CN215570286U - Connecting piece, explosion-proof shell assembly and explosion-proof lamp - Google Patents
Connecting piece, explosion-proof shell assembly and explosion-proof lamp Download PDFInfo
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- CN215570286U CN215570286U CN202120571776.4U CN202120571776U CN215570286U CN 215570286 U CN215570286 U CN 215570286U CN 202120571776 U CN202120571776 U CN 202120571776U CN 215570286 U CN215570286 U CN 215570286U
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- power supply
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Abstract
The utility model discloses a connecting piece, an explosion-proof shell assembly and an explosion-proof lamp, wherein the connecting piece comprises a conductive electric core and an insulating sleeve member, the conductive electric core is provided with a first electric connection end and a second electric connection end, the first electric connection end is used for being installed in a power supply cavity, and the second electric connection end is used for being installed in a light source cavity; the outside that is fixed in electrically conductive electric core is established to insulating external member cover, and the outer wall of insulating external member has the screw thread to be used for with explosion-proof casing threaded connection. The insulating sleeve is in threaded connection with the explosion-proof shell, so that the conductive cell is in sealed connection with the explosion-proof shell, and the light source cavity and the power supply cavity are independent cavities; therefore, no pressure superposition is caused between the power supply cavity and the light source cavity during explosion-proof (gas explosion) test. And moreover, the insulating sleeve is in threaded connection with the explosion-proof shell, so that the connecting piece is convenient to mount, the explosion-proof shell assembly is convenient to manufacture, and the explosion-proof shell assembly is suitable for manufacturing explosion-proof lamps in a large batch.
Description
Technical Field
The utility model relates to the technical field of explosion-proof lamps, in particular to a connecting piece, an explosion-proof shell assembly and an explosion-proof lamp.
Background
In the related technology, in the manufacturing process of the explosion-proof lamp, the explosion-proof shell is limited with a light source cavity and a power source cavity, a lead penetrates between the power source cavity and the light source cavity, and packaging glue is used for packaging a connecting position between the lead and the explosion-proof shell, so that the light source cavity and the power source cavity are independent cavities; therefore, when an explosion-proof (gas explosion) test is carried out, pressure superposition cannot be caused between the power supply cavity and the light source cavity. However, in actual production, when the lead is packaged by using the packaging adhesive, the next process is continued after the packaging adhesive is dried, so that when explosion-proof lamps are produced in a large scale, a large area is occupied for placing the explosion-proof lamps, and a large number of turnover tools are needed for placing semi-finished products, which is troublesome; meanwhile, the explosion-proof lamp has higher requirements on the quality of the packaging adhesive and the packaging process.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a connecting piece which can reduce the manufacturing difficulty of an explosion-proof lamp.
The utility model also provides an explosion-proof shell assembly with the connecting piece.
The utility model further provides an explosion-proof lamp with the explosion-proof shell assembly.
A connector according to an embodiment of the present invention is used for an explosion-proof housing having a light source cavity and a power supply cavity, including:
the conductive battery cell is provided with a first electric connection end and a second electric connection end, the first electric connection end is used for being positioned in the power supply cavity, and the second electric connection end is used for being positioned in the light source cavity;
and the insulating sleeve is sleeved and fixed on the outer side of the conductive battery cell, and the outer wall of the insulating sleeve is provided with threads so as to be connected with the explosion-proof shell in a threaded manner.
The connecting piece provided by the embodiment of the utility model has at least the following beneficial effects: when the explosion-proof lamp is manufactured, the insulating sleeve is connected to the explosion-proof shell in a threaded mode, the first electric connection end of the conductive electric core is located in the power supply cavity, the second electric connection end of the conductive electric core is located in the light source cavity, a power supply in the power supply cavity can be electrically connected with the first electric connection end, and the light source plate in the light source cavity can be electrically connected with the second electric connection end, so that the conductive electric core achieves the electric connection of the power supply and the light source plate; meanwhile, the insulation sleeve and the explosion-proof shell are connected in a sealing mode through threads, so that the light source cavity and the power supply cavity can be independent from each other, pressure superposition of the light source cavity and the power supply cavity during explosion-proof (gas explosion) testing is avoided, the installation process can be simplified, and the explosion-proof lamp is suitable for manufacturing explosion-proof lamps in large batches.
According to some embodiments of the utility model, the effective thread of the outer wall of the insulation sleeve is between 7 and 13 turns.
According to some embodiments of the utility model, the insulation kit comprises: the plastic sleeve is sleeved and fixed on the outer side of the conductive electric core; the metal sleeve is sleeved and fixed on the outer side of the plastic sleeve, and the outer wall of the metal sleeve is provided with threads so as to be connected with the explosion-proof shell in a threaded mode.
According to some embodiments of the utility model, the circumferential surface of the conductive cell is in snap connection with the inner circumferential surface of the plastic sleeve.
According to some embodiments of the utility model, the outer circumferential surface of the plastic sleeve is in snap connection with the inner circumferential surface of the metal sleeve.
According to some embodiments of the utility model, one end of the metal sleeve is provided with an annular flange which is flared outwards and is used for abutting against the inner wall of the explosion-proof shell.
According to some embodiments of the utility model, the first electrical connection end and the second electrical connection end are each provided with a threaded groove, and a fastening screw for fixing a wire is threadedly connected to the threaded groove.
An explosion proof housing assembly according to an embodiment of the present invention includes: comprises the connecting piece; the explosion-proof shell is limited with a power supply cavity and a light source cavity, wherein the insulation sleeve is in threaded connection with the explosion-proof shell, the first electric connection end is located in the power supply cavity, and the second electric connection end is located in the light source cavity.
The explosion-proof shell assembly provided by the embodiment of the utility model has at least the following beneficial effects: the explosion-proof shell assembly adopts the connecting piece, and the insulating sleeve is in threaded connection with the explosion-proof shell, so that the conductive cell is in sealed connection with the explosion-proof shell, and the light source cavity and the power supply cavity are independent cavities; therefore, no pressure superposition is caused between the power supply cavity and the light source cavity during explosion-proof (gas explosion) test. And moreover, the insulating sleeve is in threaded connection with the explosion-proof shell, so that the connecting piece is convenient to mount, the explosion-proof shell assembly is convenient to manufacture, and the explosion-proof shell assembly is suitable for manufacturing explosion-proof lamps in a large batch.
According to some embodiments of the utility model, the explosion proof housing comprises: a first housing defining a power supply cavity; a second housing defining a light source cavity; wherein the insulation kit is threadedly connected to the first housing and/or the second housing.
The explosion-proof lamp provided by the embodiment of the utility model comprises the explosion-proof shell assembly.
The explosion-proof lamp provided by the embodiment of the utility model at least has the following beneficial effects: the explosion-proof lamp adopts the explosion-proof shell assembly, the explosion-proof shell assembly adopts the connecting piece, and the insulating sleeve is in threaded connection with the explosion-proof shell, so that the conductive cell is in sealed connection with the explosion-proof shell, and the light source cavity and the power supply cavity are independent cavities; therefore, no pressure superposition is caused between the light source cavity and the power supply cavity during explosion-proof (gas explosion) test. And moreover, the insulating sleeve is in threaded connection with the explosion-proof shell, so that the connecting piece is convenient to mount, the explosion-proof shell assembly is convenient to manufacture, and the explosion-proof shell assembly is suitable for manufacturing explosion-proof lamps in a large batch.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The utility model is further described with reference to the following figures and examples, in which:
fig. 1 is a schematic overall structure diagram of a connecting member in an explosion-proof lamp according to an embodiment of the utility model;
FIG. 2 is a schematic diagram of an exploded view of a connector according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1;
fig. 5 is a schematic view of an explosion structure of an explosion-proof lamp according to an embodiment of the utility model.
Reference numerals:
an explosion-proof case 100, a first case 110, a connection part 111, a second case 120, a connection ring 121;
the connecting piece 200, the conductive battery cell 210, the first electrical connection end 211, the second electrical connection end 212, the threaded groove 213, the fastening screw 214, the first annular cavity 215, the insulating sleeve 220, the plastic sleeve 221, the annular protrusion 2211, the second annular cavity 2212, the metal sleeve 222, the annular flange 2221, the annular groove 2222 and the elastic sealing ring 230.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the orientation description is referred to merely for convenience in describing the utility model and for simplicity in description, and it is not intended to indicate or imply that the apparatus or component in question must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the utility model.
In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present numbers, and the above, below, within, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
According to the utility model, a connecting piece is disclosed, referring to fig. 1 and 2, the connecting piece 200 is used for an explosion-proof housing 100 (referring to fig. 5), the explosion-proof housing 100 is provided with a light source cavity and a power supply cavity; the connecting piece 200 comprises a conductive cell 210 and an insulating kit 220, wherein the conductive cell 210 is provided with a first electric connection end 211 and a second electric connection end 212, the first electric connection end 211 is located in the power supply cavity, and the second electric connection end 212 is located in the light source cavity; the insulating sleeve 220 is fixed on the outer side of the conductive electric core 210 in a sleeving manner, and the outer wall of the insulating sleeve 220 is provided with threads for being in threaded connection with the explosion-proof shell 100.
Specifically, when the explosion-proof lamp is manufactured, the insulating sleeve 220 is connected to the explosion-proof housing 100 in a threaded manner, the first electric connection end 211 of the conductive cell 210 is located in the power supply cavity, the second electric connection end 212 of the conductive cell 210 is located in the light source cavity, a power supply in the power supply cavity can be electrically connected to the first electric connection end 211, and a light source plate in the light source cavity can be electrically connected to the second electric connection end 212, so that the conductive cell 210 realizes the electric connection between the power supply and the light source plate; meanwhile, the insulating sleeve 220 is in threaded connection with the explosion-proof housing 100, so that the conductive cell 210 is in sealed connection with the explosion-proof housing 100, and thus the light source cavity and the power supply cavity are independent cavities; therefore, no pressure superposition is caused between the light source cavity and the power supply cavity during explosion-proof (gas explosion) test. Moreover, the insulating sleeve 220 is in threaded connection with the explosion-proof housing 100, so that the connecting piece 200 is convenient to mount, the explosion-proof housing 100 is convenient to manufacture, and the explosion-proof housing is suitable for manufacturing explosion-proof lamps in a large batch.
In some embodiments, the insulating sleeve 220 includes a plastic sleeve 221 and a metal sleeve 222, where the plastic sleeve 221 is a circular tubular body, and the plastic sleeve 221 is sleeved and fixed on the outer side of the conductive core 210. The metal sleeve 222 is a circular tubular body, the metal sleeve 222 is sleeved and fixed on the outer side of the plastic sleeve 221, the outer wall of the metal sleeve 222 is provided with external threads, and the external threads are in threaded connection with the explosion-proof shell 100, so that the metal sleeve 222 is in threaded connection with the explosion-proof shell 100, so that the conductive battery cell 210 is hermetically connected with the explosion-proof shell 100.
Specifically, the insulating sleeve 220 adopts the above structure, and in the first place, the metal sleeve 222 is made of metal material, so that the strength of the metal piece is relatively high, thereby meeting the strength requirement of the explosion-proof lamp on the explosion-proof housing 100 and avoiding the problems of fire and the like caused by the splashing of sparks at the inner side of the explosion-proof housing 100. Meanwhile, through the arrangement of the plastic sleeve 221, the conductive battery cell 210 is prevented from transmitting electricity to the outer sides of the explosion-proof housing 100 and the metal sleeve 222. In addition, when the connecting member 200 is manufactured, since the conductive cell 210 and the metal sleeve 222 are made of metal materials, the melting point of the conductive cell 210 and the metal sleeve 222 is large, and the melting point of the plastic sleeve 221 is small, so that liquid plastic can be injected between the conductive cell 210 and the metal sleeve 222 to form the plastic sleeve 221, and thus the plastic sleeve 221 can be connected with the conductive cell 210 and the metal sleeve 222 in a better sealing manner.
In some embodiments, the effective threading of the outer wall of insulation sleeve 220 is between 7 and 13 turns. Specifically, the effective thread is within the above range, and the connection strength and the sealing property between the insulating sleeve 220 and the explosion-proof housing 100 are good; in addition, the effective threads are within the range, so that excessive effective threads are avoided, the manufacturing difficulty of the explosion-proof shell 100 is improved, and the waste of materials is caused.
In some embodiments, referring to fig. 2 and 3, in order to further improve the connection strength between the plastic sheath 221 and the conductive cell 210, the circumferential surface of the conductive cell 210 is in snap-fit connection with the inner circumferential surface of the plastic sheath 221, so as to prevent the plastic sheath 221 from being separated from the end of the conductive cell 210.
Specifically, a first annular cavity 215 is formed in the circumferential surface of the conductive battery cell 210, an annular protrusion 2211 is formed in the inner wall of the plastic sleeve 221, and the annular protrusion 2211 is embedded in the first annular cavity 215, so that the conductive battery cell 210 is connected with the plastic sleeve 221 in a clamping manner, the plastic sleeve 221 is prevented from being separated from the end portion of the conductive battery cell 210, and the plastic sleeve 221 is fastened and connected.
Further, a gear is integrally arranged on the circumferential surface of the end portion of the conductive cell 210 along the length direction of the conductive cell 210, a tooth groove is formed on the inner wall of the plastic sleeve 221, and the gear is embedded in the tooth groove, so that circumferential fixation of the plastic sleeve 221 and the conductive cell 210 is realized, and further circumferential fixation of the plastic sleeve 221 and the conductive cell 210 is realized.
In some embodiments, in order to further improve the connection strength between the plastic sleeve 221 and the metal sleeve 222, the inner circumferential surface of the metal sleeve 222 is in snap connection with the outer circumferential surface of the plastic sleeve 221, so that the metal sleeve 222 is prevented from being separated from the end of the plastic sleeve 221, and the plastic sleeve 221 is more stably connected with the conductive cell 210.
Specifically, the outer peripheral surface of the plastic sleeve 221 is provided with a second annular cavity 2212, the inner wall of the second annular cavity 2212 is sleeved with the metal sleeve 222, one end surface of the metal sleeve 222 abuts against one end surface of the second annular cavity 2212, and the other end surface of the metal sleeve 222 abuts against the other end surface of the second annular cavity 2212, so that the metal sleeve 222 and the plastic sleeve 221 are connected in a clamped manner, the metal sleeve 222 is prevented from being separated from the end portion of the plastic sleeve 221, and the metal sleeve 222 is fastened and connected.
Further, a strip-shaped protrusion (refer to fig. 4) is formed on the bottom surface of the second annular cavity 2212 along the length direction thereof, a strip-shaped groove is formed on the inner circumferential surface of the metal sleeve 222, and the strip-shaped protrusion is embedded in the strip-shaped groove, so that circumferential fixation between the metal sleeve 222 and the plastic sleeve 221 is realized, and further, the connection between the metal sleeve 222 and the plastic sleeve 221 is more stable.
In some embodiments, in order to rotate the metal sleeve 222 to a position required by the explosion-proof housing 100, one end of the metal sleeve 222 is provided with an annular flange 2221 which is flared outwards, so that when the connecting member 200 is installed, the annular flange 2221 abuts against the inner wall of the explosion-proof housing 100, thereby realizing accurate installation of the metal sleeve 222.
In some embodiments, in order to facilitate the electrical connection between the wire of the power supply cavity and the first electrical connection end 211, a threaded groove 213 is formed in an end surface of the first electrical connection end 211 along a length direction of the conductive cell 210, the threaded groove 213 is in threaded connection with a fastening screw 214, and the fastening screw 214 fastens the wire on the first connection end 211, so that the wire is electrically connected to the conductive cell 210; similarly, in order to facilitate the electrical connection between the wire of the light source cavity and the second electrical connection end 212, a thread groove 213 is formed in the end surface of the second electrical connection end 212 along the length direction of the conductive electrical core 210, the thread groove 213 is connected with a fastening screw 214 in a threaded manner, and the fastening screw 214 fastens the wire on the second electrical connection end 212, so that the wire is electrically connected with the conductive electrical core 210.
In some embodiments, in order to improve the sealing performance between the metal sleeve 222 and the explosion-proof housing 100, an annular groove 2222 is formed in the outer circumferential surface of the metal sleeve 222, an elastic sealing ring 230 is embedded in the annular groove 2222, and the elastic sealing ring 230 abuts against the inner wall of the threaded hole of the explosion-proof housing 100, so that the sealing performance between the metal sleeve 222 and the explosion-proof housing is improved.
According to the utility model, referring to fig. 2 and 5, the explosion-proof housing 100 comprises the connecting piece 200 and the explosion-proof housing 100, the explosion-proof housing 100 defines a power supply cavity and a light source cavity, wherein the metal sleeve 222 is screwed to the explosion-proof housing 100, so that the first electric connection end 211 is positioned in the power supply cavity, and the second electric connection end 212 is positioned in the light source cavity.
Specifically, the explosion-proof housing assembly adopts the connecting piece 200, and the insulating sleeve 220 is in threaded connection with the explosion-proof housing 100, so that the conductive cell 210 is hermetically connected with the explosion-proof housing 100, and thus the light source cavity and the power supply cavity are independent cavities; therefore, no pressure superposition is caused between the light source cavity and the power supply cavity during explosion-proof (gas explosion) test. Moreover, the insulating sleeve 220 is in threaded connection with the explosion-proof housing 100, so that the connecting piece 200 is convenient to mount, the explosion-proof housing 100 is convenient to manufacture, and the explosion-proof housing is suitable for manufacturing explosion-proof lamps in a large batch.
In addition, the first electrical connection end 211 of the conductive cell 210 is located in a power supply cavity, and a power supply in the power supply cavity can be conveniently and electrically connected with the conductive cell 210; similarly, the second electrical connection end 212 of the conductive electrical core 210 extends into the light source cavity, and the light source board in the light source cavity can be conveniently electrically connected with the conductive electrical core 210.
In some embodiments, the explosion-proof housing 100 includes a first housing 110 and a second housing 120, the first housing 110 being used to form a power supply cavity for installation of a power supply; meanwhile, the second housing 120 is used to form a light source cavity for installation of a light source board.
One end of the metal sleeve 222 is screwed to the first casing 110, so that one end of the conductive cell 210 is located in the power supply cavity, and the other end of the metal sleeve 222 is screwed to the second casing 120, so that the other end of the conductive cell 210 is located in the power supply cavity (not shown in the figure). Instead, the outer wall of the first housing 110 is a connection portion 111 protruding outward, the outer circumferential surface of the connection portion 111 is threaded, the outer wall of the second housing 120 is integrally provided with a connection ring 121, a through hole inside the connection ring 121 is communicated with the light source cavity, and the connection portion 111 is threaded with the connection ring 121, thereby achieving the fixed connection of the first housing 110 and the second housing 120. Meanwhile, the metal sleeve 222 is screwed to the connection portion 111, the first electrical connection end 211 can be located in the power supply cavity to enable electrical connection with a power supply, and the second electrical connection end 212 can be located in the connection ring 121 to enable electrical connection with the light source board.
According to the utility model, the explosion-proof lamp comprises the explosion-proof shell 100, the explosion-proof lamp adopts the explosion-proof shell assembly, the explosion-proof shell assembly adopts the connecting piece 200, and the insulating sleeve 220 is in threaded connection with the explosion-proof shell 100, so that the conductive cell 210 is in sealed connection with the explosion-proof shell 100, and a light source cavity and a power supply cavity are independent cavities; therefore, no pressure superposition is caused between the light source cavity and the power supply cavity during explosion-proof (gas explosion) test. Moreover, the insulating sleeve 220 is in threaded connection with the explosion-proof housing 100, so that the connecting piece 200 is convenient to mount, the explosion-proof housing 100 is convenient to manufacture, and the explosion-proof housing is suitable for manufacturing explosion-proof lamps in a large batch.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (10)
1. The connecting piece for explosion-proof casing, explosion-proof casing has light source chamber and power supply chamber, its characterized in that includes:
the conductive battery cell is provided with a first electric connection end and a second electric connection end, the first electric connection end is used for being installed in the power supply cavity, and the second electric connection end is used for being installed in the light source cavity;
the insulating external member, the cover is established and is fixed in the outside of electrically conductive electric core, the outer wall of insulating external member have the screw thread, in order be used for with explosion-proof casing threaded connection separates in order to seal the light source chamber with the power supply chamber.
2. The connector of claim 1, wherein the threads of the outer wall of the insulation sleeve are between 7 and 13 turns.
3. The connector of claim 1, wherein the insulation pack comprises:
a plastic sheath;
the metal sleeve is sleeved and fixed on the outer side of the plastic sleeve, and the outer wall of the metal sleeve is provided with the threads so as to be connected with the explosion-proof shell in a threaded mode.
4. The connecting piece of claim 3, wherein the peripheral surface of the conductive cell is in snap-fit connection with the inner peripheral surface of the plastic sleeve.
5. A connector according to claim 3, wherein the outer circumferential surface of the plastic sleeve is snap-fitted to the inner circumferential surface of the metal sleeve.
6. A connecting piece according to claim 3, wherein one end of the metal sleeve is provided with an outwardly flared annular flange for abutting against the inner wall of the explosion proof housing.
7. The connector according to claim 1, wherein the first electrical connection end and the second electrical connection end are each formed with a threaded groove to which a fastening screw for fixing a wire is threadedly connected.
8. An explosion proof housing assembly, comprising:
comprising a connector according to any one of claims 1 to 7;
the explosion-proof shell is limited with a power supply cavity and a light source cavity, wherein the insulation sleeve is in threaded connection with the explosion-proof shell, the first electric connection end is located in the power supply cavity, and the second electric connection end is located in the light source cavity.
9. The explosion proof housing assembly of claim 8 wherein said explosion proof housing comprises:
a first housing defining a power supply cavity;
a second housing defining a light source cavity;
wherein the insulation kit is threadedly connected to the first housing and/or the second housing.
10. An explosion proof lamp comprising the explosion proof housing assembly of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120571776.4U CN215570286U (en) | 2021-03-19 | 2021-03-19 | Connecting piece, explosion-proof shell assembly and explosion-proof lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120571776.4U CN215570286U (en) | 2021-03-19 | 2021-03-19 | Connecting piece, explosion-proof shell assembly and explosion-proof lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215570286U true CN215570286U (en) | 2022-01-18 |
Family
ID=79854441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120571776.4U Active CN215570286U (en) | 2021-03-19 | 2021-03-19 | Connecting piece, explosion-proof shell assembly and explosion-proof lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215570286U (en) |
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2021
- 2021-03-19 CN CN202120571776.4U patent/CN215570286U/en active Active
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