A fully plastic lotion pump

Abstract

The present invention discloses an all-plastic lotion pump, comprising a pump chamber, wherein a liquid inlet is provided at the lower end of the pump chamber, and the pump chamber is characterized in that: a one-way valve capable of closing the liquid inlet is provided in the lower portion of the pump chamber, a lower pump rod is provided in the pump chamber, a feed port capable of connecting the internal flow channel of the lower pump rod with the inner cavity of the pump chamber is provided on the lower outer wall of the lower pump rod, an upper pump rod is plugged into the lower pump rod, a piston is sleeved on the outer wall of the lower pump rod, an inner cover capable of preventing the piston from escaping is provided in the upper end of the pump chamber, a plastic ring capable of resetting the upper pump rod is sleeved on the upper pump rod at the upper end of the inner cover, a vertical groove is provided on one side of the plastic ring in the up-down direction, a tapered portion capable of squeezing open the plastic ring is provided on the upper outer wall of the upper pump rod, and a nozzle is connected to the upper pump rod. The present invention has a simple structure, and all parts are made of plastic, which is convenient for recycling. The snap-in design between the threaded sleeve and the middle sleeve effectively prevents the middle sleeve from loosening.

Description

Technical Field

[0001] The present invention relates to the technical field of lotion pumps, and in particular to an all-plastic lotion pump. Background Art

[0002] Lotion pumps, due to their elegant design and ease of use, have been widely used in industries such as cosmetics and pharmaceuticals. However, existing lotion pumps have numerous parts, a complex structure, and are difficult and costly to manufacture. Furthermore, the return spring of the suction assembly of traditional lotion pumps comes into direct contact with the lotion within the pump chamber. Rusting of the return spring can contaminate the liquid, making it unsanitary.

[0003] In order to prevent the metal spring in the pump body from chemically reacting with the liquid perfume, thereby affecting the effect of the perfume and the spring, some lotion pumps adopt an external spring structure. However, for foreign markets, especially the European and American markets, it is difficult to meet the environmental protection control standards in these places; and a lotion pump contains plastic, metal and glass parts at the same time, which need to be disassembled and sorted for recycling during recycling, which is not conducive to product recycling.

[0004] Therefore, there is a need to further improve the existing lotion pump. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an all-plastic lotion pump with a simple structure, all parts of which are made of plastic material and are easy to recycle.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following scheme: an all-plastic lotion pump, comprising a pump chamber, a liquid inlet is provided at the lower end of the pump chamber, and is characterized in that: a one-way valve capable of closing the liquid inlet is provided in the lower part of the pump chamber, a lower pump rod is provided in the pump chamber, and a feed inlet capable of connecting the internal flow channel of the lower pump rod with the inner cavity of the pump chamber is provided on the lower outer wall of the lower pump rod, an upper pump rod is inserted into the lower pump rod, a piston is sleeved on the outer wall of the lower pump rod, an inner cover capable of preventing the piston from detaching is provided in the upper end of the pump chamber, a plastic ring capable of resetting the upper pump rod is sleeved on the upper pump rod at the upper end of the inner cover, a vertical groove is provided on one side of the plastic ring in the up-down direction, a tapered portion capable of squeezing open the plastic ring is provided on the upper outer wall of the upper pump rod, and a nozzle is connected to the upper pump rod.

[0007] As another improvement of the all-plastic lotion pump of the present invention, a V-shaped extrusion block is provided at a position corresponding to the vertical groove of the tapered portion, and the V-shaped extrusion block is movably arranged in the vertical groove.

[0008] As another improvement of the all-plastic emulsion pump of the present invention, a screw sleeve is provided at the upper end of the pump chamber, a middle sleeve is provided outside the screw sleeve, a positioning convex ring is provided inside the middle sleeve, the lower end of the screw sleeve is pressed against the positioning convex ring, and the upper end of the screw sleeve is pressed against the inner wall of the upper end of the middle sleeve.

[0009] As another improvement of the all-plastic lotion pump of the present invention, a guide convex ring is provided in the upper end of the screw sleeve, a guide ring groove is provided at the position of the nozzle corresponding to the guide convex ring, and the guide convex ring is arranged in the guide ring groove.

[0010] As another improvement of the all-plastic emulsion pump of the present invention, the pump chamber includes a pump body, a limiting step is provided on the lower inner wall of the pump body, a liquid inlet pipe is provided in the middle of the lower end of the pump body, the liquid inlet is arranged on the inner wall of the pump body above the liquid inlet pipe, a valve port is provided in the pump body above the liquid inlet, and an air exchange hole is provided on the outer wall in the middle of the pump chamber.

[0011] As another improvement of the all-plastic lotion pump of the present invention, the one-way valve includes a sealing portion that can close the valve port. The outer periphery of the sealing portion is connected to the limit ring through a connecting portion. A liquid guide port is provided on the connecting portion. The outer wall of the limit ring and the inner wall of the lower end of the pump body are dynamically sealed.

[0012] As another improvement of the all-plastic lotion pump of the present invention, a positioning ring is provided on the outer wall of the upper end of the pump body, and a clamping step is provided in the threaded sleeve, and the positioning ring is clamped in the clamping step.

[0013] As another improvement of the all-plastic lotion pump of the present invention, the inner cover includes a cover body, a through hole is provided at the center of the cover body, the upper pump rod is movably arranged in the through hole, a plug-in ring is provided on the lower end surface of the cover body, a limiting slot is provided in the upper end of the pump body, and a limiting block is provided at the corresponding position of the plug-in ring and the limiting slot, the plug-in ring is inserted into the pump body and the limiting block is clamped in the limiting slot.

[0014] As another improvement of the all-plastic lotion pump of the present invention, a positioning inner convex ring platform is provided in the upper pump rod, and a positioning ring groove is provided on the outer wall of the upper end of the lower pump rod, and the positioning inner convex ring platform is clamped in the positioning ring groove.

[0015] As another improvement of the all-plastic lotion pump of the present invention, a positioning convex ring is provided on the upper outer wall of the pump body, and a sealing gasket is sleeved on the outer wall of the pump body. The sealing gasket is arranged between the positioning convex ring and the clamping step.

[0016] As another improvement of the all-plastic lotion pump of the present invention, a plug-in groove is provided in the upper end of the upper pump rod, a connecting column is provided in the nozzle, and a plug-in portion is provided at the lower end of the connecting column, and the plug-in portion is plugged into the plug-in groove.

[0017] In summary, the present invention offers the following advantages over the prior art: It has a simple structure, and all parts are made of plastic, making it easy to recycle. The present invention utilizes the tapered portion of the upper pump rod and the V-shaped extrusion block to squeeze the plastic ring open, which then shrinks using the plastic ring's inherent strength and contractility, creating a spring effect. Furthermore, the V-shaped extrusion block interacts with the vertical grooves in the plastic ring to provide effective guidance. The snap-fit ​​design between the threaded sleeve and the middle sleeve effectively prevents the middle sleeve from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional schematic diagram of the present invention.

[0019] Figure 2 Schematic diagram of the nozzle of the present invention when it is in the highest position.

[0020] Figure 3 Schematic diagram of the nozzle pressing process of the present invention.

[0021] Figure 4 This is a schematic diagram of the feed port of the present invention when it is opened.

[0022] Figure 5 for Figure 4 Enlarged schematic diagram of point A in the middle.

[0023] Figure 6 for Figure 4 Enlarged schematic diagram of point B in the middle.

[0024] In the figure: 1. Pump chamber; 1001. Pump body; 1002. Limiting step; 1003. Liquid inlet pipe; 1004. Valve port; 1005. Ventilation hole; 1006. Positioning ring platform; 1007. Limiting slot; 2. Liquid inlet; 3. One-way valve; 31. Sealing part; 32. Connecting part; 33. Limiting ring; 34. Liquid guide port; 4. Lower pump rod; 41. Positioning ring groove; 42. Connecting ring platform; 43. Annular groove; 5. Feed inlet; 6. Upper pump rod; 61. Conical part; 62. Positioning inner convex part Ring platform; 63, plug-in groove; 64, end; 7, piston; 71, center seat; 72, annular connecting platform; 73, elastic piston part; 8, inner cover; 81, cover body; 82, through hole; 83, plug-in ring; 84, limit block; 9, plastic ring; 91, vertical groove; 10, nozzle; 101, guide ring groove; 102, connecting column; 11, V-shaped extrusion block; 12, screw sleeve; 121, guide convex ring; 122, clamping step; 13, middle sleeve; 14, positioning convex ring; 15, sealing gasket. DETAILED DESCRIPTION

[0025] The above and other technical features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.

[0026] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0027] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0028] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0029] like Figure 1-6 As shown, an all-plastic lotion pump includes a pump chamber 1, a liquid inlet 2 is provided at the lower end of the pump chamber 1, a one-way valve 3 capable of closing the liquid inlet 2 is provided in the lower part of the pump chamber 1, a lower pump rod 4 is provided in the pump chamber 1, a feed port 5 capable of connecting the internal flow channel of the lower pump rod 4 with the inner cavity of the pump chamber 1 is provided on the lower outer wall of the lower pump rod 4, an upper pump rod 6 is inserted into the lower pump rod 4, a piston 7 is sleeved on the outer wall of the lower pump rod 4, an inner cover 8 capable of preventing the piston 7 from escaping is provided in the upper end of the pump chamber 1, a plastic ring 9 capable of resetting the upper pump rod 6 is sleeved on the upper end of the inner cover 8, a vertical groove 91 is provided on one side of the plastic ring 9 in the up-down direction, a tapered portion 61 capable of squeezing open the plastic ring 9 is provided on the upper outer wall of the upper pump rod 6, and a nozzle 10 is connected to the upper pump rod 6. A V-shaped extrusion block 11 is provided at a position corresponding to the tapered portion 61 and the vertical groove 91 , and the V-shaped extrusion block 11 is movably disposed in the vertical groove 91 .

[0030] The present invention has a simple structure, and all parts are made of plastic, making it easy to recycle. The present invention uses the tapered portion on the upper pump rod and the V-shaped extrusion block to squeeze the plastic ring open, and then uses the plastic ring's own strength and contractility to shrink, achieving a spring effect. In addition, the V-shaped extrusion block cooperates with the vertical groove on the plastic ring to provide a good guide.

[0031] The present invention provides a screw sleeve 12 at the upper end of the pump chamber 1, a middle sleeve 13 is provided outside the screw sleeve 12, and a positioning protruding ring 14 is provided inside the middle sleeve 13. The lower end of the screw sleeve 12 presses against the positioning protruding ring 14, and the upper end of the screw sleeve 12 presses against the inner wall of the upper end of the middle sleeve 13. The buckle-type design between the screw sleeve and the middle sleeve of the present invention effectively prevents the middle sleeve from loosening.

[0032] In the present invention, a guide protrusion 121 is provided at the upper end of the screw thread sleeve 12, and a guide ring groove 101 is provided at a position on the nozzle 10 corresponding to the guide protrusion 121. The guide protrusion 121 is disposed within the guide ring groove 101. The cooperation between the guide protrusion 121 and the guide ring groove 101 makes the nozzle 10 move more smoothly during the up and down movement, and prevents left and right shaking.

[0033] The pump chamber 1 of the present invention includes a pump body 1001, a limiting step 1002 is provided on the lower inner wall of the pump body 1001, a liquid inlet pipe 1003 is provided in the middle of the lower end of the pump body 1001, the liquid inlet 2 is provided on the inner wall of the pump body 1001 above the liquid inlet pipe 1003, a valve port 1004 is provided in the pump body 1001 above the liquid inlet 2, and a ventilation hole 1005 is provided on the outer wall of the middle part of the pump chamber 1. In the present invention, the ventilation hole 1005 can connect the air in the pump body 1001 above the piston to the outside during the movement of the piston, ensuring that the piston can move smoothly.

[0034] The one-way valve 3 of the present invention includes a sealing portion 31 that seals the valve port 1004. The outer periphery of the sealing portion 31 is connected to a retaining ring 33 via a connecting portion 32. A liquid guide port 34 is provided on the connecting portion 32. The outer wall of the retaining ring 33 forms a dynamic seal with the inner wall of the lower end of the pump body 1001. When liquid is introduced into the present invention, the emulsion enters through the valve port 1004 and then enters the pump body 1001 through the liquid guide port 34 on the connecting portion 32. The one-way valve 3 of the present invention does not require a directional control, making it easy to use.

[0035] In the present invention, a positioning ring 1006 is provided on the outer wall of the upper end of the pump body 1001, and a clamping step 122 is provided in the screw sleeve 12. The positioning ring 1006 is clamped in the clamping step 122. In the present invention, the clamping step 122 and the positioning ring 1006 can quickly position the pump body 1001 and the screw sleeve 12, making installation convenient and quick.

[0036] The inner cover 8 in the present invention includes a cover body 81, a through hole 82 is provided at the center of the cover body 81, the upper pump rod 6 is movably arranged in the through hole 82, a plug-in ring 83 is provided on the lower end surface of the cover body 81, a limiting slot 1007 is provided in the upper end of the pump body 1001, and a limiting block 84 is provided at the corresponding position of the plug-in ring 83 and the limiting slot 1007. The plug-in ring 83 is inserted in the pump body 1001 and the limiting block 84 is clamped in the limiting slot 1007. When assembling the present invention, first assemble the piston on the lower pump rod from top to bottom, then put the inner cover 8 into the lower pump rod, and then install the upper pump rod on the lower pump rod. After the assembly is completed, put the piston and the lower pump rod into the pump chamber, and then press the inner cover 8 on the upper end of the pump chamber. At this time, the plug-in ring 83 is inserted into the pump body 1001 and the limit block 84 is clamped in the limit groove 1007, thereby locking the piston, lower pump rod and upper pump rod and preventing them from leaving the pump chamber.

[0037] In the present invention, a positioning inner protrusion 62 is provided within the upper pump rod 6, and a positioning annular groove 41 is provided on the outer wall of the upper end of the lower pump rod 4. The positioning inner protrusion 62 engages within the positioning annular groove 41. The cooperation between the positioning inner protrusion 62 and the positioning annular groove 41 allows for quick installation of the upper and lower pump rods. In the present invention, a terminal 64 is provided at the upper end of the upper pump rod 6 to prevent the plastic ring 9 from detaching.

[0038] In the present invention, a positioning protruding ring 14 is provided on the outer wall of the upper portion of the pump body 1001, and a sealing gasket 15 is sleeved on the outer wall of the pump body 1001. The sealing gasket 15 is disposed between the positioning protruding ring 14 and the engaging step 122. In the present invention, after the sealing gasket 15 is installed in the pump body 1001, it will not deviate, thereby effectively ensuring the sealing performance between the pump body and the bottle body.

[0039] In the present invention, a plug-in slot 63 is provided in the upper end of the upper pump rod 6 , a connecting column 102 is provided in the spray head 10 , and a plug-in portion 103 is provided at the lower end of the connecting column 102 , which is plugged into the plug-in slot 63 .

[0040] In the present invention, a connecting ring 42 is provided at the lower end of the lower pump rod 4, and an annular groove 43 is provided on the upper end surface of the connecting ring 42. The lower pump rod 4 gradually tapers from bottom to top, forming a certain taper. The piston 7 of the present invention includes a center seat 71 with a tapered hole provided therein. When the lower end of the center seat 71 is inserted into the annular groove 43, the feed port 5 is sealed. The center seat 71 is sleeved onto the outer wall of the lower pump rod 4. An elastic piston portion 73 is provided on the outer wall of the center seat 71 via an annular connecting ring 72. The elastic piston portion 73 dynamically seals with the inner wall of the pump body 1001.

[0041] The plastic ring 9 in the present invention may be cylindrical or frustum-shaped.

[0042] The present invention operates as follows: In the initial state, one-way valve 3 closes liquid inlet 2, and spray head 10 is in its highest position. When a downward force is applied to spray head 10, it drives upper pump rod 6, lower pump rod 4, and piston 7 downward in tandem. Simultaneously, the tapered upper pump rod 6 squeezes plastic ring 9, increasing its stored energy. Simultaneously, V-shaped extrusion block 11 of tapered portion 61 moves within vertical groove 91, further ensuring smooth extrusion of plastic ring 9.

[0043] When the lower end of the piston 7 is pressed against the limit step 1002, the piston 7 stops moving downward and separates from the lower pump rod 4. The feed port 5 opens, and the air in the pump chamber 1 below the piston 7 is discharged along the feed port 5, the lower pump rod 4, the upper pump rod 6 and the nozzle 10. Under the action of the ventilation hole 1005, the air in the pump chamber 1 above the piston 7 is connected to the outside of the pump chamber 1, thereby ensuring that the piston 7 can move smoothly. When the nozzle 10 loses external force, the upper pump rod 6, the lower pump rod 4, and the piston 7 are driven to move upward rapidly under the reset effect of the self-contraction of the plastic ring 9. At this time, negative pressure is formed in the pump chamber below the piston 7, the one-way valve 3 is opened, and the liquid enters the pump chamber from the liquid inlet 2. When the nozzle 10 is pressed again, the one-way valve 3 is closed and the liquid in the pump chamber is compressed, thereby being sprayed out along the lower pump rod 4, the upper pump rod 6 and the nozzle 10.

[0044] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An all-plastic lotion pump, comprising a pump chamber (1), wherein the lower end of the pump chamber (1) is provided with a liquid inlet (2), characterized in that: A one-way valve (3) capable of closing the liquid inlet (2) is provided in the lower portion of the pump chamber (1), a lower pump rod (4) is provided in the pump chamber (1), a feed port (5) capable of connecting the internal flow channel of the lower pump rod (4) with the inner cavity of the pump chamber (1) is provided on the lower outer wall of the lower pump rod (4), an upper pump rod (6) is plugged into the lower pump rod (4), a piston (7) is sleeved on the outer wall of the lower pump rod (4), an inner cover (8) capable of preventing the piston (7) from detaching is provided in the upper end of the pump chamber (1), and a piston (7) is sleeved on the outer wall of the lower pump rod (4). 8) A plastic ring (9) is sleeved on the upper end of the upper pump rod (6) to reset the upper pump rod (6), a vertical groove (91) is provided on one side of the plastic ring (9) in the up-down direction, a tapered portion (61) is provided on the upper outer wall of the upper pump rod (6) to squeeze open the plastic ring (9), a nozzle (10) is connected to the upper pump rod (6), a V-shaped squeezing block (11) is provided at a position corresponding to the tapered portion (61) and the vertical groove (91), and the V-shaped squeezing block (11) is movably arranged in the vertical groove (91).

2. The all-plastic lotion pump according to claim 1, characterized in that: A threaded sleeve (12) is provided at the upper end of the pump chamber (1), a middle sleeve (13) is provided on the outer surface of the threaded sleeve (12), a positioning convex ring (14) is provided in the middle sleeve (13), the lower end of the threaded sleeve (12) is pressed against the positioning convex ring (14), and the upper end of the threaded sleeve (12) is pressed against the inner wall of the upper end of the middle sleeve (13).

3. The all-plastic lotion pump according to claim 2, characterized in that: A guide convex ring (121) is provided in the upper end of the screw thread sleeve (12), a guide ring groove (101) is provided at a position corresponding to the guide convex ring (121) on the nozzle (10), and the guide convex ring (121) is arranged in the guide ring groove (101).

4. The all-plastic lotion pump according to claim 2, characterized in that: The pump chamber (1) comprises a pump body (1001), a limiting step (1002) is provided on the inner wall of the lower portion of the pump body (1001), a liquid inlet pipe (1003) is provided in the middle portion of the lower end of the pump body (1001), the liquid inlet (2) is provided on the inner wall of the pump body (1001) above the liquid inlet pipe (1003), a valve port (1004) is provided in the pump body (1001) above the liquid inlet (2), and an air exchange hole (1005) is provided on the outer wall of the middle portion of the pump chamber (1).

5. The all-plastic lotion pump according to claim 4, characterized in that: The one-way valve (3) includes a sealing portion (31) capable of closing the valve port (1004). The outer periphery of the sealing portion (31) is connected to a limiting ring (33) via a connecting portion (32). A liquid guide port (34) is provided on the connecting portion (32). A dynamic seal is formed between the outer wall of the limiting ring (33) and the inner wall of the lower end of the pump body (1001).

6. The all-plastic lotion pump according to claim 4, characterized in that: A positioning ring platform (1006) is provided on the outer wall of the upper end of the pump body (1001), and a clamping step (122) is provided in the screw sleeve (12), and the positioning ring platform (1006) is clamped in the clamping step (122).

7. The all-plastic lotion pump according to claim 4, characterized in that: The inner cover (8) includes a cover body (81), a through hole (82) is provided at the center of the cover body (81), the upper pump rod (6) is movably arranged in the through hole (82), a plug-in ring (83) is provided on the lower end surface of the cover body (81), a limiting slot (1007) is provided in the upper end of the pump body (1001), a limiting block (84) is provided at a position corresponding to the plug-in ring (83) and the limiting slot (1007), the plug-in ring (83) is inserted in the pump body (1001) and the limiting block (84) is engaged in the limiting slot (1007).

8. The all-plastic lotion pump according to claim 1, characterized in that: A positioning inner convex ring platform (62) is provided in the upper pump rod (6), and a positioning ring groove (41) is provided on the outer wall of the upper end of the lower pump rod (4). The positioning inner convex ring platform (62) is clamped in the positioning ring groove (41).

9. The all-plastic lotion pump according to claim 5, characterized in that: A positioning convex ring (14) is provided on the outer wall of the upper portion of the pump body (1001), and a sealing gasket (15) is sleeved on the outer wall of the pump body (1001). The sealing gasket (15) is arranged between the positioning convex ring (14) and the clamping step (122).

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