Infrared sensor and sensing faucet

Abstract

The infrared inductor comprises a shell and an infrared induction assembly, the infrared induction assembly is arranged in the shell and comprises an infrared emitter, an infrared receiver and a light diverging device, the light diverging device is arranged in an emergent light path of the infrared emitter, and the infrared emitter is connected with the infrared receiver. The part of infrared light at least comprises infrared light corresponding to the range of a specified area in the cross section of the emergent light path. Light rays are diffused through the light diffuser, the phenomenon that the induction distance to the surface of a smooth object is lengthened is effectively improved, light emitting energy of the device is not reduced, and therefore emission power consumption does not need to be increased under the same induction distance.

Description

Technical Field

[0001] The utility model relates to the field of sensors, in particular to an infrared sensor and an induction faucet. Background Art

[0002] At present, infrared sensors have been widely used in sanitary products, especially induction faucets, which are used to control the opening and closing of water through induction. In the product series of infrared induction faucets, downward induction faucets are widely used. The working principle of an infrared sensor is that an infrared emitter emits a beam of infrared rays. After passing through an obstacle, the infrared rays are reflected back, and the distance of the obstacle is determined by the amount of infrared rays received by the infrared receiver. This method has a drawback for existing infrared sensors, that is, different materials of the obstacle result in different reflection amounts, and thus different distance determinations. Since the infrared rays emitted by the infrared emitter are a conical light beam, the amount in the central area (direct emission) is the largest (more than 60% of the total emission amount), and the reflection on the surface of smooth objects is strong. The surface of the drain fitting of a washbasin commonly used in the market is very smooth with chrome plating or stainless steel mirror polishing, which may cause the downward induction faucet with an infrared sensor on the market to directly self-induce and fail to work properly. An infrared sensor in the prior art sets a light blocking part in the middle of the outgoing light path of the infrared emitter to block the stronger infrared light in the middle from emitting out of the housing, thereby effectively improving the phenomenon of the extended induction distance on the surface of smooth objects. However, this method will reduce the light output energy of the infrared sensor, and the emission power consumption needs to be increased to achieve the same induction distance as the infrared sensors on the market. Summary of the Utility Model

[0003] Aiming at the technical problems existing in the prior art, the utility model provides an infrared sensor and an induction faucet. By using a light diffuser to diverge light, the phenomenon of the extended induction distance on the surface of smooth objects is effectively improved, and the light output energy of the device is not reduced, so that the emission power consumption does not need to be increased under the same induction distance.

[0004] The technical solution adopted by the utility model to solve its technical problems is: an infrared sensor, including a housing and an infrared sensing component. The infrared sensing component is arranged in the housing and includes an infrared emitter and an infrared receiver. It also includes a light diffuser, which is arranged in the outgoing light path of the infrared emitter to diverge part of the infrared light emitted by the infrared emitter. The part of the infrared light at least includes the infrared light corresponding to the specified area within the cross-section of the outgoing light path.

[0005] Further, the light diffuser is a concave lens.

[0006] Further, the light diffuser is a Fresnel lens.

[0007] Further, in the thickness direction of the light diffuser, the projection of the infrared emitter on the light diffuser falls within the peripheral contour of the light diffuser.

[0008] Further, the specified area is the middle area inside the cross-section of the outgoing light path.

[0009] Further, the central axis of the light diffuser coincides or does not coincide with the central axis of the outgoing light path.

[0010] Further, the housing is provided with a light-transmissive induction window. The light diffuser is integrally formed with the induction window. Alternatively, the induction window is provided with a positioning hole on the outgoing light path of the infrared emitter, and the light diffuser is installed in the positioning hole.

[0011] Further, the induction window is integrally formed with the housing.

[0012] Further, it further includes a light shield. The light shield is located inside the housing, and the infrared induction component is located inside the light shield. The light shield is provided with an emission hole corresponding to the infrared emitter and a receiving hole corresponding to the infrared receiver. The infrared emitter is fitted in the emission hole, and the infrared receiver is fitted in the receiving hole.

[0013] The present utility model further provides an induction faucet, including a faucet body, and the faucet body is installed with the infrared sensor of any one of the above.

[0014] Compared with the prior art, the present utility model has the following beneficial effects:

[0015] 1. The present utility model further includes a light diffuser, which is arranged in the outgoing light path of the infrared emitter to diverge part of the infrared light emitted by the infrared emitter. The part of the infrared light at least includes the infrared light corresponding to the range within the specified area inside the cross-section of the outgoing light path, effectively improving the phenomenon of the extended induction distance on the surface of smooth objects, improving the stability and reliability of the device, and without reducing the light output energy of the device, so that the emission power consumption does not need to be increased at the same induction distance.

[0016] 2. The light diffuser is a concave lens, and the light diffuser is a Fresnel lens. By the principle of the Fresnel lens, the continuous surface part of the concave lens is "collapsed" onto a plane, so that the incident light can be diverged.

[0017] 3. The housing is provided with a light-transmissive induction window. The light diffuser is integrally formed with the induction window, and the induction window is integrally formed with the housing, thus eliminating the need to add additional accessories and reducing costs.

[0018] The following further describes the present utility model in detail with reference to the drawings and embodiments; however, an infrared sensor and an induction faucet of the present utility model are not limited to the embodiments. Description of the Drawings

[0019] Figure 1 is an exploded view of the present utility model;

[0020] Figure 2 is a schematic diagram of the three-dimensional structure of the present utility model Figure 1 ;

[0021] Figure 3 is a schematic diagram of the three-dimensional structure of the present utility model Figure 2 (side cross-section);

[0022] Figure 4 is a cross-sectional view of the present utility model Figure 1 ;

[0023] Figure 5 is a cross-sectional view of the present utility model Figure 2 (showing the light path);

[0024] In the figure: 1. housing; 2. infrared induction component; 21. infrared emitter; 22. infrared receiver; 3. light diffuser; 4. induction window; 5. light shield; 51. emission hole; 52. receiving hole. Specific embodiments

[0025] In the present utility model, for the description, the orientation or positional relationship indicated by "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] In addition, in the description of the present utility model, unless otherwise clearly specified and limited, terms such as "installed", "provided with", "equipped with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection, can be a mechanical connection, can be an electrical connection, can be directly connected, or can be indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] Please refer to Figures 1 - 5As shown, an infrared sensor of the present utility model includes a housing 1 and an infrared sensing component 2. The infrared sensing component 2 is disposed within the housing 1 and includes an infrared emitter 21 and an infrared receiver 22. It further includes a light diffuser 3, which is disposed in the outgoing light path of the infrared emitter 21 to diverge part of the infrared light emitted by the infrared emitter 21. The part of the infrared light at least includes the infrared light corresponding to the specified area within the cross-section of the outgoing light path. Specifically, the specified area is the middle area within the cross-section of the outgoing light path.

[0028] The light diffuser 3 is a concave lens, and the light diffuser 3 is a Fresnel lens.

[0029] In the thickness direction of the light diffuser 3, the projection of the infrared emitter 21 on the light diffuser 3 falls within the peripheral contour of the light diffuser 3, so that the relatively strong light in the middle area of the infrared emitter 21 can all pass through the light diffuser 3 for divergence. Thus, the phenomenon that the sensing distance for the surface of a smooth object is lengthened can be effectively improved. Specifically, the divergence route of the light passing through the light diffuser 3 is as Figure 5 shown by the arrow in

[0030] In this embodiment, the central axis of the light diffuser 3 coincides with the central axis of the outgoing light path, but it is not limited thereto. In other embodiments, the central axis of the light diffuser 3 does not coincide with the central axis of the outgoing light path, and there is a certain deviation distance between the two.

[0031] In this embodiment, the housing 1 is provided with a light-transmitting sensing window 4. The infrared light emitted by the infrared emitter 21 passes through the light diffuser 3 and then shoots out of the housing 1. The reflected infrared light passes through the sensing window 4 and is received by the infrared receiver 22. The light diffuser 3 and the sensing window 4 are integrally formed, and the sensing window 4 and the housing 1 are integrally formed, so that the number of parts is reduced, it is easy to process, the assembly is simple, and the cost is low. In other embodiments, the sensing window is provided with a positioning hole on the outgoing light path of the infrared emitter, and the light diffuser is installed in the positioning hole.

[0032] The present utility model further includes a light shielding cover 5. The light shielding cover 5 is located within the housing 1, and the infrared sensing component 2 is located within the light shielding cover 5. The light shielding cover 5 is provided with an emission hole 51 corresponding to the infrared emitter 21 and a receiving hole 52 corresponding to the infrared receiver 22. The infrared emitter 21 is fitted in the emission hole 51, and the infrared receiver 22 is fitted in the receiving hole 52.

[0033] The infrared emitter 21 is an infrared light-emitting diode, and the infrared receiver 22 is an infrared receiving diode, which is easy to implement and has a low cost, but it is not limited thereto.

[0034] An infrared sensor of the present utility model changes the light path through a light diffuser 3, effectively improving the phenomenon of extended sensing distance on the surface of smooth objects, enhancing the stability and reliability of the device, and without reducing the light output energy of the device, so that the transmission power consumption does not need to be increased at the same sensing distance.

[0035] An induction faucet of the present utility model includes a faucet body, and the infrared sensor as described above is installed on the faucet body. Specifically, the induction faucet is a downward induction faucet.

[0036] An induction faucet of the present utility model improves the phenomenon that it may directly self-induce and cannot work properly, and increases the stability and reliability.

[0037] For the structure and working principle of the infrared sensor in an induction faucet of the present utility model, please refer to the previous description part, and will not be elaborated here.

[0038] For an infrared sensor and an induction faucet of the present utility model, the parts not involved are the same as or can be implemented by the prior art.

[0039] The above embodiments are only used to further illustrate an infrared sensor and an induction faucet of the present utility model, but the present utility model is not limited to the embodiments. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the technical solution of the present utility model.

Claims

1. An infrared sensor, comprising a housing and an infrared sensing component, wherein the infrared sensing component is arranged in the housing and comprises an infrared transmitter and an infrared receiver, wherein: It also includes a light diffuser, which is arranged in the outgoing light path of the infrared emitter to diffuse part of the infrared light emitted by the infrared emitter, and the part of the infrared light at least includes the infrared light corresponding to the range of the specified area inside the cross section of the outgoing light path.

2. The infrared sensor according to claim 1, characterized in that: The light diffuser is a concave lens.

3. The infrared sensor according to claim 2, characterized in that: The light diffuser is a Fresnel lens.

4. The infrared sensor according to claim 1, characterized in that: In the thickness direction of the light diffuser, the projection of the infrared emitter on the light diffuser falls within the surrounding contour of the light diffuser.

5. The infrared sensor according to claim 1, characterized in that: The designated area is a middle area inside the cross section of the outgoing light path.

6. The infrared sensor according to claim 1, characterized in that: The central axis of the light diffuser coincides or does not coincide with the central axis of the outgoing light path.

7. The infrared sensor according to any one of claims 1 to 6, characterized in that: The housing is provided with a light-transmissive sensing window, and the light diffuser is integrally formed with the sensing window, or the sensing window is provided with a positioning hole located on the outgoing light path of the infrared emitter, and the light diffuser is installed in the positioning hole.

8. The infrared sensor according to claim 7, characterized in that: The sensing window is integrally formed with the shell.

9. The infrared sensor according to claim 1, characterized in that: It also includes a light-shielding cover, which is located in the shell, and the infrared sensing component is located in the light-shielding cover. The light-shielding cover is provided with a transmitting hole corresponding to the infrared transmitter and a receiving hole corresponding to the infrared receiver. The infrared transmitter fits in the transmitting hole, and the infrared receiver fits in the receiving hole.

10. An induction faucet, comprising a faucet body, characterized in that: The faucet body is installed with an infrared sensor as described in any one of claims 1-9.

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