Press pump

Abstract

A push-button pump, installed on the opening of a container, includes: a pressure head with a nozzle for discharging liquid; a cylinder head for sealing a cylinder; a toothed sleeve connected to the opening of the container; a cylinder equipped with a one-way valve; a piston rod, one end connected to the pressure head and the other end having a piston extending into the internal space of the cylinder; the cylinder head and the toothed sleeve fixedly connected to the cylinder; a first anti-opening mechanism provided between the pressure head and the cylinder head; and a second anti-opening mechanism provided between the cylinder head and the toothed sleeve. The first anti-opening mechanism is configured to allow the pressure head to rotate in the locking direction but prevent it from rotating in the unlocking direction; the second anti-opening mechanism is configured to allow the toothed sleeve to rotate in the tightening direction but prevent it from rotating in the opening direction. When the pressure head is used to unlock against a large torque, it ensures that the cylinder head is not rotated, thus preventing the pressure head from being unlocked and opened after impact, and allowing consumers to easily unlock and use the pressure head after receiving the product.

Description

Technical Field

[0001] This utility model relates to a press pump, and more specifically to an anti-opening emulsion pump. The emulsion pump is particularly a press-type emulsion pump. Background Technology

[0002] Press pumps are installed on containers containing daily chemical products for dispensing. They are convenient to use and are favored by many consumers.

[0003] Figure 7 A cross-sectional view of a conventional emulsion pump in its locked position is shown. Figure 7 As shown, the emulsion pump 100 includes a pressure head 110 with an outlet, a cylinder head 120, a piston sleeve 130, a cylinder 140, and a piston rod 150. The upper end of the piston rod 150 is connected to the pressure head 110, and its lower end is provided with a piston, extending into the internal space of the cylinder 140. The cylinder head 120 and the piston sleeve 130 are fixedly connected to the cylinder 140. The piston sleeve 130 is connected to the opening of a container by a structure such as threads, thereby mounting the emulsion pump 100 onto the container. In the installed state, the cylinder 140 extends into the container.

[0004] A first spring seat 151 is provided at the lower part of the piston rod 150, and correspondingly, a second spring seat 152 is provided in the cylinder 140. A compression spring 160 is supported between the first spring seat 151 and the second spring seat 152. The compression spring 160 applies an upward biasing force to the piston rod 150.

[0005] The pressure head 110 can be detachably connected to the cylinder head 120 via a connection structure such as a thread. When the pressure head 110 is connected to the cylinder head 120, the pressure head 110 can be held in a lower locked state. When the pressure head 110 rotates and disengages from the cylinder head 120, the piston rod 150 moves upward under the biasing force of the compression spring 160, thereby causing the pressure head 110 to move upward.

[0006] A first valve 170 is provided on the cylinder 140, and a piston head 180 is provided at the bottom of the piston rod 150, forming a one-way valve with the corresponding piston. The first valve 170 is also a one-way valve, and its flow direction is the same as that of the one-way valve at the piston head 180. When the pressure head 110 is in the unlocked position, the user can press the pressure head 110 downward against the biasing force of the spring 150. At this time, the space between the first valve 170 and the piston rod 150 is compressed, thereby increasing the pressure therein. Under this pressure, the product between the first valve 170 and the piston rod 150 flows into the piston rod 150 and is discharged through the outlet of the pressure head 110. When the user removes pressure from the pressure head 110, the piston rod 150, along with the pressure head 110, moves upward under the upward biasing force of the spring. At this time, the space between the first valve 170 and the piston rod 150 expands. During this process, due to the friction between the cylinder and the piston, the piston moves downward relative to the piston head 180, thereby closing the corresponding one-way valve. At this point, the pressure between the first valve 170 and the piston rod 150 decreases. Under this pressure difference, the first valve 170 opens, allowing liquid from the container to flow into the space between the first valve 170 and the piston rod 150.

[0007] With the rise of e-commerce platforms, consumers now prefer online shopping. Traditional push-button pumps, after being subjected to bumps and impacts during transportation, sometimes experience issues such as the pump head unlocking or even detaching, leading to leakage. Sometimes, because the unlocking direction of the pump head is designed to match the opening direction of the dental braces, the braces may unscrew from the container as the pump head unlocks, causing consumer dissatisfaction. Therefore, the traditional push-button pump has been structurally improved by increasing the unlocking torque of the pump head to prevent it from easily unlocking during transportation.

[0008] At the same time, this presents consumers with a new problem: they are unable to open and use the product after receiving it. Because the unlocking torque of the pressure head is relatively large, it transmits torque to the cylinder head during unlocking, and then to the cylinder via the cylinder head. However, since the cylinder and container are only prevented from rotating by friction, if this friction is less than the unlocking torque of the pressure head, the pressure head will cause the cylinder head to rotate, resulting in the pressure head being unable to open.

[0009] To solve this problem, a new anti-opening press pump needs to be designed. Utility Model Content

[0010] This utility model was made to solve the above problems. Its purpose is to provide a press pump in which the cylinder head is not driven to rotate when the press head is unlocked to overcome a large torque. This not only avoids leakage caused by the press head being unlocked after the press pump is impacted during transportation, but also allows consumers to unlock and use the press head smoothly after receiving the product.

[0011] One aspect of this utility model relates to a press pump, which is installed on the opening of a container and includes: a press head having a nozzle for discharging liquid; a cylinder head for sealing a cylinder; a toothed sleeve connected to the opening of the container; a cylinder with a one-way valve inside; a piston rod, one end of which is connected to the press head, and the other end of which has a piston extending into the internal space of the cylinder; the cylinder head and the toothed sleeve being fixedly connected to the cylinder; a first anti-opening mechanism being provided between the press head and the cylinder head; and a second anti-opening mechanism being provided between the cylinder head and the toothed sleeve. The first anti-opening mechanism is configured to allow the press head to rotate in the locking direction but prevent it from rotating in the unlocking direction; the second anti-opening mechanism is configured to allow the toothed sleeve to rotate in the tightening direction but prevent it from rotating in the opening direction.

[0012] The press pump with the above structure includes a first anti-opening mechanism between the press head and the cylinder head, and a second anti-opening mechanism between the cylinder head and the threaded sleeve. The first anti-opening mechanism allows the press head to rotate in the locking direction but prevents it from rotating in the unlocking direction. The second anti-opening mechanism allows the threaded sleeve to rotate in the tightening direction but prevents it from rotating in the opening direction. This prevents leakage caused by the press head being unlocked and opened due to impact during transportation. Furthermore, it ensures that the cylinder head is not rotated when the press head is unlocked against a large torque.

[0013] Preferably, the unlocking direction of the pressure head is set to be the same as the tightening direction of the dental brace.

[0014] This prevents the braces from being opened from the container opening when the pressure head is unlocked.

[0015] As a specific structure, the first anti-opening mechanism includes: at least one toothed plate, the toothed plate being disposed on either the pressure head or the cylinder head; and at least one toothed block, the toothed block being disposed on the other side of the pressure head and the cylinder head. The second anti-opening mechanism includes: at least one first stop block, the first stop block being disposed on either the cylinder head or the gear sleeve; and at least one second stop block, the second stop block being disposed on the other side of the cylinder head and the gear sleeve.

[0016] According to this structure, the engagement of the toothed plate and the toothed block allows the pressure head to rotate in the locking direction and prevents it from rotating in the unlocking direction. The cooperation of the first stop and the second stop allows the toothed ferrule to rotate in the tightening direction and prevents it from rotating in the opening direction.

[0017] Ideally, at least one of the toothed plates is disposed on the inner ring of the pressure head. The toothed plate includes a first guide surface and a first blocking surface. The first guide surface extends from the inner surface of the sleeve of the pressure head along the unlocking direction of the pressure head. The first blocking surface is disposed on the side of the toothed plate opposite to the first guide surface. At least one toothed block is disposed on the outer surface of the cylinder head. The toothed block includes a second guide surface and a second blocking surface. The second guide surface extends from the outer surface of the sleeve of the cylinder head along the locking direction of the pressure head. The second blocking surface is disposed on the side of the toothed block opposite to the second guide surface.

[0018] With this structure, the pressure head can rotate in the unlocking direction by the relative movement of the first guide surface and the second guide surface, and the second blocking surface can prevent the pressure head from rotating in the unlocking direction by blocking the toothed plate.

[0019] Furthermore, at least one first stop is disposed on the inner surface of the cylinder head. The first stop includes a third guide surface and a third blocking surface. The third guide surface extends from the inner surface of the outer ring of the cylinder head along the tightening direction of the dental aligner. The third blocking surface is disposed on the side of the first stop opposite to the third guide surface. At least one second stop is disposed on the outer surface of the dental aligner. The second stop includes a fourth guide surface and a fourth blocking surface. The fourth guide surface extends from the outer surface of the upper ring of the dental aligner along the opening direction of the dental aligner. The fourth blocking surface of the second stop is disposed on the side of the second stop opposite to the fourth guide surface.

[0020] With this structure, the relative movement of the third and fourth guide surfaces allows the braces to rotate in the tightening direction, while the third blocking surface prevents the braces from rotating in the opening direction.

[0021] Preferably, the gap between the reference surface of the toothed plate and the toothed block is greater than or equal to the sum of the thickness of the toothed plate and the thickness of the toothed block.

[0022] This configuration ensures reliable meshing and smooth rotation between the gear teeth and the gear blocks.

[0023] In addition, an anti-opening tooth is provided on the inner side of the braces, which is provided in such a way that it extends obliquely from the inner side of the lower ring of the braces.

[0024] By setting anti-opening teeth on the inside of the braces, the ability to prevent them from loosening from the container is enhanced. Attached Figure Description

[0025] Figure 1a This is a cross-sectional view of the press pump of this utility model in the locked position.

[0026] Figure 1b This is a top view of the push pump of this utility model.

[0027] Figure 2 It is a 3D diagram of the pressure head.

[0028] Figure 3a It is a 3D view of the cylinder head.

[0029] Figure 3b This is another 3D view of the cylinder head.

[0030] Figure 4a It's a 3D diagram of braces.

[0031] Figure 4b This is another 3D view of braces.

[0032] Figure 5 This is a cross-sectional view along line AA in Figure 1.

[0033] Figure 6 This is a cross-sectional view along line BB in Figure 1.

[0034] Figure 7 This is a cross-sectional view of the locked position of an existing emulsion pump.

[0035] (Symbol Explanation)

[0036] 1. Emulsion pump

[0037] 10 pressure heads

[0038] 11. Press nozzle

[0039] 12 casings

[0040] 14 toothed plates

[0041] 20 Cylinder head

[0042] 21 Sleeve

[0043] 22 Outer ring

[0044] 24 tooth blocks

[0045] 27 First stop

[0046] 30 braces

[0047] 32 Second stop

[0048] 33 Lower Circle

[0049] 34 Anti-opening teeth

[0050] 40 cylinders

[0051] 50 Piston Rod

[0052] 60 springs

[0053] 141 First guide surface

[0054] 142 First blocking surface

[0055] 241 Second guide surface

[0056] 242 Second blocking surface Detailed Implementation

[0057] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. It should be understood that the embodiments shown in the drawings are merely preferred embodiments of this utility model and do not constitute a limitation on the scope of this utility model. Those skilled in the art can make various obvious modifications, variations, and equivalent substitutions to this utility model based on the embodiments shown in the drawings, all of which fall within the protection scope of this utility model.

[0058] It should be noted that the terms "up" and "down" used in this text refer to directions relative to the emulsion pump being placed in a vertical orientation (i.e., the emulsion pump being set so that its axis is aligned with the vertical direction). Additionally, "unlock" and "lock" refer to the movement of the pressure head, while "tighten" and "open" refer to the movement of the dental braces.

[0059] Figure 1a This is a cross-sectional view of the press pump of this utility model in the locked position. Figure 1b This is a top view of the push pump of this utility model.

[0060] like Figure 1a As shown, the emulsion pump 1 includes a pressure head 10, a cylinder head 20, a toothed sleeve 30, a cylinder 40, and a piston rod 50. The upper end of the piston rod 50 is connected to the pressure head 10, and a piston is provided at the lower end of the piston rod 50, extending into the internal space of the cylinder 40. The internal space of the piston rod 50 communicates with the outlet of the nozzle 11 on the pressure head 10. The cylinder head 20 and the toothed sleeve 30 are fixedly connected to the cylinder 40. The toothed sleeve 30 is connected to the opening of the container by a structure such as threads, thereby mounting the emulsion pump 1 onto the container. In the installed state, the cylinder 40 extends into the container.

[0061] A spring 60 is provided between the cylinder 40 and the piston rod 50, which applies an upward force to the piston rod 50. When the pressure head 10 is connected to the cylinder head 20, the pressure head 10 can be held in the lower locked position. Figure 1b As shown, when the pressure head 10 is rotated in the unlocking direction and disengaged from the cylinder head 20, the piston rod 50 moves upward under the biasing force of the spring 60, thereby causing the pressure head 10 to move upward.

[0062] A first anti-opening mechanism is provided between the pressure head 10 and the cylinder head 20, and a second anti-opening mechanism is provided between the cylinder head 20 and the gear sleeve 30.

[0063] like Figure 2 and Figure 3a As shown, the first anti-opening mechanism includes: at least one toothed piece 14 disposed on the inner ring of the pressure head 10; and at least one toothed block 24 disposed on the outer side of the sleeve 21 of the cylinder head 20. These toothed pieces 14 and toothed blocks 24 are designed to allow the pressure head 10 to rotate in the locking direction while preventing it from rotating in the unlocking direction.

[0064] Specifically, the toothed plate 14 includes a first guide surface 141 and a first blocking surface 142. The first guide surface 141 extends from the inner surface of the sleeve 12 of the pressure head 10 along the unlocking direction of the pressure head 10 and forms a certain angle with the tangent direction of the pressure head 10. The first blocking surface 142 is disposed on the side of the toothed plate 14 opposite to the first guide surface 141. The angle between the first guide surface 141 and the tangent direction of the pressure head 10 is smaller than the angle between the first blocking surface 142 and the tangent direction of the pressure head 10.

[0065] Correspondingly, at least one toothed block 24 is provided on the outer surface of the sleeve 21 of the cylinder head 20. This toothed block 24 also includes a second guide surface 241 and a second blocking surface 242. The second guide surface 241 of the toothed block 24 extends from the outer surface of the sleeve 21 of the cylinder head 20 along the locking direction of the pressure head 10 and forms an angle with the tangent direction of the cylinder head 20. The second blocking surface 242 of the toothed block 24 is provided on the side of the toothed block 24 opposite to the second guide surface 241. The angle between the second guide surface 241 and the tangent direction of the cylinder head 20 is smaller than the angle between the second blocking surface 242 and the tangent direction of the cylinder head 20.

[0066] It should be noted that since the pressure head 10 and the cylinder head 20 are installed approximately coaxially, the tangential direction of the pressure head 10 and the tangential direction of the cylinder head 20 are also approximately the same.

[0067] Based on the aforementioned toothed plate 14 and toothed block 24, when the pressure head 10 is rotated in the locking direction, the first guide surface 141 of the toothed plate 14 of the pressure head 10 moves towards the second guide surface 241 of the toothed block 24 of the cylinder head 20. At this time, the interaction between the first guide surface 141 and the second guide surface 241 will cause the toothed plate 14 to elastically deform, thereby allowing the toothed plate 14 to pass over the toothed block 24. When the pressure head 10 is rotated in the unlocking direction, the first blocking surface 142 of the toothed plate 14 and the second blocking surface 242 of the toothed block 24 move towards each other, interfering with each other and thus preventing the pressure head 10 from rotating further. In this way, even if subjected to vibration or impact during transportation, the pressure head 10 is not easily accidentally unlocked.

[0068] Furthermore, in this embodiment, the reference surface gap H between the toothed plate 14 and the toothed block 24 is not less than the sum of the toothed plate thickness H1 and the toothed block thickness H2. This configuration ensures reliable meshing and smooth rotation between the toothed plate 14 and the toothed block 24.

[0069] Preferably, the number of toothed plates 14 on the pressure head 10 is two or more. In this case, the angular displacement between two adjacent toothed plates 14 can be appropriately selected such that when one toothed plate 14 contacts a toothed block 24 on the cylinder head 20, at least one of the remaining toothed plates will not contact any of the remaining toothed blocks. For example, the angular displacement between two adjacent toothed plates 14 can be set to be unequal to, and not an integer multiple of, the angular displacement between two adjacent toothed blocks 24 on the cylinder head 20. Furthermore, the angular range occupied by each toothed plate 14 is greater than the angular range occupied by each toothed block 24.

[0070] Alternatively, at least one of the toothed plates 14 or toothed blocks 24 may be distributed at irregular intervals, which may also increase the probability that at least one toothed plate 14 does not come into contact with any toothed block 24. For example, the angular displacement between a toothed plate 14 and its adjacent toothed plate on one side may be greater than the angular displacement between it and its adjacent toothed plate on the other side, and the difference between the two may be at least twice the angular range occupied by a single toothed block 24.

[0071] The arrangement of the toothed plate 14 and the toothed block 24 can also be interchanged. That is, the description of the toothed plate 14 applies to the toothed block 24, and the description of the toothed block 24 also applies to the toothed plate 14.

[0072] By arranging the toothed plates 14 and toothed blocks 24 in this way, it can be ensured that at least one toothed plate 14 will not yield or deform due to being pressed by the toothed blocks 24 for a long time, so as to ensure the blocking function of the toothed plate 14.

[0073] The second blocking surface 242 of the tooth block 24 can extend radially along the cylinder head 20, or it can form an angle of less than 90° with the radial direction of the cylinder head 20.

[0074] The second anti-opening mechanism will be explained next.

[0075] like Figure 3b , Figure 4a As shown, the second anti-opening mechanism includes: a first stop 27 disposed on the inner side of the outer ring 22 of the cylinder head 20; and a second stop 32 disposed on the outer side of the upper ring 31 of the cylinder head 30. The engagement direction of the first stop 27 and the second stop 32 is opposite to that of the first anti-opening mechanism, allowing the cylinder head 30 to rotate in the tightening direction while preventing it from rotating in the opening direction.

[0076] In this invention, the unlocking direction of the pressure head 10 is set to be the same as the tightening direction of the dental brace 30 when it is tightened to the opening of the container. This prevents the dental brace 30 from becoming loose when the pressure head 10 is unlocked.

[0077] Similarly to the description in the first opening mechanism, the structure and arrangement of the toothed plate 14 and toothed block 24 described above also apply to the first stop 27 and the second stop 32.

[0078] For example, such as Figure 6 As shown, the first stop 27 includes a third guide surface 271 and a third blocking surface 272. The third guide surface 271 extends from the inner surface of the outer ring 22 of the cylinder head 20 along the tightening direction of the threaded sleeve 30, and forms a certain angle with the tangent direction of the cylinder head 20. The third blocking surface 272 is disposed on the side of the first stop 27 opposite to the third guide surface 271. The angle between the third guide surface 271 and the tangent direction of the cylinder head 20 is smaller than the angle between the third blocking surface 272 and the tangent direction of the cylinder head 20.

[0079] Correspondingly, at least one second stop 32 is provided on the outer surface of the upper ring 31 of the braces 30. This second stop 32 also includes a fourth guide surface 321 and a fourth blocking surface 322. The fourth guide surface 321 of the second stop 32 extends from the outer surface of the upper ring 31 of the braces 30 along the opening direction of the braces 30 and forms an angle with the tangent direction of the braces 30. The fourth blocking surface 322 of the second stop 32 is located on the side of the second stop 32 opposite to the fourth guide surface 321. The angle between the fourth guide surface 321 and the tangent direction of the braces 30 is smaller than the angle between the fourth blocking surface 322 and the tangent direction of the braces 30.

[0080] Preferably, an anti-opening tooth 34 is also provided on the inner side of the lower ring 33 of the brace 30, and the anti-opening tooth 34 is provided in such a way that it extends obliquely from the inner side of the lower ring 33 of the brace 30. By providing the anti-opening tooth 34, the ability to prevent loosening between the brace and the container can be enhanced.

[0081] The embodiments and variations of this utility model have been described above. However, it should be understood that this disclosure is not limited to the above embodiments and structures. This disclosure also includes various variations and modifications within the same scope. In addition, various combinations and methods, and further combinations and methods containing only one element, or more or less thereof, also fall within the scope and concept of this disclosure.

Claims

1. A press pump, said press pump being mounted on the opening of a container, comprising: A pressure head having a nozzle for discharging liquid feed; Cylinder head, the cylinder head being used to seal the cylinder; Dental braces, which are attached to the opening of a container; The cylinder contains a one-way valve. A piston rod, one end of which is connected to a pressure head, and the other end of which is equipped with a piston that extends into the internal space of the cylinder. The cylinder head and the gear sleeve are fixedly connected to the cylinder. Its features are, A first anti-opening mechanism is provided between the pressure head and the cylinder head. A second anti-opening mechanism is provided between the cylinder head and the gear sleeve. The first anti-opening mechanism is configured to allow the pressure head to rotate in the locking direction while preventing it from rotating in the unlocking direction. The second anti-opening mechanism is configured to allow the dental brace to rotate in the tightening direction while preventing it from rotating in the opening direction.

2. The push pump as described in claim 1, characterized in that, The unlocking direction of the pressure head is set to be the same as the tightening direction of the dental brace.

3. The push pump as described in claim 1 or 2, characterized in that, The first anti-opening mechanism includes: At least one toothed plate, the toothed plate being disposed on either the pressure head or the cylinder head; and At least one toothed block, said toothed block being disposed on the other side of the pressure head and the cylinder head. The second anti-opening mechanism includes: At least one first stop block, wherein the first stop block is disposed on either the cylinder head or the gear sleeve; and At least one second stop block, the second stop block being disposed on the other side of the cylinder head and the gear sleeve.

4. The push pump as described in claim 3, characterized in that, At least one of the toothed plates is disposed on the inner ring of the pressure head. The toothed plate includes a first guide surface and a first blocking surface. The first guide surface extends from the inner surface of the sleeve of the pressure head along the unlocking direction of the pressure head. The first blocking surface is disposed on the side of the toothed plate opposite to the first guide surface. At least one of the toothed blocks is disposed on the outer surface of the cylinder head. The toothed block includes a second guide surface and a second blocking surface. The second guide surface extends from the outer surface of the cylinder head sleeve along the locking direction of the pressure head, and the second blocking surface is disposed on the side of the toothed block opposite to the second guide surface.

5. The push pump as described in claim 4, characterized in that, At least one of the first stops is disposed on the inner surface of the cylinder head. The first stop includes a third guide surface and a third blocking surface. The third guide surface extends from the inner surface of the outer ring of the cylinder head along the tightening direction of the threaded sleeve. The third blocking surface is disposed on the side of the first stop opposite to the third guide surface. At least one of the second stops is disposed on the outer surface of the dental brace. The second stop includes a fourth guide surface and a fourth blocking surface. The fourth guide surface extends from the outer surface of the upper ring of the braces along the opening direction of the braces. The fourth blocking surface of the second stop is disposed on the side of the second stop opposite to the fourth guide surface.

6. The push pump as described in claim 4, characterized in that, The gap between the reference surface of the toothed plate and the toothed block is greater than or equal to the sum of the thickness of the toothed plate and the thickness of the toothed block.

7. The push pump as described in claim 1, characterized in that, An anti-opening tooth is provided on the inner side of the braces, which is arranged to extend obliquely from the inner side of the lower ring of the braces.

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