A plastic liquid dispenser

Abstract

This application provides an all-plastic liquid dispenser, including a pump body and a cap. The pump body is connected to the cap via a piston rod, the top of which is inserted into the cap. A positioning seat is fitted onto the piston rod and is located within the pump body. A return spring is provided between the cap and the positioning seat. Guide portions are provided at the bottom of the cap and the top of the positioning seat, and these guide portions are inserted into the return spring. When the cap is pressed down, the guide portions expand the return spring; when the cap is released, the return spring automatically contracts, pushing the cap upward to return to its original position. The all-plastic liquid dispenser provided in this application uses all-plastic materials for its internal parts, which avoids corrosion and fatigue aging of the original metal parts such as the return spring, extending its service life. It is also more environmentally friendly during recycling. The spring uses a hollow cylinder that cooperates with the cap and positioning seat, achieving the return function through expansion and contraction, further reducing fatigue wear of the return spring.

Description

Technical Field

[0001] This application relates to the field of liquid dispenser technology, and specifically to an all-plastic liquid dispenser. Background Technology

[0002] A liquid dispenser is a device that uses the movement of a piston within a pump body to cause gas flow inside the pump, reducing the pressure while maintaining the same pressure outside the pump body. This pressure difference guides the liquid out of the pump body. It is mainly used for storing and dispensing liquids such as cosmetics, lotions, perfumes, and water. However, existing liquid dispensers require the installation of iron springs inside, necessitating disassembly for recycling, which is inconvenient. Furthermore, the different materials of the various components of the liquid dispenser require separate recycling after disassembly, resulting in low efficiency and environmental disadvantage. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] The problem to be solved by this application is to provide an all-plastic liquid dispenser that overcomes the deficiencies of the prior art.

[0005] (II) Technical Solution

[0006] The embodiments in this specification provide the following technical solutions:

[0007] This specification provides an all-plastic liquid dispenser, including a pump body and a cap. The pump body is connected to the cap via a piston rod. The top of the piston rod is inserted into the cap, and a positioning seat is fitted onto the piston rod. The positioning seat is placed inside the pump body. A return spring is provided between the cap and the positioning seat. Guide portions are provided at the bottom of the cap and the top of the positioning seat, and the guide portions are inserted into the return spring. When the cap is pressed down, the guide portions open the return spring; when the cap is released, the return spring automatically contracts, pushing the cap upward to return to its original position.

[0008] In some embodiments, the return spring is a hollow cylinder with an opening on one side, the guide portion is frustoconical, the guide portion at the bottom of the cap faces downward, and the guide portion at the upper end of the positioning seat faces upward.

[0009] In some embodiments, the pump body is provided with a positioning groove, the positioning seat is fastened in the positioning groove, a plurality of first anti-rotation ribs are provided at equal intervals in the positioning groove, and the positioning seat is surrounded by first positioning teeth, the first anti-rotation ribs are engaged in the first positioning teeth.

[0010] In some embodiments, the top of the piston rod is provided with a second positioning tooth, and the guide portion of the cap is provided with a plurality of second anti-rotation ribs at equal intervals, the second anti-rotation ribs being engaged in the second positioning tooth.

[0011] In some embodiments, stop blocks are symmetrically provided on the outer wall of the piston rod, and a plurality of stop ribs are provided in the guide portion of the positioning seat. The stop blocks can pass through the positioning seat, and rotating the piston rod can cause the stop ribs to block the stop blocks.

[0012] In some embodiments, a piston is fitted at the bottom of the piston rod, the piston is movably mounted in the movable groove of the pump body, a one-way valve is installed in the pump body, and the pump body is fixed to the external bottle body by a shoulder sleeve.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above-mentioned technical solutions adopted in the embodiments of this specification include at least the following: the internal parts of the liquid dispenser are made of all plastic materials, which can avoid corrosion and fatigue aging of the original metal parts such as the return spring, thus extending the service life and being more environmentally friendly during recycling. The spring adopts a hollow column that cooperates with the head cap and the positioning seat, and realizes the reset function through expansion and contraction, further reducing the fatigue wear of the return spring. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a sectional view in this application;

[0017] Figure 2 This is a perspective view of the piston rod and positioning seat in this application;

[0018] Figure 3 This is a perspective view of the reset spring in this application;

[0019] Figure 4 This is a perspective view of the positioning seat in this application;

[0020] Figure 5 This is a sectional view of the pump body in this application;

[0021] Figure 6 This is a three-dimensional view of the headgear in this application;

[0022] Figure 7 This is a cross-sectional view of another embodiment in this application.

[0023] The component names corresponding to the various reference numerals in the figure are: 1. Pump body; 2. Head cap; 4. Piston rod; 5. Positioning seat; 6. Return spring; 7. Guide part; 8. Opening; 9. Positioning groove; 10. First anti-rotation rib; 11. First positioning tooth; 12. Second positioning tooth; 13. Second anti-rotation rib; 14. Stop block; 15. Stop rib; 16. Piston; 17. Movable groove; 18. One-way valve; 19. Shoulder sleeve. 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 should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0027] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0028] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0029] Combination Figures 1-7 As shown, this application provides an all-plastic liquid dispenser, including a pump body 1 and a cap 2. The pump body 1 is connected to the cap 2 via a piston rod 4, the top of which is inserted into the cap 2. When the cap 2 is pressed, the piston rod 4 can be driven to descend synchronously. A positioning seat 5 is fitted on the piston rod 4 and is placed inside the pump body 1. A return spring 6 is provided between the cap 2 and the positioning seat 5. Guide portions 7 are provided at the bottom of the cap 2 and the top of the positioning seat 5, and the guide portions 7 are inserted into the return spring 6. Specifically, the return spring 6 is made of elastic PP material, and its overall shape is a hollow cylinder with an opening 8 on one side. The guide portion 7 is frustoconical, with the guide portion 7 at the bottom of the cap 2 facing downwards and the guide portion 7 at the top of the positioning seat 5 facing upwards. Therefore, when the cap 2 is pressed down, the two guide portions 7 will open the return spring 6 through the opening 8, and the guide portion 7 will be inserted into the return spring 6. When the cap 2 is released, the return spring 6 automatically retracts and, through the cooperation of the inner wall and the guide portion 7, pushes the cap 2 to rise and return to its original position.

[0030] In some embodiments, such as Figure 2 , Figures 4-6 As shown, the pump body 1 has a positioning groove 9, and the positioning seat 5 is fastened in the positioning groove 9, preventing the positioning seat 5 from moving up and down. Multiple first anti-rotation ribs 10 are evenly spaced within the positioning groove 9, and first positioning teeth 11 are arranged around the positioning seat 5. The first anti-rotation ribs 10 engage with the first positioning teeth 11, preventing the positioning seat 5 from rotating within the positioning groove 9. The top of the piston rod 4 is surrounded by second positioning teeth 12, and multiple second anti-rotation ribs 13 are evenly spaced within the guide portion 7 of the cap 2. The second anti-rotation ribs 13 engage with... The second positioning tooth 12 prevents the cap 2 and piston rod 4 from rotating relative to each other. That is, rotating the cap 2 can drive the piston rod 4 to rotate synchronously. The outer wall of the piston rod 4 is symmetrically provided with stop blocks 14. The guide part 7 of the positioning seat 5 is provided with multiple stop ribs 15. The stop blocks 14 can pass through the positioning seat 5 in the unlocked state. At this time, the cap 2 can be pressed down to discharge liquid. After rotating the cap 2 to drive the piston rod 4 to rotate, the stop blocks 14 are aligned with the stop ribs 15. At this time, the cap 2 cannot be pressed down to discharge liquid, which is the locked state.

[0031] In some embodiments, such as Figure 1 and Figure 5 As shown, a piston 16 is fitted onto the bottom of the piston rod 4. The piston 16 is movably installed in the movable groove 17 of the pump body 1. A one-way valve 18 is installed inside the pump body 1 to provide a one-way seal. The pump body 1 is fixed to the external bottle body by a shoulder sleeve 19. In this embodiment, the one-way valve 18 is a ball valve. (See reference...) Figure 7 The one-way valve 18 can also be replaced by other one-way valve structures such as umbrella valves.

[0032] In this specification, the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the descriptions of the embodiments described later are relatively simple, and relevant parts can be referred to the descriptions of the foregoing embodiments.

[0033] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A fully plastic liquid dispenser, comprising a pump body (1) and a cap (2), characterized in that: The pump body (1) is connected to the head cap (2) via a piston rod (4). The top of the piston rod (4) is inserted into the head cap (2). A positioning seat (5) is fitted on the piston rod (4). The positioning seat (5) is placed inside the pump body (1). A return spring (6) is provided between the head cap (2) and the positioning seat (5). A guide part (7) is provided at the bottom of the head cap (2) and at the top of the positioning seat (5). The guide part (7) is inserted into the return spring (6). When the head cap (2) is pressed down, the guide part (7) opens the return spring (6). When the head cap (2) is released, the return spring (6) automatically contracts and pushes the head cap (2) to rise and return to its original position.

2. The all-plastic liquid dispenser according to claim 1, characterized in that, The reset spring (6) is a hollow cylinder with an opening (8) on one side.

3. The all-plastic liquid dispenser according to claim 1, characterized in that, The guide part (7) is truncated cone-shaped. The guide part (7) at the bottom of the cap (2) is set downwards, and the guide part (7) at the top of the positioning seat (5) is set upwards.

4. The all-plastic liquid dispenser according to claim 1, characterized in that, The pump body (1) is provided with a positioning groove (9), and the positioning seat (5) is fastened in the positioning groove (9). Multiple first anti-rotation ribs (10) are provided at equal intervals in the positioning groove (9). First positioning teeth (11) are arranged around the positioning seat (5). The first anti-rotation ribs (10) are inserted into the first positioning teeth (11).

5. The all-plastic liquid dispenser according to claim 1, characterized in that, The top of the piston rod (4) is surrounded by a second positioning tooth (12), and the guide portion (7) of the cap (2) is provided with multiple second anti-rotation ribs (13) at equal intervals. The second anti-rotation ribs (13) are inserted into the second positioning tooth (12).

6. The all-plastic liquid dispenser according to claim 1, characterized in that, The piston rod (4) has symmetrical stop blocks (14) on its outer wall. The guide part (7) of the positioning seat (5) has multiple stop ribs (15). The stop blocks (14) can pass through the positioning seat (5). Rotating the piston rod (4) can make the stop ribs (15) block the stop blocks (14).

7. The all-plastic liquid dispenser according to claim 1, characterized in that, The bottom of the piston rod (4) is fitted with a piston (16), which is movably installed in the movable groove (17) of the pump body (1).

8. The all-plastic liquid dispenser according to claim 1, characterized in that, A one-way valve (18) is installed inside the pump body (1).

9. The all-plastic liquid dispenser according to claim 1, characterized in that, The pump body (1) is fixed to the external bottle body by a shoulder sleeve (19).

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