Back-type drive device applicable to liquid pump device, liquid discharge system and dental flosser

Abstract

The present invention provides a back-facing drive device, a liquid discharge system, and a water flosser suitable for a liquid pump device, comprising: a mounting structure; a power source, the power source being disposed on the mounting structure; a transmission mechanism, the transmission mechanism comprising a driving cam, a back-facing connecting rod, and a slide, wherein the driving cam is connected to the power source for fixed-axis rotation relative to the mounting structure, the slide is arranged to slide linearly relative to the mounting structure, the slide is used to connect to a working element of the liquid pump device and drive the working element to move synchronously, the back-facing connecting rod has an end close to the working element that is rotatably sleeved on the driving cam, and an end away from the working element that is rotatably connected to the slide, and the back-facing connecting rod drives the slide to reciprocate under the drive cam. The present invention can eliminate lateral forces on the working element of the liquid pump device and further reduce the height of the liquid discharge system, thereby improving the portability and service life of the water flosser.

Description

Technical Field

[0001] The present invention relates to the technical field of oral cleaning, and in particular to a back-facing drive device, a liquid outlet system and a water flosser suitable for a liquid pump device. Background Art

[0002] With improved living standards, people's awareness of oral care has gradually increased, and a wider variety of oral cleaning tools are now available on the market. Among them, oral irrigators, as an alternative to traditional dental floss, have become a must-have small appliance in households. Their basic working principle is that a pump draws water from a tank and sprays it through a nozzle, releasing high-pressure pulses of water hundreds or even thousands of times per minute. This pulses cleans food debris and plaque from between teeth, massages gums, and improves the oral environment.

[0003] At present, many water pumps for water flossers use a cam connecting rod structure. The connecting rod is usually arranged directly forward and connected to the plunger. For example, the existing patent (application number: 202121532881.3) discloses a water flosser movement. Figure 3 The large spur gear is equipped with an eccentric wheel. One end of the connecting rod is connected to the eccentric wheel, and the other end is connected to the piston via a shaft. With this arrangement, the disadvantage of this oral irrigator's liquid outlet system is that the connecting rod must be of a certain length. In other words, the ratio between the eccentric distance of the eccentric wheel and the connecting rod length must be less than a preset reference value to control the lateral force exerted by the connecting rod on the working element. This is not conducive to reducing the volume of the oral irrigator's liquid outlet system, thus hindering the development of oral irrigators towards portability. Summary of the Invention

[0004] In view of the shortcomings of the prior art mentioned above, the technical problem to be solved by the present invention is to provide a back-type driving device, liquid outlet system and water flosser suitable for a liquid pump device, which can eliminate the lateral force on the working elements of the liquid pump device and further reduce the height of the liquid outlet system, thereby improving the portability and service life of the water flosser.

[0005] In order to solve the above technical problems, the present invention provides a back-type driving device suitable for a liquid pump device, comprising:

[0006] Mounting structure;

[0007] a power source, the power source being disposed on the mounting structure;

[0008] The transmission mechanism includes a driving cam, a back-type connecting rod and a slide. The driving cam is connected to the power source to rotate relative to the mounting structure. The slide is arranged to slide linearly relative to the mounting structure. The slide is used to connect the working element of the liquid pump device and drive the working element to move synchronously. The end of the back-type connecting rod close to the working element is rotatably sleeved on the driving cam, and the end of the back-type connecting rod away from the working element is rotatably connected to the slide. The back-type connecting rod drives the slide to reciprocate under the drive of the driving cam.

[0009] Preferably, the back-to-back connecting rod has a socket hole at one end close to the working element; the transmission mechanism also includes a bearing, the bearing includes an inner ring and an outer ring rotatably matched with the inner ring, the inner ring is fixedly sleeved on the driving cam, and the outer ring is fixedly sleeved in the socket hole.

[0010] Preferably, the end of the back-to-back connecting rod away from the working element has a first pin hole, and the side of the slide away from the working element has a second pin hole; the transmission mechanism also includes a driving pin, which is simultaneously inserted into the first pin hole and the second pin hole.

[0011] Preferably, the back-type driving device suitable for the liquid pump device further includes a slide trough body that is slidably matched with the slide seat, and the slide trough body is provided on the mounting structure.

[0012] Preferably, the slide seat is L-shaped, and comprises a sliding plate portion and a connecting plate portion arranged at an angle to the sliding plate portion, wherein the connecting plate portion is used to connect the working element.

[0013] Preferably, the transmission mechanism further comprises a rotating shaft that allows the cam to be driven, and the rotating shaft is arranged on the mounting structure; the sliding seat further comprises an avoidance hole that avoids the rotating shaft.

[0014] Preferably, the transmission mechanism further includes a driving gear and a driven gear meshing with each other, the driving gear is coaxially arranged at the driving end of the power source, the rotation axis of the driven gear is perpendicular to the rotation axis of the driving gear, and the driven gear and the driving cam are coaxially fixedly connected.

[0015] The present invention also provides a liquid outlet system, comprising:

[0016] A liquid pump device, comprising a pump housing, a liquid pump cavity disposed in the pump housing, and a working element disposed in the liquid pump cavity, the working element comprising a piston slidably disposed in the liquid pump cavity and a piston rod liquid-tightly penetrated in the liquid pump cavity and connected to the piston;

[0017] A liquid inlet flow channel, the liquid inlet flow channel is connected to the pump cavity of the liquid pump cavity through a liquid inlet one-way valve;

[0018] A liquid outlet flow channel, the liquid outlet flow channel is connected to the pump cavity of the liquid pump cavity through a liquid outlet one-way valve;

[0019] The back-type driving device suitable for a liquid pump device has the mounting structure formed on the pump housing.

[0020] Preferably, the piston divides the pump chamber of the liquid pump cavity into a rod chamber and a rodless chamber, the liquid outlet one-way valve is arranged inside the piston and only allows the liquid in the rod chamber to flow to the rodless chamber; the liquid inlet channel is connected to the rod chamber through the liquid inlet one-way valve.

[0021] The present invention also provides a dental flosser, comprising:

[0022] The liquid outlet system;

[0023] A nozzle is detachably inserted into the liquid outlet channel;

[0024] The liquid storage tank is connected to the liquid inlet channel.

[0025] As described above, the back-facing drive device, liquid dispensing system, and dental flosser of the present invention, suitable for a liquid pump device, have the following advantageous effects: The primary innovation of the back-facing drive device of the present invention lies in the back-facing arrangement of the back-facing connecting rods: a driving cam is transmission-connected to a power source for fixed-axis rotation relative to a mounting structure, a slide is linearly slidably arranged relative to the mounting structure, the slide is used to connect to the working element of the liquid pump device and drive the working element for synchronous movement, and the slide slides in a direction parallel to the direction of movement of the working element. More importantly, the back-facing connecting rod, with one end proximal to the working element, is rotatably mounted on the driving cam, while the end distal to the working element is rotatably connected to the slide. Driven by the driving cam, the back-facing connecting rod periodically pushes and pulls the slide, thereby driving the slide to reciprocate, thereby achieving reciprocating motion of the working element. Because the slide slides in a direction parallel to the direction of movement of the working element during the process of the slide driving the working element, the slide does not exert lateral force on the working element. Furthermore, since the end of the back-facing connecting rod close to the working element is rotatably sleeved on the driving cam and the end of the back-facing connecting rod away from the working element is rotatably connected to the slide, the back-facing connecting rod does not need to be directly connected to the working element, and the length of the back-facing connecting rod is not limited by the preset ratio between the eccentricity of the driving cam and the length of the back-facing connecting rod, that is, the length of the back-facing connecting rod can be designed to be shorter, thereby enabling the height dimension of the liquid pump device to be smaller.

[0026] Therefore, the back-type driving device applicable to the liquid pump device of the present invention can eliminate the lateral force on the working element and further reduce the height size of the liquid outlet system.

[0027] The oral irrigator of the present invention is more portable and has a longer service life of the liquid pump device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Shown is a front view of the liquid outlet system of the present invention;

[0029] Figure 2 Displayed as Figure 1 Cross-sectional view along line AA;

[0030] Figure 3 Displayed as Figure 2 Cross-sectional view along the midline BB;

[0031] Figure 4 Displayed as Figure 3 Cross-sectional view of the mid-CC line;

[0032] Figure 5 Shown is an internal structural diagram of the liquid outlet system of the present invention;

[0033] Figure 6 A first perspective view showing a working element, a slide, a back-to-back connecting rod, and a bearing;

[0034] Figure 7 A second perspective view of the working element, slide, back-to-back connecting rods, and bearings is shown.

[0035] Component number description

[0036] 1 Liquid pump device

[0037] 11 Liquid pump chamber

[0038] 12 pistons

[0039] 13 piston rod

[0040] 14 Pump casing

[0041] 15 Rodless cavity

[0042] 16 Rod cavity

[0043] 2 Liquid inlet check valve

[0044] 3 Liquid inlet channel

[0045] 4 Liquid outlet check valve

[0046] 5 Liquid outlet channel

[0047] 6 Back-to-back drive

[0048] 61 Power Source

[0049] 62 Transmission Mechanism

[0050] 621 Drive Cam

[0051] 622 Back-to-back connecting rod

[0052] 622a socket hole

[0053] 622b First pin hole

[0054] 623 Slide

[0055] 623a Second pin hole

[0056] 623b Sliding plate

[0057] 623c Snap-on plate

[0058] 623d mount

[0059] 623e Avoidance Hole

[0060] 624 driving gear

[0061] 625 driven gear

[0062] 626 bearings

[0063] 627 drive pin

[0064] 628 Shaft

[0065] 63 chute body

[0066] 7 Nozzles DETAILED DESCRIPTION

[0067] The following describes the implementation of the present invention through specific embodiments. People skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0068] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose of the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0069] like Figure 1 、 Figure 2 as well as Figure 3 As shown, the present invention provides a liquid outlet system, comprising:

[0070] The liquid pump device 1 includes a pump housing 14, a liquid pump cavity 11 disposed in the pump housing 14, and a working element disposed in the liquid pump cavity 11. The working element may be a plunger (an embodiment corresponding to the plunger is not shown). The working element may also include a piston 12 slidably disposed in the liquid pump cavity 11 and a piston rod 13 liquid-tightly penetrated in the liquid pump cavity 11 and connected to the piston 12.

[0071] The liquid inlet flow channel 3 is connected to the pump cavity of the liquid pump cavity 11 through the liquid inlet one-way valve 2;

[0072] The liquid outlet flow channel 5 is connected to the pump cavity of the liquid pump cavity 11 through the liquid outlet one-way valve 4;

[0073] In particular, it also includes a back-type driving device 6 suitable for the above-mentioned liquid pump device, which is used to drive the working element to perform linear reciprocating motion, thereby realizing the suction stroke and discharge stroke of the liquid pump device 1.

[0074] In the liquid discharge system of the present invention, liquid in inlet channel 3 periodically flows into the pump chamber through inlet check valve 2, based on changes in the hydraulic pressure within the pump chamber. Liquid in the pump chamber periodically flows into outlet channel 5 through outlet check valve 4. The innovation of the liquid discharge system of the present invention lies in the fact that the back-directed drive device applicable to the liquid pump device not only eliminates lateral forces on the working element (there is an angle between the direction of application of the lateral force and the direction of movement of the working element), but also further reduces the height of the liquid discharge system.

[0075] In order to improve the structural compactness of the above-mentioned liquid outlet system, as a liquid suction and discharge principle of the liquid outlet system: the above-mentioned piston 12 divides the pump chamber of the liquid pump chamber 11 into a rod chamber 16 and a rodless chamber 15, and the above-mentioned liquid outlet one-way valve 4 is arranged inside the piston 12 and only allows the liquid in the rod chamber 16 to flow to the rodless chamber 15; the above-mentioned liquid inlet channel 3 is connected to the rod chamber 16 through the liquid inlet one-way valve 2.

[0076] When the piston 12 is pulled back by the piston rod 13 to perform a suction stroke, the internal pressure of the rod chamber 16 increases and the internal pressure of the rodless chamber 15 decreases, the liquid inlet one-way valve 2 switches to a closed state, and the liquid outlet one-way valve 4 switches to an open state. The liquid in the rod chamber 16 can overcome the closing pre-tightening force of the liquid outlet one-way valve 4 and flow into the rodless chamber 15.

[0077] When the piston 12 is pushed out by the piston rod 13 to perform a discharge stroke, the internal pressure of the rod chamber 16 decreases and the internal pressure of the rodless chamber 15 increases, the liquid inlet one-way valve 2 switches to the open state, and the liquid in the liquid inlet channel 3 can overcome the closing pre-tightening force of the liquid inlet one-way valve 2 and flow into the rod chamber 16; at the same time, the liquid outlet one-way valve 4 switches to the closed state, and the liquid in the rodless chamber 15 is squeezed into the liquid outlet channel 5 by the piston 12.

[0078] Now, how the back-type driving device 6 applicable to the liquid pump device 1 eliminates the lateral force on the working element and how to reduce the height size of the liquid outlet system is explained as follows: Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 as well as Figure 7 As shown, the above-mentioned back-type driving device 6 suitable for the liquid pump device includes:

[0079] Mounting structure;

[0080] A power source 61 is provided on the mounting structure;

[0081] The transmission mechanism 62 includes a driving cam 621, a back-type connecting rod 622 and a slide 623. The driving cam 621 is connected to the power source 61 for fixed-axis rotation relative to the mounting structure. The slide 623 is arranged to slide linearly relative to the mounting structure. The slide 623 is used to connect the working element of the liquid pump device 1 and drive the working element to move synchronously. The end of the back-type connecting rod 622 close to the working element is rotatably sleeved on the driving cam 621, and the end of the back-type connecting rod 622 away from the working element is rotatably connected to the slide 623. The back-type connecting rod 622 drives the above-mentioned slide 623 to reciprocate under the drive of the driving cam 621.

[0082] In the present invention, the mounting structure can be a separate component or a partial structure of the pump housing 14. The power source 61 is provided on the mounting structure. For example, the power source 61 can be a motor. Compared with the existing cam-connecting rod structure in which the connecting rod is directly hinged to the plunger, the main innovation of the back-type drive device 6 of the present invention lies in the back-to-back arrangement of the back-type connecting rod 622: the driving cam 621 is transmission-connected to the power source 61 to rotate relative to the mounting structure, and the slide 623 is arranged to slide linearly relative to the mounting structure. The slide 623 is used to connect the working element of the liquid pump device 1 and drive the working element to move synchronously. At the same time, the sliding direction of the slide 623 is parallel to the movement direction of the working element. More importantly, the end of the rear-facing connecting rod 622 closest to the working element is rotatably mounted on the drive cam 621, while the end of the rear-facing connecting rod 622, further away from the working element, is rotatably connected to the slide 623. Driven by the drive cam 621, the rear-facing connecting rod 622 periodically pushes and pulls the slide 623, thereby driving the slide 623 to reciprocate, thereby achieving reciprocating motion of the working element. Because the sliding direction of the slide 623 is always parallel to the direction of motion of the working element during the process of the slide 623 driving the working element, the slide 623 does not exert lateral force on the working element. Furthermore, since the end of the back-facing connecting rod 622 close to the working element is rotatably sleeved on the driving cam 621 and the end of the back-facing connecting rod 622 away from the working element is rotatably connected to the slide 623, the back-facing connecting rod 622 does not need to be directly connected to the working element, and the length of the back-facing connecting rod 622 is not limited by the preset ratio between the eccentricity of the driving cam 621 and the length of the back-facing connecting rod 622, that is, the length of the back-facing connecting rod 622 can be designed to be shorter, and the distance between the working element and the driving cam 621 can be designed to be smaller, so that the height dimension of the liquid pump device can be smaller.

[0083] Therefore, the back-type driving device applicable to the liquid pump device of the present invention can eliminate the lateral force on the working element and further reduce the height size of the liquid outlet system.

[0084] like Figure 5 and Figure 6 As shown, to reduce wear between the back-to-back connecting rod 622 and the driving cam 621, thereby increasing service life, the back-to-back connecting rod 622 has a socket hole 622a at one end near the working element. The transmission mechanism 62 also includes a bearing 626, which includes an inner ring and an outer ring that rotatably engages with the inner ring. The inner ring is fixedly mounted on the driving cam 621, and the outer ring is fixedly mounted in the socket hole 622a. Furthermore, the bearing 626 can be a sealed, pre-lubricated deep groove ball bearing.

[0085] like Figure 3 、 Figure 6 as well as Figure 7As shown, in order to realize the hinge between the above-mentioned back-to-back connecting rod 622 and the slide 623, that is, to realize the reciprocating swing of the above-mentioned back-to-back connecting rod 622 relative to the slide 623, the above-mentioned back-to-back connecting rod 622 has a first pin hole 622b on the end away from the working element, and the above-mentioned slide 623 has a second pin hole 623a on the side away from the working element; the above-mentioned transmission mechanism 62 also includes a driving pin 627, and the driving pin 627 is simultaneously inserted into the first pin hole 622b and the second pin hole 623a.

[0086] like Figure 5 As shown, in order to achieve linear sliding of the slide 623, the back-type driving device for the liquid pump device further includes a slide chute 63 that is slidably matched with the slide 623. The slide chute 63 is provided on the mounting structure. Further, the slide chute 63 is concave.

[0087] like Figure 6 and Figure 7 As shown, to simplify the structure of the slide 623, the slide 623 includes a sliding plate portion 623b and a connecting plate portion 623c disposed at an angle to the sliding plate portion 623b. The connecting plate portion 623c is used to connect to the working element. To facilitate assembly and disassembly of the slide 623 and the working element, the slide 623 is L-shaped and includes a sliding plate portion 623b and a connecting plate portion 623c disposed perpendicularly to the sliding plate portion 623b. The connecting plate portion 623c is provided with a latch 623d for retaining the working element.

[0088] like Figure 5 and Figure 7 As shown, in order to realize the rotation of the driving cam 621 , the transmission mechanism 62 further includes a rotating shaft 628 that allows the driving cam 621 to be sleeved, and the rotating shaft 628 is provided on the mounting structure; the sliding seat 623 also has an avoidance hole 623e that avoids the rotating shaft 628 .

[0089] In order to make the structure of the transmission mechanism 62 more compact, the above-mentioned transmission mechanism 62 also includes a driving gear 624 and a driven gear 625 that mesh with each other. The driving gear 624 is coaxially arranged at the driving end of the power source 61, and the rotation axis of the driven gear 625 is perpendicular to the rotation axis of the driving gear 624. The driven gear 625 and the driving cam 621 are coaxially fixedly connected.

[0090] The present invention also provides a dental flosser, comprising:

[0091] The above-mentioned liquid outlet system;

[0092] The nozzle 7 is detachably inserted into the liquid outlet channel 5;

[0093] The liquid storage tank is connected to the liquid inlet channel 3.

[0094] The oral irrigator of the present invention is more portable and has a longer service life of the liquid pump device 1 .

[0095] In summary, the present invention eliminates lateral forces on the working element of the liquid pump device and further reduces the height and dimensions of the liquid outlet system, thereby improving the portability and service life of the oral irrigator. Therefore, the present invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0096] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A back-type driving device suitable for a liquid pump device, characterized in that: include: Mounting structure; A power source (61), the power source (61) is provided on the mounting structure; The transmission mechanism (62) includes a driving cam (621), a back-type connecting rod (622), and a slide (623). The driving cam (621) is connected to the power source (61) for fixed-axis rotation relative to the mounting structure. The slide (623) is arranged to slide linearly relative to the mounting structure. The slide (623) is used to connect to the working element of the liquid pump device (1) and drive the working element to move synchronously. The end of the back-facing connecting rod (622) away from the working element has a first pin hole (622b), and the side of the slide (623) away from the working element has a second pin hole (623a); the transmission mechanism (62) further includes a driving pin (627), and the driving pin (627) is simultaneously inserted into the first pin hole (622b) and the second pin hole (623a); the end of the back-facing connecting rod (622) close to the working element is rotatably sleeved on the driving cam (621), and the end of the back-facing connecting rod (622) away from the working element is rotatably connected to the slide (623), and the back-facing connecting rod (622) drives the slide (623) to reciprocate under the drive of the driving cam (621).

2. The back-type driving device for a liquid pump device according to claim 1, characterized in that: The back-to-back connecting rod (622) has a sleeve hole (622a) at one end close to the working element; the transmission mechanism (62) further includes a bearing (626), the bearing (626) includes an inner ring and an outer ring rotatably matched with the inner ring, the inner ring is fixedly sleeved on the driving cam (621), and the outer ring is fixedly sleeved in the sleeve hole (622a).

3. The back-to-back drive device for a liquid pump device according to claim 1, characterized in that: The back-type driving device suitable for the liquid pump device further comprises a slide trough body (63) that is slidably matched with the slide seat (623), and the slide trough body (63) is arranged on the mounting structure.

4. The back-to-back drive device for a liquid pump device according to claim 1, characterized in that: The sliding seat (623) includes a sliding plate portion (623b) and a connecting plate portion (623c) arranged at an angle to the sliding plate portion (623b), and the connecting plate portion (623c) is used to connect the working element.

5. The back-to-back drive device for a liquid pump device according to claim 1, characterized in that: The transmission mechanism (62) further comprises a rotating shaft (628) that allows the driving cam (621) to be sleeved, and the rotating shaft (628) is arranged on the mounting structure; the sliding seat (623) further comprises an avoidance hole (623e) that avoids the rotating shaft (628).

6. The back-to-back drive device for a liquid pump device according to claim 1, characterized in that: The transmission mechanism (62) further comprises a driving gear (624) and a driven gear (625) meshing with each other. The driving gear (624) is coaxially arranged at the driving end of the power source (61). The rotation axis of the driven gear (625) is perpendicular to the rotation axis of the driving gear (624). The driven gear (625) and the driving cam (621) are coaxially fixedly connected.

7. A liquid outlet system, characterized in that: include: A liquid pump device (1) includes a pump housing (14), a liquid pump cavity (11) disposed in the pump housing (14), and a working element disposed in the liquid pump cavity (11), wherein the working element includes a piston (12) slidably disposed in the liquid pump cavity (11) and a piston rod (13) liquid-tightly penetrating the liquid pump cavity (11) and connected to the piston (12); A liquid inlet channel (3), the liquid inlet channel (3) being connected to the pump chamber of the liquid pump chamber (11) through the liquid inlet one-way valve (2); A liquid outlet channel (5), the liquid outlet channel (5) is connected to the pump cavity of the liquid pump cavity (11) through the liquid outlet one-way valve (4); According to any one of claims 1 to 6 of the back-to-back drive device suitable for a liquid pump device, the mounting structure is formed on the pump housing (14).

8. The liquid outlet system according to claim 7, characterized in that: The piston (12) divides the pump chamber of the liquid pump cavity (11) into a rod chamber (16) and a rodless chamber (15); the liquid outlet one-way valve (4) is arranged inside the piston (12) and only allows the liquid in the rod chamber (16) to flow into the rodless chamber (15); the liquid inlet channel (3) is connected to the rod chamber (16) through the liquid inlet one-way valve (2).

9. A water flosser, characterized in that: include: The liquid outlet system according to claim 7 or claim 8; A nozzle (7), the nozzle (7) is detachably inserted into the liquid outlet channel (5); A liquid storage tank is connected to the liquid inlet channel (3).

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