Gasket-free pump head

Abstract

The utility model discloses a gasket-free pump head, which comprises a lock cover and a pump core arranged in the lock cover, the lock cover is of a stepped hollow tubular structure, a first hollow pipe is arranged at the upper end of the lock cover, a second hollow pipe is arranged on an inner cavity below the lock cover, the outer end part of the second hollow pipe is flush with one end of the lock cover, and the pump core is arranged in the lock cover. The second hollow pipe is communicated with the first hollow pipe, a protruding ring is arranged on the inner wall of the first hollow pipe, an assembling groove is formed by the protruding ring and the inner face of the lock cover, and the pump core is locked in the assembling groove. The pump core is assembled in the lock cover from top to bottom, the pump core is fixed in the lock cover through clamping matching of the clamping ring and the assembling groove, the sealing face is arranged below the inner face of the lock cover, the sealing face can be attached to a bottle opening to achieve the sealing effect when the bottle lock is used in cooperation with a bottle, a gasket is omitted compared with a traditional pump core, and production cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of pump bodies, in particular to a gasket-free pump head. Background Art

[0002] Pump heads (vacuum pumps, lotion pumps, etc.) are usually used to pump out lotions or pastes in daily cleaning and skin care products such as hand soap, shower gel, and facial cleanser, and are widely used in daily life.

[0003] For example, the Chinese utility model patent with publication number CN218705308U discloses a bead-blasting vacuum pump that can realize the bead-blasting function. However, from the drawings in its specification, Figure 1 (Attached to this application specification Figure 1 As can be seen from the extra circled part in the figure, the pump core is assembled and fixed in the lock cover from bottom to top. When used with the bottle, the bottom of the pump core will contact the bottle mouth, so it is necessary to install a gasket between the pump core and the lock cover to ensure the sealing of the pump head, which will undoubtedly increase the production cost of the pump head; and the gasket is a soft structure, and the sealing will deteriorate after long-term use. Utility Model Content

[0004] The utility model aims to solve at least one problem existing in the prior art. To this end, the purpose of the utility model is to provide a gasket-free pump head.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A gasketless pump head comprises a locking cover and a pump core arranged in the locking cover, the locking cover is a stepped hollow tubular structure, a first hollow tube is arranged at the upper end of the locking cover, a second hollow tube is arranged on the inner cavity below the locking cover, the outer end of the second hollow tube is flush with one end of the locking cover, the second hollow tube is connected with the first hollow tube, a convex ring is arranged on the inner wall of the first hollow tube, the convex ring and the inner surface of the locking cover form an assembly groove, and the pump core is locked in the assembly groove.

[0007] As a further optimization scheme of the utility model, the pump core includes a main body, the outer wall of the main body is tightly matched with the inner wall of the second hollow tube, and a clamping ring extending outward is provided at one end of the main body, and the clamping ring is used in conjunction with the assembly groove and installed in the assembly groove.

[0008] As a further optimization solution of the present utility model, the lower end surface of the clamping ring is an arc surface.

[0009] As a further optimization solution of the present invention, a sealing surface is provided below the inner surface of the lock cover, and the sealing surface surrounds the outer wall of the second hollow tube.

[0010] As a further optimization scheme of the utility model, the pump core also includes a water sealing plate, a valve needle, a piston, a first spring, a connecting ring, a milk discharge rod and a second spring. The water sealing plate is sealed in the main body, the valve needle is clamped in the milk discharge rod and is located in the main body, the piston is sleeved on the valve needle and fits tightly with the inner wall of the main body, the first spring is arranged in the milk discharge rod, and one end is in conflict with the milk discharge rod, and the other end is in conflict with the piston, the connecting ring is clamped on the main body, the milk discharge rod is arranged in the main body and the connecting ring and is locked in the connecting ring by a hook, one end of the second spring is in conflict with the clamping ring of the milk discharge rod, and the other end is in conflict with the connecting ring.

[0011] Beneficial effects of the utility model:

[0012] The pump core of the utility model is assembled in the lock cover from top to bottom, and the pump core is fixed in the lock cover by the snap fit between the snap ring and the assembly groove. A sealing surface is provided at the lower inner surface of the lock cover, and the sealing surface will fit with the bottle mouth to seal when used with the bottle. Compared with the traditional pump core, the gasket is removed, thereby saving production costs.

[0013] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the gasket-free pump head of the utility model;

[0015] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0016] Figure 3 It is an exploded sectional view of the pump core of the utility model.

[0017] In the figure: 1. lock cover, 11. first hollow tube, 12. second hollow tube, 13. convex ring, 14. assembly groove, 15. sealing surface, 16. arc surface; 2. pump core, 21. main body, 211. retaining ring, 22. water sealing plate, 23. valve needle, 24. piston, 25. first spring, 26. connecting ring, 27. nipple rod, 28. second spring, 29. hook. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices consistent with some aspects of the present application as detailed in the appended claims.

[0020] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which the utility model belongs. The words "one" or "one" and the like used in the specification and claims of this application do not indicate a quantitative limitation, but indicate the existence of at least one. "Multiple" includes two, which is equivalent to at least two. "Including" or "including" and the like mean that the elements or objects appearing in front of "including" or "including" include the elements or objects listed after "including" or "including" and their equivalents, and do not exclude other elements or objects. "Connected" or "connected" and the like are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect. The singular forms of "one", "said" and "the" used in the specification and the appended claims of this application are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0021] like Figure 1-3As shown, a gasket-free pump head includes a locking cover 1 and a pump core 2 disposed in the locking cover 1. The locking cover 1 is a stepped hollow tubular structure. A first hollow tube 11 is disposed on the upper end of the locking cover 1, and a second hollow tube 12 is disposed on the inner cavity below the locking cover 1. The locking cover 1, the first hollow tube 11 and the second hollow tube 12 are an integrated structure formed by integral injection molding. The outer end of the second hollow tube 12 is flush with one end of the locking cover 1, and the second hollow tube 12 is connected to the first hollow tube 11. A convex ring 13 is disposed on the inner wall of the first hollow tube 11, and an assembly groove 14 is formed between the convex ring 13 and the inner surface of the locking cover 1. The pump core 2 is locked in the assembly groove 14 through the convex ring 13. The pump core 2 includes a main body 21, and the outer wall of the main body 21 is tightly matched with the inner wall of the second hollow tube 12. A snap ring 211 extending outward is disposed at one end of the main body 21, and the snap ring 211 is used in conjunction with the assembly groove 14 and is installed. In the assembly groove 14, a sealing surface 15 is provided below the inner surface of the lock cover 1, and the sealing surface 15 surrounds the outer wall of the second hollow tube 12. The pump core 2 is fixed in the lock cover 1 by the snap fit of the snap ring 211 and the assembly groove 14. A sealing surface 15 is provided below the inner surface of the lock cover 1. When used with a bottle, the sealing surface 15 will fit with the bottle mouth to seal. Compared with the traditional pump core 2, the gasket is removed, which saves production costs. In addition, the sealing surface 15 has a longer service life than the gasket and a better sealing effect.

[0022] Furthermore, the lower end surface of the snap ring 211 is an arc surface 16 , and the design of the arc surface 16 facilitates the installation of the snap ring 211 (pump core 2 ) into the assembly groove 14 .

[0023] Furthermore, the pump core 2 also includes a water sealing plate 22, a valve needle 23, a piston 24, a first spring 25, a connecting ring 26, a milk discharge rod 27 and a second spring 28. The water sealing plate 22 is sealed in the main body 21, the valve needle 23 is clamped in the milk discharge rod 27 and is located in the main body 21, the piston 24 is sleeved on the valve needle 23 and is tightly fitted with the inner wall of the main body 21, the first spring 25 is arranged in the milk discharge rod 27, and one end thereof is in conflict with the milk discharge rod 27, and the other end is in conflict with the piston 24, the connecting ring 26 is clamped on the main body 21, the milk discharge rod 27 is arranged in the main body 21 and the connecting ring 26 and is locked in the connecting ring 26 by a hook 29, and one end of the second spring 28 is in conflict with the retaining ring 211 of the milk discharge rod 27, and the other end is in conflict with the connecting ring 26. Specifically, the pump core 2 in the present application uses a double spring as the power. When pressing to discharge the material, the cooperation of the double springs makes the pump head have a stronger explosiveness, and the liquid material can be better atomized; and the double springs are both located outside the valve needle 23, that is, both springs are external springs, and the external springs ensure that the material will not be contaminated during the discharge process.

[0024] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A gasketless pump head, comprising a locking cover and a pump core disposed in the locking cover, wherein the locking cover is a stepped hollow tubular structure, characterized in that: A first hollow tube is provided at the upper end of the locking cover, a second hollow tube is provided on the inner cavity below the locking cover, the outer end of the second hollow tube is flush with one end of the locking cover, the second hollow tube is connected to the first hollow tube, a convex ring is provided on the inner wall of the first hollow tube, the convex ring and the inner surface of the locking cover form an assembly groove, and the pump core is locked in the assembly groove.

2. The gasketless pump head according to claim 1, characterized in that: The pump core comprises a main body, the outer wall of the main body is tightly matched with the inner wall of the second hollow tube, and one end of the main body is provided with a clamping ring extending outward, and the clamping ring is used in conjunction with the assembly groove and is installed in the assembly groove.

3. The gasketless pump head according to claim 2, characterized in that: The lower end surface of the clamping ring is an arc surface.

4. The gasketless pump head according to claim 3, characterized in that: A sealing surface is arranged below the inner surface of the lock cover, and the sealing surface surrounds the outer wall of the second hollow tube.

5. The gasketless pump head according to claim 4, characterized in that: The pump core also includes a water sealing plate, a valve needle, a piston, a first spring, a connecting ring, a milk discharge rod and a second spring. The water sealing plate is sealed in the main body, the valve needle is clamped in the milk discharge rod and is located in the main body, the piston is sleeved on the valve needle and fits tightly with the inner wall of the main body, the first spring is arranged in the milk discharge rod, and one end of the first spring is in conflict with the milk discharge rod, and the other end is in conflict with the piston, the connecting ring is clamped on the main body, the milk discharge rod is arranged in the main body and the connecting ring and is locked in the connecting ring by a hook, one end of the second spring is in conflict with the clamping ring of the milk discharge rod, and the other end is in conflict with the connecting ring.

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