All-plastic foam pump

Abstract

The utility model provides an all-plastic foam pump which comprises a pump body and a piston installed in the pump body, the upper end of the piston is connected with a net joint, the lower end of the piston is connected with a piston rod, the bottom of the piston rod is connected with a lower piston, and the piston rod is located at the upper end of the lower piston and sleeved with a spring seat. The piston rod is sleeved with a spring and abuts against the spring seat, a sealing ball is further arranged at the bottom of the pump body, and a head cap is connected to the upper portion of the piston. According to the all-plastic foam pump, the piston can be directly assembled on the piston rod, a piston seat does not need to be additionally arranged, the structure is simpler, cost and assembly time are saved, the spring is made of plastic materials, the environment-friendly effect is achieved, in addition, an existing valve block used for sealing can be replaced by the mode that the piston rod is directly sealed through the net communication seat and the piston, and the cost is reduced. Fatigue failure of the valve plate after long-term use is avoided, and the service life of the foam pump is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to foam pump technical field especially relates to a full plastic foam pump. BACKGROUND

[0002] Foam pump is widely used in hand washing liquid, shower gel, face washing liquid and other products, the principle of foam pump is that hand washing liquid, shower gel or face washing liquid and gas are mixed to generate foam and then pumped out. The existing foam pump needs to use spring and other various metal parts, which is easy to rust and not conducive to environmental protection. The piston rod in the foam pump needs to connect the piston through the piston seat to achieve the liquid output effect. This structure has large manufacturing cost, more workpieces and difficult assembly. In addition, the valve plate used for sealing is easy to deform and fail after long-term use, which leads to poor liquid output effect and short service life. SUMMARY

[0003] (I) Technical problem to be solved

[0004] The utility model wants to solve the problem of providing a full plastic foam pump to overcome the defects of complex assembly and short service life of the foam pump in the prior art.

[0005] (II) Technical scheme

[0006] In order to solve the technical problem, the utility model provides a full plastic foam pump, which comprises a pump body and a piston installed in the pump body, the upper end of the piston is connected with a mesh, the lower end is connected with a piston rod, the bottom of the piston rod is connected with a lower piston, the upper end of the lower piston is sleeved with a spring seat, the spring is sleeved on the piston rod and abuts on the spring seat, the bottom of the pump body is also provided with a sealing ball, and the upper side of the piston is connected with a head cap; the head cap is pressed down, the piston is closed, the sealing ball closes the bottom of the pump body, the head cap drives the piston and the piston rod to continue to descend, the piston rod is separated from the lower piston, and the bottom of the piston rod and the head cap form an air outlet channel, so that the gas in the pump body can be discharged from the head cap, and the liquid in the bottle body can be sucked into the piston rod from the pump body after multiple pressing.

[0007] In some embodiments, a stop portion is provided in the pump body, the edge of the spring seat abuts on the stop portion, and the bottom of the piston rod can slide relative to the lower piston and is provided with an opening communicating with the air outlet channel.

[0008] In some embodiments, a valve plate is inserted into the piston, the surface of the valve plate is annular, the surface of the valve plate is composed of a first sealing portion and a second sealing portion, the first sealing portion is attached to the piston rod, the second sealing portion is attached to the piston, the mesh is inserted into the top of the piston, the head cap is sleeved on the upper end of the piston, and the piston rod is inserted into the lower end of the piston.

[0009] In some embodiments, the upper end of the piston is sleeved with a mesh seat, the mesh is inserted into the upper end of the mesh seat, the piston rod is inserted into the lower end of the mesh seat, a plurality of vent holes are arranged around the piston, the lower end of the vent hole is provided with a tapered sealing ring, the mesh seat is provided with a first sealing position and a second sealing position, the sealing ring is attached to the first sealing position, the piston is provided with a sealing column, the sealing column is attached to the second sealing position, and the inner wall of the mesh seat is further provided with a plurality of grooves in communication with the gas outlet channels in the piston rod.

[0010] In some embodiments, the spring is made of plastic material, the spring includes a plurality of support rings, the support rings are connected by elastic ribs symmetrically arranged at the center of the two sides, the spring includes three support rings arranged at equal intervals, and the support rings at the top and the bottom are connected by elastic ribs symmetrically arranged at the center of the two sides.

[0011] (III) Beneficial effects

[0012] The full-plastic foam pump can directly assemble the piston on the piston rod without the need of adding a piston seat, has a more simple structure, saves cost and assembly time, and uses plastic material for the spring to play an environmental protection role. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0014] Figure 1 It is a sectional view of the full-plastic foam pump of the utility model;

[0015] Figure 2 It is a perspective view of the piston rod and the valve piece of the full-plastic foam pump of the utility model;

[0016] Figure 3 It is a perspective view of the spring of the full-plastic foam pump of the utility model;

[0017] Figure 4 It is another perspective view of the spring of the full-plastic foam pump of the utility model;

[0018] Figure 5 It is a perspective view of the full-plastic foam pump of the utility model Figure 1 It is an enlarged view of A part in the middle

[0019] Figure 6 This is a cross-sectional view of a second embodiment of the all-plastic foam pump of this utility model;

[0020] Figure 7 This is a perspective view of the internal structure of a second embodiment of the all-plastic foam pump of this utility model;

[0021] Figure 8 This is a perspective view of the piston in Embodiment 2 of the all-plastic foam pump of this utility model;

[0022] Figure 9 This is a perspective view of the mesh base of a second embodiment of the all-plastic foam pump of this utility model.

[0023] The component names corresponding to the various reference numerals in the figure are as follows: 1. Pump body; 2. Piston; 3. Mesh connector; 4. Piston rod; 5. Lower piston; 6. Spring seat; 7. Spring; 8. Sealing ball; 9. Head cap; 10. Stop part; 11. Opening; 12. Valve plate; 13. First sealing part; 14. Second sealing part; 15. Mesh connector seat; 16. Vent hole; 17. Sealing ring; 18. Support ring; 19. Elastic rib; 20. Second sealing position; 21. Groove; 22. Sealing column; 23. First sealing position. Detailed Implementation

[0024] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0025] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] It is to be appreciated that the various aspects described herein are capable of implementation by various types of structures and / or functionality. For example, one or more of the aspects described herein can be implemented by hardware alone (e.g., by an application-specific integrated circuit), by software alone (e.g., by a software implementation in C, or another programming language), or by a combination of both hardware and software (e.g., a suitably programmed computer system). Thus, the disclosure is not limited to any particular type of implementation or structure.

[0027] It is also important to note that the present application can be implemented in various manners. Accordingly, the embodiments provided in the following should be regarded as being illustrative, rather than restrictive.

[0028] Furthermore, in the following description, numerous specific details are provided in order to provide a thorough understanding of the examples. One skilled in the relevant art will recognize, however, that the application can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth.

[0029] Embodiment One:

[0030] Reference is made to Figures 1-5The utility model provides a kind of full plastic foam pump, including pump body 1 and the piston 2 of being installed in pump body 1, the upper end of piston 2 is connected with net pass 3, and the lower end is connected with piston rod 4;Specifically, valve sheet 12 is inserted in piston 2, the surface of valve sheet 12 is circular ring, the surface of valve sheet 12 is made of first sealing portion 13 and second sealing portion 14, first sealing portion 13 sticks piston rod 4, and second sealing portion 14 sticks piston 2, and the top of piston 2 inserts net pass 3, and piston rod 4 is inserted in the lower end of piston 2;The bottom of piston rod 4 is connected with lower piston 5, and the upper end of lower piston 5 is sleeved with spring seat 6, and spring 7 is sleeved on piston rod 4 and abuts on spring seat 6, and the bottom of pump body 1 is also provided with sealing ball 8, and the upper side of piston 2 is connected with head cap 9;When using, press down head cap 9, and net pass 3 and piston 2 are closed by second sealing portion 14, sealing ball 8 seals the bottom of pump body 1, and continue to press down head cap 9 to drive piston 2 and piston rod 4 to descend, due to the friction of the side wall of pump body 1 and piston rod 4, piston rod 4 is separated from lower piston 5, because the bottom of piston rod 4 can slide relative to lower piston 5 and is provided with the opening 11 that is connected with outlet passage, so outlet passage is formed between the bottom of piston rod 4 and head cap 9 by opening 11 after piston rod 4 moves relative to lower piston 5, at this time, the gas in pump body 1 can be discharged from head cap 9, and the liquid in bottle body flows into pump body 1 while the air in pump body 1 is discharged by pressing head cap 9 multiple times, so as to enter piston rod 4 after sealing ball 8 is opened, and finally is sprayed from head cap 9 along outlet passage;And in the pressing process, first sealing portion 13 is separated from piston rod 4 after being pressed, at this time, the air in pump body 1 can enter piston rod 4, so as to be mixed with the liquid entering piston rod 4, and the net object is assembled at net pass 3, which can change the passing gas-liquid mixture into foam, and finally realize that foam is sprayed from head cap 9.

[0031] In some embodiments, as shown in Figures 1-5 The bottom of spring 7 is limited by stop portion 10 in pump body 1, so as to reset with spring 7, and the edge of spring seat 6 abuts on stop portion 10, and spring 7 is plastic material in the present instance, and spring 7 includes a plurality of support rings 18, and the elastic rib 19 of bilateral center symmetry is connected between support ring 18, and the spring 7 can also include three support rings 18 arranged at equal intervals, and the elastic rib 19 of bilateral center symmetry is connected between the support ring 18 of top and bottom, and the specific structure of plastic spring can be changed according to actual needs.

[0032] The full plastic foam pump can directly assemble piston on piston rod, without adding piston seat, so that the structure is more simple, the cost and assembly time are saved, and the spring is plastic material, so that the environmental protection effect is achieved.

[0033] Embodiment two:

[0034] Referring to Figures 6-9 The difference between the embodiment and the embodiment one is that the upper end of the piston 2 is sleeved with a net through seat 15, the net through 3 is inserted into the upper end of the net through seat 15, the piston rod 4 is inserted into the lower end of the net through seat 15, a plurality of air vents 16 are arranged around the piston 2, the lower end of the air vent 16 is provided with a tapered sealing ring 17, the net through seat 15 is provided with a first sealing position 23 and a second sealing position 20, the sealing ring 17 is attached to the first sealing position 23, the piston 2 is provided with a sealing column 22, the sealing column 22 is attached to the second sealing position 20, the inner wall of the net through seat 15 is further provided with a plurality of grooves 21, the grooves 21 are communicated with the gas outlet channels in the piston rod 4, the piston rod 4 is sealed with the net through seat 15 and the piston 2 through the sealing ring 17, and the valve plate is omitted, so that the sealing failure of the structure after long-term use is avoided, in the pressing process of the head cap 9, the gas in the pump body 1 enters the upper end of the piston 2 through the air vent 16, the sealing ring 17 is deformed and separated from the second sealing position 23 on the net through seat 15 after the gas pressure is formed, at this time, the gas can enter the piston rod 4 along the grooves 21 in the inner wall of the net through seat 15, and can also be mixed with the liquid in the piston rod 4, and the foam formed after passing through the net through 3 is sprayed out of the head cap 9.

[0035] In the embodiment, the existing valve plate for sealing can be replaced by the net through seat and the piston directly sealing the piston rod, the fatigue failure of the valve plate after long-term use is avoided, and the service life of the foam pump is prolonged.

[0036] The above only describes the preferred embodiments of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A full-plastic foam pump, comprising a pump body (1) and a piston (2) installed within the pump body (1), characterized in that: The piston (2) is connected to a network (3) at its upper end and to a piston rod (4) at its lower end. The piston rod (4) is connected to a lower piston (5) at its bottom. A spring seat (6) is fitted on the upper end of the piston rod (4) above the lower piston (5). A spring (7) is fitted on the piston rod (4) and abuts against the spring seat (6). A sealing ball (8) is also provided at the bottom of the pump body (1). A cap (9) is connected above the piston (2). When the cap (9) is pressed down, the piston (2) is closed. The sealing ball (8) closes the bottom of the pump body (1). The cap (9) drives the piston (2) and the piston rod (4) to continue to descend. The piston rod (4) disengages from the lower piston (5). An air outlet channel is formed between the bottom of the piston rod (4) and the cap (9), which can discharge the gas in the pump body (1) from the cap (9).

2. The all-plastic foam pump as described in claim 1, characterized in that: The pump body (1) is provided with a stop part (10), and the edge of the spring seat (6) abuts against the stop part (10).

3. The all-plastic foam pump as described in claim 2, characterized in that: The bottom of the piston rod (4) can slide relative to the lower piston (5) and is provided with an opening (11) that connects to the air outlet passage.

4. The all-plastic foam pump as described in claim 1, characterized in that: A valve plate (12) is inserted inside the piston (2). The surface of the valve plate (12) is annular. The surface of the valve plate (12) is composed of a first sealing part (13) and a second sealing part (14). The first sealing part (13) is attached to the piston rod (4), and the second sealing part (14) is attached to the piston (2).

5. The all-plastic foam pump as described in claim 4, characterized in that: The top of the piston (2) is fitted with the network connector (3), the cap (9) is fitted onto the upper end of the piston (2), and the piston rod (4) is fitted onto the lower end of the piston (2).

6. The all-plastic foam pump as described in claim 1, characterized in that: The upper end of the piston (2) is fitted with a network connector (15), the network connector (3) is inserted into the upper end of the network connector (15), and the piston rod (4) is inserted into the lower end of the network connector (15).

7. The all-plastic foam pump as described in claim 6, characterized in that: The piston (2) is provided with a plurality of vent holes (16) around its perimeter. The lower end of each vent hole (16) is provided with a conical sealing ring (17). The mesh seat (15) is provided with a first sealing position (23) and a second sealing position (20). The sealing ring (17) fits into the first sealing position (23). The piston (2) is provided with a sealing post (22). The sealing post (22) fits into the second sealing position (20). The inner wall of the mesh seat (15) is also provided with a plurality of grooves (21). The grooves (21) are connected to the air outlet channel in the piston rod (4).

8. The all-plastic foam pump as described in claim 1, characterized in that: The spring (7) is made of plastic.

9. The all-plastic foam pump as described in claim 1, characterized in that: The spring (7) includes a plurality of support rings (18), which are connected by elastic ribs (19) that are symmetrical about the center on both sides.

10. The all-plastic foam pump as described in claim 1, characterized in that: The spring (7) includes three support rings (18) arranged at equal intervals, and the top and bottom support rings (18) are connected by elastic ribs (19) that are symmetrical on both sides.

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