Water pump of novel oral irrigator

Abstract

The utility model discloses a water pump of a novel oral irrigator, which comprises a pump body, an elastic pump membrane movably arranged in the pump body, a driving device used for driving the elastic pump membrane to reciprocate in the pump body, and a driving rod connected with the driving device and the elastic pump membrane, an umbrella-shaped valve used for one-way circulation is arranged between the water inlet cavity and the water outlet cavity, and a water inlet valve block used for one-way circulation is arranged at a water inlet of the water inlet cavity. A traditional piston is replaced with the elastic pump membrane, reciprocating motion of the piston is replaced with elastic stretching and compression of the elastic pump membrane, the tightness of the structure can be greatly improved, larger pressure can be generated, frictional wear cannot be generated, water leakage cannot occur after long-term work, and the service life is greatly prolonged.

Description

Technical field:

[0001] The utility model relates to the technical field of oral irrigators, in particular to a new water pump for oral irrigators. Background technology:

[0002] An oral irrigator is an oral care tool used to clean the hard-to-reach areas between teeth and the gum margin. It sprays high-pressure water or pulsed water to spray water or oral cleaning fluid to the dead corners between teeth and the gum margin, thereby removing food debris, bacteria and dental plaque to prevent oral problems such as gum disease and tooth decay. An oral irrigator usually includes a handle and a nozzle. The user can control the intensity and spray direction of the water flow by operating the handle to achieve the purpose of oral cleaning.

[0003] At present, the water pumps for oral irrigators on the market are mainly piston pumps. Piston pumps are prone to the risk of water leakage due to long-term wear and tear. For example, in the technical solution disclosed in the portable oral irrigator with Chinese patent application number 201220310432.9, the micro pump 7 is a common piston pump. When this type of piston pump is in use, the piston will repeatedly rub against the inner wall of the cavity, which is prone to wear and tear. After long-term work, the pump body will leak, affecting the normal use of the oral irrigator and reducing the service life of the oral irrigator.

[0004] In view of this, the inventor proposes the following technical solution. Utility model content:

[0005] The utility model aims to overcome the deficiencies of the prior art and provide a new water pump for a dental flosser.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions: a new water pump for a water flosser, comprising: a pump body, an elastic pump membrane movably installed in the pump body, a driving device for driving the elastic pump membrane to reciprocate in the pump body, and a driving rod connecting the driving device and the elastic pump membrane, a water inlet chamber and a water outlet chamber are provided in the pump body, an umbrella-shaped valve for one-way flow is provided between the water inlet chamber and the water outlet chamber, and a water inlet valve sheet for one-way flow is provided at the water inlet of the water inlet chamber.

[0007] Furthermore, in the above technical solution, the elastic pump membrane is a circular elastic body, and its cross section is two "U" shapes. The middle part of the elastic pump membrane is connected to the driving rod, and the edge of the elastic pump membrane is connected to the pump body.

[0008] Furthermore, in the above technical solution, at least one annular protrusion is provided on the edge of the elastic pump membrane to tightly fit the pump body.

[0009] Furthermore, in the above technical solution, a lower bracket for mounting a driving device and tightly fitting and fixing the elastic pump membrane is provided at the lower end of the pump body, and the driving rod is located at the lower bracket and is used to connect the elastic pump membrane and the driving device.

[0010] Furthermore, in the above technical solution, the edge of the elastic pump membrane is also formed with a flange extending and locking onto the lower bracket, and the upper end of the lower bracket is provided with a groove for locking with the flange; the lower end of the pump body is provided with a stepped groove for locking and connecting with the elastic pump membrane and the lower bracket.

[0011] Furthermore, in the above technical solution, the pump body and the lower bracket are fastened together by screws.

[0012] Furthermore, in the above technical solution, the driving device includes a motor installed in the lower bracket, a motor gear arranged on the motor output shaft, and an eccentric gear rotatably installed in the lower bracket and connected to the driving rod, and the lower end of the driving rod is sleeved on the eccentric gear.

[0013] Furthermore, in the above technical solution, a water inlet valve seat for fixing a water inlet valve plate is installed at the water inlet of the water inlet chamber, and the water inlet valve plate includes an outer ring portion clamped and fixed between the pump body and the water inlet valve seat, and a spring portion formed in the middle of the outer ring portion and capable of covering and sealing the water inlet valve seat, wherein the size of the water inlet channel in the water inlet valve seat is smaller than the spring portion, and the water inlet of the water inlet chamber is provided with a pressure transformer chamber whose size is larger than the spring portion, and a corridor is provided between the pressure transformer chamber and the water inlet chamber.

[0014] Furthermore, in the above technical solution, a clamping installation groove with a "T"-shaped interface is provided at the center of the elastic pump membrane, the clamping installation groove is sleeved on the upper part of the driving rod, and a clamping protrusion with a "T"-shaped cross-section is provided at the upper end of the driving rod.

[0015] Furthermore, in the above technical solution, the upper portion of the driving rod is further provided with a limiting convex ring which presses against the lower end surface of the elastic pump membrane and tightly cooperates with the locking convex portion.

[0016] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: the utility model adopts an elastic pump membrane to replace the traditional piston, and utilizes the elastic stretching and compression of the elastic pump membrane to replace the reciprocating motion of the piston, which can not only greatly improve the tightness of the structure and generate greater pressure, but also will not generate friction and wear, and will not leak after long-term work, thereby greatly improving the service life; secondly, a water inlet chamber and a water outlet chamber are separately arranged in the pump body, and an umbrella-shaped valve is used to achieve one-way flow between the water inlet chamber and the water outlet chamber, which not only has a simpler structural principle and is convenient for processing and maintenance, but also can effectively control the pressure of the water inlet chamber to prevent pressure relief, thereby greatly improving the water outlet pressure of the water pump. Description of the drawings:

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the elastic pump membrane in the utility model;

[0019] Figure 3 yes Figure 1 A partial enlarged view of the X in the middle;

[0020] Figure 4 It is a schematic diagram of the connection structure of the driving rod in the utility model;

[0021] Figure 5 It is a structural schematic diagram of the utility model in the water absorption state;

[0022] Figure 6 yes Figure 5 A partial enlarged view of the Y position in the middle;

[0023] Figure 7 It is a structural schematic diagram of the utility model in the water spraying state;

[0024] Figure 8 yes Figure 7 A partial enlarged view of the middle Z. Specific implementation method:

[0025] The utility model is further described below in conjunction with specific embodiments and drawings.

[0026] The utility model claims protection for a water pump used for a water flosser. The water pump is characterized in that a flexible elastic pump membrane 2 is used, and the elastic pump membrane 2 is pushed to stretch and compress elastically by a driving rod 4, so that a negative pressure and pressurization are generated in a water inlet chamber A, thereby achieving the functions of absorbing and spraying water. The eccentric gear 33 is driven by a motor 31 to drive the driving rod 4 to extend and retract. The pump has high reliability, high pressure, low cost, strong practicality, simple structure, and convenient assembly. At the same time, it has high stability and is not easy to leak.

[0027] See Figures 1 to 8As shown, a new type of water pump for a water flosser comprises: a pump body 1, an elastic pump membrane 2 movably installed in the pump body 1, a driving device 3 for driving the elastic pump membrane 2 to reciprocate in the pump body 1, and a driving rod 4 connecting the driving device 3 and the elastic pump membrane 2, wherein a water inlet chamber A and a water outlet chamber B are arranged in the pump body 1, an umbrella valve 5 for one-way flow is arranged between the water inlet chamber A and the water outlet chamber B, and a water inlet valve plate 6 for one-way flow is arranged at the water inlet of the water inlet chamber A. An elastic pump membrane 2 is used to replace the traditional piston, and the elastic stretching and compression of the elastic pump membrane 2 are used to replace the reciprocating motion of the piston. This can not only greatly improve the tightness of the structure and generate greater pressure, but also will not cause friction and wear, and will not leak after long-term work, thereby greatly improving the service life; secondly, a water inlet chamber A and a water outlet chamber B are separated in the pump body 1, and an umbrella-shaped valve 5 is used to achieve one-way flow between the water inlet chamber A and the water outlet chamber B. Not only is the structural principle simpler, and it is easy to process and maintain, but it can also effectively control the pressure of the water inlet chamber A to prevent pressure relief, thereby greatly improving the water outlet pressure of the water pump.

[0028] The elastic pump membrane 2 is a circular elastic body, and its cross section is two "U" shapes. The middle of the elastic pump membrane 2 is connected to the driving rod 4, and the edge of the elastic pump membrane 2 is connected to the pump body 1. The cross section of the elastic pump membrane 2 is two "U" shapes. After the two ends are fixed to the pump body 1, the movement stroke of the elastic pump membrane 2 can be increased, and the pressure generated by the elastic pump membrane 2 can be increased.

[0029] At least one annular protrusion 21 is provided on the edge of the elastic pump membrane 2 to fit tightly with the pump body 1. The lower end of the water inlet chamber A of the pump body 1 is set to an arc chamfer, so that during the expansion and contraction process of the elastic pump membrane 2, no friction and scratching will be generated with the lower end of the pump body 1, avoiding the stress concentration and breakage caused by right-angle impact on the elastic pump membrane 2. At the same time, by adding multiple annular protrusions 21 on the edge of the elastic pump membrane 2 to press and contact with the pump body 1, the tight fit between the elastic pump membrane 2 and the pump body 1 can be greatly improved, the sealing can be enhanced, and water leakage can be prevented. In this embodiment, the annular protrusions 21 are provided in three positions, of which two are located on the inner wall of the elastic pump membrane 2, and the heights of the two annular protrusions 21 are different, and the other is located on the upper end surface of the elastic pump membrane 2. This layout can improve the tightness and effectively prevent water leakage.

[0030] The lower end of the pump body 1 is provided with a lower bracket 7 for mounting the driving device 3 and tightly fitting and fixing the elastic pump membrane 2 . The driving rod 4 is located at the lower bracket 7 and is used to connect the elastic pump membrane 2 and the driving device 3 .

[0031] The edge of the elastic pump membrane 2 is also formed with a flange 22 extending and locking onto the lower bracket 7, and the upper end of the lower bracket 7 is provided with a groove 71 for locking with the flange 22; the lower end of the pump body 1 is provided with a stepped groove 11 for locking and connecting with the elastic pump membrane 2 and the lower bracket 7.

[0032] The pump body 1 and the lower bracket 7 are fastened together by screws 9, which has high reliability. The elastic pump membrane 2 is clamped between the pump body 1 and the lower bracket 7. The elastic deformation produced by the elastic pump membrane 2 when squeezed plays a role in tightly connecting the pump body 1 and the lower bracket 7, thereby effectively preventing water leakage.

[0033] The driving device 3 includes a motor 31 installed in the lower bracket 7, a motor gear 32 arranged on the output shaft of the motor 31, and an eccentric gear 33 rotatably installed in the lower bracket 7 and connected to the driving rod 4. The lower end of the driving rod 4 is sleeved on the eccentric gear 33. The eccentric gear 33 is an eccentric face gear.

[0034] A water inlet valve seat 8 for fixing the water inlet valve plate 6 is installed at the water inlet of the water inlet chamber A, and the water inlet valve plate 6 includes an outer ring portion 61 clamped and fixed between the pump body 1 and the water inlet valve seat 8, and a spring portion 62 formed in the middle of the outer ring portion 61 and capable of covering and sealing on the water inlet valve seat 8, wherein the water inlet channel 81 in the water inlet valve seat 8 is smaller than the spring portion 62, and the water inlet of the water inlet chamber A is provided with a transformer chamber A1 whose size is larger than the spring portion 62, and a corridor is provided between the transformer chamber A and the water inlet chamber A.

[0035] The center of the elastic pump membrane 2 is provided with a clamping installation groove 23 with a "T"-shaped interface. The clamping installation groove 23 is sleeved on the upper part of the driving rod 4, and the upper end of the driving rod 4 is provided with a clamping protrusion 41 with a "T"-shaped cross-section.

[0036] The upper portion of the driving rod 4 is also provided with a limiting convex ring 42 which presses against the lower end surface of the elastic pump membrane 2 and is tightly matched with the locking convex portion.

[0037] In the utility model, the elastic pump membrane 2 used in the pump body 1 is a soft rubber, and the material can be flexible materials such as silicone, rubber, TPE, etc.; the driving rod 4 is an integral body, processed in an integrated molding manner, with a simple structure, directly connecting the eccentric gear 33 and the elastic pump membrane 2; the water inlet valve plate 6 is a high-elastic rubber plate with high strength and good elasticity, which can achieve a unidirectional conduction effect at the water inlet; the umbrella valve 5 is made of high-elastic rubber material, located at the water outlet of the water inlet chamber A, and opens automatically due to the action of water flow when discharging water, and automatically closes due to the negative pressure inside the pump when absorbing water, which can achieve the effect of only discharging water at the water outlet without returning water.

[0038] In summary, when the utility model is working, there are two actions. One is the water absorption action, which is used to let the water in the water tank enter the water inlet chamber A through the water inlet valve plate 6. Figure 5 As shown, another action is water spraying, which is used to spray the water in the water inlet chamber A from the umbrella valve 5 to the water outlet chamber B, thereby pressurizing the water in the water tank and spraying it from the water outlet chamber B. Specifically:

[0039] See Figure 5 As shown, when the pump body 1 absorbs water, the driving device 3 drives the elastic pump membrane 2 to move downward through the driving rod 4, so that negative pressure is generated in the water inlet chamber A. Since the umbrella valve 5 can only discharge water in one direction but cannot allow water to enter, the water inlet valve plate 6 is opened under the action of negative pressure. At this time, water flows into the water inlet chamber A from the water inlet channel 81 of the water inlet valve seat 8 under the action of negative pressure.

[0040] See Figure 6 As shown, when the pump body 1 sprays water, the driving device 3 drives the elastic pump membrane 2 to move upward through the driving rod 4, squeezing the water in the water inlet chamber A, so that the pressure in the water inlet chamber A increases. Since the water inlet valve plate 6 can only allow water to flow in one direction but not out, after the water inlet chamber A is pressurized, the water flow will push open the umbrella valve 5 and flow out of the water inlet chamber B to achieve water spraying.

[0041] Under the action of the driving device 3 repeatedly driving the elastic pump membrane 2 to expand and contract up and down, the pump body 1 will continuously draw water from the water tank and spray it out from the water outlet chamber B to achieve high-pressure water spraying.

[0042] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made according to the structure, characteristics and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A new water pump for a water flosser, characterized in that: include: A pump body (1), an elastic pump membrane (2) movably mounted in the pump body (1), a driving device (3) for driving the elastic pump membrane (2) to reciprocate in the pump body (1), and a driving rod (4) connecting the driving device (3) and the elastic pump membrane (2); a water inlet chamber (A) and a water outlet chamber (B) are arranged in the pump body (1); an umbrella-shaped valve (5) for one-way flow is arranged between the water inlet chamber (A) and the water outlet chamber (B); and a water inlet valve plate (6) for one-way flow is arranged at the water inlet of the water inlet chamber (A).

2. The water pump of the new oral irrigator according to claim 1 is characterized in that: The elastic pump membrane (2) is a circular elastic body, and its cross section is two "U"-shaped shapes. The middle part of the elastic pump membrane (2) is connected to the driving rod (4), and the edge of the elastic pump membrane (2) is connected to the pump body (1).

3. The water pump of the new oral irrigator according to claim 2 is characterized by: At least one annular protrusion (21) is provided on the edge of the elastic pump membrane (2) and is tightly matched with the pump body (1).

4. The water pump of the new oral irrigator according to claim 3 is characterized by: The lower end of the pump body (1) is provided with a lower bracket (7) for mounting a driving device (3) and tightly fitting and fixing the elastic pump membrane (2); the driving rod (4) is located on the lower bracket (7) and is used to connect the elastic pump membrane (2) and the driving device (3).

5. The water pump of the new oral irrigator according to claim 4 is characterized by: The edge of the elastic pump membrane (2) is also formed with a flange (22) extending and locking onto the lower bracket (7), and the upper end of the lower bracket (7) is provided with a groove (71) for locking with the flange (22); the lower end of the pump body (1) is provided with a stepped groove (11) for locking and connecting with the elastic pump membrane (2) and the lower bracket (7).

6. The water pump of the new oral irrigator according to claim 4 is characterized by: The pump body (1) and the lower bracket (7) are fastened together by means of screws (9).

7. The water pump of the new oral irrigator according to claim 1 is characterized by: The driving device (3) comprises a motor (31) installed in the lower bracket (7), a motor gear (32) arranged on the output shaft of the motor (31), and an eccentric gear (33) rotatably installed in the lower bracket (7) and connected to the driving rod (4), and the lower end of the driving rod (4) is sleeved on the eccentric gear (33).

8. The water pump of the new oral irrigator according to claim 1 is characterized by: A water inlet valve seat (8) for fixing a water inlet valve plate (6) is installed at the water inlet of the water inlet chamber (A), and the water inlet valve plate (6) comprises an outer ring portion (61) clamped and fixed between the pump body (1) and the water inlet valve seat (8), and a spring portion (62) formed in the middle of the outer ring portion (61) and capable of covering and sealing the water inlet valve seat (8), wherein the water inlet channel (81) in the water inlet valve seat (8) is smaller in size than the spring portion (62), and a pressure-changing chamber (A1) having a size larger than the spring portion (62) is provided at the water inlet of the water inlet chamber (A), and a passage is provided between the pressure-changing chamber (A1) and the water inlet chamber (A).

9. A water pump for a new oral irrigator according to any one of claims 1 to 8, characterized in that: The center of the elastic pump membrane (2) is provided with a clamping installation groove (23) with a "T"-shaped interface. The clamping installation groove (23) is sleeved on the upper part of the driving rod (4), and the upper end of the driving rod (4) is provided with a clamping protrusion (41) with a "T"-shaped cross section.

10. The water pump of the new oral irrigator according to claim 9, characterized in that: The upper part of the driving rod (4) is also provided with a limiting convex ring (42) which presses against the lower end surface of the elastic pump membrane (2) and is tightly matched with the locking convex part ().

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