CN107562000B - Mining communication equipment - Google Patents
Mining communication equipment Download PDFInfo
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- CN107562000B CN107562000B CN201710911660.9A CN201710911660A CN107562000B CN 107562000 B CN107562000 B CN 107562000B CN 201710911660 A CN201710911660 A CN 201710911660A CN 107562000 B CN107562000 B CN 107562000B
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- cavity
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- 238000004891 communication Methods 0.000 title claims abstract description 48
- 238000005065 mining Methods 0.000 title claims abstract description 21
- 230000007246 mechanism Effects 0.000 claims abstract description 55
- 238000007789 sealing Methods 0.000 claims description 15
- 239000000428 dust Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 4
- 239000003245 coal Substances 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000001960 triggered effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- -1 mines Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Lock And Its Accessories (AREA)
- Telephone Set Structure (AREA)
Abstract
The invention provides mining communication equipment, which comprises a communication module (110), and is characterized by further comprising: a latch control module (120) coupled to the communication module (110); the lockout control module (120) includes: a housing (121), an upper cover (122), and a push button latch mechanism (123) located in a cavity defined by the housing (121) and the upper cover (122), and a pull wire latch mechanism (124) in contact with the push button latch mechanism (123); the locking control module (120) is used for controlling the locking of the belt conveying equipment based on user operation. The communication equipment is used for simultaneously realizing the related functions of voice communication and the locking control function of the belt conveyor equipment, so that the problems that the locking control equipment in the prior art is large in size and high in failure rate and cannot well meet the production requirements of coal mine enterprises are solved.
Description
Technical Field
The invention relates to the technical field of underground coal mine safety control, in particular to mining communication equipment.
Background
Along with the continuous development of science and technology, coal mine production automation has been widely used, and in the existing coal mine production mode, coal mined underground by a coal mine is transported to the ground or an underground coal bunker mainly by means of belt conveying equipment, and the conveying distance is long. When the belt conveyor fails, the belt conveyor needs to be scram and reliably locked, and at the same time, in order to facilitate communication by underground personnel, it is necessary to implement voice communication. It follows that control of the belt conveyor is critical to improving production efficiency.
However, in the related art, the locking control device has a large volume, is inconvenient to use, and has a high failure rate, so that the locking control device in the related art cannot well meet the production requirements of coal mine enterprises.
Disclosure of Invention
The embodiment of the invention provides mining communication equipment which is used for simultaneously realizing a voice call related function and a locking control function of belt conveying equipment, so that the problems that the locking control equipment in the prior art is large in size and high in failure rate, and cannot well meet the production requirements of coal mine enterprises are solved.
The embodiment of the invention provides mining communication equipment, which comprises the following components: the communication module 110 further includes: a latch control module 120 connected to the communication module 110;
the latch control module 120 includes: a housing 121, an upper cover 122, a button locking mechanism 123 located in a cavity defined by the housing 121 and the upper cover 122, and a pull wire locking mechanism 124 in contact with the button locking mechanism 123;
the locking control module 120 is used for locking the belt conveying equipment based on user operation.
Optionally, the communication module 110 includes: a main casing 111, a main upper cover 112, a voice call control circuit board 113, a microphone 114, a dotting button mechanism 115, a talk button mechanism 116, a speaker 117, a glue sealed battery pack 118, and a waterproof joint 119, which are located in a cavity enclosed by the main casing 111 and the main upper cover 112;
wherein the voice call control circuit board 113, the microphone 114, the speaker 117, and the gel-sealed battery pack 118 are mounted on the main housing 111 by screws 1110, respectively;
the waterproof joints 119 are installed at both sides of the main housing 111 for the access of cables;
the talk button mechanism 116 includes: a button bracket 1161, a button cap 1162, a gasket 1163, a return spring 1164, a screw 1165, and a telephone transmitter electrical button 1166;
wherein the button bracket 1161 and the sealing pad 1163 are disposed on the main upper cover 112 through the screw 1165, and form a cavity;
the button cap 1162 and the return spring 1164 are disposed in the cavity;
the talk about electric button 1166 is located on the button bracket 1161;
the dotting button mechanism 115 includes: a button bracket 1151, a button cap 1152, a gasket 1153, a return spring 1154, a screw 1155, and a dotting electrical button 1156;
wherein the button bracket 1151 and the gasket 1153 are disposed on the main upper cover 112 by the screw 1155, and form a cavity;
the button cap 1152 and the return spring 1154 are disposed in the cavity;
the dotting electrical button 1156 is located on the button support 1151.
Optionally, the button locking mechanism 123 includes: a lock button block 12301, a lock button 12302, a limit lever 12305, a plectrum holder 12306, a plectrum 12307, and a travel electric switch 12310;
wherein the locking button base 12301 is located on the upper cover 122, and the locking button base 12301 has a jack;
the locking button 12302 is installed on the locking button seat 12301 through the insertion hole, and the locking button seat 12301 is connected with the limiting rod 12305 through a screw 12311;
the plectrum frame 12306 is arranged on the locking button seat 12301, the plectrum 12307 is arranged on the plectrum frame 12306 through a pin roll 12312, and the plectrum 12307 rotates by taking the pin roll 12312 as a fulcrum;
the travel electric switch 12310 is disposed on the locking button base 12301.
Optionally, the button locking mechanism 123 further includes: ball 12303, first spring 12304;
wherein one end of the first spring 12304 is in contact with the ball 12303;
the ball bearing 12303 is located on the latch button mount 12301, and the ball bearing 12303 contacts a dimple on the latch button 12302.
Optionally, the button locking mechanism 123 further includes: rubber dust cap 12308, seal 12309;
wherein the rubber dust cap 12308 is disposed on a side wall of the lock button 12302;
the sealing ring 12309 is positioned at a position where the locking button 12302 contacts the locking button base 12301.
Optionally, the pull wire locking mechanism 124 includes: pull rod 12401, pull rod mount 12402, end cap 12404;
wherein the pull rod seat 12402 is disposed on the housing 121;
the end cap 12404 is disposed on the pull rod seat 12402, the pull rod seat 12402 and the end cap 12404 form a cavity, and one end of the pull rod 12401 is disposed in the cavity;
and the pull rod 12401 contacts with the pulling piece 12307, and when the pull rod 12401 moves, the pulling piece 12307 is driven to rotate by a set angle with the pin shaft 12312 as a pivot.
Optionally, the pull wire locking mechanism 124 further includes: the second spring 12403 is disposed in the cavity and contacts the pull rod 12401, and the second spring 12403 is used for resetting the pull rod 12401 when the pull rod 12401 is not stressed.
Optionally, the pull wire locking mechanism 124 further includes: limit seat 12407;
the limiting seat 12407 is disposed on the housing 121, and the limiting seat 12407 is used for controlling the axial movement range of the pull rod 12401.
Optionally, a connector 12405 is connected to the other end of the pull rod 12401.
Optionally, the pull wire locking mechanism 124 further includes: seal ring 12406;
the seal ring 12406 is disposed at a position where the pull rod seat 12402 contacts the end cap 12404.
As can be seen from the above embodiments, the mining communication device provided by the present invention not only includes a communication module, but also includes a locking control module, where the locking control module is configured to perform locking control on the belt conveyor device based on user operation, so as to implement a voice call related function and a locking control function on the belt conveyor device at the same time, thereby solving the problems in the prior art that the locking control device has a large volume and a high failure rate, and cannot well meet the production requirements of coal mine enterprises.
Drawings
Fig. 1 is a component structure diagram of a mining communication device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a communication module included in the mining communication device according to the present invention;
fig. 3 is a schematic structural diagram of a latch control module included in the mining communication device provided by the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly described below with reference to the drawings and the embodiments of the present invention.
Referring to fig. 1, a structure diagram of a mining communication device according to an embodiment of the present invention is shown.
The mining communication device as illustrated in fig. 1 includes a latch control module 120 in addition to a communication module 110, and the latch control module 120 is connected to the communication module 110 by a screw 130.
In a preferred implementation, a sealing rubber gasket 140 may be provided at the location where the communication module 110 and the latch control module 120 are connected to enhance the waterproof and dustproof properties of the mining communication device.
In the present invention, the locking control module 120 may include a housing, an upper cover, a button locking mechanism located in a cavity defined by the housing and the upper cover, and a wire locking mechanism contacting with the button locking mechanism, and the detailed structure of the locking control module 120 may be referred to as an embodiment shown in fig. 3 below, which will not be described in detail herein.
In the present invention, the above-described lock control module 120 may be used to perform lock control of the belt conveyor based on a user operation.
As can be seen from the above embodiments, the mining communication device provided by the present invention not only includes a communication module, but also includes a locking control module, where the locking control module is configured to perform locking control on the belt conveyor device based on user operation, so as to implement a voice call related function and a locking control function on the belt conveyor device at the same time, thereby solving the problems in the prior art that the locking control device has a large volume and a high failure rate, and cannot well meet the production requirements of coal mine enterprises.
As follows, the communication module 110 illustrated in fig. 1 will be first described by the following embodiment.
Embodiment one:
fig. 2 is a schematic structural diagram of a communication module included in the mining communication device according to the present invention.
As shown in fig. 2, the communication module 110 may include: a main housing 111, a main upper cover 112, a voice call control circuit board 113, a microphone 114, a dotting button mechanism 115, a talk button mechanism 116, a speaker 117, a glue sealed battery pack 118 and a waterproof connector 119 which are positioned in a cavity enclosed by the main housing 111 and the main upper cover 112.
In one embodiment, the main housing 111 may be welded from a steel plate and may be machined with a mounting screw hole to be connected with other components.
In one embodiment, the voice call control circuit board 113, the microphone 114, the speaker 117, and the rubber-sealed battery pack 118 may be mounted on the main housing 111 by screws 1110, respectively.
In one embodiment, the waterproof connectors 119 may be installed at both sides of the main housing 111 for cable access.
In one embodiment, the dotting button mechanism 115 may include: a button support 1151, a button cap 1152, a gasket 1153, a return spring 1154, a screw 1155, and a dotting electrical button 1156.
In one embodiment, the button bracket 1151 and the gasket 1153 may be fixed to the main upper cover 112 by screws 1155, respectively, and form a cavity; the button cap 1152 and return spring 1154 may be disposed within the cavity.
In one embodiment, the dotting electrical buttons 1156 described above may be mounted on a button support 1151.
Through the above described connection, the above described dotting button mechanism 115 operates on the principle that the user can deform the sealing pad 1153 by pressing the sealing pad 1153, thereby pushing the button cap 1152 to move axially, and during the movement, the button cap 1152 can trigger the dotting electric button 1156 to move; subsequently, when the gasket 1153 is no longer stressed, the button cap 1152 may be reset by the return spring 1154, which in turn may cause the electrical button 1156 to also reset.
In one embodiment, the talk button mechanism 116 may include: a button bracket 1161, a button cap 1162, a gasket 1163, a return spring 1164, a screw 1165, and a telephone transmitter electrical button 1166.
In one embodiment, the button bracket 1161 and the sealing pad 1163 may be fixed to the main upper cover 112 by screws 1165, respectively, and form a cavity; the button cap 1162 and the return spring 1164 described above may be disposed within the cavity.
In one embodiment, the telephony electrical button 1166 may be mounted on a button support 1161.
Through the above-described connection relationship, the working principle of the above-described speech transmission button mechanism 116 is that the user presses the sealing pad 1163 to deform the sealing pad, so as to push the button cap 1162 to axially move, and the button cap 1162 can trigger the speech transmission electric button 1166 to move during the axial movement; subsequently, when the gasket 1163 is no longer stressed, the button cap 1162 may be reset by the return spring 1164, thereby resetting the telephone transmitter electrical button 1166.
Thus, the description of the first embodiment is completed.
Next, the latch control module 120 illustrated in fig. 1 will be described by the following second embodiment.
Embodiment two:
fig. 3 is a schematic structural diagram of a locking control module included in the mining communication device according to the present invention.
The latch control module 120 as shown in fig. 3 includes: the housing 121, the upper cover 122, and the push button latch 123 located in a cavity defined by the housing 121 and the upper cover 122, and the pull wire latch 124 in contact with the push button latch 123.
The button lock mechanism 123 is first described as follows:
the button locking mechanism 123 may include: a lock button seat 12301, a lock button 12302, a limit lever 12305, a plectrum frame 12306, a plectrum 12307, and a travel electric switch 12310.
In one embodiment, a latch button block 12301 may be mounted on the latch upper cover 122, and a latch button 12302 may be inserted into the latch button block 12301 through a socket on the latch button block 12301 and coupled to a stop rod 12305 by a screw 12311.
In an embodiment, the paddle holder 12306 may be mounted on the latch button base 12301, and the paddle 12307 is mounted on the paddle holder 12306 by the pin 12312, and the paddle 12307 may rotate about the pin 12312.
In one embodiment, the travel electrical switch 12310 may be disposed on the lockout button mount 12301.
Further, the button locking mechanism 123 may further include: ball 12303, first spring 12304.
In an embodiment, the ball 12303 and the first spring 12304 may be mounted on the latch button mount 12301, the ball 12303 may be disposed on the latch button mount 12301, and the ball 12303 contacts a recess on the latch button 12302 such that the latch button 12302 can be fixed in position in an axial direction.
In one embodiment, one end of the first spring 12304 is in contact with the ball 12303.
Further, the button locking mechanism 123 may further include: rubber dust cover 12308, sealing washer 12309.
In one embodiment, a rubber dust cap 12308 may be provided on the side wall of the latch button 12302; the sealing ring 12309 can be disposed at a position where the locking button 12302 contacts the locking button seat 12301, so as to realize a dustproof and waterproof function of the button locking mechanism.
Through the above-described connection relationship, the button locking mechanism 123 operates on the principle that when the locking button 12302 moves up and down, the travel electric switch 12310 on the locking button base 12301 is triggered to move; meanwhile, the limiting rod 12305 connected with the locking button 12302 can also move up and down, so that the pulling piece 12307 is pushed to rotate by taking the pin roll 12312 as a fulcrum.
So far, the description of the button lockout mechanism 123 is completed.
The wire locking mechanism 124 is described as follows:
the pull wire latching mechanism 124 may include: a drawbar 12041, a drawbar socket 12042, and an end cap 12404.
In one embodiment, the drawbar mount 12402 can be disposed on the housing 121.
In one embodiment, the end cap 12404 can be disposed on the drawbar holder 12402, and the drawbar holder 12402 and the end cap 12404 form a cavity in which one end of the drawbar 12401 can be disposed.
In an embodiment, the pull rod 12401 contacts the pulling piece 12307, so that the pulling piece 12307 can be driven to rotate by a set angle with the pin 12312 as a fulcrum when the pull rod 12401 moves.
Further, the wire latching mechanism 124 may further include: and a second spring 12403.
In an embodiment, the second spring 12403 may be disposed in the cavity and in contact with the pull rod 12401, and through the second spring 12403, the pull rod 12401 may be reset when the pull rod 12401 is not stressed.
Further, the wire latching mechanism 124 may further include: limit seat 12407.
In an embodiment, a limiting seat 12407 may be provided on the housing 121, and through this limiting seat 12407, the axial movement range of the tie rod 12401 may be controlled.
Further, the wire latching mechanism 124 may further include: and a connection head 12405.
In one embodiment, connector 12405 is connected to the other end of pull rod 12401.
Further, the wire latching mechanism 124 may further include: seal 12406.
In an embodiment, the seal ring 12406 may be disposed at a position where the pull rod seat 12402 contacts the end cap 12404 to achieve the waterproof and dustproof functions.
Through the above-described connection relationship, the pull wire locking mechanism 124 operates on the principle that when the pull rod 12401 is axially displaced after being stressed, the pulling piece 12307 can be driven to rotate by a certain angle with the pin 12312 as a pivot, the pulling piece 12307 can push the limiting rod 12305 to move up and down, the limiting rod 12305 then drives the locking button 12302 to move up and down, and the travel electric switch 12310 can be triggered to move up and down when the locking button 12302 moves up and down. Subsequently, when the pull rod 12401 is not stressed any more, the second spring 12403 can be used for resetting; when the pulling piece 12307 is not stressed, the locking button 12302 is kept still under the action of the ball 12303 and the first spring 12304, so that the travel electric switch 12310 is still in a triggered state.
Thus, the description of the cord lock mechanism 124 is completed.
As can be seen from the first embodiment and the second embodiment, the present invention provides a mining communication device, which can realize functions of voice call, broadcasting, dotting, wire drawing scram, locking button scram, alarm, and the like, compared with the existing mining communication device, not only realizes functions related to voice call, but also realizes locking control functions for belt conveying equipment, thereby solving the problems that in the prior art, locking control equipment has larger volume and higher failure rate, and cannot well meet production requirements of coal mine enterprises; meanwhile, the mining communication equipment is suitable for environments with gas and coal dust explosion risks under coal mines, and is also suitable for severe environments such as metallurgy, building materials, mines, coal preparation plants, steel plants, thermal power plants, ports and the like, so that the mining communication equipment is very wide in application and can well meet user experience.
By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described herein in detail, many other variations or modifications of the invention consistent with the principles of the invention may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.
Claims (7)
1. A mining communication device comprising a communication module (110), characterized in that it further comprises: a latch control module (120) coupled to the communication module (110);
the lockout control module (120) includes: a housing (121), an upper cover (122), and a push button latch mechanism (123) located in a cavity defined by the housing (121) and the upper cover (122), and a pull wire latch mechanism (124) in contact with the push button latch mechanism (123);
wherein the locking control module (120) is used for locking the belt conveying equipment based on user operation;
the communication module (110) comprises: a main housing (111), a main upper cover (112), and a voice call control circuit board (113), a microphone (114), a dotting button mechanism (115), a talk button mechanism (116), a loudspeaker (117), a glue sealed battery pack (118), and a waterproof joint (119) which are positioned in a cavity enclosed by the main housing (111) and the main upper cover (112);
wherein the voice call control circuit board (113), the microphone (114), the loudspeaker (117) and the glue sealed battery pack (118) are respectively arranged on the main shell (111) through screws (1110);
the waterproof connectors (119) are arranged on two sides of the main shell (111) and are used for connecting cables;
the talk button mechanism (116) includes: a button bracket (1161), a button cap (1162), a sealing pad (1163), a return spring (1164), a screw (1165) and a telephone transmission electric button (1166);
wherein the button bracket (1161) and the sealing pad (1163) are arranged on the main upper cover (112) through the screw (1165) and form a cavity;
the button cap (1162) and the return spring (1164) are disposed in the cavity;
the telephone transmission electric button (1166) is positioned on the button bracket (1161);
the dotting button mechanism (115) includes: a button bracket (1151), a button cap (1152), a gasket (1153), a return spring (1154), a screw (1155), and a dotting electrical button (1156);
wherein the button bracket (1151) and the gasket (1153) are disposed on the main upper cover (112) by the screw (1155) and form a cavity;
the button cap (1152) and the return spring (1154) are disposed in the cavity;
the dotting electrical button (1156) is located on the button support (1151);
the button lock mechanism (123) includes: a locking button seat (12301), a locking button (12302), a limiting rod (12305), a plectrum frame (12306), a plectrum (12307) and a travel electric switch (12310);
wherein the locking button seat (12301) is positioned on the upper cover (122), and the locking button seat (12301) is provided with a jack;
the locking button (12302) passes through the jack and is arranged on the locking button seat (12301), and the locking button seat (12301) is connected with the limiting rod (12305) through a screw (12311);
the plectrum frame (12306) is arranged on the locking button seat (12301), the plectrum (12307) is arranged on the plectrum frame (12306) through a pin shaft (12312), and the plectrum (12307) rotates by taking the pin shaft (12312) as a fulcrum;
the travel electric switch (12310) is arranged on the locking button seat (12301);
the button lockout mechanism (123) further includes: a ball (12303), a first spring (12304);
wherein one end of the first spring (12304) is in contact with the ball (12303);
the ball (12303) is located on the latch button mount (12301), and the ball (12303) is in contact with a dimple on the latch button (12302).
2. The communication device according to claim 1, wherein the button latching mechanism (123) further comprises: a rubber dust cover (12308) and a sealing ring (12309);
wherein the rubber dust cap (12308) is provided on a side wall of the lock button (12302);
the sealing ring (12309) is positioned at a position where the locking button (12302) contacts the locking button base (12301).
3. The communication device of claim 1, wherein the wire latching mechanism (124) comprises: a pull rod (12401), a pull rod seat (12402) and an end cover (12404);
wherein the pull rod seat (12402) is arranged on the shell (121);
the end cover (12404) is arranged on the pull rod seat (12402), the pull rod seat (12402) and the end cover (12404) form a cavity, and one end of the pull rod (12401) is arranged in the cavity;
and the pull rod (12401) is contacted with the poking piece (12307), and the poking piece (12307) is driven to rotate for a set angle by taking the pin shaft (12312) as a fulcrum when the pull rod (12401) moves.
4. A communication device according to claim 3, wherein the wire latching mechanism (124) further comprises: a second spring (12403);
the second spring (12403) is disposed in the cavity and is in contact with the pull rod (12401), and the second spring (12403) is used for resetting the pull rod (12401) when the pull rod (12401) is not stressed.
5. The communication device of claim 4, wherein the wire latching mechanism (124) further comprises: a limit seat (12407);
the limiting seat (12407) is arranged on the shell (121), and the limiting seat (12407) is used for controlling the axial movement range of the pull rod (12401).
6. The communication device according to claim 5, wherein the other end of the pull rod (12401) is connected with a connector (12405).
7. The communication device of any of claims 3-6, wherein the wire latching mechanism (124) further comprises: a seal ring (12406);
the sealing ring (12406) is arranged at the position where the pull rod seat (12402) is contacted with the end cover (12404).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710911660.9A CN107562000B (en) | 2017-09-29 | 2017-09-29 | Mining communication equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710911660.9A CN107562000B (en) | 2017-09-29 | 2017-09-29 | Mining communication equipment |
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| Publication Number | Publication Date |
|---|---|
| CN107562000A CN107562000A (en) | 2018-01-09 |
| CN107562000B true CN107562000B (en) | 2023-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710911660.9A Active CN107562000B (en) | 2017-09-29 | 2017-09-29 | Mining communication equipment |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108538661A (en) * | 2018-05-31 | 2018-09-14 | 合肥开关厂有限公司 | A kind of mining urgent latch switch |
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