 2-6.1, first opening and closing structure; 2-6.101, first sealing part; 2-6.102, second sealing part; 2-6.2, first stop block; 2-7, second valve stem; 2-7.1, second opening and closing structure; 2-7.101, third sealing part; 2-7.102, fourth sealing part; 2-7.2, second stop block; 2-8, first elastic member; 2-9, second elastic member; 2-10, operating member; 2-10.1, operating member body; 2-10.2, first pressure rod; 2-10.3, second pressure rod; 2-10.4, operation guide rod; 2-10.401, guide rod baffle card slot; 2-10.5, guide rod baffle; 2-11, third elastic member; 2-12, first protrusion ;2-13, second protrusion;2-14, third protrusion;2-15, fourth protrusion;2-16, first connection channel;2-17, second connection channel;2-18, third connection channel;2-19, fourth connection channel;2-20, mounting hole;3, power pump;3-1, power pump liquid inlet end;3-2, power pump liquid outlet end;4, liquid inlet part;4-1, liquid inlet channel;5, liquid injection part;5-1, liquid injection channel;6, operation button;7, button detection device;8, control device;9, power switch;9-1, power button;9-2, power button;10, power indicator light;11, frame;11-1, upper frame;11-2, lower frame;12, battery;13, lighting structure;14, charging interface;15, power indicator light;16, power button circuit board. . DETAILED DESCRIPTION

[0130] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0131] Example 1

[0132] See also Figures 1 to 15The present invention provides a liquid injection device, comprising a housing 1, a reversing valve 2, a power pump 3, a liquid inlet member 4 having a liquid inlet channel 4-1, and a liquid injection member 5 having a liquid injection channel 5-1, wherein the reversing valve 2 and the power pump 3 are arranged in the housing 1, and the reversing valve 2 is provided with a first connecting port 2-1, a second connecting port 2-2, a third connecting port 2-3, and a fourth connecting port 2-4, and the reversing valve 2 has a first working state and a second working state, and when the reversing valve 2 is in the first working state, the first connecting port 2-1 is communicated with the third connecting port 2-3, and the second connecting port 2-2 is communicated with the third connecting port 2-3. The four connection ports 2-4 are connected. When the reversing valve 2 is in the second working state, the first connection port 2-1 is connected with the fourth connection port 2-4, and the second connection port 2-2 is connected with the third connection port 2-3; the power pump 3 has a power pump liquid inlet end 3-1 and a power pump liquid outlet end 3-2, the power pump liquid inlet end 3-1 is connected with the fourth connection port 2-4, the power pump liquid outlet end 3-2 is connected with the third connection port 2-3, the liquid inlet channel 4-1 of the liquid inlet part 4 is connected with the second connection port 2-2, and the injection channel 5-1 of the injection part 5 is connected with the first connection port 2-1.

[0133] When in use, the liquid inlet member 4 is connected to the liquid storage device through a suitable pipeline.

[0134] With the above structure, when the user needs to inject liquid, the user needs to align the injection piece 5 with the injection port of the container into which the liquid is to be injected, and operate the injection device so that the reversing valve 2 is in the first working state. At this time, the first connecting port 2-1 is connected with the third connecting port 2-3, and the second connecting port 2-2 is connected with the fourth connecting port 2-4, that is, the injection channel 5-1 of the injection piece 5 is connected with the power pump outlet end 3-2 of the power pump 3, and the liquid inlet channel 4-1 of the liquid inlet piece 4 is connected with the power pump inlet end 3-1 of the power pump 3. When the power pump 3 is working, the liquid flows from the liquid inlet channel 4-1 of the liquid inlet piece 4 via the power pump 3 to the injection channel 5-1 of the injection piece 5, and flows out from the injection channel 5-1 of the injection piece 5 to complete the injection.

[0135] When the user stops injecting liquid, the injection device is operated to put the reversing valve 2 in the second working state. At this time, the first connection port 2-1 is connected with the fourth connection port 2-4, and the second connection port 2-2 is connected with the third connection port 2-3; that is, the injection channel 5-1 of the injection member 5 is connected with the power pump inlet end 3-1 of the power pump 3, and the liquid inlet channel 4-1 of the liquid inlet member 4 is connected with the power pump outlet end 3-2 of the power pump 3. When the power pump 3 is working, the liquid flows from the injection channel 5-1 of the injection member 5 via the power pump 3 to the liquid inlet channel 4-1 of the liquid inlet member 4, and flows back from the injection channel 5-1 of the injection member 5 to the liquid storage device;

[0136] The above structure enables the user to transport the residual liquid in the internal pipeline back to the liquid storage device when stopping the injection, so as to avoid the liquid remaining in the injection device, thereby preventing the injection device from moving and the liquid from flowing out.

[0137] See also Figures 5 to 15 , further, the reversing valve 2 includes a valve body 2-5, and a first valve stem 2-6 and a second valve stem 2-7, the valve body 2-5 is provided with a first connection port 2-1 and a second connection port 2-2, and a third connection port 2-3 and a fourth connection port 2-4, the valve body 2-5 is provided with a first reversing cavity 2-5.1 and a second reversing cavity 2-5.2, the first connection port 2-1 is communicated with the first reversing cavity 2-5.1, and the second connection port 2-2 is communicated with the second reversing cavity 2-5.2;

[0138] The first valve stem 2-6 is movably arranged on the valve body 2-5, and the first reversing cavity 2-5.1 is provided with a first reversing port 2-5.101 and a second reversing port 2-5.102 in the moving direction of the first valve stem 2-6, and the first reversing port 2-5.101 is connected with the third connecting port 2-3 through the first internal flow channel 2-5.3, and the second reversing port 2-5.102 is connected with the fourth connecting port 2-4 through the second internal flow channel 2-5.4; the first valve One end of the rod 2-6 is located in the first reversing cavity 2-5.1 and is provided with a first opening and closing structure 2-6.1, and the first opening and closing structure 2-6.1 closes the first reversing port 2-5.101 and opens the second reversing port 2-5.102 when approaching the first reversing port 2-5.101, and the first opening and closing structure 2-6.1 closes the second reversing port 2-5.102 and opens the first reversing port 2-5.101 when approaching the second reversing port 2-5.102;

[0139] The second valve stem 2-7 is movably arranged on the valve body 2-5, and the second reversing cavity 2-5.2 is provided with a third reversing port 2-5.201 and a fourth reversing port 2-5.202 in the moving direction of the second valve stem 2-7, and the third reversing port 2-5.201 is connected with the fourth connecting port 2-4 through a third internal flow channel 2-5.5, and the fourth reversing port 2-5.202 is connected with the third connecting port 2-3 through a fourth internal flow channel 2-5.6; the second valve One end of the rod 2-7 is located in the second reversing cavity 2-5.2 and is provided with a second opening and closing structure 2-7.1. The second opening and closing structure 2-7.1 closes the third reversing port 2-5.201 and opens the fourth reversing port 2-5.202 when it is close to the third reversing port 2-5.201, and the second opening and closing structure 2-7.1 closes the fourth reversing port 2-5.202 and opens the third reversing port 2-5.201 when it is close to the fourth reversing port 2-5.202.

[0140] With the above structure, when the first valve stem 2-6 moves so that the first opening and closing structure 2-6.1 closes the first reversing port 2-5.101, and the second valve stem 2-7 moves so that the second opening and closing structure 2-7.1 closes the third reversing port 2-5.201, the first connecting port 2-1 is connected to the fourth connecting port 2-4 through the first reversing cavity 2-5.1, the second reversing port 2-5.102 of the first reversing cavity 2-5.1, and the second internal flow channel 2-5.4, and the second connecting port 2-2 is connected to the third connecting port 2-3 through the second reversing cavity 2-5.2, the fourth reversing port 2-5.202 of the second reversing cavity 2-5.2, and the fourth internal flow channel 2-5.6. At this time, the reversing valve 2 is in the second working state;

[0141] When the first valve stem 2-6 moves so that the first opening and closing structure 2-6.1 closes the second reversing port 2-5.102, and the second valve stem 2-7 moves so that the second opening and closing structure 2-7.1 closes the fourth reversing port 2-5.202, the first connecting port 2-1 is connected to the third connecting port 2-3 through the first reversing cavity 2-5.1, the first reversing port 2-5.101 of the first reversing cavity 2-5.1, and the first internal flow channel 2-5.3, and the second connecting port 2-2 is connected to the fourth connecting port 2-4 through the second reversing cavity 2-5.2, the third reversing port 2-5.201 of the second reversing cavity 2-5.2, and the third internal flow channel 2-5.5. At this time, the reversing valve 2 is in the first working state;

[0142] Therefore, the user only needs to simply operate the first valve stem 2-6 and the second valve stem 2-7 to achieve the switching operation. The above structure is simple and can reduce the overall volume, that is, the required installation space is small, so that the injection device can be miniaturized and convenient for users to hold.

[0143] Specifically, the valve body 2-5 is provided with a first connecting channel 2-16, a second connecting channel 2-17, a third connecting channel 2-18 and a fourth connecting channel 2-19, the end of the first connecting channel 2-16 facing the outside is formed as the first connecting port 2-1, the end of the second connecting channel 2-17 facing the outside is formed as the second connecting port 2-2, the end of the third connecting channel 2-18 facing the outside is formed as the third connecting port 2-3, and the end of the fourth connecting channel 2-19 facing the outside is formed as the fourth connecting port 2-4. The first connection port 2-1 is connected to the first reversing cavity 2-5.1 through the first connection channel 2-16, the second connection port 2-2 is connected to the second reversing cavity 2-5.2 through the second connection channel 2-17, the first internal flow channel 2-5.3 and the fourth internal flow channel 2-5.6 are connected to the third connection port 2-3 through the third connection channel 2-18, and the second internal flow channel 2-5.4 and the third internal flow channel 2-5.5 are connected to the fourth connection port 2-4 through the fourth connection channel 2-19.

[0144] See also Figures 7 to 9 , further, the axis of the first valve stem 2-6 is parallel to the axis of the second valve stem 2-7; and the direction from the first reversing port 2-5.101 to the second reversing port 2-5.102 is consistent with the direction from the third reversing port 2-5.201 to the fourth reversing port 2-5.202.

[0145] The above structure makes the structure of the reversing valve 2 more reasonable, and facilitates the synchronous operation of the first valve stem 2-6 and the second valve stem 2-7.

[0146] See also Figures 10 to 15Further, the valve body 2-5 includes a first channel 2-5.7, a second channel 2-5.8, a third channel 2-5.9, a fourth channel 2-5.10, a fifth channel 2-5.11 and a sixth channel 2-5.12, the first channel 2-5.7 has an extension distance in a direction parallel to the axis of the first valve stem 2-6, and the two ends of the first channel 2-5.7 are formed as a first channel opening 2-5.701 and a second channel opening 2-5.702, and the first channel opening 2-5.701 to the second channel opening 2-5.702 The direction of the second reversing port 2-5.101 is consistent with the direction of the first reversing port 2-5.102; the second channel 2-5.8 has an extension distance in a direction parallel to the axis of the second valve stem 2-7, and the two ends of the second channel 2-5.8 are formed as a third channel port 2-5.801 and a fourth channel port 2-5.802, and the direction of the third channel port 2-5.801 to the fourth channel port 2-5.802 is consistent with the direction of the third reversing port 2-5.201 to the fourth reversing port 2-5.202;

[0147] The third channel 2-5.9 is arranged between the second channel port 2-5.702 and the second reversing port 2-5.102 and connects the second channel port 2-5.702 with the second reversing port 2-5.102, and the fourth channel 2-5.10 is arranged between the fourth channel port 2-5.802 and the fourth reversing port 2-5.202 and connects the fourth channel port 2-5.802 with the fourth reversing port 2-5.202;

[0148] The fifth channel 2-5.11 is used to connect the first reversing port 2-5.101, the third channel port 2-5.801 and the third connecting port 2-3, and the sixth channel 2-5.12 is used to connect the third reversing port 2-5.201, the first channel port 2-5.701 and the fourth connecting port 2-4.

[0149] Specifically, the fifth channel 2-5.11 or part thereof is formed as the first internal flow channel 2-5.3; the third channel 2-5.9, the first channel 2-5.7, the sixth channel 2-5.12 or part thereof is formed as the second internal flow channel 2-5.4; the sixth channel 2-5.12 or part thereof is formed as the third internal flow channel 2-5.5, and the fourth channel 2-5.10, the second channel 2-5.8, the fifth channel 2-5.11 or part thereof is formed as the fourth internal flow channel 2-5.6.

[0150] The above structure makes the design of the reversing valve 2 more reasonable. The internal flow channel of the valve body 2-5 is arranged in a three-dimensional space, which can further reduce the volume of the reversing valve 2, that is, further reduce the space required for its installation; and the fifth channel 2-5.11 or a part thereof is a common part of the first internal flow channel 2-5.3 and the fourth internal flow channel 2-5.6, and the sixth channel 2-5.12 or a part thereof is a common part of the second internal flow channel 2-5.4 and the third internal flow channel 2-5.5. The internal flow channel of the valve body 2-5 is optimized to simplify the structure, which is not only conducive to the small volume of the valve body 2-5, but also reduces the difficulty of processing the valve body 2-5;

[0151] The above structure makes it easier to reduce the size of the reversing valve 2, thereby making the liquid injection device more miniaturized and convenient for users to hold.

[0152] See also Figure 6 Further, the valve body 2-5 includes a valve bottom 2-5.13, a valve core 2-5.14, a reversing layer 2-5.15, and a valve cover 2-5.16; the valve core 2-5.14 is located on one side of the valve bottom 2-5.13, the reversing layer 2-5.15 is arranged on the side of the valve core 2-5.14 away from the valve bottom 2-5.13, the valve cover 2-5.16 is arranged on the side of the reversing layer 2-5.15 away from the valve core 2-5.14, the valve core 2-5.14 is provided with the first reversing cavity 2-5.1, the second reversing cavity 2-5.2, the first channel 2-5.7, the second channel 2-5.8, the The third channel 2-5.9 and the fourth channel 2-5.10, the reversing layer 2-5.15 is provided with the fifth channel 2-5.11 and the sixth channel 2-5.12; the first connecting port 2-1 and the second connecting port 2-2 are arranged on the valve core 2-5.14, the third connecting port 2-3 and the fourth connecting port 2-4 are arranged on the valve cover 2-5.16, the first reversing port 2-5.101 and the third reversing port 2-5.201 are arranged close to the reversing layer 2-5.15, and the second reversing port 2-5.102 and the fourth reversing port 2-5.202 are arranged close to the valve bottom 2-5.13.

[0153] The above structure makes the structure of the valve body 2-5 more reasonable, and the internal flow channel is formed by stacking the layered structure, which is convenient for production, processing and installation.

[0154] See also Figures 7 to 9Further, the valve core 2-5.14 includes a valve core body 2-5.1401 and a valve sealing gasket 2-5.1402, the valve core body 2-5.1401 is arranged on the valve bottom 2-5.13, the valve sealing gasket 2-5.1402 is arranged on the side of the valve core body 2-5.1401 away from the valve bottom 2-5.13, and the valve core body 2-5.1401 is provided with a first valve core cavity 2-5.1401a and a second valve core cavity 2-5.1401b;

[0155] The first valve core chamber 2-5.1401a includes a first valve core upper chamber 2-5.1401a1 disposed away from the valve bottom 2-5.13, and a first valve core lower chamber 2-5.1401a2 disposed close to the valve bottom 2-5.13, one end of the first valve core upper chamber 2-5.1401a1 away from the first valve core lower chamber 2-5.1401a2 is formed as a first valve core upper opening 2-5.1401a11, and the valve sealing gasket 2-5.1402 is provided with the first reversing port 2-5.101 at the first valve core upper opening 2-5.1401a11, and the first reversing port 2-5.10 1 is communicated with the first valve core upper opening 2-5.1401a11, the first valve core upper chamber 2-5.1401a1 is communicated with the first valve core lower chamber 2-5.1401a2 and the second reversing port 2-5.102 is formed at the communicating position, the first valve core upper chamber 2-5.1401a1 and the valve sealing gasket 2-5.1402 covering the first valve core upper opening 2-5.1401a11 are enclosed to form the first reversing chamber 2-5.1, the first valve core lower chamber 2-5.1401a2 extends to the first channel 2-5.7 side and is communicated with it to form the third channel 2-5.9;

[0156] The second valve core chamber 2-5.1401b includes a second valve core upper chamber 2-5.1401b1 arranged away from the valve bottom 2-5.13, and a second valve core lower chamber 2-5.1401b2 arranged close to the valve bottom 2-5.13, and one end of the second valve core upper chamber 2-5.1401b1 away from the second valve core lower chamber 2-5.1401b2 is formed as a second valve core upper opening 2-5.1401b11, and the valve sealing gasket 2-5.1402 is provided with the third reversing port 2-5.201 at the second valve core upper opening 2-5.1401b11, and the third reversing port 2-5.20 1 is communicated with the second valve core upper opening 2-5.1401b11, the second valve core upper chamber 2-5.1401b1 is communicated with the second valve core lower chamber 2-5.1401b2 and the fourth reversing port 2-5.202 is formed at the communicating position, the second valve core upper chamber 2-5.1401b1 and the valve sealing gasket 2-5.1402 covering the second valve core upper opening 2-5.1401b11 are enclosed to form the second reversing chamber 2-5.2, the second valve core lower chamber 2-5.1401b2 extends toward the second channel 2-5.8 and is communicated with it to form the fourth channel 2-5.10;

[0157] The first channel 2-5.7 includes a first channel valve core body section 2-5.703 formed on the valve core body 2-5.1401, and a first channel sealing gasket section 2-5.704 formed on the valve sealing gasket 2-5.1402; the second channel 2-5.8 includes a second channel valve core body section 2-5.803 formed on the valve core body 2-5.1401, and a second channel sealing gasket section 2-5.804 formed on the valve sealing gasket 2-5.1402.

[0158] By adopting the above structure, the valve core 2-5.14 is further divided into layers and modules, which is convenient for processing the channel in the valve core 2-5.14; and the valve sealing gasket 2-5.1402 adopts sealing material, specifically flexible material, which can increase the sealing type between the valve core 2-5.14 and the reversing layer 2-5.15 after installation to avoid leakage; the functions are integrated and the structure is further simplified to reduce the final volume of the reversing valve 2.

[0159] See also Figures 6 to 9Further, the reversing valve 2 includes a valve bottom sealing gasket 2-5.17 arranged between the valve bottom 2-5.13 and the valve core 2-5.14; the third channel 2-5.9 is formed with a third channel cross-sectional opening 2-5.901 on the end surface of the valve core 2-5.14 facing the valve bottom 2-5.13 on one side thereof, and the fourth channel 2-5.10 is formed with a fourth channel cross-sectional opening 2-5.1001 on the end surface of the valve core 2-5.14 facing the valve bottom 2-5.13 on one side thereof.

[0160] The above structure is adopted to facilitate the actual processing of the third channel 2-5.9 and the fourth channel 2-5.10, and the valve bottom sealing gasket 2-5.17 is provided to achieve a better sealing effect between the valve core 2-5.14 and the valve bottom 2-5.13. The above structure is reasonable; the valve bottom sealing gasket 2-5.17 adopts sealing material, specifically flexible material.

[0161] Furthermore, the end surface of the valve bottom sealing gasket 2-5.17 facing the valve core 2-5.14 is arranged in a complete plane.

[0162] With the above structure, the valve bottom sealing gasket 2-5.17 can better ensure the sealing between the valve core 2-5.14 and the valve bottom 2-5.13.

[0163] See also Figures 6 to 9 Further, the reversing valve 2 includes a valve cover sealing gasket 2-5.18 arranged between the reversing layer 2-5.15 and the valve cover 2-5.16, and the valve cover sealing gasket 2-5.18 has a first sealing avoidance opening 2-5.1801 at the connection between the fifth channel 2-5.11 and the third connecting port 2-3, and the valve cover sealing gasket 2-5.18 has a second sealing avoidance opening 2-5.1802 at the connection between the sixth channel 2-5.12 and the fourth connecting port 2-4.

[0164] With the above structure, the setting of the valve cover sealing gasket 2-5.18 can ensure the sealing effect between the reversing layer 2-5.15 and the valve cover 2-5.16, and the setting of the first sealing avoidance opening 2-5.1801 and the second sealing avoidance opening 2-5.1802 enables the fifth channel 2-5.11 to be connected with the third connecting port 2-3 through the first sealing avoidance opening 2-5.1801, and the sixth channel 2-5.12 to be connected with the fourth connecting port 2-4 through the second sealing avoidance opening 2-5.1802; the above structure is reasonable, and the valve cover sealing gasket 2-5.18 adopts sealing material, specifically flexible material.

[0165] See also Figures 7 to 9 Furthermore, the valve cover sealing gasket 2-5.18 protrudes away from the reversing layer 2-5.15 at the first valve stem 2-6 and the second valve stem 2-7 to form a first membrane cavity 2-5.1803 and a second membrane cavity 2-5.1804, and the reversing layer 2-5.15 is respectively provided with a first valve stem guide hole 2-5.1501 and a second valve stem guide hole 2-5.1502 at the first valve stem 2-6 and the second valve stem 2-7, one end of the first valve stem 2-6 without the first opening and closing structure 2-6.1 passes through the first valve stem guide hole 2-5.1501 and is located in the first membrane cavity 2-5.1803, and one end of the second valve stem 2-7 without the second opening and closing structure 2-7.1 passes through the second valve stem guide hole 2-5.1502 and is located in the second membrane cavity 2-5.1804.

[0166] With the above structure, the first membrane cavity 2-5.1803 and the second membrane cavity 2-5.1804 are arranged so that the first valve stem 2-6 and the second valve stem 2-7 are completely arranged inside the valve body 2-5, and the sealing performance is better. Even if the sealing performance of the first valve stem 2-6 and the second valve stem 2-7 decreases after long-term use, the leakage caused is the internal leakage between the first connection port 2-1, the second connection port 2-2, the third connection port 2-3 and the fourth connection port 2-4, and there will be no leakage to the outside, which is safer.

[0167] Moreover, the setting of the first valve stem guide hole 2-5.1501 can guide the movement of the first valve stem 2-6, making the movement of the first valve stem 2-6 more stable and reliable; the setting of the second valve stem guide hole 2-5.1502 can guide the second valve stem 2-7, making the movement of the second valve stem 2-7 more stable and reliable.

[0168] Furthermore, the reversing valve 2 includes a first elastic member 2-8 and a second elastic member 2-9, and the first elastic member 2-8 acts on the first valve stem 2-6 so that the first valve stem 2-6 has a tendency to move toward the first reversing port 2-5.101 when the first opening and closing structure 2-6.1 is away from the first reversing port 2-5.101; the second elastic member 2-9 acts on the second valve stem 2-7 so that the second valve stem 2-7 has a tendency to move toward the third reversing port 2-5.201 when the second opening and closing structure 2-7.1 is away from the third reversing port 2-5.201.

[0169] The above structure makes the structure of the reversing valve 2 more reasonable. If the user wants to move the first valve stem 2-6 so that the first opening and closing structure 2-6.1 moves toward the second reversing port 2-5.102, the elastic force of the first elastic member 2-8 needs to be overcome, which can increase the operating feel. If the user wants to move the first valve stem 2-6 so that the first opening and closing structure 2-6.1 moves toward the first reversing port 2-5.101, the user only needs to remove the force applied to the first valve stem 2-6. The first valve stem 2-6 will be reset under the action of the first elastic member 2-8, which can simplify the operation and facilitate user use. The first elastic member 2-8 can also ensure that the first opening and closing structure 2-6.1 closes the first reversing port 2-5.101 under normal conditions. The same applies to the second reset member.

[0170] Further, the first elastic member 2-8 is a spring, the end of the first valve stem 2-6 not provided with the first opening and closing structure 2-6.1 is provided with a first stop block 2-6.2, the first elastic member 2-8 is sleeved on the first valve stem 2-6, and the first elastic member 2-8 is located between the reversing layer 2-5.15 and the first stop block 2-6.2;

[0171] The second elastic member 2-9 is a spring, and a second stop block 2-7.2 is provided at one end of the second valve stem 2-7 where the second opening and closing structure 2-7.1 is not provided. The second elastic member 2-9 is sleeved on the second valve stem 2-7, and the second elastic member 2-9 is located between the reversing layer 2-5.15 and the second stop block 2-7.2.

[0172] The above structure makes the first elastic member 2-8 and the second elastic member 2-9 more reasonable.

[0173] See also Figures 6 to 9 Further, the reversing valve 2 includes an operating member 2-10 for controlling the movement state of the first valve stem 2-6 and the second valve stem 2-7, and the operating member 2-10 controls the first valve stem 2-6 and the second valve stem 2-7 to synchronously close the first reversing port 2-5.101 and the third reversing port 2-5.201, or synchronously close the second reversing port 2-5.102 and the fourth reversing port 2-5.202.

[0174] The fact that the operating member 2-10 can control the first valve stem 2-6 and the second valve stem 2-7 can be understood as follows: the operating member 2-10 can drive the first valve stem 2-6 and the second valve stem 2-7 to move to a certain motion state and / or the operating member 2-10 can allow the first valve stem 2-6 and the second valve stem 2-7 to move to a certain motion state.

[0175] With the above structure, the setting of the operating part 2-10 makes the structure of the reversing valve 2 more reasonable. The user only needs to operate the operating part 2-10. The operating part 2-10 can synchronously control the first valve stem 2-6 and the second valve stem 2-7, which simplifies the operation, is convenient and practical, and is easy to use with a handheld button to achieve unified and coordinated work.

[0176] See also Figures 2 to 4 Furthermore, the injection device includes an operation button 6, and the operation button 6 is against the operation member 2-10; the shell 1 is provided with an operation button through hole 1-1 for the operation button 6 to pass through and be exposed.

[0177] With the above structure, the setting of the operating button 6 can facilitate the user to operate the operating member 2 - 10.

[0178] See also Figures 6 to 9 Further, the first valve stem 2-6, under the action of the first elastic member 2-8, has a tendency to move toward the first reversing port 2-5.101 when the first opening and closing structure 2-6.1 is away from the first reversing port 2-5.101; the second valve stem 2-7, under the action of the second elastic member 2-9, has a tendency to move toward the third reversing port 2-5.201 when the second opening and closing structure 2-7.1 is away from the third reversing port 2-5.201;

[0179] The operating member 2-10 includes an operating member body 2-10.1, and the operating member body 2-10.1 is arranged on the side of the first valve stem 2-6 and the second valve stem 2-7 where the first opening and closing structure 2-6.1 and the second opening and closing structure 2-7.1 are not arranged, and the moving direction of the operating member body 2-10.1 is parallel to the axis of the first valve stem 2-6 and the second valve stem 2-7; the first pressure rod 2-10.2 and the second pressure rod 2-10.3 are arranged on the operating member body 2-10.1, and the first pressure rod 2-10.2 is arranged opposite to the first valve stem 2-6, and the second pressure rod 2-10.3 is arranged opposite to the second valve stem 2-7.

[0180] With the above structure, when the user presses the operating member body 2-10.1, the first pressure rod 2-10.2 and the second pressure rod 2-10.3 can act on the first valve stem 2-6 and the second valve stem 2-7 to overcome the first elastic member 2-8 and the second elastic member 2-9 to realize the first opening and closing structure 2-6.1 and the second opening and closing structure 2-7.1 to move toward the second reversing port 2-5.102 and the fourth reversing port 2-5.202; when the user removes the pressure applied to the operating member body 2 -10.1, the forces exerted by the first pressure rod 2-10.2 and the second pressure rod 2-10.3 on the first valve stem 2-6 and the second valve stem 2-7 are also removed to allow the first valve stem 2-6 and the second valve stem 2-7 to move toward the reset side, and the first valve stem 2-6 and the second valve stem 2-7 are reset under the action of the first elastic member 2-8 and the second elastic member 2-9; the reset of the first valve stem 2-6 and the second valve stem 2-7 will also drive the reset of the operating member 2-10.

[0181] See also Figures 7 to 9 Furthermore, the first valve stem 2-6 and the second valve stem 2-7 are not provided with the first opening and closing structure 2-6.1 and one end of the second opening and closing structure 2-7.1 is located inside the valve body 2-5, and the valve body 2-5 is provided with a first pressure rod operating hole 2-5.19 matching the first pressure rod 2-10.2 at the corresponding position of the first valve stem 2-6, and a second pressure rod operating hole 2-5.20 matching the second pressure rod 2-10.3 is provided at the corresponding position of the second valve stem 2-7, the first pressure rod 2-10.2 passes through the first pressure rod operating hole 2-5.19 to control the first valve stem 2-6, and the second pressure rod 2-10.3 passes through the second pressure rod operating hole 2-5.20 to control the second valve stem 2-7.

[0182] By adopting the above structure, when the first valve stem 2-6 and the second valve stem 2-7 are arranged inside the valve body 2-5, the first pressure rod 2-10.2 and the second pressure rod 2-10.3 can still control the first valve stem 2-6 and the second valve stem 2-7; and due to the arrangement of the first pressure rod operating hole 2-5.19 and the second pressure rod operating hole 2-5.20, the movement of the first pressure rod 2-10.2 and the second pressure rod 2-10.3 can be guided. , making the activities of the first pressure rod 2-10.2 and the second pressure rod 2-10.3 more stable and reliable; specifically, the first pressure rod 2-10.2 is opposite to the first valve stem 2-6 across the valve cover sealing gasket 2-5.18, and the second pressure rod 2-10.3 is opposite to the second valve stem 2-7 across the valve cover sealing gasket 2-5.18; specifically, the first pressure rod operating hole 2-5.19 and the second pressure rod operating hole 2-5.20 are arranged on the valve cover 2-5.16.

[0183] Further, the first opening and closing structure 2-6.1 includes a first sealing portion 2-6.101 for opening and closing the first reversing port 2-5.101, and a second sealing portion 2-6.102 for opening and closing the second reversing port 2-5.102, the first sealing portion 2-6.101 is arranged toward the first reversing port 2-5.101 and the diameter of the first sealing portion 2-6.101 is larger than the aperture of the first reversing port 2-5.101, the second sealing portion 2-6.102 is arranged toward the second reversing port 2-5.102 and the diameter of the second sealing portion 2-6.102 is larger than the aperture of the second reversing port 2-5.102, the first sealing portion 2-6.101 and / or the first reversing port 2-5.101 are surrounded by sealing material, and the second sealing portion 2-6.102 and / or the second reversing port 2-5.102 are surrounded by sealing material;

[0184] The second opening and closing structure 2-7.1 includes a third sealing part 2-7.101 for opening and closing the third reversing port 2-5.201, and a fourth sealing part 2-7.102 for opening and closing the fourth reversing port 2-5.202. The third sealing part 2-7.101 is arranged toward the third reversing port 2-5.201 and the diameter of the third sealing part 2-7.101 is larger than the aperture of the third reversing port 2-5.201. The fourth sealing part 2-7.102 is arranged toward the fourth reversing port 2-5.202 and the diameter of the fourth sealing part 2-7.102 is larger than the aperture of the fourth reversing port 2-5.202. The third sealing part 2-7.101 and / or the third reversing port 2-5.201 are surrounded by sealing materials, and the fourth sealing part 2-7.102 and / or the fourth reversing port 2-5.202 are surrounded by sealing materials.

[0185] The above structure is adopted to realize the opening and closing of the first reversing port 2-5.101 and the second reversing port 2-5.102 by the first opening and closing structure 2-6.1, and the opening and closing of the third reversing port 2-5.201 and the fourth reversing port 2-5.202 by the second opening and closing structure 2-7.1; the above structure is reasonable. Specifically, the first reversing port 2-5.101 and the third reversing port 2-5.201 are arranged on the valve sealing gasket 2-5.1402, so the periphery of the first reversing port 2-5.101 and the periphery of the third reversing port 2-5.201 are sealed with sealing materials, and the third sealing part 2-7.101 and the fourth sealing part 2-7.102 are sealed with sealing materials.

[0186] See also Figures 7 to 9Further, a first protrusion 2-12 is provided on the periphery of the first reversing port 2-5.101 toward one side of the first sealing portion 2-6.101 or the first sealing portion 2-6.101 is protruded toward the side of the first reversing port 2-5.101, and the first protrusion 2-12 is provided around the axis of the first reversing port 2-5.101; a second protrusion 2-13 is provided on the periphery of the second reversing port 2-5.102 toward one side of the second sealing portion 2-6.102 or the second sealing portion 2-6.102 is protruded toward the side of the second reversing port 2-5.102, and the second protrusion 2-13 is provided around the axis of the second reversing port 2-5.102. Setting: a third protrusion 2-14 is set on the periphery of the third reversing port 2-5.201 toward one side of the third sealing part 2-7.101 or the third sealing part 2-7.101 is protruding toward the side of the third reversing port 2-5.201, and the third protrusion 2-14 is set around the axis of the third reversing port 2-5.201; a fourth protrusion 2-15 is set on the periphery of the fourth reversing port 2-5.202 toward one side of the fourth sealing part 2-7.102 or the fourth sealing part 2-7.102 is protruding toward the side of the fourth reversing port 2-5.202, and the fourth protrusion 2-15 is set around the axis of the fourth reversing port 2-5.202.

[0187] With the above structure, the first protrusion 2-12 can increase the sealing effect of the first sealing part 2-6.101 on the first reversing port 2-5.101, ensuring the closed state of the first reversing port 2-5.101; the second protrusion 2-13, the third protrusion 2-14, and the fourth protrusion 2-15 are the same; the above structure is reasonably designed.

[0188] Furthermore, a mounting hole 2-20 is provided on the valve body 2-5.

[0189] By adopting the above structure, the reversing valve 2 can be installed and fixed through the mounting hole 2-20; specifically, the mounting hole 2-20 is arranged at the valve bottom 2-5.13.

[0190] See also Figures 1 to 4, further, the injection device includes an operation button 6, a button detection device 7, and a control device 8, the control device 8 is connected to the power pump 3 for controlling the working state of the power pump 3; the operation button 6 is pressably arranged on the housing 1, the operation button 6 is used to control the working state of the reversing valve 2, and when the operation button 6 is not pressed, the reversing valve 2 is in the second working state, and when the operation button 6 is pressed, the reversing valve 2 is in the first working state; the button detection device 7 is used to detect the pressing of the operation button 6 and send a signal to the control device 8, the control device 8 controls the working state of the power pump 3 according to the signal sent by the button detection device 7, specifically, when the button detection device 7 detects that the operation button 6 is pressed, the control device 8 controls the power pump 3 to work according to the signal; when the button detection device 7 detects that the operation button 6 switches from being pressed to not being pressed, the control device 8 controls the power pump 3 to stop working after a set time according to the signal, and the signal sent by the button detection device 7 to the control device 8 is a high and low level signal.

[0191] The above structure makes the injection device more reasonable and convenient for users to operate. When the user presses the operation button 6, the button detection device 7 detects that the operation button 6 is pressed and sends a signal to the control device 8. The control device 8 controls the power pump 3 to work, and the operation button 6 will also control the reversing valve 2 to be in the first working state, thereby realizing the injection operation. When the user stops pressing the operation button 6, the button detection device 7 detects that the operation button 6 stops being pressed and sends a signal to the control device 8. At this time, the control device 8 will continue to control the power pump 3 to work for a period of time and then stop, and the operation button 6 will also control the reversing valve 2 to be in the second working state, so that the residual liquid in the pipeline can be recovered while the power pump 3 continues to work. The above structure is easy to operate and convenient for users to use. Of course, the control device 8 can be set to start the power pump 3 only after the operation button 6 is pressed for a certain period of time. Specifically, the control device 8 is a circuit board.

[0192] See also Figure 1 to Figure 2 Furthermore, the liquid injection part 5 and the liquid inlet part 4 are respectively located at two ends of the shell 1.

[0193] The above structure makes the arrangement of the liquid injection part 5 and the liquid inlet part 4 more reasonable, which is convenient for users to use in practice.

[0194] See also Figures 1 to 4Furthermore, the injection device includes a skeleton 11, the reversing valve 2 and the power pump 3 are fixedly arranged on the skeleton 11, and the housing 1 is sleeved on the outside of the skeleton 11.

[0195] The above structure makes the liquid injection device more reasonable, and the arrangement of the frame 11 can effectively fix the components in the housing 1 .

[0196] Specifically, the shell 1 is formed by an overall cylindrical thin-walled tube, and the cylindrical shape is conducive to human hand gripping and hand-held operation; the maximum circumscribed circle diameter of the cross section of the shell 1 is less than or equal to 60 mm.

[0197] See also Figures 1 to 3 Furthermore, the liquid injection device also includes a battery 12 for powering the liquid injection device. The battery 12 is fixedly arranged inside the shell 1. In this embodiment, the battery 12 is provided with one.

[0198] The above structure makes the liquid injection device more reasonable, avoids the need for an external power supply when using it, and is convenient to use and move.

[0199] Furthermore, the battery 12 is a rechargeable battery, and the liquid injection device includes a charging interface 14 for charging the battery 12 .

[0200] The above structure makes the battery 12 more reasonable, and the rechargeable battery 12 can avoid users from frequently replacing the battery 12, which is convenient for practical use; specifically, the charging interface 14 is a micro-USB interface or a lightning interface or a type-C interface; the charging interface 14 is arranged on the control device 8.

[0201] Furthermore, the charging interface 14 and the liquid inlet 4 are arranged on the same side of the housing 1 .

[0202] The above structure makes the arrangement of the charging interface 14 more reasonable, making it easier for users to plug in the charging cable.

[0203] Furthermore, the reversing valve 2, the power pump 3, and the battery 12 are fixedly arranged in the frame 11, and the frame 11 includes an upper frame 11-1 and a lower frame 11-2.

[0204] The above structure makes the arrangement of the frame 11 more reasonable and convenient for actual production and installation.

[0205] Example 2

[0206] See also Figures 10 to 25 The liquid injection device of Example 2 is basically the same as the liquid injection device of Example 1, except that:

[0207] In this embodiment, two batteries 12 are provided.

[0208] By adopting the above structure, the liquid injection device has a longer endurance.

[0209] See also Figure 21 to Figure 25 Furthermore, in the reversing valve 2, the end surface of the valve bottom sealing gasket 2-5.17 facing the valve core 2-5.14 is recessed toward the valve bottom 2-5.13 at the position corresponding to the third channel cross-sectional opening 2-5.901 or penetrates itself to form a first valve bottom sealing gasket channel 2-5.1701, and the end surface of the valve bottom sealing gasket 2-5.17 facing the valve core 2-5.14 is recessed toward the valve bottom 2-5.13 at the position corresponding to the fourth channel cross-sectional opening 2-5.1001 or penetrates itself to form a second valve bottom sealing gasket channel 2-5.1702.

[0210] By adopting the above structure, when the valve bottom sealing gasket 2-5.17 is provided with the first valve bottom sealing gasket channel 2-5.1701 and the second valve bottom sealing gasket channel 2-5.1702, the flow rate of the liquid through the third channel 2-5.9 and the fourth channel 2-5.10 can be increased without affecting the sealing performance between the valve core 2-5.14 and the valve bottom 2-5.13 and without increasing the volume of the reversing valve 2.

[0211] Further, the shape of the first valve bottom sealing gasket channel 2-5.1701 is consistent with the shape of the third channel cross-sectional opening 2-5.901, and the shape of the second valve bottom sealing gasket channel 2-5.1702 is consistent with the shape of the fourth channel cross-sectional opening 2-5.1001.

[0212] By adopting the above structure, the structures of the first valve bottom sealing gasket channel 2-5.1701 and the second valve bottom sealing gasket channel 2-5.1702 are more reasonable.

[0213] See also Figure 21 to Figure 25 Furthermore, an operating guide rod 2-10.4 is provided on the operating member body 2-10.1, and an operating guide hole 2-5.21 matching the operating guide rod 2-10.4 is provided on the valve body 2-5, and the operating guide rod 2-10.4 and the operating guide hole 2-5.21 are extended along the moving direction of the operating member body 2-10.1.

[0214] With the above structure, the setting of the operating guide rod 2-10.4 and the operating guide hole 2-5.21 can guide the movement of the operating member 2-10, making the movement of the operating member 2-10 more stable and reliable.

[0215] Furthermore, the operation guide hole 2-5.21 is set through the valve body 2-5, and the end of the operation guide rod 2-10.4 away from the operating member 2-10 passes through the operation guide hole 2-5.21 and is provided with a guide rod baffle 2-10.5, and the guide rod baffle 2-10.5 cannot pass through the operation guide hole 2-5.21.

[0216] The above structure facilitates the movable arrangement of the operating member 2-10 on the valve body 2-5 to avoid separation of the two. Specifically, the operating guide rod 2-10.4 is provided with a guide rod baffle card slot 2-10.401 at the location where the guide rod baffle 2-10.5 is provided, and the guide rod baffle 2-10.5 is arranged and installed at the guide rod baffle card slot 2-10.401. The operating guide hole 2-5.21 includes a first operating guide hole section 2-5.2101 formed on the valve bottom 2-5.13, and a sealing gasket 2-5.2101 formed on the valve bottom. -5.17, a second operation guide hole section 2-5.2102 formed on the valve core body 2-5.1401, a third operation guide hole section 2-5.2103 formed on the valve core body 2-5.1401, a fourth operation guide hole section 2-5.2104 formed on the valve sealing gasket 2-5.1402, a fifth operation guide hole section 2-5.2105 formed on the reversing layer 2-5.15, a sixth operation guide hole section 2-5.2106 formed on the valve cover sealing gasket 2-5.18, and a seventh operation guide hole section 2-5.2107 formed on the valve cover 2-5.16;

[0217] The first reversing chamber 2-5.1 and the second reversing chamber 2-5.2 are located on both sides of the center of the valve body 2-5, and the operation guide hole 2-5.21 is arranged at the center position of the valve body 2-5.

[0218] Furthermore, the reversing valve 2 comprises a third elastic member 2-11, and two ends of the third elastic member 2-11 respectively abut against the operating member body 2-10.1 and the valve body 2-5.

[0219] With the above structure, the third elastic member 2-11 is used for the reset operation of the operating member 2-10, and the structure is more reasonable.

[0220] See also Figures 16 to 18 Furthermore, the injection device includes a power switch 9 for controlling the opening and closing of the injection device, and a control device 8 for controlling the opening and closing of the power pump 3; the power switch 9 includes a power button 9-1 connected to the control device 8, and a power button 9-2 mounted on the power button 9-1; the housing 1 is provided with a power button through hole 1-2 for the power button 9-2 to pass through and be exposed.

[0221] With the above structure, the power switch 9 is provided to start and close the liquid injection device, which can prevent the operation button 6 from being accidentally pressed and causing the liquid injection device to be mistakenly started.

[0222] See also Figures 16 to 18 Furthermore, the injection device includes a power indicator light 10, and the light-emitting side of the power indicator light 10 is arranged toward the power button 9-2, and the power button 9-2 is at least partially made of a light-transmitting or semi-light-transmitting material.

[0223] With the above structure, the power indicator light 10 can be used to remind the user whether the injection device is turned on;

[0224] See also Fig.18 Further, when the power button 9 - 1 is directly arranged on the control device 8 and connected thereto, the power indicator light 10 is arranged in the control device 8 .

[0225] See also Fig.16 , Fig.18 Furthermore, the liquid injection device also includes a lighting lamp structure 13, and the lighting lamp structure 13 and the liquid injection piece 5 are arranged on the same side of the shell 1.

[0226] With the above structure, the lighting structure 13 is set so that the user can illuminate the surrounding environment when in use, so that the user can align the injection piece 5 with the injection port of the container; it can also illuminate the interior of the container when injecting liquid into the container, so that the user can observe; specifically, when the power switch 9 is operated to start the injection device, the lighting structure 13 starts to work without starting the power pump 3.

[0227] See also Fig.18 Furthermore, the injection device includes a power indicator light 15 for indicating the remaining power of the battery 12.

[0228] The above structure can remind the user of the remaining power of the battery 12 and can remind the user to charge in time to avoid affecting subsequent use. Specifically, the power indicator light 15 can indicate the remaining power through different colors; specifically, the power indicator light 10 is formed as the power indicator light 15.

[0229] Example 3

[0230] See also Figure 26 to Figure 27 The liquid injection device of Example 3 is basically the same as the liquid injection device of Example 2, except that:

[0231] In this embodiment, one battery 12 is provided.

[0232] The power button 9 - 1 and the control device 8 are two independent components, which are connected by a wire. The power button 9 - 2 is arranged on a power button circuit board 16 , and the power indicator light 10 is arranged on the power button circuit board 16 .

[0233] The same and similar parts between the various embodiments in this specification can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0234] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A liquid injection device, characterized in that: The invention comprises a housing (1), a reversing valve (2), a power pump (3), a liquid inlet component (4) having a liquid inlet passage (4-1), and a liquid injection component (5) having a liquid injection passage (5-1); the reversing valve (2) and the power pump (3) are arranged in the housing (1); the reversing valve (2) is provided with a first connection port (2-1), a second connection port (2-2), a third connection port (2-3), and a fourth connection port (2-4); the reversing valve (2) has a first working state and a second working state; and when the reversing valve (2) is in the first working state, the first connection port (2-1) is communicated with the third connection port (2-3), the second connection port (2-2) is communicated with the fourth connection port (2-4), and the reversing valve (2) is connected to the third connection port (2-3). -4), when the reversing valve (2) is in the second working state, the first connection port (2-1) is connected to the fourth connection port (2-4), and the second connection port (2-2) is connected to the third connection port (2-3); the power pump (3) has a power pump liquid inlet end (3-1) and a power pump liquid outlet end (3-2), the power pump liquid inlet end (3-1) is connected to the fourth connection port (2-4), the power pump liquid outlet end (3-2) is connected to the third connection port (2-3), the liquid inlet channel (4-1) of the liquid inlet component (4) is connected to the second connection port (2-2), and the liquid injection channel (5-1) of the liquid injection component (5) is connected to the first connection port (2-1).

2. The liquid injection device according to claim 1, characterized in that: The reversing valve (2) comprises a valve body (2-5), a first valve stem (2-6) and a second valve stem (2-7); the valve body (2-5) is provided with a first connecting port (2-1) and a second connecting port (2-2), and a third connecting port (2-3) and a fourth connecting port (2-4); the valve body (2-5) is provided with a first reversing cavity (2-5.1) and a second reversing cavity (2-5.2); the first connecting port (2-1) is communicated with the first reversing cavity (2-5.1), and the second connecting port (2-2) is communicated with the second reversing cavity (2-5.2); The first valve stem (2-6) is movably arranged on the valve body (2-5); the first reversing cavity (2-5.1) is provided with a first reversing port (2-5.101) and a second reversing port (2-5.102) in the moving direction of the first valve stem (2-6); the first reversing port (2-5.101) is connected to the third connecting port (2-3) through a first internal flow channel (2-5.3); the second reversing port (2-5.102) is connected to the fourth connecting port (2-4) through a second internal flow channel (2-5.4); One end of the valve stem (2-6) is located in the first reversing cavity (2-5.1) and is provided with a first opening and closing structure (2-6.1), and the first opening and closing structure (2-6.1) closes the first reversing port (2-5.101) and opens the second reversing port (2-5.102) when approaching the first reversing port (2-5.101), and the first opening and closing structure (2-6.1) closes the second reversing port (2-5.102) and opens the first reversing port (2-5.101) when approaching the second reversing port (2-5.102); The second valve stem (2-7) is movably arranged on the valve body (2-5); the second reversing chamber (2-5.2) is provided with a third reversing port (2-5.201) and a fourth reversing port (2-5.202) in the moving direction of the second valve stem (2-7); the third reversing port (2-5.201) is connected to the fourth connecting port (2-4) through a third internal flow channel (2-5.5); the fourth reversing port (2-5.202) is connected to the third connecting port (2-3) through a fourth internal flow channel (2-5.6); One end of the valve stem (2-7) is located in the second reversing cavity (2-5.2) and is provided with a second opening and closing structure (2-7.1), and the second opening and closing structure (2-7.1) closes the third reversing port (2-5.201) and opens the fourth reversing port (2-5.202) when approaching the third reversing port (2-5.201), and the second opening and closing structure (2-7.1) closes the fourth reversing port (2-5.202) and opens the third reversing port (2-5.201) when approaching the fourth reversing port (2-5.202).

3. The liquid injection device according to claim 2, characterized in that: The axis of the first valve stem (2-6) is parallel to the axis of the second valve stem (2-7); and the direction from the first reversing port (2-5.101) to the second reversing port (2-5.102) is consistent with the direction from the third reversing port (2-5.201) to the fourth reversing port (2-5.202).

4. The liquid injection device according to claim 2 or 3, characterized in that: The valve body (2-5) comprises a first channel (2-5.7), a second channel (2-5.8), a third channel (2-5.9), a fourth channel (2-5.10), a fifth channel (2-5.11) and a sixth channel (2-5.12), the first channel (2-5.7) having an extension distance in a direction parallel to the axis of the first valve stem (2-6), two ends of the first channel (2-5.7) forming a first channel opening (2-5.701) and a second channel opening (2-5.702), and the first channel opening (2-5.701) to the second channel opening (2-5.702) The direction of the second reversing port (2-5.101) is consistent with the direction from the first reversing port (2-5.102) to the second reversing port (2-5.102); the second channel (2-5.8) has an extension distance in a direction parallel to the axis of the second valve stem (2-7), and the two ends of the second channel (2-5.8) are formed as a third channel port (2-5.801) and a fourth channel port (2-5.802), and the direction from the third channel port (2-5.801) to the fourth channel port (2-5.802) is consistent with the direction from the third reversing port (2-5.201) to the fourth reversing port (2-5.202); The third channel (2-5.9) is arranged between the second channel port (2-5.702) and the second reversing port (2-5.102) and connects the second channel port (2-5.702) with the second reversing port (2-5.102); the fourth channel (2-5.10) is arranged between the fourth channel port (2-5.802) and the fourth reversing port (2-5.202) and connects the fourth channel port (2-5.802) with the fourth reversing port (2-5.202); The fifth channel (2-5.11) is used to connect the first reversing port (2-5.101), the third channel port (2-5.801) and the third connecting port (2-3), and the sixth channel (2-5.12) is used to connect the third reversing port (2-5.201), the first channel port (2-5.701) and the fourth connecting port (2-4).

5. The liquid injection device according to claim 4, characterized in that: The valve body (2-5) comprises a valve bottom (2-5.13), a valve core (2-5.14), a reversing layer (2-5.15), and a valve cover (2-5.16); the valve core (2-5.14) is located on one side of the valve bottom (2-5.13), the reversing layer (2-5.15) is arranged on a side of the valve core (2-5.14) away from the valve bottom (2-5.13), the valve cover (2-5.16) is arranged on a side of the reversing layer (2-5.15) away from the valve core (2-5.14), the valve core (2-5.14) is provided with the first reversing cavity (2-5.1), the second reversing cavity (2-5.2), the first channel (2-5.7), the second channel (2-5.8), the first The first connecting port (2-1) and the second connecting port (2-2) are arranged on the valve core (2-5.14), the third connecting port (2-3) and the fourth connecting port (2-4) are arranged on the valve cover (2-5.16), the first reversing port (2-5.101) and the third reversing port (2-5.201) are arranged close to the reversing layer (2-5.15), and the second reversing port (2-5.102) and the fourth reversing port (2-5.202) are arranged close to the valve bottom (2-5.13).

6. The liquid injection device according to claim 5, characterized in that: The valve core (2-5.14) comprises a valve core body (2-5.1401) and a valve sealing gasket (2-5.1402), wherein the valve core body (2-5.1401) is arranged on the valve bottom (2-5.13), and the valve sealing gasket (2-5.1402) is arranged on a side of the valve core body (2-5.1401) away from the valve bottom (2-5.13), and a first valve core cavity (2-5.1401a) and a second valve core cavity (2-5.1401b) are arranged on the valve core body (2-5.1401); The first valve core chamber (2-5.1401a) includes a first valve core upper chamber (2-5.1401a1) arranged away from the valve bottom (2-5.13), and a first valve core lower chamber (2-5.1401a2) arranged close to the valve bottom (2-5.13), one end of the first valve core upper chamber (2-5.1401a1) away from the first valve core lower chamber (2-5.1401a2) is formed as a first valve core upper opening (2-5.1401a11), the valve sealing gasket (2-5.1402) is provided with the first reversing port (2-5.101) at the first valve core upper opening (2-5.1401a11), and the first reversing port (2-5.10 1) is connected with the first valve core upper opening (2-5.1401a11), the first valve core upper chamber (2-5.1401a1) is connected with the first valve core lower chamber (2-5.1401a2) and forms the second reversing port (2-5.102) at the connecting point, the first valve core upper chamber (2-5.1401a1) and the valve sealing gasket (2-5.1402) covering the first valve core upper opening (2-5.1401a11) enclose the first reversing chamber (2-5.1), the first valve core lower chamber (2-5.1401a2) extends to the first channel (2-5.7) side and is connected thereto to form the third channel (2-5.9); The second valve core chamber (2-5.1401b) includes a second valve core upper chamber (2-5.1401b1) arranged away from the valve bottom (2-5.13), and a second valve core lower chamber (2-5.1401b2) arranged close to the valve bottom (2-5.13), the second valve core upper chamber (2-5.1401b1) away from the second valve core lower chamber (2-5.1401b2) is formed as a second valve core upper opening (2-5.1401b11), the valve sealing gasket (2-5.1402) is provided with the third reversing port (2-5.201) at the second valve core upper opening (2-5.1401b11), and the third reversing port (2-5.201 ) is communicated with the second valve core upper opening (2-5.1401b11), the second valve core upper chamber (2-5.1401b1) is communicated with the second valve core lower chamber (2-5.1401b2) and the fourth reversing port (2-5.202) is formed at the communicating portion, the second valve core upper chamber (2-5.1401b1) and the valve sealing gasket (2-5.1402) covering the second valve core upper opening (2-5.1401b11) are enclosed to form the second reversing chamber (2-5.2), the second valve core lower chamber (2-5.1401b2) extends toward the second channel (2-5.8) and is communicated with it to form the fourth channel (2-5.10); The first channel (2-5.7) includes a first channel valve core body section (2-5.703) formed on the valve core body (2-5.1401), and a first channel sealing gasket section (2-5.704) formed on the valve sealing gasket (2-5.1402); the second channel (2-5.8) includes a second channel valve core body section (2-5.803) formed on the valve core body (2-5.1401), and a second channel sealing gasket section (2-5.804) formed on the valve sealing gasket (2-5.1402).

7. The liquid injection device according to claim 5, characterized in that: The reversing valve (2) comprises a valve bottom sealing gasket (2-5.17) arranged between the valve bottom (2-5.13) and the valve core (2-5.14); a third channel cross-sectional opening (2-5.901) is formed on the end surface of the valve core (2-5.14) facing the valve bottom (2-5.13) on the side of the third channel (2-5.9) facing the valve bottom (2-5.13); a fourth channel cross-sectional opening (2-5.1001) is formed on the end surface of the valve core (2-5.14) facing the valve bottom (2-5.13) on the side of the fourth channel (2-5.10) facing the valve bottom (2-5.13); The end surface of the valve bottom sealing gasket (2-5.17) facing the valve core (2-5.14) is arranged in a complete plane; Alternatively, the end surface of the valve bottom sealing gasket (2-5.17) facing the valve core (2-5.14) is recessed toward the valve bottom (2-5.13) at a position corresponding to the third channel cross-sectional opening (2-5.901) or penetrates through itself to form a first valve bottom sealing gasket channel (2-5.1701), and the end surface of the valve bottom sealing gasket (2-5.17) facing the valve core (2-5.14) is recessed toward the valve bottom (2-5.13) at a position corresponding to the fourth channel cross-sectional opening (2-5.1001) or penetrates through itself to form a second valve bottom sealing gasket channel (2-5.1702); The shape of the first valve bottom sealing gasket channel (2-5.1701) is consistent with the shape of the third channel cross-sectional opening (2-5.901), and the shape of the second valve bottom sealing gasket channel (2-5.1702) is consistent with the shape of the fourth channel cross-sectional opening (2-5.1001).

8. The liquid injection device according to claim 5, characterized in that: The reversing valve (2) comprises a valve cover sealing gasket (2-5.18) arranged between the reversing layer (2-5.15) and the valve cover (2-5.16); the valve cover sealing gasket (2-5.18) is provided with a first sealing avoidance opening (2-5.1801) at the connection point between the fifth channel (2-5.11) and the third connecting port (2-3); and the valve cover sealing gasket (2-5.18) is provided with a second sealing avoidance opening (2-5.1802) at the connection point between the sixth channel (2-5.12) and the fourth connecting port (2-4); The valve cover sealing gasket (2-5.18) is protruded at the first valve stem (2-6) and the second valve stem (2-7) respectively away from the reversing layer (2-5.15) to form a first membrane cavity (2-5.1803) and a second membrane cavity (2-5.1804), and the reversing layer (2-5.15) is provided with a first valve stem guide hole (2-5.1501) and a second valve stem guide hole (2-5.1502) at the first valve stem (2-6) and the second valve stem (2-7). A valve stem guide hole (2-5.1502), one end of the first valve stem (2-6) not provided with the first opening and closing structure (2-6.1) passes through the first valve stem guide hole (2-5.1501) and is located in the first diaphragm cavity (2-5.1803), and one end of the second valve stem (2-7) not provided with the second opening and closing structure (2-7.1) passes through the second valve stem guide hole (2-5.1502) and is located in the second diaphragm cavity (2-5.1804).

9. The liquid injection device according to claim 8, characterized in that: The reversing valve (2) comprises a first elastic member (2-8) and a second elastic member (2-9); the first elastic member (2-8) acts on the first valve stem (2-6) so that the first valve stem (2-6) has a tendency to move toward the first reversing port (2-5.101) when the first opening and closing structure (2-6.1) is away from the first reversing port (2-5.101); the second elastic member (2-9) acts on the second valve stem (2-7) so that the second valve stem (2-7) has a tendency to move toward the third reversing port (2-5.201) when the second opening and closing structure (2-7.1) is away from the third reversing port (2-5.201); The first elastic member (2-8) is a spring, and a first stop block (2-6.2) is provided at one end of the first valve stem (2-6) where the first opening and closing structure (2-6.1) is not provided. The first elastic member (2-8) is sleeved on the first valve stem (2-6), and the first elastic member (2-8) is located between the reversing layer (2-5.15) and the first stop block (2-6.2); The second elastic member (2-9) is a spring, and a second stop block (2-7.2) is provided at one end of the second valve stem (2-7) where the second opening and closing structure (2-7.1) is not provided. The second elastic member (2-9) is sleeved on the second valve stem (2-7), and the second elastic member (2-9) is located between the reversing layer (2-5.15) and the second stop block (2-7.2).

10. The liquid injection device according to claim 3, characterized in that: The reversing valve (2) comprises an operating member (2-10) for controlling the movement state of the first valve stem (2-6) and the second valve stem (2-7), and the operating member (2-10) controls the first valve stem (2-6) and the second valve stem (2-7) to synchronously close the first reversing port (2-5.101) and the third reversing port (2-5.201), or to synchronously close the second reversing port (2-5.102) and the fourth reversing port (2-5.202); The liquid injection device comprises an operating button (6), wherein the operating button (6) abuts against the operating member (2-10); the housing (1) is provided with an operating button through hole (1-1) for the operating button (6) to pass through and be exposed; The first valve stem (2-6) has a tendency to move toward the first reversing port (2-5.101) under the action of the first elastic member (2-8) when the first opening and closing structure (2-6.1) is away from the first reversing port (2-5.101); the second valve stem (2-7) has a tendency to move toward the third reversing port (2-5.201) under the action of the second elastic member (2-9) when the second opening and closing structure (2-7.1) is away from the third reversing port (2-5.201); The operating member (2-10) comprises an operating member body (2-10.1), the operating member body (2-10.1) is arranged on the side of the first valve stem (2-6) and the second valve stem (2-7) where the first opening and closing structure (2-6.1) and the second opening and closing structure (2-7.1) are not arranged, and the movable direction of the operating member body (2-10.1) is parallel to the axis of the first valve stem (2-6) and the second valve stem (2-7); the operating member body (2-10.1) is provided with a first pressure rod (2-10.2) and a second pressure rod (2-10.3), and the first pressure rod (2-10.2) is arranged opposite to the first valve stem (2-6), and the second pressure rod (2-10.3) is arranged opposite to the second valve stem (2-7); One end of the first valve stem (2-6) and the second valve stem (2-7) not provided with the first opening and closing structure (2-6.1) and the second opening and closing structure (2-7.1) is located inside the valve body (2-5); the valve body (2-5) is provided with a first pressure rod operating hole (2-5.19) matching the first pressure rod (2-10.2) at a position corresponding to the first valve stem (2-6), and a second pressure rod operating hole (2-5.20) matching the second pressure rod (2-10.3) at a position corresponding to the second valve stem (2-7); the first pressure rod (2-10.2) passes through the first pressure rod operating hole (2-5.19) to control the first valve stem (2-6), and the second pressure rod (2-10.3) passes through the second pressure rod operating hole (2-5.20) to control the second valve stem (2-7); The operating member body (2-10.1) is provided with an operating guide rod (2-10.4), the valve body (2-5) is provided with an operating guide hole (2-5.21) matching the operating guide rod (2-10.4), and the operating guide rod (2-10.4) and the operating guide hole (2-5.21) are extended along the movable direction of the operating member body (2-10.1); The operation guide hole (2-5.21) is arranged through the valve body (2-5); one end of the operation guide rod (2-10.4) away from the operating member (2-10) passes through the operation guide hole (2-5.21) and is provided with a guide rod baffle (2-10.5); and the guide rod baffle (2-10.5) cannot pass through the operation guide hole (2-5.21); The reversing valve (2) comprises a third elastic member (2-11), and two ends of the third elastic member (2-11) respectively abut against the operating member body (2-10.1) and the valve body (2-5).

11. The liquid injection device according to claim 2, characterized in that: The first opening and closing structure (2-6.1) comprises a first sealing portion (2-6.101) for opening and closing the first reversing port (2-5.101), and a second sealing portion (2-6.102) for opening and closing the second reversing port (2-5.102), the first sealing portion (2-6.101) being arranged toward the first reversing port (2-5.101) and having a diameter larger than a hole of the first reversing port (2-5.101). The second sealing portion (2-6.102) is arranged toward the second reversing port (2-5.102) and the diameter of the second sealing portion (2-6.102) is larger than the aperture of the second reversing port (2-5.102); the first sealing portion (2-6.101) and / or the first reversing port (2-5.101) are surrounded by a sealing material; the second sealing portion (2-6.102) and / or the second reversing port (2-5.102) are surrounded by a sealing material; The second opening and closing structure (2-7.1) comprises a third sealing portion (2-7.101) for opening and closing the third reversing port (2-5.201), and a fourth sealing portion (2-7.102) for opening and closing the fourth reversing port (2-5.202), the third sealing portion (2-7.101) being arranged toward the third reversing port (2-5.201) and the diameter of the third sealing portion (2-7.101) being larger than the hole of the third reversing port (2-5.201). The fourth sealing portion (2-7.102) is arranged toward the fourth reversing port (2-5.202) and the diameter of the fourth sealing portion (2-7.102) is larger than the aperture of the fourth reversing port (2-5.202), the third sealing portion (2-7.101) and / or the third reversing port (2-5.201) are surrounded by a sealing material, and the fourth sealing portion (2-7.102) and / or the fourth reversing port (2-5.202) are surrounded by a sealing material; A first protrusion (2-12) is provided on the periphery of the first reversing port (2-5.101) toward one side of the first sealing portion (2-6.101) or the first sealing portion (2-6.101) toward the first reversing port (2-5.101), and the first protrusion (2-12) is provided around the axis of the first reversing port (2-5.101); a second protrusion (2-13) is provided on the periphery of the second reversing port (2-5.102) toward one side of the second sealing portion (2-6.102) or the second sealing portion (2-6.102) toward the second reversing port (2-5.102), and the second protrusion (2-13) is provided around the axis of the second reversing port (2-5.102); A third protrusion (2-14) is arranged on the periphery of the third reversing port (2-5.201) toward one side of the third sealing portion (2-7.101) or the third sealing portion (2-7.101) is arranged toward the side of the third reversing port (2-5.201), and the third protrusion (2-14) is arranged around the axis of the third reversing port (2-5.201); a fourth protrusion (2-15) is arranged on the periphery of the fourth reversing port (2-5.202) toward one side of the fourth sealing portion (2-7.102) or the fourth sealing portion (2-7.102) is arranged toward the side of the fourth reversing port (2-5.202), and the fourth protrusion (2-15) is arranged around the axis of the fourth reversing port (2-5.202).

12. The liquid injection device according to claim 1, characterized in that: The invention comprises an operation button (6), a button detection device (7), and a control device (8), wherein the control device (8) is connected to the power pump (3) and is used to control the working state of the power pump (3); the operation button (6) is arranged on the housing (1) in a pressable manner, and is used to control the working state of the reversing valve (2); when the operation button (6) is not pressed, the reversing valve (2) is in a second working state, and when the operation button (6) is pressed, the reversing valve (2) is in a first working state; the button detection device (7) is used to detect the pressing condition of the operation button (6) and send a signal to the control device (8); when the button detection device (7) detects that the operation button (6) is pressed, the control device (8) controls the power pump (3) to work according to the signal; when the button detection device (7) detects that the operation button (6) switches from being pressed to not being pressed, the control device (8) controls the power pump (3) to stop working after a set delay time according to the signal.

13. The liquid injection device according to claim 1, characterized in that: The invention comprises a power switch (9) for controlling the opening and closing of the liquid injection device, and a control device (8) for controlling the opening and closing of the power pump (3); the power switch (9) comprises a power button (9-1) connected to the control device (8), and a power button (9-2) sleeved on the power button (9-1); the housing (1) is provided with a power button through hole (1-2) for the power button (9-2) to pass through and be exposed; The liquid injection device comprises a power indicator light (10), and the light-emitting side of the power indicator light (10) is arranged toward the power button (9-2), and the power button (9-2) is at least partially made of a light-transmitting or semi-light-transmitting material.

14. The liquid injection device according to claim 1, characterized in that: The liquid injection part (5) and the liquid inlet part (4) are respectively located at two ends of the housing (1); The liquid injection device comprises a frame (11), the reversing valve (2) and the power pump (3) are fixedly arranged on the frame (11), and the housing (1) is sleeved on the outside of the frame (11); The liquid injection device further comprises a battery (12) for supplying power to the liquid injection device, wherein the battery (12) is fixedly arranged inside the housing (1), and one or more batteries (12) are provided; The liquid injection device further comprises an illumination lamp structure (13), wherein the illumination lamp structure (13) and the liquid injection piece (5) are arranged on the same side of the housing (1).

15. The liquid injection device according to claim 14, characterized in that: The battery (12) is a rechargeable battery, and the liquid injection device comprises a charging interface (14) for charging the battery (12); The charging interface (14) and the liquid inlet component (4) are arranged on the same side of the housing (1); The reversing valve (2), the power pump (3), and the battery (12) are fixedly arranged in the frame (11); the frame (11) comprises an upper frame (11-1) and a lower frame (11-2); The liquid injection device comprises a power indicator light (15) for indicating the remaining power of the battery (12).

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