Safety light curtain sensor

Abstract

The utility model discloses a safe light curtain sensor, and belongs to the field of light curtain sensors. A safety light curtain sensor comprises a machine shell and a scanning end installed in the machine shell, supports are fixedly connected to the two sides of the front face and the two sides of the back face of the machine shell, supporting frames are movably connected to the inner sides of the supports through pin shafts, and elastic plates are fixedly connected to the outer sides of the supporting frames. The side, away from the supporting frame, of the elastic plate extends to the outer side of the machine shell and makes contact with the surface of the machine shell, the elastic plate can elastically support the supporting frame, and the supporting frame can swing with the pin shaft in the support as the axis and extrude the elastic plate to deform and contract when subjected to external extrusion. According to the utility model, the support and the support frame are arranged on the front surface and the back surface of the casing, so that the protection area of the light curtain sensor is increased, the protection capability of external collision is improved, and the design of the elastic plate enables the support frame to elastically deform and absorb impact force when the support frame is subjected to external extrusion, thereby protecting internal elements of the light curtain sensor from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of light curtain sensors, in particular to a safety light curtain sensor. Background Art

[0002] The light curtain sensor emits infrared rays to form a protective light curtain consisting of one or more light beams. When these light beams are blocked by objects, the light curtain sensor will immediately send a signal to control the potentially dangerous mechanical equipment to stop working, thereby avoiding the occurrence of safety accidents. Its working principle is based on infrared emission and reception technology. When the modulated signal (light signal) emitted by the infrared transmitting tube is blocked by an object and cannot reach the infrared receiving tube smoothly, the corresponding internal circuit will output a high-level signal to trigger the safety protection mechanism.

[0003] For example, the patent application number disclosed on the China Patent Network is: 202122506625.3, and the patent name is: A safety light curtain sensor, comprising a light curtain sensor body, wherein a protective box is provided on the outside of the light curtain sensor body. The utility model sets a fixed plate, and only needs to press the slider, and the slider moves through the slide groove to push the two sets of slides to move. The movement of the two sets of slides drives the two sets of fixed plates to move, and then the light curtain sensor body is placed on the inside of the protective box. At this time, the light curtain sensor body is between the two sets of fixed plates. Release the slider, and the second spring pushes the slider to move until the slider is aligned with the slide groove. The first spring will push the fixed plate to move. At this time, the two sets of fixed plates clamp the light curtain sensor body. At this time, the protective box plays a protective role on the outside of the light curtain sensor body, which greatly reduces the damage to the light curtain sensor body caused by collision, improves the service life of the light curtain sensor body, and increases the practicality and functionality of the device.

[0004] However, the structure of the existing light curtain sensor is relatively simple, and it is mainly protected by a protective cover set on the outside. Although the protective cover can protect the light curtain sensor from direct contact with external objects to a certain extent, when the protective cover is hit, the impact force will still be quickly transmitted to the light curtain sensor itself. The impact force causes the internal components of the light curtain sensor to loosen, thereby affecting its normal operation. Moreover, under strong collision or impact, the protective cover itself may be damaged, such as deformation, cracking, etc., not only failing to continue to protect the light curtain sensor, but also causing additional safety hazards due to flying debris. Utility Model Content

[0005] The purpose of the utility model is to solve the problem of limited protection effect of the shielding protection mode in the prior art, and to propose a safety light curtain sensor.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A safety light curtain sensor includes a housing;

[0008] A scanning terminal installed inside the housing;

[0009] Both sides of the front and back of the casing are fixedly connected with brackets, the inner side of the bracket is movably connected to a support frame through a pin shaft, the outer side of the support frame is fixedly connected with a spring plate, the spring plate extends to the outside of the casing away from the side of the support frame and contacts the surface of the casing, the spring plate can elastically support the support frame, and when the support frame is subjected to external extrusion, it can swing around the pin shaft inside the bracket as the axis and squeeze the spring plate to deform and shrink. A transmission structure is provided at the bottom of the casing, and the transmission structure can control the swing adjustment of multiple support frames.

[0010] As the preferred technical solution of the present application, the transmission structure includes a connecting frame fixedly connected to the bottom of the casing, the interior of the connecting frame is movably connected with a bidirectional screw through a bearing, both sides of the surface of the bidirectional screw are threadedly connected with screw sleeves, the support frame is fixedly connected to a force-bearing plate on the side close to the bracket, the top of the screw sleeve is fixedly connected to a pressure rod located on the inner side of the force-bearing plate, the outer surface of the pressure rod can contact the inner side of the force-bearing plate, and the pressure rod can be used to squeeze the force-bearing plate during the process of the screw sleeve moving outward to adjust the swing angle of the cover support frame.

[0011] As a preferred technical solution of the present application, a rubber sleeve is provided on the surface of the pressure rod, an outer surface of the rubber sleeve contacts the surface of the force-bearing plate, and the rubber sleeve is elastic.

[0012] As a preferred technical solution of this application, a corner plate is fixedly connected to the outer side of the load-bearing plate, and the side of the corner plate away from the load-bearing plate is fixedly connected to the surface of the support frame. The corner plate can support and connect the support frame and the load-bearing plate.

[0013] As a preferred technical solution of the present application, an extension plate is fixedly connected to the side of the support frame away from the bracket, and an elastic roller is movably connected to the side of the extension plate away from the support frame via a pin.

[0014] As a preferred technical solution of the present application, both sides of the connection frame are fixedly connected to limit rods, the limit rods are located on both sides of the bidirectional screw, and the screw sleeves are sleeved on the surface of the limit rods and slidably connected to the limit rods.

[0015] As a preferred technical solution of the present application, one end of the bidirectional screw passes through the connecting frame and extends to the outside of the connecting frame, and the end of the bidirectional screw located outside the connecting frame is fixedly connected to a rotating wheel.

[0016] Compared with the existing technology, the present invention provides a safety light curtain sensor with the following beneficial effects:

[0017] 1. This safety light curtain sensor increases the protection area of ​​the light curtain sensor and improves its protection against external collisions by setting brackets and support frames on the front and back of the casing. The design of the spring plate enables the support frame to elastically deform when subjected to external extrusion, absorbing the impact force and protecting the internal components of the light curtain sensor from damage.

[0018] 2. The safety light curtain sensor, through the design of the transmission structure, can adjust the position of the screw sleeve by rotating the bidirectional screw, and then control the swing angle of the support frame by squeezing the force plate through the pressure rod, providing precise control of the swing angle of the support frame, and can adjust the protection range according to actual needs. Through the cooperation of the bidirectional screw and the screw sleeve, the synchronous adjustment of multiple support frames is realized, which improves the adjustment efficiency and accuracy.

[0019] 3. The safety light curtain sensor increases the contact area between the pressure rod and the load-bearing plate through the design of the rubber sleeve, thereby improving the stability and reliability of the transmission. The elastic characteristics of the rubber sleeve can further absorb the impact force, protect the load-bearing plate from damage, and extend the service life of the light curtain sensor.

[0020] 4. The safety light curtain sensor increases the connection strength between the load-bearing plate and the support frame through the design of the angle plate, thereby improving the stability and load-bearing capacity of the structure. The existence of the angle plate makes the connection between the load-bearing plate and the support frame more secure, reducing the possibility of structural deformation and damage caused by external collisions.

[0021] 5. The safety light curtain sensor further increases the protection range of the light curtain sensor through the design of the extension plate and elastic roller, so that the sensor can provide effective protection even when it suffers a side collision. The rolling characteristics of the elastic roller can reduce the impact force during the collision and protect the light curtain sensor from damage.

[0022] 6. The safety light curtain sensor limits the movement of the screw sleeve through the design of the limit rod, preventing the screw sleeve from deflecting or falling off during movement, improving the stability and reliability of the transmission. The sliding connection between the screw sleeve and the limit rod makes the screw sleeve more stable during movement, reducing wear and noise caused by friction.

[0023] 7. The safety light curtain sensor, through the design of the rotary wheel, allows the bidirectional screw to be rotated manually or electrically, realizing remote control of the transmission structure and improving the convenience and flexibility of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of the utility model;

[0025] Figure 2 This is a schematic diagram of the top structure of the utility model;

[0026] Figure 3 It is a left side schematic diagram of the local structure of the utility model;

[0027] Figure 4 This is a schematic diagram of the partial structure separation of the present invention.

[0028] In the figure: 1. Housing; 2. Scanning end; 3. Bracket; 4. Support frame; 5. Spring plate; 6. Transmission structure; 7. Connecting frame; 8. Bidirectional screw; 9. Screw sleeve; 10. Force plate; 11. Pressure rod; 12. Rubber sleeve; 13. Angle plate; 14. Extension plate; 15. Elastic roller; 16. Limit rod; 17. Rotating wheel. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Example

[0030] Reference Figure 1-4 , a safety light curtain sensor, comprising a housing 1;

[0031] A scanning terminal 2 is installed inside the housing 1;

[0032] The front and back sides of the casing 1 are fixedly connected with brackets 3, the inner side of the bracket 3 is movably connected with a support frame 4 through a pin shaft, and the outer side of the support frame 4 is fixedly connected with a spring plate 5, which extends to the outside of the casing 1 away from the side of the support frame 4 and contacts the surface of the casing 1. The spring plate 5 can elastically support the support frame 4. When the support frame 4 is subjected to external extrusion, it can swing around the pin shaft inside the bracket 3 as the axis and squeeze the spring plate 5 to deform and shrink. A transmission structure 6 is provided at the bottom of the casing 1. The transmission structure 6 can control the swing adjustment of multiple support frames 4. The front and back of the shell 1 are provided with a bracket 3 and a support frame 4, which increases the protection area of ​​the light curtain sensor and improves the protection capability against external collisions. The design of the spring plate 5 enables the support frame 4 to be elastically deformed when subjected to external extrusion, absorbs the impact force, and protects the internal components of the light curtain sensor from damage. The transmission structure 6 includes a connecting frame 7 fixedly connected to the bottom of the shell 1, and the interior of the connecting frame 7 is movably connected to a bidirectional screw 8 through a bearing. Both sides of the surface of the bidirectional screw 8 are threadedly connected with a screw sleeve 9. The side of the support frame 4 close to the bracket 3 is fixedly connected to a force plate 10, and the screw sleeve 9 is fixedly connected to the support frame 4. The top of the sleeve 9 is fixedly connected with a pressure rod 11 located on the inner side of the force-bearing plate 10. The outer surface of the pressure rod 11 can contact the inner side of the force-bearing plate 10. During the movement of the screw sleeve 9 to the outside, the pressure rod 11 can be used to squeeze the force-bearing plate 10 to adjust the swing angle of the cover support frame 4. The surface of the pressure rod 11 is covered with a rubber sleeve 12. The outer surface of the rubber sleeve 12 contacts the surface of the force-bearing plate 10. The rubber sleeve 12 is elastic. The outer side of the force-bearing plate 10 is fixedly connected with an angle plate 13. The side of the angle plate 13 away from the force-bearing plate 10 is fixedly connected to the surface of the support frame 4. The angle plate 13 can The support frame 4 and the force-bearing plate 10 are supported and connected. The side of the support frame 4 away from the bracket 3 is fixedly connected to an extension plate 14. The side of the extension plate 14 away from the support frame 4 is movably connected to an elastic roller 15 through a pin shaft. Both sides of the inside of the connecting frame 7 are fixedly connected to the limiting rod 16. The limiting rod 16 is located on both sides of the bidirectional screw 8. The screw sleeve 9 is sleeved on the surface of the limiting rod 16 and is slidably connected to the limiting rod 16. One end of the bidirectional screw 8 passes through the connecting frame 7 and extends to the outside of the connecting frame 7. The end of the bidirectional screw 8 located outside the connecting frame 7 is fixedly connected to a rotating wheel 17.

[0033] Specifically, when the safety light curtain sensor is in operation / use: The safety light curtain sensor primarily consists of a housing 1, a scanning end 2, a bracket 3, a support frame 4, a spring plate 5, and a transmission structure 6. The housing 1 serves as the main structure, housing the scanning end 2 for transmitting and receiving infrared light beams to form a protective light curtain. Brackets 3 are fixedly connected to the front and back of the housing 1. The inner sides of these brackets 3 are movably connected to the support frame 4 via pins, allowing the support frame 4 to swing around the pins. The outer side of the support frame 4 is fixedly connected to the spring plate 5, and the side of the spring plate 5 away from the support frame 4 extends to the outside of the casing 1 and keeps in contact with the surface of the casing 1. In this way, the spring plate 5 plays a role in elastically supporting the support frame 4. When the safety light curtain sensor is subjected to external extrusion, such as when a worker or an object accidentally collides with the casing 1, this impact force will be transmitted to the support frame 4. Since the support frame 4 and the bracket 3 are movably connected by a pin shaft, the support frame 4 can swing around the pin shaft to absorb and disperse the impact force. At the same time, the swing of the support frame 4 will squeeze the spring plate 5, causing it to deform and shrink, further absorbing the impact force and protecting the machine. The shell 1 and the scanning end 2 are not damaged. In order to adjust the swing angle of the support frame 4, the safety light curtain sensor is also provided with a transmission structure 6. The dynamic structure includes a connecting frame 7 fixedly connected to the bottom of the shell 1. The bidirectional screw 8 is movably connected to the inside of the connecting frame 7 through a bearing. Both sides of the surface of the bidirectional screw 8 are threadedly connected to the screw sleeve 9. The screw sleeve 9 can move on the bidirectional screw 8. When the screw sleeve 9 moves outward, the pressure rod 11 will squeeze the force plate 10, so that it drives the support frame 4 to swing and adjust. In this way, by adjusting the rotation direction and speed of the bidirectional screw 8, the moving direction and distance of the screw sleeve 9 can be controlled, thereby adjusting the swing angle of the support frame 4.

[0034] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A safety light curtain sensor, comprising a housing (1); A scanning end (2) mounted inside the housing (1); It is characterized by: The housing (1) is fixedly connected to brackets (3) on both sides of the front and back sides, the inner side of the bracket (3) is movably connected to a support frame (4) via a pin shaft, the outer side of the support frame (4) is fixedly connected to a spring plate (5), the spring plate (5) extends to the outer side of the housing (1) away from the support frame (4) and contacts the surface of the housing (1), the spring plate (5) can elastically support the support frame (4), and when the support frame (4) is subjected to external compression, it can swing around the pin shaft inside the bracket (3) as the axis and compress the spring plate (5) to deform and shrink, and a transmission structure (6) is provided at the bottom of the housing (1), and the transmission structure (6) can control the swing adjustment of multiple support frames (4).

2. A safety light curtain sensor according to claim 1, characterized in that: The transmission structure (6) includes a connecting frame (7) fixedly connected to the bottom of the casing (1), the interior of the connecting frame (7) is movably connected to a bidirectional screw (8) through a bearing, both sides of the surface of the bidirectional screw (8) are threadedly connected to screw sleeves (9), the support frame (4) is fixedly connected to a force plate (10) on the side close to the bracket (3), the top of the screw sleeve (9) is fixedly connected to a pressure rod (11) located on the inner side of the force plate (10), the outer surface of the pressure rod (11) can contact the inner side of the force plate (10), and the screw sleeve (9) can use the pressure rod (11) to squeeze the force plate (10) during the process of moving outward to adjust the swing angle of the cover support frame (4).

3. A safety light curtain sensor according to claim 2, characterized in that: The surface of the pressure rod (11) is covered with a rubber sleeve (12), the outer surface of the rubber sleeve (12) is in contact with the surface of the force-bearing plate (10), and the rubber sleeve (12) is elastic.

4. A safety light curtain sensor according to claim 2, characterized in that: The outer side of the load-bearing plate (10) is fixedly connected to a corner plate (13), and the side of the corner plate (13) away from the load-bearing plate (10) is fixedly connected to the surface of the support frame (4). The corner plate (13) can support and connect the support frame (4) and the load-bearing plate (10).

5. The safety light curtain sensor according to claim 1, characterized in that: An extension plate (14) is fixedly connected to the side of the support frame (4) away from the bracket (3), and an elastic roller (15) is movably connected to the side of the extension plate (14) away from the support frame (4) via a pin.

6. The safety light curtain sensor according to claim 2, characterized in that: Both sides of the connection frame (7) are fixedly connected to limit rods (16), the limit rods (16) are located on both sides of the bidirectional screw rod (8), and the screw sleeve (9) is sleeved on the surface of the limit rod (16) and is slidably connected to the limit rod (16).

7. The safety light curtain sensor according to claim 2, characterized in that: One end of the bidirectional screw (8) passes through the connecting frame (7) and extends to the outside of the connecting frame (7), and one end of the bidirectional screw (8) located outside the connecting frame (7) is fixedly connected to a rotating wheel (17).

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