Simple on-off pump head

Abstract

A simple switch pump head, including pump body, screw ring, pump head and limit sleeve, screw ring top extension column, hollow connecting column is equipped with limit groove, limit block is equipped in limit sleeve side and is matched in limit groove, and the operation part with handle is formed outside convex. The connecting column top end surface is equipped with sunken step surface and limit wall, the guide slope is equipped between limit groove and sunken step surface, and limit groove and limit block are symmetrically arranged. Limit sleeve rotates after moving upwards, and limit block is abutted between pump head and connecting column, mechanical blocking is formed, and the upper and lower ends of handle exceed limit block and are exposed when locking. Users can realize "visual + tactile" double identification through limit sleeve height difference and handle tactile feedback, complete locking / unlocking through "moving + rotating" compound action in standing state, prevent mispressing through mechanical blocking, and improve operation stability and fluency through symmetric structure and guide slope.

Description

Technical Field

[0001] This utility model relates to the field of push-pump technology, and in particular to a simple switch pump head. Background Technology

[0002] In the field of push-pump technology, the anti-accidental pressing limiting structure of push-pump heads has always been a key research direction for improving product reliability and user experience. Existing emulsion pump limiting solutions mainly restrict the pressing action of the pump head through mechanical structures, among which the rotary limiting structure is the most common. However, this type of structure has obvious defects in practical applications.

[0003] Rotary limiting structures typically achieve limiting by misaligning the rotating sleeve with the pump head insert at an angle. For example, the Chinese utility model patent "An Emulsion Pump" disclosed in application number 202221922193.2 (authorization announcement number CN217970704U) uses a rotating sleeve on the upper part of the threaded cap, and controls the pressing state by aligning or misaligning the limiting groove on the rotating sleeve with the pump head insert. However, this solution also has certain technical drawbacks: on the one hand, the limiting state depends on the rotation angle switching of the rotating sleeve within the same height plane, and users cannot intuitively judge whether the rotating sleeve is in the limiting position through vision or touch. For example, in low light or during rapid operation, misjudgment can easily lead to accidental pressing of the pump head; on the other hand, because the rotating sleeve only rotates in a plane, this structure cannot achieve blind operation switching through tactile feedback—when users need to use it without visual assistance (such as at night or in blind box scenarios), it is difficult to perceive the specific position of the rotating sleeve by touch, significantly reducing the convenience and reliability of operation.

[0004] Although existing technologies optimize the stability of rotary structures through designs such as torsion spring reset and snap-fit ​​limiting, they have not yet solved the fundamental problem of "visualizing the limit status." For fields such as cosmetics and pharmaceuticals, which have high requirements for sealing and preventing misoperation, users urgently need a lotion pump structure that can directly display the limit status through changes in physical position to avoid product leakage or contamination due to misjudgment.

[0005] Therefore, how to provide a push pump based on the cooperation of an up-and-down moving limiting sleeve and an extended limiting groove, so as to achieve "visual + tactile" dual recognition of the limiting state through intuitive positional differences (especially the blind cutting function), thereby solving the shortcomings of the existing rotary structure in terms of operation recognition and blind operation adaptability, has become an urgent technical problem to be solved in the field of push pump technology. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a simple switch pump head that intuitively displays the locking status through the combined axial displacement and rotational motion of the limiting sleeve, thereby having both visual and tactile recognition functions, in light of the above-mentioned existing technology.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problem is as follows: the simple switch pump head includes a pump body, and also includes...

[0008] A threaded ring is provided on the pump body, with a hollow connecting column extending upward from its top. The top end face of the connecting column is provided with a limiting groove that extends vertically and penetrates the side wall.

[0009] The pump head is located at the top of the pump body and above the connecting column;

[0010] A limiting sleeve is provided inside the connecting column and can move axially and rotate circumferentially. The side of the limiting sleeve is provided with a limiting block that protrudes radially outward and can be adapted to the limiting groove.

[0011] In the locked state, the limiting sleeve moves up to the top end face of the connecting column, the limiting sleeve is rotated to make the limiting block deviate from the limiting groove, and the upper surface of the limiting block abuts against the bottom of the pump head, and the lower surface abuts against the top end face of the connecting column, forming a mechanical block to limit the pump head from pressing down.

[0012] In the unlocked state, rotate the limiting sleeve to align the limiting block with the limiting groove, the limiting sleeve moves down to reset, and the limiting block disengages from the contact position between the bottom of the pump head and the top end face of the connecting column, allowing the pump head to be pressed down.

[0013] To facilitate user gripping of the limiting sleeve and improve ease of use, preferably, the limiting block extends outward and protrudes from the outer periphery of the connecting post, thereby forming an easy-to-operate operating part.

[0014] To further optimize the operating feel and facilitate users to accurately locate the operating position through touch, preferably, the outer end of the operating part is provided with a handle extending in the vertical direction, and the dimension of the handle in the horizontal direction is greater than the horizontal width of the limiting block.

[0015] In order to enhance tactile feedback through differences in physical structure, so that users can quickly determine the limiting state by touching the position difference between the upper and lower ends of the handle when operating blindly, preferably, the upper end of the handle is higher than the upper surface of the limiting block and the lower end is lower than the lower surface of the limiting block.

[0016] Furthermore, when the limiting sleeve is in the locked state, the upper and lower ends of the handle are located on the outer periphery of the pump head and the connecting column, respectively.

[0017] To conform to ergonomic design, reduce friction during operation, and improve grip comfort, the handle is preferably circular or elliptical in cross-section.

[0018] In order to limit the rotation range of the limiting block through a mechanical structure, ensure that the limiting block accurately stops at the locking position, and avoid excessive rotation leading to limiting failure, preferably, the top surface of the connecting column is provided with a recessed step surface. The height of the recessed step surface is lower than the top surface of the connecting column and it is connected to the limiting groove. The side of the recessed step surface away from the limiting groove forms a limiting wall.

[0019] When the limiting block rotates away from the limiting groove to the area of ​​the sunken step surface, its rotation path is restricted by the limiting wall.

[0020] In order to reduce the frictional resistance when the limiting block rotates and ensure a smooth transition from the limiting groove to the sunken step surface, avoiding jamming, preferably, a guide slope is formed at the connection between the top opening of the limiting groove and the sunken step surface.

[0021] When the limiting block rotates into or out of the limiting groove, the guide slope can guide the limiting block to smoothly transition between the sunken step surface and the limiting groove.

[0022] In order to achieve balanced force distribution on the limiting sleeve through a symmetrical structure, avoid skew and jamming caused by unilateral force, and improve the stability of the limiting structure, preferably, there are two limiting grooves, which are symmetrically distributed around the circumference of the connecting column, and two corresponding limiting blocks are provided, which are coaxially and symmetrically arranged with the limiting grooves.

[0023] In order to improve locking reliability through the tight fit between the annular limiting sleeve and the pump head connection, and to simplify the assembly process, preferably, the bottom of the pump head is provided with a downwardly extending first connecting pipe, and the upper end of the pump body is formed with an upwardly extending second connecting pipe, the second connecting pipe being inserted into the first connecting pipe;

[0024] The limiting sleeve is an annular body, and the limiting block is integrally formed on the outer circumferential surface of the limiting sleeve. When the limiting sleeve is in the locked state, the inner circumference of the limiting sleeve is sleeved on the outer circumferential side of the first connecting pipe.

[0025] Compared with the prior art, the advantages of this utility model are as follows: By setting a threaded ring on the pump body, the top surface of the connecting column extending from its top is provided with a vertically penetrating limiting groove through the side wall. At the same time, a limiting sleeve that can move axially and rotate circumferentially is set inside the connecting column, and the limiting block on the side of the limiting sleeve is adapted to the limiting groove. Since the limiting sleeve moves up to the top surface of the connecting column and rotates when locked, the limiting block deviates from the limiting groove and abuts between the bottom of the pump head and the top surface of the connecting column to form a mechanical block. When unlocking, the limiting sleeve rotates back to align the limiting block with the limiting groove and then falls back to its original position. Therefore, it is not necessary to rely on the rotation angle of a single plane to determine the state. Users can directly identify the locked / unlocked state by observing the vertical position difference of the limiting sleeve. When standing, they can switch blindly by touching the height position of the limiting sleeve or the contact state of the limiting block without bending over. At the same time, the mechanical blocking structure forms a rigid limit through physical contact, which is more reliable than the traditional rotational misalignment limit and can effectively prevent accidental pressing caused by external forces such as bumps. Moreover, the operation process of compound action (movement + rotation) needs to be completed in two steps, which can significantly reduce the probability of accidental touch. It solves the problems of insufficient visualization of the limit state and difficulty of blind operation in the existing technology, and improves the safety of product use and user experience. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of this embodiment;

[0027] Figure 2 This is a three-dimensional exploded view of this embodiment;

[0028] Figure 3 This is a three-dimensional exploded view from another angle of this embodiment;

[0029] Figure 4 This is a cross-sectional view of this embodiment;

[0030] Figure 5 This is a side view structural diagram of the connecting sleeve in this embodiment;

[0031] Figure 6 This is a schematic diagram of the internal structure of the connecting sleeve in this embodiment. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] Figures 1-6 The diagram shown is a schematic diagram of this embodiment. The simplified switch pump head in this embodiment includes a pump body 1, a threaded ring 2, a pump head 3, and a limiting sleeve 4, etc.

[0034] The structure and connection method of each component are described below.

[0035] Pump body 1: Pump body 1 adopts a conventional pump pressure structure. The upper end is provided with an upward-extending second connecting pipe 1a. The second connecting pipe 1a is a tubular body used for pumping materials upward. The second connecting pipe 1a can also be used to connect with other components to provide stable support.

[0036] Threaded ring 2: Threaded ring 2 is located on the shoulder of pump body 1. The internal thread of its inner wall connects with the external thread of the outer bottle body. A hollow connecting post 2a extends from the top of threaded ring 2. A vertically penetrating limiting groove 2a1 is provided on the top surface of connecting post 2a. The limiting groove 2a1 is a rectangular through groove. The top surface of connecting post 2a also has a recessed step surface 2a2. The height of the recessed step surface 2a2 is lower than the top surface of connecting post 2a and it communicates with the limiting groove 2a1. A limiting wall 2a3 is formed on the side of the recessed step surface 2a2 that is away from the limiting groove 2a1. When the limiting block 4a rotates away from the limiting groove 2a1 to the area of ​​the recessed step surface 2a2, its rotation path is restricted by the limiting wall 2a3. A guide slope 2a4 is also provided at the connection between the top opening of the limiting groove 2a1 and the recessed step surface 2a2. There are two limiting grooves 2a1 here, which are symmetrically distributed around the connecting column 2a, and are used to cooperate with the limiting block 4a to realize the functions of vertical guidance and limiting.

[0037] Pump head 3: Pump head 3 is located at the top of pump body 1. A first connecting pipe 3a, extending downwards and forming a tube, is located at the bottom. The inner wall of the first connecting pipe 3a has an annular groove that engages with the annular groove on the outer circumference of the second connecting pipe 1a of pump body 1, thereby achieving axial positioning. The top of pump head 3 is a pressing part with a liquid outlet channel running through it. Its lower end communicates with the inner cavity of pump body 1, allowing liquid to be drawn and discharged by pressing.

[0038] Limiting sleeve 4: The limiting sleeve 4 is an annular body. The limiting sleeve 4 is built into the hollow part of the connecting column 2a and can move axially and rotate circumferentially. Its outer circumferential surface is integrally formed with a radially protruding limiting block 4a. The limiting block 4a is rectangular and can fit into the limiting groove 2a1. It can move up and down along the limiting groove 2a1. When the limiting sleeve 4 is in the unlocked state, it is only allowed to move axially. After the limiting sleeve 4 moves up to the top surface of the connecting column 2a, it is allowed to rotate circumferentially, so as to switch to the locked state. When the limiting sleeve 4 rises and rotates to be in the locked state, the inner circumferential surface of the limiting sleeve 4 just surrounds the outer circumferential side of the first connecting pipe 3a of the pump head 3.

[0039] The limiting block 4a of the limiting sleeve 4 extends outward and protrudes from the outer periphery of the connecting post 2a, forming an easily grippable operating part 4b. The outer end of the operating part 4b is also provided with a vertically extending handle 4b1. The handle 4b1 has a circular or elliptical cross-section, and its lateral dimension is larger than the lateral width of the limiting block 4a. The upper end of the handle is higher than the upper surface of the limiting block 4a, and the lower end is lower than the lower surface of the limiting block 4a. Two limiting blocks 4a are also provided here, and they are symmetrically arranged coaxially with the limiting groove 2a1. The locking state of the pump head 3 can be controlled as needed by moving and rotating within the limiting groove 2a1.

[0040] The working principle of the simplified switch pump in this embodiment is as follows:

[0041] 1. Locked state

[0042] First, push the limiting sleeve 4 upwards, causing the limiting block 4a to slide up along the limiting groove 2a1 to the top surface of the connecting column 2a. Then, rotate the limiting sleeve 4 in the set direction, causing the limiting block 4a to slide from the limiting groove 2a1 into the recessed step surface 2a2. At this point, the upper surface of the limiting block 4a abuts against the bottom of the pump head 3, and the lower surface abuts against the recessed step surface 2a2. The pump head 3 is mechanically limited axially and cannot be pressed down, thus completing the locking. After the limiting sleeve 4 rotates to the set angle, its rotation path is blocked by the limiting wall 2a3, forming a circumferential mechanical limit, preventing further rotation. The user can quickly determine the locking status by observing the height difference after the limiting sleeve 4 moves upwards, or by touching the handle 4b1 to obtain tactile feedback of the height difference.

[0043] 2. Unlocked status

[0044] When the limiting sleeve 4 is rotated in the opposite direction, the limiting block 4a slides into the limiting groove 2a1 and aligns under the guidance of the guide slope 2a4. The limiting sleeve 4 falls back to its original position under its own weight or external force, so that the limiting block 4a slides to the bottom along the limiting groove 2a1. The top part of the limiting block 4a disengages from the bottom of the pump head 3, and the pump head 3 is released from obstruction and is pressed down smoothly. The liquid is pumped out smoothly from the liquid outlet channel through the piston structure inside the pump body 1.

[0045] This embodiment achieves visual and tactile dual recognition of the limiting state through the combined action of "axial movement + circumferential rotation" of the limiting sleeve 4, combined with the sunken step surface 2a2, the limiting wall 2a3 and the guide slope 2a4. The purely mechanical blocking structure improves the reliability of preventing accidental pressing, the symmetrical limiting groove 2a1 and the limiting block 4a ensure balanced force, and the guide slope 2a4 and the circular handle 4b1 optimize the smoothness of operation, thus solving the problems of the limiting state not being intuitive and the difficulty of blind operation in the prior art.

[0046] It should be noted that in the description of this embodiment, the terms "front," "rear," "left," "right," "inner," "outer," "upper," and "lower," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are merely for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A simple switchable pump head, comprising a pump body (1), characterized in that: Also includes A threaded ring (2) is provided on the pump body (1), and a hollow connecting column (2a) extends upward from its top. The top end face of the connecting column (2a) is provided with a limiting groove (2a1) that extends vertically and penetrates the side wall. The pump head (3) is located at the top of the pump body (1) and above the connecting column (2a); The limiting sleeve (4) is located inside the connecting column (2a) and can move axially and rotate circumferentially. The side of the limiting sleeve (4) is provided with a limiting block (4a) that protrudes radially outward and can be adapted to the limiting groove (2a1). In the locked state, the limiting sleeve (4) moves up to the top end face of the connecting column (2a), and the limiting sleeve (4) is rotated to make the limiting block (4a) deviate from the limiting groove (2a1), and the upper surface of the limiting block (4a) abuts against the bottom of the pump head (3), and the lower surface abuts against the top end face of the connecting column (2a), forming a mechanical block to restrict the pump head (3) from pressing down; In the unlocked state, rotate the limiting sleeve (4) to align the limiting block (4a) with the limiting groove (2a1), the limiting sleeve (4) moves down to reset, and the limiting block (4a) disengages from the contact position between the bottom of the pump head (3) and the top end face of the connecting column (2a), allowing the pump head (3) to press down.

2. The simplified switch pump head according to claim 1, characterized in that: The limiting block (4a) extends outward and protrudes from the outer periphery of the connecting post (2a), thereby forming an operating part (4b) that is easy to operate.

3. The simplified switching pump head according to claim 2, characterized in that: The outer end of the operating part (4b) is provided with a handle (4b1) extending in the vertical direction, and the dimension of the handle (4b1) in the horizontal direction is greater than the horizontal width of the limiting block (4a).

4. The simplified switching pump head according to claim 3, characterized in that: The upper end of the handle (4b1) is higher than the upper surface of the limiting block (4a), and the lower end is lower than the lower surface of the limiting block (4a); Furthermore, when the limiting sleeve (4) is in the locked state, the upper and lower ends of the handle (4b1) are located on the outer periphery of the pump head (3) and the connecting column (2a), respectively.

5. The simplified switching pump head according to claim 3, characterized in that: The handle (4b1) has a circular or elliptical cross-section.

6. The simplified switching pump head according to claim 1, characterized in that: The top surface of the connecting column (2a) is provided with a recessed step surface (2a2), the height of which is lower than the top surface of the connecting column (2a) and is connected to the limiting groove (2a1). A limiting wall (2a3) is formed on the side of the recessed step surface (2a2) that is away from the limiting groove (2a1). When the limiting block (4a) rotates away from the limiting groove (2a1) to the area of ​​the sunken step surface (2a2), its rotation path is restricted by the limiting wall (2a3).

7. The simplified switch pump head according to claim 6, characterized in that: A guide slope (2a4) is formed at the connection between the top opening of the limiting groove (2a1) and the sunken step surface (2a2); When the limiting block (4a) rotates into or out of the limiting groove (2a1), the guide slope (2a4) can guide the limiting block (4a) to smoothly transition between the sunken step surface (2a2) and the limiting groove (2a1).

8. The simplified switching pump head according to claim 1, characterized in that: Two limiting grooves (2a1) are provided, and the two limiting grooves (2a1) are symmetrically distributed around the connecting column (2a). Two limiting blocks (4a) are provided accordingly, and are coaxially symmetrically arranged with the limiting grooves (2a1).

9. The simplified switch pump head according to claim 1, characterized in that: The pump head (3) has a first connecting pipe (3a) extending downward at the bottom, and the pump body (1) has a second connecting pipe (1a) extending upward at the upper end, and the second connecting pipe (1a) is inserted into the first connecting pipe (3a). The limiting sleeve (4) is an annular body, and the limiting block (4a) is integrally formed on the outer peripheral surface of the limiting sleeve (4). When the limiting sleeve (4) is in the locked state, the inner periphery of the limiting sleeve (4) is sleeved on the outer peripheral side of the first connecting pipe (3a).

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