A foam pump

Abstract

This utility model discloses a foam pump, including a pressing head, a connecting rod, an outer cover, and a pump body. The upper part of the connecting rod has an inner mounting groove, and the inner side of the pressing head has a pressing connection part inserted into the mounting groove. An anti-rotation fit structure is provided between the mounting groove and the pressing connection part. The pressing head, through the anti-rotation fit structure, causes the connecting rod to rotate synchronously with the pressing head in the unlocking direction or synchronously with the pressing head in the locking direction. The lower part of the connecting rod passes through the outer cover and connects to the output end of the pump body. The inner wall of the opening of the outer cover has a locking stop, a step, and an opening stop sequentially along the unlocking direction. The outer wall of the upper part of the connecting rod has a positioning part that abuts against the step. The anti-rotation fit structure is configured to allow the pressing head to rotate to any position relative to the connecting rod in the locking direction when the pressing head is in an unpressable state. This solves the problem of inconvenience in aligning the nozzle direction of the pressing head with the labeling position when the pressing head is in the locked state.

Description

Technical Field

[0001] This utility model relates to the field of cosmetics technology, and in particular to a foam pump. Background Technology

[0002] Currently, foam pumps with a press-lock function are typically used in the following way: rotating the press head 90 degrees clockwise locks it in a locked state, preventing it from being pressed down; rotating it 90 degrees counterclockwise opens it, allowing foam to be pumped out by pressing down on the press head.

[0003] However, in existing foam pumps with a press-lock function, the nozzle of the press head may align with the label position after the bottle is screwed on during filling. The usual method to solve this problem is to adjust the teeth or the thickness of the shim, which is inconvenient to operate. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model provides a foam pump to solve the problem of inconvenience in aligning the nozzle direction of the pressing head with the labeling position when the pressing head is locked.

[0005] This utility model is achieved using the following technical solution:

[0006] A foam pump, characterized in that it comprises a pressing head, a connecting rod, an outer cover, and a pump body. The upper portion of the connecting rod has an inner mounting groove, and the inner side of the pressing head has a pressing connection portion that mates with the mounting groove. The pressing connection portion is inserted into the mounting groove. An anti-rotation fit structure is provided between the mounting groove and the pressing connection portion. The pressing head, through the anti-rotation fit structure, causes the connecting rod to rotate synchronously with the pressing head in an unlocking direction or synchronously with the pressing head in a locking direction, wherein the unlocking and locking directions are opposite. The lower portion of the connecting rod passes through the outer cover and connects to the output end of the pump body. The inner wall of the outer cover opening is provided with a locking stop, a step, and an opening stop in sequence along the unlocking direction. The upper part of the outer wall of the connecting rod is provided with a positioning part that abuts against the step. When the pressing head rotates along the unlocking direction to make the positioning part abut against the opening stop, the pressing head is in a pressable state. When the pressing head rotates along the locking direction to make the positioning part abut against the locking stop, the pressing head is in a non-pressable state. The anti-rotation fit structure is also configured to allow the pressing head to rotate to any position relative to the connecting rod along the locking direction when the pressing head is in a non-pressable state.

[0007] Furthermore, the anti-rotation engagement structure comprises: an active anti-rotation tooth arranged on the outer wall of the pressing connection portion and a passive anti-rotation tooth arranged on the inner wall of the assembly groove, wherein the active anti-rotation tooth and the passive anti-rotation tooth mesh with each other for transmission.

[0008] Furthermore, the active anti-rotation teeth are provided in multiple quantities and are evenly arranged circumferentially along the outer wall of the pressing connection part, and the passive anti-rotation teeth are provided in multiple quantities and are evenly arranged circumferentially along the inner wall of the assembly groove. The gap between two adjacent passive anti-rotation teeth forms a meshing groove, and the active anti-rotation teeth and the meshing groove are engaged.

[0009] Furthermore, the ratio of the number of active anti-rotation teeth to the number of passive anti-rotation teeth is 1:2.

[0010] Furthermore, the active anti-rotation tooth includes a first end and a second end, the second end extending obliquely away from the first end in a direction away from the pressing connection portion, and the second end has an arc surface.

[0011] Furthermore, the passive anti-rotation tooth extends obliquely toward the locking direction, and the oblique extension direction of the active anti-rotation tooth is opposite to the oblique extension direction of the passive anti-rotation tooth.

[0012] Furthermore, the inner wall of the outer cover opening is also provided with a stop rib. The length of the stop rib extending in the radial direction is less than the length of the locking stop portion extending in the radial direction. The stop rib and the locking stop portion are spaced apart and form a locking groove between them. When the pressing head is in an unpressable state, the positioning part of the connecting rod is in the locking groove.

[0013] Furthermore, the outer wall of the stop rib is formed by an outgoing arc surface and an outgoing inclined surface that connects with the outgoing arc surface, and the outgoing inclined surface extends obliquely towards the unlocking direction.

[0014] Furthermore, the outer surface of the pressing head is provided with an unlocking mark for indicating the unlocking direction.

[0015] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0016] This utility model uses an anti-rotation mechanism to enable the pressing head to drive the connecting rod to rotate synchronously. With the design of the locking and opening positions of the outer cover, it provides a positioning function that indicates the end point of the pressing head rotation. At the same time, through the cooperation of the positioning and locking positions of the connecting rod, when the pressing head is in an unpressable state, the pressing head can be manually turned in the locking direction to adjust the direction of the pressing head nozzle so that the nozzle of the pressing head is aligned with the label position. Attached Figure Description

[0017] Figure 1 This is one of the cross-sectional views of the foam pump according to an embodiment of the present utility model;

[0018] Figure 2 This is a second cross-sectional view of the foam pump according to an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the pressing head according to an embodiment of the present utility model;

[0020] Figure 4 This is one of the cross-sectional views of the pressing head according to an embodiment of the present utility model;

[0021] Figure 5 This is a second cross-sectional view of the pressing head according to an embodiment of this utility model;

[0022] Figure 6 This is a schematic diagram of the connecting rod according to an embodiment of the present utility model;

[0023] Figure 7 This is one of the cross-sectional views of the connecting rod in an embodiment of this utility model;

[0024] Figure 8 This is a second sectional view of the connecting rod according to an embodiment of the present utility model;

[0025] Figure 9 This is a schematic diagram of the outer cover of an embodiment of the present utility model;

[0026] Figure 10 This is a cross-sectional view of the outer cover of an embodiment of this utility model;

[0027] In the diagram: 1. Pressing head; 11. Pressing connection; 110. Active anti-rotation tooth; 12. Unlocking mark; 2. Connecting rod; 21. Assembly groove; 210. Passive anti-rotation tooth; 22. Positioning part; 3. Outer cover; 31. Locking stop part; 32. Step part; 33. Opening stop part; 34. Stop rib; 341. Outlet arc surface; 342. Outlet inclined surface; 35. Locking groove; 4. Pump body. Detailed Implementation

[0028] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0029] The terms used to describe position and direction in this utility model are illustrated with the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this utility model.

[0030] like Figures 1 to 10As shown, this utility model provides a foam pump, including a pressing head 1, a connecting rod 2, an outer cover 3, and a pump body 4. The upper inner side of the connecting rod 2 is provided with an assembly groove 21. The inner side of the pressing head 1 is provided with a pressing connection part 11 that mates with the assembly groove 21. The pressing connection part 11 is inserted into the assembly groove 21. An anti-rotation fit structure is provided between the assembly groove 21 and the pressing connection part 11. The pressing head 1, through the anti-rotation fit structure, causes the connecting rod 2 to rotate synchronously with the pressing head 1 in the unlocking direction or synchronously with the pressing head 1 in the locking direction. The unlocking and locking directions are opposite. The lower part of the connecting rod 2 passes through the outer cover 3 and connects to the output of the pump body 4. The outer cover 3 has an inner wall at the opening that is sequentially provided with a locking stop 31, a step 32, and an opening stop 33 along the unlocking direction. The upper part of the outer wall of the connecting rod 2 has a positioning part 22 that abuts against the step 32. When the pressing head 1 rotates along the unlocking direction until the positioning part 22 abuts against the opening stop 33, the pressing head 1 is in a pressable state. When the pressing head 1 rotates along the locking direction until the positioning part 22 abuts against the locking stop 31, the pressing head 1 is in a non-pressable state. The anti-rotation fit structure is also configured to allow the pressing head 1 to rotate relative to the connecting rod 2 to any position along the locking direction when the pressing head 1 is in a non-pressable state.

[0031] In this embodiment, the pressing head 1 and the connecting rod 2 are connected by an anti-rotation fitting structure, allowing the connecting rod 2 to rotate synchronously with the pressing head 1. The connecting rod 2 achieves the switching between the pressable and non-pressable states of the pressing head 1 by cooperating with the locking stop 31 and the opening stop 33 of the outer cover 3 through the positioning part 22. When the pressing head 1 rotates in the unlocking direction, the anti-rotation fitting structure drives the connecting rod 2 to rotate synchronously with the pressing head 1. When the positioning part 22 of the connecting rod 2 rotates to abut against the opening stop 33, the pressing head 1 is in the pressable state, meaning that foam can be pumped out by pressing down the pressing head 1. When the pressing head 1 rotates in the locking direction, the pressing head 1 is in the non-pressable state. The pressing head 1 drives the connecting rod 2 to rotate synchronously. When the positioning part 22 of the connecting rod 2 rotates to abut against the locking stop part 31, the pressing head 1 is in an unpressable state, that is, it cannot be pressed down. When the pressing head 1 is in an unpressable state, the pressing head 1 is rotated along the locking direction. Since the positioning part 22 of the connecting rod 2 is blocked by the locking stop part 31, the connecting rod 2 does not rotate synchronously with the pressing head 1. When the force applied to the pressing head 1 is greater than the frictional force of the anti-rotation fit structure, the pressing head 1 can rotate relative to the connecting rod 2 at any angle. In this way, the pressing head 1 can be manually turned even when it is in an unpressable state so that the nozzle of the pressing head 1 is aligned with the labeling position.

[0032] This utility model achieves synchronous rotation of the pressing head 1 and the connecting rod 2 through an anti-rotation cooperation structure. With the design of the locking stop part 31 and the opening stop part 33 of the outer cover 3, it realizes the positioning function of indicating the end point of the rotation of the pressing head 1. At the same time, through the cooperation of the positioning part 22 and the locking stop part 31 of the connecting rod 2, when the pressing head 1 is in an unpressable state, the pressing head 1 can be manually turned in the locking direction to adjust the direction of the nozzle of the pressing head 1 so that the nozzle of the pressing head 1 is aligned with the label position.

[0033] As a preferred embodiment, the anti-rotation engagement structure consists of an active anti-rotation tooth 110 arranged on the outer wall of the pressing connection part 11 and a passive anti-rotation tooth 210 arranged on the inner wall of the assembly groove 21, wherein the active anti-rotation tooth 110 and the passive anti-rotation tooth 210 mesh with each other for transmission.

[0034] In this embodiment, the connecting rod 2 rotates synchronously with the pressing head 1 by means of mutual meshing and transmission between the active anti-rotation tooth 110 and the passive anti-rotation tooth 210, which has the characteristics of simple structure and convenient operation.

[0035] Specifically, the active anti-rotation teeth 110 are provided in multiple quantities and are evenly arranged along the outer circumference of the pressing connection part 11, and the passive anti-rotation teeth 210 are provided in multiple quantities and are evenly arranged along the inner circumference of the assembly groove 21. The gap between two adjacent passive anti-rotation teeth 210 forms a meshing groove, and the active anti-rotation teeth 110 and the meshing groove are engaged.

[0036] More specifically, the ratio of the number of active anti-rotation teeth 110 to the number of passive anti-rotation teeth 210 is 1:2.

[0037] In a preferred embodiment, the active anti-rotation tooth 110 includes a first end and a second end, the second end extending obliquely away from the first end in a direction away from the pressing connection portion 11, and the second end having an arc surface.

[0038] In this embodiment, the shape of the passive anti-rotation tooth 210 is the same as that of the active anti-rotation tooth 110. This reduces the friction between the active anti-rotation tooth 110 and the passive anti-rotation tooth 210 at the second end of the arc surface, thereby reducing wear and increasing the service life of the pressing head 1.

[0039] In a preferred embodiment, the passive anti-rotation tooth 210 extends obliquely toward the locking direction, and the oblique extension direction of the active anti-rotation tooth 110 is opposite to that of the passive anti-rotation tooth 210. This better achieves the anti-rotation and locking functions.

[0040] In a preferred embodiment, the inner wall of the opening of the outer cover 3 is also provided with a stop rib 34. The length of the stop rib 34 extending in the radial direction is less than the length of the locking stop part 31 extending in the radial direction to form an outlet notch. The stop rib 34 and the locking stop part 31 are spaced apart and a locking groove 35 is formed between them. When the pressing head 1 is in an unpressable state, the positioning part 22 of the connecting rod 2 is in the locking groove 35.

[0041] In this embodiment, by setting a stop rib 34, the pressing head 1 is prevented from being easily unlocked by accident. Specifically, when the pressing head 1 needs to be unlocked, the pressing head 1 is rotated in the unlocking direction. As long as the applied force can make the positioning part 22 of the connecting rod 2 pass over the stop rib 34, the pressing head 1 can be unlocked (that is, the foam can be pumped out by pressing the pressing head 1).

[0042] In a preferred embodiment, the outer wall of the stop rib 34 is formed by an outgoing arc surface 341 and an outgoing inclined surface 342 that connects to the outgoing arc surface 341. The outgoing inclined surface 342 extends obliquely in the unlocking direction. The design of the outgoing arc surface 341 facilitates the sliding of the guide positioning part 22 out of the outgoing notch, and the outgoing inclined surface 342 allows the guide positioning part 22 to rotate along the unlocking direction.

[0043] In a preferred embodiment, the outer surface of the pressing head 1 is provided with an unlocking mark 12 for indicating the unlocking direction. This makes it convenient for operators to unlock the pressing head 1 by referring to the unlocking mark 12, thus improving the user experience.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A foam pump, characterized in that, The device includes a pressing head (1), a connecting rod (2), an outer cover (3), and a pump body (4). The upper part of the connecting rod (2) has an inner mounting groove (21). The inner side of the pressing head (1) has a pressing connection part (11) that mates with the mounting groove (21). The pressing connection part (11) is inserted into the mounting groove (21). An anti-rotation fit structure is provided between the mounting groove (21) and the pressing connection part (11). The pressing head (1) causes the connecting rod (2) to rotate synchronously with the pressing head (1) in the unlocking direction or synchronously with the pressing head (1) in the locking direction through the anti-rotation fit structure. The unlocking and locking directions are opposite. The lower part of the connecting rod (2) passes through the outer cover (3) and connects to the output end of the pump body (4). The inner wall of the opening of the outer cover (3) is provided with a locking stop (31), a step (32) and an opening stop (33) in sequence along the unlocking direction. The upper part of the outer wall of the connecting rod (2) is provided with a positioning part (22) that abuts against the step (32). When the pressing head (1) rotates along the unlocking direction to make the positioning part (22) abut against the opening stop (33), the pressing head (1) is in a pressable state. When the pressing head (1) rotates along the locking direction to make the positioning part (22) abut against the locking stop (31), the pressing head (1) is in a non-pressable state. The anti-rotation fit structure is also configured to allow the pressing head (1) to rotate relative to the connecting rod (2) to any position along the locking direction when the pressing head (1) is in a non-pressable state.

2. The foam pump according to claim 1, characterized in that, The anti-rotation fit structure consists of an active anti-rotation tooth (110) arranged on the outer wall of the pressing connection part (11) and a passive anti-rotation tooth (210) arranged on the inner wall of the assembly groove (21), wherein the active anti-rotation tooth (110) and the passive anti-rotation tooth (210) mesh with each other for transmission.

3. The foam pump according to claim 2, characterized in that, The active anti-rotation teeth (110) are provided in multiple ways and are evenly arranged along the outer wall of the pressing connection part (11). The passive anti-rotation teeth (210) are provided in multiple ways and are evenly arranged along the inner wall of the assembly groove (21). The gap between two adjacent passive anti-rotation teeth (210) forms a meshing groove. The active anti-rotation teeth (110) and the meshing groove are engaged.

4. The foam pump according to claim 3, characterized in that, The ratio of the number of active anti-rotation teeth (110) to the number of passive anti-rotation teeth (210) is 1:

2.

5. The foam pump according to claim 2, characterized in that, The active anti-rotation tooth (110) includes a first end and a second end, the second end extending obliquely away from the first end in a direction away from the pressing connection (11), and the second end has an arc surface.

6. The foam pump according to claim 2, characterized in that, The passive anti-rotation tooth (210) extends obliquely in the locking direction, and the oblique extension direction of the active anti-rotation tooth (110) is opposite to the oblique extension direction of the passive anti-rotation tooth (210).

7. The foam pump according to claim 1, characterized in that, The inner wall of the opening of the outer cover (3) is also provided with a stop rib (34). The length of the stop rib (34) extending in the radial direction is less than the length of the locking stop part (31) extending in the radial direction. The stop rib (34) and the locking stop part (31) are spaced apart and form a locking groove (35) between them. When the pressing head (1) is in an unpressable state, the positioning part (22) of the connecting rod (2) is in the locking groove (35).

8. The foam pump according to claim 7, characterized in that, The outer wall of the stop rib (34) is formed by an outgoing arc surface (341) and an outgoing inclined surface (342) connected to the outgoing arc surface (341), the outgoing inclined surface (342) extending obliquely in the unlocking direction.

9. The foam pump according to claim 1, characterized in that, The outer surface of the pressing head (1) is provided with an unlocking mark (12) for indicating the unlocking direction.

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