Self-priming non-return propelling paste pump

Abstract

A self-priming non-return propelling paste pump, comprising a bottle body (100), wherein a piston (600) and a rubber cup (300) are provided in the bottle body (100), the rubber cup (300) forms a cup cavity (301) by means of enclosure, and the cup cavity (301) has a top opening and a bottom opening; a paste cavity (101) is provided between the piston (600) and the rubber cup (300); the bottle body (100) is provided with a press head (200), and a liquid output channel (201) is formed in the press head (200); the piston (600) is connected to a non-return member (700) that unidirectionally moves upward in synchronization with the piston (600) and restricts the piston (600) from moving downward; when the press head (200) drives the rubber cup (300) downward to compress and deform, paste in the cup cavity (301) is extruded under pressure from the liquid output channel (201), and the non-return member (700) restricts the piston (600) from moving downward; and when the rubber cup (300) is elastically reset upward, the rubber cup (300) draws the paste upward, the piston (600) synchronously propels the paste upward, the elastic resetting of the rubber cup (300) and the upward propelling of the piston (600) achieve a linkage effect, and the non-return member (700) unidirectionally moves upward in synchronization with the piston (600).

Description

Self-priming check valve propelled ointment pump Technical Field

[0001] This invention patent relates to the technical field of ointment pumps, and more specifically, to a self-priming check valve propulsion ointment pump. Background Technology

[0002] Ointments are widely used in daily life, such as in toothpaste, cosmetics, skincare products, and shampoos. In practice, the ointment is stored in a container, and when needed, it is squeezed out. However, squeezing out the ointment can be somewhat difficult. Technical issues

[0003] In existing technologies, in order to squeeze the ointment out of the container, a straw is placed in the container, and a suction head is connected to the straw. By pressing the suction head, the ointment in the container is sucked out using the straw. However, this method is difficult to achieve efficient dispensing of the ointment, and when the amount of ointment in the container decreases, dispensing often fails, resulting in wasted materials and a poor user experience. Technical solutions

[0004] The purpose of this invention is to provide a self-priming, check-back propulsion ointment pump, which aims to solve the problem of efficient ointment dispensing in the prior art.

[0005] The present invention is implemented as follows: a self-priming check valve propulsion ointment pump includes a bottle body, a piston in the lower part of the bottle body that moves unidirectionally upward under pressure and is connected to atmospheric pressure, and a gelatinous bowl in the upper part of the bottle cavity that elastically deforms and bounces upward to reset. The gelatinous bowl surrounds and forms a bowl cavity for containing ointment. The bowl cavity penetrates the top of the gelatinous bowl to form a top opening, and the bowl cavity penetrates the bottom of the gelatinous bowl to form a bottom opening.

[0006] The piston and the gel bowl have a cavity for containing the ointment. The top of the bottle is provided with a pressing head that compresses and deforms the gel bowl by pressing. The pressing head has a liquid outlet channel with an outlet and an inlet. The inlet communicates with the top opening of the gel bowl. The piston is connected to a check valve that moves upward synchronously with the piston and restricts the piston from moving downward.

[0007] When the pressing head drives the gelatinous bowl downwards to compress and deform, the ointment in the bowl cavity is squeezed out through the liquid outlet, and the check valve restricts the piston from moving downwards; when the gelatinous bowl elastically returns to its original position upwards, the gelatinous bowl self-absorbs the ointment, the piston synchronously pushes the ointment upwards, and the check valve moves upwards in one direction synchronously with the piston.

[0008] Furthermore, the check valve is located below the piston, with the middle part of the check valve protruding upward to form a mounting post, and the bottom of the piston forming a mounting groove. The mounting post is inserted into the slot, thus fixing the check valve and the piston together as a single unit.

[0009] Furthermore, the check valve includes a downward unidirectional swinging and retracting restrictive portion, which is arranged around the middle of the check valve; the outer periphery of the restrictive portion abuts against the inner wall of the bottle body, restricting the piston from moving downward; when the check valve moves upward unidirectionally with the piston, the restrictive portion is squeezed and swings downward unidirectionally.

[0010] The inner wall of the bottle is provided with multiple upward-facing annular steps, which are arranged sequentially at intervals along the height of the bottle and surround the bottle. The outer periphery of the limiting part presses against the annular steps.

[0011] Furthermore, the limiting part includes a plurality of downward unidirectional oscillating elastic fins, which are arranged around the circumference of the check member, and adjacent elastic fins are elastically spaced; the inner end of the elastic fin is fixedly arranged, and the outer end of the elastic fin has a pressing section, which presses against the annular step from top to bottom, thereby restricting the piston from moving downward.

[0012] Furthermore, along the direction from the inside to the outside of the elastic fins, the elastic fins are arranged at a downward inclination, and the pressing section is arranged at a downward inclination, deviating from the arrangement of the elastic fins, and the pressing section and the elastic fins are arranged in a bent shape.

[0013] Furthermore, an elastic sealing film layer is formed on the outer periphery of the piston, the sealing film layer being arranged around the circumference of the piston and extending along the height direction of the piston;

[0014] The middle part of the sealing film layer is fixedly connected to the outer periphery of the piston. The upper part of the sealing film layer extends upward to form an upper section surrounding the outer periphery of the piston, and the lower part of the sealing film layer extends downward to form a lower section arranged around and located below the piston. The top of the upper section abuts against the inner wall of the bottle from bottom to top, and the bottom of the lower section abuts against the inner wall of the bottle from top to bottom, sealing the bottom of the ointment cavity.

[0015] Furthermore, the upper section, the lower section, and the inner wall of the bottle form a closed elastic region, which is arranged around the piston circumferentially; the upper section and the outer periphery of the piston form an open-top annular region, which is arranged around the piston circumferentially.

[0016] Furthermore, the elastic interval is provided with two intersecting and elastically arranged limiting sections. The two ends of the limiting sections are respectively connected to the sides of two adjacent elastic fins. The elastic fins are arranged in an inclined manner in the elastic interval. The middle parts of the two limiting sections are intersected and connected to form an intersecting position. The intersecting position is provided with a hollow hole that runs through the top and bottom.

[0017] Furthermore, the inner side of the elastic fin has a downward-facing sidewall, and the interior of the elastic fin is provided with a plurality of arc-shaped holes in the shape of arc strips. The plurality of arc-shaped holes are arranged in sequence and nested at intervals. The two ends of the arc-shaped holes respectively penetrate the downward-facing sidewall, and the middle part of the arc-shaped holes deviates from the downward-facing sidewall and bends upward in an arc shape.

[0018] Furthermore, the gelatinous bowl has an annular inner wall facing the bowl cavity, the annular inner wall being arranged around the circumference of the bowl cavity, and the annular inner wall being convex and curved upward along the height direction of the annular inner wall;

[0019] The arc-shaped inner wall is provided with a plurality of rebound ribs, which are arranged around the circumference of the bowl cavity at intervals. The rebound ribs extend along the height direction of the annular inner wall, and a guide gap is formed between adjacent rebound ribs. The guide gap guides the ointment in the bowl cavity to be squeezed upward. The guide gap gradually decreases in size along the direction from bottom to top.

[0020] The middle part of the rebound rib is fixedly connected to the inner wall of the ring. There is an upper gap between the upper part of the rebound rib and the inner wall of the ring, and a lower gap between the lower part of the rebound rib and the inner wall of the ring. Beneficial effects

[0021] Compared with the prior art, the self-priming check valve propulsion ointment pump provided by the present invention, when the pressing head presses against the plastic bowl and compresses and deforms it, the ointment in the bowl cavity is squeezed and discharged from the outlet channel. When it is freed from the pressure on the plastic bowl, the plastic bowl elastically returns to its upward position, self-priming the ointment in the ointment cavity upward, and the piston propels the ointment upward. The elastic return of the plastic bowl and the upward propulsion of the piston form a linkage effect, so that the ointment fills the ointment cavity. Furthermore, when the piston moves upward, the check valve restricts the piston from moving downward, achieving efficient ointment discharge, and is easy to operate with a strong user experience. Attached Figure Description

[0022] Figure 1 is a three-dimensional schematic diagram of the self-priming check valve propulsion ointment pump provided by the present invention;

[0023] Figure 2 is a partial exploded three-dimensional schematic diagram of the self-priming anti-reverse propulsion ointment pump provided by the present invention.

[0024] Figure 3 is a cross-sectional schematic diagram of the self-priming check valve propulsion ointment pump provided by the present invention;

[0025] Figure 4 is an enlarged view of point A in Figure 3;

[0026] Figure 5 is a front view schematic diagram of the two restrictive segments arranged in an intersecting manner provided by the present invention;

[0027] Figure 6 is a schematic diagram of the internal structure of the elastic fin provided by the present invention;

[0028] Figure 7 is a cross-sectional schematic diagram of the gelatinous bowl provided by the present invention. The best embodiment of the present invention

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0030] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0031] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0032] Referring to Figures 1-7, a preferred embodiment of the present invention is provided.

[0033] The self-priming check valve propulsion ointment pump includes a bottle body 100. The lower part of the bottle body 100 has a piston 600 that moves upward under pressure and is connected to atmospheric pressure. That is to say, under atmospheric pressure, the piston 600 can only move upward and cannot move downward.

[0034] The paste or liquid mentioned here refers to a substance with a certain consistency, such as toothpaste, cosmetics, skin care products, and shampoo, and is not limited to a specific substance.

[0035] The upper part of the bottle cavity has a gelatinous bowl 300 that can elastically deform and spring back to its original position. The gelatinous bowl 300 surrounds and forms a bowl cavity 301 that contains the ointment. The bowl cavity 301 penetrates the top of the gelatinous bowl 300 to form a top opening, and the bowl cavity 301 penetrates the bottom of the gelatinous bowl 300 to form a bottom opening.

[0036] A liquid cavity 101 for containing the ointment is provided between the piston 600 and the gel bowl 300. The top of the bottle body 100 is provided with a pressing head 200 that compresses and deforms the gel bowl 300 by pressing. A liquid outlet 201 is formed in the pressing head 200, which has a liquid outlet 202 and a liquid inlet. The liquid inlet communicates with the top opening of the gel bowl 300. The piston 600 is connected to a check valve 700 that moves upward synchronously with the piston 600 and restricts the downward movement of the piston 600.

[0037] When the pressing head 200 drives the gelatinous bowl 300 downward to compress and deform, the ointment in the bowl cavity 301 is squeezed out through the liquid outlet 201, and the check valve 700 restricts the piston 600 from moving downward. At this time, the position of the piston 600 is fixed. When the gelatinous bowl 300 elastically returns to its original position upward, the gelatinous bowl 300 self-absorbs the ointment upward, and the piston 600 synchronously pushes the ointment upward. The check valve 700 moves upward in one direction synchronously with the piston 600.

[0038] When the gel bowl 300 elastically returns to its upward position, a vacuum region is generated in the bowl cavity 301. At the same time, the elastic return of the gel bowl 300 upward creates a self-suction effect on the ointment, allowing the ointment in the ointment cavity 101 to enter the bowl cavity 301. Under the action of atmospheric pressure, the piston 600 moves upward in one direction, pushing the ointment in the ointment cavity 101 into the bowl cavity 301 until the gel bowl 300 is completely returned to its original position and there is no vacuum region in the bowl cavity 301.

[0039] The self-priming check valve propulsion ointment pump described above, when the pressing head 200 presses against the gel bowl 300 and compresses and deforms it, the ointment in the bowl cavity 301 is squeezed and discharged from the outlet channel 201. After the pressure on the gel bowl 300 is released, the gel bowl 300 elastically returns to its upward position, self-priming the ointment in the ointment cavity 101 upward, and the piston 600 pushes the ointment upward. The elastic return of the gel bowl 300 and the upward push of the piston 600 form a linkage effect, so that the ointment fills the ointment cavity 101. Furthermore, when the piston 600 moves upward, the check valve 700 restricts the piston 600 from moving downward, achieving efficient ointment discharge, and is easy to operate with a strong user experience.

[0040] In addition, due to the setting of the check valve 700, the piston 600 can only move upward in one direction, which restricts the piston 600 from moving downward. When the pressing head 200 presses downward, the position of the piston 600 is fixed, preventing the paste from moving downward, thereby ensuring that the paste is better squeezed into the liquid outlet 201.

[0041] In this embodiment, the check valve 700 is located below the piston 600 and is integrated with the piston 600. In this way, the check valve 700 can support the piston 600 upwards and better restrict the piston 600 from moving downwards.

[0042] In order to achieve a better connection between the check valve 700 and the piston 600, the middle part of the check valve 700 is inserted into the piston 600 and fixedly connected to the piston 600 as a whole.

[0043] In this embodiment, the middle part of the check valve 700 protrudes upward to form a mounting post 704, and the bottom of the piston 600 forms a mounting groove. The mounting post 704 is inserted into the groove, fixing the check valve 700 and the piston 600 together. The assembly of the piston 600 and the check valve 700 is relatively convenient through the cooperation between the mounting post 704 and the groove.

[0044] In this embodiment, the check valve 700 includes a downward unidirectional swinging and retracting limiting part, which is arranged around the middle of the check valve 700; the outer periphery of the limiting part abuts against the inner wall of the bottle body 100, limiting the piston 600 to move downward. When the check valve 700 moves upward unidirectionally with the piston 600, the limiting part is squeezed and swings downward unidirectionally to retract.

[0045] The inner wall of the bottle body 100 is provided with multiple upward-facing annular steps 102. The multiple annular steps 102 are arranged sequentially at intervals along the height direction of the bottle body 100. The annular steps 102 are arranged around the circumference of the bottle body 100, and the outer periphery of the limiting part presses against the annular steps 102.

[0046] When piston 600 moves upward in one direction, check valve 700 moves upward synchronously with piston 600. Constrained by the inner wall of bottle 100, the limiting part swings downward and retracts, thus enabling check valve 700 to move upward in one direction. When piston 600 is under pressure from the ointment and tends to move downward, the limiting part abuts against the annular step 102 of bottle 100, providing support and constraint for piston 600. At this time, the limiting part cannot swing upward, thus restricting piston 600 from moving downward.

[0047] In this embodiment, the limiting part includes a plurality of downwardly unidirectionally swinging elastic fins 701, which are arranged circumferentially around the check member 700, with an elastic gap 703 between adjacent elastic fins 701. The inner ends of the elastic fins 701 are fixedly arranged, and the outer ends of the elastic fins 701 abut against the inner sidewall of the bottle body 100. The outer ends of the elastic fins 701 have a pressing section 702, which presses against the annular step 102 from top to bottom, limiting the downward movement of the piston 600.

[0048] By forming multiple elastic fins 701, the inner wall of the bottle body 100 is abutted at multiple positions and at intervals along the circumference of the bottle body 100. When the piston 600 moves upward, the multiple elastic fins 701 can swing downward elastically, which makes it easy for the piston 600 and the check piece 700 to move upward synchronously. When the piston 600 moves downward, the multiple positions of the elastic fins 701 abutting and restricting can better limit the downward movement of the piston 600.

[0049] By setting an annular step 102, and with the pressing section 702 pressing against the annular step 102, the multiple elastic fins 701 can better support the piston 600 and better restrict the downward movement of the piston 600. In addition, between adjacent annular steps 102, an inclined guide surface 103 is formed. The guide surface 103 is arranged around the circumference of the bottle body 100 and is inclined inward in the direction from bottom to top. In this way, when the piston 600 moves upward and the check element 700 moves upward simultaneously, under the guidance of the guide surface 103, the elastic fins 701 are driven to elastically swing and retract downward, thereby allowing the elastic fins 701 to move upward to another annular step 102.

[0050] In this embodiment, the elastic fin 701 is arranged inclined downwards along the direction from the inside out. This allows the elastic fin 701 to swing downwards while restricting its upward swing. The pressing section 702 is also arranged inclined downwards and is offset from the elastic fin 701. Furthermore, the pressing section 702 and the elastic fin 701 are arranged in a bent manner. This allows the pressing section 702 to better press against the annular step 102. Additionally, the bent arrangement between the pressing section 702 and the elastic fin 701 restricts the upward swing deformation of the elastic fin 701 when subjected to downward pressure, thereby limiting the downward movement of the piston 600.

[0051] In this embodiment, an elastic sealing film layer is formed on the outer periphery of the piston 600. The sealing film layer is arranged around the circumference of the piston 600 and extends along the height direction of the piston 600. The middle part of the sealing film layer is fixedly connected to the outer periphery of the piston 600. The upper part of the sealing film layer extends upward to form an upper section 601 surrounding the outer periphery of the piston 600, and the lower part of the sealing film layer extends downward to form a lower section 603 arranged around the piston 600 and located below the piston 600. The top of the upper section 601 abuts against the inner wall of the bottle 100 from bottom to top, and the bottom of the lower section 603 abuts against the inner wall of the bottle 100 from top to bottom, sealing the bottom of the ointment cavity 101.

[0052] By arranging a sealing film layer, the upper section 601 and the lower section 603 can be in contact with the inner wall of the bottle body 100 at two positions, which can better seal the bottom of the ointment cavity 101. Secondly, while maintaining a better seal for the piston 600, arranging a sealing film layer can facilitate the piston 600 to move upward in the bottle body 100.

[0053] In this embodiment, the upper section 601, the lower section 603, and the inner wall of the bottle body 100 form a closed elastic region 604. The elastic region 604 is arranged around the piston 600 in a circumferential manner. That is, the above-mentioned elastic region 604 is formed between the middle of the sealing film layer and the inner wall of the bottle body 100. In this way, while the sealing film layer is sealing, it can also ensure the elastic deformation of the sealing film layer during the movement on the inner wall of the bottle body 100, so that the piston 600 can move upward.

[0054] In this embodiment, the upper section 601 and the outer periphery of the piston 600 enclose an annular region 602 with an open top, and the annular region 602 is arranged around the circumference of the piston 600. The annular region 602 communicates with the ointment cavity 101. The ointment in the ointment cavity 101 is embedded and fills the annular region 602, and forms an outwardly expanding pressure on the upper section 601 and the outer periphery of the piston 600.

[0055] When the piston 600 moves upward under atmospheric pressure, it will squeeze and push the ointment. At this time, the ointment in the annular region 602 increases the expansion pressure on the upper section 601 and the outer periphery of the piston 600. This can make the upper section 601 better press against the inner wall of the bottle 100, thus preventing the ointment in the ointment cavity 101 from leaking downward.

[0056] In this embodiment, the elastic interval 703 is provided with two intersecting and elastically arranged limiting sections 705. The two ends of the limiting sections 705 are respectively connected to the sides of two adjacent elastic fins 701. The elastic fins 701 are arranged in an inclined manner in the elastic interval 703, and the middle parts of the two limiting sections 705 are intersecting and connected as one unit.

[0057] Two limiting sections 705 are arranged in the elastic interval 703 to restrict the upward swing of the elastic fins 701. This further restricts the possibility of the check element 700 moving downward and limits the range of downward swing of the elastic fins 701. When atmospheric pressure pushes the piston 600, the check element 700 moves upward synchronously and forms a certain frictional force with the inner wall of the bottle 100, keeping the piston 600 moving upward slowly to achieve the stability and uniformity of the ointment discharge.

[0058] In this embodiment, the inner side of the elastic fin 701 has a downwardly arranged sidewall 709, and the interior of the elastic fin 701 is provided with a plurality of arc-shaped holes 708. The plurality of arc-shaped holes 708 are arranged in sequence and nested at intervals. The two ends of the arc-shaped holes 708 respectively penetrate the downwardly arranged sidewall 709, and the middle part of the arc-shaped holes 708 deviates from the downwardly arranged sidewall 709 and bends upward in an arc shape.

[0059] By arranging multiple arc-shaped holes 708 with the center of the arc-shaped holes 708 arched upwards, when the piston 600 moves upwards and drives the check element 700 to move upwards simultaneously, multiple elastic fins 701 can swing downwards and retract, so that the check element 700 can move upwards.

[0060] When the piston 600 is subjected to downward pressure, the arrangement of multiple arc-shaped holes 708 can enhance the rigidity of the upward swing of the elastic fin 701, restrict the upward swing of the elastic fin 701, thereby preventing the elastic fin 701 from disengaging from the annular step 102 and restricting the piston 600 from moving downward.

[0061] In this embodiment, the gelatinous bowl 300 has an annular inner wall facing the bowl cavity 301. The annular inner wall is arranged around the circumference of the bowl cavity 301, and along the height direction of the annular inner wall, the annular inner wall is convex and curved upwards in an annular shape.

[0062] Multiple rebound ribs 900 are raised on the arc-shaped inner wall. The multiple rebound ribs 900 are arranged around the circumference of the bowl cavity 301 at intervals. The rebound ribs 900 extend along the height direction of the annular inner wall. A guide gap is formed between adjacent rebound ribs 900. The guide gap guides the ointment in the bowl cavity 301 to be squeezed upward. The guide gap gradually decreases in the direction from bottom to top.

[0063] The middle part of the rebound rib 900 is fixedly connected to the inner wall of the ring. There is an upper gap 903 between the upper part of the rebound rib 900 and the inner wall of the ring, and a lower gap 902 between the lower part of the rebound rib 900 and the inner wall of the ring.

[0064] By arranging the spring ribs 900 with the middle part of the spring ribs 900 arching upwards, when the colloid bowl 300 is compressed and deformed downwards under pressure, after the pressure on the colloid bowl 300 is released, the elasticity of the colloid bowl 300 itself and the rebound effect of the spring ribs 900 can make the colloid bowl 300 quickly and elastically return to its original position upwards.

[0065] Furthermore, a guide gap is formed between adjacent rebound ribs 900, which can guide the ointment to move upward from bottom to top, and when the gel bowl 300 is compressed, it can guide the ointment in the bowl cavity 301 into the top opening, and then into the liquid outlet channel 201.

[0066] By forming the upper gap 903 and the lower gap 902, the elastic compression deformation of the upper and lower parts of the colloid bowl 300 can be increased. The middle part of the rebound rib 900 is connected to the inner wall of the ring, which can enhance the elastic recovery ability of the middle part of the colloid bowl 300 and simultaneously drive the elastic recovery of the upper and lower parts of the colloid bowl 300.

[0067] In this embodiment, the top of the colloid bowl 300 and the pressing head 200 are fixed together by an insert, so that the elastic movement of the colloid bowl 300 is consistent with the movement of the pressing head 200. When the pressing head 200 presses down, the colloid bowl 300 is compressed and deformed synchronously. When the pressing head 200 is released, the colloid bowl 300 elastically returns to its original position, which drives the pressing head 200 to move upward.

[0068] In this embodiment, the gelatinous bowl 300 is conical in shape, and its diameter gradually increases from top to bottom. The bottom opening of the gelatinous bowl 300 is open. This allows the ointment in the bowl cavity 301 to be squeezed into the outlet channel 201 when the bowl 300 is compressed and deformed. When the bowl 300 elastically returns to its upward position, it facilitates quick and accurate repositioning. Furthermore, the open bottom opening allows for self-absorption of the ointment in the ointment cavity 101 when the bowl 300 elastically returns to its upward position, and also facilitates the entry of the ointment from the ointment cavity 101 into the bowl cavity 301.

[0069] In this embodiment, the bottom of the gelatinous bowl 300 is fixedly arranged, while the middle part of the gelatinous bowl 300 is movably arranged. This allows the gelatinous bowl 300 to be compressed and deformed while maintaining its fixed bottom, facilitating the entry of the ointment in the bowl cavity 301 into the outlet channel 201. When the gelatinous bowl 300 elastically returns to its upward position, rapid repositioning can be achieved.

[0070] In this embodiment, a downward-opening one-way valve 304 is provided in the top opening. When the pressing head 200 drives the gel bowl 300 downward to compress and deform, the upper one-way valve 304 opens, and the bowl cavity 301 communicates with the liquid outlet channel 201, so that the ointment in the bowl cavity 301 can enter the liquid outlet channel 201. Secondly, when the pressing head 200 is released, during the process of the gel bowl 300 elastically returning to its upward position, the upper one-way valve 304 closes. At this time, the bowl cavity 301 and the liquid outlet channel 201 are arranged separately. Due to the vacuum area in the bowl cavity 301, the piston 600 pushes upward, and the gel bowl 300 self-absorbs the ointment, so that the ointment in the ointment cavity 101 can quickly enter the bowl cavity 301, so that the gel bowl 300 can quickly and elastically return to its original position. During this process, the ointment in the bowl cavity 301 will not continue to enter the liquid outlet channel 201.

[0071] In this embodiment, a partition layer 400 is provided below the gel bowl 300, which separates the bottom opening from the ointment cavity 101. The partition layer 400 is provided with a one-way valve 401 that opens upwards. When the gel bowl 300 elastically returns to its upward position, the one-way valve 401 opens, and the ointment cavity 101 communicates with the bottom opening.

[0072] In this way, when the pressing head 200 presses down to compress and deform the gel bowl 300, the lower one-way valve 401 is closed, and the bowl cavity 301 and the ointment cavity 101 are separated. When the ointment in the bowl cavity 301 is squeezed, the ointment in the bowl cavity 301 is prevented from moving downward. In this way, the liquid outlet 201 can be quickly discharged and the discharge can be kept stable. When the gel bowl 300 is elastically reset upward, the lower one-way valve 401 is opened, so that the ointment in the ointment cavity 101 can enter the bowl cavity 301.

[0073] Of course, for some pastes with higher viscosity, it is not necessary to set the lower one-way valve 401, while for some pastes with lower viscosity, it is necessary to set the lower one-way valve 401. Here, viscosity refers to the fluidity of the paste, and the specific viscosity value can be determined according to the actual experiment.

[0074] In this embodiment, a support platform 500 is provided below the gelatinous bowl 300. The support platform 500 is fixed relative to the bottle body 100, and a through hole 501 is provided in the support platform 500. A lower one-way valve 401 is provided on the support platform 500, and the lower one-way valve 401 is aligned vertically with the through hole 501. By arranging the support platform 500, the partition layer 400 can be stably installed, and the position of the partition layer 400 can be kept fixed.

[0075] In this embodiment, the bottom of the bottle body 100 is provided with a bottom shell 800, which is located below the piston 600. The bottom shell 800 is provided with a bottom hole 801 arranged vertically through the bottom. The external atmospheric pressure is connected to the piston 600 through the bottom hole 801. In this way, when the gelatinous bowl 300 elastically returns to its upward position, a vacuum area appears in the bowl cavity 301, which is in a negative pressure state. The external atmospheric pressure drives the piston 600 to move upward through the bottom hole 801.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-priming, check valve-driven ointment pump, characterized in that, The device includes a bottle body, a piston in the lower part of the bottle body that moves unidirectionally upward under pressure and is connected to atmospheric pressure, and a gelatinous bowl in the upper part of the bottle cavity that elastically deforms and bounces upward to reset. The gelatinous bowl surrounds and forms a bowl cavity containing a paste liquid. The bowl cavity penetrates the top of the gelatinous bowl to form a top opening, and the bowl cavity penetrates the bottom of the gelatinous bowl to form a bottom opening. The piston and the gel bowl have a cavity for containing the ointment. The top of the bottle is provided with a pressing head that compresses and deforms the gel bowl by pressing. The pressing head has a liquid outlet channel with an outlet and an inlet. The inlet communicates with the top opening of the gel bowl. The piston is connected to a check valve that moves upward synchronously with the piston and restricts the piston from moving downward. When the pressing head drives the gelatinous bowl downwards to compress and deform, the ointment in the bowl cavity is squeezed out through the liquid outlet, and the check valve restricts the piston from moving downwards; when the gelatinous bowl elastically returns to its original position upwards, the gelatinous bowl self-absorbs the ointment, the piston synchronously pushes the ointment upwards, and the check valve moves upwards in one direction synchronously with the piston.

2. The self-priming check valve propulsion ointment pump as described in claim 1, characterized in that, The check valve is located below the piston. The middle part of the check valve protrudes upward to form a mounting post. The bottom of the piston forms a mounting groove. The mounting post is inserted into the groove, thus fixing the check valve and the piston together as a whole.

3. The self-priming, check-back propulsion ointment pump as described in claim 1, characterized in that, The check valve includes a downward unidirectional swinging and retracting restrictive portion, which is arranged around the middle of the check valve; the outer periphery of the restrictive portion abuts against the inner wall of the bottle body, restricting the piston from moving downward; when the check valve moves upward unidirectionally with the piston, the restrictive portion is squeezed and swings downward unidirectionally. The inner wall of the bottle is provided with multiple upward-facing annular steps, which are arranged sequentially at intervals along the height of the bottle and surround the bottle. The outer periphery of the limiting part presses against the annular steps.

4. The self-priming check valve propulsion ointment pump as described in claim 3, characterized in that, The limiting part includes a plurality of downward unidirectional oscillating elastic fins, which are arranged around the circumference of the check member and are elastically spaced apart from each other. The inner ends of the elastic fins are fixedly arranged, and the outer ends of the elastic fins have a pressing section that presses against the annular step from top to bottom, thereby restricting the piston from moving downward.

5. The self-priming check valve propulsion ointment pump as described in claim 4, characterized in that, Along the direction from the inside out of the elastic fins, the elastic fins are arranged at an angle downwards, and the pressing section is arranged at an angle downwards, deviating from the arrangement of the elastic fins, and the pressing section and the elastic fins are arranged in a bent shape.

6. The self-priming check valve propulsion ointment pump as described in any one of claims 1 to 5, characterized in that, An elastic sealing film layer is formed on the outer periphery of the piston, the sealing film layer is arranged around the piston circumferentially and extends along the height direction of the piston; The middle part of the sealing film layer is fixedly connected to the outer periphery of the piston. The upper part of the sealing film layer extends upward to form an upper section surrounding the outer periphery of the piston, and the lower part of the sealing film layer extends downward to form a lower section arranged around and located below the piston. The top of the upper section abuts against the inner wall of the bottle from bottom to top, and the bottom of the lower section abuts against the inner wall of the bottle from top to bottom, sealing the bottom of the ointment cavity.

7. The self-priming check valve propulsion ointment pump as described in claim 6, characterized in that, The upper section, the lower section, and the inner wall of the bottle form a closed elastic region, which is arranged around the circumference of the piston; the upper section and the outer periphery of the piston form an open-top annular region, which is arranged around the circumference of the piston.

8. The self-priming check valve propulsion ointment pump as described in claim 3 or 4, characterized in that, The elastic interval has two intersecting and elastically arranged limiting sections. The two ends of the limiting sections are respectively connected to the sides of two adjacent elastic fins. The elastic fins are arranged in an inclined manner in the elastic interval. The middle of the two limiting sections are intersected and connected to form an intersecting position. The intersecting position has a hollow hole that runs through the top and bottom.

9. The self-priming check valve propulsion ointment pump as described in claim 3 or 4, characterized in that, The inner side of the elastic fin has a downward-facing sidewall, and the interior of the elastic fin has a plurality of arc-shaped holes. The plurality of arc-shaped holes are arranged in sequence and nested at intervals. The two ends of the arc-shaped holes pass through the downward-facing sidewall, and the middle part of the arc-shaped holes deviates from the downward-facing sidewall and curves upward.

10. The self-priming, check-back propulsion ointment pump as described in any one of claims 1 to 5, characterized in that, The gelatinous bowl has an annular inner wall facing the bowl cavity, the annular inner wall being arranged around the circumference of the bowl cavity, and the annular inner wall being convex and curved upward along the height direction of the annular inner wall; The arc-shaped inner wall is provided with a plurality of rebound ribs, which are arranged around the circumference of the bowl cavity at intervals. The rebound ribs extend along the height direction of the annular inner wall, and a guide gap is formed between adjacent rebound ribs. The guide gap guides the ointment in the bowl cavity to be squeezed upward. The guide gap gradually decreases in size along the direction from bottom to top. The middle part of the rebound rib is fixedly connected to the inner wall of the ring. There is an upper gap between the upper part of the rebound rib and the inner wall of the ring, and a lower gap between the lower part of the rebound rib and the inner wall of the ring.

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