Anti-overflow pump
By designing the piston structure and one-way valve of the anti-overflow pump, the problem of liquid overflow is solved, and the anti-overflow effect during transportation and normal use are achieved.
Patent Information
- Application Number
- CN202422578933.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-10-24
AI Technical Summary
When the existing compression pump is inverted, liquid easily overflows from the air supply hole, affecting the user experience.
An anti-overflow pump is designed. When the push head is in the pressed state, the small piston blocks the air supply hole to ensure that the liquid does not overflow. When the push head is in the pop-up state, the small piston moves above the air supply hole, and cooperates with the large piston and one-way valve structure to achieve normal use of the liquid.
Prevent liquid spillage during transportation, ensure the integrity of the product appearance, and ensure normal operation during use, avoiding incorrect assembly direction of the small piston.
Smart Images
Figure CN223417491U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of liquid packaging bottles, in particular to an anti-overflow pump. Background Art
[0002] Existing pumps typically have an air vent on the body. This vent balances the air pressure inside the bottle and the pump during pumping, ensuring smooth pumping. However, if the bottle is inverted, the liquid inside can overflow through the vent into the pump, and then out of the pump. This leaking liquid can negatively impact the user's perception of the product.
[0003] Therefore, the existing technology needs to be improved. Utility Model Content
[0004] In order to solve the above technical problems, the purpose of the present utility model is to provide an anti-overflow pump that can prevent liquid from overflowing from the air replenishing hole during transportation.
[0005] The technical solution adopted by the present invention to solve the problem is: an anti-overflow pump, comprising a main body and a main column, the main column and the main body are connected by a spring, an air supply hole is provided on the main body, a pressing head is fixedly connected to the top of the main column, a tooth cover is connected to the top of the body, the main column is passed through the center of the tooth cover, the pressing head includes a pop-up state and a downward pressing state, a small piston and a large piston are sequentially installed on the main column from top to bottom, the small piston and the large piston are both connected to the inner wall of the body for upward and downward sliding, and the shape of the small piston is symmetrical; when the pressing head is in the downward pressing state, the small piston blocks the inner end of the air supply hole, and when the pressing head is in the pop-up state, the small piston is arranged above the air supply hole.
[0006] As a further improvement of the above technical solution, an inner mounting portion is provided at the center of the tooth cover, and an accommodating space is formed between the inner mounting portion and the air supply hole. When the push head is in a pop-up state, the small piston is arranged in the accommodating space.
[0007] As a further improvement of the above technical solution, the small piston is annular, and includes an outer ring part, a connecting part and an inner ring part connected in sequence. The cross-section of the outer ring part is an arc with a concave middle part. The inner ring part is sleeved on the main column, and the connecting part is provided with a through hole.
[0008] As a further improvement of the above technical solution, a step is provided at the upper end of the large piston, and the step abuts against the bottom of the outer ring portion. When the push head changes from a pressed state to a pop-up state, the large piston pushes the small piston upward through the step.
[0009] As a further improvement of the above technical solution, the large piston and the main column are integrally formed, and a liquid inlet hole is provided on the main column, and the liquid inlet hole is provided below the large piston.
[0010] As a further improvement of the above technical solution, a one-way valve is provided in the main column, and the one-way valve includes an elastic part and a sealing head. A sealing slope is provided in the main column, and the sealing head abuts against the sealing slope. The elastic part is provided on the upper side of the sealing head and connected to the inner wall of the main column.
[0011] As a further improvement of the above technical solution, the upper end of the main column is provided with an external thread, and the inner mounting portion is provided with an internal thread, and the external thread is adapted to the internal thread.
[0012] The beneficial effects of the utility model are:
[0013] During transportation, when the pump is not in use, the push head is in a downwardly pressed state, and the small piston blocks the inner end of the air-filling hole to prevent the liquid in the packaging bottle from overflowing from the air-filling hole into the main body;
[0014] Since the shape of the small piston is symmetrical up and down, it can prevent the small piston from being installed in the wrong direction during the assembly of this product. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The present invention will be further explained below with reference to the accompanying drawings and specific implementation methods.
[0016] Figure 1 This is a cross-sectional view of the push head of the utility model when it is in a pressed state;
[0017] Figure 2 This is a cross-sectional view of the push button of the utility model when it is in the pop-up state;
[0018] Figure 3 It is a three-dimensional diagram of the small piston of the present utility model.
[0019] In the figure: 1-main body, 11-air supply hole, 2-main column, 21-sealing slope, 22-external thread, 23-liquid inlet hole, 3-press head, 4-small piston, 41-outer ring part, 42-inner ring part, 43-through hole, 5-tooth cover, 51-inner mounting part, 52-inner thread, 6-large piston, 61-step, 7-one-way valve, 71-elastic part, 72-blocking head, 8-spring. DETAILED DESCRIPTION
[0020] The detailed embodiments of the utility model will be described in this part, the preferred embodiment of the utility model is shown in the drawings, the role of the drawings is to supplement the description of the written part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.
[0021] In the description of the utility model, it needs to be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc.
[0022] In the description of the utility model, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than, etc.
[0023] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection, etc.
[0024] Referring to Figures 1 to 3 A kind of anti-overflow pump, including body 1 and main column 2, the main column 2 and the body 1 are connected by spring 8, the body 1 is equipped with air hole 11, the main column 2 top is fixedly connected with press head 3, the body 1 top is connected with tooth cover 5, the main column 2 is arranged in the center of tooth cover 5, the press head 3 includes pop state and press-down state, the main column 2 is sequentially installed with small piston 4 and big piston 6 from top to bottom, the small piston 4 and big piston 6 are all slidably connected with the inner wall of the body 1, the shape of the small piston 4 is symmetrical up and down;When the press head 3 is in press-down state, the small piston 4 blocks the inner end of air hole 11, when the press head 3 is in pop state, the small piston 4 is arranged above air hole 11.
[0025] As Figure 1 In the transportation process, when the pump has not started to use, press head 3 is in press-down state, the small piston 4 blocks the inner end of air hole 11, and big piston 6 is below small piston 4. Figure 2, after use, the head 3 is in the pop state, the main column 2 and the large piston 6 up in the process of pushing the small piston 4 to the top of the air hole 11. After the small piston 4 is pushed to the top of the air hole 11, the anti-overflow liquid pump can be used normally as in the prior art. As in the prior art, when the head 3 is in the pop state, the large piston 6 blocks the air hole 11, the head 3 is pressed, the large piston 6 moves down, the air hole 11 supplies gas to the upper part of the large piston 6, the large piston can move down smoothly, the head 3 is released, the large piston 6 moves up under the action of the spring 8, the negative pressure is generated in the lower part of the body 1, the liquid in the packaging bottle moves up, the gas above the large piston 6 enters the packaging bottle from the air hole 11. Due to the symmetrical shape of the small piston 4, the small piston 4 can be prevented from being installed in the wrong direction during assembly of the product.
[0026] In a preferred embodiment, the center of the tooth cover 5 is provided with an inner mounting part 51, and a containing space is formed between the inner mounting part 51 and the air hole 11. When the head 3 is in the pop state, the small piston 4 is arranged in the containing space. The small piston is arranged in the containing space to avoid blocking the air hole 11.
[0027] In a preferred embodiment, the small piston 4 is annular, and the small piston 4 comprises an outer ring part 41, a connecting part and an inner ring part 42 connected in sequence. The cross section of the outer ring part 41 is arc-shaped with a concave middle part. The inner ring part 42 is sleeved on the main column 2. The connecting part is provided with a through hole 43. After the anti-overflow liquid pump is started, in the process of moving the large piston 6 up and down, in order to prevent the small piston 4 from moving with the large piston, the through hole 43 is arranged on the small piston 4 to prevent the small piston 4 from forming a pressure difference in the up-down direction.
[0028] In a preferred embodiment, the upper end of the large piston 6 is provided with a step 61, and the step 61 abuts against the bottom of the outer ring part 41. In the process of changing the head 3 from the pressed state to the pop state, the large piston 6 pushes the small piston 4 up through the step 61. The step 61 structure can improve the stability of the abutting relationship between the large piston 6 and the small piston 4, and prevent slipping.
[0029] In a preferred embodiment, the large piston 6 is integrally formed with the main column 2, and the main column is provided with a liquid inlet hole 23 arranged below the large piston 6. This structure reduces the assembly workload of the anti-overflow liquid pump product.
[0030] In a preferred embodiment, the main column 2 is provided with a one-way valve 7, and the one-way valve 7 comprises an elastic part 71 and a blocking head 72. The main column 2 is provided with a sealing slope 21, and the blocking head 72 abuts against the sealing slope 21. The elastic part 71 is arranged on the upper side of the blocking head 72 and connected with the inner wall of the main column 2.
[0031] In a preferred embodiment, the upper end of the main column 2 is provided with an external thread 22, and the inner mounting portion 51 is provided with an internal thread 52, and the external thread 22 is adapted to the internal thread 52. During transportation, the external thread 22 is connected with the internal thread 52, which can prevent the button 3 from automatically popping out.
[0032] The above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or directly or indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. An anti-overflow pump, comprising a body (1) and a main column (2), wherein the main column (2) and the body (1) are connected by a spring (8), an air supply hole (11) is provided on the body (1), a pressing head (3) is fixedly connected to the top of the main column (2), a tooth cover (5) is connected to the top of the body (1), the main column (2) is passed through the center of the tooth cover (5), the pressing head (3) includes a pop-up state and a pressed-down state, and is characterized in that: A small piston (4) and a large piston (6) are sequentially mounted on the main column (2) from top to bottom. The small piston (4) and the large piston (6) are both slidably connected to the inner wall of the body (1) in an up-and-down manner. The shape of the small piston (4) is symmetrical in the up-and-down direction. When the pressing head (3) is in a downward pressing state, the small piston (4) blocks the inner end of the air supply hole (11); when the pressing head (3) is in an ejecting state, the small piston (4) is located above the air supply hole (11).
2. The anti-overflow pump according to claim 1, characterized in that: An inner mounting portion (51) is provided at the center of the tooth cover (5), and an accommodating space is formed between the inner mounting portion (51) and the air supply hole (11). When the pressing head (3) is in a pop-up state, the small piston (4) is arranged in the accommodating space.
3. The anti-overflow pump according to claim 2, characterized in that: The small piston (4) is annular and comprises an outer ring portion (41), a connecting portion and an inner ring portion (42) connected in sequence. The cross section of the outer ring portion (41) is an arc with a concave middle portion. The inner ring portion (42) is sleeved on the main column (2). A through hole (43) is provided on the connecting portion.
4. The anti-overflow pump according to claim 3, characterized in that: The upper end of the large piston (6) is provided with a step (61), and the step (61) abuts against the bottom of the outer ring portion (41). When the pressing head (3) changes from a depressed state to a pop-up state, the large piston (6) pushes the small piston (4) upward through the step (61).
5. The anti-overflow pump according to claim 1, characterized in that: The large piston (6) and the main column (2) are formed as one piece, and a liquid inlet hole (23) is provided on the main column. The liquid inlet hole (23) is provided below the large piston (6).
6. The anti-overflow pump according to claim 1, characterized in that: A one-way valve (7) is provided in the main column (2), the one-way valve (7) comprising an elastic portion (71) and a plugging head (72), a sealing inclined surface (21) is provided in the main column (2), the plugging head (72) abuts against the sealing inclined surface (21), and the elastic portion (71) is provided on the upper side of the plugging head (72) and connected to the inner wall of the main column (2).
7. The anti-overflow pump according to claim 2, characterized in that: The upper end of the main column (2) is provided with an external thread (22), the inner mounting portion (51) is provided with an internal thread (52), and the external thread (22) is adapted to the internal thread (52).