Emulsion pump body with liquid back-suction function

Abstract

The utility model relates to a kind of emulsion pumps, specifically a kind of emulsion pump body with liquid back suction function, including screw thread cover, pressing head, pump body, limit sleeve and main column, the main column is passed through the limit sleeve and extends into pump body, and is connected with the elastic member installed in the limit sleeve, one end of the main column connects the pressing head, further include: piston, sealing sliding in pump body, another end of the main column is inserted in the through slot formed on the piston;Conducting control piece, one end is inserted into the main column from the through slot of the piston side away from the main column, when the conducting control piece and the piston are in the state of disengaging abutment, the other end is matched with valve ball;Second limiting part is further provided on the inner wall of the pump body.In pressing process, liquid is smoothly extruded and sent, meet use demand, and after releasing pressing head, liquid back suction is realized by negative pressure principle again, avoid liquid drip and waste.

Description

Technical Field

[0001] This utility model relates to an emulsion pump, specifically an emulsion pump body with liquid back suction function. Background Technology

[0002] A lotion pump is a tool used in cosmetic containers to dispense the contents. It is a liquid dispenser that uses the principle of atmospheric balance to pump out the liquid from the bottle by pressing, while replenishing the bottle with outside air.

[0003] A typical emulsion pump usually consists of accessories such as a pump head, main column, auxiliary column, gasket, locking cap, pump plug, spring, pump body, glass bulb, and suction tube.

[0004] Chinese patent application CN106829177B discloses a back-suction emulsion pump, comprising a pump head, a body, and a suction tube connected to each other. The body contains an output tube, a piston, and an elastic limiting mechanism. One end of the output tube is connected to the pump head, and the other end is sleeved with the piston, moving up and down within the body under the action of the elastic limiting mechanism. The piston has a collar that sleeves with the opening of the output tube. The opening of the output tube is a convex tube with a diameter smaller than that of the output tube, forming a back-suction cavity between the outer edge of the convex tube and the inner wall of the collar. The pump also includes a valve that cooperates with the piston to open or close the tube opening. When the pump head presses down on the output tube, it pushes the piston downward, opening the valve. When the output tube rises, the valve closes the output tube opening and drives the piston back up, opening the back-suction cavity to collect the back-suctioned emulsion. The emulsion pump disclosed above allows residual emulsion in the pump head to be back-suctioned and collected in the back-suction cavity, solving the problem of waste or contamination caused by residual emulsion in the pump head after dispensing from traditional emulsion pumps.

[0005] However, its back suction space is formed by the gap between the piston and the output pipe. The space is relatively small, and the back suction liquid is not easy to squeeze out when it is squeezed out of the back suction space, and a lot of residue is easily generated, especially in the gap between the output pipe and the piston. Utility Model Content

[0006] The purpose of this invention is to provide an emulsion pump body with liquid back suction function to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a liquid back-suction emulsion pump body, comprising a threaded cap, a pressing head, a pump body, a limiting sleeve, and a main column. The main column penetrates the limiting sleeve and extends into the pump body, and is connected to an elastic element installed within the limiting sleeve. One end of the main column is connected to the pressing head. The pump body also includes a piston, which slides and seals within the pump body. The other end of the main column is inserted into a groove formed on the piston. The frictional force between the main column and the piston is greater than the frictional force between the piston and the pump body. The control element has one end extending through a slot from the side of the piston away from the main column and inserted into the main column. When the control element is disengaged from the piston, the inner side of the main column is in a conductive state with the inner side of the pump body. The other end cooperates with the valve ball, which is used to make the pump body conductive at the valve ball after the piston moves upward a certain distance from the bottom of the pump body. The inner wall of the pump body is also provided with a second limiting part, which is used to make the main column move axially relative to the piston after the piston moves upward a certain distance from the bottom of the pump body, thereby causing the control element to abut against the piston.

[0008] As described above, the emulsion pump body with liquid back suction function includes: a secondary column, which passes through a through groove from the side of the piston away from the main column and is inserted into the main column, and a liquid guide position is formed on the secondary column. When the secondary column is disengaged from the piston, the liquid guide position is in a conductive state; and an elastically deformable valve plug, which is installed on the secondary column. When the pressing head is pressed down to the end of the stroke, the valve plug abuts against the valve ball and is in a deformed state.

[0009] As described above, the emulsion pump body with liquid back suction function includes: the secondary column includes: a sealing platform and an insertion platform, the insertion platform is inserted into the main column, and the liquid guiding channel provided on the insertion platform along the length direction forms the liquid guiding position; the insertion platform also has an embedded groove, and the inner protrusion on the inner side of the main column is placed in the embedded groove.

[0010] As described above, the emulsion pump body with liquid back suction function has the following characteristics: the diameter of the sealing platform is larger than the diameter of the insertion platform and larger than the diameter of the through groove, so that the connection between the sealing platform and the insertion platform forms a sealing position, which is used to block the liquid guiding channel when the sealing platform abuts against the piston.

[0011] As described above, the emulsion pump body with liquid back suction function has a connector formed at one end of the main column facing the piston. The connector is inserted into the through groove and is interference-fitted with the piston.

[0012] As described above, the emulsion pump body with liquid back suction function has a boss formed at the connection position between the plug and the main column, and the outer diameter of the boss is larger than the inner diameter of the through groove.

[0013] A first limiting part and a limiting protrusion are formed on the inner side of the pump body at the end of the piston's upper and lower strokes, respectively; the pushing force required for the piston to disengage downward from the first limiting part is greater than the frictional force between the main column and the piston; when the piston moves down to abut against the limiting protrusion, the piston is restricted from moving downward.

[0014] As described above, the emulsion pump body with liquid back suction function has a valve cavity formed on the inner side of the pump body for placing the valve ball, so that the pump body forms a one-way conduction position at the valve cavity.

[0015] As described above, the emulsion pump body with liquid back suction function has a cylindrical groove formed on the outer side of the main column placed inside the limiting sleeve. The elastic element is placed in the cylindrical groove and the two ends of the elastic element abut against the inner end of the cylindrical groove and the inner end of the limiting sleeve, respectively.

[0016] As described above, the emulsion pump body with liquid back suction function has internal threads formed on the inner wall of the limiting sleeve, and external threads that mate with the internal threads are formed on the main column.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: through the coordinated action of the main column, the conduction control component, the piston and the second limiting part, smooth operation of pressing and suction is achieved. During the pressing process, the liquid is smoothly squeezed out to meet the usage requirements. After the pressing head is released, the negative pressure generated between the piston movement and the pump body allows the liquid to return to the pump body, realizing liquid suction and avoiding liquid leakage and waste, thus ensuring the stability and efficiency of the entire squeezing and suction process. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of an emulsion pump with liquid back suction function; Figure 2 A top view of an emulsion pump with liquid back suction function; Figure 3 for Figure 2 Cross-sectional view along the AA direction; Figure 4 for Figure 2 Cross-sectional view along the BB direction; Figure 5 An exploded view of the main column and conduction control components in an emulsion pump with liquid back suction function; Figure 6 A cross-sectional view of the pump body in an emulsion pump with liquid back suction function; Figure 7 This is a schematic diagram of the structure of an emulsion pump with liquid back suction function under different conditions.

[0019] In the diagram: 1. Threaded cap; 2. Press head; 3. Pump body; 301. First limiting part; 302. Second limiting part; 303. Valve cavity; 304. Limiting protrusion; 4. Limiting cover; 5. Limiting sleeve; 501. Internal thread; 6. Main column; 601. Cylindrical groove; 602. External thread; 603. Boss; 604. Connector; 605. Internal protrusion; 7. Spring; 8. Piston; 9. Secondary column; 901. Embedded groove; 902. Liquid guiding channel; 903. Sealing platform; 904. Insertion platform; 10. Valve plug; 11. Valve ball. Detailed Implementation

[0020] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0021] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0022] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0023] Please see Figures 1-7 In this embodiment of the present invention, an emulsion pump body with liquid back suction function includes a threaded cap 1, a pressing head 2, a pump body 3, a limiting sleeve 5, and a main column 6. The main column 6 passes through the limiting sleeve 5 and extends into the pump body 3, and is connected to an elastic element installed in the limiting sleeve 5. One end of the main column 6 is connected to the pressing head 2. The limiting sleeve 5 is inserted into the pump body 3 and is locked in place with the pump body 3. The threaded cap 1 is sleeved on the outside of the pump body 3 and is used to connect with the bottle body by threads to press the pump body 3 onto the bottle body and keep the bottle body in a sealed state.

[0024] It also includes: a piston 8, which slides and seals within the pump body 3; the other end of the main column 6 is inserted into a through groove formed on the piston 8; the friction between the main column 6 and the piston 8 is greater than the friction between the piston 8 and the pump body 3; a conduction control element, one end of which passes through the through groove from the side of the piston 8 away from the main column 6 and is inserted into the main column 6; when the conduction control element is disengaged from the piston 8, the inner side of the main column 6 is in a conducting state with the inner side of the pump body 3; the other end of which cooperates with the valve ball 11, and is used to make the pump body 3 conduct at the valve ball 11 after the piston 8 moves upward a certain distance from the bottom of the inner side of the pump body 3; a second limiting part 302 is also provided on the inner wall of the pump body 3, which is used to make the main column 6 move axially relative to the piston 8 after the piston 8 moves upward a certain distance from the bottom of the inner side of the pump body 3, and drive the conduction control element to abut against the piston 8.

[0025] In this embodiment, pressing the pressing head 2 causes the main column 6 to move downwards, which in turn activates the control element and causes the piston 8 to move downwards. When the piston 8 moves downwards, due to the setting of the valve ball 11, the liquid in the bottle will not enter the pump body 3. The liquid enters the main column 6 and is discharged through the pressing head 2 to achieve extrusion. When the piston 8 moves to the bottom of the pump body 3, the inner side of the main column 6 and the inner side of the pump body 3 are still in a conductive state. When the pressing head 2 is released, the pressing head 2 and the main column 6 move upwards under the action of the elastic element. Since the frictional force between the main column 6 and the piston 8 is greater than the frictional force between the piston 8 and the pump body 3, the main column 6 first drives the piston 8 to move upwards a certain distance. At this time, the valve ball 11 is still in a blocked state, which makes the space inside the pump body 3 below the piston 8 larger, generating negative pressure to achieve the back suction of liquid. When the piston 8 moves to the second limit part 302, the piston 8 is subject to certain resistance. At this time, the piston 8 stops moving, the main column 6 continues to move upward and drives the conduction control component to move upward. After the conduction control component moves upward and abuts against the piston 8, the inner side of the main column 6 and the inner side of the pump body 3 are still in a blocked state. Then the main column 6 continues to move to drive the piston 8 to move upward past the second limit part 302, and finally reaches the end of the stroke of the piston 8 relative to the upper end of the inner side of the pump body 3 (the position of the piston 8 after the pressing head 2 stops moving upward).

[0026] In summary, this embodiment achieves smooth operation of pressing and suction through the coordinated action of the main column 6, the conduction control component, the piston 8, and the second limiting part 302. During the pressing process, the liquid is smoothly squeezed out to meet the usage requirements. After the pressing head 2 is released, the piston 8 moves and generates negative pressure between itself and the pump body 3, allowing the liquid to return to the pump body 3, achieving liquid suction. The suction volume is relatively large, avoiding liquid leakage and waste, and ensuring the stability and efficiency of the entire squeezing and suction process.

[0027] Further, please refer to Figures 3-5The conduction control component includes: a secondary column 9, which passes through a through groove from the side of the piston 8 away from the main column 6 and is inserted into the main column 6. A liquid guide level is formed on the secondary column 9. When the secondary column 9 is disengaged from the piston 8, the liquid guide level is in a conducting state; and an elastically deformable valve plug 10, which is installed on the secondary column 9. When the pressing head 2 is pressed down to the end of its stroke, the valve plug 10 abuts against the valve ball 11 and is in a deformed state, so that when the main column 6 drives the secondary column 9 to move upward, the valve plug 10 will restore its deformation, but still exert a downward force on the valve ball 11.

[0028] The auxiliary column 9 includes a sealing platform 903 and an insertion platform 904. The insertion platform 904 is inserted into the main column 6. A liquid guiding channel 902 is provided on the insertion platform 904 along its length to form the liquid guiding position. An embedded groove 901 is also formed on the insertion platform 904. An inner protrusion 605 on the inner side of the main column 6 is placed in the embedded groove 901 to realize the snap-fit ​​between the insertion platform 904 and the main column 6. Preferably, the axial length of the embedded groove 901 is slightly greater than the axial length of the inner protrusion 605, thereby providing a certain assembly gap.

[0029] When the insertion platform 904 is inserted into the main column 6, the movement of the main column 6 can drive the auxiliary column 9 and the valve plug 10 to move synchronously. It should also be noted that when the insertion platform 904 is inserted into the main column 6, the main column 6 can drive the auxiliary column 9 and the valve plug 10 to undergo a certain length of axial displacement relative to the piston 8. This allows the sealing platform 903 to disengage from the piston 8, and the liquid guiding channel 902 to connect the inner side of the pump body 3 with the inner side of the main column 6, thereby opening the liquid guiding position. When the sealing platform 903 abuts against the piston 8, the liquid guiding channel 902 is submerged in the through groove of the piston 8, thereby sealing the liquid guiding position.

[0030] In detail, the diameter of the sealing platform 903 is larger than the diameter of the insertion platform 904 and larger than the diameter of the through groove, so that the connection between the sealing platform 903 and the insertion platform 904 forms a sealing position, which is used to block the liquid guiding channel 902 when the sealing platform 903 abuts against the piston 8.

[0031] Further, please refer to Figures 3-5 The main column 6 has a connector 604 at one end facing the piston 8. The connector 604 is inserted into the through groove and is interference-fitted with the piston 8, thereby increasing the friction between the connector 604 and the piston 8. This makes the friction between the piston 8 and the connector 604 greater than the friction between the piston 8 and the inner wall of the pump body 3, ensuring that no relative displacement occurs between the main column 6 and the piston 8 when the piston 8 does not contact the second limiting part 302.

[0032] A boss 603 is formed at the connection position between the aforementioned plug 604 and the main column 6. The outer diameter of the boss 603 is larger than the inner diameter of the through groove. The boss 603 and the sealing platform 903 limit the relative displacement distance between the main column 6 and the piston 8.

[0033] A first limiting part 301 and a limiting protrusion 304 are formed on the inner side of the pump body 3 at the position at the end of the upper and lower strokes of the piston 8, respectively; the pushing force required for the piston 8 to disengage downward from the first limiting part 301 is greater than the frictional force between the main column 6 and the piston 8; when the piston 8 moves down to abut against the limiting protrusion 304, the piston 8 is restricted from moving downward.

[0034] For details: Please refer to Figure 7 The diagram shows the unpressed state. In this state, the liquid channel 902 is blocked, the piston 8 is at the upper end of the pump body 3, and the piston 8 is restricted by the first limiting part 301, so that the force required for the piston 8 to move downward is greater than the frictional force between the plug 604 and the piston 8. When the press head 2 is pressed, the main column 6 moves downward, and drives the auxiliary column 9 and the valve plug 10 to move downward. At this time, the piston 8 does not move downward relative to the pump body 3, thereby opening the liquid channel 902. After the main column 6 moves downward a certain distance, the boss 603 abuts against the piston 8. Then the main column 6 drives the piston 8, the auxiliary column 9 and the valve plug 10 to move downward as a whole. The liquid in the pump body 3 enters the main column 6 from the liquid channel 902 and is finally squeezed out from the press head 2, realizing the liquid is dispensed by pressing.

[0035] Please see Figure 7 A schematic diagram of the pressing state (valve ball 11 not shown). In the current state, piston 8 moves to the lower end of pump body 3 and abuts against limiting protrusion 304. At this time, piston 8 can no longer move down. At the same time, valve plug 10 is in a deformed state, and liquid guiding channel 902 is in an open state. When the pressing head 2 is released, the main column 6 moves upward under the action of elastic element. Since the friction between the plug 604 and piston 8 is greater than the friction between piston 8 and inner wall of pump body 3, the upward movement of main column 6 will drive piston 8, secondary column 9 and valve plug 10 to move upward synchronously. Since valve plug 10 is initially in a deformed state, when secondary column 9 moves upward, valve plug 10 is in a state of restoring deformation, and still exerts downward pressure on valve ball 11, so that pump body 3 and bottle body are still in a sealed state. Under this premise, piston 8 moves upward, so that negative pressure is generated in pump body 3 located below piston 8, thereby realizing liquid back suction.

[0036] Please see Figure 7A schematic diagram of the back-suction state. In this state, liquid back-suction has been achieved (see the previous paragraph). At this time, piston 8 is limited by the second limiting part 302. When the main column 6 moves upward, it will move relative to piston 8. The main column 6 drives the auxiliary column 9 and valve plug 10 to move upward relative to piston 8. When the sealing platform 903 on the auxiliary column 9 abuts against piston 8, the liquid guiding channel 902 is blocked. As the main column 6 continues to move upward, it will drive piston 8 past the second limiting part 302. At the same time, valve plug 10 and valve ball 11 disengage from the abutting state. During the process of piston 8 continuing to move upward, negative pressure continues to be generated in pump body 3. The liquid in the bottle pushes up valve ball 11 to enter pump body 3, thereby realizing the replenishment of liquid in pump body 3. Finally, piston 8 moves to Figure 7 The location shown.

[0037] It should be further noted that a valve cavity 303 for placing the valve ball 11 is formed on the inner side of the pump body 3, so that the pump body 3 forms a one-way conduction position at the valve cavity 303.

[0038] Furthermore, a cylindrical groove 601 is formed on the outer side of the main column 6 placed inside the limiting sleeve 5. The elastic element is placed in the cylindrical groove 601, and the two ends of the elastic element abut against the inner end of the cylindrical groove 601 and the inner end of the limiting sleeve 5, respectively. For example, the elastic element is a spring 7. By setting the cylindrical groove 601, a stable installation space is provided for the spring 7, ensuring that the spring 7 will not shift or fall off during operation, thus ensuring the stability and reliability of the entire device operation.

[0039] The inner wall of the limiting sleeve 5 is also formed with an internal thread 501, and the main column 6 is formed with an external thread 602 that is threadedly engaged with the internal thread 501, so as to lock the position of the main column 6 when it is not in use.

[0040] Preferably, in order to prevent the main column 6 from detaching from the limiting sleeve 5, a limiting cover 4 is also snapped onto the limiting sleeve 5. The setting of the limiting cover 4 can effectively prevent the main column 6 from detaching from the limiting sleeve 5 due to unexpected situations during use, further improving the safety and reliability of the device. The limiting cover 4 is firmly fixed to the limiting sleeve 5 through a specific snap-fit ​​structure, which not only ensures the firmness of the connection, but also facilitates disassembly and maintenance when needed.

[0041] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A liquid back-suction emulsion pump body, comprising a threaded cap (1), a pressing head (2), a pump body (3), a limiting sleeve (5), and a main column (6), wherein the main column (6) penetrates the limiting sleeve (5) and extends into the pump body (3), and is connected to an elastic element installed in the limiting sleeve (5), and one end of the main column (6) is connected to the pressing head (2), characterized in that, Also includes: The piston (8) slides sealed within the pump body (3). The other end of the main column (6) is inserted into a through groove formed on the piston (8). The friction between the main column (6) and the piston (8) is greater than the friction between the piston (8) and the pump body (3). A control element is inserted into the main column (6) from the side of the piston (8) away from the main column (6) through the through groove. When the control element is disengaged from the piston (8), the inner side of the main column (6) is... The pump body (3) is in a conductive state on the inside, and the other end cooperates with the valve ball (11) to make the pump body (3) conductive at the valve ball (11) after the piston (8) moves upward a certain distance from the bottom of the pump body (3); the pump body (3) is also provided with a second limiting part (302) on the inner wall, which is used to make the main column (6) move axially relative to the piston (8) after the piston (8) moves upward a certain distance from the bottom of the pump body (3) and drive the conductive control component to abut against the piston (8).

2. The emulsion pump body with liquid back suction function according to claim 1, characterized in that, The conduction control component includes: a sub-column (9), which passes through a through groove from the side of the piston (8) away from the main column (6) and is inserted into the main column (6). A liquid guide level is formed on the sub-column (9). When the sub-column (9) is disengaged from the piston (8), the liquid guide level is in a conducting state. An elastically deformable valve plug (10) is installed on the sub-column (9). When the pressing head (2) is pressed down to the end of the stroke, the valve plug (10) abuts against the valve ball (11) and is in a deformed state.

3. The emulsion pump body with liquid back suction function according to claim 2, characterized in that, The secondary column (9) includes a sealing platform (903) and an insertion platform (904). The insertion platform (904) is inserted into the main column (6). A liquid guiding channel (902) is provided on the insertion platform (904) along the length direction to form the liquid guiding position. An embedded groove (901) is also formed on the insertion platform (904). The inner protrusion (605) on the inner side of the main column (6) is placed in the embedded groove (901).

4. The emulsion pump body with liquid back suction function according to claim 3, characterized in that, The diameter of the sealing platform (903) is greater than the diameter of the insertion platform (904) and greater than the diameter of the through groove, so that a sealing position is formed at the connection between the sealing platform (903) and the insertion platform (904), so that the liquid guiding channel (902) is in a blocked state when the sealing platform (903) abuts against the piston (8).

5. The emulsion pump body with liquid back suction function according to claim 1, characterized in that, The main column (6) has a connector (604) at one end facing the piston (8), the connector (604) is inserted into the through groove and is interference-fitted with the piston (8).

6. The emulsion pump body with liquid back suction function according to claim 5, characterized in that, A boss (603) is formed at the connection position between the plug (604) and the main post (6), and the outer diameter of the boss (603) is larger than the inner diameter of the through groove.

7. The emulsion pump body with liquid back suction function according to claim 1, characterized in that, A first limiting part (301) and a limiting protrusion (304) are formed on the inner side of the pump body (3) at the position at the end of the upper and lower strokes of the piston (8); the pushing force required for the piston (8) to move downward from the first limiting part (301) is greater than the frictional force between the main column (6) and the piston (8); when the piston (8) moves down to abut against the limiting protrusion (304), the piston (8) is restricted from moving downward.

8. The emulsion pump body with liquid back suction function according to claim 1, characterized in that, The pump body (3) has a valve cavity (303) formed on its inner side for placing the valve ball (11) so that the pump body (3) forms a one-way conduction position at the valve cavity (303).

9. A liquid back-suction emulsion pump body according to claim 1, characterized in that, A cylindrical groove (601) is formed on the outside of the main column (6) placed inside the limiting sleeve (5). The elastic element is placed in the cylindrical groove (601) and the two ends of the elastic element abut against the inner end of the cylindrical groove (601) and the inner end of the limiting sleeve (5), respectively.

10. A liquid back-suction emulsion pump body according to claim 1, characterized in that, The inner wall of the limiting sleeve (5) is also formed with an internal thread (501), and the main column (6) is formed with an external thread (602) that is threaded to the internal thread (501).

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