Filter assembly and treatment handle

Abstract

The utility model discloses a filter assembly and treatment handle relates to intense pulsed light treatment equipment technical field, the filter assembly that the utility model puts forward includes casing, filter and dust cover, and the casing is used for partial insertion treatment handle, and the cavity of accommodating is formed in the casing, and the opposite both sides outer wall of casing is equipped with first window and second window respectively, and first window and second window are opposite and set, filter is located in the casing and is between first window and second window, dust cover is slidably arranged in casing and can be close to or away from filter sliding, to cover filter or make filter show in first window and second window. The utility model discloses through the dust cover of sliding setting on the casing of filter assembly, when daily storage or moving, dust cover covers filter to realize dust prevention, only when needing to insert filter assembly handle shell, pushes away dust cover, makes filter show, has reduced the risk that filter is contaminated by dust.

Description

Technical Field

[0001] This utility model relates to the technical field of intense pulsed light therapy equipment, and in particular to a filter assembly and a treatment handpiece. Background Technology

[0002] For intense pulsed light (IPL) therapy equipment, multiple wavelength filters are typically used to treat different indications. Different filters are selected for different treatments. These filters have different coatings on their surfaces, and the quality of these coatings greatly affects the treatment outcome. If the filter is contaminated, such as with dust on its surface, the coating will be quickly damaged during the treatment, thus affecting the therapeutic effect. Therefore, protecting the filters is extremely important.

[0003] Existing devices typically store the filter in a storage box to prevent dust accumulation or accidental contact. When changing the filter, the original filter is removed from the handle and placed in the box, then the new filter is taken out and installed in the treatment handle. During this process, the filter is actually exposed to the air, and dust easily settles on its surface. Furthermore, the part of the treatment handle where the filter is installed is not dustproof, and dust can still get inside the handle. Therefore, even with the filter installed on the handle, dust can still accumulate. Utility Model Content

[0004] The main purpose of this invention is to provide a filter assembly and treatment handle, which aims to reduce the risk of dust contamination of the filter.

[0005] To achieve the above objectives, the filter assembly proposed in this utility model includes a housing, a filter, and a dust cover. The housing is used to partially insert into the treatment handle, and a receiving cavity is formed inside the housing. A first window and a second window are respectively opened on opposite outer walls of the housing, and the first window and the second window are arranged opposite to each other. The filter is disposed inside the housing and located between the first window and the second window. The dust cover is slidably disposed on the housing and can slide close to or away from the filter to cover the filter or expose the filter in the first window and the second window.

[0006] In one embodiment, the filter assembly further includes a mounting bracket located within the receiving cavity and connected to the housing; a mounting groove is formed on the mounting bracket, through which the filter is fixedly disposed; and a dust cover is slidably fitted onto the mounting bracket to slide closer to or further away from the mounting groove.

[0007] In one embodiment, the fixing frame is provided with a first guide portion, and the dust cover is provided with a second guide portion. The first guide portion and the second guide portion are slidably connected. Of the first guide portion and the second guide portion, one is a guide protrusion and the other is a guide groove.

[0008] In one embodiment, the dust cover is fitted with at least two first sealing members, which are respectively located on both sides of the filter. When the dust cover covers the filter, the first sealing members seal the periphery of the first window with the dust cover, and the first sealing members seal the periphery of the second window with the dust cover.

[0009] In one embodiment, the filter assembly further includes an elastic element, the two ends of which are respectively connected to the fixing frame and the dust cover, and push the dust cover closer to the filter.

[0010] In one embodiment, the mounting bracket has a mounting groove that extends along the sliding direction of the dust cover, and the elastic element is at least partially accommodated within the mounting groove.

[0011] In one embodiment, a clearance slit is formed on the housing, and the dust cover is partially exposed within the clearance slit.

[0012] In one embodiment, a stop boss is formed at one end of the housing away from the first window and the second window.

[0013] In one embodiment, the housing includes an upper shell and a lower shell, which are detachably connected and enclose the receiving cavity.

[0014] This utility model also proposes a treatment handle, which includes a handle housing and a filter assembly as described in any of the above embodiments. The handle housing has a lens mounting opening that communicates with the inner cavity of the handle housing. The inner cavity of the handle housing is provided with a pusher that is disposed opposite to the lens mounting opening. When the housing is inserted into the inner cavity of the handle housing through the lens mounting opening, the pusher abuts against the dust cover to move the dust cover away from the filter.

[0015] In one embodiment, the inner cavity of the handle housing is provided with a dustproof door, which is hinged to the handle housing and separates the mirror mounting opening from the inner cavity of the handle housing.

[0016] The filter assembly proposed in this utility model includes a housing, a filter, and a dust cover. The housing is partially inserted into the treatment handle and has a receiving cavity. A first window and a second window are respectively opened on opposite outer walls of the housing, with the first and second windows facing each other. The filter is disposed within the housing and located between the first and second windows. The dust cover is slidably disposed on the housing and can slide closer to or further away from the filter to cover it or expose it through the first and second windows. This utility model, by sliding the dust cover on the housing of the filter assembly, achieves dust protection by covering the filter during daily storage or movement. Only when the filter assembly needs to be inserted into the handle housing is the dust cover pushed open to expose the filter, reducing the risk of dust contamination of the filter. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of an embodiment of the treatment handle provided by this utility model; Figure 2 for Figure 1 Schematic diagram of the structure of the intermediate filter assembly; Figure 3 for Figure 2 Exploded view of the middle filter assembly in one state; Figure 4 for Figure 2 Exploded view of the middle filter assembly in another state; Figure 5 for Figure 2 Cross-sectional view of the middle filter assembly in one state; Figure 6 for Figure 2 Cross-sectional view of the middle filter assembly in another state; Figure 7 for Figure 2 Enlarged view of point A in the middle; Figure 8 for Figure 1 A schematic diagram of the structure of the treatment handle in one state; Figure 9 for Figure 1 A schematic diagram of the structure of the treatment handle in another state; Figure 10 for Figure 1 A schematic diagram of the structure of the treatment handle in another state; Figure 11 for Figure 8 Exploded view of the structure of the treatment handle.

[0019] Explanation of icon numbers: 1000, Treatment Handle; 100. Filter assembly; 1. Shell; 1a. Receiving cavity; 1b. Clearance slot; 11. Upper shell; 11a. First window; 12. Lower shell; 12a. Second window; 13. Stop boss; 2. Filter; 3. Dust cover; 31. Guide protrusion; 32. First seal; 4. Fixing bracket; 4a. Fixing groove; 4b. Guide groove; 4c. Mounting groove; 5. Elastic components; 200, Handle housing; 200a, Lens mounting opening; 210, Push-up component; 220, Dustproof door; 221, Hinge shaft; 222, Torsion spring; 230, Second seal; 240, Xenon lamp; 250, Light guide.

[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0022] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0023] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0024] This utility model proposes a filter assembly 100.

[0025] Please see Figures 2 to 4 In one embodiment of the present invention, the filter assembly 100 includes a housing 1, a filter 2, and a dust cover 3. The housing 1 is used to partially insert into the treatment handle 1000. A receiving cavity 1a is formed inside the housing 1. A first window 11a and a second window 12a are respectively opened on opposite outer walls of the housing 1. The first window 11a and the second window 12a are arranged opposite to each other. The filter 2 is disposed inside the housing 1 and located between the first window 11a and the second window 12a. The dust cover 3 is slidably disposed on the housing 1 and can slide close to or away from the filter 2 to cover the filter 2 or expose the filter 2 in the first window 11a and the second window 12a.

[0026] In this embodiment, a pluggable housing 1 is used as a carrier to fix the filter 2 inside the housing 1, and a sliding dust cover 3 is provided outside or inside the housing 1. By pushing the dust cover 3, the filter 2 can switch between the two states of being shielded and exposed, thereby isolating dust during non-treatment periods and allowing the light beam to pass through smoothly during treatment periods.

[0027] Specifically, the housing 1 is flat and box-shaped, its shape matching the slot at the front end of the treatment handle 1000, forming an internal receiving cavity 1a. A window is opened on each of the opposite side walls of the receiving cavity 1a, the two windows being coaxial and aligned to form a channel for the light beam to enter and exit the housing 1. A filter 2 is placed inside the receiving cavity 1a, positioned between the two windows, as shown below. Figure 2 The coated surface of the filter 2 faces the upper first window 11a, and the substrate surface faces the lower second window 12a. After the filter 2 is installed, its effective light-transmitting area always remains coaxial with the two windows to ensure that the light beam passes through without obstruction.

[0028] The dust cover 3 is fitted over the outside of the housing 1 or located inside the housing 1, and can slide along the direction in which the housing 1 is inserted into the handle housing 200. When the dust cover 3 covers and blocks the filter 2, it isolates the filter 2 from the external environment, preventing dust from contaminating the filter 2. When the dust cover 3 is pushed away from the filter 2, the filter 2 is fully exposed and visible through the two windows, allowing the light beam to pass sequentially through the first window 11a, the filter 2, and the second window 12a to complete the treatment. After the treatment, the dust cover 3 is pushed back in the opposite direction, and it covers and blocks the filter 2 again, isolating the filter 2 from the external environment.

[0029] In summary, the filter assembly 100 of this embodiment can keep the filter 2 in a shielded state during storage, transportation, and non-treatment periods after it is installed in the handle, greatly reducing the contact time with the outside air and significantly reducing the probability of dust accumulation. During treatment, it can be switched to the exposed state with just a single push-pull action, which is simple to operate. Moreover, the filter 2 itself does not need to be removed from the housing 1, avoiding the risk of repeated exposure caused by traditional replacement methods, thereby extending the coating life and ensuring stable output of treatment energy.

[0030] Further, please refer to Figures 3 to 6 In one embodiment of the present invention, the filter assembly 100 further includes a fixing frame 4, which is located in the receiving cavity 1a and connected to the housing 1; a fixing groove 4a is formed on the fixing frame 4, through which the filter 2 is fixedly disposed; and a dust cover 3 is slidably sleeved on the fixing frame 4 to slide close to or away from the fixing groove 4a.

[0031] In this embodiment, in order to further improve the positioning accuracy and dustproof reliability of the filter 2, a fixing frame 4 is added on the basis of the previous embodiment to fix the filter 2 and provide a sliding base for the dust cover 3.

[0032] Specifically, the fixing frame 4 is a rectangular plate structure made of the same material as the housing 1. It is connected to the housing 1 via a pre-set groove on the inner wall of the housing 1 through a snap fastener, achieving detachable fixing. Alternatively, at least two openings perpendicular to the surface of the fixing frame 4 can be provided on the fixing frame 4, and at least two pivots can be correspondingly provided in the receiving groove. The fixing frame 4 can be fixed by inserting the pivots into the openings, or the fixing frame 4 can be directly connected to the housing 1 with screws. One end of the fixing frame 4 extends through a fixing groove 4a perpendicular to the surface of the fixing frame 4. The shape of the fixing groove 4a matches the outer contour of the filter 2, and the filter 2 is parallel to the surface of the fixing frame 4 and snaps into the fixing groove 4a. A gap is left between the outer wall of the fixing frame 4 and the inner wall of the housing 1, which constitutes the sliding space for the dust cover 3. The dust cover 3 is fitted over the outside of the fixing frame 4 and can slide along the fixing frame 4 to move closer to or away from the filter 2. The light beam can pass through the first window 11a, the fixing groove 4a, the filter 2, and the second window 12a in sequence to complete the treatment. In this embodiment, the sliding reference of the dust cover 3 is the fixed frame 4, which makes the relative position accuracy between the dust cover 3 and the filter 2 higher. At the same time, the fixed frame 4 can be removed from the housing 1 together with the filter 2. During maintenance, the filter 2 can be replaced as a whole by simply pulling out the fixed frame 4, without touching the coating surface, thus reducing the risk of secondary pollution.

[0033] Further, please refer to Figure 3 and Figure 4 In one embodiment of the present invention, the fixing frame 4 is provided with a first guide part, and the dust cover 3 is provided with a second guide part. The first guide part and the second guide part are slidably connected. One of the first guide part and the second guide part is a guide protrusion 31, and the other is a guide groove 4b.

[0034] In this embodiment, a pair of guide protrusions 31 and guide grooves 4b are added between the fixing frame 4 and the dust cover 3 to make the sliding direction of the dust cover 3 unique and stable. Exemplarily, two rectangular cross-section guide protrusions 31 are integrally extended from the two outer sidewalls of the fixing frame 4 along the insertion / removal direction, with the protrusion surfaces parallel to the end faces of the fixing frame 4; guide grooves 4b are formed at corresponding positions on the inner sidewall of the dust cover 3, the grooves extending through the entire length of the cover, and the groove width slightly larger than the protrusion width, forming a sliding pair with very small gaps. Exemplarily, two rectangular cross-section guide grooves 4b are integrally extended from the two outer sidewalls of the fixing frame 4 along the insertion / removal direction; guide protrusions 31 are formed at corresponding positions on the inner sidewall of the dust cover 3, the guide protrusions 31 extending through the entire length of the dust cover 3, and the groove width slightly larger than the protrusion width, forming a sliding pair with very small gaps.

[0035] During assembly, the guide protrusion 31 is embedded in the guide groove 4b, and the dust cover 3 can only slide back and forth along the axis of the protrusion. Rotational or lateral freedom is eliminated, ensuring that the cover does not tilt during opening and closing. When the dust cover 3 moves backward to open, the moving pair remains engaged, preventing the cover from shaking or coming off, allowing the operator to push and pull with just one hand. Through the sliding engagement of the guide protrusion 31 and the guide groove 4b, the movement accuracy of the dust cover 3 is improved, sealing reliability is enhanced, and the risk of dust contamination of the filter 2 coating is further reduced. Simultaneously, the guide pair structure is simple, being injection molded along with the fixing frame 4 and the dust cover 3, without adding extra parts, resulting in low cost.

[0036] Further, please refer to Figure 5 and Figure 6 In one embodiment of the present invention, at least two first sealing members 32 are provided on the dust cover 3. The two first sealing members 32 are respectively located on both sides of the filter 2. When the dust cover 3 covers the filter 2, the first sealing members 32 seal the periphery of the first window 11a and the dust cover 3, and the first sealing members 32 seal the periphery of the second window 12a and the dust cover 3.

[0037] In this embodiment, a first sealing member 32 is fitted on the dust cover 3 to seal the periphery of the fixing groove 4a and the dust cover 3 when the dust cover 3 covers the filter 2, thereby further preventing dust from entering the interior of the fixing groove 4a and reducing the risk of contamination of the surface of the filter 2.

[0038] The first sealing element 32 is made of an elastic material, such as silicone or thermoplastic elastomer, with good compressibility and resilience. Its structure can be a continuous annular sealing ring. The first sealing element 32 can be fixed to the inner surface of the dust cover 3 by bonding, snap-fitting, or secondary injection molding, ensuring that it will not fall off or shift during use. Two first sealing elements 32 are located on opposite sides of the filter 2. When the dust cover 3 slides to cover the filter 2, one side of each of the two first sealing elements 32 contacts and is compressed against the periphery of the first window 11a, forming a continuous sealing interface. The other side of each of the two first sealing elements 32 contacts and is compressed against the periphery of the second window 12a, forming another continuous sealing interface. In this way, the two sealing interfaces fill the tiny gap between the dust cover 3 and the fixing groove 4a, preventing dust, moisture, or other contaminants in the external air from entering the fixing groove 4a, thereby keeping the surface of the filter 2 clean.

[0039] Further, please refer to Figure 3 , Figure 4 and Figure 6 In one embodiment of the present invention, the filter assembly 100 further includes an elastic element 5, which connects the fixing frame 4 and the dust cover 3 and pushes the dust cover 3 closer to the filter 2.

[0040] In this embodiment, an elastic element 5 is added between the fixing frame 4 and the dust cover 3. The elastic element 5 continuously applies a pushing force that causes the dust cover 3 to move toward the filter 2, thereby automatically maintaining the covered state when there is no external force operation, further reducing the risk of the filter 2 being accidentally exposed.

[0041] The elastic element 5 can be a stainless steel leaf spring, or a bent rib made of silicone strip or thermoplastic elastomer. For example, the elastic element 5 is a bent rib made of thermoplastic elastomer, with hooks formed at both ends. A first hanging hole is provided on the outer wall of the fixing frame 4, and a corresponding second hanging hole is provided on the outer wall of the dust cover 3; the hooks at both ends of the leaf spring hook into the two hanging holes respectively, forming a pre-stretched state. After assembly, the restoring force of the bent rib always pulls the dust cover 3 towards the fixing groove 4a. For example, the elastic element 5 is a spring or leaf spring, with a groove formed on the fixing frame 4 to accommodate the elastic element 5. One end of the spring or leaf spring abuts against the groove, and the other end abuts against the dust cover 3. The spring or leaf spring is in a pre-compressed state, and the restoring force of the spring or leaf spring always pushes the dust cover 3 towards the fixing groove 4a. In its natural state, the dust cover 3 is tightly pressed against the end face of the fixing groove 4a by the elastic element 5, and the first sealing element 32 is uniformly compressed to form a continuous and reliable seal. When treatment is required, the operator only needs to push the dust cover 3 backward, and the elastic element 5 is further compressed or stretched, so that the dust cover 3 moves away from the filter 2 to expose the filter 2. When the external force is removed, the dust cover 3 automatically returns to its original position under the action of the elastic element 5, and re-covers the filter 2. This structure eliminates the step of manual reset, avoids dust intrusion caused by the user forgetting to close it, and the elastic element 5 is small in size and hidden between the cover and the fixing frame 4, without increasing the overall size of the component or interfering with the optical path. Through the continuous force of the elastic element 5, the filter 2 is always in a closed and protected state when not in use, further reducing the probability of dust deposition on the coating surface and significantly improving the dust protection safety of the component.

[0042] Further, please refer to Figure 3 , Figure 4 and Figure 6 In one embodiment of the present invention, a mounting groove 4c is formed on the fixing frame 4, the mounting groove 4c extends along the sliding direction of the dust cover 3, and the elastic member 5 is at least partially accommodated in the mounting groove 4c.

[0043] In this embodiment, one or more mounting grooves 4c are provided on the outer side wall of the fixing frame 4 along the sliding direction of the dust cover 3. When more than one mounting groove 4c is provided, the mounting grooves 4c are arranged parallel to each other. The side wall of the mounting groove 4c can provide a certain limit and guide for the elastic element 5. Taking the compression spring as an example, the diameter of the compression spring is slightly larger than the groove depth so that the compression spring can partially protrude from the mounting groove 4c and abut against the dust cover 3 sleeved on the fixing frame 4. Optionally, the diameter of the compression spring can be smaller than the groove depth so that the compression spring is completely accommodated in the mounting groove 4c. In this case, a protruding structure needs to extend from the dust cover 3 into the mounting groove to connect with the compression spring. The same applies to elastic elements such as tension springs and leaf springs, which will not be described in detail here. When the dust cover 3 is pushed away from the filter 2, the compression spring is smoothly compressed along the axis of the mounting groove 4c, guided by the groove wall of the mounting groove 4c throughout the process, and its radial deformation and movement are limited to prevent the compression spring from twisting or slipping. After the force that pushed the dust cover 3 away from the filter 2 is removed, the compression spring rebounds linearly within the mounting groove 4c, quickly pressing the dust cover 3 back to the shielding position. In addition, the mounting groove 4c completely hides the elastic element 5 within the outer contour of the fixing frame 4, without occupying additional internal space of the housing 1, and can avoid interference between the compression spring and the housing 1 or other structures, ensuring the smooth sliding of the dust cover 3 and the long-term reliability of the automatic shielding function. It should be noted that the above example using a compression spring does not limit the beneficial effects of this embodiment to be achieved only by a compression spring, such as a tension spring, leaf spring, or other elastic element 5. The technical solution of this embodiment can also achieve the above-mentioned beneficial effects.

[0044] Further, please refer to Figure 2 , Figure 7 and Figures 8 to 10 In one embodiment of the present invention, a clearance slit 1b is formed on the housing 1, and the dust cover 3 is partially exposed in the clearance slit 1b.

[0045] In this embodiment, through-hole slits 1b are opened on both sides of the housing 1 along the insertion direction, so that the partial edge of the dust cover 3 is exposed, so as to link with the needle-shaped pusher 210 preset in the handle housing 200, so as to realize the automatic switching of the dust cover 3 to open when inserted and close when pulled out, further simplifying the operation and eliminating the need for manual adjustment of the dust cover 3, which is convenient, quick and easy and not easy to forget.

[0046] The recess slit 1b is a rectangular groove, the length of which can be set according to the maximum sliding stroke of the dust cover 3, and the width is sufficient to allow the needle-shaped pusher 210 inside the handle to enter. The two ends of the slit can be rounded to prevent the pusher from getting stuck when it is inserted. The pusher can directly abut against the dust cover 3. If space is limited, the area of ​​the dust cover 3 corresponding to the recess slit 1b can be extended outward to form a lug. The thickness of the lug is less than the width of the recess slit 1b, and the surface of the lug and the area where the pusher acts are smoothed to reduce frictional resistance. It can also be further combined with the elastic element 5 mentioned in the previous embodiment. When the housing 1 is pushed in along the handle slot, the pusher first passes through the recess slit 1b and then abuts against the front edge of the lug. As the housing 1 continues to go deeper, the pusher generates a backward force relative to the lug, pushing the dust cover 3 to compress the elastic element 5 and move away from the fixing groove 4a, and the filter 2 gradually becomes visible. When the housing 1 is pushed to the full position, the dust cover 3 is locked in the open position by the pusher, the first sealing element 32 separates from the end face of the fixing groove 4a, and the beam path is fully opened. After treatment, the housing 1 is removed, the pin moves forward relative to the lug, the elastic element 5 releases its stored energy, and the dust cover 3 is automatically pulled back to the shielding position. The first sealing element 32 presses the sealing groove end face again, and the filter 2 immediately returns to the closed state.

[0047] Through the passive mechanical linkage between the slit 1b and the needle-shaped pusher 210, the opening and closing of the dust cover 3 is synchronized with the insertion and removal of the housing 1. No additional manual steps are required, which not only ensures that the optical path is unobstructed before treatment, but also ensures that the filter 2 is always sealed and protected during non-use periods, further reducing the risk of dust contamination and improving clinical operation efficiency.

[0048] Further, please refer to Figure 2 and Figure 10 In one embodiment of the present invention, a stop protrusion 13 is formed at the end of the housing 1 that is away from the first window 11a and the second window 12a.

[0049] In this embodiment, a raised stop boss 13 is formed around the tail end of the housing 1, and the outer contour of the boss is larger than the lens mounting opening 200a of the handle housing 200. When the housing 1 is pushed in along the insertion direction, the front side of the boss abuts against the periphery of the lens mounting opening 200a, preventing the housing 1 from sliding further in, so that the tail end of the housing 1 is always exposed outside the handle, making it easy to pull out; at the same time, a visible seam is formed between the boss and the end face of the handle, reminding the operator that the housing 1 has been installed in place, avoiding excessive pushing that would make it impossible to remove. The edge of the boss can be chamfered to reduce collision damage with the end face of the handle, without affecting the overall appearance of the handle.

[0050] Further, please refer to Figure 3 and Figure 4 In one embodiment of the present invention, the housing 1 includes an upper housing 11 and a lower housing 12, which are detachably connected and enclose to form a receiving cavity 1a.

[0051] In this embodiment, the housing 1 is divided into an upper housing 11 and a lower housing 12, which together form a receiving cavity 1a. The upper housing 11 and the lower housing 12 can be detachably connected by snap-fit ​​and positioning post, or by directly setting screw holes on the upper housing 11 and the lower housing 12 and tightening screws to achieve a detachable connection. Taking the setting of snap-fit ​​and positioning post as an example, elastic snap-fit ​​with barbs extends downward from all four sides of the upper housing 11, and snap-fit ​​holes are opened at corresponding positions on the lower housing 12; during assembly, the snap-fit ​​passes through the snap-fit ​​holes and springs back to lock, forming a quick snap-fit. The positioning post is located on the inner wall of the lower housing 12 and fits with the blind hole on the inner side of the upper housing 11 to ensure that the window is coaxial after the upper and lower housings 12 are closed. When the filter 2 needs to be maintained, the upper and lower housings 12 can be separated by lightly pressing the snap-fit, and the fixing bracket 4 and the filter 2 are fully exposed, which can be directly removed for cleaning or replacement. The upper and lower housings 12 can then be closed to restore use. No tools are required, maintenance is convenient and avoids deformation of the housing 1 caused by prying.

[0052] This utility model also proposes a treatment handle 1000, which includes a handle housing 200 and a filter assembly 100 as described in any of the above embodiments. The handle housing 200 has a lens mounting opening 200a, which communicates with the inner cavity of the handle housing 200. The inner cavity of the handle housing 200 is provided with a pusher 210 opposite to the lens mounting opening 200a. The housing 1 is inserted into the inner cavity of the handle housing 200 through the lens mounting opening 200a, and the pusher 210 abuts against the dust cover 3 to keep the dust cover 3 away from the filter 2. Since this treatment handle 1000 adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0053] A lens mounting opening 200a is provided on one side of the handle housing 200, communicating with the internal cavity. A xenon lamp 240 and a light guide 250 are housed inside the handle housing 200, with a space between them. A pusher 210 is positioned within this space, allowing the filter 2 to be positioned between the xenon lamp 240 and the light guide 250 after insertion into the handle housing 200. The pusher 210 can be a block-shaped protrusion or other shapes, its function being to push the dust cover 3 to expose the filter 2 when the housing 1 is inserted into the handle housing 200. To improve the accuracy of the fit between the pusher 210 and the dust cover 3, preferably, two stainless steel needle-shaped pushers 210 are positioned opposite the opening on the bottom wall of the cavity, extending towards the lens mounting opening 200a. The filter assembly 100 includes a housing 1, a filter 2, and a dust cover 3. The housing 1 is used to partially insert into the treatment handle 1000. A receiving cavity 1a is formed inside the housing 1. A first window 11a and a second window 12a are respectively opened on opposite outer walls of the housing 1. The first window 11a and the second window 12a are arranged opposite to each other. The filter 2 is disposed inside the housing 1 and located between the first window 11a and the second window 12a. The dust cover 3 is slidably disposed on the housing 1 and can slide close to or away from the filter 2 to cover the filter 2 or expose the filter 2 in the first window 11a and the second window 12a. The filter assembly 100 also includes a mounting bracket 4, which is located within the receiving cavity 1a and connected to the housing 1. A mounting groove 4a is formed through the mounting bracket 4, and the filter 2 is fixedly disposed in the mounting groove 4a. A dust cover 3 is slidably fitted onto the mounting bracket 4 to slide closer to or further away from the mounting groove 4a. At least one elastic element 5 connects the dust cover 3 to the mounting bracket 4. A clearance slit 1b is formed on the housing 1, and part of the dust cover 3 is exposed within the clearance slit 1b. A stop boss 13 is formed at the end of the housing 1 furthest from the first window 11a and the second window 12a. The housing 1, with the dust cover 3 attached, is inserted into the lens mounting opening 200a. When the housing 1 reaches the predetermined depth, the pusher 210 passes through the clearance slot 1b and abuts against the dust cover 3, continuing to push it in. The pusher 210 pushes the dust cover 3 away from the filter 2, compressing the elastic element 5 and exposing the filter 2. At the same time, the stop boss 13 abuts against the periphery of the lens mounting opening 200a to prevent over-insertion. After treatment, the housing 1 is pulled out, the elastic element 5 is released, and the dust cover 3 automatically resets and covers the filter 2. The rest of the inner cavity of the handle housing 200 maintains the conventional optical path, cooling, and circuit structure, and can be directly compatible with this filter assembly 100 without modification, realizing the automatic dustproof function of exposing upon insertion and sealing upon removal.

[0054] Further, please refer to Figures 8 to 11In one embodiment of the present invention, the inner cavity of the handle housing 200 is provided with a dustproof door 220, the dustproof door 220 is hinged to the handle housing 200 and separates the lens mounting opening 200a from the inner cavity of the handle housing 200; and / or, the periphery of the lens mounting opening 200a is provided with a second sealing member 230, the second sealing member 230 slides against the outer peripheral wall of the housing 1.

[0055] In this embodiment, a hinged dustproof door 220 is added between the inner cavity of the handle housing 200 and the lens mounting opening 200a, so that after the filter assembly 100 is pulled out of the handle housing 200, the interior of the handle housing 200 is immediately isolated from the outside, preventing dust from entering the inner cavity of the handle housing 200. A second sealing element 230 is provided around the periphery of the lens mounting opening 200a to ensure a sliding seal between the outer wall of the housing 1 and the lens mounting opening 200a during insertion.

[0056] Specifically, the dustproof door 220 is a rectangular thin plate, made of the same material as the handle housing 200. A hinge shaft 221 is integrally formed on the dustproof door 220. The inner upper edge of the mirror mounting opening 200a is provided with a bearing seat or bushing for hinged connection with the hinge shaft 221. After assembly, the hinge shaft 221 and bearing seat are horizontally distributed, allowing the dustproof door 220 to rotate up and down around the axis of the hinge shaft 221. Furthermore, to enable the dustproof door 220 to close more sensitively, a [missing information - likely a design element] is fitted onto the hinge shaft 221. A torsion spring 222 has one end engaged with the inner wall of the handle housing 200, and the other end abutting against the side of the dustproof door 220 facing the inner cavity of the handle housing 200. In its natural state, the torsion spring 222 presses the dustproof door 220 against the opening, causing the free end of the dustproof door 220 to abut against the lower edge of the lens mounting opening 200a, thereby sealing the inner cavity of the handle housing 200. That is, the dustproof door 220 separates the lens mounting opening 200a from the inner cavity of the handle housing 200, preventing dust from entering. When the housing 1 is inserted, the front end of the housing 1 first contacts the dustproof door 220. Continuing to push it in overcomes the force of the torsion spring 222 and pushes the dustproof door 220 open, allowing the housing 1 to pass smoothly. After the housing 1 is pulled out, the torsion spring 222 immediately drives the dustproof door 220 to reset, and the dustproof door 220 automatically falls back and reseals the opening.

[0057] The second seal 230 is an annular silicone ring, which is embedded in the peripheral annular groove of the lens opening 200a. Its inner diameter is slightly smaller than the outer diameter of the housing 1, forming a slight interference fit. When the housing 1 is inserted or pulled out, the second seal 230 slides against the outer peripheral wall of the housing 1, continuously scraping off surface dust and providing a radial seal to prevent external dust from entering the handle cavity along the gap between the housing 1 and the opening.

[0058] Through the synergistic effect of the dustproof door 220 and the second seal 230, the handle housing 200 is sealed by the dustproof door 220 when the filter assembly 100 is not inserted, dynamically sealed by the second seal 230 when inserted, and closed again after being pulled out. This completely blocks dust from entering the optical path and the filter assembly 100, significantly extending the coating life of the filter 2, keeping the internal optical components of the handle clean, and ensuring stable treatment energy output.

[0059] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A filter assembly, characterized in that, The filter assembly includes: The housing (1) is used to partially insert into the handle shell (200) of the treatment handle. A receiving cavity (1a) is formed inside the housing (1). A first window (11a) and a second window (12a) are respectively opened on the opposite outer walls of the housing (1). The first window (11a) and the second window (12a) are arranged opposite to each other. A filter (2), the filter (2) being disposed within the housing (1) and located between the first window (11a) and the second window (12a); and A dust cover (3) is slidably disposed on the housing (1) and can slide close to or away from the filter (2) to cover the filter (2) or expose the filter (2) in the first window (11a) and the second window (12a).

2. The filter assembly as described in claim 1, characterized in that, The filter assembly also includes a mounting bracket (4), which is located inside the receiving cavity (1a) and connected to the housing (1); A fixing groove (4a) is formed on the fixing frame (4) through the fixing frame (4), and the filter (2) is fixedly disposed in the fixing groove (4a). The dust cover (3) is slidably fitted onto the fixing frame (4) to slide close to or away from the fixing groove (4a).

3. The filter assembly as described in claim 2, characterized in that, The fixing frame (4) is provided with a first guide part, and the dust cover (3) is provided with a second guide part. The first guide part and the second guide part are slidably connected. Of the first guide portion and the second guide portion, one is a guide protrusion (31), and the other is a guide groove (4b).

4. The filter assembly as described in claim 2, characterized in that, At least two first sealing elements (32) are provided on the dust cover (3). The two first sealing elements are located on both sides of the filter (2). When the dust cover (3) covers the filter (2), the first sealing element (32) seals the periphery of the first window (11a) and the dust cover (3). The first sealing element (32) seals the periphery of the second window (12a) and the dust cover (3).

5. The filter assembly as described in claim 2, characterized in that, The filter assembly also includes an elastic element (5), the two ends of which are connected to the fixing frame (4) and the dust cover (3) respectively, and push the dust cover (3) closer to the filter (2).

6. The filter assembly as described in claim 5, characterized in that, The mounting bracket (4) has a mounting groove (4c) formed thereon. The mounting groove (4c) extends along the sliding direction of the dust cover (3). The elastic member (5) is at least partially accommodated in the mounting groove (4c).

7. The filter assembly as claimed in claim 5, characterized in that, A clearance slit (1b) is formed on the housing (1), and the dust cover (3) is partially exposed in the clearance slit (1b).

8. The filter assembly as claimed in claim 1, characterized in that, A stop boss (13) is formed at one end of the housing (1) away from the first window (11a) and the second window (12a).

9. The filter assembly as claimed in claim 1, characterized in that, The housing (1) includes an upper shell (11) and a lower shell (12), which are detachably connected and enclose the receiving cavity (1a).

10. A treatment handpiece, characterized in that, The treatment handle includes a handle housing (200) and a filter assembly as described in any one of claims 1 to 9. A lens mounting opening (200a) is formed on the handle housing (200), and the lens mounting opening (200a) communicates with the inner cavity of the handle housing (200). The inner cavity of the handle housing (200) is provided with a pusher (210) disposed opposite to the lens mounting opening (200a). When the housing (1) is inserted into the inner cavity of the handle housing (200) through the lens opening (200a), the pusher (210) abuts against the dust cover (3) to move the dust cover (3) away from the filter (2).

11. The treatment handle as claimed in claim 10, characterized in that, The inner cavity of the handle housing (200) is provided with a dustproof door (220), which is hinged to the handle housing (200) and separates the lens opening (200a) from the inner cavity of the handle housing (200).

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