CN218996542U - Long-life signal type switch - Google Patents
Long-life signal type switch Download PDFInfo
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- CN218996542U CN218996542U CN202220082669.XU CN202220082669U CN218996542U CN 218996542 U CN218996542 U CN 218996542U CN 202220082669 U CN202220082669 U CN 202220082669U CN 218996542 U CN218996542 U CN 218996542U
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Abstract
The utility model relates to a long-life signal type switch, which is electrically connected with a control system, wherein the signal type switch is a foot switch or a travel switch, and comprises the following components: the device comprises a shell, a mechanical transmission part, an inductive proximity switch and a metal detection part, wherein the inductive proximity switch and the metal detection part are both positioned in the shell; the mechanical transmission part is connected with the metal detection part and is used for driving the metal detection part to move up and down or move back and forth when a user applies an operation instruction; the inductive proximity switch is electrically connected with the control system and is used for sending a control signal to the control system when the metal detection piece is detected, so that the control system controls and executes the operation corresponding to the operation instruction. The switch has long service life and high stability; moreover, the device has no influence on the outside when the device is damaged during the fault, and is more suitable for being applied to places with severe working environments or inflammable and explosive places and the like.
Description
Technical Field
The utility model relates to the technical field of signal control, in particular to a long-service-life signal type switch.
Background
In the technical field of signal control equipment, a switch is generally used for realizing switching on or switching off a control circuit, and a foot switch or a travel switch is commonly used. The foot switch is a switch for controlling the on-off of a circuit by stepping or treading; the travel switch, also called limit switch, uses the collision of mechanical moving parts to make the contact move to realize the connection or disconnection of the control circuit, thus achieving a certain control purpose.
However, the existing foot switch and travel switch adopt mechanical transmission to enable two contacts to be switched off or on, send out control signals, have short service life and have higher requirements on the stability and precision of fixing all parts; moreover, the position change and the closing performance of the existing foot switch and travel switch contact are good, the working environment has a certain influence on the foot switch and the travel switch contact, and the service life of the foot switch and the travel switch is greatly influenced by severe working environments such as metal dust, corrosive gas and the like. Sparks are generated during special faults, and accidents can be caused in flammable and explosive places.
Disclosure of Invention
The utility model aims to provide a long-life signal type switch.
In order to solve the problems, the utility model adopts the following technical scheme:
a long life signal type switch connected with a control system, the signal type switch being a foot switch or a travel switch, comprising: the device comprises a shell, a mechanical transmission part, an inductive proximity switch and a metal detection part, wherein the inductive proximity switch and the metal detection part are both positioned in the shell;
the mechanical transmission part is connected with the metal detection part and is used for driving the metal detection part to move up and down or move back and forth when a user applies an operation instruction;
the inductive proximity switch is electrically connected with the control system and is used for sending a control signal to the control system when the metal detection piece is detected, so that the control system controls and executes the operation corresponding to the operation instruction.
As one embodiment of the utility model, the signal switch is a foot switch, and the mechanical transmission part comprises: the metal detection part is a metal sheet;
wherein the rotating shaft is arranged in the shell, and the metal sheet is fixedly arranged on the rotating shaft;
the pedal is arranged outside the shell and connected with two ends of the rotating shaft, and is used for a user to drive the rotating shaft to rotate when being stressed, so that the metal sheet is driven to move up and down.
As one embodiment of the utility model, the inductive proximity switch comprises a first normally open proximity switch arranged in the shell through a bracket, and the detection height of the first 2-wire normally open proximity switch is consistent with the highest point to which the free end of the metal sheet can move;
the foot pedal is used for driving the metal sheet to move upwards when being stressed;
and the 2-wire normally open type proximity switch I is used for sending a connection signal to a control system when the metal sheet is detected, so that the control system controls the execution of the operation corresponding to the operation instruction.
As one embodiment of the utility model, the inductive proximity switch further comprises a second 2-wire normally open proximity switch arranged in the shell through a bracket, wherein the detection height of the second 2-wire normally open proximity switch is consistent with the static height position of the metal sheet;
the pedal is used for driving the metal sheet to move upwards when being stressed and is far away from the detection range of the second 2-wire normally-open type proximity switch, and the second 2-wire normally-open type proximity switch is used for sending a first disconnection signal to the control system when the metal sheet is not detected;
and the 2-wire normally open type proximity switch I is used for sending a switching-on signal to a control system when the metal sheet is detected, so that the control system controls to execute an operation corresponding to the operation instruction based on the switching-off signal I and the switching-on signal.
As one embodiment of the utility model, the inductive proximity switch further comprises a 2-wire normally-closed proximity switch provided in the housing by a bracket;
the pedal is used for driving the metal sheet to move upwards when being stressed, the metal sheet is sequentially detected by the 2-wire normally-closed proximity switch and the 2-wire normally-open proximity switch I, and after the metal sheet 4-1 moves in place, the 2-wire normally-open proximity switch I and the 2-wire normally-closed proximity switch both keep the detection state;
the 2-wire normally-closed proximity switch is used for sending a disconnection signal II to a control system when the metal sheet is detected;
the 2-wire normally open type proximity switch I is used for sending a switching-on signal to a control system when the metal sheet is detected, so that the control system can control to execute operation corresponding to the operation instruction based on the switching-off signal II and the switching-on signal.
As one embodiment of the utility model, the signal switch is a travel switch, and the mechanical transmission part includes: the first end of the swing rod is rotationally connected with the shell, the metal detection part is a metal rod arranged in the shell, an elastic reset part is arranged between the metal rod and the shell, and the second end is driven by force swing to extend out of the metal rod and is detected by the inductive proximity switch.
As an implementation mode of the utility model, the second end of the swing rod is provided with a rotating wheel, and the rotating wheel is stressed to drive the swing rod to swing.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in:
the long-life signal switch provided by the utility model comprises a foot switch and a travel switch, wherein the inductive proximity switch is arranged to detect a metal detection piece, and a control (on/off) signal is sent to a control system when the metal detection piece is detected, so that the control system is used for executing operation, and the structure is simple; and whether the metal detection piece moves up and down or moves back and forth, the metal detection piece can be detected by the inductive proximity switch, two contacts are not required to be mutually closed or opened, stability is improved, precision matching requirements are reduced, and failure rate is greatly reduced.
Drawings
Fig. 1 is a schematic structural diagram of a foot switch according to an embodiment of the present utility model.
Fig. 2 is a schematic structural diagram of another foot switch according to an embodiment of the present utility model.
Fig. 3 is a schematic structural diagram of another foot switch according to an embodiment of the present utility model.
Fig. 4 is a schematic structural diagram of a travel switch in a first state according to an embodiment of the present utility model.
Fig. 5 is a schematic structural diagram of a travel switch in a second state according to an embodiment of the present utility model.
Fig. 6 is a front view of fig. 4.
Wherein: 1. the device comprises a shell, a 2 mechanical transmission part, a 2-2 pedal, a 2-3 rotating shaft, a 2-4 rotating wheel, a 2-5 swinging rod, a 3-inductance type proximity switch, a 3-1 2 line normally open type proximity switch I, a 3-2 2 line normally open type proximity switch II, a 3-3 2 line normally closed type proximity switch, a 4-metal detection part, a 4-1 metal sheet and a 4-2 telescopic metal rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be clearly and completely described in connection with the following specific embodiments.
The embodiment of the utility model provides a long-life signal type switch, which is electrically connected with a control system, wherein the signal type switch is a foot switch or a travel switch, as shown in fig. 1, and comprises: the induction type proximity switch comprises a shell 1, a mechanical transmission part 2, an induction type proximity switch 3 and a metal detection piece 4, wherein the induction type proximity switch 3 and the metal detection piece 4 are both positioned inside the shell 1.
Wherein, the mechanical transmission part 2 is connected with the metal detection part 4 and is used for driving the metal detection part 4 to move up and down or move back and forth when a user applies an operation instruction;
the inductive proximity switch 3 is fixed inside the shell 1 through a bracket and is electrically connected with the control system, and the inductive proximity switch 3 is used for sending a connection signal to the control system when the metal detection piece 4 is detected, so that the control system controls and executes the operation corresponding to the operation instruction;
the applicable control system can be various brands of PLC or other control systems (such as a CYBELEC plate shearing machine system, a HOERBIGER bending machine system, a Siemens numerical control system, an industrial personal computer control system, a DCS and the like).
The switch provided by the embodiment of the utility model can be applied to a scene that a user needs to apply an operation instruction, the user can perform corresponding operation to enable the metal detection piece 4 to move up and down or move back and forth, the metal detection piece 4 is enabled to move from outside the detection range of the inductive proximity switch to within the detection range, the inductive proximity switch 3 detects the metal detection piece 4 and sends a control signal to the control system, and the control system can control and execute operation corresponding to the operation instruction.
The foot switch and the travel switch provided by the utility model detect the metal detection piece 4 through the inductive proximity switch 3, and send a control signal to the control system when detecting, so as to execute operation through the control system, and the structure is simple; and, no matter the metal detection piece 4 moves up and down or moves back and forth, the metal detection piece can be detected by the inductive proximity switch, and two contacts are not required to be contacted with each other, so that the stability and the reliability are improved, the precision matching requirement is reduced, and the failure rate is greatly reduced.
In addition, the on and off states of the signals of the inductive proximity switch 3 are changed in the shell 1, so that the conditions of travel, change of the contacts caused by the environment and the like in the state change of the contacts are avoided, only metal dust affecting the detection effect can affect the detection effect (for example, iron or steel metal dust can affect the detection distance and the detection accuracy of the proximity switch), and the service life is long; moreover, the device is damaged in the fault, has no influence on the outside, and is more suitable for being applied to places with severe working environments or inflammable and explosive places and the like.
Hereinafter, the present utility model will be described with respect to the configuration of the signal type switch when the signal type switch is a foot switch and a travel switch, respectively.
When the signal-type switch is a foot switch, in one possible implementation, the mechanical transmission part 2 comprises: the structure of the foot pedal 2-2 that the foot pedal 2-2 drives the detecting member of the metal detecting member 4 to move back and forth or to move up and down when being stressed, and drives the metal detecting member 4 to move back and forth can adopt the structure of the foot pedal 2-2 that drives the contact (which is used as the metal detecting member 4) when being stressed in the existing market, and the embodiment of the utility model is not repeated here.
Hereinafter, the present utility model will be mainly described with respect to a structure in which the metal detecting member 4 moves up and down, and as shown in fig. 1 to 3, the mechanical transmission portion 2 further includes: the rotating shaft 2-3, the metal detection piece 4 comprises a metal sheet 4-1, and moves upwards along with the rotation of the rotating shaft 2-3;
wherein the rotating shaft 2-3 is arranged in the shell 1, and the metal sheet 4-1 is fixedly arranged on the rotating shaft;
the pedal plate 2-2 is arranged outside the shell 1 and is connected with two ends of the rotating shaft 2-3, and the pedal plate 2-2 is used for driving the rotating shaft 2-3 to rotate when being stressed so as to drive the metal sheet 4-1 to move up and down.
In this case, the structure of the inductive proximity switch 3 may be, but not limited to, the following three ways in order to realize the function of the inductive proximity switch 3.
In a first mode, as shown in fig. 1, the inductive proximity switch 3 comprises a 2-wire normally open proximity switch I3-1 arranged in the shell through a bracket, and the detection height of the 2-wire normally open proximity switch I3-1 is the same as the highest point to which the free end of the metal sheet 4-1 can move;
the pedal plate 2-2 is used for driving the metal sheet 4-1 to move upwards when being stressed;
and the 2-wire normally open type proximity switch 3-1 is used for sending a switch-on signal to a control system when the metal sheet 4-1 is detected, so that the control system controls the execution of the operation corresponding to the operation instruction.
Namely, when the user does not operate the pedal plate 2-2, the metal sheet 4-1 is not in the detection range of the proximity switch, the proximity switch is kept in an initial state, and the control system receives a disconnection signal; after the foot switch is pressed, the metal sheet 4-1 moves upwards, and after the proximity switch detects, a switch-on signal is sent to the control system, so that the control system controls and executes the operation corresponding to the operation instruction.
Based on the second mode and the first mode, the inductive proximity switch 3 further comprises a second 2-wire normally-open proximity switch 3-2 arranged in the shell through a bracket, and the detection height of the second 2-wire normally-open proximity switch 3-2 is consistent with the static height position of the metal sheet 4-1; in the embodiment of the present utility model, the state in which the metal sheet 4-1 is in when the foot pedal 2-2 is not operated is defined as static.
The 2-wire normally open type proximity switch II 3-2 is used for sending a disconnection signal I to the control system when the metal sheet 4-1 is not detected;
the 2-wire normally open proximity switch 3-1 is used for sending a switch-on signal to a control system when the metal sheet 4-1 is detected, so that the control system controls to execute an operation corresponding to the operation instruction based on the switch-off signal and the switch-on signal.
Namely, when the pedal plate 2-2 is not operated, the 2-wire normally open type proximity switch II 3-2 sends a closing signal to the control system when the metal sheet 4-1 is detected. After the pedal plate 2-2 is operated, the normally open type proximity switch II 3-2 firstly transmits a disconnection signal I because the metal sheet 4-1 moves upwards from the detection range, and then is detected by the 2-wire normally open type proximity switch I3-1 along with the rotation of the metal sheet 4-1, and then transmits a connection signal to the control system, and the control system controls to execute the operation corresponding to the operation instruction based on the received disconnection signal I and the received connection signal.
The third mode, on the basis of the first mode, the inductive proximity switch 3 further comprises a 2-wire normally-closed proximity switch 3-3 arranged in the shell through a bracket.
The pedal plate 2-2 is used for driving the metal sheet 4-1 to move upwards when being stressed, the metal sheet 4-1 is sequentially detected by the 2-wire normally-closed type proximity switch 3-3 and the 2-wire normally-open type proximity switch 3-1, and after the metal sheet 4-1 moves in place, the 2-wire normally-open type proximity switch 3-1 and the 2-wire normally-closed type proximity switch 3-3 are both kept in a detection state;
the 2-wire normally-closed proximity switch 3-3 is used for sending a disconnection signal II to a control system when the metal sheet 4-1 is detected;
the 2-wire normally open proximity switch one 3-1 is used for sending a switching-on signal to a control system when the metal sheet 4-1 is detected, so that the control system controls to execute an operation corresponding to the operation instruction based on the switching-off signal two and the switching-on signal.
That is, when not in operation, no metal detection object is in the detection range of the proximity switch, and the initial state is maintained. After the pedal plate 2-2 is operated, the free end of the metal sheet 4-1 rotates and moves upwards, after the metal sheet 4-1 moves in place, the 2 proximity switches all keep a detection state, and the detection state is detected by the 2-wire normally-closed proximity switch 3-3, a disconnection signal II is sent to the control system, and then the detection state is detected by the 2-wire normally-open proximity switch 3-1, and a connection signal is sent to the control system. The control system controls to execute the operation corresponding to the operation instruction based on the first received second switching-off signal and the second received switching-on signal.
According to the three modes, different types of proximity switches are arranged, and different signals are sent through the plurality of proximity switches, so that the control system can operate various types of operation instructions.
Of course, the utility model adopts a two-wire inductance type proximity switch by way of example, and can also adopt a Hall type proximity switch, a capacitance type proximity switch, a photoelectric type proximity switch and a magnetic switch as detection signal switches, and can adopt the same or similar design structure (the detection objects move due to mechanical transmission) and working principle (the detection signal switch state changes after the detection objects move to a detection range), and attention is paid to selecting the detection objects matched with the detection switch according to different types of the detection signal switches. Further, to improve stability of the control signal and reduce the capacity of the operating power supply, a three-wire inductive proximity switch or other types of switches as exemplified above may be used, provided that it is ensured that the functions according to the present utility model are achieved.
When the signal type switch is a travel switch, as shown in fig. 4 to 6, the mechanical transmission part 2 includes: the swing rod 2-5, the swing rod 2-5 is rotatably connected with the shell 1, the metal detection piece 4 is a metal rod 4-2 installed inside the shell, an elastic reset piece (not shown in the figure) is arranged between the metal rod 4-2 and the shell 1, and the second end is forced to swing to drive the metal rod 4-2 to extend out and be detected by the inductive proximity switch 3.
The structure that the second end of the swing rod 2-5 is forced to drive the metal rod 4-2 to move forward can adopt a common cam structure or a common connecting rod structure, and the utility model is not limited in particular.
Further, a rotating wheel 2-5 is arranged at the second end of the swinging rod, the rotating wheel 2-4 is stressed to drive the swinging rod 2-5 to swing, namely, an object applies force to the rotating wheel 2-4 after a user applies an operation instruction, the rotating wheel 2-4 is stressed to drive the swinging rod 2-5 to swing, and then the metal rod 4-2 stretches out to be detected by the inductive proximity switch 3, and a connection signal is sent to a control system so that the control system can control and execute the operation corresponding to the operation instruction.
It should be noted that, the operation power supply voltages of the inductive proximity switch adopted by the foot switch and the travel switch in the utility model are different, and are divided into an alternating current 220V (180-240V is available) class and a direct current 24V class (the application range of the inductive proximity switch is 6-36V, 12-24V, 10-30V or the like), and products with proper voltage grades are selected according to the operation conditions.
Claims (7)
1. A long life signal type switch, characterized in that it is electrically connected with a control system, the signal type switch is a foot switch or a travel switch, comprising: the device comprises a shell, a mechanical transmission part, an inductive proximity switch and a metal detection part, wherein the inductive proximity switch and the metal detection part are both positioned in the shell;
the mechanical transmission part is connected with the metal detection part and is used for driving the metal detection part to move up and down or move back and forth when a user applies an operation instruction;
the inductive proximity switch is electrically connected with the control system and is used for sending a control signal to the control system when the metal detection piece is detected, so that the control system controls and executes the operation corresponding to the operation instruction.
2. The long life signal type switch of claim 1, wherein said signal type switch is a foot switch, said mechanical transmission portion comprising: the metal detection piece comprises a metal sheet;
wherein the rotating shaft is arranged in the shell, and the metal sheet is fixedly arranged on the rotating shaft;
the pedal is arranged outside the shell and connected with two ends of the rotating shaft, and is used for driving the rotating shaft to rotate when being stressed, so as to drive the metal sheet to move up and down.
3. The long life signal type switch of claim 2, wherein said inductive proximity switch comprises a 2-wire normally open type proximity switch one disposed in said housing by a bracket, said 2-wire normally open type proximity switch one having a detection height in accordance with a highest point to which said free end of said metal sheet can be moved;
the foot pedal is used for driving the metal sheet to move upwards when being stressed;
and the 2-wire normally open type proximity switch I is used for sending a connection signal to a control system when the metal sheet is detected, so that the control system controls the execution of the operation corresponding to the operation instruction.
4. The long-life signal type switch of claim 3, wherein said inductive proximity switch further comprises a second 2-wire normally open proximity switch disposed in said housing by a bracket, said second 2-wire normally open proximity switch having a detection height consistent with a static height position of said metal sheet;
the pedal is used for driving the metal sheet to move upwards when being stressed and is far away from the detection range of the second 2-wire normally-open type proximity switch, and the second 2-wire normally-open type proximity switch is used for sending a first disconnection signal to the control system when the metal sheet is not detected;
and the 2-wire normally open type proximity switch I is used for sending a switching-on signal to a control system when the metal sheet is detected, so that the control system controls to execute an operation corresponding to the operation instruction based on the switching-off signal I and the switching-on signal.
5. A long life signal type switch according to claim 3, wherein said inductive proximity switch further comprises a 2-wire normally closed proximity switch disposed within said housing by a bracket;
the pedal is used for driving the metal sheet to move upwards when being stressed, the metal sheet is sequentially detected by the 2-wire normally-closed type proximity switch and the 2-wire normally-open type proximity switch I, and after the metal sheet moves in place, the 2-wire normally-open type proximity switch I and the 2-wire normally-closed type proximity switch both keep the detection state;
the 2-wire normally-closed proximity switch is used for sending a disconnection signal II to a control system when the metal sheet is detected;
the 2-wire normally open type proximity switch I is used for sending a switching-on signal to a control system when the metal sheet is detected, so that the control system can control to execute operation corresponding to the operation instruction based on the switching-off signal II and the switching-on signal.
6. The long life signal type switch of claim 1, wherein said signal type switch is a travel switch, said mechanical transmission portion comprising: the first end of the swing rod is rotationally connected with the shell, the metal detection part is a metal rod arranged in the shell, an elastic reset part is arranged between the metal rod and the shell, and the second end is driven by force swing to extend out of the metal rod and is detected by the inductive proximity switch.
7. The long life signal switch of claim 6, wherein the second end of the rocker is provided with a rotating wheel, the rotating wheel being forced to drive the rocker to swing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220082669.XU CN218996542U (en) | 2022-01-13 | 2022-01-13 | Long-life signal type switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220082669.XU CN218996542U (en) | 2022-01-13 | 2022-01-13 | Long-life signal type switch |
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| Publication Number | Publication Date |
|---|---|
| CN218996542U true CN218996542U (en) | 2023-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220082669.XU Active CN218996542U (en) | 2022-01-13 | 2022-01-13 | Long-life signal type switch |
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| Country | Link |
|---|---|
| CN (1) | CN218996542U (en) |
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- 2022-01-13 CN CN202220082669.XU patent/CN218996542U/en active Active
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