A press pump

Abstract

This invention discloses a push-button pump, comprising: a mounting cover for connection to a container; a main pump disposed on the mounting cover, the main pump including a piston rod capable of vertical movement relative to the mounting cover, one end of the piston rod connected to a piston member, and the other end connected to a push-button; and a limiting member movably disposed on the mounting cover, the limiting member being movable relative to the mounting cover to have a locked position and a clearance position; wherein, a first flange extending circumferentially is provided on the outer periphery of the piston rod, when the limiting member is in the locked position, the limiting member abuts against the first flange to prevent the piston rod from moving upward relative to the mounting cover, and when the limiting member is in the clearance position, the limiting member clearances the first flange, allowing the piston rod to rise relative to the mounting cover. By disposing of the first flange on the piston rod, the limiting member abuts against the first flange to lock the piston rod and the push-button in a pressed state. Since the first flange extends circumferentially on the piston rod, the limiting member can still maintain contact with the first flange when the push-button is subjected to a collision with an external object.

Description

Technical Field

[0001] This invention relates to a push-button pump. Background Technology

[0002] A push-button pump is typically installed at the opening of a container and is used by the user to manually dispense liquid products from the container for use. To facilitate storage and transportation, a threaded connection is usually incorporated between the push-button and the mounting cap to prevent the push-button from popping out, thus preventing liquid leakage during transport and reducing the pump's size. However, the push-button is usually bent, making it susceptible to rotation from external objects, which can disengage the threaded connection between the push-button and the mounting cap, causing the push-button to pop out. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a press pump that enables the press head to remain in a depressed state during transportation.

[0004] A push-button pump according to an embodiment of the present invention includes: a mounting cover for connection to a container; a main pump disposed on the mounting cover, the main pump including a piston rod capable of vertical movement relative to the mounting cover, one end of the piston rod being connected to a piston member and the other end being connected to a push-button; and a limiting member movably disposed on the mounting cover, the limiting member being movable relative to the mounting cover to have a locked position and a clearance position; wherein, the piston rod has a first flange extending circumferentially therefrom, when the limiting member is in the locked position, the limiting member abuts against the first flange to prevent the piston rod from moving upward relative to the mounting cover, and when the limiting member is in the clearance position, the limiting member clearances the first flange so that the piston rod can rise relative to the mounting cover.

[0005] A push-button pump according to an embodiment of the present invention has at least the following beneficial effects:

[0006] By setting a first flange on the piston rod, a limiting member abuts against the first flange to lock the piston rod and the push-up head in a pressed state. The first flange extends circumferentially on the piston rod, and when the push-up head is subjected to a collision with an external object and a transmission occurs, the limiting member can still abut against the first flange to keep the piston rod and the push-up head in a pressed state.

[0007] In some embodiments of the present invention, a locking cover is provided at the upper end of the mounting cover, the locking cover being rotatable relative to the mounting cover, and the locking cover driving the limiting member to move between the locking position and the avoidance position when rotating.

[0008] In some embodiments of the present invention, the upper end face of the limiting member is provided with a driving groove, and the lock cover has a driving rod extending from the driving groove. When the lock cover rotates, the driving rod slides along the driving groove and abuts against the side wall of the driving groove to drive the limiting member to reciprocate radially along the piston rod.

[0009] In some embodiments of the present invention, the drive groove is a strip groove having a first end and a second end. The distance between the first end and the axis of the piston rod is less than the distance between the second end and the axis of the piston rod. When the lock cover rotates to the first end, the limiting member moves to the avoidance position; when the lock cover rotates to the second end, the limiting member moves to the locking position.

[0010] In some embodiments of the present invention, the mounting cover has two spaced-apart limiting plates, and a guide groove is defined between the two limiting plates. The limiting member is located in the guide groove and slides along the extension direction of the guide groove.

[0011] In some embodiments of the present invention, the limiting plate is provided with a sliding groove extending along the sliding direction of the limiting member, and sliding portions that cooperate with the sliding groove are provided on both sides of the sliding direction of the limiting member. The sliding portions are disposed in the sliding groove to restrict the limiting member from disengaging from the guide groove.

[0012] In some embodiments of the present invention, the sliding groove extends through the limiting plate at one end near the piston rod.

[0013] In some embodiments of the present invention, the end face of the limiting member near the piston rod is a first arc surface, and the first arc surface is provided with a limiting part. When the limiting member is in the locked position, the limiting part abuts against the first flange.

[0014] In some embodiments of the present invention, the upper end face of the mounting cover is provided with an annular portion, the outer peripheral surface of the annular portion is provided with an annular groove extending circumferentially thereon, and the inner peripheral wall of the lock cover is provided with an annular protrusion extending circumferentially thereon, the annular protrusion being engaged in the annular groove to prevent the lock cover from detaching from the mounting cover.

[0015] In some embodiments of the present invention, one of the mounting cover and the locking cover is provided with a limiting protrusion, and the other is provided with a limiting groove that cooperates with the limiting protrusion. The limiting protrusion is engaged in the limiting groove to stabilize the limiting member in the locked position.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the structure of a push pump according to an embodiment of the present invention;

[0019] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the embodiment;

[0020] Figure 3 for Figure 1 Another perspective structural diagram of the embodiment;

[0021] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0022] Figure 5 for Figure 1 Cross-sectional view of the embodiment;

[0023] Figure 6 for Figure 1 A schematic diagram of the structure of the mounting cover;

[0024] Figure 7 for Figure 1 Schematic diagram of the central locking cover;

[0025] Figure 8 for Figure 1 A schematic diagram of the middle limiting component.

[0026] Figure label:

[0027] 100 points for pressing the head

[0028] Lock cover 200, drive rod 210, annular protrusion 220, lower extension 230, limiting protrusion 231.

[0029] Limiting component 300, strip groove 310, first end 311, second end 312, first arc surface 320, limiting part 330, second arc surface 331, sliding part 340.

[0030] Mounting cover 400, annular portion 410, annular groove 411, mounting cavity 420, limiting plate 430, sliding groove 431, clearance groove 432, guide groove 440, limiting groove 450.

[0031] Spring 500

[0032] Main pump 600, pump body 610, piston rod 620, first flange 621, piston component 630, piston seat 631.

[0033] 700 marbles

[0034] 800mm liquid guide tube. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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 limiting this invention.

[0037] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0038] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0039] Reference Figures 1 to 3 As shown, a press pump in an embodiment of the present invention includes: a mounting cover 400, a main pump 600, and a limiting member 300.

[0040] The mounting cap 400 is used to connect to a container, which includes a bottle body for holding liquid. The mounting cap 400 is screwed onto the bottle opening of the bottle body via threads. The liquid can be shower gel, shampoo, etc.

[0041] The main pump 600 is located on the mounting cover 400. The main pump 600 includes a piston rod 620 that can move up and down relative to the mounting cover 400. One end of the piston rod 620 is connected to the piston member 630, and the other end is connected to the push head 100.

[0042] Specifically, refer to Figure 3As shown, the main pump 600 includes a pump body 610 connected to the lower end of the mounting cover 400. The pump body 610 has a pump chamber, and a piston 630 is vertically mounted within the pump chamber. The piston 630 is connected to one end of a piston rod 620 via a piston seat 631. A through hole is provided on the upper surface of the mounting cover 400, and the other end of the piston rod 620 passes through the through hole and connects to the push head 100. A spring 500 is provided between the piston tube and the mounting cover 400, and the spring 500 can drive the piston rod 620 to rise relative to the mounting cover 400.

[0043] A liquid inlet is provided at the lower end of the pump chamber. A ball bearing 700 is installed inside the pump chamber to block the liquid inlet. Liquid in the container can push the ball bearing 700 to enter the pump chamber through the liquid inlet, while the solution in the pump chamber cannot flow back into the container through the liquid inlet. A liquid guide tube 800 is connected to the liquid inlet, so that the solution at the bottom of the container can be pumped out.

[0044] The piston head 100, piston rod 620, and mounting base are connected in sequence. All three have internal cavities and are interconnected to form a liquid outlet channel. A first port is formed on the outer circumferential surface of the piston seat 631, and the liquid outlet pipe connects to the pump chamber through this first port. The piston 630 is vertically movable and fitted onto the piston seat 631. The piston 630 can descend relative to the piston seat 631 to cover the first port, or rise relative to the piston seat 631 to open the first port.

[0045] Understandably, when the spring 500 drives the piston rod 620 to rise, the piston 630 remains temporarily stationary due to friction with the pump chamber sidewall. The piston seat 631 and piston rod 620 rise relative to the piston 630 until the piston 630 blocks the first port. The piston rod 620 and piston 630 remain relatively stationary and continue to rise together. The pressure inside the pump chamber decreases, and the liquid in the container pushes open the ball 700 and enters the pump chamber. When the user presses the nozzle 100, the piston 630 remains temporarily stationary due to friction with the pump chamber sidewall. The piston seat 631 and piston rod 621 descend relative to the piston 630 until the piston 630 opens the first port. The piston rod 620 and piston 630 remain relatively stationary and continue to descend together. The liquid in the pump chamber enters the outlet channel through the first port and flows out through the outlet channel for the user's use.

[0046] The limiting member 300 is movable on the mounting cover 400, and the limiting member 300 can move relative to the mounting cover 400 to have a locked position and an avoidance position;

[0047] The piston rod 620 has a first flange 621 extending circumferentially around its outer periphery. When the limiting member 300 is in the locked position, the limiting member 300 abuts against the first flange 621 to prevent the piston rod 620 from moving upward relative to the mounting cover 400. When the limiting member 300 is in the avoidance position, the limiting member 300 avoids the first flange 621 so that the piston rod 620 can rise relative to the mounting cover 400.

[0048] Understandably, by providing the first flange 621 on the piston rod 620, the limiting member 300 abuts against the first flange 621 to lock the piston rod 620 and the push-up head 100 in a pressed state. The first flange 621 extends circumferentially on the piston rod 620, and when the push-up head 100 is subjected to a collision with an external object causing transmission, the limiting member 300 can still maintain contact with the first flange 621 to keep the piston rod 620 and the push-up head 100 in a pressed state.

[0049] Specifically, the first flange 621 extends circumferentially along the piston rod 620. This ensures that the first flange 621 and the limiting member 300 maintain a contact relationship when the piston rod 620 rotates, and also facilitates manufacturing. Two limiting members 300 are provided, symmetrically arranged, to ensure balanced force distribution on the piston rod 620.

[0050] In some embodiments, the pusher head 100 is rotatably mounted on the piston rod 620. Thus, when the pusher head 100 rotates due to interference from external objects, it will not cause the piston rod 620 to rotate.

[0051] In some other embodiments, the push head 100 is fixedly connected to the piston rod 620, and the push head 100 and the mounting cover 400 are connected by threads to keep the push head 100 in a pressed state. It is understood that when the push head 100 rotates, due to the threaded connection between it and the mounting cover 400, the push head 100 will have an upward displacement relative to the mounting cover 400. The limiting member 300 abuts against the first flange 621, preventing the piston rod 620 from having an upward displacement. Since the push head 100 is fixedly connected to the piston rod 620, the push head 100 cannot rise. Thus, when the push head 100 is disturbed by external objects, it cannot rotate, thereby keeping the push head 100 in a pressed state.

[0052] In some embodiments of the present invention, a locking cover 200 is provided at the upper end of the mounting cover 400. The locking cover 200 is rotatable relative to the mounting cover 400. When the locking cover 200 rotates, it drives the limiting member 300 to move between a locked position and a clearance position. It is understood that the rotation of the locking cover 200 to drive the limiting member 300 to move facilitates user operation. Furthermore, the locking cover 200 only drives the limiting member 300 to move when it is subjected to a tangential force and rotates, which can reduce the probability of the push-button 100 popping out due to impact from external objects.

[0053] Specifically, the mounting cover 400 has an annular portion 410 at its upper end, which defines a mounting cavity 420 with an upper opening. A limiting member 300 is disposed within the mounting cavity 420, and a locking cover 200 is fitted around the outer periphery of the annular portion 410 to cover the opening of the mounting cavity 420. It can be understood that the locking cover 200 serves both to drive the limiting member 300 and to cover the mounting cavity 420 to protect the limiting member 300, achieving a dual function and making the pump structure simple and compact. The limiting member 300 is disposed within the mounting cavity 420 to prevent interference from external objects and to improve aesthetics. The locking cover 200 has an outer circumferential surface and is coaxially arranged with the mounting cover 400. This allows the outer circumferential surface to better prevent interference from external objects. In some embodiments, the outer circumferential surface of the locking cover 200 has an anti-slip texture to facilitate rotation of the locking cover 200.

[0054] Reference Figure 5 As shown, in some embodiments of the present invention, the upper end face of the limiting member 300 is provided with a driving groove, and the locking cover 200 has a driving rod 210 extending into the driving groove. When the locking cover 200 rotates, the driving rod 210 slides along the driving groove and abuts against the side wall of the driving groove to drive the limiting member 300 to reciprocate radially along the piston rod 620. The structure is simple and reliable. Furthermore, the radial reciprocating movement of the limiting member 300 along the piston rod 620 can reduce the path of the limiting member 300 between the locked position and the avoidance position.

[0055] Reference Figure 5 As shown, in some embodiments of the present invention, the drive groove is a strip groove 310, which has a first end 311 and a second end 312. The distance between the first end 311 and the axis of the piston rod 620 is less than the distance between the second end 312 and the piston rod 620. When the lock cover 200 rotates to the drive rod 210 at the first end 311, the limiting member 300 moves to the avoidance position; when the lock cover 200 rotates to the drive rod 210 at the second end 312, the limiting member 300 moves to the locking position.

[0056] Specifically, refer to Figure 5 and Figure 7 As shown, the drive rod 210 is integrally formed with the main body of the lock cover 200, extending vertically and into the strip groove 310. The diameter of the drive rod 210 is slightly smaller than the width of the strip hole, so that the drive rod 210 can slide smoothly in the strip groove 310. Specifically, the strip groove 310 is an oblong groove, which is convenient for processing, and the two ends of the oblong groove are rounded to reduce stress.

[0057] Reference Figure 5As shown, the strip groove 310 extends clockwise away from the axis of the piston rod 620. When the lock cover 200 rotates counterclockwise, the drive rod 210 slides along the strip groove 310 and abuts against the side wall of the strip groove 310 away from the piston rod 620, pushing the limiting member 300 to move away from the piston rod 620 to enter the avoidance position. When the lock cover 200 rotates clockwise, the drive rod 210 slides along the strip groove 310 and abuts against the side wall of the strip groove 310 near the piston rod 620, pushing the limiting member 300 to move towards the piston rod 620 to enter the locking position.

[0058] Reference Figure 5 and Figure 6 As shown, in some embodiments of the present invention, the mounting cavity 420 has two spaced-apart limiting plates 430, and a guide groove 440 is defined between the two limiting plates 430. The limiting member 300 is located within the guide groove 440 and slides along the extending direction of the guide groove 440. Specifically, the limiting groove extends radially along the piston rod 620. The guiding effect of the two limiting plates 430 on the limiting member 300 ensures smooth and reliable sliding of the limiting member 300. The limiting plates 430 and the main body of the mounting cover 400 are integrally injection molded, reducing assembly difficulty.

[0059] Reference Figure 6 As shown, in some embodiments of the present invention, the limiting plate 430 is provided with a sliding groove 431 extending along the sliding direction of the limiting member 300. Sliding portions 340 cooperating with the sliding groove 431 are provided on both sides of the limiting member 300 along the sliding direction. The sliding portions 340 are disposed in the sliding groove 431 to restrict the limiting member 300 from disengaging from the guide groove 440. It can be understood that when the limiting member 300 is in the locked position, the spring 500 is compressed, and the spring 500 applies an upward force to the limiting member 300 through the piston rod 620, causing the limiting member 300 to tend to disengage from the guide groove 440. By extending the sliding portion 340 into the sliding groove 431, the disengagement of the limiting member 300 from the guide groove 440 can be restricted, resulting in a simple and reliable structure.

[0060] Reference Figure 6 As shown, in some embodiments of the present invention, the sliding groove 431 extends to the end near the piston rod 620 and passes through the limiting plate 430. This facilitates the installation of the limiting member 300.

[0061] In some embodiments of the present invention, the end face of the limiting member 300 near the piston rod 620 is a first arc surface 320, and the first arc surface 320 is provided with a limiting portion 330. When the limiting member 300 is in the locked position, the limiting portion 330 abuts against the first flange 621. Specifically, the piston rod 620 is cylindrical, and the first arc surface 320 can better fit the piston rod 620, making the overall structure compact. Specifically, the limiting portion 330 is integrally formed with the limiting member 300, and the end of the limiting member 300 near the piston rod 620 is a second arc surface 331. In this way, the limiting member 300 can further fit the piston rod 620, reducing the distance between the limiting member 300 and the piston rod 620, reducing the space required by the limiting member 300, and making the overall structure compact.

[0062] In some embodiments of the present invention, the outer peripheral surface of the annular portion 410 is provided with an annular groove 411 extending circumferentially, and the inner peripheral wall of the lock cover 200 is provided with an annular protrusion 220 extending circumferentially therein. The annular protrusion 220 is engaged in the annular groove 411 to prevent the lock cover 200 from detaching from the mounting cover 400. It can be understood that the lock cover 200 can be installed on the mounting cover 400 by pressing the annular protrusion 220 on the lock cover 200 into the annular groove 411 of the mounting cover 400, which is simple in structure and convenient in installation. Furthermore, the annular flange can slide in the annular groove 411, thereby realizing the rotation of the lock cover 200 relative to the mounting cover 400. In other embodiments, the annular groove 411 is provided on the lock cover 200, and the annular protrusion 220 is provided on the annular portion 410.

[0063] Reference Figure 4 As shown, in some embodiments of the present invention, one of the mounting cover 400 and the locking cover 200 is provided with a limiting protrusion 231, and the other is provided with a limiting groove 450 that cooperates with the limiting protrusion 231. The limiting protrusion 231 is engaged in the limiting groove 450 to stabilize the limiting member 300 in the locked position. In this way, the influence of external interference on the locking cover 200 can be prevented, and the reliability of the limiting member 300 locking the piston rod 620 can be guaranteed.

[0064] Specifically, refer to Figure 7 As shown, the lock cover 200 has a downward extension 230, and the side wall of the downward extension 230 has a vertically extending limiting protrusion 231. A limiting plate 430 has a relief groove 432, and the side wall of the relief groove 432 near the limiting protrusion 231 has a vertically extending limiting groove 450. Thus, when the lock cover 200 is fitted onto the annular portion 410, even with vertical errors, the limiting protrusion and the limiting groove 450 can still engage, providing a limiting effect on the lock cover 200.

[0065] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A push-button pump, characterized in that... ,include: Mounting cover (400) for attachment to container; The main pump (600) is located on the mounting cover (400). The main pump (600) includes a piston rod (620) that can move up and down relative to the mounting cover (400). One end of the piston rod (620) is connected to a piston member (630), and the other end is connected to a push head (100). A limiting member (300) is movably disposed on the mounting cover (400), the limiting member (300) being movable relative to the mounting cover (400) to have a locked position and a clearance position; The piston rod (620) has a first flange (621) extending circumferentially around its outer periphery. When the limiting member (300) is in the locked position, the limiting member (300) abuts against the first flange (621) to prevent the piston rod (620) from moving upward relative to the mounting cover (400). When the limiting member (300) is in the avoidance position, the limiting member (300) avoids the first flange (621) so that the piston rod (620) can rise relative to the mounting cover (400). The mounting cover (400) is provided with a locking cover (200) at its upper end. The locking cover (200) can rotate relative to the mounting cover (400). When the locking cover (200) rotates, it drives the limiting member (300) to move between the locking position and the avoidance position. The upper end face of the limiting member (300) is provided with a driving groove, and the lock cover (200) has a driving rod (210) extending into the driving groove. When the lock cover (200) rotates, the driving rod (210) slides along the driving groove and abuts against the side wall of the driving groove to drive the limiting member (300) to reciprocate radially along the piston rod (620). The drive groove is a strip groove (310), which has a first end (311) and a second end (312). The distance between the first end (311) and the axis of the piston rod (620) is less than the distance between the second end (312) and the axis of the piston rod (620). When the lock cover (200) rotates to the first end (311) of the drive rod (210), the limiting member (300) moves to the avoidance position. When the lock cover (200) rotates to the second end (312) of the drive rod (210), the limiting member (300) moves to the locking position.

2. A push-button pump according to claim 1, characterized in that, The mounting cover has two spaced-apart limiting plates (430), and a guide groove (440) is defined between the two limiting plates (430). The limiting member (300) is located in the guide groove (440) and slides along the extension direction of the guide groove (440).

3. A push-button pump according to claim 2, characterized in that, The limiting plate (430) is provided with a sliding groove (431) extending along the sliding direction of the limiting member (300). The two sides of the limiting member (300) in the sliding direction are provided with sliding parts (340) that cooperate with the sliding groove (431). The sliding parts (340) are provided in the sliding groove (431) to restrict the limiting member (300) from disengaging from the guide groove (440).

4. A push-pump according to claim 3, characterized in that, The sliding groove (431) extends through the limiting plate (430) at one end near the piston rod (620).

5. A push-button pump according to claim 1, characterized in that, The end face of the limiting member (300) near the piston rod (620) is a first arc surface (320), and the first arc surface (320) is provided with a limiting part (330). When the limiting member (300) is in the locked position, the limiting part (330) abuts against the first flange (621).

6. A push-pump according to claim 1, characterized in that, The upper end face of the mounting cover (400) is provided with an annular portion (410), and the outer peripheral surface of the annular portion (410) is provided with an annular groove (411) extending in its circumferential direction. The inner peripheral wall of the lock cover (200) is provided with an annular protrusion (220) extending in its circumferential direction. The annular protrusion (220) is engaged in the annular groove (411) to restrict the lock cover (200) from disengaging from the mounting cover (400).

7. A push-button pump according to claim 1, characterized in that, One of the mounting cover (400) and the locking cover (200) is provided with a limiting protrusion (231), and the other is provided with a limiting groove (450) that cooperates with the limiting protrusion (231). The limiting protrusion (231) is inserted into the limiting groove (450) so that the limiting member (300) is stable in the locked position.

Images