A spill-resistant squeeze pump

Abstract

The application discloses an anti-overflow liquid pressing pump, which comprises a pump body, a lock cover and a pump column assembly. The pump body is provided with a piston mounting cavity; the lock cover is arranged at the upper end of the pump body, the lock cover is provided with a gas supplement hole communicating between the inside and the outside of the lock cover, and the gas supplement hole is isolated from the piston mounting cavity; the pump column assembly is arranged in the pump body in a vertical movable mode and is inserted into the piston mounting cavity of the pump body, the pump column assembly has a storage position and a use position relative to the pump body, in the storage position, the pump column assembly blocks the gas supplement hole; the pump column assembly can be lifted relative to the pump body to switch from the storage position to the use position; in the use position, the inside of the lock cover is communicated to the outside of the lock cover through the gas supplement hole; as the piston mounting cavity is isolated from the gas supplement hole, the liquid in the liquid storage bottle cannot enter the piston mounting cavity through the gas supplement hole, so when the pump column assembly is lifted, the outer periphery of the pump column assembly cannot be attached with the liquid, thereby reducing the risk of liquid overflow of the pressing pump.

Description

Technical Field

[0001] This invention relates to the field of push pumps, and particularly to an anti-overflow push pump. Background Technology

[0002] Some existing push-button pumps include a pump body, a locking cap, and a pump column assembly. The locking cap is located at the upper end of the pump body and is used to fix the pump body to the liquid storage bottle. The pump column assembly passes through the locking cap and is inserted into the piston mounting cavity of the pump body, and can move up and down. The pump column assembly moves up and down to squeeze the liquid in the liquid storage bottle through the liquid outlet channel of the pump column assembly. An air inlet is provided at the upper part of the pump body, communicating with the piston mounting cavity. An air gap channel is provided between the pump column assembly and the locking cap, allowing the air inlet to communicate with the outside through the piston mounting cavity and the air gap channel. During normal use of the push-button pump, the air pressure inside the liquid storage bottle can be kept balanced with the external air pressure.

[0003] Normally, when transporting a pump mounted on a reservoir, the pump column assembly is pressed down and fixed in its lowest storage position. When the pump is ready for normal use, the pump column assembly first unlocks and rises to the operating position, and can then be freely pressed up and down. If the reservoir has been tipped over during transport, liquid from the reservoir may enter the piston mounting chamber through the vent. When the pump column rises from the storage position to the operating position, liquid from the piston mounting chamber may adhere to the outer circumference of the pump column assembly and be pulled out of the locking cap, causing liquid spillage. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes an anti-overflow pump that can reduce the risk of liquid overflowing from the pump pump during the pump column assembly's ascent.

[0005] An anti-overflow push-button pump according to an embodiment of the present invention includes a pump body, a locking cover, and a pump column assembly. The pump body has a piston mounting cavity; the locking cover is disposed at the upper end of the pump body, and the locking cover has an air inlet hole communicating with the inner and outer sides of the locking cover, the air inlet hole being isolated from the piston mounting cavity; the pump column assembly is vertically movably disposed on the pump body and inserted into the piston mounting cavity of the pump body, the pump column assembly having a storage position and a use position relative to the pump body; in the storage position, the pump column assembly blocks the air inlet hole; the pump column assembly can rise relative to the pump body to switch from the storage position to the use position; in the use position, the inner side of the locking cover communicates with the outer side of the locking cover through the air inlet hole.

[0006] The push-button pump according to embodiments of the present invention has at least the following beneficial effects: When the push-button pump is installed on the liquid storage bottle for storage and transportation, the pump column assembly is in the storage position and the air inlet of the lock cap is blocked, so that the liquid in the liquid storage bottle cannot flow out through the air inlet. Since the piston mounting cavity is isolated from the air inlet, the liquid in the liquid storage bottle cannot enter the piston mounting cavity through the air inlet. Therefore, when the pump column assembly rises, the outer periphery of the pump column assembly will not be attached to the pump column assembly, thereby reducing the risk of liquid overflowing from the push-button pump; after the pump column assembly rises to the use position, the air inlet is opened to facilitate the liquid storage bottle to maintain the balance with the external air pressure during use.

[0007] According to some embodiments of the present invention, the air inlet extends vertically and connects the upper and lower sides of the lock cover.

[0008] According to some embodiments of the present invention, the upper end face of the lock cover is provided with a protrusion, the upper end opening of the air inlet is provided on the protrusion, and the upper end opening of the air inlet is higher than the upper end face of the lock cover.

[0009] According to some embodiments of the present invention, the upper opening of the air inlet is oriented horizontally.

[0010] According to some embodiments of the present invention, the upper end opening of the air inlet is located on the side of the protrusion near the central axis of the pump column assembly.

[0011] According to some embodiments of the present invention, the pump column assembly is provided with an annular plate portion, one side of the protrusion is arc-shaped and adapted to the periphery of the annular plate portion, and the annular plate portion is movable vertically to abut or disengage from the protrusion portion.

[0012] According to some embodiments of the present invention, the lower edge of the annular plate is provided with a first chamfer, and the upper end of the protrusion near the side wall of the pump column assembly is provided with a second chamfer.

[0013] According to some embodiments of the present invention, the pump column assembly is provided with a connecting plate portion in a horizontal direction, the outer periphery of the connecting plate portion is connected to the annular plate portion, and in the storage position, the lower side of the connecting plate portion abuts against the upper end face of the lock cover.

[0014] According to some embodiments of the present invention, the upper end of the piston mounting cavity is provided with an opening, the locking cover covers the upper end opening of the piston mounting cavity, the locking cover is provided with an insertion hole, and the pump column assembly passes through the insertion hole; the pump column assembly is provided with a locking part, the locking cover is provided with a locking engagement part, the pump column assembly is in the storage position, and the locking part cooperates with the locking engagement part to restrict the pump column assembly from rising.

[0015] According to some embodiments of the present invention, the pump column assembly includes a pusher, a connecting column, and a main column, wherein the pusher, the connecting column, and the main column are connected vertically in sequence, the main column is provided with a piston portion located within a piston mounting cavity, the main column is provided with a liquid outlet channel communicating with the piston mounting cavity, the connecting column is provided with a connecting channel, and the liquid outlet channel is connected to the liquid outlet of the pusher through the connecting channel.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a perspective view of the anti-overflow pump in the storage position according to an embodiment of the present invention;

[0019] Figure 2 The anti-overflow pump in this embodiment of the invention is in Figure 1 A magnified view of a portion of point A;

[0020] Figure 3 This is a three-dimensional schematic diagram of the anti-overflow pump in the usage position according to an embodiment of the present invention;

[0021] Figure 4 The anti-overflow pump in this embodiment of the invention is in Figure 3 A magnified view of a portion of point B.

[0022] Figure label:

[0023] Pump body 100, piston mounting chamber 110, first check valve 120;

[0024] Lock cover 200, air vent 210, protrusion 220, second chamfer 221, locking fit 222;

[0025] Pump column assembly 300, push head 310, connecting column 320, annular plate portion 321, first chamfer portion 322, connecting plate portion 323, locking portion 324, connecting channel 325, main column 330, piston portion 331, liquid outlet channel 332, second check valve 340;

[0026] Spring 400. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0029] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0030] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0031] Reference Figures 1 to 4 This invention provides an anti-overflow pump, comprising a pump body 100, a locking cover 200, and a pump column assembly 300. The pump body 100 has a piston mounting cavity 110. The locking cover 200 is located at the upper end of the pump body 100 and has an air inlet 210 connecting its inner and outer sides. The air inlet 210 is isolated from the piston mounting cavity 110. The pump column assembly 300 is vertically movably mounted on the pump body 100 and inserted into the piston mounting cavity 110. The pump column assembly 300 has a storage position and a use position relative to the pump body 100. In the storage position, the pump column assembly 300 blocks the air inlet 210. The pump column assembly 300 can rise relative to the pump body 100 to switch from the storage position to the use position. In the use position, the inner side of the locking cover 200 is connected to the outer side of the locking cover 200 through the air inlet 210.

[0032] When the pump is installed on the storage bottle for storage and transportation, the pump column assembly 300 is in the storage position and the air inlet 210 of the locking cap 200 is blocked, so that the liquid in the storage bottle cannot flow out through the air inlet 210. Since the piston mounting cavity 110 is isolated from the air inlet 210, the liquid in the storage bottle cannot enter the piston mounting cavity 110 through the air inlet 210. Therefore, when the pump column assembly 300 rises, the outer periphery of the pump column assembly 300 will not be attached to it, thereby reducing the risk of liquid overflowing the pump. After the pump column assembly 300 rises to the use position, the air inlet 210 is opened to facilitate the balance between the storage bottle and the external air pressure during use.

[0033] Specifically, the inner side of the locking cap 200 refers to the area that communicates with the internal space of the liquid storage bottle when the locking cap 200 is installed in the liquid storage bottle.

[0034] In this embodiment, the air inlet 210 extends vertically and connects the upper and lower sides of the locking cap 200. Since the periphery of the locking cap 200 is connected and fixed to the bottle mouth when the locking cap 200 is installed on the bottle mouth of the liquid storage bottle, the lower end of the air inlet 210 will directly connect with the internal space of the liquid storage bottle, allowing the air inlet 210 to smoothly communicate with the internal space of the liquid storage bottle for air replenishment. Furthermore, it is convenient to machine the air inlet 210 into the locking cap 200, and the shape of the air inlet 210 is relatively simple and easy to implement.

[0035] It is conceivable that the air inlet 210 can also be extended in the left and right direction to connect the left and right sides of the lock cover 200; the air inlet 210 can also be extended in other shapes, and those skilled in the art can configure it according to actual needs.

[0036] Specifically, the air inlet 210 has a rectangular cross-section, which is relatively easy to process. It is conceivable that the cross-sectional shape of the air inlet 210 can also be other shapes, such as circular, polygonal, or other shapes, which can be configured according to actual needs by those skilled in the art.

[0037] In this embodiment, a protrusion 220 is provided on the upper surface of the locking cover 200, and the upper opening of the air inlet 210 is located on the protrusion 220, with the upper opening of the air inlet 210 being higher than the upper surface of the locking cover 200. Since tap water can easily splash onto the locking cover 200 during use, if the upper opening of the air inlet 210 is higher than the upper surface of the locking cover 200, residual water on the upper surface of the locking cover 200 will not easily flow into the storage bottle through the air inlet 210.

[0038] In this embodiment, the upper opening of the air inlet 210 faces horizontally, so that splashed tap water and dust will not fall directly into the storage bottle through the air inlet 210, reducing the risk of contamination of the liquid in the storage bottle using this press pump.

[0039] In this embodiment, the upper opening of the air inlet 210 is located on the side of the protrusion 220 near the central axis of the pump column assembly 300. This orientation of the upper opening of the air inlet 210 makes it less likely for tap water splashing from the pump to enter the storage bottle through the air inlet 210, thus improving the waterproofing effect of the air inlet 210.

[0040] In this embodiment, the pump column assembly 300 is provided with an annular plate portion 321. One side of the protrusion 220 is arc-shaped and adapted to the periphery of the annular plate portion 321. The annular plate portion 321 can move vertically to abut or disengage from the protrusion 220. When the pump column assembly 300 moves to the point where the annular plate portion 321 abuts the protrusion 220, since the outer periphery of the annular plate portion 321 is adapted to the side wall of the protrusion 220, and the upper opening of the air inlet 210 is located on the side wall of the protrusion 220, the annular plate portion 321 can block the upper opening of the air inlet 210 that is horizontally oriented toward the central axis of the pump column assembly 300. Furthermore, the upper opening of the air inlet 210 can be blocked at various points on the outer periphery of the annular plate portion 321, making the installation of the pump column assembly 300 relatively flexible and without the need for specific directional limitations.

[0041] Understandably, when the upper opening of the air inlet 210 is opened in a direction away from the pump column assembly 300, the inner circumferential side of the annular plate portion 321 can block or open the upper opening of the air inlet 210.

[0042] In this embodiment, the lower edge of the annular plate portion 321 is provided with a first chamfer portion 322, and the upper end of the protrusion portion 220 near the side wall of the pump column assembly 300 is provided with a second chamfer portion 221. The first chamfer portion 322 and the second chamfer portion 221 ensure smooth movement of the annular plate portion 321 when it descends and contacts the protrusion portion 220, preventing jamming. Specifically, both the first chamfer portion 322 and the second chamfer portion 221 are rounded, resulting in a simple structure and easy processing. It is conceivable that the first chamfer portion 322 and the second chamfer portion 221 could also be beveled; those skilled in the art can configure them according to actual needs.

[0043] In this embodiment, the pump column assembly 300 is provided with a connecting plate portion 323 in a horizontal direction. The outer periphery of the connecting plate portion 323 is connected to the annular plate portion 321. In the storage position, the lower side of the connecting plate portion 323 abuts against the upper end face of the locking cover 200. The connecting plate portion 323 can limit the position of the pump column assembly 300 relative to the locking cover 200 in the storage position and also serves to fix the annular plate portion 321.

[0044] In this embodiment, the upper end of the piston mounting cavity 110 has an opening, and the locking cap 200 covers the upper opening of the piston mounting cavity 110. The locking cap 200 has an insertion hole through which the pump column assembly 300 passes. The pump column assembly 300 has a locking part 324, and the locking cap 200 has a locking engagement part 222. When the pump column assembly 300 is in the storage position, the locking part 324 and the locking engagement part 222 cooperate to restrict the pump column assembly 300 from rising. By providing the locking part 324 and the locking engagement part 222, the pump column assembly 300 can be kept in the storage position relative to the locking cap 200 when storing and transporting the liquid storage bottle. The structure is simple and easy to implement. Specifically, the locking part 324 is a stud part, and the locking engagement part 222 is a threaded hole. When the pump column assembly 300 is in the storage position, the stud part is threadedly connected to the threaded hole, making it convenient to transport when the pump is installed on the liquid storage bottle. When the pump needs to be used, rotate the pump column assembly 300 so that the stud part disengages from the threaded hole, thereby allowing the pump column assembly 300 to rise to the use position for normal use.

[0045] It is conceivable that the locking part 324 and the locking engagement part 222 can also be other structures. For example, the locking part 324 can be a hook, and the locking engagement part 222 can be a slot. The hook and the slot can engage to restrict the rise of the pump column assembly 300.

[0046] In this embodiment, the pump column assembly 300 includes a pusher head 310, a connecting column 320, and a main column 330. The pusher head 310, connecting column 320, and main column 330 are connected vertically in sequence. The main column 330 is provided with a piston portion 331, which is located within a piston mounting cavity 110. The main column 330 is provided with a liquid outlet channel 332 communicating with the piston mounting cavity 110. The connecting column 320 is provided with a connecting channel 325, and the liquid outlet channel 332 communicates with the liquid outlet of the pusher head 310 through the connecting channel 325. The pump column assembly 300 described above is convenient for assembly after separate manufacturing. Specifically, when the user presses the pusher head 310, the pusher head 310 drives the main column 330 to descend via the connecting column 320. The main column 330 drives the piston portion 331 to compress the piston mounting cavity 110 below the piston portion 331, causing the liquid inside to be squeezed out from the liquid outlet of the pusher head 310 through the liquid outlet channel 332 and the connecting channel 325.

[0047] Specifically, the piston part 331 is integrally formed with the main column 330, simplifying the structure of the pump column assembly 300. A spring 400 is provided between the lower part of the main column 330 and the bottom of the piston mounting cavity 110. The spring 400 can apply a force to push the pump column assembly 300 upward, so that the pump column assembly 300 can automatically return to its upward position after being pressed down.

[0048] It is conceivable that the pump column assembly 300 can also be a single piece, or the connecting column 320 and the main column 330 can be a single piece, and those skilled in the art can configure it according to actual needs.

[0049] In one embodiment, a first one-way valve 120 is provided at the lower end of the piston mounting cavity 110, which allows liquid in the storage bottle to enter the piston mounting cavity 110 from the lower end of the piston mounting cavity 110.

[0050] In this embodiment, the pump column assembly 300 further includes a second one-way valve 340, which is disposed in the connection channel 325 and allows liquid to flow from the outlet channel 332 through the connection channel 325 and out of the outlet. The second one-way valve 340 is provided so that when the pump column assembly 300 rises, the air pressure inside the piston mounting chamber 110 decreases, drawing liquid from the storage bottle through the first one-way valve 120 into the piston mounting chamber 110.

[0051] Specifically, the upper end of the push-button 310 and the connecting post 320 are fixed together by plugging and snapping. The lower end of the connecting post 320 and the upper end of the main post 330 are fixed together by plugging and snapping.

[0052] Specifically, the pump body 100 is cylindrical, and its upper end is fixed to the lower side of the locking cover 200 by insertion and snap-fit. It is conceivable that the upper end of the pump body 100 can also be fixed to the locking cover 200 by a threaded connection.

[0053] Specifically, when the pump is in the storage position, the pusher head 310 of the pump column assembly 300 blocks the protrusion 220, making the protrusion 220 less likely to be contacted and damaged, and preventing the protrusion 220 from being broken during transportation.

[0054] Specifically, both the annular plate portion 321 and the connecting plate portion 323 are disposed on the connecting post 320.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An anti-overflow push-button pump, characterized in that, include: The pump body (100) is provided with a piston mounting cavity (110); A locking cover (200) is provided at the upper end of the pump body (100). The locking cover (200) is provided with an air inlet (210) that connects the inner and outer sides of the locking cover (200). The air inlet (210) is isolated from the piston mounting cavity (110). A pump column assembly (300) is vertically movably disposed on the pump body (100) and inserted into the piston mounting cavity (110) of the pump body (100). The pump column assembly (300) has a storage position and a use position relative to the pump body (100). In the storage position, the pump column assembly (300) blocks the air inlet (210). The pump column assembly (300) can rise relative to the pump body (100) to switch from the storage position to the use position. In the use position, the inner side of the locking cover (200) is connected to the outer side of the locking cover (200) through the air inlet (210). The upper end face of the lock cover (200) is provided with a protrusion (220), and the upper end opening of the air inlet (210) is provided on the protrusion (220). The upper end opening of the air inlet (210) is higher than the upper end face of the lock cover (200).

2. The anti-overflow pump according to claim 1, characterized in that: The air inlet (210) extends vertically and connects the upper and lower sides of the lock cover (200).

3. The anti-overflow pump according to claim 1, characterized in that: The upper opening of the air inlet (210) faces the horizontal direction.

4. The anti-overflow pump according to claim 1, characterized in that: The upper opening of the air inlet (210) is located on the side of the protrusion (220) near the central axis of the pump column assembly (300).

5. The anti-overflow pump according to claim 1, characterized in that: The pump column assembly (300) is provided with an annular plate portion (321), one side of the protrusion (220) is arc-shaped and adapted to the periphery of the annular plate portion (321), and the annular plate portion (321) can move vertically to abut or disengage from the protrusion (220).

6. The anti-overflow pump according to claim 5, characterized in that: The lower edge of the annular plate (321) is provided with a first chamfer (322), and the upper end of the protrusion (220) near the side wall of the pump column assembly (300) is provided with a second chamfer (221).

7. The anti-overflow pump according to claim 5, characterized in that: The pump column assembly (300) is provided with a connecting plate portion (323) in the horizontal direction. The outer periphery of the connecting plate portion (323) is connected to the annular plate portion (321). In the storage position, the lower side of the connecting plate portion (323) abuts against the upper end face of the lock cover (200).

8. The anti-overflow pump according to claim 1, characterized in that: The piston mounting cavity (110) has an opening at its upper end. The locking cover (200) covers the upper opening of the piston mounting cavity (110). The locking cover (200) has an insertion hole, through which the pump column assembly (300) passes. The pump column assembly (300) has a locking part (324), and the locking cover (200) has a locking engagement part (222). When the pump column assembly (300) is in the storage position, the locking part (324) and the locking engagement part (222) cooperate to restrict the pump column assembly (300) from rising.

9. The anti-overflow pump according to claim 1, characterized in that: The pump column assembly (300) includes a pusher (310), a connecting column (320), and a main column (330). The pusher (310), the connecting column (320), and the main column (330) are connected vertically in sequence. The main column (330) is provided with a piston part (331), which is located in the piston mounting cavity (110). The main column (330) is provided with a liquid outlet channel (332) communicating with the piston mounting cavity (110). The connecting column (320) is provided with a connecting channel (325), and the liquid outlet channel (332) is connected to the liquid outlet of the pusher (310) through the connecting channel (325).

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