Pump body, water pump and oral irrigator

Abstract

The pump body comprises a pump body, the pump body is provided with a water pumping cavity, a water inlet, a water outlet and a common flow channel communicated with the water pumping cavity, the water outlet is communicated with one end, far away from the water pumping cavity, of the common flow channel so as to be communicated with the water pumping cavity, and the water inlet is communicated with the water pumping cavity. The water inlet is communicated with one side of the shared flow channel so as to be communicated with the water pumping cavity, and the sectional area of the water outlet, the sectional area of the shared flow channel and the sectional area of the water pumping cavity are sequentially increased. According to the technical scheme, smoothness of water inflow of the water pump is improved, and water flow loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of oral irrigators, and in particular to a pump body, a water pump and an oral irrigator. Background Art

[0002] A water flosser is a device that uses the impact force of a water column sprayed under a certain pressure to clean teeth. Generally, the piston in the water pump changes its internal pressure to achieve water absorption and water spraying. The pump body is often provided with a water pumping chamber, a water inlet channel and a water outlet channel. The water in the water storage chamber enters the water pumping chamber in one direction through the water inlet channel, and then flows out in one direction through the water outlet channel to achieve water pumping.

[0003] However, in the prior art, due to the unreasonable design of the pump body structure, the water pump has a large water inlet resistance, which causes a large loss when the water pump is inlet, affecting the flushing effect of the water flosser. Therefore, it is necessary to propose a new pump body structure to improve the smoothness of the water pump when it is inlet and reduce water flow loss. Utility Model Content

[0004] The main purpose of the utility model is to provide a pump body, aiming to improve the smoothness of water intake of the water pump and reduce water flow loss.

[0005] In order to achieve the above-mentioned purpose, the pump body proposed by the utility model comprises:

[0006] A pump body, wherein the pump body is provided with a water pumping cavity, a water inlet, a water outlet, and a common flow channel connected to the water pumping cavity, the water outlet is connected to an end of the common flow channel away from the water pumping cavity to connect to the water pumping cavity, the water inlet is connected to one side of the common flow channel to connect to the water pumping cavity, and the cross-sectional area of ​​the water outlet, the cross-sectional area of ​​the common flow channel and the cross-sectional area of ​​the water pumping cavity are arranged to increase in sequence.

[0007] Optionally, the water outlet is configured as an opening of the common flow channel away from the water pump cavity.

[0008] Optionally, the water outlet is connected to the common flow channel through a water outlet flow channel, and the axial direction of the water outlet flow channel is coaxially arranged with the axial direction of the common flow channel.

[0009] Optionally, the depth of the water outlet channel is less than 10 mm; and / or,

[0010] The depth of the water outlet channel is less than or equal to the radius of the water outlet channel.

[0011] Optionally, the depth of the common flow channel is greater than the depth of the water outlet flow channel; and / or,

[0012] The depth of the common flow channel is less than 3 times the depth of the water outlet flow channel.

[0013] Optionally, the water inlet is connected to the common flow channel through a water inlet flow channel, and the depth of the water inlet flow channel is greater than the depth of the water outlet flow channel; and / or,

[0014] The depth of the water inlet channel is less than 4 times the depth of the water outlet channel; and / or,

[0015] The cross-sectional area of ​​the water inlet flow channel is smaller than or equal to the cross-sectional area of ​​the water outlet flow channel.

[0016] Optionally, the ratio of the cross-sectional area of ​​the outlet flow channel to the cross-sectional area of ​​the common flow channel is less than or equal to 1 and greater than or equal to 1 / 3; and / or,

[0017] The ratio of the cross-sectional area of ​​the common flow channel to the cross-sectional area of ​​the pump water chamber is less than 1 and greater than or equal to 1 / 3.

[0018] Optionally, the water inlet is configured as an opening opened on a side wall of the common flow channel.

[0019] Optionally, the water inlet is connected to the common flow channel through a water inlet flow channel, and the axial direction of the water inlet flow channel is arranged at an angle with the axial direction of the common flow channel.

[0020] Optionally, the depth of the water inlet channel is less than or equal to the radius of the water pump cavity.

[0021] Optionally, the cross-sectional area of ​​one end of the water inlet channel facing the common channel is larger than the cross-sectional area of ​​the water inlet; and / or,

[0022] The cross section of one end of the water inlet flow channel facing the common flow channel is inclined toward the direction close to the water pump cavity.

[0023] Optionally, the ratio of the cross-sectional area of ​​the water inlet channel to the cross-sectional area of ​​the common channel is less than or equal to 1 and greater than or equal to 1 / 4.

[0024] Optionally, there is a first distance between the water inlet and the axis of the common flow channel, and there is a second distance between the side of the water pump cavity away from the common flow channel and the axis of the common flow channel, and the first distance is less than or equal to the second distance.

[0025] Optionally, the distance from the water inlet to the water pump cavity is smaller than the distance from the water outlet to the water pump cavity.

[0026] Optionally, between the water inlet and the water outlet, a guide surface is provided on the side wall of the common flow channel so that a portion of the common flow channel is gradually expanded.

[0027] Optionally, the water pump cavity is arranged to be gradually contracted in a direction close to the common flow channel; and / or,

[0028] Along the axial direction of the water inlet, the common flow channel has a first inner diameter, and along the axial direction perpendicular to the water inlet, the common flow channel has a second inner diameter, the first inner diameter is greater than or equal to the second inner diameter, and the length of the second inner diameter is equal to the inner diameter of the water outlet.

[0029] The utility model also provides a water pump, comprising the pump body as described above.

[0030] The utility model also provides a water flosser, comprising the water pump as described above.

[0031] The technical solution of the utility model is to open a pump water cavity, a water inlet, a water outlet, and a common flow channel connecting the pump water cavity on the pump body, the water outlet is connected to the end of the common flow channel away from the pump water cavity to connect the pump water cavity, and the water inlet is connected to one side of the common flow channel to connect the pump water cavity, that is, the water inlet flow channel and the water outlet flow channel of the pump body are at least partially shared, thereby reducing the total length of the flow channel in the pump body, thereby reducing the loss of water flow in the flow channel and ensuring the flow speed of the water flow. The cross-sectional area of ​​the pump water cavity is larger than the cross-sectional area of ​​the common flow channel, thereby increasing the volume of the pump water cavity, and also making the pressure change generated by the movement of the driving part in the pump water cavity greater, thereby increasing the water inlet pressure of the pump water cavity, facilitating the water flow from the water inlet into the pump water cavity, reducing water flow loss, and along the water inlet direction, the cross-sectional area from the common flow channel to the pump water cavity gradually increases, thereby further reducing the water inlet resistance of the pump body, improving the smoothness of the water inlet of the pump body, and thus reducing the water inlet noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0033] Figure 1 This is a schematic structural diagram of an embodiment of a pump body of the utility model;

[0034] Figure 2 for Figure 1 Front view of the middle pump body;

[0035] Figure 3 for Figure 1 A top view of the pump body;

[0036] Figure 4 for Figure 3 Sectional view of the pump body along AA;

[0037] Figure 5 for Figure 4 Parameter diagram of the pump body;

[0038] Figure 6 for Figure 1 Side view of the pump body;

[0039] Figure 7 for Figure 1 Bottom view of the pump body.

[0040] Description of Figure Numbers:

[0041]

[0042]

[0043] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0046] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions, taking "A and / or B as an example", including solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0047] In the prior art, the water inlet of the pump body is often directly connected to the water pump cavity through the water inlet channel, and the water outlet is often directly connected to the water pump cavity through the water outlet channel. Therefore, the water inlet channel and the water outlet channel need to be separately provided, resulting in the length of the water inlet channel and / or the water outlet channel being often long, causing the flow path of the water in the pump body to be too long, thus affecting the speed of the pulse water flow, and the water inlet channel is often provided on one side of the water pump cavity, causing the radial dimension of the pump body to be larger.

[0048] In view of this, the utility model provides a pump body 10 for a water pump of a water flosser.

[0049] In the embodiment of the present utility model, Figures 1 to 7 As shown, the pump body 10 includes a pump body 20, on which a water pumping chamber 21, a water inlet 22, a water outlet 23, and a common flow channel 24 connected to the water pumping chamber 21 are formed. The water outlet 23 is connected to an end of the common flow channel 24 away from the water pumping chamber 21 to connect to the water pumping chamber 21, and the water inlet 22 is connected to one side of the common flow channel 24 to connect to the water pumping chamber 21. The cross-sectional area of ​​the water outlet 23, the cross-sectional area of ​​the common flow channel 24, and the cross-sectional area of ​​the water pumping chamber 21 are arranged to increase in sequence.

[0050] Specifically, the water pump chamber 21 is opened on the pump body 20, and the water inlet 22 and the water outlet 23 are connected to the water pump chamber 21 through the common flow channel 24, the water outlet 23 is connected to the end of the common flow channel 24 away from the water pump chamber 21, and the water inlet 22 is connected to one side of the common flow channel 24. The common flow channel 24 can be regarded as a part of the water outlet flow channel 25, that is, the water inlet 22 is arranged on one side of the water outlet flow channel 25, that is, the water inlet flow channel 26 and the water outlet flow channel 25 of the pump body 10 are at least partially shared, thereby reducing the total length of the flow channel in the pump body 20, thereby reducing the loss of water flow in the flow channel and ensuring the flow rate of the water flow.

[0051] The cross-sectional area of ​​the water pump chamber 21 is larger than the cross-sectional area of ​​the common flow channel 24, thereby increasing the volume of the water pump chamber 21 and making the pressure change generated when the driving part in the water pump chamber 21 moves larger. On the one hand, the water inlet pressure of the water pump chamber 21 is increased, which facilitates the flow of water from the water inlet 22 into the water pump chamber 21, reducing water flow loss, and along the water inlet direction, the cross-sectional area from the common flow channel 24 to the water pump chamber 21 gradually increases, thereby further reducing the water inlet resistance of the pump body 10, improving the smoothness of water inlet of the pump body 10, and thereby reducing water inlet noise. Therefore, preferably, the water inlet 22 is arranged closer to the water pump chamber 21 than the water outlet 23, that is, the distance from the water inlet 22 to the water pump chamber 21 is smaller than the distance from the water outlet 23 to the water pump chamber 21, thereby further facilitating driving the water flow from the water inlet 22 and then to the water pump chamber 21 under the water inlet pressure of the water pump chamber 21, reducing pressure loss, and thereby reducing water flow loss of water flowing into the water pump chamber 21, and ensuring that sufficient water flows through the water inlet 22 and the common flow channel 24, thereby reducing water flow noise; on the other hand, it can also increase the water outlet pressure of the water pump chamber 21, and increase the water flow dynamics of the water flowing from the water pump chamber 21 to the common flow channel 24.

[0052] Furthermore, the cross-sectional area of ​​the water outlet 23 is larger than the cross-sectional area of ​​the common flow channel 24, so that the cross-sectional areas of the water outlet 23, the common flow channel 24 and the pump water chamber 21 are sequentially increased, so that when the water flow in the water pump flows out through the common flow channel 24 and the water outlet 23 in sequence under the pressure of the pump water chamber 21, its flow velocity can be further improved, thereby reducing the speed loss of water when flowing out of the water flosser and ensuring the outflow speed of the water flow.

[0053] In addition, the cross-sectional area of ​​the common flow channel 24 is smaller than the cross-sectional area of ​​the water pump chamber 21, so that the radial dimension of the pump body at the common flow channel 24 is often smaller than the radial dimension of the pump body at the water pump chamber 21. Therefore, when the water inlet 22 is arranged in the common flow channel 24, the overall radial dimension of the pump body 10 is often not increased, thereby reducing the overall dimension of the pump body 10, which contributes to the overall lightweight design of the water flosser.

[0054] The water pump used in the pump body 10 can be configured as a plunger pump. In this case, the driving part of the water pump (driving the pressure change in the pump water chamber 21) is configured as a plunger. The pump water chamber 21 is completely arranged on the pump body 10. The plunger part of the plunger slides back and forth in the pump water chamber 21 to achieve water inflow and outflow of the pump water chamber 21. The water pump can also be configured as a diaphragm pump. In this case, the driving part is configured as a pump water cup capsule. The pump water chamber 21 is formed by the pump body 10 and the pump water cup capsule. The pump water cup capsule reciprocates to achieve water inflow and outflow of the pump water chamber 21. The driving mechanism of the water flosser drives the driving part to move or vibrate to achieve the pressure change in the pump water chamber 21. The driving mechanism includes a driving motor, a transmission gear set and a transmission connecting member. One of the transmission gear sets is connected to the driving motor. One end of the transmission connecting member is eccentrically connected to another one of the transmission gear sets, and the other end is connected to the driving part, so that the driving motor can drive the transmission gear set to rotate, thereby driving the transmission connecting member to move, and driving the driving part to move or vibrate.

[0055] The driving part moves in a direction away from the water outlet 23, and the water pump is switched to a water inlet state. At this time, the pressure in the water pump chamber 21 decreases. Under the action of the pressure, the water inlet 22 opens and the water outlet 23 closes to allow water to flow into the water pump chamber 21. The water pump is switched from a water inlet state to a water outlet state. At this time, the pressure in the water pump chamber 21 increases. Under the action of the pressure, the water inlet 22 opens and the water outlet 23 closes to allow the liquid in the water pump chamber 21 to flow out.

[0056] In one embodiment, the water outlet 23 is configured as an opening of the common flow channel 24 away from the pump water cavity 21. That is, the water outlet 23 is directly formed on the common flow channel 24, that is, the common flow channel 24 is used as the water outlet flow channel 25, thereby reducing the length of the water outlet flow channel 25 to the greatest extent, thereby reducing the axial size of the pump body 10.

[0057] In another embodiment, referring to Figure 3 and Figure 4 , the water outlet 23 is connected to the common flow channel 24 through the water outlet flow channel 25, and the axial direction of the water outlet flow channel 25 is coaxially arranged with the axial direction of the common flow channel 24. That is, the water outlet 23 is not directly arranged on the common flow channel 24, and the two are connected through the water outlet flow channel 25, and the water outlet flow channel 25 is coaxially arranged with the common flow channel 24, that is, when the water flows out of the pump water cavity 21, there is no need to turn or deviate, thereby reducing the speed loss of the water flow when it flows from the common flow channel 24 to the water outlet flow channel 25, and it is also convenient for the installation of the water outlet check valve in the water pump. Furthermore, the water outlet 23, the water outlet flow channel 25 and the common flow channel 24 are all coaxially arranged.

[0058] Furthermore, the depth of the water outlet flow channel 25 is less than 10 mm. If the depth of the water outlet flow channel 25 is greater than or equal to 10 mm, the size of the water outlet flow channel 25 is too large, which is not conducive to reducing the flow path of the water out of the pump body 10, increasing unnecessary water outflow speed loss, and is not conducive to reducing the axial size of the pump body 10. Of course, in other embodiments, the depth of the water outlet flow channel 25 can also be greater than or equal to 10 mm.

[0059] In another embodiment, the depth of the water outlet channel 25 is less than or equal to the radius of the water outlet channel 25. That is, the overall shape of the water outlet channel 25 is flat, thereby ensuring that the length of the water outlet channel 25 is short enough, thereby reducing the length of the water outlet channel 25, and further reducing the axial dimension of the pump body 10. Of course, in other embodiments, the depth of the water outlet channel 25 may also be equal to the radius of the water outlet channel 25.

[0060] Reference Figures 3 to 5 In one embodiment, the depth of the common flow channel 24 is greater than the depth of the outlet flow channel 25, referring to Figure 5 , the depth of the common flow channel 24 is L1, and the depth of the outlet flow channel 25 is L2. Since the water inlet 22 or the water inlet flow channel 26 is disposed on one side of the common flow channel 24, the depth of the common flow channel 24 must be greater than the axial dimension of the water inlet 22 along the common flow channel 24, and therefore the depth of the outlet flow channel 25 can be less than the axial dimension of the water inlet 22 along the common flow channel 24, thereby further reducing the depth of the outlet flow channel 25, and further reducing the axial dimension of the pump body 10. Of course, in other embodiments, the depth of the common flow channel 24 can also be equal to or less than the depth of the outlet flow channel 25.

[0061] Furthermore, the depth of the common flow channel 24 is less than 3 times the depth of the outlet flow channel 25, that is, L1<3L2. If the depth of the common flow channel 24 is greater than or equal to 3 times the depth of the outlet flow channel 25, the depth of the common flow channel 24 is too large, which may cause the overall path of the water flowing out of the pump body 10 to be too long, which may increase unnecessary water flow outflow speed loss, and is not conducive to reducing the axial size of the pump body 10. Of course, in other embodiments, the depth of the common flow channel 24 may also be greater than or equal to 3 times the depth of the outlet flow channel 25.

[0062] Reference Figure 3 and Figure 4 In one embodiment, the water inlet 22 is connected to the common flow channel 24 through the water inlet flow channel 26, and the depth of the water inlet flow channel 26 is greater than the depth of the water outlet flow channel 25. Specifically, affected by the overall size of the pump body 10, the water inlet flow channel 26 needs to have a certain depth to facilitate the installation of the water inlet joint (refer to Figure 4If the length of the water inlet channel 26 is too short, the depth of the water inlet connector into the pump body 10 is often too deep, and the corresponding water inlet 22 often requires sufficient installation space to install the water inlet connector, which may cause the installation space to encroach on the installation space of the pump water cavity 21 or the water outlet connector. The water inlet channel 26 should be set as close to the pump water cavity 21 as possible, so as to reduce the flow path from the water inlet channel 26 to the pump water cavity 21, and facilitate the flow of water into the pump water cavity 21.

[0063] Furthermore, the axial direction of the water inlet channel 26 is arranged at an angle with the axial direction of the common channel 24, thereby further facilitating the installation of the water inlet joint.

[0064] In order to reduce the depth of the water inlet channel 26, in one embodiment, the depth of the water inlet channel 26 is less than 4 times the depth of the water outlet channel 25. Figure 5 , the depth of the water inlet channel 25 is L3, that is, L3<4L1. If the depth of the water inlet channel 26 is greater than or equal to 4 times that of the water outlet channel 25, it is not only not conducive to reducing the flow path of the water flow into the pump water chamber 21, increasing unnecessary water flow velocity loss, but also not conducive to reducing the radial dimension of the pump body 10, thereby affecting the miniaturization of the water flosser. Of course, in other embodiments, the depth of the water inlet channel 26 can also be greater than or equal to 4 times the depth of the water outlet channel 25.

[0065] In other embodiments, the cross-sectional area of ​​the water inlet channel 26 is less than or equal to the cross-sectional area of ​​the water outlet channel 25. Since the water inlet channel 26 is arranged on one side of the common channel 24, the size of the water inlet channel 26 will inevitably affect the depth of the common channel 24, so the cross-sectional area of ​​the water inlet channel 26 is less than or equal to the cross-sectional area of ​​the water outlet channel 25, thereby further reducing the depth of the common channel 24. And preferably, the axial dimension of the water inlet 22 along the common channel 24 is less than or equal to the diameter of the water outlet channel 25. However, in order to ensure that the cross-sectional area of ​​the water inlet 22 is sufficient, the circumferential dimension of the water inlet 22 along the common channel 24 can be increased, that is, the cross-section of the water inlet 22 and / or the water inlet channel 26 can be rectangular or elliptical. Of course, in other embodiments, the cross-sectional area of ​​the water inlet channel 26 can also be greater than the cross-sectional area of ​​the water outlet channel 25.

[0066] In one embodiment, the ratio of the cross-sectional area of ​​the water outlet flow channel 25 to the cross-sectional area of ​​the common flow channel 24 is less than or equal to 1, and greater than or equal to 1 / 3. If the ratio of the cross-sectional area of ​​the water outlet flow channel 25 to the cross-sectional area of ​​the common flow channel 24 is greater than 1, the cross-sectional area of ​​the water outlet flow channel 25 is greater than the cross-sectional area of ​​the common flow channel 24, which will inevitably affect the outflow speed of the water flow; if the ratio of the cross-sectional area of ​​the water outlet flow channel 25 to the cross-sectional area of ​​the common flow channel 24 is less than 1 / 3, the difference between the cross-sectional area of ​​the water outlet flow channel 25 and the cross-sectional area of ​​the common flow channel 24 is too large, and the intersection of the water outlet flow channel 25 and the common flow channel 24 may further block the flow of water, which not only affects the outflow speed of the water flow, but also may cause the possibility of water flow turbulence. Therefore, the ratio of the cross-sectional area of ​​the water outlet flow channel 25 to the cross-sectional area of ​​the common flow channel 24 is less than or equal to 1, and greater than or equal to 1 / 3, so as to ensure the outflow speed of the water flow. Of course, in other embodiments, the ratio of the cross-sectional area of ​​the water outlet channel 25 to the cross-sectional area of ​​the common channel 24 is less than 1 / 3.

[0067] In another embodiment, the ratio of the cross-sectional area of ​​the common flow channel 24 to the cross-sectional area of ​​the pump water chamber 21 is less than 1 and greater than or equal to 1 / 3. If the ratio of the cross-sectional area of ​​the common flow channel 24 to the cross-sectional area of ​​the pump water chamber 21 is greater than 1, the cross-sectional area of ​​the common flow channel 24 is greater than the cross-sectional area of ​​the pump water chamber 21, which will inevitably affect the outflow speed of the water flow; if the ratio of the cross-sectional area of ​​the common flow channel 24 to the cross-sectional area of ​​the pump water chamber 21 is less than 1 / 3, the difference between the cross-sectional area of ​​the common flow channel 24 and the cross-sectional area of ​​the pump water chamber 21 is too large, and the intersection of the common flow channel 24 and the pump water chamber 21 may further block the flow of water, which not only affects the outflow speed of the water flow, but also may cause the possibility of water flow turbulence. Therefore, the ratio of the cross-sectional area of ​​the common flow channel 24 to the cross-sectional area of ​​the pump water chamber 21 is less than or equal to 1 and greater than or equal to 1 / 3, thereby ensuring the outflow speed of the water flow. Of course, in other embodiments, the ratio of the cross-sectional area of ​​the common flow channel 24 to the cross-sectional area of ​​the water pump cavity 21 is less than 1 / 3.

[0068] Refer again Figures 1 to 6, because the distance from the water inlet 22 to the water pump cavity 21 is smaller than the distance from the water outlet 23 to the water pump cavity 21, in one embodiment, between the water inlet 22 and the water outlet 23, the side wall of the common flow channel 24 is provided with a guide surface 241, so that part of the common flow channel 24 is gradually expanded. Specifically, between the water inlet 22 and the water outlet 23 is the intersection of the common flow channel 24 and the water outlet 23 (water outlet flow channel 25), and in order to reduce the possibility of interference between the water inlet joint and the water outlet joint during installation, the water outlet 23 should be arranged on the side of the common flow channel 24 away from the water inlet 22, so the side wall of the common flow channel 24 is provided with a guide surface 241, so as to further guide the outflow of the water flow, and also reduce the formation of a step surface on the inner wall of the common flow channel 24, reduce the possibility of turbulence of the water flow, and make part of the common flow channel 24 gradually expanded, so as to further guide the outflow of the water flow.

[0069] Furthermore, along the axial direction of the water inlet 22, the common flow channel 24 has a first inner diameter, and along the axial direction perpendicular to the water inlet 22, the common flow channel 24 has a second inner diameter, the first inner diameter is greater than or equal to the second inner diameter, and the length of the second inner diameter is equal to the inner diameter of the water outlet 23. Specifically, Figure 6 As shown, the first inner diameter is R1, the second inner diameter is R2, and R1≥R2, that is, the cross-section of the common flow channel 24 is configured as an ellipse or a circle. It can be understood that since the cross-sectional area of ​​the common flow channel 24 is larger than the cross-sectional area of ​​the water outlet 23, if the cross-section of the common flow channel 24 is always configured as a circle, a step surface will inevitably be formed at the junction of the common flow channel 24 and the water outlet 23, and the formed step surface at least encloses half of the water outlet 23, which is not conducive to the outflow of water. Therefore, the length of the second inner diameter is equal to the inner diameter of the water outlet 23, and the side of the common flow channel 24 away from the water inlet 22 is flush with the water outlet 23, thereby reducing the formation of a step surface at the junction of the common flow channel 24 and the water outlet 23, reducing the possibility of water flow turbulence, and reducing both water outlet loss and water flow noise.

[0070] In another embodiment, the pump water chamber 21 is arranged to be gradually reduced in the direction close to the common flow channel 24, so as to further guide the outflow or inflow of the water flow, thereby further reducing the loss of the flow rate of the water flow and improving the working efficiency of the water pump.

[0071] Compared with the solution that the water inlet 22 is connected to the common flow channel 24 through the water inlet channel 26, in another embodiment, the water inlet 22 is configured as an opening opened on the side wall of the common flow channel 24. That is, the water inlet 22 is directly formed on the common flow channel 24, thereby reducing the length of the water inlet channel 26 to the greatest extent, thereby reducing the radial dimension of the pump body 10.

[0072] In one embodiment, the depth of the water inlet channel 26 is less than or equal to the radius of the pump water chamber 21. This further reduces the flow path of water flowing into the pump water chamber 21, reduces unnecessary water flow velocity loss, reduces the radial dimension of the pump body 10, and thus ensures the miniaturization of the water flosser.

[0073] Refer again Figures 1 to 6 In one embodiment, the cross-sectional area of ​​the end of the water inlet channel 26 toward the common channel 24 is larger than the cross-sectional area of ​​the water inlet 22. Specifically, the cross-sectional area of ​​the opening of the end of the water inlet channel 26 close to the pump water cavity 21 is increased, so as to facilitate the flow of water into the pump water cavity 21. In order to achieve that the cross-sectional area of ​​the end of the water inlet channel 26 toward the common channel 24 is larger than the cross-sectional area of ​​the water inlet 22, in one embodiment, the cross-sectional area of ​​the water inlet channel 26 is set to be larger in the direction close to the common channel 24. In another embodiment, the cross-sectional area of ​​the water inlet channel 26 is larger than the cross-sectional area of ​​the water inlet 22.

[0074] In another embodiment, the cross section of the water inlet channel 26 at one end facing the common channel 24 is tilted toward the direction close to the water pump chamber 21. That is, the cross section where the water inlet channel 26 intersects with the common channel 24 is tilted, so that the cross section area of ​​the water inlet channel 26 at one end facing the common channel 24 is increased without increasing the overall size of the water inlet channel 26, which not only facilitates the flow of water into the water pump chamber 21, but also reduces the space occupied by the water inlet channel 26. And the cross section of the water inlet channel 26 at one end facing the common channel 24 is tilted toward the direction close to the water pump chamber 21, that is, the shorter side of the water inlet channel 26 is located on the side close to the water pump chamber 21, and the longer side of the water inlet channel 26 is located on the side away from the water pump chamber 21.

[0075] In one embodiment, the ratio of the cross-sectional area of ​​the water inlet channel 26 to the cross-sectional area of ​​the common channel 24 is less than or equal to 1 and greater than or equal to 1 / 4. Specifically, if the ratio of the cross-sectional area of ​​the water inlet channel 26 to the cross-sectional area of ​​the common channel 24 is greater than 1, the cross-sectional area of ​​the water inlet channel 26 is greater than the cross-sectional area of ​​the common channel 24. If the cross-sectional area of ​​the water inlet channel 26 is too large, it may reduce the effect of the pressure change in the pump water chamber 21 on the pressure change in the water inlet channel 26, thereby causing insufficient opening force of the water inlet check valve, affecting the flow of water into the pump water chamber 21; if the ratio of the cross-sectional area of ​​the water inlet channel 26 to the cross-sectional area of ​​the common channel 24 is less than 1 / 4, the cross-sectional area of ​​the water inlet channel 26 is too small, which may cause the interception amount of the water inlet channel 26 to be limited, thereby affecting the water inlet amount of the pump water chamber 21. Therefore, the ratio of the cross-sectional area of ​​the water inlet channel 26 to the cross-sectional area of ​​the common channel 24 is less than or equal to 1, and greater than or equal to 1 / 3, thereby ensuring that a sufficient amount of water flow smoothly flows into the pump water chamber 21. Of course, in other embodiments, the ratio of the cross-sectional area of ​​the water inlet channel 26 to the cross-sectional area of ​​the common channel 24 is less than 1 / 4, or greater than 1.

[0076] Reference Figures 4 to 6 In one embodiment, the water inlet 22 has a first distance to the axis of the common flow channel 24, and the pump water cavity 21 has a second distance to the axis of the common flow channel 24 away from the side of the common flow channel 24, and the first distance is less than or equal to the second distance. Figure 5 , the first distance is D1, the second distance is D2, if the axis of the common flow channel 24 is eccentrically arranged relative to the axis of the water pumping chamber 21, the second distance is the farthest distance between the cavity wall of the water pumping chamber 21 and the axis of the common flow channel 24; if the axis of the common flow channel 24 coincides with the axis of the water pumping chamber 21, the second distance is the radius of the water pumping chamber 21. The first distance is less than or equal to the second distance, that is, in the cavity wall direction of the water pumping chamber 21, the water inlet 22 is recessed, so that the radial dimension of the pump body 10 at the common flow channel 24 is less than or equal to the radial dimension of the pump body 10 at the water pumping chamber 21, that is, in this solution, whether the water inlet 22 is directly arranged on the common flow channel 24, or the water inlet 22 is connected to the water pumping chamber 21 through the water inlet channel 26, in this solution, the setting of the water inlet 22 will not increase the radial dimension of the pump body 10, which is conducive to the miniaturization of the water flosser.

[0077] The utility model also proposes a water pump, which includes a pump body 10. The specific structure of the pump body 10 refers to the above embodiments. Since the water pump adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0078] The utility model also proposes a water flosser, which includes a water pump. The specific structure of the water pump refers to the above-mentioned embodiment. Since the water flosser adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0079] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pump body, characterized in that: include: A pump body, wherein the pump body is provided with a water pumping cavity, a water inlet, a water outlet, and a common flow channel connected to the water pumping cavity, the water outlet is connected to an end of the common flow channel away from the water pumping cavity to connect to the water pumping cavity, the water inlet is connected to one side of the common flow channel to connect to the water pumping cavity, and the cross-sectional area of ​​the water outlet, the cross-sectional area of ​​the common flow channel and the cross-sectional area of ​​the water pumping cavity are arranged to increase in sequence.

2. The pump body according to claim 1, characterized in that: The water outlet is configured as an opening of the common flow channel away from the water pump cavity.

3. The pump body according to claim 1, characterized in that: The water outlet is connected to the common flow channel through a water outlet flow channel, and the axial direction of the water outlet flow channel is coaxially arranged with the axial direction of the common flow channel.

4. The pump body according to claim 3, characterized in that: The depth of the water outlet channel is less than 10 mm; and / or, The depth of the water outlet channel is less than or equal to the radius of the water outlet channel.

5. The pump body according to claim 3, characterized in that: The depth of the common flow channel is greater than the depth of the outlet flow channel; and / or, The depth of the common flow channel is less than 3 times the depth of the water outlet flow channel.

6. The pump body according to claim 3, characterized in that: The water inlet is connected to the common flow channel through a water inlet flow channel, and the depth of the water inlet flow channel is greater than the depth of the water outlet flow channel; and / or, The depth of the water inlet channel is less than 4 times the depth of the water outlet channel; and / or, The cross-sectional area of ​​the water inlet flow channel is smaller than or equal to the cross-sectional area of ​​the water outlet flow channel.

7. The pump body according to claim 3, characterized in that: The ratio of the cross-sectional area of ​​the outlet flow channel to the cross-sectional area of ​​the common flow channel is less than or equal to 1 and greater than or equal to 1 / 3; and / or, The ratio of the cross-sectional area of ​​the common flow channel to the cross-sectional area of ​​the pump water chamber is less than 1 and greater than or equal to 1 / 3.

8. The pump body according to claim 1, characterized in that: The water inlet is configured as an opening opened on the side wall of the common flow channel.

9. The pump body according to claim 1, characterized in that: The water inlet is connected to the common flow channel through a water inlet flow channel, and the axial direction of the water inlet flow channel is arranged at an angle with the axial direction of the common flow channel.

10. The pump body according to claim 9, characterized in that: The depth of the water inlet channel is less than or equal to the radius of the water pump cavity.

11. The pump body according to claim 9, characterized in that: The cross-sectional area of ​​one end of the water inlet channel toward the common channel is larger than the cross-sectional area of ​​the water inlet; and / or, The cross section of one end of the water inlet flow channel facing the common flow channel is inclined toward the direction close to the water pump cavity.

12. The pump body according to claim 9, characterized in that: The ratio of the cross-sectional area of ​​the water inlet flow channel to the cross-sectional area of ​​the common flow channel is less than or equal to 1 and greater than or equal to 1 / 4.

13. The pump body according to claim 8 or 9, characterized in that: There is a first distance between the water inlet and the axis of the common flow channel, and there is a second distance between the side of the pump water cavity away from the common flow channel and the axis of the common flow channel, and the first distance is less than or equal to the second distance.

14. The pump body according to claim 1, characterized in that: The distance from the water inlet to the water pump cavity is smaller than the distance from the water outlet to the water pump cavity.

15. The pump body according to claim 14, characterized in that A guide surface is provided on the side wall of the common flow channel between the water inlet and the water outlet, so that a portion of the common flow channel is gradually expanded.

16. The pump body according to claim 1, characterized in that: The pump water chamber is arranged to be gradually reduced in a direction close to the common flow channel; and / or, Along the axial direction of the water inlet, the common flow channel has a first inner diameter, and along the axial direction perpendicular to the water inlet, the common flow channel has a second inner diameter, the first inner diameter is greater than or equal to the second inner diameter, and the length of the second inner diameter is equal to the inner diameter of the water outlet.

17. A water pump, characterized in that: Comprising a pump body as claimed in any one of claims 1 to 16.

18. A water flosser, characterized in that: Comprising a water pump as claimed in claim 17.

Images