All-plastic recyclable pressing pump

Abstract

The utility model discloses an all-plastic recyclable pressing pump which comprises a pump body, the pump body is provided with a pump chamber, the pump body is connected with a bottle locking cover, a liquid pumping assembly is arranged in the pump chamber, and a locking cover capable of limiting the liquid pumping assembly from being separated from the pump chamber is arranged in the pump chamber. A locking mechanism capable of limiting downward movement of the bent nozzle when the bent nozzle stays at the locking position is arranged between the pump rod and the locking cover, the locking cover is provided with a big-end-down conical lower protrusion, and the bent nozzle is provided with a big-end-up conical upper protrusion. An annular elastic piece capable of enabling the liquid pumping assembly to reset after the liquid pumping assembly is pressed down is arranged on the pump rod between the locking cover and the bent nozzle, at least two protruding parts protruding outwards are arranged on the annular elastic piece, and a sunken part sunken inwards is arranged between every two adjacent protruding parts. The concave part is used for replacing the opening to reduce the elastic coefficient of the annular elastic piece, so that the annular elastic piece is easier to deform and has a better rebound effect; an opening does not need to be cut to damage the structural strength, the service life is prolonged, meanwhile, the generation of transverse stress is reduced, and the movement is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of press pumps, in particular to a fully plastic recyclable press pump. Background Art

[0002] A press pump is a liquid dispenser that uses the principle of atmospheric balance to pump out the liquid in the bottle and replenish the outside atmosphere into the bottle. A press pump generally includes a piston. When the user presses the pump for the first time, the piston moves in the pump chamber, compresses the spring and opens the outlet channel. At the same time, the air in the pump chamber is discharged through the outlet channel. Subsequently, when the user releases the pump head, the piston moves upward under the action of the spring force and closes the outlet channel. At this time, the air in the pump chamber is sealed, forming a negative pressure. In order to balance the internal and external pressures, the lotion in the bottle is sucked into the pump chamber through the inlet tube until the internal and external pressures reach a balance. Finally, when the user presses the pump head again, the piston moves down, opens the outlet channel, and the lotion is sprayed out from the nozzle under pressure.

[0003] In order to achieve the standard of efficient recycling, all the components of a press pump are sometimes made of plastic. At present, in order to reduce the elastic coefficient, a cut is often made on the plastic spring of the return spring used for the press pump. For example, the patent application number is 202220132383.8, and the patent name is a recyclable all-plastic self-locking pump. The patent document discloses a press pump using a plastic ring as a return part. A vertical opening is opened on the side of the plastic ring. This will result in two disadvantages. First, during the deformation process of the plastic ring, while generating thrust in the vertical direction, it will inevitably generate lateral thrust, thereby increasing the friction between the components when moving, affecting the liquid discharge effect; second, the vertical opening will reduce the structural strength of the plastic ring, thereby affecting its service life.

[0004] The utility model is made based on the above situation. Utility Model Content

[0005] The utility model overcomes the shortcomings of the prior art and provides a fully plastic recyclable press pump which has stable movement and high structural strength.

[0006] The utility model is realized by the following technical solutions:

[0007] A fully plastic recyclable press pump comprises a pump body, the pump body is provided with a pump chamber for inletting liquid at the bottom, a bottle locking cap is connected to the pump body, a pumping assembly is provided in the pump chamber which can move up and down therein so as to draw liquid out of the bottle upward, the pumping assembly comprises a pump rod, a curved nozzle which can drive the pumping assembly to work is connected to the upper end of the pump rod, a liquid outlet channel is provided in the curved nozzle, a locking cap which can limit the pumping assembly from leaving the pump chamber is provided in the pump chamber, a locking mechanism which can limit the downward movement of the curved nozzle when the curved nozzle stays in the locking position is provided between the pump rod and the locking cap, and a ventilation device is provided on the wall of the pump chamber. The lower end of the pump chamber is provided with a one-way valve that can allow the liquid in the bottle to pass through and enter the pump chamber when the pumping component moves. The lower part of the pumping component is provided with a control valve that can control the liquid in the pump chamber to be sprayed out from the liquid outlet channel. The locking cover is provided with a conical lower protrusion that is small at the top and large at the bottom, and the bent nozzle is provided with a conical upper protrusion that is large at the top and small at the bottom. The pump rod between the locking cover and the bent nozzle is provided with an annular elastic member that can reset the pumping component after the pumping component is pressed down, and the annular elastic member is provided with at least two outwardly protruding protrusions, and an inwardly recessed recess is provided between two adjacent protrusions.

[0008] In the all-plastic recyclable press pump as described above, the inner wall of the annular elastic member is provided with reinforcing ribs protruding inwardly.

[0009] In the all-plastic recyclable press pump as described above, the protruding portion and the recessed portion are both arc-shaped.

[0010] As described above, an all-plastic recyclable press pump is provided in the pump rod, and the upper part of the pump rod is communicated with the liquid outlet channel. The control valve includes a liquid inlet arranged at the lower part of the pump rod and communicating the pump rod with the pump chamber. The outer side of the pump rod is provided with a suction plug which can slide relative to it and seal the liquid inlet. The outer wall of the pump rod is provided with a driving structure which can drive the suction plug to slide. The lower part of the pump chamber is provided with a conical part which can limit the suction plug from sliding downward and can allow the lower part of the pump rod to be inserted. The bottom of the pump rod is provided with a conical sealing plug which can be inserted into the conical part.

[0011] As described above, the all-plastic recyclable press pump, the bent nozzle includes a lower connecting tube and a transverse tube, the conical upper protrusion is arranged on the inner top of the lower connecting tube, and a plug-in groove connected to the pump rod is arranged in the conical upper protrusion, and the top of the plug-in groove is communicated with the transverse tube.

[0012] In the all-plastic recyclable press pump as described above, the locking mechanism includes an annular step arranged on the inner wall of the pump chamber and used to fix the locking cover, the outer wall of the pump rod is provided with a vertical convex strip, the locking cover is provided with a locking cover hole for the pump rod to pass through, the inner wall of the locking cover hole is provided with an arc ring that can cooperate with the convex strip, and limit blocks are provided on both sides of the arc ring.

[0013] In the all-plastic recyclable press pump as described above, the driving structure includes an upper limit rib provided on the pump rod, the outer wall above the liquid inlet, and a lower limit convex ring provided on the pump rod, the outer wall below the liquid inlet.

[0014] In the all-plastic recyclable press pump as described above, the one-way valve includes a pump ball arranged at the lower end of the pump chamber.

[0015] In the all-plastic recyclable press pump as described above, the pump body, bottle locking cap, pump rod, curved nozzle, locking cap, liquid pumping assembly, one-way valve and annular elastic member are all formed by plastic injection molding.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1. The annular elastic member is provided with at least two outwardly protruding protrusions, and an inwardly recessed portion is provided between two adjacent protrusions. The recessed portion is used instead of the opening to reduce the elastic coefficient of the annular elastic member, making it easier to deform and having a better rebound effect; there is no need to cut out an opening to destroy its structural strength, thereby increasing its service life, and at the same time reducing the generation of lateral stress, making it move more smoothly.

[0018] 2. A two-way conical guide is formed by providing a conical lower protrusion on the locking cover and a conical upper protrusion on the bent mouth. The annular elastic member elastically expands and contracts between the two-way conical protrusions, so that the annular elastic member slides up and down more smoothly and the liquid discharge is stable and uniform.

[0019] 3. The pump body, bottle lock cap, pump rod, elbow, locking cap, liquid pumping assembly, one-way valve and annular elastic part are all made of plastic injection molding, so that the push pump can meet the standard of efficient recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is a cross-sectional view of the utility model;

[0023] Figure 3 It is an exploded schematic diagram of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the locking cover in the utility model;

[0025] Figure 5 It is a top view of the annular elastic member of the utility model when three protrusions protruding outward are provided;

[0026] Figure 6 It is a schematic diagram of the structure when the annular elastic member of the utility model is provided with four protrusions protruding outward;

[0027] Figure 7 It is a top view of the annular elastic member of the utility model when four protrusions protruding outward are provided on the annular elastic member. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings:

[0029] like Figures 1 to 7 The fully plastic recyclable press pump shown in the figure comprises a pump body 1, the pump body 1 is provided with a pump chamber 11 for liquid inlet at the bottom, a bottle locking cap 2 is connected to the pump body 1, a liquid pumping assembly is provided in the pump chamber 11 which can move up and down therein so as to pump the liquid in the bottle upward, the liquid pumping assembly comprises a pump rod 31, the upper end of the pump rod 31 is connected with a curved nozzle 4 which can drive the liquid pumping assembly to work, a liquid outlet channel 41 is provided in the curved nozzle 4, a locking cover 5 which can limit the liquid pumping assembly from leaving the pump chamber 11 is provided in the pump chamber 11, a locking mechanism which can limit the downward movement of the curved nozzle 4 when the curved nozzle 4 stays in the locking position is provided between the pump rod 31 and the locking cover 5, a ventilation port 111 is provided on the wall of the pump chamber 11, and the lower end of the pump chamber 11 is provided with a ventilating port 111. The end is provided with a one-way valve 6 which can allow the liquid in the bottle to pass through and enter the pump chamber 11 when the pumping assembly moves. The one-way valve 6 includes a pump ball arranged at the lower end of the pump chamber 11. The lower part of the pumping assembly is provided with a control valve which can control the liquid in the pump chamber 11 to be sprayed out from the liquid outlet channel 41. The locking cover 5 is provided with a conical lower protrusion 51 which is small at the top and large at the bottom. The bent nozzle 4 is provided with a conical upper protrusion 42 which is large at the top and small at the bottom. The pump rod 31 between the locking cover 5 and the bent nozzle 4 is provided with an annular elastic member 7 which can reset the pumping assembly after the pumping assembly is pressed down. The annular elastic member 7 is provided with at least two outwardly protruding portions 71, and an inwardly recessed portion 72 is provided between two adjacent protrusions 71.

[0030] In this case, the recessed portion 72 is used to replace the opening to reduce the elastic coefficient of the annular elastic member 7, making it easier to deform and having a better rebound effect; there is no need to cut out an opening to damage its structural strength, thereby increasing its service life, and at the same time reducing the generation of lateral stress, making it move more smoothly. By providing a conical lower protrusion 51 on the locking cover 5 and a conical upper protrusion 42 on the curved mouth 4, a bidirectional conical guide is formed, and the annular elastic member 7 elastically expands and contracts between the above-mentioned bidirectional conical protrusions, so that the annular elastic member 7 slides up and down more smoothly, and the liquid discharge is stable and uniform.

[0031] In one embodiment, the annular elastic member 7 is provided with three outwardly protruding portions 71, which are evenly distributed on the annular elastic member 7 along the circumferential direction, and the number of recessed portions 72 is three, which are respectively provided between two adjacent protruding portions 71. Such a layout not only optimizes the space utilization, but also enhances the balanced response capability of the component when subjected to force. The presence of the recessed portions 72 may also help reduce stress concentration and improve the stability and durability of the entire system under dynamic load conditions.

[0032] In one embodiment, the annular elastic member 7 is provided with four outwardly protruding portions 71, which are evenly distributed on the annular elastic member 7 along the circumferential direction, and the number of recessed portions 72 is four, which are respectively provided between two adjacent protruding portions 71. Such a layout not only optimizes the space utilization, but also enhances the balanced response capability of the component when subjected to force. The presence of the recessed portions 72 may also help reduce stress concentration and improve the stability and durability of the entire system under dynamic load conditions.

[0033] In one embodiment, a reinforcing rib 73 protruding inward is provided on the inner wall of the annular elastic member 7, so that the annular elastic member 7 has a stronger stress resistance, is not easy to be damaged, and has a longer service life.

[0034] In one embodiment, both the protruding portion 71 and the recessed portion 72 are arc-shaped, thereby reducing stress concentration, improving stress resistance, and being less prone to damage.

[0035] The pump body 1, the bottle lock cap 2, the pump rod 31, the curved nozzle 4, the locking cap 5, the liquid extraction assembly, the one-way valve 6, and the annular elastic member 7 are all made of plastic injection molding. In one embodiment, the entire product of the press pump is made of ≤10% PE+≥90% PP, which can achieve efficient recycling; it is energy-saving and environmentally friendly, and meets the efficient recycling standards.

[0036] The elbow 4 includes a lower connecting tube 43 and a transverse tube 44. The conical upper protrusion 42 is arranged at the inner top of the lower connecting tube 43. The conical upper protrusion 42 is provided with a plug-in groove 45 connected to the pump rod 31. The top of the plug-in groove 45 communicates with the transverse tube 44. The lower connecting tube 43, the transverse tube 44 and the conical upper protrusion 42 are integrally injection molded.

[0037] The pump rod 31 is provided with a liquid extraction channel 311, the upper part of which is connected to the liquid outlet channel 41, the control valve includes a liquid inlet 312 provided at the lower part of the pump rod 31 and connecting the liquid extraction channel 311 and the pump chamber 11, the outer side of the pump rod 31 is sleeved with a suction plug 313 which can slide relative to it and seal the liquid inlet 312, the outer wall of the pump rod 31 is provided with a driving structure which can drive the suction plug 313 to slide, the lower part of the pump chamber 11 is provided with a tapered portion 112 which can limit the suction plug 313 from sliding downward and can be inserted into the lower part of the pump rod 31, and the bottom of the pump rod 31 is provided with a tapered sealing plug 314 which can be inserted into the tapered portion 112. After the emulsion in the bottle pushes the pump ball into the pump chamber 11, it enters the liquid extraction channel 311 from the liquid inlet 312 and then sprays out from the liquid outlet channel 41.

[0038] The locking mechanism includes an annular step 113 arranged on the inner wall of the pump chamber 11 and used to fix the locking cover 5, a vertical ridge 315 is arranged on the outer wall of the pump rod 31, and a locking cover hole 52 is arranged on the locking cover 5 for the pump rod 31 to pass through, and an arc ring 521 that can cooperate with the ridge 315 is arranged on the inner wall of the locking cover hole 52, and limit blocks 522 are arranged on both sides of the arc ring 521.

[0039] The driving structure includes an upper limit rib 316 disposed on the outer wall of the pump rod 31 above the liquid inlet 312 , and a lower limit convex ring 317 disposed on the outer wall of the pump rod 31 below the liquid inlet 312 .

Claims

1. A fully plastic recyclable press pump, characterized in that: The invention comprises a pump body (1), wherein the pump body (1) is provided with a pump chamber (11) for inletting liquid from the bottom, a bottle locking cover (2) is connected to the pump body (1), a pumping assembly is provided in the pump chamber (11) and can move up and down therein so as to pump liquid out of the bottle upwards, the pumping assembly comprises a pump rod (31), the upper end of the pump rod (31) is connected with a curved nozzle (4) which can drive the pumping assembly to work, a liquid outlet channel (41) is provided in the curved nozzle (4), a locking cover (5) which can limit the pumping assembly from leaving the pump chamber (11) is provided in the pump chamber (11), a locking mechanism is provided between the pump rod (31) and the locking cover (5) and can limit the curved nozzle (4) from moving downwards when the curved nozzle (4) stays in the locking position, and a ventilation port (111) is provided on the wall of the pump chamber (11). ), a one-way valve (6) is provided at the lower end of the pump chamber (11) to allow the liquid in the bottle to pass through and enter the pump chamber (11) when the pumping assembly moves, a control valve is provided at the lower part of the pumping assembly to control the liquid in the pump chamber (11) to be ejected from the liquid outlet channel (41), the locking cover (5) is provided with a conical lower protrusion (51) with a small upper part and a large lower part, the curved nozzle (4) is provided with a conical upper protrusion (42) with a large upper part and a small lower part, and an annular elastic member (7) is provided on the pump rod (31) between the locking cover (5) and the curved nozzle (4) to reset the pumping assembly after the pumping assembly is pressed down, and at least two outwardly protruding protrusions (71) are provided on the annular elastic member (7), and an inwardly recessed recess (72) is provided between two adjacent protrusions (71).

2. The all-plastic recyclable press pump according to claim 1, characterized in that: The inner wall of the annular elastic member (7) is provided with a reinforcing rib (73) protruding inwards.

3. The all-plastic recyclable press pump according to claim 1, characterized in that: The protruding portion (71) and the recessed portion (72) are both arc-shaped.

4. The all-plastic recyclable press pump according to claim 1, characterized in that: The pump rod (31) is provided with a liquid extraction channel (311), the upper portion of the liquid extraction channel (311) is communicated with the liquid outlet channel (41), the control valve comprises a liquid inlet (312) arranged at the lower portion of the pump rod (31) and communicating the liquid extraction channel (311) with the pump chamber (11), the outer side of the pump rod (31) is sleeved with a suction plug (313) which can slide relative to the pump rod and seal the liquid inlet (312), the outer wall of the pump rod (31) is provided with a driving structure which can drive the suction plug (313) to slide, the lower portion of the pump chamber (11) is provided with a tapered portion (112) which can limit the suction plug (313) from sliding downward and can be inserted into the lower portion of the pump rod (31), and the bottom of the pump rod (31) is provided with a tapered sealing plug (314) which can be inserted into the tapered portion (112).

5. The all-plastic recyclable press pump according to claim 1, characterized in that: The curved nozzle (4) comprises a lower connecting tube (43) and a transverse tube (44), the conical upper protrusion (42) being arranged at the inner top of the lower connecting tube (43), the conical upper protrusion (42) being provided with a plug-in groove (45) connected to the pump rod (31), and the top of the plug-in groove (45) being communicated with the transverse tube (44).

6. The all-plastic recyclable press pump according to claim 1, characterized in that: The locking mechanism comprises an annular step (113) arranged on the inner wall of the pump chamber (11) and used to fix the locking cover (5); the outer wall of the pump rod (31) is provided with a vertical convex strip (315); the locking cover (5) is provided with a locking cover hole (52) for the pump rod (31) to pass through; the inner wall of the locking cover hole (52) is provided with an arc ring (521) capable of cooperating with the convex strip (315); and limit blocks (522) are provided on both sides of the arc ring (521).

7. The all-plastic recyclable press pump according to claim 4, characterized in that: The driving structure comprises an upper limit convex rib (316) provided on the outer wall of the pump rod (31) above the liquid inlet (312), and a lower limit convex ring (317) provided on the outer wall of the pump rod (31) below the liquid inlet (312).

8. The all-plastic recyclable press pump according to claim 1, characterized in that: The one-way valve (6) comprises a pump ball arranged at the lower end of the pump chamber (11).

9. The all-plastic recyclable press pump according to claim 1, characterized in that: The pump body (1), the bottle locking cover (2), the pump rod (31), the curved nozzle (4), the locking cover (5), the liquid pumping assembly, the one-way valve (6), and the annular elastic member (7) are all formed by plastic injection molding.

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