Dental scaler movement with durable structure

Abstract

The utility model relates to a dental scaler movement with a durable structure, which comprises a movement shell, an elastic piston and a driving device, the driving device comprises a motor, a gear, an end face gear and a connecting rod, and the dental scaler movement is characterized in that the elastic piston comprises an annular part and a bowl-shaped deformation part which are connected into a whole, and a protection ring is sleeved outside the bowl-shaped deformation part. The dental scaler machine core with the durable structure is simple in structure, reasonable in design and high in practicability, the elastic piston is effectively protected by arranging the protection ring, it can be guaranteed that the whole circumference of the bowl-shaped deformation part is evenly stressed, abrasion is not prone to being generated, and then the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of tooth cleaners, in particular to a tooth cleaner core with a durable structure. Background Art

[0002] The movement (also called water pump) of a tooth cleaner or water flosser uses a crank-connecting rod mechanism to drive the elastic piston to move, such as the water flosser movement disclosed in Chinese patent CN114668539A. When the elastic piston is pushed by the connecting rod, its periphery will bulge outward and touch the inner wall of the movement shell. The movement shell is made of two upper and lower shells welded by ultrasonic welding, so a welding seam will be formed on the inner wall of the movement shell. When the elastic piston bulges, it will touch the welding seam. Long-term use will cause wear of the elastic piston, affecting the service life of the elastic piston. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a tooth cleaner movement with a simple structure, easy implementation, strong practicality and a durable structure, which effectively protects the elastic piston, is not easy to wear, and prolongs the service life.

[0004] The utility model is implemented by the following scheme: a tooth cleaner movement with a durable structure, including a movement shell, an elastic piston and a driving device, the driving device includes a motor, a gear, an end gear and a connecting rod, the elastic piston includes an annular portion and a bowl-shaped deformation portion connected as one body, and a protective ring is provided on the outside of the bowl-shaped deformation portion.

[0005] Furthermore, a limiting hole adapted to the annular portion of the elastic piston is provided at the front end of the movement shell, a limiting hole step is provided in the limiting hole which presses against the rear end face of the annular portion of the elastic piston, the outer periphery of the protective ring is in a stepped shape with a large and a small diameter, the large diameter section of the protective ring is located at the front side of the limiting hole step and is inserted into an annular groove formed between the rear end portion of the annular portion and the edge portion of the bowl-shaped deformation portion, and the small diameter section of the protective ring is located in the middle of the limiting hole step.

[0006] Furthermore, an eccentric wheel is provided on the end face gear, a slot hole cooperating with the eccentric wheel is provided at the rear end of the connecting rod, and a wear-resistant lining plate is provided between the eccentric wheel and the inner wall of the slot hole.

[0007] Furthermore, the slot is a long slot and its length direction is perpendicular to the axis of the elastic piston. Both ends of the slot length direction leave space for the eccentric wheel to swing left and right so that the eccentric wheel drives the connecting rod to reciprocate forward and backward when the end gear rotates.

[0008] Furthermore, the wear-resistant lining is in an inverted U shape and is embedded in the slot hole. The side plates on both sides of the wear-resistant lining are blocked between the eccentric wheel and the long sides of the slot hole. A guide long hole is opened on the top of the wear-resistant lining for sliding cooperation with the gear shaft of the end gear. The length direction of the guide long hole is parallel to the axis of the elastic piston.

[0009] Further, a buckle cover portion covering the eccentric wheel is provided at the rear end of the connecting rod. The slot hole is located below the buckle cover portion. A relief long hole communicating with the slot hole and located above the guiding long hole is formed in the upper side of the buckle cover portion. The upper end of the gear shaft of the face gear passes through the relief long hole.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] (1) The structure is simple, easy to implement, reasonably designed, and has strong practicability. By providing a protective ring, the elastic piston can be effectively protected, ensuring that the bowl-shaped deformation portion is uniformly stressed throughout the circumference, not easily worn, and thus the service life is extended.

[0012] (2) By providing a wear-resistant lining plate in contact with the eccentric wheel, direct contact between the inner wall of the slot hole and the eccentric wheel can be avoided, reducing the wear of the inner wall of the slot hole and preventing the connecting rod from being unable to work stably or the movement stroke not reaching the position due to the gap caused by wear.

[0013] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below through specific embodiments and related drawings. Description of the Drawings

[0014] Figure 1 is a three-dimensional view of the tooth cleaner movement of the embodiment of the present utility model;

[0015] Figure 2 is a three-dimensional view of the internal structure of the tooth cleaner movement of the embodiment of the present utility model;

[0016] Figure 3 is a schematic diagram of a partial structure of the tooth cleaner movement of the embodiment of the present utility model;

[0017] Figure 4 is Figure 3 a longitudinal sectional view of;

[0018] Figure 5 is Figure 3 a transverse sectional view of;

[0019] Explanation of the reference numerals in the drawings: B - movement, 100 - movement housing, 110 - elastic piston, 111 - annular portion, 112 - bowl-shaped deformation portion, 113 - annular cavity, 120 - water outlet seat, 130 - motor, 140 - gear, 150 - face gear, 151 - gear shaft, 152 - eccentric wheel, 160 - connecting rod, 161 - slot hole, 162 - buckle cover portion, 163 - relief long hole, 170 - protective ring, 180 - wear-resistant lining plate, 181 - guiding long hole, 190 - wear-resistant sleeve. Detailed Embodiment

[0020] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0021] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0022] As Figures 1 - 5 shown, a dental irrigator movement with a durable structure includes a movement housing 100, an elastic piston 110, and a driving device. A water outlet seat 120 with a piston cavity is provided at the front end of the movement housing 100. The elastic piston is arranged at the rear end of the water outlet seat 120. The water outlet end of the water outlet seat can be directly connected to a nozzle or can be connected to a handle with a nozzle through a hose. The water outlet seat 120 is a prior art and can adopt the upper housing structure in the dental irrigator of Chinese Patent CN114668539A or the water outlet seat structure in a desktop dental irrigator and its working method of Chinese Patent CN116549157A. The driving device includes a motor 130, a gear 140, an end face gear 150, and a connecting rod 160. The elastic piston 110 includes an integrally connected annular portion 111 and a bowl-shaped deformation portion 112. A protective ring 170 is sleeved outside the bowl-shaped deformation portion. The protective ring 170 is made of a metal material, specifically stainless steel or alloy. The elastic piston 110 is made of materials such as a plastic film or a silicone film. The motor drives the bowl-shaped deformation portion of the elastic piston through the driving device, thereby realizing the water inlet and outlet of the water outlet seat. In the present utility model, a protective ring is provided on the outer periphery of the bowl-shaped deformation portion of the elastic piston, effectively protecting the elastic piston. When the bowl-shaped deformation portion is pushed forward and bulges outwards, it only contacts the protective ring and does not touch the movement housing. Since the inner wall of the protective ring is smooth and uniform, it can ensure that the bowl-shaped deformation portion is evenly stressed throughout the circumference, is not easily worn, and thus extends the service life.

[0023] In this embodiment, a limiting hole 111 adapted to the annular portion of the elastic piston 110 is provided at the front end of the movement housing 100, and a limiting hole step 112 is provided in the limiting hole to press against the rear end surface of the annular portion of the elastic piston. The outer periphery of the protective ring is stepped with a large and a small diameter. The large diameter section of the protective ring is located at the front side of the limiting hole step and is inserted into an annular groove cavity 113 formed between the rear end of the annular portion and the edge of the bowl-shaped deformation portion. The small diameter section of the protective ring is located in the middle of the limiting hole step, and is then blocked between the bowl-shaped deformation portion of the elastic piston and the limiting hole step 112. The limiting hole step 112 can also effectively limit the protective ring to prevent it from falling off.

[0024] In this embodiment, an eccentric wheel 152 is provided on the end face gear 150, and the eccentric wheel 152 and the end face gear 150 are an integrated structure. A slot hole 161 cooperating with the eccentric wheel is provided at the rear end of the connecting rod, and a wear-resistant lining plate 180 is provided between the eccentric wheel 151 and the inner wall of the slot hole 161. By setting the wear-resistant lining plate in contact with the eccentric wheel, direct contact between the inner wall of the slot hole and the eccentric wheel is avoided, which can reduce the wear of the inner wall of the slot hole, avoid the gap caused by wear, and prevent the connecting rod from being unable to work stably or the movement stroke from being in place, and also reduce noise.

[0025] In this embodiment, the slot hole 161 is a long slot hole and its length direction is perpendicular to the axis of the elastic piston. The two ends of the slot hole in the length direction leave space for the eccentric wheel to swing left and right so that the eccentric wheel drives the connecting rod to reciprocate forward and backward when the end gear rotates. The front end of the connecting rod is provided with a clamping joint part, and the middle part of the rear end of the elastic piston is provided with a clamping groove that is engaged with the clamping joint part, thereby realizing the connection between the connecting rod and the elastic piston. Since the slot hole is a long slot hole structure, the swinging movement of the eccentric wheel in the left and right direction will not drive the connecting rod to swing left and right, and only the swinging movement in the up and down direction will drive the connecting rod to move forward and backward, ensuring that the connecting rod only moves in the forward and backward direction without swinging left and right, thereby preventing the connection part between the connecting rod and the elastic piston from loosening.

[0026] In this embodiment, the wear-resistant lining 180 is in an inverted U shape and is embedded in the slot 161. The side plates on both sides of the wear-resistant lining are blocked between the eccentric wheel and the long sides of the slot. A guide long hole 181 that slides with the gear shaft of the end gear is opened on the top of the wear-resistant lining. The length direction of the guide long hole 181 is parallel to the axial center line of the elastic piston. By opening the guide long hole 181 that cooperates with the gear shaft on the wear-resistant lining, the forward and backward movement of the connecting rod can be guided to ensure that the connecting rod can stably perform reciprocating linear motion in the forward and backward directions without causing left and right deviation. At the same time, the guide long hole 181 is not easy to wear, ensuring the guiding effect of stable length.

[0027] In this embodiment, a buckle cover portion 162 covering the eccentric wheel is provided at the rear end of the connecting rod 160. The slot hole 161 is located below the buckle cover portion 162. A relief long hole 163 communicating with the slot hole and located above the guiding long hole is formed in the upper side of the buckle cover portion. The upper end of the gear shaft of the face gear passes through the relief long hole 163. The length direction of the relief long hole 163 is also parallel to the axis line of the elastic piston, and the width and length of the relief long hole 163 can be slightly larger than those of the guiding long hole 181.

[0028] In this embodiment, limiting slot holes respectively rotatably mating with the ends of the gear shafts 151 of the face gears are provided at the inner top and inner bottom of the movement housing 100. Wear-resistant sleeves 190 are embedded in the limiting slot holes. The wear-resistant sleeves 190 are made of copper material. By providing the wear-resistant sleeves, wear of the limiting slot holes of the movement housing can be avoided, ensuring the long-term stable operation of the gear shafts of the face gears.

[0029] For any of the technical solutions disclosed by the present utility model as described above, unless otherwise stated, if a numerical range is disclosed, the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is only the numerical values with obvious technical effects or representativeness among many feasible numerical values. Since there are too many numerical values to list exhaustively, only some numerical values are disclosed in the present utility model to illustrate the technical solutions of the present utility model. Moreover, the listed numerical values should not constitute a limitation to the protection scope of the present invention.

[0030] If the present utility model discloses or involves components or structural members that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (such as connection using bolts or screws), or can also be understood as: a non-detachable fixed connection (such as riveting, welding). Of course, the mutual fixed connection can also be replaced by an integral structure (such as manufactured by integral forming using casting process) (except when it is obviously impossible to adopt the integral forming process).

[0031] In addition, for any of the technical solutions disclosed by the present utility model as described above, the terms used to represent the positional relationship or shape, unless otherwise stated, include states or shapes that are approximate, similar, or close to it.

[0032] Any component provided by the present utility model can either be assembled from a plurality of separate components or be a single component manufactured by an integral forming process.

[0033] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical content of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A tooth cleaner movement with a durable structure, comprising a movement housing, an elastic piston and a driving device, wherein the driving device comprises a motor, a gear, an end gear and a connecting rod, characterized in that: The elastic piston comprises an annular portion and a bowl-shaped deformation portion which are connected as one body, and a protective ring is sleeved on the outside of the bowl-shaped deformation portion.

2. The toothbrush cartridge with a durable structure according to claim 1, characterized in that: A limiting hole matching the annular portion of the elastic piston is provided at the front end of the movement shell, a limiting hole step is provided in the limiting hole which presses against the rear end surface of the annular portion of the elastic piston, the outer periphery of the protective ring is in a stepped shape with one large and one small diameter, the large diameter section of the protective ring is located at the front side of the limiting hole step and is inserted into the annular groove formed between the rear end of the annular portion and the edge of the bowl-shaped deformation portion, and the small diameter section of the protective ring is located in the middle of the limiting hole step.

3. The tooth cleaner movement with a durable structure according to claim 1, characterized in that: An eccentric wheel is arranged on the end face gear, a slot hole cooperating with the eccentric wheel is arranged at the rear end of the connecting rod, and a wear-resistant lining plate is arranged between the eccentric wheel and the inner wall of the slot hole.

4. The tooth cleaner movement with a durable structure according to claim 3, characterized in that: The slot hole is a long slot hole and its length direction is perpendicular to the axis of the elastic piston. Both ends of the slot hole in the length direction leave space for the eccentric wheel to swing left and right so that the eccentric wheel drives the connecting rod to reciprocate forward and backward when the end gear rotates.

5. The tooth cleaner movement with a durable structure according to claim 4, characterized in that: The wear-resistant lining is in an inverted U shape and embedded in the slot hole. The side plates on both sides of the wear-resistant lining are blocked between the eccentric wheel and the long sides of the slot hole. A guide long hole is opened on the top of the wear-resistant lining for sliding cooperation with the gear shaft of the end gear. The length direction of the guide long hole is parallel to the axis of the elastic piston.

6. The tooth cleaner movement with a durable structure according to claim 5, characterized in that: The rear end of the connecting rod is provided with a buckle cover part covering the eccentric wheel, the slot hole is located on the lower side of the buckle cover part, and the upper side of the buckle cover part is provided with a long clearance hole which is connected with the slot hole and is located above the guide long hole, and the upper end of the gear shaft of the end face gear passes through the long clearance hole.

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