Plastic press pump with plastic spring and reinforcing rib

Abstract

This utility model discloses an all-plastic push-button pump with a safety spring, including a bottle cap, a pump body on the bottle cap, a liquid storage chamber inside the pump body, a connecting port communicating with the liquid storage chamber, a one-way valve that controls the opening of the connecting port to allow liquid to enter the liquid storage chamber, a pumping assembly that can slide up and down relative to each other, and a locking cap that prevents the pumping assembly from detaching from the pump body. The upper end of the pumping assembly is provided with a push-button that can drive the pumping assembly downward to generate air pressure in the liquid storage chamber and squeeze the liquid in the liquid storage chamber to flow out. Between the locking cap and the push-button is a plastic spring that can spring the push-button to drive the pumping assembly upward to reset, generating negative pressure in the liquid storage chamber, causing the one-way valve to open and draw liquid into the liquid storage chamber. The plastic spring is an elastic open annular thin-walled structure that allows one end of the push-button to be inserted. A safety spring is connected between the two ends of the opening of the plastic spring. When the push-button is pressed down and squeezes the inner wall of the plastic spring, the plastic spring opens and the safety spring breaks.

Description

[Technical Field]

[0001] This utility model relates to an all-plastic push-button pump with a safety spring. [Background Technology]

[0002] In the daily chemical industry, pump dispensers are commonly used opening and closing devices for liquid product containers, and their anti-theft function has always been a key focus of the industry. Currently, the main anti-theft technologies for pump dispensers on the market, such as those disclosed in Chinese Patent Publication No. CN210823540U, involve setting an easy-tear connector on the nozzle, connecting the nozzle body and the tear ring through a convex and concave mating structure. When the pump dispenser is opened illegally, the easy-tear connector breaks, and the tear ring separates from the nozzle body, thus achieving an anti-theft effect by leaving a mark after opening. However, the drawback is that it only prevents the illegal disassembly of the nozzle from the bottle opening and does not include an anti-theft design for the pump dispenser head, leaving a risk that the dispenser head may be opened prematurely.

[0003] Therefore, to address the need for anti-theft features on the pump heads, some manufacturers have developed anti-theft emulsion pumps, such as the one disclosed in Chinese patent CN2670264Y. This design adds a safety block connected to the pump cover on the nozzle side of the pump head. When the pump head rotates in the opening direction, the safety block is dislodged by the nozzle, allowing consumers to determine if the product has been opened by observing the presence of the safety block. While this solution fills the gap in anti-theft features on the pump head, the added safety block component increases production costs. More importantly, the existing pumps all use metal springs as reset elements. The metal springs and the plastic body are difficult to recycle as a whole, requiring disassembly and separation of the metal springs and plastic parts during product recycling, which does not meet environmental protection requirements.

[0004] Therefore, this utility model was created based on the above-mentioned shortcomings. [Utility Model Content]

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an all-plastic push-pump with a safety spring that is resistant to theft and supports overall recycling.

[0006] This utility model is achieved through the following technical solution:

[0007] A fully plastic push-button pump with a safety spring includes a locking cap 1 that can be fixed to a liquid container. The locking cap 1 has a pump body 2. The pump body 2 contains a liquid storage chamber 3, a communication port 4 communicating with the liquid storage chamber 3, a one-way valve 5 that controls the opening of the communication port 4 to allow liquid to enter the liquid storage chamber 3, a pumping assembly 6 that can slide vertically relative to the liquid storage chamber 3, and a locking cap 7 that prevents the pumping assembly 6 from detaching from the pump body 2. The upper end of the pumping assembly 6 has a feature that drives the pumping assembly 6 downwards, generating air pressure to squeeze the liquid in the liquid storage chamber 3. The outflowing pressing head 8 is characterized in that: a plastic spring 9 is provided between the locking cover 7 and the pressing head 8, which can spring the pressing head 8 to drive the pumping component 6 to move upward and reset, so as to generate negative pressure in the liquid storage chamber 3, causing the one-way valve 5 to open and draw liquid into the liquid storage chamber 3. The plastic spring 9 is an elastic open annular thin-walled structure that allows one end of the pressing head 8 to be inserted. A safety rib 91 is connected between the two ends of the opening of the plastic spring 9. When the pressing head 8 is pressed down and squeezes the inner wall of the plastic spring 9, the plastic spring 9 opens and the safety rib 91 breaks.

[0008] The all-plastic push pump with safety spring as described above is characterized in that: the two ends of the opening of the plastic spring 9 are staggered to form an opening gap 92, and the safety spring 91 is provided in the opening gap 92 and its two ends are respectively connected to the inner side surface of the plastic spring 9 and the outer side surface opposite to the inner side surface.

[0009] The all-plastic push pump with safety spring as described above is characterized in that: the safety spring 91 is located away from the outlet of the opening gap 92, and the cross-sectional area of ​​the safety spring 91 gradually decreases from the inner side to the outer side of the plastic spring 9.

[0010] The all-plastic push pump with safety spring as described above is characterized in that: the plastic spring 9 includes a plurality of continuously alternating concave portions 93 and convex portions 94, wherein the concave portions 93 and convex portions 94 are arc-shaped.

[0011] The all-plastic push pump with a safety spring as described above is characterized in that: the outer side of the plastic spring 9 is provided with an outwardly protruding reinforcing rib 95.

[0012] The all-plastic push-button pump with safety spring as described above is characterized in that: the pumping assembly 6 includes a pump rod 61 with its upper end extending through the locking cover 7 and inserted into the pressing head 8 and its lower end extending into the liquid storage chamber 3, a piston 62 fitted on the pump rod 61 and movable relative to the pump rod 61 and driven by the pump rod 61, the pump rod 61 having a liquid outlet channel 611 communicating with the liquid outlet end of the pressing head 8, the lower end of the pump rod 61 having a liquid inlet 612 sealed by the piston 62, and the liquid inlet 612 opening after the pump rod 61 moves downward relative to the piston 62, allowing the liquid in the liquid storage chamber 3 to enter the liquid outlet channel 611.

[0013] The all-plastic push pump with safety spring as described above is characterized in that: the pump body 2, bottle cap 1, one-way valve 5, locking cap 7, push head 8, and pumping assembly 6 are all injection molded from plastic.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. This utility model adopts an all-plastic spring structure design, completely abandoning the traditional metal spring, avoiding the problem of metal and plastic separation and recycling, reducing recycling costs, and meeting environmental protection requirements; moreover, through the safety rib structure on the plastic spring, when the pressing head is pressed for the first time, the safety rib breaks, forming an anti-theft indicator. The overall structure is simple, eliminating additional parts such as the safety block. Through the integrated design of the plastic spring and the safety rib, the strength and stability of the plastic spring are increased, the number of parts is reduced, and the production cost is lowered.

[0016] 2. In this utility model, the concave part and convex part of the plastic spring are designed in an arc shape, combined with reinforcing ribs, which improves the structural strength while ensuring elastic restoring performance and ensuring long-term stability.

[0017] 3. In this utility model, the cross-sectional area of ​​the safety rib gradually decreases from the inner side to the outer side, which makes it easy for the end of the safety rib near the outer side to break precisely when subjected to force. Moreover, the safety rib is located far away from the outlet of the opening gap, so as to prevent the broken safety rib from getting stuck at the end of the plastic spring when the plastic spring retracts, thus ensuring the smoothness of the pressing and resetting cycle. [Attached Image Description]

[0018] Figure 1 This is a schematic diagram of the structure of this utility model when the pressing head is not pressed down;

[0019] Figure 2 This is a 3D diagram of a plastic spring in its initial state;

[0020] Figure 3 This is a top view of the plastic spring of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of this utility model when the pressing head is pressed down;

[0022] Figure 5 It is a 3D diagram of a plastic spring in its open state.

Detailed Implementation Methods

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] like Figures 1 to 5As shown, an all-plastic push-button pump with a safety spring includes a locking cap 1 that can be fixed to a liquid container. The locking cap 1 has a pump body 2. The pump body 2 has a liquid storage chamber 3, a connecting port 4 communicating with the liquid storage chamber 3, a one-way valve 5 that controls the opening of the connecting port 4 to allow liquid to enter the liquid storage chamber 3, a pumping assembly 6 that can slide up and down relative to the liquid storage chamber, and a locking cap 7 that prevents the pumping assembly 6 from detaching from the pump body 2. The upper end of the pumping assembly 6 has a feature that can drive the pumping assembly 6 downwards to generate air pressure within the liquid storage chamber 3, squeezing the liquid storage chamber. The liquid in the reservoir 3 flows out through the press head 8. Between the press head 8 and the locking cap 7, there is a plastic spring 9 that can spring the press head 8 to move the pumping assembly 6 upwards and reset, creating negative pressure in the reservoir 3. This causes the one-way valve 5 to open, drawing liquid into the reservoir 3. The plastic spring 9 is an elastic, open, annular, thin-walled structure that allows one end of the press head 8 to be inserted. A safety rib 91 connects the two ends of the opening of the plastic spring 9. When the press head 8 is pressed down and squeezes the inner wall of the plastic spring 9, the plastic spring 9 opens, causing the safety rib 91 to break. Specifically, the locking cap 1 is fixed to the mouth of the liquid container via a threaded or snap-fit ​​structure, which can be used with a toothed anti-theft design for double protection. The connecting port 4 at the bottom of the pump body 2 communicates with the liquid inside the bottle through the suction tube 10. A one-way valve 5 is installed at the connecting port 4, allowing only liquid to flow into the reservoir 3. The locking cap 7 is snapped into the pump body 2, with a central hole in its middle for the upper end of the pump rod 61 to pass through and connect with the press head 8. The lower end of the plastic spring 9 abuts against the locking cover 7, and the upper end is sleeved on the outer side of the lower end of the press head 8. When the user uses the press head 8 for the first time, pressing down on the press head 8 moves the pump rod 61 downward, squeezing the liquid in the liquid storage chamber 3 through the inlet 612 into the outlet channel 611 and out through the press head 8. At the same time, the press head 8 squeezes the inner wall of the plastic spring 9, causing the opening ring to open and the opening to expand. The safety rib 91 breaks because the force exceeds the strength threshold.

[0025] This utility model adopts an all-plastic spring structure design, completely abandoning the traditional metal spring, avoiding the problem of metal and plastic separation and recycling, reducing recycling costs, and meeting environmental protection requirements; moreover, through the safety rib structure on the plastic spring, when the pressing head is pressed for the first time, the safety rib breaks, forming an anti-theft indicator. The overall structure is simple, eliminating additional parts such as the safety block. Through the integrated design of the plastic spring and the safety rib, the strength and stability of the plastic spring are increased, the number of parts is reduced, and the production cost is lowered.

[0026] like Figure 2 and Figure 3As shown, the two ends of the opening of the plastic spring 9 intersect to form an opening gap 92. The safety rib 91 is disposed within the opening gap 92, with its two ends respectively connected to the inner side surface and the outer side surface opposite to the inner side surface of the plastic spring 9. The inner side surface of the plastic spring 9 is its side wall facing the center of the plastic spring 9, and the outer side surface of the plastic spring 9 is its other side wall away from the center of the plastic spring 9. The safety rib 91 spans the gap 92, with its two ends respectively fixedly connected to the two side walls.

[0027] Furthermore, the safety rib 91 is located away from the outlet of the opening gap 92, and the cross-sectional area of ​​the safety rib 91 gradually decreases from the inner side to the outer side of the plastic spring 9. In this invention, the cross-sectional area of ​​the safety rib gradually decreases from the inner side to the outer side, which facilitates precise breakage of the end of the safety rib near the outer side when subjected to force. Moreover, the location of the safety rib away from the outlet of the opening gap prevents the broken safety rib from jamming the end of the plastic spring when it retracts, ensuring the smoothness of the press-and-reset cycle.

[0028] In this invention, the plastic spring 9 includes multiple continuously alternating concave portions 93 and convex portions 94, which are arc-shaped. The annular wall of the plastic spring 9 forms a wave structure with the continuously arc-shaped concave portions 93 and convex portions 94, effectively enhancing the rebound force. When the pressing head 8 is pressed down, the lower end of the pressing head 8 squeezes the inner convex surface of the concave portion 93, causing the plastic spring 9 to open.

[0029] Specifically, the outer surface of the plastic spring 9 is provided with outwardly protruding reinforcing ribs 95, which improves the structural strength while ensuring elastic restoring performance and ensuring long-term stability.

[0030] In this utility model, the pumping assembly 6 includes a pump rod 61 with its upper end extending through the locking cover 7 and inserted into the pressing head 8, and its lower end extending into the liquid storage chamber 3; a piston 62 fitted on the pump rod 61 and movable relative to the pump rod 61 and driven by the pump rod 61; a liquid outlet channel 611 communicating with the liquid outlet end of the pressing head 8 is provided inside the pump rod 61; a liquid inlet 612 sealed by the piston 62 is provided at the lower end of the pump rod 61; after the pump rod 61 moves downward relative to the piston 62, the liquid inlet 612 opens, allowing the liquid in the liquid storage chamber 3 to enter the liquid outlet channel 611. When the top pressing head 8 is pressed, the pressing head 8 drives the pump rod 61, causing the pump rod 61 to move downward relative to the piston 62, opening the liquid inlet 612. Pressing the pressing head 8 again causes the pump rod 61 to drive the piston 62 downward, generating air pressure, which sends the liquid in the storage chamber 3 through the liquid inlet 612 and the liquid outlet channel 611 to the liquid outlet end of the pressing head 8. When the pressing head 8 is pressed down, causing the liquid to be pumped out, the plastic spring 9 presses the pressing head 8, causing the pump rod 61 and piston 62 to move upward and reset. A negative pressure is generated in the storage chamber 3, drawing the liquid from the product bottle for the next user.

[0031] In this utility model, the pump body 2, the bottle cap 1, the one-way valve 5, the locking cap 7, the pressing head 8, and the pumping assembly 6 are all made of plastic injection molding, realizing an all-plastic structure design, which can achieve efficient recycling and can be directly recycled without disassembly.

Claims

1. A fully plastic push-button pump with a safety spring, comprising a locking cap (1) that can be fixed to a liquid container, a pump body (2) provided on the locking cap (1), the pump body (2) having a liquid storage chamber (3), a communication port (4) communicating with the liquid storage chamber (3), a one-way valve (5) that can control the opening of the communication port (4) to allow liquid to enter the liquid storage chamber (3), a pumping assembly (6) that can slide up and down relative to each other, and a locking cap (7) that can prevent the pumping assembly (6) from detaching from the pump body (2), the upper end of the pumping assembly (6) having a push-button (8) that can drive the pumping assembly (6) downward to generate air pressure in the liquid storage chamber (3) to squeeze the liquid in the liquid storage chamber (3) out, characterized in that: Between the locking cover (7) and the pressing head (8), there is a plastic spring (9) that can spring the pressing head (8) to drive the pumping assembly (6) to move upward and reset, so that negative pressure is generated in the liquid storage chamber (3) to open the one-way valve (5) and draw the liquid into the liquid storage chamber (3). The plastic spring (9) is an elastic open annular thin-walled structure that allows one end of the pressing head (8) to be inserted. A safety rib (91) is connected between the two ends of the opening of the plastic spring (9). When the pressing head (8) is pressed down and squeezes the inner wall of the plastic spring (9), the plastic spring (9) opens and the safety rib (91) breaks.

2. The all-plastic push-pump with safety spring as described in claim 1, characterized in that: The two ends of the opening of the plastic spring (9) are staggered to form an opening gap (92). The safety rib (91) is located in the opening gap (92) and its two ends are respectively connected to the inner side of the plastic spring (9) and the outer side opposite to the inner side.

3. The all-plastic push-pump with safety spring according to claim 2, characterized in that: The safety rib (91) is located away from the outlet of the opening gap (92), and the cross-sectional area of ​​the safety rib (91) gradually decreases from the inner side of the plastic spring (9) to the outer side.

4. The all-plastic push-pump with safety spring as described in claim 1, characterized in that: The plastic spring (9) includes a plurality of continuously alternating concave portions (93) and convex portions (94), wherein the concave portions (93) and convex portions (94) are arc-shaped.

5. The all-plastic push-button pump with safety spring as described in claim 1, characterized in that: The outer surface of the plastic spring (9) is provided with outwardly protruding reinforcing ribs (95).

6. The all-plastic push-pump with safety spring as described in claim 1, characterized in that: The pumping assembly (6) includes a pump rod (61) with its upper end extending through the locking cap (7) and inserted into the pressing head (8) and its lower end extending into the liquid storage chamber (3), and a piston (62) fitted on the pump rod (61) and capable of moving relative to the pump rod (61) and driven by the pump rod (61). The pump rod (61) is provided with a liquid outlet channel (611) communicating with the liquid outlet end of the pressing head (8). The lower end of the pump rod (61) is provided with a liquid inlet (612) sealed by the piston (62). After the pump rod (61) moves downward relative to the piston (62), the liquid inlet (612) opens, allowing the liquid in the liquid storage chamber (3) to enter the liquid outlet channel (611).

7. The all-plastic push-pump with safety spring as described in claim 1, characterized in that: The pump body (2), bottle cap (1), one-way valve (5), locking cap (7), pressing head (8), and pumping assembly (6) are all made of plastic injection molding.

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