CN217121119U - Handheld laser cleaning head with dustproof function - Google Patents
Handheld laser cleaning head with dustproof function Download PDFInfo
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- CN217121119U CN217121119U CN202123374219.2U CN202123374219U CN217121119U CN 217121119 U CN217121119 U CN 217121119U CN 202123374219 U CN202123374219 U CN 202123374219U CN 217121119 U CN217121119 U CN 217121119U
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Abstract
The utility model provides a hand-held type laser cleaning head with dustproof function, including laser incident subassembly, laser outgoing subassembly and reflection subassembly, be provided with laser incident channel in the laser incident subassembly, be provided with laser outgoing channel in the laser outgoing subassembly, the transmission unit mount is in laser outgoing channel, laser incident subassembly is linked together with laser outgoing subassembly, be provided with first gas circuit way in the laser incident subassembly, be provided with the second gas circuit passageway that is linked together with first gas circuit way in the laser outgoing subassembly, the one end in first gas circuit way is connected with the intake pipe, the fixed gas curtain cover that is provided with of outgoing end of laser outgoing subassembly, be formed with the gas outlet between gas curtain cover and the laser outgoing subassembly, the gas outlet is towards laser outgoing direction slope, and the gas outlet is linked together with second gas circuit passageway. The utility model discloses with the gas circuit integration in laser cleaning head, except that the admission pipe, laser cleaning head outside does not have the pipeline, and is small and handy, one-hand operation is convenient, and the operation is convenient.
Description
Technical Field
The utility model relates to a laser equipment technical field especially relates to a hand-held type laser cleaning head with dustproof function.
Background
The laser cleaning is a novel cleaning technology in recent years, high-energy laser beams are utilized to irradiate the surface of a workpiece, so that dirt, rusty spots or a coating on the surface are instantaneously evaporated or peeled, attachments or surface coatings on the surface of the workpiece are effectively removed, and the laser cleaning is widely applied to the industries of aerospace, ships, automobiles, production and processing, tire rubber and plastic and the like.
In the cleaning operation process of the existing laser cleaning head, although any chemical agent and cleaning agent are not needed, the waste materials cleaned from the surface of a workpiece are basically solid powder, the powder is suspended around the laser cleaning head and easily enters the laser cleaning head and is gathered on the surface of a protective lens, and the protective lens is easily burnt after laser irradiation is heated, so that the laser cleaning operation is influenced.
At the present stage, the laser cleaning head that market has dust protection function, mostly adopt and increase the air knife in the cleaning head outside, the dust that the air knife produced in with the cleaning process is blown away from the cleaning head side, but in the in-service use in-process, the applicant discovers, to the hand-held type cleaning head, increase the air knife in the cleaning head outside, many gas circuit pipelines need to be connected, because the restriction of hand-held laser cleaning head volume, lead to many gas circuit pipelines can't monolithic stationary on hand-held type cleaning head, in the operation process, there is the condition that the gas circuit pipeline droops to the work piece, cause the gas circuit pipeline to influence the operation of laser cleaning head, need artifical hand-held gas circuit pipeline, from this, cause the operation not convenient, machining efficiency is low.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a hand-held type laser cleaning head with dustproof function solves and utilizes when blowing to remove dust, and the gas circuit pipeline can't be integrated with the laser cleaning head, the inconvenient problem of operation.
The technical scheme of the utility model is realized like this:
the utility model provides a hand-held laser cleaning head with dustproof function, which comprises a laser incidence component, a laser emitting component and a reflecting component, wherein a laser incidence channel is arranged in the laser incidence component, a laser emitting channel is arranged in the laser emitting component, the emitting component is arranged in the laser emitting channel, the laser incidence component is communicated with the laser emitting component, laser enters the laser incidence channel and is emitted out through the laser emitting channel after being reflected by the reflecting component, a protective lens for protecting a focusing lens is arranged in the laser emitting component, a first gas path channel is arranged in the laser incidence component, a second gas path channel is arranged in the laser emitting component, one end of the first gas path channel is communicated with the second gas path channel, the other end of the first gas path channel is connected with a gas inlet pipe, and a gas curtain cover is fixedly arranged at the emitting end of the laser emitting component, an air outlet is formed between the air curtain cover and the laser emitting assembly, the air outlet is inclined towards the laser emitting direction, and the air outlet is communicated with the second air channel.
On above-mentioned technical scheme's basis, it is preferred, the laser outgoing subassembly still includes the adapter, the protective glass is located the laser outgoing passageway, the protective glass is kept away from one side of light-emitting end and is installed the focus mirror, the lower extreme of adapter is connected with the laser incident subassembly, and reflection assembly installs in the corner of adapter, and second gas circuit passageway sets up in the adapter, and is located the handheld side of adapter, and the light-emitting end at the adapter is installed to the gas curtain cover.
Further, it is preferred, still be provided with the light-emitting apron between air curtain cover and the adapter, light-emitting apron demountable installation is at the light-emitting end of adapter, the outer terminal surface downside of light-emitting apron is provided with the mounting surface that is used for installing the air curtain cover, the mounting surface inclines towards laser outgoing direction, be provided with the third gas circuit passageway that is linked together with second gas circuit passageway in the light-emitting apron, be formed with the gas outlet between air curtain cover and the installation face, the gas outlet is linked together with third gas circuit passageway the gas outlet is the gap form.
Furthermore, preferably, a gas collecting cavity is formed between the gas curtain cover and the mounting surface, the gas collecting cavity is located at the lower end of the gas outlet, and the gas collecting cavity is communicated with the third gas path channel.
Furthermore, preferably, a light outlet is formed in the center of the light outlet end of the light outlet cover plate.
Preferably, a first sealing element is arranged between the light-emitting cover plate and the adapter.
On the basis of the technical scheme, preferably, the laser incidence assembly comprises a shell and a collimating lens, the shell is connected with the lower end of the adapter, a second sealing piece is arranged between the shell and the adapter, the first air passage is arranged in the shell and located on the handheld side of the shell, and the collimating lens is arranged in the laser incidence passage.
Further, preferably, the lower end of the shell is provided with at least two water injection ports, at least two cooling water channels are arranged in the shell, at least two water injection ports are respectively communicated with at least two cooling water channels, and at least two cooling water channels are mutually communicated at one end far away from the water injection ports.
On the basis of the technical scheme, preferably, the reflection assembly comprises an installation cover, a vibrating mirror motor and a reflection sheet, the installation cover is detachably installed at a corner of the adapter, the vibrating mirror motor is fixedly installed in the installation cover, an output shaft of the vibrating mirror motor is connected with the reflection sheet, and the reflection lens and the laser light path are arranged at an angle of 30-60 degrees.
Preferably, an optical fiber connector communicated with the laser incidence channel is installed at the bottom end of the shell, and a third sealing element is arranged between the optical fiber connector and the shell.
The utility model discloses following beneficial effect has for prior art:
(1) the utility model discloses a hand-held type laser cleaning head through set up first gas circuit way in laser incident subassembly, set up second gas circuit passageway in the laser outgoing subassembly, the one end and the first gas circuit way of second gas circuit passageway are linked together, the other end of second gas circuit passageway is connected with the intake pipe, the fixed gas curtain cover that is provided with of outgoing end of laser outgoing subassembly, be formed with the gas outlet between gas curtain cover and the laser outgoing subassembly, the gas outlet inclines towards laser outgoing direction, and the gas outlet is linked together with first gas circuit way. The structure sets up from this, blows in to the gas curtain cover through the gas circuit pipeline for form the gas curtain at the gas outlet, thereby make and can blow away the dust before the protective glass, avoid the dust gathering on the protective glass surface, laser irradiation is heated and is burnt the protective glass, plays the effect of protection inner assembly. Meanwhile, the gas circuit is integrated in the laser cleaning head, and no pipeline is arranged outside the laser cleaning head except the gas inlet pipe, so that the whole handheld laser cleaning head is compact in structure, light and handy in volume, convenient to operate by one hand and convenient and fast to operate;
(2) the light-emitting cover plate is arranged between the air curtain cover and the adapter, so that the optical lens can be conveniently installed in the adapter, and the maintenance is convenient;
(3) the air outlet is arranged in a gap shape, so that the blown air flow is in an air curtain shape and can cover the light-emitting end of the adapter, and further, the dust at the light-emitting end of the adapter can be efficiently blown away;
(4) the gas collecting cavity is arranged between the gas curtain cover and the light-emitting cover plate, gas flows in the gas collecting cavity and flows out through the gap-shaped gas outlet to form high impact force, and the gas flow flowing out of the gas outlet is in a gas curtain shape and forms a certain angle with the emergent light of laser, so that dust in front of the protective mirror can be blown away in the laser cleaning process;
(5) the center of the light outlet end of the light outlet cover plate is provided with the light outlet, so that laser can directly penetrate through the light outlet to irradiate the surface of a workpiece;
(6) by arranging the first sealing element, the second sealing element and the third sealing element, dust is prevented from entering from gaps among all parts, and the sealing performance of the whole laser cleaning head is improved;
(7) through set up the cooling water passageway in the casing, can dispel the heat the cooling to handheld position, improve the security of laser cleaning head.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic perspective view of a hand-held laser cleaning head disclosed in the present invention;
fig. 2 is a schematic plane structure diagram of the hand-held laser cleaning head disclosed by the present invention;
FIG. 3 is an enlarged view of a portion A of FIG. 2;
fig. 4 is a schematic view of the internal structure of the housing disclosed in the present invention;
the attached drawings are as follows:
1. a laser incident assembly; 2. a laser emitting assembly; 3. a reflective component; 10. a laser incident channel; 20. a laser emitting channel; 21. protective glasses; 22. a focusing mirror; 11. a first gas circuit channel; 23. a second gas path channel; 24. an air curtain cover; 241. an air outlet; 12. an air inlet pipe; 25. an adapter; 100. a first seal member; 4. a light-emitting cover plate; 242. a gas collection cavity; 41. a light outlet; 42. a third gas path channel; 13. a housing; 14. a collimating lens; 31. mounting a cover; 32. a galvanometer motor; 33. a reflective sheet; 200. a second seal member; 5. an optical fiber splice; 300. a third seal member; 131. a water injection port; 132. a cooling water passage.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
As shown in fig. 1, combine fig. 2 and 3, the embodiment of the utility model discloses a hand-held type laser cleaning head with dustproof function, including laser incident subassembly 1, laser outgoing subassembly 2 and reflection assembly 3.
Be provided with laser incident channel 10 in the laser incident subassembly 1, be provided with laser outgoing channel 20 in the laser outgoing subassembly 2, the transmission subassembly is installed in laser outgoing channel 20, and laser incident subassembly 1 is linked together with laser outgoing subassembly 2, and laser gets into in the laser incident channel 10 and jets out through laser outgoing channel 20 after the reflection of reflection assembly 3, sets up the protective glass 21 that is used for carrying out the protection to focusing mirror 22 in the laser outgoing subassembly 2.
During the cleaning operation of the laser cleaning head, the waste materials cleaned from the surface of the workpiece are basically solid powder, the powder is suspended around the laser cleaning head and easily enters the laser cleaning head and is gathered on the surface of the protective lens 21, and the protective lens 21 is easily burnt after laser irradiation is heated, so that the laser cleaning operation is influenced.
Therefore, in the current stage, the blowing pipeline is additionally arranged outside the cleaning head, so that the structure of the handheld laser cleaning head is complex and the size is large, the scattered gas circuit pipeline needs to be manually cleaned, and the operation is troublesome.
Specifically, a first air channel 11 is arranged in the laser incidence assembly 1, a second air channel 23 is arranged in the laser emission assembly 2, one end of the first air channel 11 is communicated with the second air channel 23, the other end of the first air channel 11 is connected with an air inlet pipe 12, an air curtain cover 24 is fixedly arranged at the emission end of the laser emission assembly 2, an air outlet 241 is formed between the air curtain cover 24 and the laser emission assembly 2, the air outlet 241 inclines towards the laser emission direction, and the air outlet 241 is communicated with the first air channel 11.
From this setting, blow in to gas curtain cover 24 through the gas circuit pipeline for form the gas curtain at gas outlet 241, thereby make and blow away the dust before protective glass 21, avoid the dust gathering on protective glass 21 surface, laser irradiation is heated and is burnt protective glass 21, plays the effect of protection inner assembly. Simultaneously the utility model discloses with the gas circuit integration in laser cleaning head, except intake pipe 12, the outside no pipeline of laser cleaning head for whole hand-held type laser cleaning head compact structure, it is light and handy, one-hand operation is convenient, and the operation is convenient.
The utility model discloses still specifically realize through following technical scheme.
As some embodiments, the laser emitting assembly 2 in this embodiment further includes an adapter 25, the adapter 25 is of a bending type, the protection mirror 21 is located in the laser emitting channel 20, a focusing mirror 22 is installed on one side of the protection mirror 21 away from the light emitting end, the lower end of the adapter 25 is connected to the laser incident assembly 1, the reflection assembly 3 is installed at a corner of the adapter 25, and for this reason, after the laser is reflected by the reflection assembly 3, the laser is focused and emitted through the focusing mirror 22, so that the workpiece is cleaned.
The second air channel 23 is arranged in the adapter 25 and located on the handheld side of the adapter 25, and the air curtain cover 24 is installed at the light emitting end of the adapter 25. Therefore, when the cleaning head is conveniently held by a hand, the air inlet pipe 12 connected with the second air channel 23 does not interfere with the holding of the hand.
Be provided with first sealing member 100 between light-emitting apron 4 and adapter 25, from this setting, avoid the dust to get into from each part clearance, improve whole laser cleaning head sealing performance.
As some preferred embodiments, a light-emitting cover plate 4 is further disposed between the air curtain cover 24 and the adapter 25, and the light-emitting cover plate 4 is detachably mounted at the light-emitting end of the adapter 25, so that it is convenient to mount optical lenses in the adapter 25 and also convenient to maintain. Specifically, the light-emitting cover plate 4 can be detachably connected with the adapter 25 in a hinged and buckled mode, and what needs to be described is that the structure is changed to belong to the prior art, which is not described in detail. Of course, other prior art techniques can also be used for the detachable mode, and are not limited in detail here. An installation surface for installing the air curtain cover 24 is arranged below the outer end surface of the light-emitting cover plate 4, and the installation surface inclines towards the laser emitting direction, and the inclination angle can be preferably set to be 30-80 degrees. A third air channel 42 communicated with the second air channel 23 is arranged in the light-emitting cover plate 4, an air outlet 241 is formed between the air curtain cover 24 and the mounting surface, and the air outlet 241 is communicated with the third air channel 42. the air outlet 241 is in a gap shape. Set to the gap form through making gas outlet 241, can make the air current that blows away be the gas curtain form, and can cover adapter 25 light-emitting end, and then can blow away the dust of adapter 25 light-emitting end by the efficient.
In this embodiment, a gas collecting chamber 242 is further formed between the gas curtain cover 24 and the mounting surface, the gas collecting chamber 242 is located at the lower end of the gas outlet 241, and the gas collecting chamber 242 is communicated with the third gas path channel 42. Through set up gas collecting cavity 242 between gas curtain cover 24 and light-emitting apron 4, gas flows in gas collecting cavity 242 to flow out through gap form gas outlet 241, form high impact force, the air current that flows out from gas outlet 241 is the gas curtain form, and is certain angle with the emergent light of laser, thereby makes and can blow away the dust before protective glass 21 at laser cleaning's in-process.
Light-emitting apron 4 is for cooperating the laser outgoing, need derive laser, in order to protect protective glass 21 among the prior art, the glass that adopts transparent material generally installs additional on light-emitting apron 4, though the problem of protective glass 21 laying dust has been solved to a certain extent, nevertheless laser when passing transparent material's glass, still has the problem existence of laser refraction angle skew, also can cause laser ablation to protective glass, for this reason, the utility model discloses light-emitting port 41 has been seted up in light-emitting port center department of light-emitting apron 4 for laser directly passes light-emitting port 41, does not receive any and shelters from, and the gas curtain effect of gas outlet 241 is deuterogamied, can make the dust clear. In this embodiment, the light outlet 41 is provided with a groove shape, which is just adapted to the laser beam to pass through, and the light outlet 41 is too large, which causes dust to enter, and too small can block the laser beam.
As some preferred embodiments, the laser light incidence assembly 1 comprises a housing 13 and a collimating lens 14, the collimating lens 14 being capable of generating a directed light beam with a well-defined diameter, thereby allowing to convert a diverging light beam into a parallel light beam. Casing 13 is connected with adapter 25's lower extreme, and is provided with second sealing member 200 between casing 13 and the adapter 25, guarantees sealing connection between casing 13 and the adapter 25, and the dust gets into from each parts clearance, improves whole laser cleaning head sealing performance. The first air passage 11 is disposed in the housing 13 on the hand-held side of the housing 13, and the collimating lens 14 is disposed in the laser incident passage 10. With the arrangement, when the shell 13 is conveniently held by a person, the air inlet pipe 12 connected with the first air passage 11 does not interfere with the holding of the person.
Referring to fig. 4, at least two water injection ports 131 are disposed at the lower end of the housing 13, at least two cooling water channels 132 are disposed inside the housing 13, the at least two water injection ports 131 are respectively communicated with the at least two cooling water channels 132, and the at least two cooling water channels 132 are communicated with each other at an end away from the water injection ports 131. Through set up cooling water channel 132 in casing 13, can dispel the heat and cool down to the handheld position, improve the security of laser cleaning head.
Preferably, the reflection assembly 3 includes an installation cover 31, a mirror motor 32 and a reflection sheet 33, the installation cover 31 is detachably installed at a corner of the adapter 25, the mirror motor 32 is fixedly installed in the installation cover 31, an output shaft of the mirror motor 32 is connected with the reflection sheet 33, and the reflection lens and the laser light path are arranged at an angle of 30-60 degrees. From this setting, reflection component 3 can be unpicked and washed and install in adapter 25's corner, and the maintenance is dismantled to the part in the reflection component 3 to the convenience, and through rotatory mirror motor 32 that shakes, the reflector plate 33 on the mirror motor 32 that shakes can be rotatory along with the mirror motor 32 that shakes simultaneously, and then utilizes reflector plate 33 to change the laser light path. It should be noted that the reflection assembly 3 and the principle described above belong to the prior art.
The bottom end of the housing 13 is provided with an optical fiber connector 5 communicated with the laser incidence channel 10, and a third sealing member 300 is arranged between the optical fiber connector 5 and the housing 13. Through the fiber joint 5, the laser light source can be transmitted into the laser incident channel 10 through the fiber joint 5.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A handheld laser cleaning head with a dustproof function comprises a laser incidence component (1), a laser emitting component (2) and a reflection component (3), wherein a laser incidence channel (10) is arranged in the laser incidence component (1), a laser emitting channel (20) is arranged in the laser emitting component (2), a transmitting component is installed in the laser emitting channel (20), the laser incidence component (1) is communicated with the laser emitting component (2), laser enters the laser incidence channel (10) and is emitted out through the laser emitting channel (20) after being reflected by the reflection component (3), a protective mirror (21) used for protecting a focusing mirror (22) is arranged in the laser emitting component (2), and the handheld laser cleaning head is characterized in that a first gas channel (11) is arranged in the laser incidence component (1), and a second gas channel (23) is arranged in the laser emitting component (2), one end of the first air channel (11) is communicated with the second air channel (23), the other end of the first air channel (11) is connected with an air inlet pipe (12), an air curtain cover (24) is fixedly arranged at the emitting end of the laser emitting component (2), an air outlet (241) is formed between the air curtain cover (24) and the laser emitting component (2), the air outlet (241) inclines towards the laser emitting direction, and the air outlet (241) is communicated with the second air channel (23).
2. The hand-held laser cleaning head with dust-proof function of claim 1, wherein: laser outgoing subassembly (2) still include adapter (25), protective glass (21) are located laser outgoing passageway (20), one side that the light-emitting end was kept away from in protective glass (21) is installed focusing mirror (22), the lower extreme of adapter (25) is connected with laser incident subassembly (1), and the corner department at adapter (25) is installed in reflection subassembly (3), and second gas circuit passageway (23) set up in adapter (25), and are located the handheld side of adapter (25), and the light-emitting end in adapter (25) is installed in gas curtain cover (24).
3. The hand-held laser cleaning head with a dust-proof function as claimed in claim 2, wherein: still be provided with light-emitting cover board (4) between air curtain cover (24) and adapter (25), light-emitting cover board (4) demountable installation is held at the light-emitting of adapter (25), the outer terminal surface downside of light-emitting cover board (4) is provided with the installation face that is used for installing air curtain cover (24), the installation face inclines towards laser outgoing direction, be provided with third gas circuit passageway (42) that are linked together with second gas circuit passageway (23) in light-emitting cover board (4), be formed with gas outlet (241) between air curtain cover (24) and the installation face, gas outlet (241) are linked together with third gas circuit passageway (42) gas outlet (241) are the gap form.
4. The hand-held laser cleaning head with a dust-proof function of claim 3, wherein: a gas collecting cavity (242) is further formed between the gas curtain cover (24) and the mounting surface, the gas collecting cavity (242) is located at the lower end of the gas outlet (241), and the gas collecting cavity (242) is communicated with the third gas path channel (42).
5. The hand-held laser cleaning head with a dust-proof function according to claim 3, wherein: the center of the light-emitting end of the light-emitting cover plate (4) is provided with a light-emitting port (41).
6. The hand-held laser cleaning head with a dust-proof function according to claim 3, wherein: a first sealing element (100) is arranged between the light-emitting cover plate (4) and the adapter (25).
7. The hand-held laser cleaning head with a dust-proof function as claimed in claim 2, wherein: laser incident assembly (1) includes casing (13) and collimating lens (14), casing (13) are connected with the lower extreme of adapter (25), and are provided with second sealing member (200) between casing (13) and adapter (25), and first gas path (11) set up in casing (13), and are located the handheld side of casing (13), and collimating lens (14) set up in laser incident passageway (10).
8. The hand-held laser cleaning head with a dust-proof function of claim 7, wherein: the water cooling device is characterized in that at least two water injection ports (131) are formed in the lower end of the shell (13), at least two cooling water channels (132) are formed in the shell (13), at least two water injection ports (131) are communicated with at least two cooling water channels (132) respectively, and at least two cooling water channels (132) are communicated with one end, far away from the water injection ports (131), of each other.
9. The hand-held laser cleaning head with a dust-proof function as claimed in claim 2, wherein: reflection component (3) are including installation cover (31), mirror motor (32) and reflector plate (33) shake, installation cover (31) demountable installation is in the corner of adapter (25), shakes mirror motor (32) fixed mounting in installation cover (31), shakes the output shaft and the reflector plate (33) of mirror motor (32) and is connected, and the reflector plate becomes 30 ~ 60 jiaos with laser light path and sets up.
10. The hand-held laser cleaning head with a dust-proof function of claim 7, wherein: the optical fiber connector is characterized in that an optical fiber connector (5) communicated with the laser incidence channel (10) is installed at the bottom end of the shell (13), and a third sealing element (300) is arranged between the optical fiber connector (5) and the shell (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123374219.2U CN217121119U (en) | 2021-12-29 | 2021-12-29 | Handheld laser cleaning head with dustproof function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123374219.2U CN217121119U (en) | 2021-12-29 | 2021-12-29 | Handheld laser cleaning head with dustproof function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217121119U true CN217121119U (en) | 2022-08-05 |
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ID=82619030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123374219.2U Active CN217121119U (en) | 2021-12-29 | 2021-12-29 | Handheld laser cleaning head with dustproof function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217121119U (en) |
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2021
- 2021-12-29 CN CN202123374219.2U patent/CN217121119U/en active Active
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