Water pick and water pump thereof

Abstract

The invention relates to a water pick and a water pump thereof. The water pump comprises a pump body assembled on a support, a cylinder-barrel-shaped containing cavity is formed in the pump body, a piston and a connecting rod are arranged in the cylinder barrel, the water pump further comprises a sealing ring and a cover body, the sealing ring is in an E shape from the side view, a horn-mouth-shaped through hole is formed in the center of the sealing ring, the sealing ring is clamped to the end of the cylinder barrel through the cover body, the piston is sleeved with the through hole, and the piston is sleeved with the cover body. One end of the through hole is in interference fit with the piston, the other end of the through hole is in clearance fit with the piston, and a horn opening of the through hole faces the outside of the cylinder barrel. According to the water pump, sealing can be guaranteed in the working process, and meanwhile the working efficiency of the piston is hardly affected; and the assembly can be disassembled after assembly, so that the total cost is reduced.

Description

Technical Field

[0001] The invention relates to a water flosser, in particular to a water pump for the water flosser. Background Art

[0002] A water flosser is a device that uses high-pressure water to flush the oral cavity, clean the teeth, gaps between teeth and gums. The water pump is an important component that changes the water flow from a low-pressure state to a high-pressure state. The motor is its power source. With the support of the motor, the water pump works to provide an endless supply of high-pressure water for the water flosser.

[0003] The water pump for the water flosser includes a pump body mounted on a bracket, a piston arranged inside the pump body, a connecting rod connected to the piston, and a sealing sleeve. At present, the sealing sleeve of the water pump for the water flosser on the market needs a glue dispensing process during the assembly process, which increases the cost; and the assembled water pump will not be disassembled. This is the deficiency of the prior art. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a water pump for a water flosser, which can be disassembled after assembly and has a reduced assembly cost.

[0005] The technical solution of the present invention is: a water pump for a water flosser, comprising a pump body assembled on a bracket, the pump body being provided with a cylinder-shaped cavity, the cylinder being provided with a piston and a connecting rod, and also comprising a sealing ring and a cover body, the sealing ring being E-shaped in side view, and having a trumpet-shaped through hole in the center, the cover body clamping the sealing ring at the end of the cylinder, the through hole being sleeved on the outside of the piston, one end of which forms an interference fit with the piston, and the other end forms a clearance fit with the piston.

[0006] The trumpet opening of the through hole faces the outside of the cylinder.

[0007] The end of the cylinder has an inner step and an outer step, and the convex strip between the inner step and the outer step is inserted into the E-shaped recess.

[0008] The cover body has an inner step, and the sealing ring is entirely located on the inner step.

[0009] The piston is made of plastic.

[0010] The sealing ring is made of silicone.

[0011] Another technical solution of the present invention is: a water flosser, comprising the water pump as described above.

[0012] The technical effect of the present invention is as follows: when the connecting rod is driven by the power assembly, the piston makes a reciprocating motion in the cylinder. During this process, the sealing ring remains stationary, and the tight extrusion formed by the interference fit between the inner wall of the through hole and the outer wall of the piston realizes the sealing effect of the water flow; and because the trumpet-shaped through hole makes the interference fit occur in a very narrow area, this reduces the resistance to the movement of the piston, and while ensuring the seal, it hardly affects the working efficiency of the piston; the fixing of the sealing ring is the effect of clamping the pump body and the cover body on the bracket, avoiding the process step of gluing, so that the assembled sealing ring is detachable, reducing the assembly cost and the total cost of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an exploded view of the water pump assembly of the present invention.

[0014] Figure 2 yes Figure 1 Schematic diagram of the connection relationship of important components.

[0015] Figure 3 yes Figure 2 Assembly diagram of the . DETAILED DESCRIPTION

[0016] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0017] See also Figure 1 to Figure 3 The water pump of the present invention uses a motor (also called an electric motor) 20 as a power source. The motor 20 drives a small gear 30, and the small gear 30 drives a large gear 40. The eccentric part of the large gear 40 is pivotally connected to a connecting rod 50. The connecting rod 50 is connected to a piston 80 and can drive the piston 80 to move back and forth in a pump body 90. The pump body 90 is installed on a bracket 10 and is connected to a water inlet joint 92 and a water outlet joint 91. The reciprocating motion of the piston 80 sucks water from the water inlet joint 92, and squeezes it out from the water outlet joint 91 after pressure is applied, thereby providing a continuous high-pressure water flow for the water flosser.

[0018] A cylinder-like cavity is provided inside the pump body 90, and the cavity is connected to the water inlet joint 92 and the water outlet joint 91. A piston is provided inside the cylinder. The piston is a cylindrical body made of plastic, and the cylindrical body moves inside the cylinder. The sealing between the piston and the cylinder needs to be carefully considered.

[0019] The existing design uses an elastic sealing sleeve, one end of which is glued and fixed to the outer wall of the cylinder barrel, and the other end is glued and fixed to the outer wall of the connecting rod, thereby ensuring the sealing of the water flow without affecting the movement of the piston and the connecting rod. However, this design requires a dispensing process step, which is time-consuming and labor-intensive, and is not removable.

[0020] The present invention adopts an E-shaped sealing ring 70 to solve the above problem. The sealing ring 70 is E-shaped in side view, and has a trumpet-shaped through hole in the center. It is sleeved on the outer wall of the piston 80 through the trumpet-shaped through hole. A cover body 60 is also provided. The end of the cylinder has an inner step and an outer step. A convex strip is formed between the inner step and the outer step. The convex strip is inserted into the E-shaped concave part of the sealing ring. The end of the cover body also has an inner step. The E-shaped sealing ring is located on the inner step of the cover body as a whole. The pump body 90 with a cylinder-shaped cavity and the cover body 60 with an inner step are both installed on a bracket 10, and the sealing ring 70 is urgently stuck between the end of the cylinder and the end of the rear cover 60, so that their connection can be fixed.

[0021] The cooperation between the through hole on the sealing ring 70 and the outer wall of the piston 80 involves the general principle of cooperation between a hole and a shaft. In this embodiment, since the through hole is trumpet-shaped, one end of the through hole has a small inner diameter and the other end has a slightly larger inner diameter, in professional terms, one end is an interference fit and the other end is a clearance fit. The interference fit ensures the required sealing performance.

[0022] The sealing ring 70 is stationary, while the piston 80 moves back and forth. If the bell mouth faces the inside of the cylinder, the high-pressure water flow will penetrate into the sealing ring 70 and act on the interference fit, which is likely to break the fitting surface and lose the sealing effect, and a reliable and continuous sealing cannot be obtained. If the bell mouth faces the outside of the cylinder, when the piston moves inward, the high-pressure water flow is intercepted by the interference fit surface and has no chance to enter the through hole of the sealing ring; when the piston moves outward, the interference fit surface has an increasingly tight squeezing effect, and the high-pressure water flow is still intercepted by the interference fit surface and has no chance to enter the through hole of the sealing ring. Therefore, a reliable and continuous sealing effect can be obtained.

[0023] At the same time, the bell-shaped through hole allows the interference fit to occur in a very narrow area, which reduces the resistance of the piston movement. While ensuring the seal, it hardly affects the working efficiency of the piston.

[0024] The water pump of the present invention avoids the process step of dispensing glue during assembly, thus saving time and manpower and reducing assembly costs; although the pump is integrated after assembly, it is detachable, thus saving total costs.

[0025] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A water pump for a dental flosser, comprising a pump body mounted on a bracket, wherein a cylinder-shaped cavity is provided in the pump body, wherein a piston and a connecting rod are provided in the cylinder, wherein: It also includes a sealing ring and a cover body. The sealing ring is E-shaped when viewed from the side, and has a trumpet-shaped through hole in the center. The cover body clamps the sealing ring at the end of the cylinder barrel. The through hole is sleeved outside the piston, and one end of the through hole forms an interference fit with the piston, and the other end forms a clearance fit with the piston.

2. The water pump for a water flosser as claimed in claim 1, characterized in that: The trumpet opening of the through hole faces the outside of the cylinder.

3. The water pump for a water flosser as claimed in claim 2, characterized in that: The end of the cylinder has an inner step and an outer step, and the convex strip between the inner step and the outer step is inserted into the E-shaped recess of the sealing ring.

4. The water pump for a water flosser as claimed in claim 3, characterized in that: The cover body has an inner step, and the E-shaped sealing ring is entirely located on the inner step.

5. The water pump for a dental flosser according to any one of claims 1 to 4, characterized in that: The piston is made of plastic.

6. The water pump for a water flosser as claimed in claim 5, characterized in that: The sealing ring is made of silicone.

7. A dental flosser, characterized by: The invention comprises the water pump according to any one of claims 1 to 6.

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