CN215867157U - Wide-angle inductor - Google Patents

Abstract

The utility model relates to the field of sensors, and particularly discloses a wide-angle sensor which comprises a shell, a Fresnel lens and electronic components arranged in the shell, wherein the electronic components comprise a circuit board, a pyroelectric probe and the like, the pyroelectric probe is fixed on a circuit board, the circuit board is provided with an installation plane, a reflection cup is arranged at the center of the installation plane, and the pyroelectric probes are distributed at intervals along the reflection cup. Lens through the shape formation of awl clitellum and flat top surface to and the cooperation of reflection cup, make when infrared ray gets into the reflection space, be full of more easily, and then make the pyroelectric probe that sets up through plane surrounding mode receive the infrared ray more easily, realize the activation of inductor, so its wide angle detection effect is very good.

Description

Wide-angle inductor

Technical Field

The utility model relates to the technical field of inductors, in particular to a wide-angle inductor.

Background

With the development of science and technology, the application of sensors is more and more extensive, for example, sensors are often needed to be used in various automatic devices, and automatic sensing devices also need to be equipped with sensors. The sensor arranged in the corridor has the advantages that people are likely to appear in all directions of the corridor, so that the requirements on the sensing range and angle of the sensor are provided, and further the structure of the existing sensor needs to be adjusted.

In order to meet the requirement of wide sensing range, a conventional method is to arrange a plurality of sensing probes circumferentially distributed at intervals on a circuit board, and each sensing probe cannot be located on the same plane, which can only enlarge the plane sensing range but cannot increase the wide-angle sensing range, and the specific arrangement mode is shown in fig. 1 and 2. The whole sensor comprises a lower cover 11, a circuit board 12, a lens pressing plate 13, a lens 14, a middle cover 15 and an upper cover 16, wherein a bracket 2 for fixing the probes is arranged on the circuit board, and 3 mounting surfaces 21 forming angles with each other are arranged on the bracket, so that when three probes 3 are mounted on the bracket, a wide-angle sensing effect is presented.

However, in the above manner, since the support has the mounting surfaces forming an angle with each other, and after the probe is mounted, the three pins of the probe need to pass through the mounting surfaces and then pass through the contacts on the circuit board to be completely mounted, when the probe is assembled, firstly, 3 pins of each probe need to be bent accurately, then, the pins firstly pass through the mounting surfaces by a person, then, the pins pass through the contacts on the circuit board, and finally, the pins are soldered by a hand, so that the operation difficulty is high, and the operation of old staff is usually required, and new staff cannot easily get on the hand. In addition, 9 welding points appear in a small area (the area of the circuit board below the bracket), and the welding difficulty is very high. In addition, the sensing range of the human body jumps when the human body moves, namely dead detection angles are often presented.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a flip-chip type conical linear reflecting cup which is large in wide angle range and convenient to mount.

In order to achieve the purpose, the method is realized by the following technical means: the utility model provides a wide angle inductor, includes casing, fresnel lens and sets up at the inside electronic components of casing, electronic components includes circuit board and heat and releases electric probe etc. on heat and release electric probe and be fixed in a circuit board, the circuit board has a mounting plane, is provided with a reflection cup at mounting plane's center, and heat releases electric probe and is a plurality of again for central interval distribution along reflection cup.

Through the technical scheme, through the setting of toper reflection cup, after the infrared ray passes fresnel lens, will be by fresnel lens, the mounting surface encloses the space that closes and forms in the reflection, cooperation reflection cup, can make on the ejection of infrared ray can one of them or a plurality of heat release electric probe of great probability, and then arouse the sensor, thereby only need adopt a mounting surface just can realize the response of great wide angle scope, and just also because only adopted a mounting surface, when the installation of heat release electric probe, need not carry out the step of bending to the pin, only need vertical grafting pin on the mounting surface can, high durability and convenient operation, the promotion assembly rate by a wide margin has also, new staff directly goes up the manual operation easily.

The method is further optimized as follows: the reflecting cup is of a frustum-shaped structure with an outer conical surface and an inner conical surface, and the smaller diameter end of the reflecting cup is fixed on the mounting plane.

The method is further optimized as follows: the outer conical surface of the reflecting cup is in a smooth surface shape and is coated with high-light-reflecting materials.

According to the scheme, infrared rays are emitted from the side surface after passing through the Fresnel lens, a plurality of light-gathering points are formed by the energy focusing blocks on the annular peripheral wall of the Fresnel lens, the light-gathering points hit the outer conical surface of the reflecting cup, and then the reflecting cup reflects or refracts the infrared rays to the pyroelectric probe, so that the probability that the pyroelectric probe receives the infrared rays is improved, and the wide-angle detection sensitivity of the whole sensor is improved; in addition, the reason that the outer conical surface of the reflecting cup is smooth is that no matter which angle the infrared light enters or moves within the range of 360 degrees, the reflecting cup can linearly reflect or refract the infrared light to one or more pyroelectric probes, the sensitivity of each angle is compensated, jumping feeling cannot occur, and detection dead angles cannot be presented; and from the infrared ray of front incidence, because the pyroelectric probe has partial direct fresnel lens top plane part just, consequently can directly refract to the pyroelectric probe from the infrared ray of front incidence for the route of light becomes simply direct, reduces the reflection path of light path, makes the reaction time of sensor shorter.

The method is further optimized as follows: the conicity of the inner conical surface and the conicity of the outer conical surface of the reflecting cup are the same.

The method is further optimized as follows: the Fresnel lens is provided with a tapered circumferential surface and a planar top surface.

Through above-mentioned scheme, compare in the lens shape of complete spherical surface form, this kind of lens with the shape formation of conical ring face and plano top surface, with the cooperation of the transmission cup in the reflection space, can make to penetrate inside infrared light and be full of the reflection space more easily, and then improve the wide angle sensitivity of inductor.

Compared with the prior art, the utility model has the advantages that: the lens formed by the shapes of the conical ring surface and the flat top surface and the matching of the reflecting cup enable infrared rays to be filled more easily when entering the reflecting space, so that the pyroelectric probe arranged in a plane surrounding mode can receive the infrared rays more easily, activation of the sensor is achieved, and the wide-angle detection effect is very good; on the other hand is only through a mounting plane, and the mounting plane is parallel with the circuit board of lower part for when the pyroelectric probe of installation, can vertical grafting, simple to operate simplifies the mounting process and promotes the installation effectiveness by a wide margin.

Drawings

FIG. 1 is an exploded view of a 360 ° planar lens sensor of the prior art;

FIG. 2 is a schematic diagram of a circuit board and a circuit board according to the prior art;

FIG. 3 is a schematic view of the wide-angle sensor in the present embodiment;

FIG. 4 is a schematic diagram of the upper cover, Fresnel lens and other parts separated in the present embodiment;

fig. 5 is an exploded view of the wide-angle sensor in this embodiment.

In the figure, 3, a pyroelectric probe; 41. a lower cover; 42. a circuit board; 43. a middle cover; 44. a Fresnel lens; 441. a circumferential wall; 442. a top surface; 45. an upper cover; 5. a circuit board; 6. a reflective cup.

Detailed Description

The utility model will be further described in the following by means of specific embodiments, which are given by way of illustration only and are not limiting to the scope of the utility model.

Examples

A wide-angle sensor, refer to fig. 3-5, comprising a lower cover 41, a middle cover 43 and an upper cover 45, wherein a circuit board 42 is installed in the lower cover 41, the circuit board 42 is provided with a circuit board 5, a pyroelectric probe 3 and a reflection cup 6 are installed on the circuit board 5, the middle cover 43 is installed after the circuit board 42 is installed in the lower cover 41, the middle cover 43 and the lower cover 41 are buckled through a buckle structure, the middle cover 43 is provided with a avoiding hole for avoiding the reflection cup 6 and the pyroelectric probe 3, a Fresnel lens 44 is installed on the upper side surface of the middle cover 43 in a covering mode, and finally the upper cover 45 is installed.

The space enclosed by the fresnel lens 44 and the circuit board 5 is a reflection space for infrared rays, and the infrared rays enter the reflection space after passing through the fresnel lens 44. Here, the reflection cup 6 is attached to the center of the mounting plane of the circuit board 5, and 3 pyroelectric probes 3 are provided, but not limited to 3, and may be provided at regular intervals around the reflection cup 6. The fresnel lens 44 includes a tapered annular peripheral wall 441 and a top surface 442 having a flat surface. When the pyroelectric probe 3 is installed, firstly, the circuit board 5 and the circuit board 42 are positioned and installed, then three pins of the probe vertically penetrate through the installation plane of the circuit board 5 and then are inserted into contacts on the circuit board 5, the installation of the pyroelectric probe 3 can be realized through simple vertical insertion, and then the welding is realized through wave soldering, compared with the multi-angle installation plane mode in the prior art, because the mounting plane is at an angle with the plane of the circuit board 5, the pins need to be bent manually, the bending points need to be very precise, otherwise the pins cannot be matched with the contacts on the circuit board 5 below after passing through the mounting plane, so the mounting difficulty is very high, after the plugging and installation, the probe can be fixed only by manual welding, the density of pins on the circuit board 5 is very high, the welding difficulty is also very high, and the manual testing and the welding time are very long. Through the mode in this embodiment, very big reduction the operation degree of difficulty and shortened assembly man-hour, promote work efficiency.

The taper of the inner conical surface and the taper of the outer conical surface of the reflecting cup 6 are consistent, and the outer conical surface is in a smooth surface shape; the fresnel lens 44 includes a tapered annular peripheral wall 441 and a top surface 442 having a flat surface. Through the cooperation of reflection cup 6 and fresnel lens 44 of this kind of shape, after infrared ray penetrated into the reflection space, can be by many times and the reflection of multi-angle, and then be full of as far as possible and reflect the space, the mode that pyroelectric probe 3 received infrared ray has two kinds. Firstly, infrared rays emitted from the side face form a plurality of light-focusing points through an energy focusing block on the circumferential wall 441 of the Fresnel lens 44, the light-focusing points hit on an outer conical surface of the reflection cup 6, and then the reflection cup 6 reflects or refracts the infrared rays to the pyroelectric probe 3, so that the probability that the pyroelectric probe 3 receives the infrared rays is improved, and the wide-angle detection sensitivity of the whole sensor is improved; in addition, the reason that the outer conical surface of the reflecting cup 6 is smooth is that no matter which angle the infrared light enters or moves within the range of 360 degrees, the reflecting cup 6 can linearly reflect or refract the infrared light to one or more pyroelectric probes 3, the sensitivity of each angle is compensated, jumping feeling cannot occur, and detection dead angles cannot be presented; the infrared rays emitted from the front surface directly face the top plane 442 part of the Fresnel lens 6, so that the infrared rays emitted from the front surface can be directly refracted onto the pyroelectric probe 3, the path of the light rays is simple and direct, the reflection path of the light path is reduced, and the reaction time of the sensor is shorter; therefore, the design of the scheme can also realize the effect of simplifying the installation process and improving the installation efficiency on the basis of satisfying the wide-angle detection of the sensor.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims (6)

1. The utility model provides a wide angle inductor, includes casing, fresnel lens (44) and sets up the electronic components inside the casing, electronic components includes circuit board (42) and heat release electric probe (3), its characterized in that, heat release electric probe (3) are fixed in on a circuit board (5), circuit board (5) have a mounting plane, are provided with a reflection cup (6) at the mounting plane, and heat release electric probe (3) have a plurality of for central interval distribution along reflection cup (6).

2. A wide-angle inductor as claimed in claim 1, characterized in that the reflector cup (6) is a frustum-shaped structure having an outer conical surface and an inner conical surface, and the smaller diameter end of the reflector cup (6) is fixed to the mounting plane.

3. A wide-angle inductor as claimed in claim 1, characterized in that the reflector cup (6) is arranged centrally in the mounting plane.

4. A wide-angle inductor as claimed in claim 2, characterized in that the outer cone of the reflector cup (6) is in the form of a smooth surface.

5. A wide-angle inductor as claimed in claim 2, characterized in that the tapers of the inner and outer conical surfaces of the reflector cup (6) are the same.

6. A wide-angle sensor as claimed in claim 1, wherein the fresnel lens (44) has a tapered circumferential surface and a planar top surface (442).

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