All-plastic up-and-down lock type emulsion pump

Abstract

This invention provides an all-plastic top-and-bottom locking emulsion pump, comprising a pump body and a locking assembly. A valve stem is vertically mounted within the pump body, with a cap mounted on the top of the valve stem. The locking assembly is located within the pump body and includes a locking member sleeved on the valve stem, a locking sleeve mounted on the outside of the locking member, and a drive sleeve fixed within the pump body and located outside the locking sleeve. The locking member has a locking head, and the upper and lower ends of the locking sleeve are respectively provided with an upper locking groove and a lower locking groove that can engage with the locking head for locking. The drive sleeve has a spiral guide groove adapted to the locking head. The upper end of the locking sleeve is driven to the cap, and rotating the cap drives the locking sleeve and locking member to rotate. When locking, rotating the cap causes the locking member, valve stem, and cap to descend synchronously. This all-plastic top-and-bottom locking emulsion pump overcomes the shortcomings of existing emulsion pumps, such as inconvenient operation during locking and short spring life.

Description

Technical Field

[0001] This invention relates to the field of emulsion pump technology, and specifically to an all-plastic top and bottom locking emulsion pump. Background Technology

[0002] In daily life and industrial production, the packaging and dispensing methods of emulsion products are crucial. Emulsion pumps, as a common device used in emulsion product packaging containers, are widely used in cosmetics, skincare products, daily necessities, and some industrial sectors. To prevent accidental pressing of the cap during transportation, which could cause emulsion leakage or loss, a lockable emulsion pump has been designed.

[0003] For example, patent number CN216762809U discloses a top-locking and bottom-locking emulsion pump, which includes a pump body, a pump cover, a cap, and a switch assembly. The switch assembly includes a locking sleeve and a locking member. When the cap is pressed to its lowest position, rotating the cap clockwise causes the front end of the locking member to insert into the lower locking part along the rotation direction, and it is locked in the lower locking part by the action of the locking part. Rotating the cap counterclockwise causes the locking member to disengage from the lower locking part and spring open. In the above structure, when locking the bottom, it is necessary to press the cap to its lowest position first and then rotate the cap, which is a cumbersome and inconvenient step. Moreover, when locking the bottom after pressing the cap to its lowest position, the spring will always be in a fully compressed state. The spring will remain in a fully compressed state for a long time, which will shorten the service life of the spring. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] In view of this, the present invention provides an all-plastic top and bottom locking emulsion pump, which overcomes the shortcomings of existing emulsion pumps, such as inconvenient operation when locked and short service life of springs.

[0006] (II) Technical Solution

[0007] To solve the aforementioned technical problem, the present invention provides an all-plastic top and bottom locking emulsion pump, comprising:

[0008] The pump body contains a valve stem that can be raised and lowered, and a cap is installed at the top of the valve stem;

[0009] A locking assembly, disposed within the pump body, includes a locking member sleeved on the valve stem, a locking sleeve mounted on the outside of the locking member, and a drive sleeve fixed within the pump body and located outside the locking sleeve. The locking member has at least one locking head. The upper and lower ends of the locking sleeve are respectively provided with an upper locking groove and a lower locking groove that can engage with the locking head for locking. The drive sleeve has a spiral guide groove adapted to the locking head. The upper end of the locking sleeve is driven to the head cap; rotating the head cap drives the locking sleeve and the locking member to rotate. When locked, rotating the head cap drives the locking sleeve and the locking member to rotate. Under the action of the spiral guide groove, the locking member, the valve stem, and the head cap descend synchronously, thereby engaging the locking head with the lower locking groove.

[0010] In some embodiments, a plastic spring is installed between the locking member and the cap, and the plastic spring is fitted onto the valve stem; when locking, the locking member, the valve stem, the plastic spring, and the cap rise or fall synchronously.

[0011] In some embodiments, the inner wall of the cap is provided with a plurality of circumferentially spaced limiting protrusions, and the upper end of the locking sleeve is provided with a plurality of circumferentially spaced limiting grooves that are adapted to the limiting protrusions.

[0012] In some embodiments, the locking sleeve is provided with a Z-shaped through groove, and the upper locking slot and the lower locking slot are respectively provided at both ends of the Z-shaped through groove; one end of the locking head passes through the Z-shaped through groove and is placed in the spiral guide groove.

[0013] In some embodiments, the Z-shaped through groove includes an upper transverse slide groove, a lower transverse slide groove, and a vertical slide groove for connecting the upper transverse slide groove and the lower transverse slide groove. The upper transverse slide groove is provided with an upper locking slot at one end away from the vertical slide groove, and the lower transverse slide groove is provided with a lower locking slot at one end away from the vertical slide groove. The lower side of the Z-shaped through groove is provided with an elastic opening groove for inserting the locking head into the Z-shaped through groove.

[0014] In some embodiments, an upper limit stop is provided on one side of the upper locking slot, the upper limit stop being used to restrict the locking head from disengaging from the upper locking slot; a lower limit stop is provided on one side of the lower locking slot, the lower limit stop being used to restrict the locking head from disengaging from the lower locking slot.

[0015] In some embodiments, the lower end of the valve stem is provided with a first limiting flange, and under the action of the plastic spring, the lower end of the locking member abuts against the first limiting flange; there are two locking clips, symmetrically arranged on both sides of the upper end of the locking member.

[0016] In some embodiments, the upper end of the drive sleeve is provided with a second limiting flange, and a plurality of first annular flanges are provided at intervals along the axial direction on its outer circumferential wall; the pump body is provided with a plurality of first annular grooves adapted to the first annular flanges, the second limiting flange abuts against the upper end of the pump body, and the first annular flange engages with the first annular grooves.

[0017] In some embodiments, the lower end of the locking sleeve is provided with a plurality of buckles, and a shoulder portion is provided thereon; the shoulder portion abuts against the drive sleeve, and the buckles engage with the lower end of the drive sleeve.

[0018] In some embodiments, a sealing cap is connected to the lower end of the locking sleeve, a second annular flange is provided on the sealing cap, and a second annular groove is provided at the lower end of the locking sleeve that can engage with the second annular flange; a piston is installed at the bottom of the valve stem via a valve needle, and a one-way valve plate and a suction pipe are installed at the bottom of the pump body; a threaded ring is fitted on the outer side of the pump body.

[0019] (III) Beneficial Effects

[0020] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least:

[0021] 1) When locking this emulsion pump, only the head cap needs to be rotated; the head cap and the locking sleeve are connected by a drive. When the head cap is rotated, the locking sleeve rotates accordingly, which in turn drives the locking component to rotate. At the same time, the spiral guide groove on the drive sleeve cooperates with the locking clip of the locking component, so that the locking component, valve stem, plastic spring and head cap descend synchronously. Finally, the locking clip successfully engages and locks in the lower locking slot. This greatly simplifies the lower locking process. Users do not need complicated operations and can easily complete it with one hand, which significantly improves the user experience and has obvious advantages in terms of ease of operation.

[0022] 2) Whether the emulsion pump is locked at the top or bottom, the plastic spring is only in a pre-compressed state. Since it is not necessary to press the cap to the lowest position to lock, the plastic spring will not be subjected to excessive compression force for a long time, thus effectively preventing elastic fatigue and damage caused by long-term excessive compression, and greatly extending the service life of the plastic spring. This not only reduces the probability of product failure due to spring damage and reduces maintenance and replacement costs, but also improves the overall reliability and durability of the emulsion pump, providing users with a more stable and durable user experience. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a perspective view of an all-plastic top-and-bottom locking emulsion pump of the present invention when it is in the top-locked position;

[0025] Figure 2 This is a cross-sectional view of an all-plastic top and bottom locking emulsion pump of the present invention when it is in the top locking position;

[0026] Figure 3 This is an exploded view of an all-plastic top and bottom locking emulsion pump according to the present invention;

[0027] Figure 4 This is a perspective view of an all-plastic top-and-bottom locking emulsion pump of the present invention when it is in the bottom locked position;

[0028] Figure 5 This is a cross-sectional view of an all-plastic top and bottom locking emulsion pump of the present invention when it is in the bottom locking position;

[0029] Figure 6 This is a perspective view of the locking component in an all-plastic top and bottom locking emulsion pump according to the present invention;

[0030] Figure 7 This is an exploded view of the locking component in an all-plastic top and bottom locking emulsion pump of the present invention;

[0031] Figure 8 This is a perspective view of the connection between the locking element and the locking sleeve in an all-plastic top and bottom locking emulsion pump according to the present invention;

[0032] Figure 9 This is a perspective view of the connection between the valve stem, locking component, plastic spring, and head cap in an all-plastic top-and-bottom locking emulsion pump of the present invention.

[0033] Figure 10 This is a perspective view of the locking sleeve in an all-plastic top and bottom locking emulsion pump according to the present invention;

[0034] Figure 11 This is a schematic diagram of the locking sleeve in an all-plastic top and bottom locking emulsion pump according to the present invention;

[0035] Figure 12 This is a perspective view of the drive sleeve in an all-plastic top and bottom locking emulsion pump according to the present invention;

[0036] Figure 13 This is a perspective view of the drive sleeve in an all-plastic top and bottom locking emulsion pump according to the present invention.

[0037] Figure 14 This is a perspective view of the head cap of an all-plastic top and bottom locking emulsion pump according to the present invention;

[0038] The component names corresponding to the various reference numerals in the figure are as follows: 1. Pump body; 101. First annular groove; 2. Valve stem; 201. First limiting flange; 3. Head cap; 301. Limiting protrusion; 4. Locking component; 401. Locking head; 5. Locking sleeve; 501. Upper locking groove; 502. Lower locking groove; 503. Limiting groove; 504. Z 5041. Upper transverse sliding groove; 5042. Lower transverse sliding groove; 5043. Vertical sliding groove; 505. Upper limit stop block; 506. Lower limit stop block; 507. Snap fastener; 508. Shoulder of shaft; 509. Second annular groove; 510. Elastic opening groove; 6. Drive sleeve; 601. Spiral guide groove; 602. Second limit flange; 603. First annular flange; 7. Plastic spring; 8. Sealing cover; 801. Second annular flange; 9. Valve needle; 10. Piston; 11. One-way valve plate; 12. Suction tube; 13. Threaded ring. Detailed Implementation

[0039] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0040] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0042] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0043] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0044] Combination Figures 1-14 As shown, the present invention provides an all-plastic top and bottom locking emulsion pump, including a pump body 1, a valve stem 2, a head cap 3, and a locking assembly.

[0045] See Figures 1 to 3 Both the pump body 1 and the valve stem 2 are hollow tubular structures. The valve stem 2 is installed vertically inside the pump body 1 and can be raised and lowered. The valve stem 2 is arranged vertically inside the pump body 1. A cap 3 is installed at the top of the valve stem 2. A spray nozzle is provided on the cap 3. A connecting pipe extends from the cap 3 toward the valve stem 2 and is connected to the valve stem 2. The valve stem 2, the connecting pipe and the spray nozzle are connected.

[0046] See Figures 1 to 10 The locking component is located inside the pump body 1. The locking component is used to lock the valve stem 2 and the cap 3 at the top and bottom. The top locking state is the normal use state. In this state, the cap 3 and the valve stem 2 can be pressed normally, and the cap 3 can dispense liquid normally. The bottom locking state is used for transportation and storage. In this state, the cap 3 and the valve stem 2 cannot be pressed, which can prevent the cap 3 from being accidentally touched and facilitate transportation and storage.

[0047] See Figures 1 to 10The locking assembly includes a locking member 4 that is sleeved on the valve stem 2, a locking sleeve 5 installed on the outside of the locking member 4, and a drive sleeve 6 fixed inside the pump body 1 and located outside the locking sleeve 5. The locking member 4, locking sleeve 5, and drive sleeve 6 are all hollow tubular structures. The valve stem 2, locking member 4, locking sleeve 5, drive sleeve 6, and pump body 1 are arranged coaxially. In the upper locked state, the valve stem 2 can be raised and lowered relative to the locking member 4. The locking member 4 is provided with at least one locking head 401, which extends radially along the locking member 4. The upper and lower ends of the locking sleeve 5 are respectively provided with an upper locking groove 501 and a lower locking groove 502 that can engage and lock with the locking head 401. The locking head 401 can switch between the upper locking groove 501 and the lower locking groove 502, thereby switching the locking state. When the locking head 401 engages and locks in the upper locking slot 501, it is in the upper locked state; when the locking head 401 engages and locks in the lower locking slot 502, it is in the lower locked state. The drive sleeve 6 is provided with a spiral guide groove 601 that matches the locking head 401. The end of the locking head 401 passes through the locking sleeve 5 and is placed within the spiral guide groove 601, which extends axially along the drive sleeve 6. The upper end of the locking sleeve 5 extends to the outside of the pump body 1, and is drivenly connected to the head cap 3. That is, rotating the head cap 3 drives the locking sleeve 5 and the locking element 4 to rotate.

[0048] When locking is performed, rotate the cap 3, which drives the locking sleeve 5 to rotate, and the locking sleeve 5 drives the locking member 4 to rotate; under the action of the spiral guide groove 601, the locking member 4, the valve stem 2 and the cap 3 descend synchronously, thereby locking the locking head 401 to engage with the locking groove 502.

[0049] Traditional lotion pumps require pressing the cap to its lowest position and then rotating it to lock, a cumbersome process. This lotion pump, however, only requires rotating the cap to lock, greatly simplifying the process. Users can easily complete the locking with one hand, significantly improving the user experience and demonstrating clear advantages in ease of use.

[0050] In some embodiments, such as Figure 3 , Figure 5 and Figure 9 As shown, a plastic spring 7 is installed between the locking member 4 and the cap 3. The plastic spring 7 is fitted onto the valve stem 2, with one end of the plastic spring 7 abutting against the upper end of the locking member 4 and the other end abutting against the inner side of the cap 3. When locking upwards, the locking member 4, valve stem 2, plastic spring 7, and cap 3 rise synchronously; when locking downwards, the locking member 4, valve stem 2, plastic spring 7, and cap 3 descend synchronously. The specific structure of the plastic spring 7 is prior art and will not be described further in this embodiment.

[0051] In traditional emulsion pumps, the spring remains fully compressed for extended periods when locked, significantly impacting its lifespan. This emulsion pump, however, maintains a pre-compressed state for both top and bottom locking. Since locking is achieved without pressing the cap to its lowest position, the spring is not subjected to excessive compression for prolonged periods, effectively preventing elastic fatigue and damage caused by prolonged over-compression. This significantly extends the spring's lifespan, reducing the probability of product malfunction due to spring damage and lowering repair and replacement costs. Furthermore, it enhances the overall reliability and durability of the emulsion pump, providing users with a more stable and durable user experience.

[0052] In some embodiments, such as Figure 3 , Figure 5 and Figure 9 As shown, the inner wall of the cap 3 is provided with multiple equidistant limiting protrusions 301 arranged in a ring, and the upper end of the locking sleeve 5 is provided with multiple equidistant limiting grooves 503 that are adapted to the limiting protrusions 301. In this structure, the cap 3 achieves a driving connection with the locking sleeve 5 through the cooperation of the limiting protrusions 301 and the limiting grooves 503. When the cap 3 rotates, the cap 3 can rotate in conjunction with the locking sleeve 5 through the limiting action of the limiting protrusions 301 and the limiting grooves 503; when in the upper locked state, the cap 3 can be raised and lowered relative to the locking sleeve 5 through the guiding action of the limiting protrusions 301 and the limiting grooves 503, thereby ensuring the rotation drive and press-to-lift function of the cap 3.

[0053] In some embodiments, such as Figures 5 to 8 As shown, the locking sleeve 5 is provided with a Z-shaped through groove 504, and the locking head 401 is placed in the Z-shaped through groove 504. The upper locking slot 501 and the lower locking slot 502 are respectively provided at both ends of the Z-shaped through groove 504. One end of the locking head 401 passes through the Z-shaped through groove 504 and is placed in the spiral guide groove 601. The lower side of the Z-shaped through groove 504 is provided with an elastic opening slot 510 for inserting the locking head 401 into the Z-shaped through groove 504. The Z-shaped through groove 504 is connected to the outside through the elastic opening slot 510, and the locking head 401 can be inserted into the Z-shaped through groove 504 through the elastic opening slot 510, which is convenient for installation.

[0054] In some embodiments, such as Figure 8 , Figure 10 and Figure 11As shown, the Z-shaped through groove 504 includes an upper transverse sliding groove 5041, a lower transverse sliding groove 5042, and a vertical sliding groove 5043 for connecting the upper transverse sliding groove 5041 and the lower transverse sliding groove 5042. The upper transverse sliding groove 5041 and the lower transverse sliding groove 5042 are arranged parallel to each other, and the vertical sliding groove 5043 is arranged perpendicular to the lower transverse sliding groove 5042. An upper locking groove 501 is provided at the end of the upper transverse sliding groove 5041 away from the vertical sliding groove 5043, and a lower locking groove 502 is provided at the end of the lower transverse sliding groove 5042 away from the vertical sliding groove 5043.

[0055] When locking, rotate the cap 3, which drives the locking sleeve 5 to rotate. At the beginning of the rotation of the locking sleeve 5, the locking member 4 remains stationary. The locking head 401 disengages from the upper locking slot 501 and moves along the upper horizontal slide groove 5041 to the upper end of the vertical slide groove 5043. At this time, the locking sleeve 5 drives the locking member 4 to rotate synchronously. Under the action of the spiral guide groove 601, the locking head 401 moves along the vertical slide groove 5043 to the lower end of the vertical slide groove 5043 while rotating. At this time, the locking member 4 remains stationary, and the locking sleeve 5 continues to rotate. The locking head 401 moves along the lower horizontal slide groove 5042 into the lower locking slot 502 for locking.

[0056] When the upper lock is engaged, the head cap 3 is rotated in the reverse direction. The head cap 3 drives the locking sleeve 5 to rotate in the reverse direction. At the beginning of the reverse rotation of the locking sleeve 5, the locking member 4 remains stationary. The locking head 401 disengages from the lower locking slot 502 and moves along the lower horizontal slide groove 5042 to the lower end of the vertical slide groove 5043. At this time, the locking sleeve 5 drives the locking member 4 to rotate in the reverse direction synchronously. Under the action of the spiral guide groove 601, the locking head 401 moves along the vertical slide groove 5043 to the upper end of the vertical slide groove 5043 while rotating in the reverse direction. At this time, the locking member 4 remains stationary. The locking sleeve 5 continues to rotate in the reverse direction, and the locking head 401 moves along the upper horizontal slide groove 5041 into the upper locking slot 501 for locking.

[0057] In some embodiments, such as Figure 8 , Figure 10 and Figure 11 As shown, an upper limit stop 505 is provided on one side of the upper locking slot 501, which is used to prevent the locking head 401 from disengaging from the upper locking slot 501; a lower limit stop 506 is provided on one side of the lower locking slot 502, which is used to prevent the locking head 401 from disengaging from the lower locking slot 502. The upper limit stop 505 and the lower limit stop 506 can lock the locking head 401, preventing the cap 3 from rotating accidentally. When the force required to rotate the cap 3 is large, the locking head 401 can pass over the upper limit stop 505 or the lower limit stop 506.

[0058] In some embodiments, such as Figure 5and Figure 9 As shown, the lower end of the valve stem 2 is provided with a first limiting flange 201. Under the action of the plastic spring 7, the lower end of the locking member 4 abuts against the first limiting flange 201. There are two locking clips 401, which are symmetrically arranged on both sides of the upper end of the locking member 4. Correspondingly, there are also two Z-shaped through grooves 504 and two spiral guide grooves 601.

[0059] In some embodiments, such as Figure 2 and Figure 12 As shown, the upper end of the drive sleeve 6 is provided with a second limiting flange 602, and multiple first annular flanges 603 are provided at intervals along the axial direction on the outer circumferential wall of the drive sleeve 6, with two first annular flanges 603. The pump body 1 is provided with two first annular grooves 101 that fit with the first annular flanges 603. The second limiting flange 602 abuts against the upper end of the pump body 1, and the first annular flanges 603 engage with the first annular grooves 101. Multiple first stops are provided at equal intervals in annular arrangement on the outer wall of the drive sleeve 6, and multiple second stops corresponding to the first stops are provided inside the pump body 1. Through the cooperation of the first and second stops, the rotation of the drive sleeve 6 relative to the pump body 1 can be restricted.

[0060] In some embodiments, such as Figure 2 , Figure 6 and Figure 8 As shown, the lower end of the locking sleeve 5 is provided with multiple latches 507, two of which are separated by an elastic opening groove 510. The locking sleeve 5 is provided with a shoulder 508, and a limiting groove 503 is provided at the shoulder 508. The shoulder 508 abuts against the drive sleeve 6, and the latches 507 engage with the lower end of the drive sleeve 6, thereby restricting the axial movement of the locking sleeve 5 relative to the drive sleeve 6 while ensuring that the locking sleeve 5 can rotate circumferentially relative to the drive sleeve 6.

[0061] In some embodiments, such as Figure 2 , Figure 3 and Figure 10 As shown, a sealing cap 8 is connected to the lower end of the locking sleeve 5. A second annular flange 801 is provided on the sealing cap 8, and a second annular groove 509 is provided at the lower end of the locking sleeve 5 to engage with the second annular flange 801. A piston 10 is mounted on the bottom of the valve stem 2 via a valve needle 9. A one-way valve plate 11 and a suction tube 12 are mounted on the bottom of the pump body 1. A threaded ring 13 is fitted on the outer side of the pump body 1, and the threaded ring 13 has internal threads for connecting the pump body 1 and the bottle. All components of this emulsion pump are made of plastic for easy recycling.

[0062] In this specification, the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the descriptions of the embodiments described later are relatively simple, and relevant parts can be referred to the descriptions of the foregoing embodiments.

[0063] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A fully plastic top-and-bottom locking emulsion pump, characterized in that, include: The pump body (1) has a valve stem (2) that can be raised and lowered inside it, and a cap (3) is installed on the top of the valve stem (2). A locking assembly is disposed within the pump body (1), comprising a locking member (4) sleeved on the valve stem (2), a locking sleeve (5) mounted on the outside of the locking member (4), and a drive sleeve (6) fixed within the pump body (1) and located outside the locking sleeve (5). The locking member (4) is provided with at least one locking head (401). The upper and lower ends of the locking sleeve (5) are respectively provided with an upper locking groove (501) and a lower locking groove (502) that can engage and lock with the locking head (401). The drive sleeve (6) is provided with a locking mechanism that engages with the locking head (401). A spiral guide groove (601) is adapted to the locking head (401); the upper end of the locking sleeve (5) is driven to connect with the cap (3), and the locking sleeve (5) and the locking member (4) can be driven to rotate when the cap (3) is rotated; when the lower locking is engaged, the cap (3) is rotated to drive the locking sleeve (5) and the locking member (4) to rotate, and under the action of the spiral guide groove (601), the locking member (4), the valve stem (2) and the cap (3) descend synchronously, so that the locking head (401) engages and locks the lower locking groove (502).

2. The all-plastic top and bottom locking emulsion pump according to claim 1, characterized in that: A plastic spring (7) is installed between the locking member (4) and the cap (3), and the plastic spring (7) is fitted onto the valve stem (2); when locking, the locking member (4), the valve stem (2), the plastic spring (7) and the cap (3) rise or fall synchronously.

3. The all-plastic top and bottom locking emulsion pump according to claim 1, characterized in that: The inner wall of the cap (3) is provided with a plurality of limiting protrusions (301) at equal intervals in a ring, and the upper end of the locking sleeve (5) is provided with a plurality of limiting grooves (503) that are adapted to the limiting protrusions (301).

4. The all-plastic top and bottom locking emulsion pump according to claim 1, characterized in that: The locking sleeve (5) is provided with a Z-shaped through groove (504), the upper locking slot (501) and the lower locking slot (502) are respectively provided at both ends of the Z-shaped through groove (504); one end of the locking head (401) passes through the Z-shaped through groove (504) and is placed in the spiral guide groove (601).

5. The all-plastic top and bottom locking emulsion pump according to claim 4, characterized in that: The Z-shaped through groove (504) includes an upper transverse sliding groove (5041), a lower transverse sliding groove (5042), and a vertical sliding groove (5043) for connecting the upper transverse sliding groove (5041) and the lower transverse sliding groove (5042). The upper transverse sliding groove (5041) is provided with an upper locking slot (501) at one end away from the vertical sliding groove (5043), and the lower transverse sliding groove (5042) is provided with a lower locking slot (502) at one end away from the vertical sliding groove (5043). The lower side of the Z-shaped through groove (504) is provided with an elastic opening groove (510) for inserting the locking head (401) into the Z-shaped through groove (504).

6. The all-plastic top and bottom locking emulsion pump according to claim 1, characterized in that: An upper limit stop (505) is provided on one side of the upper locking slot (501), which is used to restrict the locking head (401) from disengaging from the upper locking slot (501); a lower limit stop (506) is provided on one side of the lower locking slot (502), which is used to restrict the locking head (401) from disengaging from the lower locking slot (502).

7. The all-plastic top and bottom locking emulsion pump according to claim 2, characterized in that: The lower end of the valve stem (2) is provided with a first limiting flange (201). Under the action of the plastic spring (7), the lower end of the locking member (4) abuts against the first limiting flange (201). There are two locking clips (401), which are symmetrically arranged on both sides of the upper end of the locking member (4).

8. The all-plastic top and bottom locking emulsion pump according to claim 1, characterized in that: The upper end of the drive sleeve (6) is provided with a second limiting flange (602), and a plurality of first annular flanges (603) are provided at intervals along the axial direction on its outer circumferential wall; the pump body (1) is provided with a plurality of first annular grooves (101) that are adapted to the first annular flanges (603), the second limiting flange (602) abuts against the upper end of the pump body (1), and the first annular flanges (603) engage with the first annular grooves (101).

9. The all-plastic top and bottom locking emulsion pump according to claim 1, characterized in that: The lower end of the locking sleeve (5) is provided with a plurality of buckles (507), and a shoulder (508) is provided thereon; the shoulder (508) abuts against the driving sleeve (6), and the buckles (507) are engaged with the lower end of the driving sleeve (6).

10. The all-plastic top and bottom locking emulsion pump according to claim 1, characterized in that: The lower end of the locking sleeve (5) is connected to a sealing cap (8), and the sealing cap (8) is provided with a second annular flange (801). The lower end of the locking sleeve (5) is provided with a second annular groove (509) that can engage with the second annular flange (801). The bottom of the valve stem (2) is fitted with a piston (10) through a valve needle (9). The bottom of the pump body (1) is fitted with a one-way valve plate (11) and a suction tube (12). The outer side of the pump body (1) is fitted with a threaded ring (13).

Images