Photoelectric sensor with variable optical axis

Abstract

The utility model relates to the technical field of sensors, and discloses an optical axis variable photoelectric sensor, which comprises a lens, a knob, a support and a shell, an assembly cavity is arranged in the shell, and the lens is arranged at an opening of the assembly cavity; an assembling cavity is formed in the shell, the support is rotationally installed in the assembling cavity, a through hole for the knob to penetrate through is formed in the top of the shell, a clamping head is arranged at the lower end of the knob, the clamping head penetrates through the through hole to be connected with an upper rotating shaft of the support in a clamped mode, and the rotation of the knob drives a lens on the support to rotate so as to achieve optical axis deviation; the support is further provided with a limiting piece used for increasing the damping feeling when the optical axis deviates. The rotatable support and the shell are assembled together, and the rotating shaft structure of the support is arranged in the shaft groove of the shell, so that the optical axis of the sensor can be adjusted within a limited angle, and the cost of production line change or additional tool investment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photoelectric sensors, in particular to a photoelectric sensor with a variable optical axis. Background Art

[0002] Photoelectric sensors play a vital role in industrial automation control. As a commonly used detection component, their performance directly affects the operating efficiency and product quality of the production line. However, in practical applications, the adjustment of the incident or outgoing optical axis of the photoelectric sensor is an issue that cannot be ignored. With the variability and complexity of the on-site environment, the optical axis of the photoelectric sensor often needs to be adjusted according to the actual situation. If the sensor itself does not have the optical axis adjustment function, it will not be able to effectively adapt to various application requirements, which may lead to a decrease in detection accuracy or even failure to work properly.

[0003] In some installation scenarios, traditional diffuse reflection square photoelectric sensors often have angle deviations on the installation surface due to limitations of actual application conditions. This makes it impossible for the sensor to accurately align with the object being detected, greatly reducing the detection effect.

[0004] Although these methods can solve the problem, they often require a lot of construction and transformation work on the existing scene, which not only wastes a lot of time and manpower costs, but also brings a lot of inconvenience. Especially in some occasions where production efficiency and stability are extremely high, this solution is obviously not the most ideal choice. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a variable optical axis photoelectric sensor to improve the adjustment accuracy and efficiency of the optical axis during the measurement process.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a photoelectric sensor with a variable optical axis, the improvement of which lies in: comprising a lens, a knob, a bracket and a shell, the interior of the shell having an assembly cavity, the lens being installed at the opening of the assembly cavity; the bracket being rotatably installed in the assembly cavity, the top of the shell being provided with a through hole for the knob to pass through, the lower end of the knob being provided with a clamping joint, the clamping joint passing through the through hole and being clamped with the upper rotating shaft of the bracket, the lens on the bracket being driven to rotate by the rotation of the knob to realize the optical axis offset; the bracket is also provided with a limiter for increasing the damping sense when the optical axis is offset.

[0007] The upper rotating shaft in the above technical solution includes an upper shaft column arranged in a "T" shape and a clamping body, the top of the clamping body is provided with a concave opening, and the lower end of the clamping joint is inserted into the opening of the clamping body.

[0008] In the above technical solution, the opening of the clamping body is in the shape of a regular hexagon, and the longitudinal section of the clamping joint is in the shape of a regular hexagon.

[0009] The position-limiting member in the above technical solution comprises a plurality of gear-tooth-shaped convex ribs evenly arranged along an arc, and the housing is provided with convex points meshing with the convex ribs, and the fine adjustment of the optical axis angle is achieved by meshing the convex points with the tooth gaps between the convex points and the convex ribs.

[0010] The arc-shaped uniformly arranged plurality of gear-tooth-shaped convex ribs in the above technical solution are coaxial with the upper rotating shaft.

[0011] The number of the convex ribs in the above technical solution is 6, which can achieve multi-level adjustment of the angle of the optical axis within -15° to 15°, with each adjustment angle being 5°.

[0012] In the above technical solution, the housing is provided with an upper shaft groove matched with the upper rotating shaft, and a lower shaft groove matched with the lower rotating shaft, and the upper shaft groove and the lower shaft groove have the same structure.

[0013] The upper shaft grooves in the above technical solution are symmetrically arranged and both the upper left shaft groove and the upper right shaft groove are in a clamp-shaped opening shape, and the cross-sections of the openings of the upper left shaft groove and the upper right shaft groove are inclined surfaces.

[0014] In the above technical solution, the bracket is also provided with a slot for fixing the lens, and buckles matching with the slot are provided on both sides of the lens.

[0015] The buckle material in the above technical solution is elastic material.

[0016] The beneficial effect of the utility model is that the rotatable bracket is assembled with the shell, and the shaft structure of the bracket is installed in the shaft groove of the shell, so that the sensor can adjust the optical axis within a limited angle, and the adjustment structure of the limiter is used to increase the damping to prevent the sensor angle from being offset due to vibration. This solution is aimed at users with uneven installation surfaces. Due to the deviation of the installation angle, it is impossible to detect objects. The design can be used to reduce the cost of production line changes or additional tooling investment, while improving the adjustment accuracy and efficiency of the optical axis during the measurement process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an explosion diagram of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the bracket of the utility model;

[0019] Figure 3 It is a schematic diagram of the structure of the housing of the utility model;

[0020] Figure 4This is a schematic structural diagram of another bracket of the present invention. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.

[0023] like Figure 1 As shown, the utility model provides a variable optical axis photoelectric sensor, including a lens 1, a housing 2, a knob 3 and a bracket 4. The housing 2 has an assembly cavity inside, and the lens 1 is installed at the opening of the assembly cavity. The housing 2 is used to protect the variable optical axis photoelectric sensor, and is also a carrier for assembling other parts, and has a larger light-emitting surface. The bracket 4 is rotatably installed in the assembly cavity. The top of the housing 2 is provided with a through hole 21 for the knob 3 to pass through. The lower end of the knob 3 is provided with a clamping joint 31. The clamping joint 31 passes through the through hole 21 and is connected to the upper rotating shaft 41 of the bracket 4. The rotation of the knob 3 drives the lens 42 on the bracket 4 to achieve optical axis offset; the bracket 4 is also provided with a limiter 43 for increasing the damping sense when the optical axis is offset.

[0024] By rotating the knob 3, the bracket 4 is driven to rotate along its axis, thereby achieving the offset of the optical axis. At the same time, due to the existence of the limiter 43, the damping feeling is increased for the rotation of the bracket 4, thereby improving the adjustment accuracy and efficiency of the optical axis during the measurement process.

[0025] In one possible implementation, Figure 2 As shown, the upper rotating shaft 41 includes an upper shaft column 411 arranged in a "T" shape and a clamping body 412, wherein the top of the clamping body 412 is provided with a concave opening for matching with the clamping joint 31, and the lower end of the clamping joint 31 is inserted into the opening of the clamping body. In an exemplary embodiment, the opening of the clamping body 412 is in a regular hexagonal shape, and the longitudinal section of the clamping joint 31 is in a regular hexagonal shape.

[0026] Through the mutual engagement between the engaging joint 31 and the engaging body 412 , when the knob 3 is rotated manually, the bracket 4 will rotate in the housing 2 along the axial direction, thereby achieving optical axis offset.

[0027] In one possible implementation, Figure 2-3 As shown, the stopper 43 includes a plurality of gear-shaped convex ribs 431 evenly arranged along an arc, and the housing 2 is provided with a convex point 22 meshing with the convex rib 431, and the fine adjustment of the optical axis angle is achieved by meshing the tooth gaps between the convex point 22 and the convex rib 431. When the knob 3 drives the bracket 4 to rotate in the housing 2, the meshing of the tooth gaps between the convex point 22 and the convex rib 431 greatly increases the damping feeling during the rotation process, thereby preventing the angle deviation of the optical axis variable photoelectric sensor caused by vibration, improving the alignment effect of the detected object, and improving the accuracy of the detection result.

[0028] It is worth mentioning that the embodiment is only used as a preferred embodiment for demonstration. In another possible implementation, the limit member 43 can be an annular rubber ring mounted on the upper shaft column 411. The annular rubber ring can increase the friction between the upper shaft column and the shaft groove, thereby increasing the damping feeling during the rotation of the bracket 4, and achieving the same technical effect as the limit member 43 described in the present application.

[0029] In an exemplary embodiment, the arc-shaped uniformly arranged plurality of gear-shaped ribs 431 are coaxial with the upper rotating shaft 41. When the knob 3 drives the bracket 4 to rotate in the housing 2, the convex point 22 coincides with the tooth gaps between the ribs 431 and switches according to user needs. When the user adjusts the optical axis to a suitable angle, the tooth gaps between the ribs 431 can also lock the convex point 22 to fix the optical axis angle.

[0030] In an exemplary embodiment, if Figure 2 As shown, the number of the convex ribs 431 is 6, which can achieve multi-level adjustment of the angle of the optical axis within -15° to 15°, and each adjustment angle is 5°. There are five tooth gaps between the six convex ribs 431. When the convex point 22 is engaged with the tooth gap in the middle, the angle of the optical axis is 0°. The optical axis can be adjusted by ±5° by rotating the knob 3 clockwise or counterclockwise; when the convex point 22 is located at the outermost side of the arc-shaped convex rib 431, the adjustment angle of the optical axis reaches the maximum, that is, ±15°. It is worth mentioning that the adjustment angle of the optical axis can be adaptively modified according to the size of the bracket 4, the spacing between the convex ribs 431, and the number, and is not limited to the embodiments shown in this application, and is not limited to this.

[0031] Through the above embodiments, the utility model adopts the adjustment structure of the convex rib to increase damping, thereby preventing the sensor from being offset due to vibration and improving the adjustment accuracy and efficiency of the optical axis during the measurement process.

[0032] In one possible implementation, Figure 2-3 As shown, the housing 2 is provided with an upper shaft groove 23 matched with the upper rotating shaft 41 , and a lower shaft groove 24 matched with the lower rotating shaft 44 , and the upper shaft groove 23 and the lower shaft groove 24 have the same structure.

[0033] In an exemplary embodiment, the upper shaft grooves 23 are symmetrically arranged and the upper left shaft groove and the upper right shaft groove are both clamp-shaped openings. The upper and lower shaft grooves are rotatably connected to the upper and lower shafts of the bracket 4, limiting the bracket 4 to rotate only along the shaft in the housing 2.

[0034] In an exemplary embodiment, the cross-section of the opening of the upper left shaft groove and the upper right shaft groove is an inclined surface. The shaft groove provided by the inclined surface can make it easier for the upper and lower rotating shafts of the bracket 4 to be inserted into the housing 2, and it is also easier to disassemble and replace the bracket 4 with a new one when the bracket 4 is worn.

[0035] In one possible implementation, Figure 4 As shown, the bracket 4 is also provided with a slot 45 for fixing the lens 42, and buckles 421 matching the slot 45 are provided on both sides of the lens 42. In an exemplary embodiment, the buckles 421 are made of elastic material. When the lens is worn or damaged, the lens 42 can be directly removed from the bracket by pressing the buckles 421 for replacement, thereby improving the reuse rate of the bracket 4 and saving costs.

[0036] Through the above embodiments, the utility model is assembled with the housing through a rotatable bracket, and the shaft structure of the bracket is installed in the shaft groove of the housing, so that the sensor can adjust the optical axis within a limited angle, and the wide-angle light-emitting surface can adjust the optical axis to -15°□+15°; the convex rib adjustment structure is used to increase damping to prevent vibration from causing sensor angle deviation, while improving the adjustment accuracy and efficiency of the optical axis during the measurement process. This solution is aimed at users with uneven installation surfaces. Due to the installation angle deviation, object detection cannot be achieved. This design can be used to solve the problem of reducing the cost of production line changes or additional tooling investment.

[0037] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A variable optical axis photoelectric sensor, characterized in that: It comprises a lens, a knob, a bracket and a shell, wherein the shell has an assembly cavity inside, and the lens is installed at the opening of the assembly cavity; The bracket is rotatably installed in the assembly cavity, the top of the shell is provided with a through hole for the knob to pass through, the lower end of the knob is provided with a clamping joint, the clamping joint passes through the through hole and is clamped with the upper rotating shaft of the bracket, and the lens on the bracket is driven to rotate by the rotation of the knob to realize the optical axis offset; the bracket is also provided with a limiter for increasing the damping feeling when the optical axis is offset.

2. The variable optical axis photoelectric sensor according to claim 1, characterized in that: The upper rotating shaft comprises an upper shaft column arranged in a "T" shape and a clamping body, the top of the clamping body is provided with a concave opening, and the lower end of the clamping joint is inserted into the opening of the clamping body.

3. The variable optical axis photoelectric sensor according to claim 2, characterized in that: The opening of the clamping body is in a regular hexagonal shape, and the longitudinal section of the clamping joint is in a regular hexagonal shape.

4. The variable optical axis photoelectric sensor according to claim 1, characterized in that: The position-limiting member comprises a plurality of gear-tooth-shaped convex ribs uniformly arranged along an arc, and the housing is provided with convex points meshing with the convex ribs, and the fine adjustment of the optical axis angle is achieved through the meshing of the convex points with the tooth gaps between the convex ribs.

5. The variable optical axis photoelectric sensor according to claim 4, characterized in that: The plurality of gear-tooth-shaped convex ribs evenly arranged in an arc shape are coaxial with the upper rotating shaft.

6. The variable optical axis photoelectric sensor according to claim 4, characterized in that: The number of the convex ribs is 6, which can achieve multi-level adjustment of the angle of the optical axis within the range of -15° to 15°, with each adjustment angle being 5°.

7. The variable optical axis photoelectric sensor according to claim 1, characterized in that: The shell is also provided with a lower shaft, a lower shaft groove matched with the lower shaft, and an upper shaft groove matched with the upper shaft, and the upper shaft groove has the same structure as the lower shaft groove.

8. The variable optical axis photoelectric sensor according to claim 7, characterized in that: The upper shaft grooves are symmetrically arranged and both the left upper shaft groove and the right upper shaft groove are in a clamp-shaped opening shape. The cross-sections of the openings of the left upper shaft groove and the right upper shaft groove are inclined surfaces.

9. The variable optical axis photoelectric sensor according to claim 1, characterized in that: The bracket is also provided with a slot for fixing the lens, and buckles matching with the slot are provided on both sides of the lens.

10. The variable optical axis photoelectric sensor according to claim 9, characterized in that: The buckle is made of elastic material.

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