Pull switch with state indication function

Abstract

The utility model discloses a pull-cord switch with state indication, and relates to the technical field of pull-cord switch signal indication. The indicating device comprises the indicating device, the indicating device is installed in the two-way pull-cord switch, when the indicating device operates normally, a swing arm of the two-way pull-cord switch is in a normal state, a photoelectric sensing switch receives diffuse reflection signals through a diffuse reflection plate, and an emitted light source serves as an indicating signal lamp through a light-transmitting mirror; the linkage blocking piece which is coaxially arranged with the swing arm rotates to block the photoelectric induction switch, so that the photoelectric induction switch cannot receive diffuse reflection signals through the diffuse reflection plate, the light transmitting mirror does not have the display of a signal indicating lamp, the pull rope switch acts immediately, and through the arranged diffuse reflection plate, the functions of light diffuse reflection and light spot gathering signal indication are achieved; no additional light source is needed, signal indication is visually monitored through the light transmitting mirror, and the state of the pull rope switch can be easily indicated.

Description

Technical Field

[0001] The utility model relates to the technical field of pull - rope switch signal indication, and particularly relates to a pull - rope switch with status indication. Background Art

[0002] In the industrial production of some industries such as thermal power, mines, electric power, and chemical industries, materials are transported through conveyor belts in the transmission system. Due to the long length of the conveyor belt transmission line, to prevent equipment operation from being stopped in a timely manner in case of an accident, a plurality of two - way pull - rope switches are arranged on both sides of the belt conveyor along the way for emergency shutdown.

[0003] The currently used two - way pull - rope switches have no indication of the pull - rope signal action. After accidental touch, on - site operators often need to check and reset one by one, resulting in a large workload. Summary of the Utility Model

[0004] Aiming at the above - mentioned technical problems, the utility model provides a pull - rope switch with status indication, which is used to solve the problems that the existing two - way pull - rope switch has no indication of the pull - rope signal action and requires one - by - one check and reset after accidental touch, resulting in a large workload.

[0005] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A pull - rope switch with status indication includes an indicating device. The indicating device is installed inside the two - way pull - rope switch. The indicating device is composed of a light - transmitting mirror, a diffuse reflection plate, and a photoelectric induction switch. The light - transmitting mirror is arranged on the front cover of the two - way pull - rope switch. The diffuse reflection plate is arranged inside the front cover of the two - way pull - rope switch. The photoelectric induction switch is arranged on the rear cover of the two - way pull - rope switch. The photoelectric induction switch is connected to the internal power supply of the two - way pull - rope switch. The light - transmitting mirror and the diffuse reflection plate are on the optical path of the photoelectric induction switch. A linkage tab is coaxially arranged with the swing arm inside the two - way pull - rope switch. There is an angle β between the linkage tab and the swing arm. When one end of the swing arm rotates to the position of the positioning hole, the linkage tab rotates synchronously to block the optical path of the photoelectric induction switch.

[0007] Further, there are two indicating devices, and the two indicating devices are symmetrically arranged on both sides of the swing - arm rotating shaft.

[0008] Further, the angle range of the angle β between the linkage tab and the swing arm is 0° < β < 90°.

[0009] Further, it also includes a positioning pin. A reset block is movably arranged on the swing arm. A limiting pit corresponding to the reset block is arranged on the front cover of the two - way pull - rope switch. One end of the positioning pin is connected to the reset block. A spring is arranged between the positioning pin and the swing arm. The other end of the positioning pin is arranged in the limiting pit.

[0010] Furthermore, the two-way pull rope switch is installed on a fixed base. A ramp surface is provided at the part of the fixed base that cooperates with the two-way pull rope switch. A cut hole is provided at the bottom of the rear end cover of the two-way pull rope switch, and the diameter of the cut hole is adapted to the ramp surface on the fixed base.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. During normal operation, the swing arm of the two-way pull rope switch is in a normal state. The photoelectric induction switch receives the diffuse reflection signal through the diffuse reflection plate, and the emitted light source passes through the light transmission mirror as an indicator signal lamp. When the pull rope pulls the swing arm, the swing arm rotates, and the linkage baffle arranged coaxially with the swing arm rotates and acts to block the photoelectric induction switch, causing the photoelectric induction switch to be unable to receive the diffuse reflection signal through the diffuse reflection plate, and there is no signal indicator display on the light transmission mirror. The pull rope switch then acts. By providing the diffuse reflection plate, it has both the functions of light diffuse reflection and spot aggregation signal indication. There is no need to additionally set a light source, and the signal indication can be intuitively monitored through the light transmission mirror, which can easily indicate the state of the pull rope switch, solving the problem that the existing two-way pull rope switch has no pull rope signal action indication, and after accidental touch, it is necessary to check and reset one by one, resulting in a large workload.

[0013] 2. The two indicating devices are symmetrically arranged. The action of a single photoelectric induction switch can trigger the action of the pull rope switch. The action is stable and sensitive, and it will not be accidentally triggered due to the gravity of the long-distance pull rope, with high stability.

[0014] 3. The included angle between the linkage baffle and the swing arm is set according to the position of the indicating device to ensure that after the pull rope pulls the swing arm to rotate, the linkage baffle can accurately block the photoelectric induction switch.

[0015] 4. When there is a large amount of dust at the operation site, the dust entering the two-way pull rope switch can slide down along the ramp surface of the fixed base through the cut hole of the rear end cover, avoiding accumulation inside the two-way pull rope switch and affecting the normal operation of the equipment. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is a schematic external structure diagram of the front end cover in the structure of the present utility model;

[0018] Figure 3 is a schematic internal structure diagram of the front end cover in the structure of the present utility model;

[0019] Figure 4 is a schematic external structure diagram of the rear end cover in the structure of the present utility model;

[0020] Figure 5 is a schematic internal structure diagram of the rear end cover in the structure of the present utility model.

[0021] In the figure:

[0022] 1. Diffuse reflection plate; 2. Photoelectric induction switch; 3. Front end cover; 4. Rear end cover; 5. Swing arm; 6. Linkage flap; 7. Positioning pin; 8. Reset block; 9. Limit pit; 10. Fixed base; 11. Cutting hole; 12. Transparent lens; 13. Pull rope fixing hole; 14. Limit block; 15. Positioning hole. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with the specific implementation manners and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present utility model. In addition, in the following descriptions, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0024] A pull rope switch with status indication includes an indicating device. The indicating device is installed inside the two-way pull rope switch. The indicating device is composed of a transparent lens 12, a diffuse reflection plate 1 and a photoelectric induction switch 2. The transparent lens 12 is arranged on the front end cover 3 of the two-way pull rope switch. The diffuse reflection plate 1 is arranged inside the front end cover 3 of the two-way pull rope switch. The photoelectric induction switch 2 is arranged on the rear end cover 4 of the two-way pull rope switch. The photoelectric induction switch 2 is connected to the internal power supply of the two-way pull rope switch. The transparent lens 12, the diffuse reflection plate 1 and the photoelectric induction switch 2 are all arranged coaxially. A linkage flap 6 is arranged coaxially with the swing arm 5 inside the two-way pull rope switch. There is an included angle β between the linkage flap 6 and the swing arm 5. When one end of the swing arm 5 rotates to the position of the positioning hole 15, the linkage flap 6 rotates synchronously and is placed directly above the photoelectric induction switch 2. During normal operation, the swing arm 5 of the two-way pull rope switch is in a normal state. The photoelectric induction switch 2 receives the diffuse reflection signal through the diffuse reflection plate 1, and emits light through the transparent lens 12 as an indicating signal lamp. When the pull rope pulls the swing arm 5, the swing arm 5 rotates, and the linkage flap arranged coaxially with the swing arm 5 rotates, blocking the photoelectric induction switch 2, so that the photoelectric induction switch 2 cannot receive the diffuse reflection signal through the diffuse reflection plate 1, and there is no signal indicating lamp display on the transparent lens 12. The pull rope switch then acts. By setting the diffuse reflection plate 1, it has both the functions of light diffuse reflection and spot aggregation signal indication, without the need to additionally set a light source. The signal indication can be intuitively monitored through the transparent lens 12, and the state of the pull rope switch can be easily indicated, solving the problem that the existing two-way pull rope switch has no indication of the pull rope signal action, and a large amount of work is required to check and reset one by one after accidental touch.

[0025] There are two said indicating devices, and the two indicating devices are symmetrically arranged on both sides of the rotating shaft of the swing arm 5. The two indicating devices are symmetrically arranged. The action of a single photoelectric induction switch 2 can trigger the action of the pull rope switch. The action is stable and sensitive, and it will not be accidentally triggered due to the gravity of the long-distance pull rope, and the stability is high.

[0026] The angular range of the included angle β between the linkage flap 6 and the swing arm 5 is 0° < β < 90°. The included angle between the linkage flap 6 and the swing arm 5 is set according to the position of the indicating device to ensure that after the pull rope pulls the swing arm 5 to rotate, the linkage flap 6 can accurately block the photoelectric induction switch 2.

[0027] It further includes a positioning pin 7. A reset block 8 is movably arranged on the swing arm 5. A limiting pit 9 is arranged on the front end cover 3 of the two-way pull rope switch corresponding to the position of the reset block 8. One end of the positioning pin 7 is connected to the reset block 8 of the swing arm 5. A spring is arranged between the positioning pin 7 and the swing arm 5. The other end of the positioning pin 7 is arranged in the limiting pit 9 to limit the swing arm and avoid misoperation of the swing arm in the on-site working environment.

[0028] The two-way pull rope switch is installed on the fixed base 10. A ramp surface is arranged on the part of the fixed base 10 that cooperates with the two-way pull rope switch. A cut hole 11 is arranged at the bottom of the rear end cover 4 of the two-way pull rope switch. The diameter of the cut hole 11 is adapted to the ramp surface on the fixed base 10. When the dust is relatively large at the operation site, the dust entering the two-way pull rope switch can slide down along the ramp surface of the fixed base 10 through the cut hole 11 of the rear end cover 4, avoiding accumulation in the two-way pull rope switch and affecting the normal operation of the equipment.

[0029] Embodiment

[0030] During normal use, the front end cover 3 can be firmly installed on the equipment frame. The pull rope fixing holes 13 at the upper and lower ends of the swing arm 5 are used to connect the pull ropes at both ends, and then the rear end cover 4 is firmly installed. At this time, the swing arm 5 is in a vertical state under the action of the limiting block 14. During normal operation, the photoelectric induction switch 2 receives the diffuse reflection signal through the diffuse reflection plate 1, and the emitted light source passes through the light transmission mirror 12 as an indicating signal lamp to indicate that the equipment is operating normally; the pull rope is installed in the pull rope fixing hole 13, and the swing arm 5 is pulled by the pull rope. The swing arm positioning pin 7 arranged at the upper part of the front end of the swing arm 5 pops out and enters the positioning hole 15. When the pull rope pulls the swing arm 5, the swing arm 5 rotates, and the linkage flap arranged coaxially with the swing arm 5 rotates and blocks the photoelectric induction switch 2, causing the photoelectric induction switch 2 to be unable to receive the diffuse reflection signal through the diffuse reflection plate 1, and there is no signal indicator display on the light transmission mirror 12, and the pull rope switch immediately acts; during reset, the reset block 8 at the upper part of the front end of the swing arm 5 is pulled forward, the swing arm positioning pin 7 is pulled out of the positioning hole 15, and the swing arm 5 can automatically return to the normal position under the action of the reset spring, driving the linkage flap coaxially with the swing arm 5 to rotate, thereby restoring the normal working state of the pull rope switch.

[0031] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pull-cord switch with status indication, characterized in that: The invention comprises an indicating device, which is installed in a two-way pull-wire switch. The indicating device comprises a light-transmitting mirror (12), a diffuse reflection plate (1) and a photoelectric induction switch (2). The light-transmitting mirror (12) is arranged on a front end cover (3) of the two-way pull-wire switch, the diffuse reflection plate (1) is arranged inside the front end cover (3) of the two-way pull-wire switch, the photoelectric induction switch (2) is arranged on a rear end cover (4) of the two-way pull-wire switch, the photoelectric induction switch (2) is connected to an internal power supply of the two-way pull-wire switch, the light-transmitting mirror (12) and the diffuse reflection plate (1) are on the optical path of the photoelectric induction switch (2), a linkage baffle (6) is coaxially arranged with a swing arm (5) in the two-way pull-wire switch, an angle β is formed between the linkage baffle (6) and the swing arm (5), and when one end of the swing arm (5) rotates to the position of the positioning hole (15), the linkage baffle (6) rotates synchronously to block the optical path of the photoelectric induction switch (2).

2. A pull-cord switch with status indication according to claim 1, characterized in that: There are two indicating devices, which are symmetrically arranged on both sides of the rotating shaft of the swing arm (5).

3. A pull-cord switch with status indication according to claim 1, characterized in that: The angle β between the linkage gear piece (6) and the swing arm (5) is in the range of 0°<β<90°.

4. A pull-cord switch with status indication according to claim 3, characterized in that: It also includes a positioning pin (7), a reset block (8) movably provided on the swing arm (5), a limiting pit (9) corresponding to the reset block (8) is provided on the front end cover (3) of the two-way pull rope switch, one end of the positioning pin (7) is connected to the reset block (8), a spring is provided between the positioning pin (7) and the swing arm (5), and the other end of the positioning pin (7) is arranged in the limiting pit (9).

5. A pull-cord switch with status indication according to claim 4, characterized in that: The two-way pull-wire switch is mounted on a fixed base (10); a sloped surface is provided on the portion of the fixed base (10) that matches the two-way pull-wire switch; a cut-out hole (11) is provided on the bottom of a rear end cover (4) of the two-way pull-wire switch; and a diameter of the cut-out hole (11) matches the sloped surface on the fixed base (10).

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