CN110993384A - Contact switch, anti-extrusion device for mobile operation platform and aerial work machine - Google Patents
Contact switch, anti-extrusion device for mobile operation platform and aerial work machine Download PDFInfo
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- CN110993384A CN110993384A CN201911244392.5A CN201911244392A CN110993384A CN 110993384 A CN110993384 A CN 110993384A CN 201911244392 A CN201911244392 A CN 201911244392A CN 110993384 A CN110993384 A CN 110993384A
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- conductive part
- contact
- contact switch
- contact member
- mounting box
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- 238000001125 extrusion Methods 0.000 title claims abstract description 17
- 230000008602 contraction Effects 0.000 claims abstract description 3
- 238000013016 damping Methods 0.000 claims description 19
- 230000007246 mechanism Effects 0.000 claims description 15
- 230000009471 action Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
- H01H3/16—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift
- H01H3/161—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift for actuation by moving a closing member, e.g. door, cover or lid
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
- H01H3/16—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift
- H01H3/161—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift for actuation by moving a closing member, e.g. door, cover or lid
- H01H3/162—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift for actuation by moving a closing member, e.g. door, cover or lid associated with a hinge of the closing member
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
Abstract
The invention relates to a switch, and particularly discloses a contact switch, which comprises a first conductive part, a second conductive part and a mounting box, wherein the first conductive part can be pivotally mounted on the mounting box, the second conductive part can be elastically and telescopically arranged on the mounting box, and the first conductive part and the second conductive part are matched to switch the contact switch between an open state and a closed state, wherein in the open state, the first conductive part and the second conductive part are not in contact, in the closed state, the first conductive part and the second conductive part are in electrical contact, and the first conductive part can keep the closed state of the contact switch when rotating in a set position range through the elastic expansion and contraction of the second conductive part. In addition, the invention also discloses an anti-extrusion device of the mobile operation platform and an aerial work machine. The contact switch has simple structure and high reliability, and is particularly suitable for an open-close type anti-extrusion device.
Description
Technical Field
The present invention relates to a switch, and particularly, to a contact switch. In addition, the invention also relates to an anti-extrusion device for the movable operating platform and an aerial work machine.
Background
Safety of mobile consoles, typically for example, work platforms of aerial work machines, consoles or driving operation dashboard areas of ground mobile work vehicles, console areas of mobile work equipment inside buildings, etc., is of great importance.
In the operation or construction process, due to the complex operation environment, the equipment or the vehicle does not notice a large-size obstacle behind the equipment or cannot cause huge extrusion injury or even casualty accidents to operators in the mobile operation platform when the equipment or the vehicle moves backwards or backs a car or an accidental falling object impacts behind the equipment or the vehicle.
In order to prevent injuries to the operator in the event of the above-mentioned accidents or malfunctions, the mobile stations of the prior art are mostly provided with means for preventing jamming. The sensing circuit system of the anti-extrusion device is an important component of the anti-extrusion device, and the common sensing circuit system adopts the following steps: 1. the magnetic adsorption type circuit breaker is used for breaking a circuit when an operator is extruded and injured; 2. the pressing switch sends a signal when the pressure reaches a set value; 3. the infrared laser sensor sends out signals when light is blocked; 4. press-contact switches triggered by squeezing.
However, the switches and sensors adopted by the sensing circuit system in the prior art have certain defects, the magnetic adsorption type circuit breaker and the infrared laser sensor have high failure rate and low stability, and the operation personnel can stop the equipment due to slightly large motion amplitude, so that the working efficiency is seriously reduced; the pressing switch and the pressing switch have higher requirements on the stress direction, and the switch can not be triggered when an operator is extruded.
In view of this, it is desirable to design a switch with higher safety and better stability.
Disclosure of Invention
The object of the first aspect of the present invention is to provide a contact switch having a simple structure and high reliability.
The technical problem to be solved by the second aspect of the present invention is to provide an anti-squeezing device for a mobile console, which has good safety, high reliability and wide protection angle range.
The third aspect of the present invention is to provide an aerial work machine, where an operation platform of the aerial work machine is capable of effectively preventing squeezing, has a wide protection angle range, good safety, high stability, and is capable of effectively preventing misoperation.
In order to achieve the above object, a first aspect of the present invention provides a contact switch, including a first conductive portion, a second conductive portion, and a mounting case, the first conductive portion being pivotably mounted on the mounting case, the second conductive portion being elastically and telescopically disposed on the mounting case, the first conductive portion and the second conductive portion cooperating to switch the contact switch between an open state and a closed state, wherein in the open state, the first conductive portion and the second conductive portion are not in contact, and in the closed state, the first conductive portion and the second conductive portion are in electrical contact, and the first conductive portion is rotated within a set position range by elastic and telescopic movement of the second conductive portion to maintain the closed state of the contact switch.
As a specific structural form, the first conductive portion includes a first contact member and an elastic damping element predisposed to have an elastic force that causes the first contact member to be in or to return towards a closed position.
In particular, the elastic damping element is a torsion spring, a spring or an elastic rubber provided on the first contact member.
More specifically, the first conductive part is a spring hinge, one side of the spring hinge is fixedly connected with the mounting box, and the other side of the spring hinge can rotate around a rotating shaft of the spring hinge.
As a specific structural form, the second conductive portion includes an elastic element and a second contact member, the elastic element being preset to have an elastic force that causes the second contact member to be held in contact with the first contact member that rotates within a set position range.
Specifically, the elastic element is a torsion spring, a spring or elastic rubber.
More specifically, one end of the elastic element abuts against the second contact member, the other end of the elastic element abuts against the mounting box, and the second contact member and the mounting box form a limiting structure to prevent the second contact member from falling off.
As a specific configuration, the contact switch further includes a signal line, and the mounting box has an accommodation cavity for accommodating the signal line, and the signal line is connected to the first contact member or the second contact member.
The utility model provides a remove operation panel and prevent extrusion device, includes operation mesa, any one in opening and shutting mechanism and the first aspect technical scheme contact switch, contact switch set up in the left side and/or the right side of operation mesa, opening and shutting mechanism with contact switch's first conductive part is connected, opening and shutting mechanism can drive first conductive part rotates, first conductive part rotates and surpasss after setting for the position scope, contact switch disconnection.
Preferably, the mobile operation console anti-squeezing device comprises more than two contact switches, the contact switches are arranged in parallel, and the first conducting parts of the contact switches are preset to keep the contact switches in a closed state in different setting position ranges.
An aerial work machine comprises the anti-extrusion device of the mobile operation platform in the technical scheme of the second aspect.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The following drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the scope of the invention. In the drawings:
fig. 1 is a schematic view showing the overall structure of an anti-squeezing device according to an embodiment of the present invention, in which an opening and closing mechanism is in an open state and a contact switch is in an open state;
fig. 2 is a partial enlarged view at B of fig. 1;
FIG. 3 is a schematic diagram of a first conductive portion according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a second conductive portion according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a mounting box according to an embodiment of the present invention;
FIG. 6 is a schematic view of the installation of a contact switch according to one embodiment of the present invention; .
Fig. 7 is a schematic view of the installation of a contact switch according to another embodiment of the present invention.
Description of reference numerals:
1 first conductive part 11 first contact member
12 elastic damping element
2 second conductive part 21 second contact member
22 elastic element
3 mounting case 31 mounting case body
32 mounting box baffle
4 signal line 5 operation table top
6 mechanism opens and shuts
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, and it is to be understood that the detailed description is provided for purposes of illustration and explanation and is not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "disposed" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; the two elements may be connected directly or indirectly through intervening media, or may be connected through one another or in any combination thereof. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1 and 2, a basic embodiment of the present invention provides a contact switch including a first conductive part 1, a second conductive part 2, and a mounting case 3, the first conductive part 1 being pivotably mounted on the mounting case 3, the second conductive part 2 being elastically and telescopically disposed on the mounting case 3, the first conductive part 1 cooperating with the second conductive part 2 to switch the contact switch between an open state and a closed state. When the first conductive part 1 rotates within a set position range, the second conductive part 2 can elastically stretch and contract to keep contact with the first conductive part 1, so that the contact switch is in a closed state; when the rotation angle of the first conductive part 1 is too large and the first conductive part 1 rotates to exceed the set position range, the first conductive part 1 and the second conductive part 2 are separated from contact because the elastic expansion amount of the second conductive part 2 is limited, and the contact switch is switched to an off state. The traditional magnetic adsorption switch, the infrared laser sensor and the like can be immediately broken off once a magnetic field or light is detected to be blocked, and the fault tolerance rate is low, but the contact switch can prevent a user from being troubled by the contact switch, when the first conductive part 1 of the contact switch is pushed by external force to rotate in a set position, the contact switch cannot be broken off, the fault tolerance rate is high, meanwhile, the safety of the contact switch can be ensured, and once the rotating position of the first conductive part 1 exceeds the range of the set position, the contact switch can be immediately broken off. Moreover, the user can adjust the elastic expansion amount of the second conductive part 2 according to actual needs to adjust the rotatable angle of the first conductive part 1 under the condition of keeping the contact switch closed, and when the elastic expansion amount of the second conductive part 2 is increased, the rotatable angle of the corresponding first conductive part 1 is also increased, so that the contact switch can be applicable to different use situations by simply adjusting the elastic expansion amount of the second conductive part 2.
Referring to fig. 2 and 3, in particular, the first conductive part 1 comprises a first contact member 11 and an elastic damping element 12, the elastic damping element 12 being predisposed to have an elastic force that causes the first contact member 11 to be in or to return towards a closed position, wherein the closed position of the first contact member 11 is the position in which the first contact member 11 causes the second conductive part 2 to be compressed to the maximum extent. When the first contact member 11 rotates within the range of the set position, the first contact member 11 can be kept in contact with the second conductive part 2, and due to the existence of the preset elastic force of the elastic damping element 12, when an operator accidentally touches the first contact member 11, the first contact member 11 cannot easily pivot due to the resistance of the elastic force, and a certain external force needs to be applied to overcome the elastic force of the elastic damping element 12 to pivot, so that unintentional misoperation can be effectively prevented. In addition, after the first contact member 11 rotates by a certain angle under the action of external force, the first contact member 11 can return to the closed position under the action of the elastic force of the elastic damping element 12, so that the contact switch can be automatically reset to the closed state, and the trouble that the contact switch needs to be installed again or reset is effectively avoided. Specifically, the elastic damping element 12 may be a torsion spring, a spring, an elastic rubber, or the like disposed on the first contact member 11, and the magnitude of the external force required to open the contact switch may be adjusted by adjusting the type or type of the elastic damping element 12. The specific structure and arrangement of the elastic damping element 12 and the first contact member 11 of the present invention may be various, for example, the first contact member 11 may be a single leaf structure with one end hinged to the mounting box 3 and the other end capable of freely rotating, the elastic damping element 12 is a rubber body or a tension spring with one end fixed to the mounting box 3 and the other end connected to the leaf, and the elastic damping element 12 may apply an elastic force to the first contact member 11 to return to the closed position. As a preferred form of construction, with reference to fig. 3, the first conductive part 1 is of a similar construction to a sprung hinge, the elastic damping element 12 being formed as a torsion spring at the pivot of the sprung hinge, the first contact member 11 being formed as a leaf on one of its sides, rotatable about the pivot of the sprung hinge itself, and the other side of the sprung hinge being fixedly connected to the mounting box 3.
Referring to fig. 2 and 4, the second conductive part 2 includes an elastic element 22 and a second contact member 21, when the first contact member 11 is rotated in a set position under the pushing of an external force, the elastic element 22 can provide an elastic force, so that the second contact member 21 is kept in contact with the first contact member 11, it can be understood that, in order to ensure that the first contact member 11 can be in a closed position and automatically reset after being pushed by the external force, the elastic force provided by the elastic damping element 12 of the first conductive part 1 can overcome the elastic force provided by the elastic element 22 of the second conductive part 2, when the first contact member 11 is rotated, the second contact member 21 gradually extends to be kept in contact with the first contact member 11, and when the rotation position of the first contact member 11 exceeds a defined position range, the extension height of the second contact member 21 reaches a limit, the first contact member 11 is separated from the second contact member 21, when the external force pushing the first contact member 11 is relieved or disappears, the first contact member 11 is restored by the elastic force of the elastic damping element 12, and the second contact member 21 is restored by the pressure of the first contact member 11.
As a specific structure form, an elastic element 22 is installed in the mounting box 3, one end of the elastic element 22 abuts against the second contact member 21, the other end abuts against the mounting box 3, and the second contact member 21 and the mounting box 3 form a limiting structure to enable the second contact member 21 to extend and contract within a set position range. More specifically, referring to fig. 4, the second contact member 21 is a stepped shaft structure, and a stepped hole for mounting the second contact member 21 is provided on the corresponding mounting box 3, and the stepped shaft structure and the stepped hole form a limit structure to prevent the second contact member 21 from being separated from the mounting box 3, but of course, other limit structures may be adopted, and it is sufficient to prevent the second contact member 21 from being separated. Specifically, the elastic member 22 may be a torsion spring, a spring, elastic rubber, or the like.
Further, the contact switch transmits signals through the signal line 4, the mounting box 3 has a receiving cavity for receiving the signal line 4, and the signal line 4 can be connected with the first contact member 11 or the second contact member 21. Specifically, referring to fig. 4 and 5, the mounting box 3 may include a mounting box main body 31 and a mounting box baffle 32, when the second conductive part 2 is mounted, the second contact member 21 is placed in the stepped hole of the mounting box main body 31, one end of the elastic element 22 abuts against the second contact member 21 or is directly connected to the second contact member 21, the signal line 4 is placed in the groove of the mounting box main body 31, one end of the signal line 4 is connected to the second contact member 21, and after the signal line 4 and the second conductive part 2 are mounted in place, the mounting box baffle 32 is fixed to the mounting box main body 31. Thus, the contact switch of the present invention is easy to assemble and disassemble, the maintenance of the contact switch can be performed by removing the mounting box baffle 32, and the rotatable range of the first conductive part 1 under the condition of keeping the contact switch in the closed state can be adjusted by changing the length of the second contact member 21 extending out of the mounting box 3 after removing the mounting box baffle 32.
The contact switch can be applied to control circuits of various devices according to actual needs, and is particularly suitable for a sensing circuit of an open-close type anti-extrusion device because the contact switch is opened and closed through the rotation of the first conductive part 1. Referring to fig. 1, the anti-extrusion device for a mobile operating platform of the present invention comprises an operating platform 5, an opening and closing mechanism 6 and a contact switch in any one of the above technical solutions, wherein the contact switch is disposed on the left side and/or the right side of the operating platform 5, the opening and closing mechanism 6 is connected to a first conductive part 1 of the contact switch through a bolt, the opening and closing mechanism 6 can drive the first conductive part 1 to rotate, and when the first conductive part 1 rotates beyond a set position range, the contact switch is disconnected, so as to protect an operator. The mobile operation platform of the present invention generally refers to a platform or an area for controlling, driving, and operating by an operator on various machines or devices, including but not limited to an operation platform of an aerial work machine, a center console of a concrete device, and a driving operation area of a forklift used in a factory or other places. The opening and closing mechanism 6 of the anti-extrusion device of the mobile operating platform can be a single-opening and closing mechanism comprising a single opening and closing piece, a contact switch arranged on one side of the left side and the right side of the operating platform surface 5 is hinged with one end of the opening and closing piece, and an interval through which an operator can not pass is arranged between the other side of the operating platform surface 5 and the other end of the opening and closing piece; or the opening and closing mechanism 6 is a split opening and closing mechanism comprising paired opening and closing members, the left side and the right side of the operating table top 5 are respectively provided with a contact switch, and the opening and closing members are respectively connected with the two contact switches. One end of a signal wire 4 in the contact switch is connected with the second conductive part 2 or the first conductive part 1, the other end of the signal wire is connected with a control unit in the anti-extrusion device of the mobile operation platform, and when the opening and closing part drives the first conductive part 1 to rotate within a set position range, the contact switch cannot be broken, so that enough operation space is provided for an operator, and the condition that equipment stops running due to the fact that the opening and closing part is pushed by the action of the operator greatly is effectively prevented; when the rotating angle of the opening and closing member is too large, the rotating position of the first conductive part 1 of the contact switch exceeds the set position range, the contact switch is in a disconnected state, and after the contact switch is detected to be in the disconnected state, the control unit can control the movable operating platform of the anti-extrusion device to brake or move towards the safe direction, so that operators are prevented from being injured.
Further, referring to fig. 6, the mobile operation station anti-pressing device of the present invention may include more than two contact switches, which are arranged in parallel, and the second contact members 21 of the contact switches are adjusted such that the amount of expansion and contraction of the second contact members 21 of each contact switch is different, so that the ranges in which the first conductive parts 1 of the contact switches can rotate while maintaining the contact switches in the closed state are different. If two contact switches are arranged in parallel, the anti-extrusion device for the mobile operation platform can form secondary signal feedback, when the contact switch of the first layer is in an open circuit, the control unit sends out an early warning signal, such as an early warning lamp is lightened to remind an operator to adjust the action, when the rotation angle of the opening and closing piece is larger, the contact switch of the second layer is in an open circuit, the control unit controls the mobile operation platform to brake or move reversely, safety protection is provided for the operator, and therefore the control unit of the mobile operation platform has hierarchical judgment on the control operation of the mobile operation platform, and normal operation of the mobile operation platform is prevented from being influenced by misoperation.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention. It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (11)
1. A contact switch, characterized by comprising a first conductive part (1), a second conductive part (2) and a mounting box (3), the first conductive part (1) is pivotably mounted on the mounting box (3), the second conductive part (2) is elastically and telescopically arranged on the mounting box (3), the first conductive part (1) cooperating with the second conductive part (2) to switch the contact switch between an open state and a closed state, wherein in the open state the first conductive part (1) and the second conductive part (2) are not in contact, in the closed state, the first conductive part (1) and the second conductive part (2) are in electrical contact, and the first conductive part (1) can keep the closed state of the contact switch when rotating in a set position range through the elastic expansion and contraction of the second conductive part (2).
2. A contact switch according to claim 1, characterised in that said first conductive part (1) comprises a first contact member (11) and an elastic damping element (12), the elastic damping element (12) being predisposed to have an elastic force that causes said first contact member (11) to be in or to return towards the closed position.
3. A contact switch according to claim 2, characterized in that the elastic damping element (12) is a torsion spring, a spring or an elastic rubber provided on the first contact member (11).
4. Contact switch according to claim 2, characterized in that said first conductive part (1) is a sprung hinge, one side of which is fixedly connected to said mounting box (3) and the other side is able to rotate about its own axis of rotation.
5. Contact switch according to any of claims 1 to 4, characterised in that the second conductive part (2) comprises an elastic element (22) and a second contact member (21), the elastic element (22) being predisposed to have an elastic force such that the second contact member (21) remains in contact with the first contact member (11) rotating within a set range of positions.
6. Contact switch according to claim 5, characterized in that the elastic element (22) is a torsion spring, a spring or an elastic rubber.
7. A contact switch according to claim 5, characterized in that said elastic element (22) abuts against said second contact member (21) at one end and against said mounting box (3) at the other end, said second contact member (21) and said mounting box (3) forming a limit structure to prevent said second contact member (21) from falling off.
8. A contact switch according to claim 5, further comprising a signal wire (4), wherein the mounting box (3) has a housing cavity for housing the signal wire (4), and wherein the signal wire (4) is connected to the first contact member (11) or the second contact member (21).
9. The utility model provides a remove operation panel and prevent extrusion device, characterized in that, including operation mesa (5), opening and shutting mechanism (6) and according to any one of claims 1 to 8 contact switch, contact switch set up in the left side and/or the right side of operation mesa (5), opening and shutting mechanism (6) with contact switch's first conductive part (1) is connected, opening and shutting mechanism (6) can drive first conductive part (1) rotate, first conductive part (1) rotate and exceed behind the settlement position scope, contact switch disconnection.
10. The mobile operator station anti-jamming device according to claim 9, characterized by comprising more than two said contact switches, said contact switches being arranged in parallel, and the first conducting part (1) of said contact switches being predisposed to keep said contact switches in a closed state within different said ranges of set positions.
11. An aerial work machine comprising a mobile operator station anti-racking device according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911244392.5A CN110993384B (en) | 2019-12-06 | 2019-12-06 | Contact switch, anti-extrusion device for mobile operation platform and aerial work machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911244392.5A CN110993384B (en) | 2019-12-06 | 2019-12-06 | Contact switch, anti-extrusion device for mobile operation platform and aerial work machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110993384A true CN110993384A (en) | 2020-04-10 |
| CN110993384B CN110993384B (en) | 2020-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911244392.5A Active CN110993384B (en) | 2019-12-06 | 2019-12-06 | Contact switch, anti-extrusion device for mobile operation platform and aerial work machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110993384B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1879265A (en) * | 2003-09-11 | 2006-12-13 | 马格科德股份公司 | Device for establishing an electrical connection |
| CN1885462A (en) * | 2006-06-15 | 2006-12-27 | 邱营营 | Novel switch |
| CN102751115A (en) * | 2011-04-22 | 2012-10-24 | 鸿富锦精密工业（深圳）有限公司 | Early warning switch and box body using same |
-
2019
- 2019-12-06 CN CN201911244392.5A patent/CN110993384B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1879265A (en) * | 2003-09-11 | 2006-12-13 | 马格科德股份公司 | Device for establishing an electrical connection |
| CN1885462A (en) * | 2006-06-15 | 2006-12-27 | 邱营营 | Novel switch |
| CN102751115A (en) * | 2011-04-22 | 2012-10-24 | 鸿富锦精密工业（深圳）有限公司 | Early warning switch and box body using same |
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| Publication number | Publication date |
|---|---|
| CN110993384B (en) | 2020-11-27 |
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