A down-locking all-plastic press pump

Abstract

The utility model discloses a kind of lower lock type full plastic press pumps, comprising: pump shell, pump chamber is equipped in pump shell, the lower end of pump chamber is equipped with first check valve;Pump pipe, it is slidably arranged in pump chamber, and its lower end is equipped with second check valve;Piston, it is sleeved in the lower part of pump pipe;Rotary seat, it is connected in pump shell by screw thread, and can be lifted in it Adjustment;Guide cover, it is fixedly connected or integrally connected in the upper end outer side periphery of pump pipe;Elastic reset piece, it is arranged between rotary seat and guide cover;Circumferential limiting structure, it is arranged between guide cover and rotary seat;Wherein, in the state that pump pipe is under depression, by rotating pump pipe, rotary seat is driven to move downwards, so that the distance between rotary seat and guide cover increases, so that elastic reset piece keeps relaxed state.The utility model has the advantages of simple structure, convenient operation, and can effectively avoid the advantages that elastic reset mechanism is invalid due to long time pressure.

Description

Technical Field

[0001] This utility model relates to the field of push pump technology, and in particular to a bottom-locking all-plastic push pump. Background Technology

[0002] Conventional emulsion pumps typically incorporate an internal resilient reset mechanism, such as a spring. During product transportation, storage, and sales, to prevent the pump from being pressed unexpectedly and causing leakage, locking mechanisms are usually required. Currently, there are two main types of locking methods:

[0003] 1. Adding a clamp: By adding an external clamp to the pump head or pressing part of the pump, movement is restricted, thus preventing accidental pressing. However, this method requires more storage space, especially in the vertical direction, increasing packaging and transportation costs.

[0004] 2. Press-down locking: This method involves pressing the pump head or pressing component of the pump down to its lowest position and locking it, preventing it from moving upwards. While this effectively prevents accidental pressing, it causes the internal elastic reset mechanism to remain compressed for extended periods. Since the elastic reset mechanism is typically made of elastic material, prolonged pressure can cause it to yield and deform, reducing its elasticity and even leading to permanent deformation. This affects the pump's lifespan and pressing performance, ultimately causing the pump to fail.

[0005] In addition, some lockable push pumps, although they have a locking function, have a complex locking structure, are inconvenient to operate, and have a poor user experience.

[0006] Therefore, it is necessary to further improve and perfect the existing technology to overcome these shortcomings, and this utility model is made based on this situation. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a lockable all-plastic push pump that is simple in structure, easy to operate, and can effectively prevent the elastic reset mechanism from failing due to prolonged pressure.

[0008] This utility model is achieved through the following technical solution:

[0009] To solve the above-mentioned technical problems, this utility model provides a bottom-locking all-plastic push-button pump, comprising:

[0010] A pump casing, wherein a pump chamber is provided inside the pump casing, and a first one-way valve is provided at the lower end of the pump chamber;

[0011] The pump pipe is slidably disposed in the pump chamber and has a hollow structure, with a second one-way valve at its lower end;

[0012] The piston is fitted onto the lower part of the pump tube and divides the pump chamber into upper and lower chambers;

[0013] A rotating seat is threadedly connected inside the pump housing and can be adjusted up and down within it;

[0014] The guide cover is fixedly or integrally connected to the outer periphery of the upper end of the pump pipe and extends downward.

[0015] An elastic reset element is disposed between the rotating seat and the guide cover;

[0016] A circumferential limiting structure is disposed between the guide cover and the rotating seat to limit the relative circumferential rotation between the two;

[0017] When the pump tube is under pressure, rotating the pump tube causes the rotating seat to move downward, increasing the distance between the rotating seat and the guide cover, thereby keeping the elastic reset member in an extended state.

[0018] To further address the technical problems addressed by this utility model, a bottom-locking all-plastic push-button pump is provided, wherein the inner wall of the pump housing is provided with an internal thread, and the outer wall of the rotating seat is provided with a protrusion, the protrusion engaging with the internal thread to achieve spiral lifting and lowering along the internal thread.

[0019] To further address the technical problem to be solved by this utility model, the present utility model provides a bottom-locking all-plastic push pump in which a locking groove is provided on the inner side wall of the pump housing. The opening of the locking groove faces upward and is located at the upper end of the internal thread, and is circumferentially offset from the screw entrance at the upper end of the internal thread. The protrusion can be engaged into the corresponding locking groove to achieve locking.

[0020] To further solve the technical problem to be solved by this utility model, this utility model provides a bottom-locking all-plastic push pump in which the guide cover is inserted into the rotating seat, and the circumferential limiting structure includes an axial limiting groove provided on the outer side wall of the guide cover and an axial limiting protrusion provided on the inner side wall of the rotating seat. The limiting protrusion is inserted into the corresponding limiting groove so that the guide cover and the rotating seat rotate synchronously.

[0021] To further address the technical problems to be solved by this utility model, this utility model provides a bottom-locking all-plastic push pump in which the elastic reset element is a plastic spring, and the push pump is made of all-plastic material.

[0022] In order to further solve the technical problem to be solved by this utility model, the present utility model provides a bottom-locking all-plastic push pump in which the elastic reset member is a hollow ellipsoid and has several side openings on the side walls at its upper and lower ends.

[0023] In order to further solve the technical problem to be solved by this utility model, the present utility model provides a bottom-locking all-plastic push pump in which the outer side wall of the upper end of the pump tube gradually slopes outward from bottom to top, and the outer side wall of the upper end of the pump tube and the guide cover form a first receiving groove for accommodating the upper end of the elastic reset member.

[0024] To further solve the technical problem to be solved by this utility model, this utility model provides a bottom-locking all-plastic press pump in which an upwardly extending inner cover is provided on the periphery of the inner side of the lower end of the rotating seat. The inner cover is inclined from bottom to top and towards the middle. The inner wall of the lower end of the inner cover and the guide cover forms a second receiving groove for accommodating the lower end of the elastic reset member.

[0025] To further solve the technical problem to be solved by this utility model, this utility model provides a bottom-locking all-plastic push pump in which the second one-way valve includes a liquid outlet head provided at the lower end of the pump tube. The liquid outlet head is provided with a liquid inlet that communicates with the inner cavity of the pump tube. The piston is movably sleeved on the pump tube and can rise and fall relative to the pump tube. It can seal the liquid inlet when the pump tube rises and open the liquid inlet when the pump tube falls.

[0026] In order to further solve the technical problem to be solved by this utility model, the present utility model provides a bottom-locking all-plastic push pump, wherein the upper end of the pump casing is also provided with a fixing cover for restricting the rotating seat from detaching upwards.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] The main innovation of this novel bottom-locking all-plastic push-button pump lies in its rotary locking structure. This structure, through internal threads and locking grooves within the pump housing, combined with protrusions on the rotating seat, achieves the locking function of the push-button pump. This design not only effectively prevents accidental pressing but also keeps the elastic reset component in an extended state when locked, avoiding the problem of failure due to prolonged pressure, significantly extending its service life. It also reduces the overall height, facilitating packaging and transportation. Furthermore, the simple design and convenient operation, combined with the use of all-plastic materials, further reduce production costs and product weight, enhancing market competitiveness. Attached Figure Description

[0029] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0030] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0031] Figure 2 This is an exploded view of the present invention;

[0032] Figure 3This is an exploded view of the present invention;

[0033] Figure 4 This is a cross-sectional view of the pump casing;

[0034] Figure 5 This is one of the cross-sectional views of this utility model (pump pipe in the pop-up state);

[0035] Figure 6 This is a second cross-sectional view of the present invention (pump pipe under pressure state);

[0036] Figure 7 This is the third sectional view of the present invention (pump pipe locked state). Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] like Figures 1 to 7 As shown, this embodiment provides a bottom-locking all-plastic push pump, which mainly includes a pump housing 1, a pump pipe 2, a piston 3, a rotating seat 4, an elastic reset component 5, and a circumferential limiting structure.

[0039] The pump casing 1 is the main structure of the press pump, and a pump chamber 11 is provided inside it. A first one-way valve 12 is provided at the lower end of the pump chamber 11. In this embodiment, the first one-way valve 12 can adopt a common one-way valve structure such as an umbrella valve or a duckbill valve. Its function is to allow liquid to enter the pump chamber 11 from the outside only and prevent liquid backflow.

[0040] The pump pipe 2 is slidably disposed within the pump chamber 11 and has a hollow structure. A second one-way valve 21 is provided at its lower end. In this embodiment, the second one-way valve 21 includes a liquid outlet 211 located at the lower end of the pump pipe 2. The liquid outlet 211 has a liquid inlet 212 communicating with the inner cavity of the pump pipe 2. The liquid outlet 211 can cooperate with the piston 3 to realize the one-way valve function. The function of the second one-way valve 21 is to allow liquid only to enter the pump pipe 2 from the pump chamber 11 and eventually discharge it.

[0041] Piston 3 is fitted onto the lower part of pump pipe 2, dividing pump chamber 11 into upper and lower chambers. Piston 3 can move up and down within a certain range relative to pump pipe 2. When pump pipe 2 moves upward, piston 3 first moves downward a short distance relative to pump pipe 2 and closes inlet port 212, then moves upward with pump pipe 2, drawing liquid into pump chamber 11 (negative pressure opens first check valve 12). When pump pipe 2 is pressed downward, piston 3 first moves upward a short distance relative to pump pipe 2 and opens inlet port 212, forcing liquid in pump chamber 11 into pump pipe 2 (the liquid automatically closes first check valve 12 and opens second check valve 21).

[0042] The upper end of the pump pipe 2 is fixedly or integrally connected to a guide cover 22, which extends downward to cooperate with the rotating seat 4 and guide the movement of the pump pipe 2.

[0043] An elastic reset element 5 is disposed between the rotating seat 4 and the guide cover 22 to reset the pump tube 2 after pressing. In this embodiment, the elastic reset element 5 is a plastic spring, and the pressing pump is an all-plastic pressing pump (e.g., material composition 95% PP + 5% PE), which can reduce production costs and weight. The elastic reset element 5 is preferably hollow and ellipsoidal, with several side openings 51 on its upper and lower end sidewalls. The design of the side openings 51 can increase the elasticity of the elastic reset element 5 and improve the reset effect.

[0044] More importantly, to achieve the rotational locking function, the rotating seat 4 is threadedly connected to the pump housing 1 and can be adjusted up and down within it. The inner wall of the pump housing 1 has an internal thread 13, and the outer wall of the rotating seat 4 has a protrusion 41. The protrusion 41 engages with the internal thread 13 on the inner wall of the pump housing 1, thereby achieving spiral up and down movement along the internal thread 13. When the pump pipe 2 is rotated, the pump pipe 2 drives the rotating seat 4 to rotate within the pump housing 1. Due to the engagement of the protrusion 41 and the internal thread 13, the rotating seat 4 rises or falls accordingly, thereby adjusting the distance between the rotating seat 4 and the guide cover 22, and changing the degree of compression of the elastic reset member 5.

[0045] In addition, a locking groove 14 is provided on the inner wall of the pump casing 1. The locking groove 14 has an upward opening and is located at the upper end of the internal thread 13, and is circumferentially offset from the screw inlet at the upper end of the internal thread 13. The locking groove 14 is used to cooperate with the protrusion 41 on the rotating seat 4 to realize the locking function of the pump. Specifically, when the pump tube 2 is in the pop-up state, rotating the pump tube 2 can cause the protrusion 41 on the rotating seat 4 to engage with the locking groove 14, thereby locking the rotating seat 4. At this time, during the pressing of the pump tube 2, the rotating seat 4 can be prevented from moving randomly.

[0046] A circumferential limiting structure is disposed between the guide cover 22 and the rotating seat 4 to restrict the relative circumferential rotation between them. In this embodiment, the guide cover 22 is inserted into the rotating seat 4. The circumferential limiting structure includes an axial limiting groove 221 on the outer wall of the guide cover 22 and an axial limiting protrusion 42 on the inner wall of the rotating seat 4. The limiting protrusion 42 is inserted into the corresponding limiting groove 221 so that the guide cover 22 and the rotating seat 4 rotate synchronously. Through the circumferential limiting structure, it can be ensured that the rotating seat 4 can rotate synchronously when the pump pipe 2 is rotated, thereby realizing the rotation locking function.

[0047] To better accommodate and fix the elastic reset member 5, the outer wall of the upper end of the pump pipe 2 gradually slopes outward from bottom to top, and a first receiving groove 52 for accommodating the upper end of the elastic reset member 5 is formed between the outer wall of the upper end of the pump pipe 2 and the guide cover 22. The first receiving groove 52 can prevent the elastic reset member 5 from shifting during compression and extension, ensuring its normal operation.

[0048] More specifically, the inner periphery of the lower end of the rotating seat 4 is provided with an upwardly extending inner cover 43. The inner cover 43 is inclined from bottom to top and towards the middle. The inner cover 43 and the inner sidewall of the lower end of the guide cover 22 form a second receiving groove 431 for accommodating the lower end of the elastic reset member 5. This can guide and protect the elastic reset member 5 and prevent the elastic reset member 5 from shifting or deforming during compression and extension.

[0049] To prevent the rotating seat 4 from detaching upwards, a fixing cover 6 is also provided at the upper end of the pump casing 1.

[0050] For ease of use, a bottle cap 7 is provided on the outer wall of the upper end of the pump casing 1, and a curved nozzle 8 is provided at the upper end of the pump pipe 2 to communicate with its inner cavity.

[0051] In addition, an air inlet 15 is provided on the side wall of the pump casing 1 to balance the air pressure inside the pump chamber 11 and ensure the normal operation of the pump. External air enters from the top of the bottle cap 7, passes through the gap between the bottle cap 7 and the guide cover 22, and the gap between the rotating seat 4 and the pump casing 1, and finally reaches the air inlet 15 to achieve the balance of air pressure inside and outside the pump chamber 11.

[0052] The working principle of this utility model:

[0053] Press-to-dispense: When press-to-dispense is required, press down on pump tube 2. Piston 3 will first move upward relative to pump tube 2 and open inlet 212, then move downward together with pump tube 2. Liquid in pump chamber 11 is forced into pump tube 2 (the liquid automatically closes the first one-way valve 12 and opens the second one-way valve 21), and is discharged from nozzle 8. After releasing, under the action of elastic reset member 5, pump tube 2 returns to its original position. Piston 3 first moves downward relative to pump tube 2 a short distance and closes inlet 212, then moves upward together with pump tube 2, and draws liquid into pump chamber 11 (negative pressure opens the first one-way valve 12).

[0054] Rotary locking: When the pump pipe 2 is under pressure, rotating the pump pipe 2 drives the rotating seat 4 to rotate, causing the protrusion 41 on the rotating seat 4 to screw into the internal thread 13 and gradually move downward along the internal thread 13. At this time, the space between the rotating seat 4 and the guide cover 22 increases, and the elastic reset member 5 remains in an extended state, avoiding the problem of the elastic reset member 5 failing due to prolonged pressure.

[0055] Unlocking: Rotate the pump tube 2 in the reverse direction to move the rotating seat 4 upward along the internal thread 13. When the protrusion 41 on the rotating seat 4 is screwed into the locking groove 14 on the inner wall of the pump housing 1, you can release the handle. Under the elastic action of the elastic reset member 5, the pump tube 2 automatically returns to the pop-up state.

[0056] This utility model features a compact structure and simple operation. The rotary locking mechanism effectively prevents accidental pressing and protects the elastic reset mechanism, extending its service life. This structural design achieves the locking function of the bottom-locking pump and effectively prevents the elastic reset mechanism from failing due to prolonged pressure. It also boasts advantages such as simple structure and convenient operation. Furthermore, the all-plastic pump design reduces production costs and weight, making it more competitive in the market.

Claims

1. A push-on pump of the lower lock type, characterized in that, include: Pump casing (1), a pump chamber (11) is provided inside the pump casing (1), and a first check valve (12) is provided at the lower end of the pump chamber (11); The pump pipe (2) is slidably disposed in the pump chamber (11) and has a hollow structure. A second one-way valve (21) is provided at its lower end. The piston (3) is fitted onto the lower part of the pump pipe (2) and divides the pump chamber (11) into upper and lower chambers; The rotating seat (4) is threadedly connected inside the pump housing (1) and can be raised and lowered therein for adjustment; The guide cover (22) is fixedly or integrally connected to the outer periphery of the upper end of the pump pipe (2) and extends downward; An elastic reset member (5) is disposed between the rotating seat (4) and the guide cover (22); A circumferential limiting structure is provided between the guide cover (22) and the rotating seat (4) to limit the relative circumferential rotation between the two; When the pump pipe (2) is under pressure, rotating the pump pipe (2) causes the rotating seat (4) to move downward, increasing the distance between the rotating seat (4) and the guide cover (22), thereby keeping the elastic reset member (5) in an extended state.

2. A pump according to claim 1, wherein: The pump housing (1) has an internal thread (13) on its inner side wall and a protrusion (41) on its outer side wall. The protrusion (41) engages with the internal thread (13) to achieve spiral lifting and lowering along the internal thread (13).

3. A pump according to claim 2, wherein: The inner wall of the pump housing (1) is also provided with a locking groove (14). The locking groove (14) is open upward and located at the upper end of the internal thread (13), and is circumferentially offset from the screw entrance at the upper end of the internal thread (13). The protrusion (41) can be inserted into the corresponding locking groove (14) to achieve locking.

4. A pump according to claim 1, wherein: The guide cover (22) is inserted into the rotating seat (4). The circumferential limiting structure includes an axial limiting groove (221) on the outer side wall of the guide cover (22) and an axial limiting protrusion (42) on the inner side wall of the rotating seat (4). The limiting protrusion (42) is inserted into the corresponding limiting groove (221) so that the guide cover (22) and the rotating seat (4) rotate synchronously.

5. A pump according to claim 1, wherein: The elastic reset component (5) is a plastic spring, and the press pump is made entirely of plastic.

6. A pump according to claim 5, wherein: The elastic reset member (5) is a hollow ellipsoid, and several side openings (51) are provided on the side walls at its upper and lower ends.

7. A pump according to claim 1 or 6, wherein: The outer wall of the upper end of the pump pipe (2) gradually slopes outward from bottom to top, and the outer wall of the upper end of the pump pipe (2) and the guide cover (22) form a first receiving groove (52) for accommodating the upper end of the elastic reset member (5).

8. A pump according to claim 1 or 6, wherein: The inner periphery of the lower end of the rotating seat (4) is provided with an upwardly extending inner cover (43). The inner cover (43) is inclined from bottom to top and towards the middle. The inner cover (43) and the inner sidewall of the lower end of the guide cover (22) form a second receiving groove (431) for accommodating the lower end of the elastic reset member (5).

9. A pump according to claim 1 wherein: The second one-way valve (21) includes an outlet head (211) located at the lower end of the pump pipe (2). The outlet head (211) is provided with an inlet (212) that communicates with the inner cavity of the pump pipe (2). The piston (3) is movably sleeved on the pump pipe (2) and can move up and down relative to the pump pipe (2). It can seal the inlet (212) when the pump pipe (2) rises and open the inlet (212) when the pump pipe (2) falls.

10. A pump according to claim 1 wherein: The upper end of the pump casing (1) is also provided with a fixing cover (6) to restrict the rotating seat (4) from detaching upwards.

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