Patent ID: 12240006

Reference numerals are as follows:10: outer cover;11: accessory cavity;12: conveying hole;13: check cavity;14: guide hole;15: hole wall of guide hole;20: plastic spring;21: supporting rod;22: baffle;23: pressing groove;241: narrow tube section;242: wide tube section;243: buffer tube section;25: convex ring;26: reinforcing rib;27: guide wall;28a: inner wall;28b: port;29a: respective ends of supporting rods;29b: end face of plastic spring;30: inner cover;31: stop tube;32: hollow groove;33: port of stop tube;40: pressing head;41: discharging hole;42: pressing sheet;43: conveying pipe;50: plastic bottle body;60: check valve;61: guide column;62: sealing cover.

DETAILED DESCRIPTION OF THE INVENTION

The following clearly and completely describes the technical solutions in the implementations of the disclosure with reference to the accompanying drawings in the implementations of the disclosure.

A first embodiment of an all-plastic pump is shown inFIGS.1-4, and includes an outer cover10, a plastic spring20, an inner cover30and a pressing head40. An accessory cavity11is defined by the outer cover10, and a conveying hole12is formed inside the accessory cavity11. The plastic spring20is disposed in the accessory cavity11, and the plastic spring20is in a tubular shape. The plastic spring20surrounds the conveying hole12. A plurality of supporting rods21are circumferentially disposed on an inner wall28bof a port28a, away from the conveying hole12, of the plastic spring20, and respective ends29aof supporting rods21, close to the conveying hole12, of the plurality of supporting rods21are connected to a baffle22. The inner cover30is disposed in the accessory cavity11, and the inner cover30surrounds the plastic spring20. A stop tube31is disposed inside the inner cover30, the stop tube31penetrates into a space defined by the plurality of supporting rods21, and a port33of the stop tube31is in sealing abutting connection with the baffle22. The pressing head40is installed in the accessory cavity11in a pressable manner, and a discharging hole41is formed outside the pressing head40. A pressing sheet42and a conveying tube43are disposed inside the pressing head40. The pressing sheet42surrounds the conveying tube43, and the pressing sheet42is opposite to an end face29bof the plastic spring20. The conveying tube43is inserted into the stop tube31, and the conveying tube43is in connection and communication with the discharging hole41. Pressing of the pressing head40is configured to push the pressing sheet42to urge the plastic spring20so as to separate the baffle22and the stop tube31from each other.

In the application, a lower end of the outer cover10is configured to be connected and fixed to a plastic bottle body50. For example, the two may be in threaded connection, and after the two are fixed, the all-plastic pump can extract contents from the plastic bottle body50through the conveying hole12for discharge.

When the pressing head40is not pressed, the plastic spring20is in a stretching state, and a lower port33of the stop tube31and the baffle22are attached to each other, so that the contents are prevented from flowing out, and a check effect is realized. When the pressing head40is pressed, the pressing sheet42applies a downward pushing force to an end face29bof the plastic spring20, the plastic spring20is in a contracted state, so that the baffle22moves downwards, the baffle22and the stop tube31are separated from each other, and the contents can flow into the stop tube31through a space formed after separation of the baffle22and the stop tube31, thereby flowing through the conveying pipe43and the discharging hole41to be output.

In summary, according to the embodiment, after a metal spring is replaced with the plastic spring20, a pump head can still be opened and closed, meanwhile, a high-efficiency check effect is realized, and the problem that an existing pump head is inconvenient to directly recycle is practically solved.

In order to separate the baffle22from the stop tube31, it should be ensured that the baffle22has an enough moving space, for example, an enough space may be disposed on the outer cover10for the baffle22to move. But in order to improve the structural compactness of a product, as shown inFIG.1, in this embodiment, a length of the plurality of support rods21is set to be smaller than a length of the plastic spring20so as to move the baffle22inside the plastic spring20through compression of the plastic spring20, so that at the moment, a moving space for the baffle22is reserved inside the plastic spring20, space occupation in the outer cover10is avoided, and the structure of the product can be reduced.

In addition, in order to ensure that the pressing sheet42can accurately press the plastic spring20, as shown inFIGS.1-3, in this embodiment, a portion, opposite to the pressing sheet42, of the inner cover30is provided with a hollow groove32. A portion, opposite to the hollow groove32, of an end face29bof the plastic spring20is provided with a pressing groove23, and the pressing sheet42penetrates through the hollow groove32and is embedded into the pressing groove23.

For example, the number of the pressing sheets42in this embodiment is two, and the pressing sheet42is in an arc shape, the hollow groove32and the pressing groove23are also in an arc shape. After the pressing sheet42penetrates through the hollow groove32and is inserted into the pressing groove23, accurate alignment of the pressing sheet42and the plastic spring20will be realized, and it is ensured that the pressing sheet42can directly press the plastic spring20. A second embodiment of an all-plastic pump is shown inFIG.5, which is basically the same as the first embodiment of the all-plastic pump. The difference is that the plastic spring20includes a narrow tube section241and a wide tube section242connected to each other, a baffle22and a plurality of supporting rods21are disposed in the narrow tube section241, and the wide tube section242surrounds a conveying hole12.

After the disposing way is adopted, as a tube diameter of the narrow tube section241is small, elastic deformation resilience is high, so that the deformation resilience of the plastic spring20is ensured. While a tube diameter of the wide tube section242is large, it is ensured that contents have an enough storage space, providing an important guarantee for smooth extraction of the contents.

Moreover, in order to realize a deformation recovery function of the narrow tube section241, in this embodiment, a plurality of circles of convex rings25separately arranged are disposed on an outer surface of the narrow tube section241, and circumferentially surrounds an outer wall of the narrow tube section241. Due to the fact that a thickness of a corresponding position of the narrow tube section241is increased by the convex ring25, a deformation area of the narrow tube section241is limited between adjacent convex rings25. Therefore, the narrow tube section241has a telescopic function as a spring.

A third embodiment of an all-plastic pump is shown inFIG.6, which is basically the same as the second embodiment of the all-plastic pump. The difference is that the plastic spring20further includes a buffer tube section243, and a tube diameter of the buffer tube section243is larger than a tube diameter of the narrow tube section241, and is smaller than a tube diameter of the wide tube section242.

At the moment, a big-end-down cover-shaped structure is defined by the buffer tube section243, so that direct transition between the narrow tube section241and the wide tube section242is avoided, contraction performance of the narrow tube section241is linearly changed, stretching and contraction smoothness of the plastic spring20is improved, and a better user experience is provided for a user.

A fourth embodiment of an all-plastic pump is shown inFIGS.7-9, which is basically the same as the third embodiment of the all-plastic pump. The difference is that a joint of the buffer tube section243and the wide tube section242is provided with a plurality of reinforcing ribs26, and both the buffer tube section243and the wide tube section242are connected to the reinforcing ribs26.

At the moment, the plurality of reinforcing ribs26are circumferentially arranged in a circle at intervals in a separated manner. An inner side face of the reinforcing rib26is connected and fixed to an outer side face of the buffer tube section243. A bottom face of the reinforcing rib26is connected and fixed to an outer top of the wide tube section242. Not only is the connection strength of the buffer tube section243and the wide tube section242enhanced, but also appearance stability of the buffer tube section243and the wide tube section242is maintained, so as to ensure that an enough temporary storage space can be provided for contents.

Moreover, at the moment, in order to improve compression stability of the plastic spring20, as shown inFIGS.7-9, a circle of guide wall27is disposed on the inner wall28bof the port28a, away from the conveying hole12, of the plastic spring20, and the guide wall27surrounds the stop tube31and is connected and fixed to the plurality of supporting rods21.

The guide wall27extends inwards from the port of the plastic spring20, so that a thickness of the port of the plastic spring20is increased, that is, the plastic spring20and the stop tube31are connected more tightly. Not only can sealing performance be improved, but also smoothness of relative movement of the plastic spring20and the stop tube31is better optimized.

A fifth embodiment of an all-plastic pump is shown inFIGS.10-11, which is basically the same as the fourth embodiment of the all-plastic pump. The difference is that a check cavity13is disposed in a side, facing away from the accessory cavity11, of the outer cover10. A check valve60is disposed in the check cavity13, and the check cavity13and the accessory cavity11are in communication through the conveying hole12. The check valve60is configured to achieve one-way communication in the direction from the check cavity13to the accessory cavity11.

That is, this embodiment adds a second defense line for the all-plastic pump. In application, the contents in the plastic bottle body50can flow through the check valve60and then enters the plastic spring20. But contents in the plastic spring20cannot pass through the check valve60. Therefore, one-way communication of the check valve60is realized.

Specifically, in this embodiment, a guide hole14is formed inside the check cavity13, and the check valve60includes a guide column61and an arc-cover-shaped sealing cover62connected to each other. The guide column61is inserted into the guide hole14, and a gap is reserved between the guide column61and a hole wall15of the guide hole14. The sealing cover62blocks communication between the conveying hole12and the guide hole14, and the sealing cover62can deform under the action of external force, so that the conveying hole12is in communication with the guide hole14.

For example, when a user presses the pressing head40, contents will flow to the check valve60. But the contents cannot flow back into the plastic bottle body50by being blocked by the sealing cover62. When the pressing head40is reset, negative pressure will be formed, so that the check valve60moves upwards, blockage of the check valve60to the plastic bottle body50is relieved, and the contents in the plastic bottle body50can be extracted into the plastic spring20, thereby being conveyed.

The above mentioned are preferred implementations of the disclosure. It should be noted that several improvements and refinements may be made by those of ordinary skill in the art without departing from the principles of the disclosure, and these improvements and refinements are also to be considered within the scope of the disclosure.