Pressing pump capable of limiting external water inflow

Abstract

The utility model discloses a pressing pump for limiting external water inflow, which comprises a body, a threaded cover is rotatably arranged at the upper end of the body, a movable channel is arranged in the middle of the threaded cover in a penetrating manner, an internal threaded hole is formed in the movable channel, and the radial size of an upper port of the movable channel is consistent with the nominal diameter of the internal threaded hole; the upper end face of the thread cover is provided with a spiral extending groove connected with the upper end of the inner threaded hole. The pressing head is connected with a pump body assembly, the pump body assembly is provided with an external threaded column capable of being screwed into the internal threaded hole along the spiral extending groove, and a sealing structure is arranged between the pump body assembly and the movable channel. When the external threaded column is separated from the internal threaded hole, as the radial size of the upper end opening of the movable channel is consistent with the nominal diameter of the internal threaded hole, the gap between the upper end opening of the movable channel and the pump body assembly is small, external water is difficult to enter, the external water inflow is reduced, and the problem that the pressing hand feeling is too heavy is solved; and the sealing structure can prevent external water from permeating into the body to pollute the emulsion.

Description

Technical Field

[0001] The utility model relates to a pressing pump which limits external water inflow. Background Art

[0002] At present, a general press pump includes a body, a lock cover disposed on the upper end of the body, a threaded cover sleeved on the outside of the body and located between the lock cover and the body, and a press head threadedly connected to the lock cover. The press head has a tightened state and an unscrewed state relative to the lock cover. In the tightened state, the press head cannot move up and down, thereby preventing liquid from spilling during transportation or storage. In the unscrewed state, the press head can move up and down for normal use by the user.

[0003] Among them, in order to realize the threaded connection between the push head and the lock cover, a threaded channel is usually provided in the middle part of the lock cover, the push head has a threaded column part matching with the threaded channel, and the upper end of the threaded channel is provided with an expanded hole part whose radial dimension is larger than the outer diameter dimension of the threaded column part to facilitate the assembly of the push head, and the push head is connected with a pump body assembly which can be lifted and moved relative to the main body, and there is a large gap between the outer peripheral wall of the pump body assembly and the expanded hole part, and external water can enter the threaded channel through the gap, resulting in the problem of heavy pressing feel, and part of the water even extends into the main body and contaminates the lotion in the bottle.

[0004] In addition, a general pressing pump adopts a clockwise tightening thread structure between the screw cover and the bottle body, and between the push head and the locking cover. When the cross-section of the bottle body is rectangular, in order to prevent the push head from protruding along the width direction of the cross-section of the bottle body to occupy a larger placement space, it is generally necessary to limit the push head to point in the length direction of the cross-section of the bottle body, and then tighten the screw cover to the bottle body. When the screw cover can drive the locking cover to produce a certain angle of deflection, tightening the screw cover will cause the push head to rotate counterclockwise relative to the locking cover so that the push head can move up and down for normal use by the user. Such a structure is not conducive to the storage and sales of the product. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a pressing pump that limits external water inflow, which can reduce the amount of external water inflow to alleviate the problem of heavy pressing feel, and can also prevent external water from penetrating into the body to contaminate the lotion.

[0006] According to an embodiment of the utility model, a pressing pump for limiting external water inflow comprises: a main body, a screw cover is rotatably provided on the upper end of the main body, a movable channel is penetrated through the middle of the screw cover, an inner circumferential wall of the movable channel is provided with an internal threaded hole, a radial dimension of the upper port of the movable channel is consistent with the nominal diameter of the internal threaded hole, an upper end surface of the screw cover is provided with a spiral extension groove connected to the upper end of the internal threaded hole; a pressing head, connected with a pump body assembly passing through the movable channel, the pump body assembly is provided with an external threaded column which can be screwed into the internal threaded hole along the spiral extension groove, and a sealing structure is provided between the pump body assembly and the movable channel.

[0007] The press pump for limiting external water inflow according to the embodiment of the utility model has at least the following beneficial effects:

[0008] The pressing pump of the above structure utilizes the internal threaded hole in the middle of the threaded cover to be threadedly connected with the external threaded column on the pump body assembly to prevent the pressing head from producing a pressing action during transportation or storage. When the external threaded column is separated from the internal threaded hole, since the radial dimension of the upper port of the active channel is consistent with the nominal diameter of the internal threaded hole, that is, it matches the inner diameter dimension of the external threaded column, at this time, the gap between the upper port of the active channel and the pump body assembly is small, making it difficult for external water to enter. The problem of heavy pressing feel is alleviated by reducing the amount of external water inflow, and the sealing structure can also prevent external water from penetrating into the main body to contaminate the emulsion.

[0009] In some embodiments of the utility model, the pump body assembly includes a pipe assembly connected to the push head and movably arranged in the movable channel, the lower end of the pipe assembly is provided with a piston member matching the inner circumferential wall of the main body, the middle part of the screw cover is provided with a sleeve portion extending downward, the internal channel of the sleeve portion constitutes the movable channel, the upper end of the piston member is provided with an annular limiting groove for inserting the lower end of the sleeve portion, the sealing structure includes a sealing ring arranged in the annular limiting groove, and a first elastic member is provided between the main body and the pipe assembly to drive the sealing ring to press against the lower end surface of the sleeve portion.

[0010] In some embodiments of the utility model, the pipeline assembly includes a main column tube connected to the push head and a secondary column tube connected to the lower end of the main column tube to extend downward, the piston member is arranged on the outer periphery of the secondary column tube, the main column tube has a connecting tube portion extending inside the secondary column tube portion, the lower port of the connecting tube portion is movably provided with a plug, the plug is connected to a second elastic member, and the second elastic member drives the plug to close the lower port of the connecting tube portion.

[0011] In some embodiments of the utility model, the lower part of the connecting tube portion is in the shape of a truncated cone which is wide at the top and narrow at the bottom, and the inner circumferential wall of the upper part of the connecting tube portion is provided with a limiting protrusion, one end of the second elastic member abuts against the limiting protrusion, and the other end abuts against or is connected to the plug.

[0012] In some embodiments of the present invention, the plug is in the shape of a hemispherical shell, and the second elastic member and the plug are an integral plastic structure.

[0013] In some embodiments of the utility model, the piston member includes a circular end plate which is arranged on the outer peripheral wall of the secondary column tube member and extends radially outward, the outer peripheral wall of the circular end plate is provided with an annular shell arranged around the axial circumference of the pipeline assembly, the upper edge of the annular shell protrudes above the circular end plate to define the annular limiting groove, and the outer peripheral wall of the lower edge of the annular shell is provided with a convex ring portion which elastically abuts against the inner peripheral wall of the main body.

[0014] In some embodiments of the present invention, the circular end plate, the annular shell and the secondary column tube are an integral plastic structure.

[0015] In some embodiments of the utility model, the inner circumferential wall of the screw cap is provided with a first threaded section, the first threaded section can be screwed clockwise to the bottle body, the external threaded column can be screwed counterclockwise to the internal threaded hole, and the push head can rotate counterclockwise relative to the pump body assembly.

[0016] In some embodiments of the utility model, an outer ring sleeve is provided on the outer periphery of the upper part of the pump body assembly, and a plurality of guide ribs are distributed on the inner circumferential wall of the outer ring sleeve around the axial circumference of the pump body assembly, an acute-angle slot is formed between the guide ribs and the inner circumferential wall of the outer ring sleeve, and the side wall of the guide rib facing away from the acute-angle slot is a guide slope, and the push head is provided with a plurality of elastic cards that elastically abut against the guide slopes respectively; when the push head rotates counterclockwise, the elastic cards sequentially abut against different guide slopes to idle relative to the outer ring sleeve; when the push head rotates clockwise, the elastic cards can be inserted into the corresponding acute-angle slot to drive the outer ring sleeve to rotate.

[0017] In some embodiments of the present invention, the guide rib is in a sheet shape, and the guide rib can be elastically deformed close to the inner circumferential wall of the outer ring sleeve.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a schematic diagram of the internal cross section of an embodiment of the press pump for limiting external water inflow of the utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of partial structural decomposition in the embodiment;

[0022] Figure 3 It is a structural schematic diagram of an embodiment of a screw thread cover;

[0023] Figure 4 A schematic structural diagram of an embodiment of a sub-column pipe fitting;

[0024] Figure 5 The figure is a schematic structural diagram of an embodiment of a pressing head. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientations or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside", etc., are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] See also Figures 1 to 3 The utility model is a push pump for limiting external water inflow, comprising: a body 100, a screw cover 200 rotatably provided on the upper end of the body 100, a movable channel penetrating the middle of the screw cover 200, an inner threaded hole 210 provided on the inner circumferential wall of the movable channel, a radial dimension of the upper port of the movable channel is consistent with the nominal diameter of the inner threaded hole 210, an upper end surface of the screw cover 200 is provided with a spiral extension groove 220 connected to the upper end of the inner threaded hole 210; a press head 300, connected with a pump body assembly 400 penetrating the movable channel, the pump body assembly 400 is provided with an external threaded column 430 that can be screwed into the inner threaded hole 210 along the spiral extension groove 220, and a sealing structure 500 is provided between the pump body assembly 400 and the movable channel.

[0030] The above pressing pump uses the internal threaded hole 210 in the middle of the screw cap 200 to be threadedly connected with the external threaded column 430 on the pump body assembly 400 to prevent the pressing head 300 from generating a pressing action during transportation or storage. During assembly, the external threaded column 430 can be screwed into the internal threaded hole 210 along the spiral extension groove 220. When the external threaded column 430 is separated from the internal threaded hole 210, since the radial dimension of the upper port of the active channel is consistent with the nominal diameter of the internal threaded hole 210, that is, the radial dimension of the upper port of the active channel is almost consistent with the inner diameter dimension of the external threaded column 430, and the nominal diameter of the internal threaded hole 210 matches the outer diameter dimension of the part of the pump body assembly 400 that penetrates the active channel, at this time, the gap between the upper port of the active channel and the pump body assembly 400 is small, making it difficult for external water to enter, and the problem of heavy pressing feel is alleviated by reducing the amount of external water inflow, and the sealing structure 500 can also prevent the water entering the active channel from further penetrating into the body 100 and contaminating the lotion. In addition, the screw thread cover 200 of the above structure eliminates the need for a lock cover, reduces the number of parts of a conventional press pump, and is also beneficial to lightweight manufacturing of the press pump.

[0031] See also Figure 1 and Figure 2In some embodiments of the utility model, the pump body assembly 400 includes a pipe assembly 410 connected to the push head 300 and movably arranged in the movable channel, the lower end of the pipe assembly 410 is provided with a piston member 420 that matches the inner circumferential wall of the main body 100, the middle part of the screw cover 200 is provided with a sleeve portion 230 extending downward, the internal channel of the sleeve portion 230 constitutes the movable channel, the upper end of the piston member 420 is provided with an annular limiting groove 421 for inserting the lower end of the sleeve portion 230, the sealing structure 500 includes a sealing ring arranged in the annular limiting groove 421, and a first elastic member 600 is provided between the main body 100 and the pipe assembly 410 to drive the sealing ring to abut against the lower end surface of the sleeve portion 230. It can be understood that after the external threaded column 430 is separated from the internal threaded hole 210, under the action of the first elastic member 600, the pressing head 300 and the pump body assembly 400 move upward together to the lower end of the sleeve portion 230 and insert into the annular limiting groove 421. At this time, the sealing ring abuts against the lower end surface of the sleeve portion 230, thereby limiting the upward movement of the pressing head 300. The water entering from the active channel is blocked by the sealing ring and cannot further penetrate into the main body 100. When the pressing head 300 is not pressed downward, the amount of water contained in the active channel is very small, which has little effect on the pressing feel.

[0032] See also Figure 1 and Figure 2 In some embodiments of the utility model, the pipeline assembly 410 includes a main column pipe 411 connected to the pressing head 300 and a sub-column pipe 412 connected to the lower end of the main column pipe 411 to extend downward, the piston 420 is arranged on the outer periphery of the sub-column pipe 412, the main column pipe 411 has a connecting pipe extending inside the sub-column pipe 412, the lower end of the connecting pipe is movably provided with a plug 710, the plug 710 is connected to the second elastic member 720, and the second elastic member 720 drives the plug 710 to close the lower end of the connecting pipe. It should be noted that when the pressing head 300 is not pressed down, the plug 710 keeps the lower end of the connecting pipe closed under the action of the second elastic member 720, and when the entire pressing pump is tilted, the lotion in the body 100 cannot be discharged through the pressing head 300, thereby avoiding accidental leakage of the lotion.

[0033] See also Figure 1 and Figure 2In some embodiments of the present invention, the lower part of the connecting pipe is in the shape of a truncated cone with a wide top and a narrow bottom. The inner peripheral wall of the upper part of the connecting pipe is provided with a limiting protrusion 440. One end of the second elastic member 720 abuts against the limiting protrusion 440, and the other end abuts against or is connected to the plug 710. It can be understood that the connecting pipe and the main column pipe 411 are set as an integral structure, and the main column pipe 411 and the auxiliary column pipe 412 are separate structures to reduce the difficulty of processing. Among them, the limiting protrusion 440 slightly protrudes from the inner peripheral wall of the upper part of the connecting pipe. The end of the second elastic member 720 away from the plug 710 obliquely enters the connecting pipe and then returns to a horizontal position to abut against the limiting protrusion 440, so as to drive the plug 710 to block the lower end opening of the connecting pipe.

[0034] See also Figure 1 and Figure 2 In some embodiments of the present invention, the plug 710 is in a hemispherical shell shape, and the second elastic member 720 and the plug 710 are an integrated plastic structure. The plug 710 and the second elastic member 720 of this structure can be obtained by integral injection molding, which can reduce the number of parts, simplify the production and assembly process, and reduce costs.

[0035] See also Figure 2 In some embodiments of the present invention, the piston member 420 includes a circular end plate 422 disposed on the outer peripheral wall of the sub-column pipe member 412 and extending radially outward, the outer peripheral wall of the circular end plate 422 is provided with an annular shell 423 disposed around the axial circumference of the pipe assembly 410, the upper edge of the annular shell 423 protrudes above the circular end plate 422 to define an annular limiting groove 421, and the outer peripheral wall of the lower edge of the annular shell 423 is provided with a convex ring portion 424 elastically abutting against the inner peripheral wall of the body 100. The overall structure composed of the piston member 420 and the sub-column pipe member 412 of the above structure is simple and easy to use.

[0036] See also Figure 2 In some embodiments of the present invention, in order to reduce the number of parts, simplify the production and assembly process, and reduce costs, the circular end plate 422, the annular shell 423 and the secondary column pipe 412 are an integrated plastic structure.

[0037] See also Figure 1 , Figure 4 and Figure 5In some embodiments of the present invention, the inner peripheral wall of the screw cover 200 is provided with a first threaded section 240, the first threaded section 240 can be screwed to the bottle body in a clockwise direction, the external threaded column 430 can be screwed to the internal threaded hole 210 in a counterclockwise direction, and the pressing head 300 can rotate counterclockwise relative to the pump body assembly 400. It should be noted that in the prior art press pump, the screw cover 200 is screwed to the bottle body in a clockwise direction, and the pressing head 300 is also screwed in a clockwise direction. However, in the case where the cross section of the bottle body is rectangular, in order to prevent the pressing head 300 from protruding in the width direction of the cross section of the bottle body to occupy a larger placement space, the pressing head 300 is usually grasped so that the pressing head 300 points to the length direction of the cross section of the bottle body, and then the screw cover 200 is screwed to the bottle body in a clockwise direction. At this time, the movement of the external threaded column 430 relative to the screw cover 200 is counterclockwise rotation, so that the pressing head 300 is directly screwed out. When the pressing pump of the above structure pre-fixes the pressing head 300, when the screw cover 200 is tightened clockwise on the bottle body, the external thread column 430 will not rotate relative to the screw cover 200, and the pressing head 300 will idle counterclockwise relative to other components to adjust the angle position of the pressing head 300 when tightening the screw cover 200, which is beneficial to the storage and sales of the product.

[0038] See also Figure 4 and Figure 5 In some embodiments of the utility model, the outer periphery of the upper part of the pump body assembly 400 is provided with a circle of outer ring sleeve 413, and the inner peripheral wall of the outer ring sleeve 413 is distributed with a plurality of guide ribs 414 around the axial circumference of the pump body assembly 400, and an acute angle slot 415 is formed between the guide rib 414 and the inner peripheral wall of the outer ring sleeve 413, and the side wall of the guide rib 414 away from the acute angle slot 415 is a guide slope 416, and the head 300 is provided with a plurality of elastic cards 310 elastically abutting against the guide slope 416 respectively; it can be understood that as the head 300 rotates counterclockwise, the elastic cards 310 are switched to abut against different guide slopes 416 in turn, so as to realize the idling of the head 300 relative to the outer ring sleeve 413; and when the head 300 rotates clockwise, the elastic cards 310 can be inserted into the corresponding acute angle slot 415 to drive the outer ring sleeve 413 to rotate together. The structure is very simple, ingenious, low cost, and reliable.

[0039] See also Figure 4 and Figure 5 In some embodiments of the present invention, the guide rib 414 is in a sheet shape, and the guide rib 414 can be elastically deformed near the inner circumferential wall of the outer ring sleeve 413. When the pressing head 300 rotates counterclockwise relative to the pump body assembly 400, the guide rib 414 can also be elastically deformed, which is beneficial to reduce the elastic deformation of the elastic card 310 and extend the service life.

[0040] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A compression pump for limiting external water inflow, characterized in that: include: A body (100), wherein a screw thread cover (200) is rotatably provided at the upper end of the body (100), a movable channel is provided through the middle of the screw thread cover (200), an inner thread hole (210) is provided on the inner peripheral wall of the movable channel, a radial dimension of an upper port of the movable channel is consistent with a nominal diameter of the inner thread hole (210), and a spiral extension groove (220) connected to the upper end of the inner thread hole (210) is provided on the upper end surface of the screw thread cover (200); The push head (300) is connected to a pump body assembly that penetrates the movable channel. The pump body assembly is provided with an external threaded column (430) that can be screwed into the internal threaded hole (210) along the spiral extension groove (220). A sealing structure (500) is provided between the pump body assembly and the movable channel.

2. A press pump for limiting external water inflow according to claim 1, characterized in that: The pump body assembly comprises a pipe assembly (410) which is connected to the push head (300) and movably arranged in the movable channel. The lower end of the pipe assembly (410) is provided with a piston member (420) which matches with the inner circumferential wall of the body (100). The middle part of the screw cover (200) is provided with a sleeve portion (230) extending downward. The internal channel of the sleeve portion (230) constitutes the movable channel. The upper end of the piston member (420) is provided with an annular limiting groove (421) for the lower end of the sleeve portion (230) to be inserted. The sealing structure (500) comprises a sealing ring arranged in the annular limiting groove (421). A first elastic member (600) is provided between the body (100) and the pipe assembly (410) to drive the sealing ring to abut against the lower end surface of the sleeve portion (230).

3. A press pump for limiting external water inflow according to claim 2, characterized in that: The pipeline assembly (410) includes a main column pipe member (411) connected to the push head (300) and a sub-column pipe member (412) connected to the lower end of the main column pipe member (411) and extending downwardly, the piston member (420) is arranged on the outer periphery of the sub-column pipe member (412), the main column pipe member (411) has a connecting pipe portion extending inside the sub-column pipe member (412), the lower end of the connecting pipe portion is movably provided with a plug (710), the plug (710) is connected to a second elastic member (720), and the second elastic member (720) drives the plug (710) to close the lower end of the connecting pipe portion.

4. A press pump for limiting external water inflow according to claim 3, characterized in that: The lower part of the connecting tube is in the shape of a truncated cone which is wider at the top and narrower at the bottom. The inner peripheral wall of the upper part of the connecting tube is provided with a limiting protrusion (440). One end of the second elastic member (720) abuts against the limiting protrusion (440), and the other end abuts against or is connected to the plug (710).

5. A press pump for limiting external water inflow according to claim 4, characterized in that: The plug (710) is in the shape of a hemispherical shell, and the second elastic member (720) and the plug (710) are an integral plastic structure.

6. A press pump for limiting external water inflow according to claim 3, characterized in that: The piston member (420) includes a circular end plate (422) which is arranged on the outer peripheral wall of the secondary column pipe member (412) and extends radially outward, and the outer peripheral wall of the circular end plate (422) is provided with an annular shell (423) arranged around the axial circumference of the pipe assembly (410), and the upper edge of the annular shell (423) protrudes above the circular end plate (422) to define the annular limiting groove (421), and the outer peripheral wall of the lower edge of the annular shell (423) is provided with a convex ring portion (424) which elastically abuts against the inner peripheral wall of the body (100).

7. A press pump for limiting external water inflow according to claim 6, characterized in that: The circular end plate (422), the annular shell (423) and the secondary column pipe (412) are an integral plastic structure.

8. A press pump for limiting external water inflow according to claim 1, characterized in that: The inner peripheral wall of the screw cap (200) is provided with a first threaded section (240), and the first threaded section (240) can be screwed on the bottle body in a clockwise direction, the external threaded column (430) can be screwed on the internal threaded hole (210) in a counterclockwise direction, and the pressing head (300) can rotate counterclockwise relative to the pump body assembly.

9. A press pump for limiting external water inflow according to claim 8, characterized in that: An outer ring sleeve (413) is provided on the outer periphery of the upper part of the pump body assembly. The inner peripheral wall of the outer ring sleeve (413) is provided with a plurality of guide ribs (414) distributed around the axial circumference of the pump body assembly. An acute angle slot (415) is formed between the guide ribs (414) and the inner peripheral wall of the outer ring sleeve (413). The side wall of the guide rib (414) away from the acute angle slot (415) is a guide inclined surface (416). The pressing head (300) is provided with a plurality of guide ribs (414). The elastic cards (310) are elastically pressed against the guide bevels (416) respectively; when the push head (300) rotates counterclockwise, the elastic cards (310) sequentially press against different guide bevels (416) to rotate idly relative to the outer ring sleeve (413); when the push head (300) rotates clockwise, the elastic cards (310) can be inserted into the corresponding acute-angle slots (415) to drive the outer ring sleeve (413) to rotate.

10. A press pump for limiting external water inflow according to claim 9, characterized in that: The guide rib (414) is in the shape of a sheet, and the guide rib (414) can be elastically deformed close to the inner peripheral wall of the outer ring sleeve (413).

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