Photoelectric sensor with inclined optical axis

Abstract

The utility model relates to the technical field of photoelectric sensors, in particular to a photoelectric sensor with an inclined optical axis, which comprises a U-shaped shell, a transmitting end and a receiving end, the transmitting end and the receiving end are fixedly arranged in the U-shaped shell, and two ends of the U-shaped shell are designed to be inclined planes and are oppositely provided with a light outlet and a light inlet. The upper part of the shell at one end of the light inlet is wider than the lower part; the vertical heights of the light outlet and the light inlet are different, and the light output by the transmitting end passes through the light outlet and then is received by the receiving end through the light inlet. Through the inclined design of the emergent light angle and the incident light angle, the original square groove width and the horizontal optical axis are changed, the influence of external disordered light in a customer scene on a product can be effectively improved, meanwhile, after the optical axis is inclined, the detection area is larger than the detection area when the optical axis is horizontal, the detection range is widened, and the use scene of a customer can be better adapted.

Description

Technical Field

[0001] The utility model relates to the technical field of photoelectric sensors, in particular to an optical axis tilt type photoelectric sensor. Background Art

[0002] With the continuous improvement of industrial automation and intelligence, the demand for high-precision, fast-response, non-contact sensors is growing. Photoelectric sensors have been widely used in various fields due to their unique advantages, such as high precision, high sensitivity, and fast response.

[0003] Slot-type photoelectric sensors are widely used in various automated detection systems due to their simple structure and easy installation. However, with the continuous advancement of technology and the improvement of industrialization, traditional slot-type photoelectric sensors have gradually been unable to meet the growing performance and application requirements.

[0004] Specifically, existing slot-type photoelectric sensors often use a single optical axis layout in their structural design. This design is easily disturbed by external stray light (i.e. light generated by non-target objects) when facing complex lighting environments, resulting in reduced detection accuracy and stability of the sensor. In addition, the single optical axis design also limits its detection range, making it incapable of handling applications with a larger detection range.

[0005] In order to increase the detection range, the traditional solution is to choose multi-optical axis products. However, the introduction of multi-optical axis products not only increases the complexity and cost of the system, but also brings great limitations to customers' installation and use. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, the utility model provides a photoelectric sensor with tilted optical axis. By tilting the angles of light output and light input, and changing the original square slot width and horizontal optical axis, the influence of external stray light in the customer scene on the product can be effectively improved. At the same time, after the optical axis is tilted, its detection area is larger than the detection area when the optical axis is horizontal, thereby improving the detection range and being able to better adapt to the customer's usage scenarios.

[0007] The technical solution adopted by the utility model to solve its technical problems is: an optical axis tilted photoelectric sensor, the improvement of which is that it includes a U-shaped shell and a transmitting end and a receiving end fixedly arranged in the U-shaped shell, the two ends of the U-shaped shell are designed with inclined surfaces, and a light outlet and a light entrance are relatively arranged, the upper width of the shell at one end of the light entrance is greater than the lower width; the vertical heights of the light outlet and the light entrance are different, and the light output by the transmitting end passes through the light outlet and then through the light entrance to be received by the receiving end.

[0008] In the above technical solution, the transmitting end includes a light-projecting substrate, the receiving end includes a light-receiving substrate, and the optical axis tilt type photoelectric sensor also includes a main substrate, and the substrates are connected via a soft substrate.

[0009] In the above technical solution, fixing plates for fixing the transmitting end and the receiving end are symmetrically arranged in the U-shaped housing, and the gap between the fixing plates is equal to the thickness of the transmitting end and the receiving end.

[0010] The fixing plates in the above technical solution are in a trapezoidal shape, and the symmetrically arranged fixing plates form a "Y"-shaped gap.

[0011] The horizontal inclination angle of the transmitting end and the receiving end in the above technical solution is 5°.

[0012] The optical axis tilt type photoelectric sensor described in the above technical solution also includes an optical axis assembly, which includes a transparent cover and a lens. The lens is arranged on the inner walls at both ends of the U-shaped shell for focusing light; the transparent cover is arranged on the surface of the light outlet and the light entrance for protecting the lens.

[0013] The optical axis tilt type photoelectric sensor in the above technical solution also includes a CN connector with an LED hole, the CN connector is connected to the light adjustment component and the mode switching component, and when in operation, the LED emits light outward through the hole at the CN connector port.

[0014] In the above technical solution, the U-shaped housing is also provided with a through hole, and the through hole is used for screws to pass through to fix the optical axis tilt type photoelectric sensor.

[0015] The beneficial effect of the utility model is that by tilting the angles of light output and light input and changing the original square slot width and horizontal optical axis, the influence of external stray light in the customer scene on the product can be effectively improved. At the same time, after the optical axis is tilted, its detection area is larger than the detection area when the optical axis is horizontal, thereby improving the detection range and being able to better adapt to the customer's usage scenario. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of an optical axis tilt type photoelectric sensor shown in an embodiment of the utility model;

[0017] Figure 2 This is a diagram showing the effect of external stray light in an embodiment of the utility model;

[0018] Figure 3 Another schematic diagram of an optical axis tilt type photoelectric sensor according to an embodiment of the utility model;

[0019] Figure 4 This is a photoelectric detection effect diagram shown in an embodiment of the utility model;

[0020] Figure 5 Another schematic diagram of an optical axis tilt type photoelectric sensor according to an embodiment of the utility model; 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] As mentioned above, existing multi-axis products usually require more installation space and more complex wiring, which increases the difficulty and cost of installation. Secondly, the commissioning and maintenance of multi-axis products are also relatively complicated, requiring professional technicians to operate, which increases the cost of use for customers.

[0024] Based on this, the utility model provides an optical axis tilt type photoelectric sensor, such as Figure 1 As shown, it includes a U-shaped shell 1 and a transmitting end 2 and a receiving end 3 fixedly arranged in the U-shaped shell 1. The two ends of the U-shaped shell 1 are designed with inclined surfaces, and a light outlet 11 and a light inlet 12 are arranged opposite to each other. The upper width of the shell at one end of the light inlet 12 is greater than the lower width; the vertical heights of the light outlet 11 and the light inlet 12 are different, and the light output by the transmitting end 2 passes through the light outlet 11 and then through the light inlet 12 to be received by the receiving end 3.

[0025] like Figure 2 As shown, the left side is the optical axis tilted photoelectric sensor shown in the utility model, and the right side is the existing ordinary slot-type photoelectric sensor. When external stray light is directed vertically toward the photoelectric sensor, since the light inlet 12 is parallel to the light and there is no shielding, the external stray light can be refracted into the light inlet 12 at a certain angle, thereby affecting the detection; and the optical axis tilted photoelectric sensor shown in the present application, since the light inlet is designed as a bevel, the upper width of the shell at one end of the light inlet 12 is greater than the lower width, so that the external stray light can be effectively blocked, reducing the impact of the external stray light on the detection results.

[0026] In a possible implementation, the transmitting end 2 includes a light-projecting substrate, the receiving end 3 includes a light-receiving substrate, and the optical axis tilt type photoelectric sensor also includes a main substrate 4. The substrates are connected by a soft substrate, and the main substrate 4 is fixed to the U-shaped housing by screws.

[0027] The light-projecting substrate is used to emit light beams, which are shone on the object to be measured and are reflected or blocked accordingly according to the properties of the object (such as shape, color, distance, etc.). Most light-projecting substrates use visible light, mainly red, but other colors such as green or blue can also be used to judge specific properties.

[0028] The light receiving substrate is used to receive the light from the light projecting substrate and detect whether the light changes (such as reflection, shielding, etc.) due to the presence of the object being measured. These changes are then converted into electrical signals and processed and controlled by circuits.

[0029] The main substrate 4 is used to receive the electrical signals from the light receiving substrate, and process and analyze the electrical signals, thereby outputting control signals and detection results.

[0030] In one possible implementation, Figure 3 As shown, the U-shaped housing 1 is symmetrically provided with fixing plates 5 for fixing the transmitting end 2 and the receiving end 3, the gap between the fixing plates 5 is equal to the thickness of the transmitting end 2 and the receiving end 3, and the transmitting end 2 and the receiving end 3 are connected to the fixing plates 5 by glue.

[0031] In another embodiment, the outer surfaces of the transmitting end 2 and the receiving end 3 are provided with anti-slip structures ( Figure 3 (not shown), when the transmitting end 2 and the receiving end 3 are sandwiched between the fixing plates 5, the anti-slip structure contacts the upper and lower surfaces of the fixing plates 5, and the anti-slip structure can be a plurality of protrusions.

[0032] According to the above embodiments, the transmitting end 2 and the receiving end 3 are fixed in the U-shaped housing 1 by the fixing plate 5 to prevent them from sliding and thus affecting the light emitting and receiving effects.

[0033] In a possible implementation, the fixing plate 5 is in a trapezoidal shape, and the symmetrically arranged fixing plates form a "Y"-shaped gap. Through the above embodiment, the opening gap of the fixing plate 5 is increased, so that the installation of the transmitting end 2 and the receiving end 3 is more convenient.

[0034] In a possible implementation, the horizontal tilt angle of the transmitting end 2 and the receiving end 3 is 5°.

[0035] like Figure 4As shown, it is a photoelectric detection effect diagram shown in the utility model. By adjusting the tilt angle between the light outlet and the light entrance, the test range is increased, which can better be compatible with various scenarios of customers.

[0036] In one possible implementation, Figure 5 As shown, the optical axis tilt type photoelectric sensor also includes an optical axis assembly 6, which includes a transparent cover plate 61 and a lens 62. The lens 62 is arranged on the inner walls at both ends of the U-shaped shell 1 to focus the light; the transparent cover plate 62 is arranged on the surface of the light outlet 11 and the light entrance 12 to protect the lens 62.

[0037] In one possible implementation, Figure 5 As shown, the optical axis tilt type photoelectric sensor also includes a CN connector 7 with an LED hole, the CN connector 7 is connected to the light adjustment component and the mode switching component, and the LED emits light to the outside through the hole at the end of the CN connector 7 when in operation.

[0038] In one possible implementation, Figure 5 As shown, the U-shaped housing 1 is further provided with a through hole 8, and the through hole 8 is used for screws to pass through to fix the optical axis tilt type photoelectric sensor.

[0039] Through the above embodiments, the present application tilts the angles of light output and light input, changes the original square slot width and horizontal optical axis, and can effectively improve the impact of external stray light in the customer scene on the product. At the same time, after the optical axis is tilted, its detection area is larger than the detection area when the optical axis is horizontal, thereby improving the detection range and being able to better adapt to the customer's usage scenarios.

[0040] 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. An optical axis tilt type photoelectric sensor, characterized in that: It includes a U-shaped shell and a transmitting end and a receiving end fixedly arranged in the U-shaped shell. The two ends of the U-shaped shell are designed with inclined surfaces, and a light outlet and a light inlet are arranged opposite to each other. The upper width of the shell at one end of the light inlet is greater than the lower width; the light outlet and the light inlet have different vertical heights, and the light output by the transmitting end passes through the light outlet and then through the light inlet to be received by the receiving end.

2. The optical axis tilt type photoelectric sensor according to claim 1, characterized in that: The transmitting end includes a light-projecting substrate, the receiving end includes a light-receiving substrate, and the optical axis tilt type photoelectric sensor also includes a main substrate, and the substrates are connected via a soft substrate.

3. The optical axis tilt type photoelectric sensor according to claim 1, characterized in that: Fixing plates for fixing the transmitting end and the receiving end are symmetrically arranged in the U-shaped housing, and the gap between the fixing plates is equal to the thickness of the transmitting end and the receiving end.

4. The optical axis tilt type photoelectric sensor according to claim 3, characterized in that: The fixing plates are in a trapezoidal shape, and the symmetrically arranged fixing plates form a "Y"-shaped gap.

5. The optical axis tilt type photoelectric sensor according to claim 4, characterized in that: The outer surfaces of the transmitting end and the receiving end are provided with anti-skid structures. When the transmitting end and the receiving end are sandwiched between the fixing plates, the anti-skid structures are in contact with the upper and lower surfaces of the fixing plates.

6. The optical axis tilt type photoelectric sensor according to claim 1, characterized in that: The horizontal inclination angle of the transmitting end and the receiving end is 5°.

7. The optical axis tilt type photoelectric sensor according to claim 1, characterized in that: The optical axis tilt type photoelectric sensor further comprises an optical axis assembly, wherein the optical axis assembly comprises a transparent cover plate and a lens, wherein the lens is arranged on the inner walls at both ends of the U-shaped housing and is used to focus the light; The transparent cover is arranged on the surfaces of the light outlet and the light entrance to protect the lens.

8. The optical axis tilt type photoelectric sensor according to claim 1, characterized in that: The optical axis tilt type photoelectric sensor also includes a CN connector with an LED hole, the CN connector is connected to the light intensity adjustment component and the mode switching component, and when in operation, the LED emits light to the outside through the hole at the CN connector port.

9. The optical axis tilt type photoelectric sensor according to claim 1, characterized in that: The U-shaped housing is also provided with a through hole, and the through hole is used for screws to pass through to fix the optical axis tilt type photoelectric sensor.

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