CN214119934U - Explosion-proof light transmission structure and explosion-proof lamp - Google Patents
Explosion-proof light transmission structure and explosion-proof lamp Download PDFInfo
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- CN214119934U CN214119934U CN202120355206.1U CN202120355206U CN214119934U CN 214119934 U CN214119934 U CN 214119934U CN 202120355206 U CN202120355206 U CN 202120355206U CN 214119934 U CN214119934 U CN 214119934U
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Abstract
The utility model discloses an explosion-proof light transmission structure, including light source, first lens and second lens, light source, first lens and second lens are arranged according to the preface along the same optical axis and are set up, and first lens set up in the light-emitting side of light source, and the second lens sets up in the light-emitting side of first lens, and the luminous half angle minimum of second lens emergent light is 0.9 degrees; the light source comprises a first lens, a second lens, a metal base, a light source radiator and a lens fixing frame, wherein the first lens is fixedly connected with the second lens, the metal base is arranged at the bottom of the light source and is connected with the light source radiator, and the lens fixing frame is arranged below the first lens and is fixedly connected with the first lens. The utility model discloses still disclose an explosion-proof lamp, including explosion-proof chamber, printing opacity chamber and light transmission structure. The utility model provides an explosion-proof lamp light transmission structure, light source irradiation intensity is high, and the spotlight degree can reach 0.9, has advantages such as light transmission structure is big, good heat dissipation, explosion-proof performance is good, overall structure is compact.
Description
Technical Field
The utility model belongs to the laser lighting field especially relates to an explosion-proof light transmission structure and explosion-proof lamp.
Background
With the rapid development of industries such as petroleum, chemical industry, mining industry and the like, explosion-proof lamps are used more and more frequently in scenes such as production, fire fighting, electric power, industrial and mining, rescue and the like, the variety of the explosion-proof lamps is more and more, and the performance of various explosion-proof lamps is suitable for different field operations, such as the use requirements of illumination of geological exploration, rescue and disaster resistance, travel exploration, fire control command, electric power rush repair and the like.
The light source in the existing explosion-proof lamp generally adopts an LED light source, which is a light-emitting diode light source, and the LED light source has the advantages of small volume, low power consumption, high efficiency, long service life and the like, but the LED light source also has the defects, such as low color rendering property, insufficient central brightness of the LED light source and the like in white light illumination.
Along with the development and application of a novel semiconductor laser technology, a laser light source brings a new solution for portable illumination, and due to the fact that laser energy is concentrated, the portable illumination device has very good directivity and is very close to an ideal point light source, the effective illumination distance can be greatly increased, the function of a laser illumination lamp is greatly expanded due to the ultrahigh brightness of laser, and multiple purposes are achieved.
In order to meet different application scenes, the laser explosion-proof lamp needs to meet the requirement of irradiation intensity, the power requirement of a light source is high, the requirement on an optical transmission structure is high, the heat dissipation is good, and the explosion-proof requirement needs to be met, so that the optical transmission overall structure of the laser explosion-proof lamp needs to be designed and optimized to meet the requirement of various industries on novel laser explosion-proof lamps.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an explosion-proof light transmission structure has the light source and shines the performance such as intensity height, light transmission structure is big, good heat dissipation, explosion-proof can be good.
The utility model provides an explosion-proof light transmission structure, including light source, first lens and second lens, light source, first lens and second lens are arranged the setting according to the preface along the same optical axis, and first lens set up in the light-emitting side of light source, and the second lens sets up in the light-emitting side of first lens, and the luminous half angle minimum of the light of second lens outgoing is 0.9.
Further, the light source is a laser light source, and the light-emitting half angle is 38-42 degrees.
Furthermore, the first lens is a plano-concave lens, the plano-concave lens is provided with a light inlet surface and a light outlet surface, the light inlet surface of the plano-concave lens is a plane perpendicular to the optical axis, and the light outlet surface of the plano-concave lens is a concave surface.
Further, the center thickness CT of the plano-concave lens on the optical axis1The value satisfies: CT of 1.8mm or less1≤2.2mm。
Further, the edge thickness ET of the plano-concave lens1The value satisfies: ET not less than 8mm1≤9mm。
Further, the outer diameter d of the plano-concave lens1The value satisfies: d is not less than 48mm1≤52mm。
Furthermore, a gap T between the light inlet surface of the plano-concave lens and the light outlet of the light source along the optical axis01The value satisfies the conditional expression: t is01≤1mm。
Furthermore, the second lens is a convex lens, the convex lens is provided with a light inlet surface and a light outlet surface, the light inlet surface of the convex lens is a convex surface, and the light outlet surface of the convex lens is a convex surface.
Further, the center thickness CT of the convex lens on the optical axis2The value satisfies: CT (computed tomography) of not less than 32mm2≤38mm。
Further, the edge thickness ET of the convex lens2The value satisfies: ET not less than 4mm2≤4.5mm。
Further, the outer diameter d of the convex lens2The value satisfies: d is more than or equal to 128mm2≤132mm。
Further, an on-axis distance T from the light inlet surface of the first lens to the center of the second lens on the optical axis12The value satisfies: t is more than or equal to 103mm12≤110mm。
Furthermore, the explosion-proof lamplight transmission structure further comprises toughened glass, the toughened glass is arranged between the first lens and the second lens, and the toughened glass is provided with a light inlet surface and a light outlet surface.
Further, the center thickness CT of the tempered glass on the optical axis3The value satisfies: CT of 9.5mm or less3≤10.5mm。
Further, the outer diameter d of the tempered glass3The value satisfies: d is not less than 78mm3≤80mm。
Furthermore, the light inlet surface and the light outlet surface of the toughened glass are respectively plated with an explosion-proof film, and the explosion-proof film is an antireflection film.
Further, the light source includes a metal base, and the metal base is fixedly arranged at the bottom of the light source.
Furthermore, both sides of the metal base are respectively provided with at least one mounting through hole.
Furthermore, explosion-proof light transmission structure still includes the light source radiator, and the both sides of light source radiator have at least one installation through-hole respectively.
Furthermore, the mounting through holes on two sides of the metal base are respectively and correspondingly communicated with the mounting through holes on two sides of the light source radiator and are connected through bolts penetrating through the mounting through holes.
Furthermore, explosion-proof light transmission structure still includes a lens mount, and the lens mount sets up in the below of first lens to first lens and lens mount fixed connection.
Furthermore, the lens fixing frame is fixedly connected with the light source radiator to realize the function of fixedly supporting the first lens.
Another aspect of the utility model provides an explosion-proof lamp, including explosion-proof chamber, printing opacity chamber and foretell explosion-proof light transmission structure, explosion-proof chamber and printing opacity chamber fixed connection, light source and first lens are fixed to be set up in explosion-proof chamber, and the second lens is fixed to be set up in the printing opacity chamber.
Furthermore, explosion-proof chamber passes through explosion-proof screw thread fixed connection with the printing opacity chamber, and explosion-proof light transmission structure includes toughened glass, and toughened glass passes through the fixed inside that sets up in explosion-proof chamber and printing opacity chamber fixed connection department of toughened glass collar.
Further, the internal surface in explosion-proof chamber has the slide rail structure, and explosion-proof light transmission structure includes the light source radiator, and the lower surface of light source radiator has the spout structure, and the spout structure of light source radiator and the slide rail structure adaptation installation of explosion-proof intracavity surface to realize the effect that the light source is portable fixed in explosion-proof intracavity.
Further, the light transmission cavity comprises a light transmission cavity shell, a lens fixing ring and a focusing structure, the lens fixing ring is arranged inside the light transmission cavity shell, the focusing structure is slidably fixed on the light transmission cavity shell, and the lens fixing ring is adaptively and fixedly connected with the focusing structure.
Furthermore, the focusing structure comprises a focusing outer ring structure, a focusing inner ring structure and a positioning pin, the focusing outer ring structure is sleeved outside the light-transmitting cavity shell, the focusing inner ring structure is arranged inside the light-transmitting cavity, a guide groove penetrating through the inner surface and the outer surface of the light-transmitting cavity shell is formed in the light-transmitting cavity shell, the positioning pin penetrates through the guide groove, one end of the positioning pin is fixedly connected with the inner surface of the focusing outer ring structure, and the other end of the positioning pin is fixedly connected with the outer surface of the focusing inner ring structure.
Further, the guide groove is a chute.
Further, the second lens is fixed inside the light transmitting cavity by a lens fixing ring.
The utility model has the advantages that:
the utility model provides an explosion-proof lamp light transmission structure, light source irradiation intensity is high, and the spotlight degree can reach 0.9, has advantages such as light transmission structure is big, good heat dissipation, explosion-proof performance is good, overall structure is compact.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of the structure of the explosion-proof lamp of the present invention;
FIG. 2 is a sectional view of the explosion-proof lamp of the present invention;
fig. 3 is a schematic view of the explosion-proof light transmission structure of the present invention;
fig. 4 is a sectional view of the explosion-proof light transmission structure of the present invention;
fig. 5 is a front view of the explosion-proof light transmission structure of the present invention;
fig. 6 is a rear view of the explosion-proof light transmission structure of the present invention;
fig. 7 is a top view of the explosion-proof light transmission structure of the present invention;
fig. 8 is a bottom view of the explosion-proof light transmission structure of the present invention;
FIG. 9 is an exploded view of the explosion-proof lamp of the present invention;
fig. 10 is an exploded view of the light-transmitting cavity structure of the present invention.
The reference numbers illustrate:
10 an explosion-proof lamp;
20 explosion-proof cavities;
30 light-transmitting cavities;
40 a light transmissive cavity housing;
50 lens fixing rings;
60 a focus adjustment structure;
61 focusing the outer ring structure;
62 focusing the inner ring structure;
63 positioning pins;
100 an explosion-proof light transmission structure;
200 light sources;
210 a metal base;
220 a light source heat sink;
300 a first lens;
400 toughened glass;
500 a second lens;
600 lens holder.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in 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 efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Fig. 1 is the utility model discloses an explosion-proof lamp structure schematic diagram, fig. 2 is the utility model discloses an explosion-proof lamp structure cross-sectional view, fig. 3 is the utility model discloses an explosion-proof light transmission structure's schematic diagram, fig. 4 is the utility model discloses an explosion-proof light transmission structure cross-sectional view.
As shown in fig. 1 to 4, the utility model discloses an explosion-proof light transmission structure 100 includes light source 200, first lens 300 and second lens 500, and light source 200, first lens 300 and second lens 500 are arranged according to the preface along the same optical axis and are set up, and first lens 300 sets up in the light-emitting side of light source 200, and second lens 500 sets up in the light-emitting side of first lens 300, and the luminous half angle minimum that the emergent light of second lens 500 is 0.9.
Fig. 5 is the front view of the explosion-proof light transmission structure of the present invention, fig. 6 is the rear view of the explosion-proof light transmission structure of the present invention, fig. 7 is the top view of the explosion-proof light transmission structure of the present invention, fig. 8 is the bottom view of the explosion-proof light transmission structure of the present invention.
In this embodiment, the light source 200 is a laser light source, the light source emitted by the laser light source 200 is a point light source, and the light emitting intensity of the laser light source 200 is 773cd/mm2The light-emitting half angle is 38-42 degrees. The service life of the laser light source 200 is not less than 5000 hours, and in the present embodiment, the service life of the laser light source 200 is 10000 hours.
The driving current of the laser light source 200 ranges from 0.5A to 2.5A, and in this embodiment, the driving current of the laser light source 200 is 2.5A. The driving voltage of the laser light source 200 ranges from 4V to 4.6V, and in this embodiment, the driving voltage of the laser light source 200 is 4.2V. The minimum value of the luminous flux of the laser light source 200 is 1500lm, and in the present embodiment, the luminous flux value of the laser light source 200 is 1700 lm.
In this embodiment, the first lens 300 is a plano-concave lens, the plano-concave lens 300 is a disc-shaped structure, the plano-concave lens 300 has a light-entering surface and a light-exiting surface, the light-entering surface of the plano-concave lens 300 is a plane perpendicular to the optical axis, and the light-exiting surface of the plano-concave lens 300 is a concave surface. The first lens element 300 is made of plastic or glass.
The center thickness of the plano-concave lens 300 on the optical axis is CT1，CT1The value satisfies: CT of 1.8mm or less12.2mm or less, in this example, CT12 mm. Plano-concave lens 300 has an edge thickness ET1，ET1The value satisfies: ET not less than 8mm19mm or less, in this example ET1＝8.5mm。
The plano-concave lens 300 has an outer diameter d1，d1The value satisfies: d is not less than 48mm152mm or less, in this example, d1＝50mm。
The light inlet surface of the plano-concave lens 300 and the light outlet of the light source 200 have a gap T along the optical axis01，T01The value satisfies the conditional expression: t is011mm or less, in this example, T01＝0.5mm。
In this embodiment, the second lens 500 is a convex lens, the convex lens 500 is a disc-shaped structure, the convex lens 500 has a light inlet surface and a light outlet surface, the light inlet surface of the convex lens 500 is a convex surface, and the light outlet surface of the convex lens 500 is a convex surface. The second lens element 500 is made of plastic or glass.
The convex lens 500 has a central thickness CT on the optical axis2，CT2The value satisfies: CT (computed tomography) of not less than 32mm238mm or less, in this example, CT235 mm. The convex lens 500 has an edge thickness ET2，ET2The value satisfies: ET not less than 4mm24.5mm or less, in this example ET2＝4.07mm。
The convex lens 500 has an outer diameter d2，d2The value satisfies: d is more than or equal to 128mm2132mm or less, in this example, d2＝130mm。
The axial distance from the light inlet surface of the plano-concave lens 300 to the center of the convex lens 500 on the optical axis is T12，T12The value satisfies: t is more than or equal to 103mm12110mm or less, in this example, T12＝106.7mm。
In this embodiment, the explosion-proof light transmission structure 100 further includes a tempered glass 400, the tempered glass 400 is disposed between the first lens 300 and the second lens 500, the tempered glass 400 is a disc-shaped structure, the tempered glass 400 has a light inlet surface and a light outlet surface, and the center thickness of the tempered glass 400 on the optical axis is CT3，CT3The value satisfies: CT of 9.5mm or less310.5mm or less, in this example, CT310mm, the outer diameter of the tempered glass 400 is d3，d3The value satisfies: d is not less than 78mm380mm or less, in this example, d3＝79mm。
The light inlet surface and the light outlet surface of the toughened glass 400 are respectively plated with an explosion-proof film, the explosion-proof film is an antireflection film with high flatness, and the explosion-proof film plays a role in reducing light loss when light passes through the toughened glass 400.
The light source 200 includes a metal base 210, the metal base 210 is fixedly disposed at the bottom of the light source 200, two sides of the metal base 210 are respectively provided with at least one mounting through hole, in this embodiment, the metal base 210 is made of a copper base plate, two sides of the metal base 210 are respectively provided with 2 mounting through holes, and the mounting through holes are kidney-shaped.
The explosion-proof light transmission structure 100 further includes a light source heat sink 220, at least one mounting through hole is respectively disposed on two sides of the light source heat sink 220, in this embodiment, 2 mounting through holes are respectively disposed on two sides of the light source heat sink 220, the mounting through holes are circular through holes, the light source heat sink 220 is made of a heat conductive material, the lower surface of the light source heat sink 220 is fixed inside the explosion-proof lamp 10, heat generated by the light source 200 can be transmitted to the housing of the explosion-proof lamp 10 through the light source heat sink 220, and then the heat is dissipated to the external environment from the housing of the explosion-proof lamp 10.
The mounting through holes on both sides of the metal base 210 are respectively and correspondingly communicated with the mounting through holes on both sides of the light source heat sink 220, and are connected by bolts passing through the mounting through holes.
The explosion-proof light transmission structure 100 further includes a lens fixing frame 600, the lens fixing frame 600 is disposed below the first lens 300, the first lens 300 is fixedly connected to the lens fixing frame 600, and the lens fixing frame 600 is fixedly connected to the light source heat sink 220, so as to fixedly support the first lens 300.
Fig. 9 is the exploded view of the explosion-proof lamp structure of the present invention, as shown in fig. 9, another aspect of the present invention provides an explosion-proof lamp 10, which comprises an explosion-proof chamber 20, a transparent chamber 30 and the above-mentioned explosion-proof light transmission structure 100, wherein the explosion-proof chamber 20 is fixedly connected to the transparent chamber 30, the light source 200 and the first lens 300 are fixedly disposed in the explosion-proof chamber 20, and the second lens 500 is fixedly disposed in the transparent chamber 30.
In this embodiment, explosion-proof chamber 20 passes through explosion-proof screw thread fixed connection with light-transmitting chamber 30, and explosion-proof light transmission structure 100 includes toughened glass 400, and toughened glass 400 passes through the fixed inside that sets up in explosion-proof chamber 20 and light-transmitting chamber 30 fixed connection department of toughened glass collar.
In this embodiment, the inner surface of the explosion-proof cavity 20 has a sliding rail structure, the explosion-proof light transmission structure 100 includes a light source heat sink 220, the lower surface of the light source heat sink 220 has a sliding groove structure, and the sliding groove structure of the light source heat sink 220 is mounted in a matching manner with the sliding rail structure on the inner surface of the explosion-proof cavity 20, so as to realize the movable fixing function of the light source 200 in the explosion-proof cavity 20.
Fig. 10 is an exploded view of the light-transmitting cavity structure of the present invention, as shown in fig. 10, in this embodiment, the light-transmitting cavity 30 includes a light-transmitting cavity housing 40, a lens fixing ring 50 and a focusing structure 60, the lens fixing ring 50 is disposed inside the light-transmitting cavity housing 40, the focusing structure 60 is slidably fixed on the light-transmitting cavity housing 40, and the lens fixing ring 50 and the focusing structure 60 are adaptively fixed and connected.
In this embodiment, the focusing structure 60 includes a focusing outer ring structure 61, a focusing inner ring structure 62 and a positioning pin 63, the focusing outer ring structure 61 is sleeved on the outside of the light-transmitting cavity housing 40, the focusing inner ring structure 62 is disposed inside the light-transmitting cavity 30, a guide groove penetrating through the inner surface and the outer surface of the light-transmitting cavity housing 40 is formed on the light-transmitting cavity housing 40, the positioning pin 63 penetrates through the guide groove, one end of the positioning pin 63 is fixedly connected with the inner surface of the focusing outer ring structure 61, and the other end of the positioning pin 63 is fixedly connected with the outer surface of the focusing inner ring structure 62. The focus inner ring structure 62 is fittingly fixedly connected with the lens fixing ring 50. In this embodiment, the guide groove is a chute.
The second lens 500 is fixed inside the light-transmitting cavity 30 through the lens fixing ring 50, the rotation of the focusing outer ring structure 61 is adjusted, the focusing outer ring structure 61 drives the focusing inner ring structure 61 to move through the positioning pin 63, further, the focusing inner ring structure 61 drives the second lens 500 in the lens fixing ring 50 to move, the position of the second lens 500 in the light-transmitting cavity 30 is changed, the distance between the second lens 500 and the first lens 300 is further adjusted, and the effect of adjusting the focal length of the light transmission structure 100 is achieved.
The utility model discloses a light transmission structure's theory of operation:
the light emitted by the laser source 200 is emitted from the light outlet, passes through the light inlet surface and the light outlet surface of the plano-concave lens 300, passes through the light inlet surface and the light outlet surface of the toughened glass 400, finally passes through the light inlet surface and the light outlet surface of the convex lens 500, and is emitted from the light outlet surface of the convex lens 500, so that the light source has high irradiation intensity, the condensation degree can reach 0.9, and the light source has the advantages of large light transmission structure, good heat dissipation performance, good explosion-proof performance, compact integral structure and the like.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, improvements, equivalents, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides an explosion-proof light transmission structure, its characterized in that includes light source (200), first lens (300) and second lens (500), light source (200) first lens (300) and second lens (500) are arranged the setting in proper order along the same optical axis, first lens (300) set up in the light-emitting side of light source (200), second lens (500) set up in the light-emitting side of first lens (300), the luminous half angle minimum of the light of second lens outgoing is 0.9.
2. An explosion-proof light transmission structure according to claim 1, characterized in that: the light source (200) is a laser light source, and the light-emitting half angle is 38-42 degrees.
3. An explosion-proof light transmission structure according to claim 1, characterized in that: the first lens (300) is a plano-concave lens, and the center thickness CT of the plano-concave lens (300) on the optical axis1The value satisfies: CT of 1.8mm or less1Less than or equal to 2.2 mm; the edge thickness ET of the plano-concave lens (300)1The value satisfies: ET not less than 8mm1Less than or equal to 9 mm; the outer diameter d of the plano-concave lens (300)1The value satisfies: d is not less than 48mm1≤52mm。
4. An explosion-proof light transmission structure according to claim 3, characterized in that: a gap T between the light inlet surface of the plano-concave lens (300) and the light outlet of the light source (200) along the optical axis01The value satisfies the conditional expression: t is01≤1mm。
5. An explosion-proof light transmission structure according to claim 1, characterized in that: the second lens (500) is a convex lens with a central thickness CT on the optical axis2The value satisfies: CT (computed tomography) of not less than 32mm2Less than or equal to 38 mm; edge thickness ET of the convex lens2The value satisfies: ET not less than 4mm2Less than or equal to 4.5 mm; outer diameter d of the convex lens2The value satisfies: d is more than or equal to 128mm2≤132mm。
6. An explosion-proof light transmitter according to claim 1Defeated structure, its characterized in that: the distance T between the light inlet surface of the first lens (300) and the center of the second lens (500) on the optical axis12The value satisfies: t is more than or equal to 103mm12≤110mm。
7. An explosion-proof light transmission structure according to claim 1, characterized in that: still include a toughened glass (400), toughened glass (400) set up in first lens (300) with between second lens (500), toughened glass (400) have into plain noodles and go out the plain noodles, the explosion-proof membrane has been plated respectively on the income plain noodles and the play plain noodles of toughened glass (400).
8. An explosion-proof light transmission structure according to claim 1, characterized in that: the lens fixing frame (600) is arranged below the first lens (300), and the first lens (300) is fixedly connected with the lens fixing frame (600).
9. An explosion-proof lamp, characterized in that, including explosion-proof chamber (20), printing opacity chamber (30) and explosion-proof light transmission structure (100) of any one of claims 1 ~ 8, explosion-proof chamber (20) with printing opacity chamber (30) fixed connection, light source (200) and first lens (300) are fixed to be set up in explosion-proof chamber (20), and second lens (500) are fixed to be set up in printing opacity chamber (30).
10. The explosion-proof lamp of claim 9, wherein: light-transmitting cavity (30) includes light-transmitting cavity shell (40), lens retainer plate (50) and focusing structure (60), lens retainer plate (50) set up the inside of light-transmitting cavity shell (40), focusing structure (60) slidable ground is fixed on light-transmitting cavity shell (40), lens retainer plate (50) with focusing structure (60) suitability ground fixed connection, second lens (500) pass through lens retainer plate (50) are fixed the inside of light-transmitting cavity (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120355206.1U CN214119934U (en) | 2021-02-09 | 2021-02-09 | Explosion-proof light transmission structure and explosion-proof lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120355206.1U CN214119934U (en) | 2021-02-09 | 2021-02-09 | Explosion-proof light transmission structure and explosion-proof lamp |
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| CN214119934U true CN214119934U (en) | 2021-09-03 |
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- 2021-02-09 CN CN202120355206.1U patent/CN214119934U/en active Active
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