Plastic spring and plastic pump core

Abstract

The plastic spring and the plastic pump core comprise the plastic spring, the plastic spring comprises a first connecting part, an elastic part and a second connecting part, the first connecting part and the second connecting part are located at the two ends of the elastic part respectively, the first connecting part and the second connecting part are communicated with the interior of the elastic part, and the elastic part comprises a plurality of elastic units. The plastic spring comprises a plurality of elastic units, the elastic units are arranged in a stacked mode and communicated with one another, the middles of the side walls of the elastic units are bent and protrude outwards, and the bending angle of the elastic unit located in the middle of the elastic component is larger than that of the elastic units at the two ends of the elastic component. And a traditional metal spring is replaced, so that the manufacturing of the all-plastic pressing pump and the all-plastic packaging bottle is realized, the overall recycling of the packaging bottle is met, and the production cost is also reduced.

Description

Technical Field

[0001] This utility model relates to the field of cosmetic packaging pump core technology, and more specifically, to a plastic spring and a plastic pump core. Background Technology

[0002] Existing pump cores in cosmetic plastic packaging bottles typically contain metal springs. The elasticity of the metal springs allows for pressing, thus dispensing the cosmetics. However, according to the technical specifications for waste plastic recycling, pump cores containing metal components are not considered recyclable plastics. Therefore, when recycling these plastic pumps, the metal springs must be removed before recycling. Furthermore, the use of metal springs in plastic packaging can lead to rust and contamination of the cosmetics, and also increases the difficulty of recycling. Therefore, a technical solution is needed to address these issues. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art, and to make the pump core all plastic by replacing the metal spring with a plastic spring, thereby providing a plastic spring and a plastic pump core.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model discloses a plastic spring, comprising a first connecting portion, an elastic component, and a second connecting portion. The first connecting portion and the second connecting portion are respectively located at both ends of the elastic component and communicate with the interior of the elastic component. The elastic component includes multiple elastic units, which are stacked and interconnected. The sidewalls of the elastic units are bent outwards at the middle, and the bending angle of the elastic unit located in the middle of the elastic component is greater than the bending angle of the elastic units at both ends of the elastic component.

[0006] Furthermore, the number of elastic units is three. The elastic unit located in the middle of the elastic component is the first elastic ring, and the two elastic units located at both ends of the elastic component are the second elastic rings. The bending angle of the first elastic ring is 'a', and the bending angle of the second elastic ring is 'b', where 'a' is greater than 'b'.

[0007] Furthermore, the outer side of the bend of the elastic unit is provided with an outer rounded corner, and the inner side of the bend of the elastic unit is provided with an inner rounded corner.

[0008] Furthermore, the first connecting portion is annular, and the wall thickness of the first connecting portion is greater than the wall thickness of the elastic unit; the second connecting portion is annular, and the wall thickness of the second connecting portion is greater than the wall thickness of the elastic unit.

[0009] Furthermore, the second connecting part is provided with at least one ventilation groove, which connects the outer wall and the inner wall of the second connecting part.

[0010] Furthermore, the first connecting portion includes a first abutting surface and a first annular surface, and the second connecting portion includes a second abutting surface and a second annular surface. The first abutting surface and the second abutting surface are perpendicular to the direction in which the elastic units are arranged, and the first annular surface and the second annular surface are parallel to the direction in which the elastic units are arranged.

[0011] A plastic pump core includes a plastic spring, a pump sleeve, a piston, a connecting tube, a fixed seat, and a movable tube. The piston is slidable within the pump sleeve. The fixed seat is fixedly installed at the upper opening of the pump sleeve, and the fixed seat forms a limit for the upward movement of the piston. The connecting tube passes through the piston. The movable tube is at least partially located within the pump sleeve and is slidable along the fixed seat. The upper end of the movable tube includes a fourth abutting surface and a fourth annular surface. The first abutting surface abuts against the fourth abutting surface, and the first annular surface abuts against the fourth annular surface. The fixed seat includes a third abutting surface and a third annular surface. The second abutting surface abuts against the third abutting surface, and a gap is provided between the second annular surface and the third annular surface.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model achieves high resilience of plastic springs by using an elastic unit structure design with outward bending of the side wall, replacing traditional metal springs and realizing the manufacturing of all-plastic pump cores. This meets the usage requirements of cosmetic packaging bottles while also satisfying overall recycling, saving time and effort and reducing labor costs.

[0014] 2. This utility model provides a ventilation groove in the second connecting part that connects the inside and outside of the plastic spring. The second annular surface of the second connecting part is left between the second connecting part and the mounting surface to balance the internal and external air pressure of the plastic spring, thereby improving the pressing and rebound effect of the plastic spring. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of Embodiment 1.

[0016] Figure 2 This is a cross-sectional view of Embodiment 2.

[0017] Reference numerals: 1. Plastic spring; 11. First connecting part; 111. First abutting surface; 112. First annular surface; 12. Elastic component; 121. Elastic unit; 1211. First elastic ring; 1212. Second elastic ring; 122. Outer rounded corner; 123. Inner rounded corner; 13. Second connecting part; 131. Second abutting surface; 132. Second annular surface; 133. Vent groove; 2. Pump sleeve; 3. Piston; 4. Connecting pipe; 5. Fixed seat; 51. Third abutting surface; 52. Third annular surface; 6. Movable pipe; 61. Fourth abutting surface; 62. Fourth annular surface. Detailed Implementation

[0018] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] Example 1:

[0020] like Figure 1As shown, this embodiment discloses a plastic spring including a plastic spring 1. The plastic spring 1 includes a first connecting part 11, an elastic component 12, and a second connecting part 13. The first connecting part 11 and the second connecting part 13 are respectively located at both ends of the elastic component 12, and the first connecting part 11 and the second connecting part 13 communicate with the interior of the elastic component 12. The elastic component 12 includes three elastic units 121, which are stacked and interconnected. The elastic unit 121 located in the middle of the elastic component 12 is a first elastic ring 1211, and the two elastic units 121 located at both ends of the elastic component 12 are second elastic rings 1212. The middle part of the sidewall of the elastic unit 121 bends outward and protrudes. When the plastic spring 1 is compressed, the bending angle of the elastic unit 121 under the compression force gradually decreases. The elastic unit 121 has elastic deformation capability, which allows the plastic spring 1 to be compressed and store force. When the force pressing down on the plastic spring 1 is removed, the elastic unit 121 can rebound and restore its original state. The bending angle of the elastic unit 121 is greater than the bending angle of the elastic units 121 at both ends of the elastic component 12. The bending angle of the first elastic ring 1211 is a, and the bending angle of the second elastic ring 1212 is b. a is greater than b. For example, a is 85° to 90°, and b is 75° to 80°. When the plastic spring 1 is compressed, the second elastic rings 1212 at both ends are connected to the first connecting part 11 and the second connecting part 13, respectively. To ensure that the deformation of the second elastic ring 1212 is not too large, the deformation of the second elastic ring 1212 will cause the connection at both ends to loosen. Therefore, the bending angle of the first elastic ring 1211 is set to be larger, so that the first elastic ring 1211 in the middle can be compressed and deformed to a greater extent. The second elastic rings 1212 at both ends can have better stability. The plastic spring 1 is made of plastic injection molding and has elastic deformation capability. The elastic unit 121 with arc-shaped sidewall can be squeezed better and has better resilience, which can realize the high resilience of the all-plastic pump and can replace the metal spring to reset the pump core after pressing.

[0021] More preferably, the outer side of the bend of the elastic unit 121 is provided with an outer rounded corner 122, and the inner side of the bend of the elastic unit 121 is provided with an inner rounded corner 123. Both the outer rounded corner 122 and the inner rounded corner 123 provide high resilience for the elastic unit 121 after it is compressed.

[0022] The first connecting part 11 is annular, and the wall thickness of the first connecting part 11 is greater than the wall thickness of the elastic unit 121. The second connecting part 13 is annular, and the wall thickness of the second connecting part 13 is greater than the wall thickness of the elastic unit 121. The first connecting part 11 and the second connecting part 13 serve as two connecting ends of the plastic spring 1. The stability of the connecting ends of the plastic spring 1 is increased by increasing the wall thickness of the first connecting part 11 and the second connecting part 13.

[0023] The second connecting part 13 is provided with a plurality of ventilation grooves 133, which are arranged in a ring shape on the second connecting part 13. The ventilation grooves 133 connect the outer wall and the inner wall of the second connecting part 13, and the ventilation grooves 133 can more quickly balance the air pressure inside and outside the plastic spring 1.

[0024] The first connecting part 11 includes a first abutting surface 111 and a first annular surface 112. The second connecting part 13 includes a second abutting surface 131 and a second annular surface 132. The first abutting surface 111 and the second abutting surface 131 are perpendicular to the direction of the elastic unit 121. The first annular surface 112 and the second annular surface 132 are parallel to the direction of the elastic unit 121. Since the first connecting part 11 and the second connecting part 13 are connected by an interference fit, the first abutting surface 111 and the second abutting surface 131 can be elastically supported by the plastic spring 1 and abut against the mounting plane at both ends. Since the material of the plastic spring 1 itself has deformability, the first annular surface 112 can be appropriately expanded and thus fixed to the mounting ring wall. The first connecting part 11 is fixed by the interference fit, so that the two connecting ends of the plastic spring 1 have better stability. Since the vent groove 133 is provided in the second connecting part 13, the second annular surface 132 and the mounting ring surface cannot be fitted together, and there needs to be a gap to allow air to pass through.

[0025] Example 2:

[0026] A plastic pump core uses the plastic spring 1, pump sleeve 2, piston 3, connecting pipe 4, fixed seat 5, and movable pipe 6 as described in Embodiment 1. The piston 3 can slide inside the pump sleeve 2. The fixed seat 5 is fixedly installed at the upper opening of the pump sleeve 2, and the fixed seat 5 forms a limit for the upward movement of the piston 3. The connecting pipe 4 passes through the piston 3. The movable pipe 6 is at least partially located inside the pump sleeve 2 and can slide along the fixed seat 5. The upper end of the movable pipe 6 includes a fourth abutment surface 61 and a fourth annular surface 62. A first abutment surface 111 abuts against the fourth abutment surface 61, and a first annular surface 112 abuts against the fourth annular surface 62. The fixed seat 5 includes a third abutment surface 51 and a third annular surface 52. A second abutment surface 131 abuts against the third abutment surface 51, and the second annular surface 132 abuts against the third abutment surface 52. A gap is provided between the annular surfaces 52, allowing the elastic component 12 to connect to the venting groove 133. When the movable tube 6 is pressed down, the plastic spring 1 is squeezed and deformed, and both the first elastic ring 1211 and the second elastic ring 1212 are deformed. The air inside the plastic spring 1 flows out from the venting groove 133. The movable tube 6 can drive the piston 3 and the connecting tube 4 downward. When the downward pressure of the movable tube 6 is removed, the compressed plastic spring 1 rebounds and resets, resetting the piston 3 and the connecting tube 4. The plastic spring 1 replaces the traditional metal spring, enabling the manufacture of all-plastic press pumps and all-plastic packaging bottles. This meets the usage requirements of plastic cosmetic packaging bottles while also satisfying the overall manufacturing and recycling of packaging bottles, thus reducing costs.

[0027] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A plastic spring, characterized in that, The plastic spring (1) comprises a first connecting part (11), an elastic part (12) and a second connecting part (13), the first connecting part (11) and the second connecting part (13) are respectively located at both ends of the elastic part (12), the first connecting part (11) and the second connecting part (13) communicate with the inside of the elastic part (12), the elastic part (12) comprises a plurality of elastic units (121), a plurality of the elastic units (121) are arranged in layers, a plurality of the elastic units (121) communicate with each other, the middle part of the side wall of the elastic unit (121) is bent outward, the bending angle of the elastic unit (121) located in the middle part of the elastic part (12) is greater than the bending angle of the elastic unit (121) located at both ends of the elastic part (12).

2. A plastic spring according to claim 1, wherein The number of the elastic units (121) is three, the elastic unit (121) located in the middle part of the elastic part (12) is a first elastic ring (1211), the two elastic units (121) located at both ends of the elastic part (12) are second elastic rings (1212), the bending angle of the first elastic ring (1211) is a, the bending angle of the second elastic ring (1212) is b, a is greater than b.

3. The plastic spring of claim 1, wherein The outer side of the bending part of the elastic unit (121) is provided with an outer fillet (122), and the inner side of the bending part of the elastic unit (121) is provided with an inner fillet (123).

4. The plastic spring of claim 1 wherein, The first connecting part (11) is annular, the wall thickness of the first connecting part (11) is greater than the wall thickness of the elastic unit (121), the second connecting part (13) is annular, and the wall thickness of the second connecting part (13) is greater than the wall thickness of the elastic unit (121).

5. The plastic spring of claim 1 wherein, The second connecting part (13) is provided with at least one ventilation groove (133), and the ventilation groove (133) communicates the outer wall and the inner wall of the second connecting part (13).

6. A plastic spring according to any one of claims 1-5, characterized in that The first connecting part (11) comprises a first abutting surface (111) and a first annular surface (112), the second connecting part (13) comprises a second abutting surface (131) and a second annular surface (132), the first abutting surface (111) and the second abutting surface (131) are perpendicular to the arrangement direction of the elastic unit (121), and the first annular surface (112) and the second annular surface (132) are parallel to the arrangement direction of the elastic unit (121).

7. A plastic pump core, characterized in that The plastic spring (1), the pump sleeve (2), the piston (3), the connecting pipe (4), the fixed seat (5), and the movable pipe (6) are included in claim 6. The piston (3) can slide in the pump sleeve (2). The fixed seat (5) is fixedly installed on the upper end opening of the pump sleeve (2) and forms the limit of the upward movement of the piston (3). The connecting pipe (4) passes through the piston (3). The movable pipe (6) is at least partially located in the pump sleeve (2) and can slide along the fixed seat (5). The upper end of the movable pipe (6) includes a fourth abutting surface (61) and a fourth annular surface (62). The first abutting surface (111) abuts against the fourth abutting surface (61), and the first annular surface (112) abuts against the fourth annular surface (62). The fixed seat (5) includes a third abutting surface (51) and a third annular surface (52). The second abutting surface (131) abuts against the third abutting surface (51), and a gap is provided between the second annular surface (132) and the third annular surface (52).

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