Long type self-locking pump made entirely of plastic

Abstract

The present invention discloses a long-type self-locking pump made entirely of plastic, which includes a lock cap that can be fixed to a liquid storage container, and the lock cap is provided with a pump body and a lock cover that can fix the pump body to the lock cap. The pump body is provided with a liquid storage chamber, a communication port that communicates with the liquid storage chamber, a check valve that can control the opening of the communication port, a pump rod that can slide up and down relatively and whose tip penetrates the lock cover, and a piston that is fitted to the pump rod and driven by the pump rod. The piston is hermetically inserted into the liquid storage chamber, thereby causing the piston to move within the liquid storage chamber. A pressure chamber is formed below the piston, and when the piston moves upward, a negative pressure is created in the pressure chamber, causing the check valve to open and liquid to enter the pressure chamber. A push head is provided at the tip of the pump rod to drive the pump rod downward, causing the piston to push the liquid in the storage chamber downward and out. A connector is provided at the bottom end of the pump rod, penetrating the piston downward and extending into the pressure chamber. A plastic spring is provided within the pressure chamber, one end of which is connected to the connector and which urges the pump rod to return upward. The plastic spring includes multiple elastic units connected from top to bottom.

Description

[Technical Field]

[0001] The present invention relates to a long-type self-locking pump made entirely of plastic. [Background technology]

[0002] Liquid products, such as bath milk and shampoo, are essential in people's daily lives. These products are typically packaged in specially designed containers, and a push pump presses the top of the container to force the liquid through a nozzle-type pump head. A push pump typically consists of a push head, a locking cover, a metal spring, a screw cap, a body, a main shaft, a piston, a sub-shaft, a check valve, and a straw. The metal spring resets the push head, and the remaining components are plastic. When a push pump is recovered and remolded, the metal spring must be manually removed and remolded, which is time-consuming and labor-intensive, resulting in low production efficiency. Furthermore, the metal spring may come into direct contact with the emulsion in the pump chamber, causing rust and contaminating the liquid, adversely affecting the product's long-term use.

[0003] Therefore, the present invention has been made in consideration of the above problems. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE INVENTION An object of the present invention is to overcome the drawbacks of the prior art and to provide a long-type self-locking pump that is made entirely of plastic and has a simple structure and is easy to recover. [Means for solving the problem]

[0005] The present invention is realized by the following technical solutions:

[0006] The long-type self-locking pump, which is made entirely of plastic, includes a lock cap 1 that can be fixed to a liquid storage container, and the lock cap 1 is provided with a pump body 2 and a lock cover 3 that can fix the pump body 2 to the lock cap 1. The pump body 2 is provided with a liquid storage chamber 21, a communication port 22 that communicates with the liquid storage chamber 21, a check valve 4 that can control the opening of the communication port 22 so as to allow liquid to enter the liquid storage chamber 21, a pump rod 5 that is slidable up and down relatively and has a tip that passes through the lock cover 3, and a piston 8 that is fitted onto the pump rod 5 and driven by the pump rod 5. The piston 8 is hermetically inserted into the liquid storage chamber 21, thereby allowing liquid to flow into the liquid storage chamber 21. a pressure chamber is formed below the piston 8, and when the piston 8 moves upward, a negative pressure is generated in the pressure chamber, causing the check valve 4 to open and allow the liquid to enter the pressure chamber; a push head 6 is provided at the tip of the pump rod 5 to drive the pump rod 5 downward, causing the piston 8 to push the liquid in the liquid storage chamber 21 downward and out; a connector 53 is provided at the bottom end of the pump rod 5, penetrating the piston 8 downward and extending into the pressure chamber; and a plastic spring 7 is provided within the pressure chamber, one end of which is connected to the connector 53 and which urges the pump rod 5 upward and then returns to its original position; and the plastic spring 7 includes a plurality of elastic units connected from top to bottom.

[0007] In the above-mentioned long-type self-locking pump made entirely of plastic, the elastic unit includes a plurality of support connector sheets 71 spaced apart from one another from bottom to top, and elastic sheets 72 are provided between adjacent support connector sheets 71.

[0008] In the long-type self-locking pump made entirely of plastic, the elastic sheet 72 is provided at both ends with positioning posts 73 that extend in the vertical direction and come into contact with each other when the elastic sheet 72 is extruded and deformed.

[0009] In the above-mentioned long-type self-locking pump made entirely of plastic, the elastic sheet 72 is an arc-shaped elastic sheet that protrudes in a direction away from the central axis of the plastic spring 7.

[0010] In the long-type self-locking pump made entirely of plastic, the elastic unit includes two X-shaped cantilever springs 74 arranged opposite each other, with the ends of the two X-shaped cantilever springs 74 connected in a one-to-one correspondence and surrounding a vertical through-hole 75, and the X-shaped cantilever springs 74 located at the top and bottom of the plastic spring 7 are respectively connected to supporting connector sheets 71.

[0011] In the long-type self-locking pump made entirely of plastic, the elastic unit includes two arc-shaped elastic bars 77 arranged opposite each other and connected at their ends in a one-to-one correspondence to surround a ring, and three adjacent elastic units are connected head to tail in sequence to form a Z-shaped structure, and the arc-shaped elastic bars 77 located at the top and bottom of the plastic spring 7 are respectively connected to supporting connector sheets 71.

[0012] The long-type self-locking pump, which is made entirely of plastic, is characterized in that the support connector sheet 71 at at least one end is provided with an insertion hole 711 for inserting and positioning the connector 53.

[0013] In the above-mentioned long-type self-locking pump made entirely of plastic, the support connector sheet 71 has a circular sheet structure.

[0014] The above-mentioned long-type self-locking pump, which is made entirely of plastic, is characterized in that a positioning block 61 is provided on the push head 6, and a bayonet lock 31 is provided to sandwich and abut the positioning block 61 against the lock cover 3, locking the push head 6 and preventing it from moving downward, and a slide groove 32 is provided to allow the positioning block 61 to slide up and down when the push head 6 is rotated to release the positioning block 61 from the bayonet lock 31. [Effects of the Invention]

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. This invention replaces metal springs with plastic springs with excellent rebound performance, and the remaining parts are all made of plastic. When recycling the pump, there is no need to remove the springs; they can be directly recycled and remolded, which makes production efficient, energy-saving, and environmentally friendly.

[0017] 2. The plastic spring is made of multiple elastic units and is molded as a single unit. It has a simple structure and is easy to mold and manufacture. The effective stroke of the plastic spring is long and wide, so springs with different elastic forces can be produced as needed to be applied to different push pumps. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a perspective view of the present invention. [Figure 2] FIG. 1 is a cross-sectional view of a first embodiment of the present invention. [Figure 3] 1 is a perspective view of a first embodiment of a plastic spring according to the present invention; [Figure 4] FIG. 10 is a cross-sectional view of a second embodiment of the present invention. [Figure 5] FIG. 10 is a perspective view of a second embodiment of a plastic spring according to the present invention. [Figure 6] FIG. 10 is a cross-sectional view of a third embodiment of the present invention. [Figure 7] FIG. 10 is a perspective view of a third embodiment of a plastic spring according to the present invention. [Figure 8] 1 is a perspective view of a push head according to the present invention; [Figure 9] FIG. 2 is a perspective view of a lock cover according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] The present invention will now be further described with reference to the drawings.

[0020] Example 1 As shown in Figures 1 to 3, the long-type self-locking pump made entirely of plastic includes a lock cap 1 that can be fixed to a liquid storage container, and the lock cap 1 is provided with a pump body 2 and a lock cover 3 that can fix the pump body 2 to the lock cap 1. The pump body 2 includes a liquid storage chamber 21, a communication port 22 that communicates with the liquid storage chamber 21, a check valve 4 that can control the opening of the communication port 22 to allow liquid to enter the liquid storage chamber 21, a pump rod 5 that can slide up and down relatively and has a tip that penetrates the lock cover 3, and a piston 8 that is fitted onto the pump rod 5 and driven by the pump rod 5, and the piston 8 is provided so as to be sealed and inserted into the liquid storage chamber 21. Thus, a pressure chamber is formed below the piston 8 within the liquid storage chamber 21. When the piston 8 moves upward, negative pressure is generated in the pressure chamber, opening the check valve 4 and allowing liquid to enter the pressure chamber. A push head 6 is provided at the tip of the pump rod 5, driving the pump rod 5 downward so that the piston 8 pushes the liquid in the liquid storage chamber 21 downward and out. A connector 53 is provided at the bottom end of the pump rod 5, penetrating the piston 8 downward and extending into the pressure chamber. A plastic spring 7 is provided within the pressure chamber, one end of which is connected to the connector 53 and urges the pump rod 5 upward and then returns to its original position. The plastic spring 7 includes a plurality of elastic units connected from top to bottom. The present invention replaces metal springs with plastic springs, which have excellent resilience, and the remaining components are all made of plastic. When the push pump is to be recycled, there is no need to remove the spring, as it can be directly recycled and remolded, resulting in high production efficiency, energy saving, and environmental friendliness. The plastic spring is integrally molded with multiple elastic units, has a simple structure, is easy to mold and manufacture, and has a long and wide effective stroke, so that springs with different elastic forces can be produced as needed to be applied to different push pumps.

[0021] In one embodiment of the plastic spring, the elastic unit includes a plurality of support connector sheets 71 spaced apart from one another from bottom to top, with elastic sheets 72 provided between adjacent support connector sheets 71, and the above structure can improve the force-bearing stability and elasticity of the plastic spring.

[0022] Specifically, positioning posts 73 are provided on both ends of the elastic sheet 72. These posts 73 extend in the vertical direction and come into contact with each other when the elastic sheet 72 is extruded and deformed. When the plastic spring is compressed into a predetermined position, the positioning posts 73 come into contact with each other to form a stopper, preventing damage to the plastic spring due to excessive compression.

[0023] Specifically, the elastic sheet 72 is an arc-shaped elastic sheet that protrudes away from the central axis of the plastic spring 7, and when the plastic spring is compressed, the arc-shaped elastic sheet bends and deforms outward from the plastic spring 7, storing elastic force and having relatively high elasticity.

[0024] Specifically, an insertion hole 711 is provided in at least one end of the support connector sheet 71 for inserting and positioning the connector 53, and the pump rod is designed so that when the plastic spring is compressed, the deformation is stable and no misalignment occurs due to the engagement between the connector 53 and the insertion hole 711 and the plastic spring.

[0025] Specifically, the support connector sheet 71 is a circular sheet-like structure, and all of the circular sheet-like structures are coaxial and parallel, with the circular sheet-like structure located below the spring abutting the bottom wall of the liquid storage chamber, and the circular sheet-like structure located above the spring abutting the pump rod.

[0026] As shown in Figure 8, a positioning block 61 is provided on the push head 6, and as shown in Figure 9, a bayonet lock 31 is provided to sandwich and abut the positioning block 61 against the lock cover 3, locking the push head 6 and preventing it from moving downward, and a slide groove 32 is provided to allow the positioning block 61 to slide up and down when the push head 6 is rotated to release the positioning block 61 from the bayonet lock 31. When the positioning block on the push head rotates into the slide groove position on the lock cover, the push head can be pushed down, and when the positioning block on the push head rotates into the bayonet lock position on the lock cover, the positioning block abuts the bayonet lock, restricting the button from being pressed down and achieving self-locking.

[0027] Example 2 As shown in Figures 4 and 5, the main difference between Example 2 and Example 1 is the structure of the plastic spring. In this example, the elastic unit includes two X-shaped cantilever springs 74 arranged opposite each other, and the ends of the two X-shaped cantilever springs 74 are connected in a one-to-one correspondence, surrounding a vertical through-hole 75. Support connector sheets 71 are respectively connected to the X-shaped cantilever springs 74 located at the top and bottom of the plastic spring 7.

[0028] Example 3 6 and 7, the main difference between Example 3 and Example 1 is the structure of the plastic spring, in which the elastic units are arranged opposite each other and connected at their ends in a one-to-one correspondence, including two circular arc elastic bars 77 surrounding a ring, and three adjacent elastic units are connected head to tail in sequence to form a Z-shaped structure, and the circular arc elastic bars 77 located at the top and bottom of the plastic spring 7 are respectively connected to supporting connector sheets 71. The two supporting connector sheets 71 are parallel circular ring-shaped sheet structures, and the circular arc elastic bars 77 are inclined around the ring structure, with the inclination directions of the two adjacent elastic units from top to bottom being opposite. With this structure, the elastic units have excellent deformation stability and maintain good axial elastic force.

[0029] In the present invention, a liquid discharge passage 51 communicating with the liquid discharge end of the push head 6 is provided within the pump rod 5, and a liquid inlet hole 52 sealed by the piston 8 is provided at the bottom end of the pump rod 5. Pressing the push head 6 causes the pump rod 5 to move downward relative to the piston 8, opening the liquid inlet hole 52 and allowing the liquid in the pressure chamber to enter the liquid discharge passage 51. Pressing the upper push head 6 drives the pump rod 5, causing it to move downward relative to the piston 8 and opening the liquid inlet hole 52. Further pressure on the push head 6 causes the pump rod 5 to drive the piston 8 downward, generating air pressure and sending the liquid in the pressure chamber through the liquid inlet 52 and the liquid discharge passage 51 to the liquid discharge end of the push head 6. After the push head 6 is pressed down to pump the liquid, the plastic spring 7 biases the pump rod 5, driving the piston 8 upward and returning, creating negative pressure in the pressure chamber, sucking the liquid from the container for consumption.

[0030] (Addendum) (Appendix 1) The pump includes a lock cap (1) that can be fixed to a liquid storage container, and the lock cap (1) is provided with a pump body (2) and a lock cover (3) that can fix the pump body (2) to the lock cap (1). The pump body (2) is provided with a liquid storage chamber (21), a communication port (22) that communicates with the liquid storage chamber (21), a check valve (4) that can control the opening of the communication port (22) so as to allow liquid to enter the liquid storage chamber (21), a pump rod (5) that is slidable up and down relative to the pump rod (5) and whose tip penetrates the lock cover (3), and a piston (8) that is fitted to the pump rod (5) and driven by the pump rod (5). The piston (8) is hermetically inserted into the liquid storage chamber (21), thereby forming a pressure chamber below the piston (8), and the piston (8) is provided with a pressure chamber below the piston (8) in the liquid storage chamber (21). A long-type self-locking pump made entirely of plastic, characterized in that when the piston (8) moves upward, a negative pressure is generated in the pressure chamber, causing the check valve (4) to open and liquid to enter the pressure chamber, and a push head (6) is provided at the tip of the pump rod (5) so that when the piston (8) moves downward, the pump rod (5) is driven downward, causing the piston (8) to push the liquid in the liquid storage chamber (21) downward and out, and a connector (53) is provided at the bottom end of the pump rod (5) so that it penetrates the piston (8) downward and extends into the pressure chamber, and a plastic spring (7) is provided in the pressure chamber, one end of which is connected to the connector (53) and which urges the pump rod (5) to return it upward, and the plastic spring (7) includes a plurality of elastic units connected from top to bottom.

[0031] (Appendix 2) The long-type self-locking pump made entirely of plastic according to Appendix 1, characterized in that the elastic unit includes a plurality of support connector sheets (71) spaced apart from one another from bottom to top, and elastic sheets (72) are provided between adjacent support connector sheets (71).

[0032] (Appendix 3) The long-type self-locking pump made entirely of plastic according to Appendix 2, characterized in that the elastic sheet (72) is provided at both ends with positioning posts (73) that extend in the vertical direction and come into contact with each other when the elastic sheet (72) is extruded and deformed.

[0033] (Appendix 4) The long-type self-locking pump made entirely of plastic described in Appendix 2, characterized in that the elastic sheet (72) is an arc-shaped elastic sheet that protrudes in a direction away from the central axis of the plastic spring (7).

[0034] (Appendix 5) The long-type self-locking pump made entirely of plastic according to Appendix 1, characterized in that the elastic unit includes two X-shaped cantilever springs (74) arranged opposite each other, the ends of the two X-shaped cantilever springs (74) being connected in a one-to-one correspondence, and surrounding a vertical through-hole (75), support connector sheets (71) are connected to the X-shaped cantilever springs (74) located at the top and bottom of the plastic spring (7), respectively.

[0035] (Appendix 6) The long-type self-locking pump made entirely of plastic according to Appendix 1, characterized in that the elastic unit includes two arc-shaped elastic bars (77) arranged opposite each other and connected at their ends in a one-to-one correspondence to surround a ring, three adjacent elastic units are connected at their ends in order to form a Z-shape, and support connector sheets (71) are connected to the arc-shaped elastic bars (77) located at the top and bottom of the plastic spring (7), respectively.

[0036] (Appendix 7) A long-type self-locking pump made entirely of plastic according to any one of appendices 2 to 6, characterized in that an insertion hole (711) is provided in at least one end of the support connector sheet (71) for inserting and positioning a connector (53).

[0037] (Appendix 8) 8. The long-type self-locking pump made entirely of plastic according to claim 7, wherein the support connector sheet (71) has a circular sheet structure.

[0038] (Appendix 9) The long-type self-locking pump made entirely of plastic according to Appendix 1 is characterized in that a positioning block (61) is provided on the push head (6), and a bayonet lock (31) is provided to sandwich and abut the positioning block (61) against the lock cover (3), locking the push head (6) and preventing it from moving downward, and a slide groove (32) is provided to allow the positioning block (61) to slide up and down when the push head (6) is rotated and the positioning block (61) is released from the bayonet lock (31).

Claims

1. The pump includes a lock cap (1) that can be fixed to a liquid storage container, the lock cap (1) being provided with a pump body (2) and a lock cover (3) that can fix the pump body (2) to the lock cap (1), the pump body (2) being provided with a liquid storage chamber (21), a communication port (22) that communicates with the liquid storage chamber (21), a check valve (4) that can control the opening of the communication port (22) so as to allow liquid to enter the liquid storage chamber (21), a pump rod (5) that is relatively slidable up and down and whose tip penetrates the lock cover (3), and a piston (8) that is fitted to the pump rod (5) and driven by the pump rod (5), the piston (8) being hermetically inserted into the liquid storage chamber (21) to form a pressure chamber below the piston (8), and the piston (8) is provided with a pressure chamber below the piston (8) in the liquid storage chamber (21). a push head (6) provided at the tip of the pump rod (5) for driving the piston (8) downward so that the piston (8) pushes the liquid in the liquid storage chamber (21) downward and causes it to flow out; a connector (53) provided at the bottom end of the pump rod (5) for penetrating the piston (8) downward and extending into the pressure chamber; a plastic spring (7) provided in the pressure chamber, one end of which is connected to the connector (53) and which urges the pump rod (5) to return upward; and the plastic spring (7) including a plurality of elastic units connected from top to bottom.

2. 2. The long-type, all-plastic self-locking pump according to claim 1, characterized in that the elastic unit includes a plurality of support connector sheets (71) spaced apart from one another from bottom to top, and elastic sheets (72) are provided between adjacent support connector sheets (71).

3. 3. The long-type self-locking pump made entirely of plastic according to claim 2, characterized in that the elastic sheet (72) is provided at both ends with positioning posts (73) that extend in the vertical direction and come into contact with each other when the elastic sheet (72) is extruded and deformed.

4. 3. The long-type self-locking pump made entirely of plastic according to claim 2, wherein the elastic sheet (72) is an arc-shaped elastic sheet that protrudes in a direction away from the central axis of the plastic spring (7).

5. 2. The long-type all-plastic self-locking pump according to claim 1, characterized in that the elastic unit includes two X-shaped cantilever springs (74) arranged opposite each other, the ends of the two X-shaped cantilever springs (74) are connected in a one-to-one correspondence, and support connector sheets (71) are connected to the X-shaped cantilever springs (74) located at the top and bottom of the plastic spring (7) surrounding a vertical through-hole (75).

6. 2. The long-type all-plastic self-locking pump according to claim 1, characterized in that the elastic unit includes two arc-shaped elastic bars (77) arranged opposite each other and connected at their ends in a one-to-one correspondence to surround a ring, and three adjacent elastic units are connected head to tail in a Z-shape, and supporting connector sheets (71) are connected to the arc-shaped elastic bars (77) located at the top and bottom of the plastic spring (7), respectively.

7. 7. A long-type self-locking pump made entirely of plastic according to any one of claims 2 to 6, characterized in that an insertion hole (711) is provided in the support connector sheet (71) at at least one end for inserting and positioning a connector (53).

8. 8. The long-type, all-plastic self-locking pump according to claim 7, wherein the support connector seat (71) has a ring-shaped structure.

9. 2. The long-type self-locking pump made entirely of plastic according to claim 1, characterized in that a positioning block (61) is provided on the push head (6), and a bayonet lock (31) is provided to sandwich and abut the positioning block (61) against the lock cover (3), locking the push head (6) and preventing it from moving downward, and a slide groove (32) is provided to allow the positioning block (61) to slide up and down when the push head (6) is rotated to release the positioning block (61) from the bayonet lock (31).

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