CN220272413U - Optical fiber pull-cord switch - Google Patents

Abstract

The utility model discloses an optical fiber pull switch, which belongs to the technical field of switch equipment and comprises a shell, wherein a button rod assembly, a pull rod assembly, a contact pushing block and an optical fiber micro switch are arranged in the shell, the button rod assembly and the pull rod assembly drive the contact pushing block to move when axially moving, the optical fiber micro switch is positioned at one side of the contact pushing block, and a trigger rod for pushing the optical fiber micro switch when the contact pushing block moves, one end part of the button rod assembly and/or the pull rod assembly extends out of the shell, so that a mechanical action signal input by the button assembly and/or the pull rod assembly can be mapped into an optical signal, the optical signal in an optical fiber connected with the optical fiber micro switch is transmitted through an optical fiber, and the optical fiber micro switch with different wavelength specifications can be used for realizing the connection of one optical fiber core and positioning each switch position, thereby having extremely long service life, stability, reliability and weather resistance, and the field does not need to supply power.

Description

Optical fiber pull-cord switch

Technical Field

The utility model belongs to the technical field of switching equipment, and particularly relates to an optical fiber pull-cord switch.

Background

Currently, all protection switches (sensors) including a pull switch are often power-on switches in an integrated protection system for industrial equipment such as a belt conveyor. For economy, the switch is transmitted to an upper control system through a certain communication system to realize the positioning of a plurality of switches, but the scheme needs to increase a control power supply, has complex system composition, has electronic devices to be installed on an industrial site, and is easy to influence by site temperature. And the method is often influenced by on-site strong electromagnetic interference, various problems such as oxidation of a communication cable joint and the like, so that the communication quality is reduced, even the line is dropped and the like, and the method has great influence on the equipment failure shutdown rate.

Disclosure of Invention

The technical problems to be solved by the utility model are as follows: the optical fiber pull-cord switch can map mechanical action signals into optical signals, transmits the switching signals through optical fibers as media, is convenient to position, is not easily affected by external environment, and does not have the problem of power supply in an ultra-long distance.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

the utility model provides an optical fiber pull switch, includes the casing, be provided with button pole subassembly, pull rod subassembly, contact pushing block and optical fiber micro-gap switch in the casing, button pole subassembly with the pull rod subassembly action drives when carrying out axial displacement the contact pushing block removes, optical fiber micro-gap switch is located one side of contact pushing block just the contact pushing block promotes when removing optical fiber micro-gap switch's trigger lever, button pole subassembly and/or the one end tip of pull rod subassembly stretches out the casing.

Further, the button rod assembly comprises a connecting rod and a button extending out of the shell, the contact pushing block is fixed on the connecting rod, the peripheral surface of the contact pushing block is a conical surface, and the diameter of the conical surface, which is close to one end of the optical fiber micro switch, is smaller than the diameter of the end, which is far away from the optical fiber micro switch.

Further, a station holding assembly is further arranged in the shell, and the station holding assembly is matched with a structure on the connecting rod to enable the contact pushing block to be located at an upper station which does not act or a lower station which presses the optical fiber micro switch trigger rod.

Further, two grooves are formed in the circumferential end face of the connecting rod, a plurality of mounting holes are formed in the shell along the radial direction of the connecting rod, a retaining spring and a steel ball are arranged in the mounting holes, and when the retaining spring compresses the steel ball in one groove, the contact pushing block maintains the upper station or the lower station unchanged.

Further, the steering hook is rotationally connected with the shell, the pull rod assembly is transversely arranged, the button rod assembly is vertically arranged, the steering hook is arranged between the pull rod assembly and the button rod assembly, and when the pull rod assembly transversely moves, the steering hook is driven to enable the button rod assembly to vertically move.

Further, the steering hook comprises a transverse support arm and a vertical support arm, wherein the transverse support arm is vertically connected with the vertical support arm, and the intersection point is rotatably arranged on the shell.

Further, the pull rod assembly comprises a pull rod and a pull ring connected to one end of the pull rod extending out of the shell, a reset spring is sleeved on the outer side of the pull rod, one end of the reset spring abuts against a convex ring on the circumferential end face of the pull rod assembly, and the other end of the reset spring abuts against the inner side of the shell.

Further, one end of the pull rod, which is located in the shell, is provided with a vertical through hole, the vertical support arm stretches into the through hole, the through hole is a long hole, and the transverse length of the long hole exceeds that of the vertical support arm.

Further, a horizontal baffle is arranged at the bottom end of the connecting rod, and one end of the transverse support arm, which is far away from the vertical support arm, is positioned between the contact pushing block and the baffle.

Further, a dustproof sealing ring is arranged between the circumferential end face, close to one end of the button, of the connecting rod and the shell.

After the technical scheme is adopted, the utility model has the beneficial effects that:

the optical fiber pull switch comprises a shell, wherein a button rod assembly, a pull rod assembly, a contact pushing block and an optical fiber micro switch are arranged in the shell, the button rod assembly and the pull rod assembly drive the contact pushing block to move when moving axially, the optical fiber micro switch is positioned at one side of the contact pushing block and pushes a trigger rod of the optical fiber micro switch when the contact pushing block moves, one end part of the button rod assembly and/or the pull rod assembly extends out of the shell, a mechanical action signal input by the button assembly and/or the pull rod assembly can be mapped into an optical signal, the optical signal is transmitted through an optical fiber, the optical signal in an optical fiber connected with the optical fiber micro switch can be read through a rear optical modem, the signal can be demodulated for rear control use, or an alarm signal can be directly sent out, the optical fiber micro switch with different wavelength specifications can be connected with an optical fiber core and positioned at each switch position, the problems of signal crosstalk and electromagnetic interference do not exist, the problems of fault and communication quality do not exist, the problems caused by leakage current, the temperature and the oxidation of a connector are solved, the optical fiber pull switch has extremely high service life, the stability, the reliability, the optical fiber pull switch is high, the safety is high, the optical fiber pull switch can be used in the field, the field explosion proof condition does not need to supply power, and the power supply beyond the power supply distance.

Drawings

FIG. 1 is a schematic diagram of the structure of the fiber pull-cord switch of the present utility model;

FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;

FIG. 3 is a B-B cross-sectional view of FIG. 2;

FIG. 4 is a schematic diagram of the structure of a fiber micro switch;

in the figure, 10-shell, 11-steering hook, 20-button rod assembly, 21-button, 22-connecting rod, 23-dustproof sealing ring, 24-groove, 25-contact pushing block, 26-baffle, 30-pull rod assembly, 31-pull rod, 32-through hole, 33-reset spring, 34-pull ring, 40-station holding assembly, 41-set screw, 42-holding spring, 43-steel ball, 50-optical fiber micro switch, 51-shell, 52-trigger rod, 53-leaf spring, 54-optical fiber, 55-Bragg grating and 56-optical fiber connection port.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings and examples, in which preferred embodiments of the utility model are shown, and in which the description of the text parts of the description is supplemented with figures, so that a person can intuitively and intuitively understand each technical feature and overall technical solution of the utility model, but does not understand the limitation of the protection scope of the utility model.

In the description of the present specification, it should be understood that the direction or positional relationship indicated in reference to the description of the orientation, such as upper, lower, front, rear, left, right, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present specification, words such as "a number" and "an" mean one or more. The meaning of "a plurality of" means at least two, e.g., two, three, etc., unless specifically defined otherwise. Greater than, less than, greater than, etc. are understood to exclude this number, and above, below, within, etc. are understood to include this number. Unless otherwise specifically defined, the terms "disposed," "mounted," "connected," and the like are to be construed broadly and as such, one of ordinary skill in the art will be able to ascertain the specific meaning of the terms in the present utility model, with the specific details of the technical solution.

As shown in fig. 1, 2 and 3 together, an optical fiber pull-cord switch comprises a housing 10, wherein a push-button rod assembly 20, a pull rod assembly 30, a contact push block 25 and an optical fiber micro-switch 50 are arranged in the housing 10. The push button rod assembly 20 and the pull rod assembly 30 drive the contact pushing block 25 to move when axially moving, the optical fiber micro switch 50 is positioned on one side of the contact pushing block 25, and the trigger rod 52 of the optical fiber micro switch 50 is pushed when the contact pushing block 25 moves, and one end part of the push button rod assembly 20 and/or the pull rod assembly 30 extends out of the shell 10. In this embodiment, two pull rod assemblies 30 are disposed on two sides of the push button rod assembly 20, and ends of the push button rod assembly 20 extend out of two sides of the housing 10.

As shown in fig. 3, the button bar assembly 20 includes a link 22 and a button 21 protruding from the housing 10, a contact pushing block 25 is fixed to the link 22, and the contact pushing block 25 is mechanically coupled to the link 22 as one body. The peripheral surface of the contact pushing block 25 is a conical surface, the diameter of one end of the conical surface, which is close to the optical fiber micro switch 50, is smaller than the diameter of one end, which is far away from the optical fiber micro switch 50, and when the contact pushing block 25 moves along with the button rod assembly 20 towards the optical fiber micro switch 50, the conical surface of the contact pushing block 25 presses the trigger rod 52 of the optical fiber micro switch 50, so that the trigger rod 52 acts, and the optical fiber micro switch 50 sends an action signal.

As shown in fig. 2 and 3 together, a station keeping component 40 is also provided in the housing 10, and the station keeping component 40 cooperates with a structure on the connecting rod 22 to make the contact pushing block 25 be at an upper station where it is not actuated or at a lower station where the optical fiber micro switch 50 is pressed to trigger the lever 52. Specifically, two grooves 24 are formed in the circumferential end face of the connecting rod 22, a plurality of mounting holes are formed in the shell 10 along the radial direction of the connecting rod 22, a retaining spring 42 and a steel ball 43 are arranged in the mounting holes, and when the steel ball 43 is pressed into one of the grooves 24 by the retaining spring 42 through compression of the retaining screw 41, the contact pushing block 25 maintains the upper station or the lower station unchanged. When a plurality of mounting holes are provided, the plurality of mounting holes are uniformly distributed on the circumferential side of the link 22 at the same height, and the holding spring 42, the steel ball 43 and the set screw 41 are respectively mounted in each mounting hole.

As shown in fig. 2, the steering hook 11 is rotatably connected to the casing 10, the pull rod assembly 30 is transversely arranged, the button rod assembly 20 is vertically arranged, the steering hook 11 is arranged between the pull rod assembly 30 and the button rod assembly 20, and when the pull rod assembly 30 transversely moves, the steering hook 11 is driven to vertically move the button rod assembly 20. Specifically, the steering hook 11 includes a transverse arm and a vertical arm, which are vertically connected, and the intersection point of the transverse arm and the vertical arm is rotatably mounted on the housing 10.

As shown in fig. 1, 2 and 3 together, the pull rod assembly 30 includes a pull rod 31 and a pull ring 34 connected to one end of the pull rod 31 extending out of the housing 10, a vertical through hole 32 is provided at one end of the pull rod 31 located in the housing 10, a vertical arm extends into the through hole 32, a horizontal baffle 26 is provided at the bottom end of the connecting rod 22, and one end of the horizontal arm away from the vertical arm is located between the contact pushing block 25 and the baffle 26. The pull ring 34 is connected with an emergency pull rope, and the pull rod 31 moves outwards to drive the steering hook 11 to rotate by pulling the emergency pull rope, so that the connecting rod 22 moves downwards, the contact pushing block 25 moves downwards, the upper station enters the lower station, and the optical fiber micro switch 50 sends out an action signal.

As shown in fig. 1, the outside of the pull rod 31 is sleeved with a return spring 33, one end of the return spring 33 abuts against a convex ring of the periphery Xiang Duanmian of the pull rod assembly 30, and the other end abuts against the inside of the housing 10. When the pulling force of the pull ring 34 is removed, the pull rod assembly 30 is restored to the state shown in the drawing due to the spring force of the return spring 33.

As shown in fig. 2, the through hole 32 on the pull rod 31 is an elongated hole, the transverse length of the elongated hole exceeds the transverse length of the vertical support arm, that is, after the pull rod assembly 30 is reset, the steering hook 11 is not forcibly reset due to the fact that the through hole 32 is longer in the transverse direction, so that the pull rod 31 and the contact pushing block 25 are in a lower station state and are unchanged, and the optical fiber micro switch 50 always sends out an action signal until a user manually pulls the button 21 of the button rod assembly 20 upwards to an upper station state.

As shown in fig. 2 and 3 together, a dust-proof sealing ring 23 is arranged between the circumferential end surface of the connecting rod 22 near one end of the button 21 and the housing 10, so as to prevent external dust and water from entering the interior of the housing 10, and damage to internal components is caused.

As shown in fig. 4, the optical fiber micro switch 50 includes a trigger lever 52, an optical fiber 54 and a plate spring 53 which are disposed in a housing 51, a bragg grating 55 is disposed at a portion of the optical fiber 54 fixed to the surface of the plate spring 53, one end of the plate spring 53 is fixed to the housing 51, one end of the trigger lever 52 protrudes out of the housing 51 and pushes the other end of the plate spring 53 to deform the plate spring 53 when moving axially, both ends of the optical fiber 54 protrude out of the housing 51 and are respectively connected with an optical fiber connection port 56, and both the housing 51 and the optical fiber connection port 56 of the optical fiber micro switch 50 are fixed in the housing 10. After the trigger rod 52 is pushed to trigger, the plate spring 53 deforms to change the grid distance of the Bragg grating 55, so that the wavelength of the refraction signal is offset to a certain extent, and the rear-end optical modem can read the offset and demodulate the signal to be used for rear control or directly send out an alarm signal. And, the optical fiber micro-switches 50 with different wavelength specifications can be adopted to realize the connection and the positioning of a plurality of optical fiber micro-switches 50 in one optical fiber core.

According to the optical fiber pull switch, the push button rod assembly, the pull rod assembly, the contact pushing block and the optical fiber micro switch are arranged in the shell, when the push button rod assembly and the pull rod assembly move axially, the contact pushing block is driven to move to trigger the optical fiber micro switch, the optical fiber is used as a medium to directly transmit a switch signal to realize the signal and position detection of the pull switch, the signal crosstalk and the electromagnetic interference are avoided, the lightning stroke is prevented, the problems of faults and communication quality caused by leakage current, temperature and joint oxidation are avoided, the service life and the stability are extremely high, the reliability and the weather resistance are realized, the power supply is not needed on site, and the power supply problem of an ultra-long distance is avoided.

While the foregoing describes specific embodiments of the present utility model, those skilled in the art will appreciate that the described embodiments are merely a partial, rather than an entire, embodiment of the present utility model, and that the scope of the present utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, without departing from the spirit and scope of the utility model.

Claims (10)

1. The utility model provides an optical fiber pull switch, includes the casing, its characterized in that is provided with button pole subassembly, pull rod subassembly, contact pushing block and optical fiber micro-gap switch in the casing, button pole subassembly with the pull rod subassembly drives when carrying out axial displacement the contact pushing block removes, optical fiber micro-gap switch is located one side of contact pushing block just the contact pushing block promotes when removing optical fiber micro-gap switch's trigger lever, button pole subassembly and/or the one end tip of pull rod subassembly stretches out the casing.

2. The fiber optic pull-cord switch of claim 1, wherein the push-button lever assembly comprises a connecting rod and a push button extending out of the housing, the contact pushing block is fixed to the connecting rod, the circumferential surface of the contact pushing block is a conical surface, and the diameter of the conical surface near one end of the fiber optic microswitch is smaller than the diameter of the end far from the fiber optic microswitch.

3. The fiber optic pull switch of claim 2, wherein a station retention assembly is further disposed within the housing, the station retention assembly cooperating with structure on the link to cause the contact push block to be in an inactive upper position or to press against a lower position of the fiber optic microswitch trigger lever.

4. The optical fiber pull-cord switch according to claim 3, wherein two grooves are formed in the circumferential end face of the connecting rod, a plurality of mounting holes are formed in the shell along the radial direction of the connecting rod, a retaining spring and a steel ball are arranged in the mounting holes, and when the retaining spring presses the steel ball to one of the grooves, the contact pushing block maintains the upper station or the lower station unchanged.

5. The fiber optic draw switch of claim 2 wherein said housing is rotatably connected with a steering hook, said pull rod assembly is disposed laterally, said push button rod assembly is disposed vertically, said steering hook is disposed between said pull rod assembly and said push button rod assembly, and said push button rod assembly is vertically movable by said steering hook upon lateral movement of said pull rod assembly.

6. The fiber optic pull-cord switch of claim 5, wherein the steering hook comprises a transverse arm and a vertical arm, the transverse arm and the vertical arm being vertically connected and rotatably mounted to the housing at an intersection.

7. The fiber optic pull-cord switch of claim 6, wherein the pull-cord assembly comprises a pull-cord and a pull-tab connected to one end of the pull-cord extending out of the housing, wherein a return spring is sleeved on the outside of the pull-cord, one end of the return spring being biased against a collar on the circumferential end surface of the pull-cord assembly, and the other end being biased against the inside of the housing.

8. The fiber optic pull-cord switch of claim 7, wherein the end of the pull rod in the housing is provided with a vertical through hole, the vertical arm extends into the through hole, the through hole is an elongated hole, and the transverse length of the elongated hole exceeds the transverse length of the vertical arm.

9. The fiber optic pull-switch of claim 6, wherein a horizontal baffle is provided at a bottom end of the link, and an end of the transverse arm remote from the vertical arm is positioned between the contact push block and the baffle.

10. A fiber optic pull switch as claimed in any one of claims 2 to 9, wherein a dust seal is provided between a circumferential end face of the link adjacent one end of the push button and the housing.