A telescopic structure and a waterpik

Abstract

The application relates to the field of oral irrigators, and provides a telescopic structure and an oral irrigator. The telescopic structure comprises a device main body and a water storage tank. A first buckle structure is arranged on the inner side wall of the top of the water storage tank, and a second buckle structure is arranged on the inner side wall of the bottom of the water storage tank. The device main body is movably arranged in the water storage tank. The outer side wall of the device main body is provided with a first sealing element and a third buckle structure. The outer ring of the first sealing element is adapted to be in sealing contact with the inner side wall of the water storage tank at all times. The third buckle structure is adapted to be in hard joint cooperation with the first buckle structure. The first sealing element is adapted to be in soft abutting cooperation with the second buckle structure. When the device main body is pushed into the storage tank, the soft abutting cooperation between the first sealing element and the second buckle structure plays a buffering and damping role through the elasticity and deformation capacity of the first sealing element, so that the pushing process is smooth. When the device main body is pulled out for use, the hard joint cooperation between the third buckle structure and the first buckle structure reliably prevents the device main body from being accidentally completely separated from the water storage tank.

Description

Technical Field

[0001] This utility model relates to the field of oral irrigators, and further to a telescopic structure and an oral irrigator. Background Technology

[0002] With increasing emphasis on oral hygiene, portable water flossers have become increasingly popular due to their portability and ease of use. Currently, most portable water flossers on the market adopt a telescopic or drawer-type structure, with the main body of the device movable inside the water tank to achieve miniaturization.

[0003] The assembly and connection between the main body of the equipment and the water tank mostly rely on a rigid snap-fit ​​structure for connection and fixation, also known as "hard contact." During the pulling and pushing of the main body, direct impact and friction occur between the rigid snaps, resulting in a stiff operating feel, relatively high noise levels, and a lack of premium feel. Moreover, when the equipment is folded up, this simple rigid connection may cause wobbling or abnormal noise due to slight assembly gaps when subjected to vibration or accidental impact. Utility Model Content

[0004] To address the aforementioned technical problems, the purpose of this utility model is to provide a telescopic structure and a water flosser. When the main body of the device is pushed in for storage, the soft contact between the first sealing element and the second snap-fit ​​structure, through the elasticity and deformation capability of the first sealing element itself, effectively buffers and dampens the flow, making the pushing process smooth and quiet, avoiding harsh impacts, and greatly improving the operating feel and product quality. When the main body of the device is pulled out for use, the rigid engagement between the third snap-fit ​​structure and the first snap-fit ​​structure provides a clear and precise sense of positioning, while reliably preventing the main body of the device from accidentally detaching completely from the water tank, thus balancing safety and user experience.

[0005] To achieve the above objectives, this utility model provides a telescopic structure, including a main body of the equipment and a water storage tank;

[0006] The water storage tank has a first buckle structure on the inner side wall of the top and a second buckle structure on the inner side wall of the bottom.

[0007] The main body of the device is movably disposed inside the water storage tank. The outer wall of the main body of the device is provided with a first sealing element and a third buckle structure. The outer ring of the first sealing element is adapted to always be in sealed contact with the inner wall of the water storage tank.

[0008] When the main body of the equipment is in the unfolded state, the third latching structure is adapted to engage with the first latching structure to prevent the main body of the equipment from completely detaching from the water storage tank;

[0009] When the main body of the device is in the storage state, the first sealing element is adapted to seal and engage with the second snap-fit ​​structure to achieve axial fixation of the main body of the device within the water storage tank.

[0010] In some embodiments, the first seal is disposed below the third snap-fit ​​structure, the first snap-fit ​​structure including a first snap-fit ​​groove, and the third snap-fit ​​structure including a third protrusion. When the main body of the device moves relative to the water storage tank, the third protrusion is adapted to slide into or out of the first snap-fit ​​groove to achieve snap-fit ​​or release.

[0011] In some embodiments, the first snap-fit ​​structure further includes a first protrusion and a second protrusion, with the first protrusion and the second protrusion forming the first snap-fit ​​groove. The first protrusion, the second protrusion and the third protrusion are provided with a first arc-shaped transition surface and a second arc-shaped transition surface at both axial ends. The first arc-shaped transition surface and the second arc-shaped transition surface are adapted to guide the third protrusion to slide smoothly into or out of the first snap-fit ​​groove.

[0012] In some embodiments, the radial dimension of the outer sidewall of the device body varies along the axial direction to form a stepped structure, and the third protrusion is disposed in the transition region of the radial dimension variation, wherein the radial dimension of the upper sidewall of the third protrusion is greater than the radial dimension of the lower sidewall of the third protrusion.

[0013] In some embodiments, the outer diameter of the sealing outer edge of the first seal is larger than the maximum outer diameter of the third protrusion, so that the first seal can always be in an interference fit with the inner wall of the water tank during the movement of the main body of the equipment.

[0014] In some embodiments, the second snap-fit ​​structure includes a fourth protrusion, and the fourth protrusion also has a first arc-shaped transition surface and a second arc-shaped transition surface at both axial ends. When the main body of the device is in a retracted state, the sealing outer edge of the first seal is adapted to abut against the second arc-shaped transition surface of the fourth protrusion.

[0015] In some embodiments, the inner sidewall of the bottom of the water tank is also provided with a support portion, and when the first seal is engaged with the bottom of the fourth protrusion, the bottom end face of the main body of the device is adapted to be placed on the support portion.

[0016] In some embodiments, the contours of the fourth protrusion are all asymmetrical structures, with the radius of curvature of the first arc-shaped transition surface on the upper side being greater than the radius of curvature of the second arc-shaped transition surface on the lower side, and the axial length of the first arc-shaped transition surface on the upper side being greater than the axial length of the second arc-shaped transition surface on the lower side.

[0017] In some embodiments, a first mounting groove is provided on the outer wall of the main body of the device, and the first sealing element is integrally formed in the first mounting groove by a secondary injection molding process, so that the first sealing element and the inner wall surface of the first mounting groove are combined into an unremovable whole.

[0018] According to another aspect of this application, a dental flosser is further provided, including any one of the telescopic structures described in the preferred embodiments above.

[0019] Compared with the prior art, the telescopic structure and oral irrigator provided by this utility model have at least one of the following beneficial effects:

[0020] 1. When the main body of the device is pushed in for storage, the soft contact between the first sealing element and the second snap-fit ​​structure, through the elasticity and deformation capability of the first sealing element itself, plays an effective buffering and damping role, making the pushing process smooth and quiet, avoiding harsh impacts, and greatly improving the operating feel and product quality; when the main body of the device is pulled out for use, the rigid engagement between the third snap-fit ​​structure and the first snap-fit ​​structure provides a clear and definite sense of positioning, while reliably preventing the main body of the device from accidentally and completely detaching from the water tank, taking into account both safety and user experience.

[0021] 2. The first and second arc-shaped transition surfaces are suitable for guiding the third protrusion to slide in or out smoothly, reducing frictional resistance and impact, and making the pulling and retraction actions natural and smooth.

[0022] 3. The outer diameter of the sealing outer edge of the first seal is greater than the maximum outer diameter of the third protrusion, ensuring that only the outer edge of the first seal will contact the inner wall of the water storage tank and produce an interference fit during the entire moving stroke of the main body of the equipment.

[0023] 4. The first arc-shaped transition surface above the fourth protrusion is gentler and has a longer axial length. The first seal can slide across the first arc-shaped transition surface with minimal resistance, making operation effortless and smooth. The second arc-shaped transition surface below is steeper and has a shorter axial length. The first seal needs to apply more force to detach from the second arc-shaped transition surface, effectively preventing the main body of the equipment from accidentally detaching due to external force when it is in storage. Attached Figure Description

[0024] The preferred embodiments will be described below in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages and implementation methods of this utility model.

[0025] Figure 1 This is a cross-sectional view of the telescopic structure;

[0026] Figure 2 It is a cross-sectional view of the unfolded state;

[0027] Figure 3It is a cross-sectional view of the stored state;

[0028] Figure 4 This is a structural diagram of the fourth protrusion.

[0029] Explanation of icon numbers:

[0030] Equipment body 1, first seal 112, third snap-fit ​​structure 117, third protrusion 1171,

[0031] Water storage tank 2, first snap-fit ​​structure 21, first protrusion 211, second protrusion 212, first snap-fit ​​groove 213, second snap-fit ​​structure 22, fourth protrusion 221, first arc-shaped transition surface 2211, second arc-shaped transition surface 2212, support part 23. Detailed Implementation

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0033] To keep the drawings concise, each figure only schematically shows the parts relevant to the utility model, and these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0034] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0035] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] Furthermore, in the description of this application, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

[0037] refer to Figures 1 to 3 This utility model provides a telescopic structure, including a device body 1 and a water storage tank 2; the inner side wall of the top of the water storage tank 2 is provided with a first snap-fit ​​structure 21, and the inner side wall of the bottom of the water storage tank 2 is provided with a second snap-fit ​​structure 22; the device body 1 is movably disposed inside the water storage tank 2, and the outer side wall of the device body 1 is provided with a first sealing member 112 and a third snap-fit ​​structure 117, the outer ring of the first sealing member 112 is adapted to always be in sealing contact with the inner side wall of the water storage tank 2; when the device body 1 is in the unfolded state, the third snap-fit ​​structure 117 is adapted to rigidly engage with the first snap-fit ​​structure 21 to prevent the device body 1 from completely detaching from the water storage tank 2; when the device body 1 is in the retracted state, the first sealing member 112 is adapted to softly engage with the second snap-fit ​​structure 22 to achieve axial fixation of the device body 1 inside the water storage tank 2.

[0038] In this embodiment, when the main body 1 of the device is pushed in for storage, the soft contact between the first sealing element 112 and the second snap-fit ​​structure 22 provides effective buffering and damping through the elasticity and deformation capability of the first sealing element 112 itself, making the pushing process smooth and quiet, avoiding harsh impacts, and greatly improving the operating feel and product quality. When the main body 1 of the device is pulled out for use, the rigid engagement between the third snap-fit ​​structure 117 and the first snap-fit ​​structure 21 provides a clear and definite sense of positioning, while reliably preventing the main body 1 of the device from accidentally and completely detaching from the water tank 2, thus taking into account both safety and user experience.

[0039] Specifically, a first snap-fit ​​structure 21 is provided on the inner top wall of the water storage tank 2, and a second snap-fit ​​structure 22 is provided on the inner bottom wall, providing different fixing points for the main body 1 at different travel positions. The first snap-fit ​​structure 21 is mainly responsible for mechanical limiting in the unfolded state; the second snap-fit ​​structure 22 is mainly responsible for sealing and soft fixing in the retracted state.

[0040] The third latching structure 117 is located on the outer wall of the device body 1 and is rigidly connected to the first latching structure 21, achieving a reliable and perceptible hard connection. In the unfolded state, the third latching structure 117 engages with the first latching structure 21. This is a typical mechanical latching structure. Its main function is to provide an absolutely reliable anti-drop safety feature, ensuring that the device body 1 will not completely detach from the water tank 2 when the user is holding it. Furthermore, during the unfolding process, the clear click or tactile feedback provided by the hard latches of the first latching structure 21 and the third latching structure 117 when they are in place gives the user clear operational feedback, assuring them that the device is reliably locked.

[0041] The first sealing element 112 is also disposed on the outer wall of the main body 1. The outer ring of the first sealing element 112 is adapted to always be in sealing contact with the inner wall of the water storage tank 2, continuously preventing water in the water storage tank 2 from leaking through the gaps in the side wall during the entire movement of the main body 1. When the main body 1 is pushed into the bottom of the water storage tank 2 and is in the retracted state, the first sealing element 112 and the second snap-fit ​​structure 22 softly seal against each other. Through the compression deformation of the first sealing element 112, axial fixation is achieved, providing stable radial support for the main body 1 in the water storage tank 2, reducing shaking, and forming an effective seal at the end. When pushed in and retracted, the elastic deformation of the first sealing element 112 engages with the second snap-fit ​​structure 22, playing a buffering and damping role, avoiding the stiffness, impact noise and vibration caused by direct impact of hard plastic snap-fit, making the operation process very smooth and quiet, significantly improving the user experience and the premium feel of the product. Moreover, this application completes the most frequent pushing action with the soft contact of the first sealing element 112, greatly reducing the number and extent of wear on the third snap-fit ​​structure 117. The third snap-fit ​​structure 117 only operates in the most reliable anti-detachment stage, thus effectively avoiding problems such as whitening and fatigue fracture caused by daily wear and tear, and extending the product's service life.

[0042] In summary, this application concentrates the stress and wear in the stored state on the soft contact between the first seal 112 and the second snap-fit ​​structure 22. The wear of the first seal 112 is much less than the direct friction between hard plastics, avoiding micro-friction under daily vibration, thereby significantly reducing the risk of wear, whitening, or breakage of the third snap-fit ​​structure 117, improving the overall product durability, and significantly enhancing structural reliability and service life. Moreover, in the stored state, i.e., when mainly stored and possibly carried, the main body 1 is axially fixed by the soft engagement between the first seal 112 and the second snap-fit ​​structure 22, which can effectively absorb and attenuate vibration energy, preventing the main body 1 from shaking and causing abnormal noises during use and carrying, thus ensuring the integrity and stability of the product during use and carrying.

[0043] More specifically, the first sealing element 112 is disposed below the third snap-fit ​​structure 117. The first snap-fit ​​structure 21 includes a first snap-fit ​​groove 213, and the third snap-fit ​​structure 117 includes a third protrusion 1171. When the device body 1 moves relative to the water storage tank 2, the third protrusion 1171 is adapted to slide into or out of the first snap-fit ​​groove 213 to achieve snap-fit ​​or release. The first sealing element 112 is disposed below the third snap-fit ​​structure 117 to avoid functional interference between the two and ensure that the third snap-fit ​​structure 117 will not rub against or impact the second snap-fit ​​structure 22 when in the storage state. In a modified embodiment, the positions of the first snap-fit ​​groove 213 and the third protrusion 1171 can also be reversed, that is, the third protrusion 1171 is disposed on the inner side wall of the water storage tank 2, and the first snap-fit ​​groove 213 is disposed on the outer side wall of the device body 1. These are all modified embodiments of this application.

[0044] It is worth noting that the core of this application lies in the synergy of hardware and software, and the separation of states. The rigid connection between the third snap-fit ​​structure 117 and the first snap-fit ​​structure 21 only functions at the pull-out end where absolutely reliable mechanical restraint is required, providing a robust anti-fall-off guarantee. Moreover, the flexible connection between the first seal 112 and the second snap-fit ​​structure 22 ensures that, in the most frequent push-in state, the main body 1 of the device is fixed to the bottom of the water tank 2 by the first seal 112, eliminating any potential gaps that could cause shaking or abnormal noise during carrying or movement, making the product more robust and stable.

[0045] Furthermore, the first snap-fit ​​structure 21 also includes a first protrusion 211 and a second protrusion 212, and a first snap-fit ​​groove 213 is formed between the first protrusion 211 and the second protrusion 212. The first protrusion 211, the second protrusion 212 and the third protrusion 1171 are provided with a first arc-shaped transition surface 2211 and a second arc-shaped transition surface 2212 at both axial ends. The first arc-shaped transition surface 2211 and the second arc-shaped transition surface 2212 are adapted to guide the third protrusion 1171 to slide smoothly into or out of the first snap-fit ​​groove 213.

[0046] In this embodiment, the first arc-shaped transition surface 2211 and the second arc-shaped transition surface 2212 are adapted to guide the third protrusion 1171 to slide in or out smoothly, reducing frictional resistance and impact, so that the pulling and retraction actions are natural and smooth.

[0047] Specifically, the axial ends of the first protrusion 211, the second protrusion 212, and the third protrusion 1171 are rounded to form a first arc-shaped transition surface 2211 and a second arc-shaped transition surface 2212. Whether the device body 1 is pushed in for storage or pulled out for use, the first arc-shaped transition surface 2211 and the second arc-shaped transition surface 2212 of the third protrusion 1171 work together with the second arc-shaped transition surface 2212 and the first arc-shaped transition surface 2211 of the first protrusion 211 or the second protrusion 212 to completely transform sharp corner collisions into smooth curved surface transitions. This greatly reduces friction and impact during operation, making the pulling action as smooth as silk, significantly enhancing the product's premium feel and user experience. Furthermore, the smooth transition contact between the first arc-shaped transition surface 2211 and the second arc-shaped transition surface 2212 avoids direct scraping friction, significantly reduces the wear of the first protrusion 211, the second protrusion 212 and the third protrusion 1171, effectively prevents problems such as loosening of the buckle, abnormal noise or even failure caused by wear, thereby extending the life of the entire telescopic structure.

[0048] It is worth noting that the radial dimension of the outer sidewall of the main body 1 changes along the axial direction, forming a stepped structure. The third protrusion 1171 is located in the transition area of ​​the radial dimension change, and the radial dimension of the upper sidewall of the third protrusion 1171 is greater than the radial dimension of the lower sidewall of the third protrusion 1171. In this embodiment, the radial dimension of the upper sidewall of the third protrusion 1171 is greater than the radial dimension of the lower sidewall of the third protrusion 1171, realizing functional partitioning. The small-diameter sidewall below the third protrusion 1171 provides necessary radial space for the first seal 112 and its movement, avoiding interference with the upper structure.

[0049] Furthermore, the outer diameter of the sealing outer edge of the first seal 112 is larger than the maximum outer diameter of the third protrusion 1171, so that the first seal 112 can always be in interference fit with the inner wall of the water storage tank 2 during the movement of the main body 1 of the equipment.

[0050] In this embodiment, the outer diameter of the sealing outer edge of the first seal 112 is greater than the maximum outer diameter of the third protrusion 1171, ensuring that during the entire moving stroke of the device body 1, only the outer edge of the first seal 112 will contact the inner wall of the water storage tank 2 and produce an interference fit.

[0051] Specifically, the outer diameter of the sealing outer edge of the first seal 112 is larger than the maximum outer diameter of the third protrusion 1171, ensuring that only the outer edge of the first seal 112 contacts the inner wall of the water tank 2 and produces an interference fit during the entire movement of the device body 1. The third protrusion 1171 is radially recessed for protection, completely avoiding scratching and friction with the inner wall of the water tank 2. When the device body 1 moves, its radial support and guidance are entirely provided by the elastic first seal 112. This uniform elastic contact provides better damping compared to sliding between hard plastics, making the pulling action smooth, stable, and without shaking, with a high-quality feel. At the same time, since the third protrusion 1171 does not participate in radial friction, the only resistance during pulling comes from the seal, and the force curve is smooth and controllable. Moreover, since the first seal 112 is always in contact with the inner wall of the water tank 2, the water inside the inner wall of the water tank 2 is effectively sealed regardless of the state, completely eliminating the risk of leakage during movement.

[0052] Further, refer to Figure 4 The second snap-fit ​​structure 22 includes a fourth protrusion 221. The fourth protrusion 221 also has a first arc-shaped transition surface 2211 and a second arc-shaped transition surface 2212 at both ends of its axial direction. When the main body 1 of the device is in the storage state, the sealing outer edge of the first sealing member 112 is adapted to abut against the second arc-shaped transition surface 2212 of the fourth protrusion 221.

[0053] Specifically, the sealing outer edge of the first seal 112 is adapted to abut against the second arcuate transition surface 2212 of the fourth protrusion 221. This is no longer a simple planar abutment, but an elastic contact between the curved surface of the fourth protrusion 221 and the first seal 112.

[0054] Preferably, the contours of the fourth protrusion 221 are all asymmetrical structures, the radius of curvature of the first arc transition surface 2211 located on the upper side is greater than the radius of curvature of the second arc transition surface 2212 located on the lower side, and the axial length of the first arc transition surface 2211 located on the upper side is greater than the axial length of the second arc transition surface 2212 located on the lower side.

[0055] In this embodiment, the first arc-shaped transition surface 2211 above the fourth protrusion 221 is gentler and has a longer axial length, allowing the first seal 112 to slide over the first arc-shaped transition surface 2211 with minimal resistance, making operation effortless and smooth. The second arc-shaped transition surface 2212 below is steeper and has a shorter axial length, requiring the first seal 112 to apply greater force to detach from the second arc-shaped transition surface 2212, effectively preventing the main body 1 of the device from accidentally detaching due to external force when in the storage state.

[0056] Specifically, the fourth protrusion 221 adopts an asymmetrical structure, which is manifested in that the first arc-shaped transition surface 2211 on the upper side has a larger radius of curvature and a longer axial length; while the second arc-shaped transition surface 2212 on the lower side has a smaller radius of curvature and a shorter axial length.

[0057] When the device body 1 is pushed in, the first seal 112 first contacts the gentle first arc-shaped transition surface 2211 on the upper side of the fourth protrusion 221. The first arc-shaped transition surface 2211 guides the first seal 112 to gradually compress and deform, rather than suddenly impacting it, achieving a gentle and quiet insertion. The gentle first arc-shaped transition surface 2211 reduces the shear force and instantaneous impact force on the first seal 112, making it more evenly stressed and less worn during repeated compression and deformation.

[0058] When the first seal 112 finally slides past the apex and abuts against the steep second arc transition surface 2212 on the lower side, the first arc transition surface 2211 provides a stable support surface for the rebound force of the first seal 112, thereby realizing the axial soft fixation of the main body 1 in the storage state, which not only avoids shaking, but also facilitates extraction again, and avoids accidental extraction due to external force.

[0059] It is worth noting that the fourth protrusion 221 has an asymmetrical profile, with a gently sloping upper side and a steep, short lower side. The first arc-shaped transition surface 2211 on the upper side of the fourth protrusion 221 has a gentler slope and a longer axial length, so as to facilitate the smooth sliding and engagement of the first seal 112; the arc-shaped transition surface on the lower side has a steeper slope, so as to form an obstacle after engagement and prevent the main body 1 of the device from accidentally coming off. This application achieves easy entry and slightly difficult exit of the first seal 112 through the fourth protrusion 221, which fully meets the user's operational intuition and functional requirements, making it easy to unfold during use and stable during storage. Of course, the first protrusion 211 and the second protrusion 212 can also adopt this asymmetrical structure, which will not be further limited or described in this application.

[0060] Preferably, the bottom inner wall of the water storage tank 2 is also provided with a support part 23. When the first sealing member 112 is engaged with the bottom of the fourth protrusion 221, the bottom end face of the equipment body 1 is suitable for being placed on the support part 23.

[0061] In this embodiment, when the first seal 112 engages with the fourth protrusion 221, the bottom surface of the device body 1 is placed on the support 23, giving the bottom of the device body 1 a direct physical contact surface, thereby greatly enhancing the overall rigidity, stability and quietness in the stored state.

[0062] Specifically, because the first seal 112 and the bottom of the fourth protrusion 221 are fixed in a suspended manner, there is room for movement under the main body of the device 1, which can easily cause slight shaking and noise when subjected to vibration. A support part 23 is specially provided on the inner side wall of the bottom of the water tank 2. When the main body of the device 1 is pushed all the way in, its bottom end can be placed precisely on the support part 23. This means that when the main body of the device 1 is in the stored state, its weight and the axial impact force it may be subjected to no longer rely entirely on the first seal 112 above. Moreover, the upper part is sealed and elastically compressed by the first seal 112, and the lower part is rigidly supported by the support part 23. Furthermore, the weight of the main body of the device 1 and the impact force that may be generated when carrying it are considerable. If the first seal 112 bears all the weight, it will lead to excessive compression, permanent deformation, and accelerated aging of the first seal 112 in the long run, thereby losing its elasticity and sealing performance. The support part 23 bears most of the mechanical load and impact, greatly reducing the burden on the first seal 112 and playing an important protective role, thereby significantly extending the service life and sealing reliability of the entire product.

[0063] Furthermore, a first mounting groove is provided on the outer wall of the main body 1 of the equipment, and the first sealing element 112 is integrally formed in the first mounting groove through a secondary injection molding process, so that the first sealing element 112 and the inner wall surface of the first mounting groove are combined into an unremovable whole.

[0064] In this embodiment, the main body 1 of the device and the first sealing element 112 are integrally formed by a secondary injection molding process, which significantly enhances the overall stability of the first sealing element 112 and effectively prevents the first sealing element 112 from twisting, turning over or breaking during repeated pulling. At the same time, the integral injection molding also ensures the consistency and accuracy of the position of the first sealing element 112, and completely avoids the errors or offsets that may be caused by manual installation.

[0065] Furthermore, a dental flosser is provided, including the telescopic structure of any of the above embodiments.

[0066] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A telescopic structure, characterized in that, Including the main body of the equipment and the water storage tank; The water storage tank has a first buckle structure on the inner side wall of the top and a second buckle structure on the inner side wall of the bottom. The main body of the device is movably disposed inside the water storage tank. The outer wall of the main body of the device is provided with a first sealing element and a third buckle structure. The outer ring of the first sealing element is adapted to always be in sealed contact with the inner wall of the water storage tank. When the main body of the equipment is in the unfolded state, the third latching structure is adapted to be rigidly engaged with the first latching structure to prevent the main body of the equipment from completely detaching from the water storage tank; When the main body of the device is in the storage state, the first sealing element is adapted to softly abut against the second snap-fit ​​structure to achieve axial fixation of the main body of the device within the water storage tank.

2. The telescopic structure according to claim 1, characterized in that, The first sealing element is disposed below the third snap-fit ​​structure. The first snap-fit ​​structure includes a first snap-fit ​​groove, and the third snap-fit ​​structure includes a third protrusion. When the main body of the device moves relative to the water storage tank, the third protrusion is adapted to slide into or out of the first snap-fit ​​groove to achieve snap-fit ​​or release.

3. The telescopic structure according to claim 2, characterized in that, The first snap-fit ​​structure further includes a first protrusion and a second protrusion, and a first snap-fit ​​groove is formed between the first protrusion and the second protrusion. The first arc-shaped transition surface and the second arc-shaped transition surface are provided at both ends of the first protrusion, the second protrusion and the third protrusion. The first arc-shaped transition surface and the second arc-shaped transition surface are adapted to guide the third protrusion to slide smoothly into or out of the first snap-fit ​​groove.

4. A telescopic structure according to claim 3, characterized in that, The radial dimension of the outer sidewall of the main body of the device changes along the axial direction to form a stepped structure. The third protrusion is located in the transition area of ​​the radial dimension change. The radial dimension of the upper sidewall of the third protrusion is greater than the radial dimension of the lower sidewall of the third protrusion.

5. A telescopic structure according to claim 4, characterized in that, The outer diameter of the sealing outer edge of the first seal is larger than the maximum outer diameter of the third protrusion. During the movement of the main body of the equipment, the first seal can always be in an interference fit with the inner wall of the water storage tank.

6. A telescopic structure according to any one of claims 1-5, characterized in that, The second snap-fit ​​structure includes a fourth protrusion, and the fourth protrusion also has a first arc-shaped transition surface and a second arc-shaped transition surface at both axial ends. When the main body of the device is in the storage state, the sealing outer edge of the first seal is adapted to abut against the second arc-shaped transition surface of the fourth protrusion.

7. A telescopic structure according to claim 6, characterized in that, The bottom inner wall of the water storage tank is also provided with a support part. When the first sealing member is engaged with the bottom of the fourth protrusion, the bottom end face of the main body of the equipment is suitable for being placed on the support part.

8. A telescopic structure according to claim 6, characterized in that, The contours of the fourth protrusions are all asymmetrical structures. The radius of curvature of the first arc-shaped transition surface on the upper side is greater than the radius of curvature of the second arc-shaped transition surface on the lower side, and the axial length of the first arc-shaped transition surface on the upper side is greater than the axial length of the second arc-shaped transition surface on the lower side.

9. A telescopic structure according to claim 1, characterized in that, The device body has a first mounting groove on its outer wall. The first sealing element is integrally formed in the first mounting groove through a secondary injection molding process, so that the first sealing element and the inner wall of the first mounting groove are combined into an unremovable whole.

10. A dental flosser, characterized in that, Includes the telescopic structure as described in any one of claims 1-9.

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