A piston pump body and a dental flosser with the same

Abstract

The present invention provides a piston pump body, comprising: a piston, one end of which is sleeved within a pump housing and the other end of which is connected to a piston rod, the piston rod being driven by a drive assembly and configured to reciprocate within the pump housing; and a retaining ring provided on the outer wall of the piston end proximal to the piston rod, the retaining ring being configured to seal the piston pump and the piston. The present invention is intended to improve the piston pump body, thereby enhancing the airtightness of the piston, further improving the water pressure stability of a water irrigator, and reducing the reduction in cleaning efficiency during use of the water irrigator due to unstable water pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of oral irrigators, and in particular to a piston pump body and an oral irrigator with the piston pump body. Background Art

[0002] An oral irrigator is an auxiliary tool for cleaning the oral cavity. It uses a pulsed water flow to clean the teeth and the spaces between teeth. Compared with traditional cleaning methods such as toothpicks or dental floss, it is safer and more effective, and can minimize damage to the gums during the cleaning process.

[0003] At present, the piston pumps used in existing water flossers will cause unstable water pressure during operation due to their structural characteristics. The main reason depends on the airtightness of the piston structure, which will greatly reduce the cleaning efficiency of the water flosser. Therefore, there is a lack of a piston structure that can improve the airtightness of the piston, thereby ensuring that the water pressure of the water flosser will not be unstable due to the weak airtightness of the piston during operation. Summary of the Invention

[0004] The present invention provides a piston pump body and a water flosser with the piston pump body, which are used to improve the piston pump body, thereby improving the airtightness of the piston, further improving the water pressure stability of the water flosser, and reducing the reduction in cleaning efficiency during use of the water flosser due to unstable water pressure.

[0005] The present invention provides a piston pump body, comprising: a piston, one end of which is sleeved in a pump housing, and the other end of which is connected to a piston rod, wherein the piston rod is driven by a drive assembly and is used to perform reciprocating motion in the pump housing;

[0006] A limit ring is provided on the outer wall of one end of the piston close to the piston rod, and the limit ring is used to seal the piston pump and the piston.

[0007] Preferably, a pump chamber is provided in the pump housing, and the end of the piston away from the piston rod is sleeved in the pump chamber and is used for reciprocating movement in the pump chamber;

[0008] The lower bottom surface of the pump compartment is provided with a pump casing water outlet, and the pump casing water outlet is used to connect the water outlet component through an adapter;

[0009] A pump casing water inlet is provided on the lower side wall of the pump casing, and the pump casing water inlet is used to connect the water inlet assembly; a communication port is provided between the pump compartment and the pump casing water outlet, and between the pump compartment and the pump casing water inlet;

[0010] A piston hole is provided in the piston, and an open end of the piston hole is used for inserting a piston rod, and the piston rod is used to drive the piston.

[0011] Preferably, a first slot is provided on the circumferential outer wall of one end of the piston close to the pump chamber, and a sealing ring is provided in each of the first slots, and the sealing ring is used to seal the gap between the pump housing and the piston; the outer diameter of the piston is d from top to bottom; and the end of the piston close to the bottom of the pump chamber is set as an arc-shaped bottom surface.

[0012] Preferably, an annular groove is provided at one end of the piston close to the pump chamber, a raised platform is formed at the center of the annular groove, a conical head is provided at the lower end of the piston, the small diameter end of the conical head is connected to the lower end of the piston, and the large diameter end of the conical head is close to the bottom of the pump chamber.

[0013] Preferably, a piston ball is provided at one end of the piston rod, and the piston ball is used to cooperate with the piston hole to drive the piston, and the other end of the piston rod is connected to a rotating sleeve, and the rotating sleeve is sleeved on a limit sleeve, and the limit sleeve is provided on one side of the crown gear, and the limit sleeve and the crown gear are both sleeved on the connecting shaft, and the limit sleeve and the rotating sleeve are coaxially arranged, and the crown gear and the connecting shaft are coaxially arranged; the axis of the limit sleeve and the axis of the crown gear are spaced apart;

[0014] The crown gear meshes with the copper gear, and the copper gear is connected to the driving end of the motor. A waterproof sleeve is provided at one end of the motor driving end close to the copper gear.

[0015] The present invention provides a water flosser suitable for the piston pump body, which includes a bracket, one side of the bracket is connected to the piston pump body, and the other side of the bracket is connected to the control panel. A U-shaped shell is provided on the side of the bracket close to the control panel. The U-shaped shell is used to be buckled on the outside of the piston rod, the limiting sleeve, and the rotating sleeve, and is used to connect the connecting shaft.

[0016] Preferably, it further comprises an inner shell, wherein a battery compartment is provided on a side of the inner shell close to the control board, wherein batteries are provided in the battery compartment, and the batteries are electrically connected to the control board and the motor respectively;

[0017] The inner shell is also used to wrap the motor, and a drainage pipe is provided in the inner shell, one end of the drainage pipe is connected to the nozzle waterproof assembly, and the other end is connected to the water outlet assembly, and the nozzle waterproof assembly is connected to the water outlet nozzle.

[0018] Preferably, one end of the water outlet assembly away from the pump housing is connected to a water inlet silicone tube, and the other end of the water inlet silicone tube is provided with a water inlet positioning filter tube;

[0019] It also includes an outer shell, which is used to be mounted on the outside of the bracket, motor, and piston pump body. A water tank is provided inside the lower end of the outer shell. The water inlet positioning filter pipe is located in the water tank and is used to filter the water in the water tank and drain it into the pump casing.

[0020] Preferably, a water inlet is provided on the side wall of the water tank, and the water inlet is used to inject water into the water tank;

[0021] A cover is hinged on the outside of the water inlet, and the cover is hinged on the outside of the water inlet through a torsion spring;

[0022] A charging port is provided above the water inlet, and the charging port is used to charge the battery. An anti-slip protrusion is provided on the back of the shell near the charging port;

[0023] A keypad is provided on the front of the housing, and function keys and a switch key are respectively provided on the keypad.

[0024] Preferably, the control panel is provided with a plurality of pressure sensors, and each of the pressure sensors corresponds to a function key and a switch key one by one.

[0025] The working principle and beneficial effects of the present invention are as follows:

[0026] The present invention provides a piston pump body, comprising: a piston, one end of which is sleeved within a pump housing and the other end of which is connected to a piston rod, the piston rod being driven by a drive assembly and configured to reciprocate within the pump housing; and a retaining ring provided on the outer wall of the piston end proximal to the piston rod, the retaining ring being configured to seal the piston pump and the piston. The present invention is intended to improve the piston pump body, thereby enhancing the airtightness of the piston, further improving the water pressure stability of a water irrigator, and reducing the reduction in cleaning efficiency during use of the water irrigator due to unstable water pressure.

[0027] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0028] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 This is a schematic diagram of the piston pump structure of the present invention;

[0031] Figure 2a This is a schematic diagram of a piston structure of the present invention;

[0032] Figure 2b This is a schematic diagram of another piston pump structure of the present invention;

[0033] Figure 3a is a cross-sectional schematic diagram of one of the piston structures of the present invention;

[0034] Figure 3b is a cross-sectional schematic diagram of another piston structure of the present invention;

[0035] Figure 4 This is a schematic diagram of the motor connection structure of the present invention;

[0036] Figure 5 This is a schematic diagram of the support connection structure of the present invention;

[0037] Figure 6 This is a schematic diagram of the water outlet connection structure of the present invention;

[0038] Figure 7 This is a schematic diagram of the connection structure between the battery and the control board of the present invention;

[0039] Figure 8 This is a schematic diagram of the inner shell connection structure of the present invention;

[0040] Figure 9 This is a schematic diagram of the water inlet structure of the oral irrigator of the present invention;

[0041] Figure 10 This is a schematic diagram of the front three-dimensional structure of the oral irrigator of the present invention;

[0042] Figure 11 This is a schematic diagram of the back three-dimensional structure of the oral irrigator of the present invention;

[0043] Figure 12 This is a schematic diagram of the piston transverse centerline marking structure of the present invention.

[0044] Among them, 1-piston, 2-piston hole, 3-limiting retaining ring, 4-first notch, 5-sealing ring, 6-arc bottom surface, 7-pump housing, 8-piston rod, 9-crown gear, 10-waterproof shaft sleeve, 11-connecting shaft, 12-limiting sleeve, 13-swivel sleeve, 14-piston ball, 15-pump housing water outlet, 16-connecting port, 17-pump housing water inlet, 18-valve plate, 19-copper gear, 20-motor, 21-water inlet assembly, 22-water outlet assembly, 23-U-shaped housing, 24-bracket, 25-water outlet nozzle, 26-sprinkler waterproof assembly, 27-drainage tube, 28-adapter, 29-battery, 30-control board, 31-inner housing, 32-water inlet positioning filter ball, 33-water inlet silicone tube, 34-outer housing, 35-water filling port, 36-water tank,

[0045] 37- raised platform, 38- annular groove, 39- pump chamber, 40- keypad, 41- cover, 42- function key, 43- power key, 44- anti-slip protrusion, 45- charging port, 46- horizontal center line, 47- z-axis. DETAILED DESCRIPTION

[0046] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0047] Example 1

[0048] according to Figure 1-11 As shown, an embodiment of the present invention provides a piston 1 pump body, comprising: a piston 1, one end of the piston 1 being sleeved in a pump housing 7, and the other end being connected to a piston rod 8, the piston rod 8 being driven by a drive assembly and configured to perform reciprocating motion in the pump housing 7;

[0049] A limit ring 3 is provided on the outer wall of one end of the piston 1 close to the piston rod 8 , and the limit ring 3 is used to seal the piston 1 pump and the piston 1 .

[0050] In the present invention, by arranging a limit ring 3 on the piston 1, the range of movement of the piston 1 in the pump housing 7 can be limited. It can also be achieved that when the bottom end of the piston 1 is driven to the bottom of the pump housing 7 by the piston rod 8, the limit ring 3 can block the gap between the piston 1 and the pump housing 7 while limiting the range of movement, thereby reducing the overflow of liquid in the pump housing 7.

[0051] Furthermore, in one embodiment, a pump chamber 39 is provided in the pump housing 7, and the end of the piston 1 away from the piston rod 8 is sleeved in the pump chamber 39 and is used to reciprocate in the pump chamber 39;

[0052] The lower bottom surface of the pump chamber 39 is provided with a pump housing water outlet 15, and the pump housing water outlet 15 is used to connect to the water outlet assembly 22 through the adapter 28;

[0053] A pump housing water inlet 17 is provided on the lower side wall of the pump housing 7, and the pump housing water inlet 17 is used to connect to the water inlet assembly 21; a communication port 16 is provided between the pump compartment 39 and the pump housing water outlet 15, and between the pump compartment 39 and the pump housing water inlet 17; a valve plate 18 is provided in the pump housing water inlet 17;

[0054] A piston hole 2 is provided in the piston 1 , and an open end of the piston hole 2 is used for inserting a piston rod 8 , and the piston rod 8 is used to drive the piston 1 .

[0055] In this embodiment, the water inlet assembly 21 of the pump housing 7 is used to drain the water in the water tank 36 into the pump housing 7, and then after being pushed by the piston rod 8, the piston 1 is used to pump the water into the water outlet assembly 22, and then the water is drained to the water outlet nozzle 24 of the water flosser through the water outlet assembly 22, thereby achieving the purpose of the water flosser being able to output water to clean the gaps between teeth.

[0056] Specifically, in one embodiment, a first slot 4 is provided on the circumferential outer wall of one end of the piston 1 close to the pump chamber 39, and a sealing ring 5 is provided in each of the first slots 4. The sealing ring 5 is used to seal the gap between the pump housing 7 and the piston 1; the outer diameter of the piston 1 is d from top to bottom; and the end of the piston 1 close to the bottom of the pump chamber 39 is set as an arc-shaped bottom surface 6.

[0057] In this embodiment, when the piston 1 is working, the sealing ring 5 embedded in the first groove 4 can seal the gap between the outer wall of the piston 1 and the inner wall of the pump chamber 39, so that the piston 1 pump body can better control the water flow output, reduce the situation of insufficient pump pressure due to poor sealing, and further reduce the situation of insufficient water pressure at the water outlet 24 due to insufficient pump pressure, thereby ensuring that the water pressure at the water outlet 24 can meet the purpose of cleaning water pressure, and further ensuring cleaning efficiency and effect.

[0058] In one embodiment, a piston ball 14 is provided at one end of the piston rod 8, and the piston ball 14 is used to cooperate with the piston hole 2 to drive the piston 1. The other end of the piston rod 8 is connected to a rotating sleeve 13, and the rotating sleeve 13 is sleeved on a limiting sleeve 12. The limiting sleeve 12 is provided on one side of the crown gear 9. The limiting sleeve 12 and the crown gear 9 are both sleeved on the connecting shaft 11. The limiting sleeve 12 and the rotating sleeve 13 are coaxially arranged, and the crown gear 9 and the connecting shaft 11 are coaxially arranged; the axis of the limiting sleeve 12 and the axis of the crown gear 9 are spaced apart;

[0059] The crown gear 9 meshes with the copper gear 19 , and the copper gear 19 is connected to the driving end of the motor 20 . A waterproof sleeve 10 is provided at one end of the driving end of the motor 20 close to the copper gear 19 .

[0060] In this embodiment, when the motor 20 is working, the driving end of the motor 20 rotates with the copper gear 19, and the copper gear 19 engages with the crown gear 9 and causes the crown gear 9 to rotate. After the crown gear 9 rotates, it will move with the limiting sleeve 12. The limiting sleeve 12 and the rotating sleeve 13 are both eccentrically arranged with respect to the axis of the crown gear 9, so that when the motor 20 rotates, the crown gear 9 moves circumferentially, and the piston rod 8 connected to the rotating sleeve 13 can swing up and down, and the piston rod 8 can push the piston 1 to reciprocate in the pump chamber 39 of the pump housing 7 with the piston ball 14, thereby achieving the purpose of pumping out the water in the pump chamber 39.

[0061] Example 2

[0062] according to Figure 1 、 Figure 2a 、 Figure 3a 、 Figure 4-11 As shown, the present invention provides a piston 1 pump body, comprising: a piston 1, one end of the piston 1 is sleeved in a pump housing 7, and the other end is connected to a piston rod 8, the piston rod 8 is driven by a drive assembly and is used to reciprocate in the pump housing 7;

[0063] A limit ring 3 is provided on the outer wall of one end of the piston 1 close to the piston rod 8 , and the limit ring 3 is used to seal the piston 1 pump and the piston 1 .

[0064] The present invention is used to improve the piston 1 pump body, thereby improving the airtightness of the piston 1, further improving the water pressure stability of the water flosser, and reducing the reduction in cleaning efficiency during the use of the water flosser due to unstable water pressure.

[0065] In one embodiment, a pump chamber 39 is provided in the pump housing 7, and the end of the piston 1 away from the piston rod 8 is sleeved in the pump chamber 39 and is used to reciprocate in the pump chamber 39;

[0066] The lower bottom surface of the pump chamber 39 is provided with a pump housing water outlet 15, and the pump housing water outlet 15 is used to connect to the water outlet assembly 22 through the adapter 28;

[0067] A pump housing water inlet 17 is provided on the lower side wall of the pump housing 7, and the pump housing water inlet 17 is used to connect to the water inlet assembly 21; a communication port 16 is provided between the pump compartment 39 and the pump housing water outlet 15, and between the pump compartment 39 and the pump housing water inlet 17;

[0068] A piston hole 2 is provided in the piston 1 , and an open end of the piston hole 2 is used for inserting a piston rod 8 , and the piston rod 8 is used to drive the piston 1 .

[0069] In this embodiment, the water inlet assembly 21 of the pump housing 7 is used to drain the water in the water tank 36 into the pump housing 7, and then after being pushed by the piston rod 8, the piston 1 is used to pump the water into the water outlet assembly 22, and then the water is drained to the water outlet nozzle 24 of the water flosser through the water outlet assembly 22, thereby achieving the purpose of the water flosser being able to output water to clean the gaps between teeth.

[0070] Specifically, in one embodiment, an annular groove 38 is provided at one end of the piston 1 close to the pump chamber 39, and a raised platform 37 is formed in the center of the annular groove 38. A conical head is provided at the lower end of the piston 1, and the small diameter end of the conical head is connected to the lower end of the piston 1, and the large diameter end of the conical head is close to the bottom of the pump chamber 39.

[0071] In this embodiment, a cylindrical structure is further extended from the large diameter end of the conical head at the lower end of the piston 1, and an annular groove 38 is provided at the end of the cylindrical structure. A raised platform 37 is provided at the annular center of the annular groove 38. During the reciprocating motion of the piston 1, the raised platform 37 and the annular groove 38 in the center cooperate with each other to increase the pump pressure and increase the output pressure of the water flow, thereby improving the cleaning efficiency. Notice: the conical structure of the lower end of the piston 1 can reduce the gap between the outer wall of the piston 1 and the inner wall of the pump chamber 39, thereby reducing the overflow of water flow, and further reducing the unstable pump pressure caused by the overflow of water flow.

[0072] In one embodiment, a piston ball 14 is provided at one end of the piston rod 8, and the piston ball 14 is used to cooperate with the piston hole 2 to drive the piston 1. The other end of the piston rod 8 is connected to a rotating sleeve 13, and the rotating sleeve 13 is sleeved on a limiting sleeve 12. The limiting sleeve 12 is provided on one side of the crown gear 9. The limiting sleeve 12 and the crown gear 9 are both sleeved on the connecting shaft 11. The limiting sleeve 12 and the rotating sleeve 13 are coaxially arranged, and the crown gear 9 and the connecting shaft 11 are coaxially arranged; the axis of the limiting sleeve 12 and the axis of the crown gear 9 are spaced apart;

[0073] The crown gear 9 meshes with the copper gear 19 , and the copper gear 19 is connected to the driving end of the motor 20 . A waterproof sleeve 10 is provided at one end of the driving end of the motor 20 close to the copper gear 19 .

[0074] In this embodiment, when the motor 20 is working, the driving end of the motor 20 rotates with the copper gear 19, and the copper gear 19 engages with the crown gear 9 and causes the crown gear 9 to rotate. After the crown gear 9 rotates, it will move with the limiting sleeve 12. The limiting sleeve 12 and the rotating sleeve 13 are both eccentrically arranged with respect to the axis of the crown gear 9, so that when the motor 20 rotates, the crown gear 9 moves circumferentially, and the piston rod 8 connected to the rotating sleeve 13 can swing up and down, and the piston rod 8 can push the piston 1 to reciprocate in the pump chamber 39 of the pump housing 7 with the piston ball 14, thereby achieving the purpose of pumping out the water in the pump chamber 39.

[0075] Example 3

[0076] according to Figure 1-11 As shown, the present invention provides a water flosser suitable for the piston 1 pump body, which includes a bracket 24, one side of the bracket 24 is connected to the piston 1 pump body, and the other side of the bracket 24 is connected to the control board 30. The bracket 24 is provided with a U-shaped shell 23 on the side close to the control board 30. The U-shaped shell 23 is used to be buckled on the outside of the piston rod 8, the limiting sleeve 12, and the rotating sleeve 13, and is used to connect the connecting shaft 11.

[0077] Preferably, it further comprises an inner shell 31, wherein a battery 29 compartment is provided on one side of the inner shell 31 close to the control board 30, wherein the battery 29 compartment is provided with a battery 29, and the battery 29 is electrically connected to the control board 30 and the motor 20 respectively;

[0078] The inner shell 31 is also used to wrap the motor 20, and a drainage pipe 27 is provided in the inner shell 31. One end of the drainage pipe 27 is connected to the nozzle waterproof component 26, and the other end is connected to the water outlet component 22. The nozzle waterproof component 26 is connected to the water outlet nozzle 24.

[0079] One end of the water outlet assembly 22 away from the pump housing 7 is connected to the water inlet silicone tube 33, and the other end of the water inlet silicone tube 33 is provided with a water inlet positioning filter tube;

[0080] It also includes an outer shell 34, which is used to be mounted on the outside of the bracket 24, the motor 20, and the piston 1 pump body. A water tank 36 is provided inside the lower end of the outer shell 34. The water inlet positioning filter pipe is located in the water tank 36 and is used to filter the water in the water tank 36 and drain it into the pump casing 7.

[0081] The side wall of the water tank 36 is provided with a water inlet 35, and the water inlet 35 is used to fill water into the water tank 36; the outer side of the water inlet 35 is hinged with a cover 41, and the cover 41 is hinged to the outer side of the water inlet 35 through a torsion spring; the cover is also provided with a rubber plug, which is used to close the water inlet.

[0082] A charging port 45 is provided above the water inlet 35 , and the charging port 45 is used to charge the battery 29 . An anti-slip protrusion 44 is provided on the back of the housing 34 near the charging port 45 .

[0083] A keypad 40 is provided on the front of the housing 34 , and function keys 42 and a switch key 43 are provided on the keypad 40 .

[0084] The control panel 30 is provided with a plurality of pressure sensors, each of which corresponds to a function key 42 and a switch key 43 .

[0085] In this embodiment, the pressure sensor provided on the control panel 30 replaces the traditional touch button, which can improve the triggering efficiency of the function key 42 or the switch key 43, and reduce the situation where the traditional touch button cannot start normally due to insufficient triggering force; at the same time, the service life of the pressure sensor can reach more than 10 years, while the service life of the touch button with a shrapnel structure is determined by the quality of the shrapnel, which can be as long as 5-8 years or as short as 2-3 years. The shrapnel structure loses its elasticity or fails, thereby causing the shrapnel to be unable to be used normally.

[0086] When the water flosser is working, open the flip cover, use the water inlet 35 to fill the water tank 36 with water, then start the power button 43, and use the function key 42 to select the corresponding punching mode according to needs. The water inlet positioning filter ball 32 filters the water in the water tank 36 and drains it to the water inlet component 21 through the water inlet silicone tube 33, and then drains it into the pump housing 7 through the water inlet component 21; the motor 20 starts working and drives the piston rod 8, so that the piston rod 8 drives the piston 1 to reciprocate. When the piston 1 reciprocates, it is pressed down by the piston rod 8, and when it moves upward, it is pushed upward by water pressure; the reciprocating motion of the piston 1 can realize the water in the pump tank 39 to be pumped out to the water outlet component 22, and then drained to the drainage pipe 27 through the water outlet component 22, and the water is drained to the water outlet nozzle 24 through the drainage pipe 27, thereby completing the water flow output of the water flosser and achieving the purpose of cleaning the teeth or tooth gaps.

[0087] The inner shell 31 is also provided with a cooling component, which is used to cool the motor 20 and the battery 29. While cooling the battery 29 and the motor 20, the heat of the battery 29 and the motor 20 can also be used to heat the water in the drainage tube 27, thereby reducing the user's oral or gum discomfort caused by the low water temperature during use.

[0088] The cooling component includes a cooling pipe, which can replace the drainage tube 27 and is coiled around the outside of the motor 20 and the battery 29. It is used to cool the temperature generated by the operation of the motor 20, and further use the temperature generated by the motor 20 and the battery 29 to heat the water in the drainage tube 27 (cooling pipe), so that the water temperature during the user's teeth flushing process can be increased, reducing oral discomfort caused by low temperature.

[0089] In one embodiment, after the motor 20 of the present invention is in operation, the mutual engagement of the copper gear and the crown gear will further realize the reciprocating motion of the piston rod. When there is water in the pump housing, the piston rod further pushes the piston to push, thereby achieving the purpose of pumping water from the pump housing into the drainage pipe 27 or the cooling component;

[0090] However, during actual use, there is a tolerance between the pump housing and the piston, and the working state of the two is a reciprocating motion state. During the reciprocating motion, once there is a jam between the pump housing and the piston, the motor still works, which will cause the motor to burn out or the piston rod to be damaged. For this reason, the present invention also includes a motor control method, which is used to judge the jam between the pump housing and the piston, and adjust the motor speed or the motor movement direction based on the judgment result, so as to eliminate or reduce the situation where the pump housing and the piston are damaged due to jamming.

[0091] The motor control method comprises:

[0092] Obtain the position parameters of the piston on the pump housing and establish a tolerance model of the piston;

[0093] The position offset range of the piston is obtained based on the position parameter. If the maximum error range is greater than the first preset value, the motor speed is reduced; if the maximum error range is greater than the second preset value, an alarm instruction is generated and sent to the alarm unit for alarm.

[0094] The position parameter of the piston in the pump housing can be obtained by embedding a distance sensor in the inner wall or interior of the pump housing; and / or the pump housing is set as a transparent structure, and a distance sensor is set outside the pump housing.

[0095] like Figure 12 As shown, the tolerance model of the piston is the cylindricity model of the piston, which includes a translation vector model and a rotation vector model. The translation vector model is expressed by formula (1):

[0096]

[0097] The rotation vector model is expressed by formula (2):

[0098]

[0099] Where l is the piston length, S u is the absolute value of the outer diameter deviation of the piston, S d is the absolute value of the lower deviation of the outer diameter of the piston, S i is the tolerance value of the piston; P r is the translation vector of the horizontal gap between the piston and the pump housing, P z is the z-axis translation vector of the piston, D r D is the rotation vector of the piston along the transverse centerline and the pump housing. z is the z-axis rotation vector of the piston;

[0100] The piston position offset range obtained based on the position parameters also includes:

[0101] The position offset range of the piston is calculated using the screw model combined with the piston cylindricity model.

[0102] A three-dimensional model of the pump housing and the piston is constructed, and the spin model is obtained based on the three-dimensional model. The spin model is expressed using formula (3):

[0103]

[0104] Among them, G is the motion function requirement of the pump housing and piston, Z m is the matrix of the mth assembly feature; W m is the displacement twist of the mth assembly feature, and n is the number of assembly features that affect the end-point error.

[0105] Based on the spin model, the position offset Y of the piston based on the transverse centerline is calculated using formula (4):

[0106]

[0107] in, is a matrix The value at position (1,1) of the matrix, the matrix is the relative global coordinate system; W m(X,1) is the element in the Xth row of the small-shift spinor matrix, (X=1,2…6);

[0108] Based on the offset Y, the position offset of the piston is obtained, and according to the offset range of the piston position offset, the speed of the motor or the rotation direction of the motor is determined.

[0109] After long-term use, if there is slight deviation caused by wear, the motor speed can be reduced to extend the service life of the water flosser, reduce the frequency of piston movement caused by excessive speed, and thus reduce the acceleration of deviation caused by the large centrifugal force generated by high movement frequency; effectively inhibit the further deterioration of harmful factors;

[0110] When the offset value is high, an alarm instruction is generated and sent to the user terminal, prompting the user to send the product equipment to the manufacturer for maintenance;

[0111] When the offset reaches a point where it causes a jam, the motor stops working and generates an alarm instruction, which is sent to the user terminal, prompting the user to send the product equipment to the manufacturer for repair.

[0112] When judging the offset Y value, there is an offset error judgment of the first boundary and the second boundary. That is, the offset error of the first boundary and the second boundary determines the error distribution range of the offset. To improve data accuracy, the first boundary and the second boundary are calculated using the following formula using formulas (5) and (6):

[0113]

[0114]

[0115] Among them, Y1 is the first boundary, Y2 is the second boundary, when W m(X,1) Exponent (-1) k 、(-1) j When the value of is greater than 0, W m(X,1) is the first boundary, otherwise it is the second boundary.

[0116] in,

[0117] Based on the limitations of the first and second boundaries, the offset Y can be further optimized, thereby improving the accuracy of adjusting the motor's working state; greatly reducing the situation where the motor's working state is incorrectly controlled due to inaccurate offset calculation, thereby improving user experience and comfort while protecting product safety or life.

[0118] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A water flosser, characterized in that: The invention comprises a bracket, one side of which is connected to the piston pump body, and the other side of which is connected to the control board. A U-shaped housing is provided on the side of the bracket close to the control board, and the U-shaped housing is used to be buckled on the outside of the piston rod, the limit sleeve, and the rotating sleeve, and is used to connect the connecting shaft; the invention also comprises an inner shell, a battery compartment is provided on the side of the inner shell close to the control board, and a battery is provided in the battery compartment, and the battery is electrically connected to the control board and the motor respectively; The inner shell is also used to wrap the motor, and a drainage pipe is provided in the inner shell, one end of the drainage pipe is connected to the nozzle waterproof assembly, and the other end is connected to the water outlet assembly, and the nozzle waterproof assembly is connected to the water outlet nozzle; The piston pump body comprises: a piston, one end of which is sleeved in the pump housing and the other end is connected to a piston rod, the piston rod being driven by a drive assembly and configured to reciprocate in the pump housing; A limit ring is provided on the outer wall of one end of the piston close to the piston rod, and the limit ring is used to seal the piston pump and the piston; One end of the piston rod is provided with a piston ball, and the piston ball is used to cooperate with the piston hole to drive the piston. The other end of the piston rod is connected to a rotating sleeve, and the rotating sleeve is mounted on a limit sleeve. The limit sleeve is arranged on one side of the crown gear. The limit sleeve and the crown gear are both mounted on the connecting shaft. The limit sleeve and the rotating sleeve are coaxially arranged, and the crown gear and the connecting shaft are coaxially arranged; the axis of the limit sleeve and the axis of the crown gear are spaced apart. The crown gear meshes with the copper gear, and the copper gear is connected to the driving end of the motor. A waterproof sleeve is provided at one end of the motor driving end close to the copper gear; The method further includes determining a jam between the pump housing and the piston by a motor control method, and adjusting the speed of the motor or the direction of movement of the motor based on the determination result; The motor control method comprises: Obtain the position parameters of the piston on the pump housing and establish a tolerance model of the piston; A position offset range of the piston is obtained based on the position parameter. If the maximum error range is greater than a first preset value, the motor speed is reduced; if the maximum error range is greater than a second preset value, an alarm instruction is generated and sent to the alarm unit for alarming; The piston position offset range obtained based on the position parameters also includes: The position offset range of the piston is calculated using the screw model combined with the piston cylindricity model. Constructing a three-dimensional model of the pump housing and the piston, and obtaining the screw model based on the three-dimensional model; and calculating the position offset of the piston based on the transverse centerline based on the screw model; Based on the offset, a position offset of the piston is obtained, and according to an offset range of the piston position offset, a rotation speed of the motor or a rotation direction of the motor is determined; When the offset has a high value deviation, an alarm instruction is generated and sent to the user terminal; When the offset reaches a point where it causes a jam, the motor stops working and generates an alarm instruction, which is then sent to the user terminal.

2. A dental flosser according to claim 1, characterized in that: A pump chamber is provided in the pump housing, and an end of the piston away from the piston rod is sleeved in the pump chamber and is used for reciprocating movement in the pump chamber; The lower bottom surface of the pump compartment is provided with a pump casing water outlet, and the pump casing water outlet is used to connect the water outlet component through an adapter; A pump casing water inlet is provided on the lower side wall of the pump casing, and the pump casing water inlet is used to connect the water inlet assembly; a communication port is provided between the pump compartment and the pump casing water outlet, and between the pump compartment and the pump casing water inlet; A piston hole is provided in the piston, and an open end of the piston hole is used for inserting a piston rod, and the piston rod is used to drive the piston.

3. The oral irrigator according to claim 1, characterized in that: The piston is provided with a first slot on the circumferential outer wall at one end close to the pump chamber, and a sealing ring is provided in each of the first slots. The sealing ring is used to seal the gap between the pump housing and the piston; the outer diameter of the piston is d from top to bottom; the end of the piston close to the bottom of the pump chamber is provided with an arc-shaped bottom surface.

4. The oral irrigator according to claim 1, characterized in that: An annular groove is provided at one end of the piston close to the pump chamber, a raised platform is formed at the center of the annular groove, a conical head is provided at the lower end of the piston, the small diameter end of the conical head is connected to the lower end of the piston, and the large diameter end of the conical head is close to the bottom of the pump chamber.

5. The oral irrigator according to claim 1, characterized in that: One end of the water outlet assembly away from the pump housing is connected to a water inlet silicone tube, and the other end of the water inlet silicone tube is provided with a water inlet positioning filter tube; It also includes an outer shell, which is used to be mounted on the outside of the bracket, motor, and piston pump body. A water tank is provided inside the lower end of the outer shell. The water inlet positioning filter pipe is located in the water tank and is used to filter the water in the water tank and drain it into the pump casing.

6. The oral irrigator according to claim 5, characterized in that: The side wall of the water tank is provided with a water injection port, and the water injection port is used to inject water into the water tank; A cover is hinged on the outside of the water inlet, and the cover is hinged on the outside of the water inlet through a torsion spring; A charging port is provided above the water inlet, and the charging port is used to charge the battery. An anti-slip protrusion is provided on the back of the shell near the charging port; A keypad is provided on the front of the housing, and function keys and a switch key are respectively provided on the keypad.

7. The oral irrigator according to claim 5, characterized in that: The control panel is provided with a plurality of pressure sensors, each of which corresponds to a function key and a switch key.

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