CN219161462U

CN219161462U - Infrared induction probe

Info

Publication number: CN219161462U
Application number: CN202223471762.9U
Authority: CN
Inventors: 黄杰锋; 马旭红; 黄海斌
Original assignee: Ningbo Technic Lighting Co ltd
Current assignee: Ningbo Technic Lighting Co ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-06-09
Anticipated expiration: 2032-12-20

Abstract

An infrared sensing probe, comprising: the shell (1) is hollow, and the side wall of one side of the shell (1) is provided with an opening; an infrared emission element (2) which is arranged in the shell (1) and is opposite to the opening; an infrared receiving element (3) which is arranged in the shell (1), is arranged side by side with the infrared emitting element (2) and is opposite to the opening; the optical filter (4) is only used for allowing infrared light to pass through and is arranged in the opening of the shell (1) so as to cover the opening; the periphery of the opening of the shell (1) extends outwards relative to the side wall of the shell (1) where the opening is positioned to form a circle of flanges (11), and a concave cavity (10) which is concave inwards is formed between the flanges (11) and the optical filter (4). Compared with the prior art, the deep color door plant induction problem of bad can be solved to this application.

Description

Infrared induction probe

Technical Field

The utility model belongs to the technical field of sensors, and particularly relates to an infrared induction probe.

Background

The infrared sensing probe has a structure disclosed in an utility model patent application No. CN201810851120.0 (application publication No. CN 108983304A) and comprises a cylindrical shell, an infrared receiving unit and an infrared transmitting unit which are arranged in the shell, wherein the infrared receiving unit and the infrared transmitting unit are axially arranged in the shell, and each unit forms the precise infrared sensor through the shell, a filter arranged at the front end of the shell and a tail plug arranged at the rear end of the shell. The working principle of the sensor is as follows:

the infrared light emitted by the infrared emission unit passes through the filter and then is emitted outwards, irradiates to the object to be detected, is received by the infrared receiving unit after being reflected by the object to be detected, is converted into an electric signal by a circuit, and a controller connected with the infrared sensing probe can emit a corresponding control signal according to the received electric signal.

The existing infrared sensing probe is matched with the controller to control the lamp by detecting the opening and closing of the cabinet door. At this time, the cabinet door is the object to be detected, however, when the cabinet door is a dark door plate, the capability of reflecting light is weak, so that the infrared sensing probe is abnormal in function.

In addition, the existing infrared induction probe has the problem of parasitic interference, namely: the infrared transmitting unit emits infrared light to the inner side wall of the shell and then reflects the infrared light back to the infrared receiving unit, so that the infrared sensing probe has misjudgment.

Disclosure of Invention

The utility model aims to solve the first technical problem of providing an infrared induction probe aiming at the current state of the art so as to solve the problem of poor induction of a dark door plate.

The second technical problem to be solved by the utility model is to provide an infrared sensing probe so as to reduce parasitic interference caused by reflected light of a shell.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: an infrared sensing probe, comprising:

the shell is hollow, and the side wall of one side of the shell is provided with an opening;

the infrared emission element is arranged in the shell and is opposite to the opening;

the infrared receiving element is arranged in the shell, is arranged side by side with the infrared emitting element and is opposite to the opening;

the filter is only used for allowing infrared light to pass through and is arranged in the opening of the shell so as to cover the opening;

the method is characterized in that:

the periphery of the opening of the shell extends outwards relative to the side wall of the shell where the opening is positioned to form a circle of flange, and a concave cavity which is concave inwards is formed between the flange and the optical filter.

Preferably, the housing is arranged to pass only infrared light and is integral with the filter. In this way, the housing can prevent interference of other light.

Preferably, the whole concave cavity is in a horn shape, the small end of the concave cavity faces inwards, and the big end of the concave cavity faces outwards.

In the above aspect, preferably, the housing is entirely cylindrical, and the flange is located at an end of the cylindrical. Therefore, the cylindrical body can be directly inserted into the assembly hole of the mounting plate until the flange abuts against the plate surface where the hole edge of the assembly hole of the mounting plate is located, the assembly of the probe and the mounting plate can be realized, and the flange abutting against the plate surface of the mounting plate can play a role in water resistance.

In order to further improve the waterproof effect, preferably, the waterproof device further comprises a sealing ring sleeved on the side peripheral wall of the cylindrical body.

Further, the outer diameter of the cylindrical body is 9.8mm.

In the above embodiments, in order to further solve the second technical problem, it is preferable that the device further includes a light shielding block disposed in the housing, wherein a first surface of the light shielding block is opposite to the opening, and a transmitting hole and a receiving hole are spaced apart from each other; the infrared transmitting element is restrained in the transmitting hole, and the infrared receiving element is restrained in the receiving hole.

Preferably, the receiving hole is a circular hole, the infrared receiving element is a columnar body and is axially inserted into the circular hole, and the side peripheral surface of the infrared receiving element is adjacent to or attached to the wall of the circular hole.

Further, the emitting hole is a non-circular hole, the hole edge of the emitting hole is provided with a first edge relatively close to the receiving hole and a second edge relatively far away from the receiving hole, the first edge and the second edge are relatively arranged at intervals along the arrangement direction of the emitting hole and the receiving hole, and the interval between the first edge and the second edge is denoted as a;

the hole edge of the non-circular hole also comprises a third edge connected with the first edge and the second edge, the two third edges are oppositely arranged at intervals along the direction perpendicular to the arrangement direction of the transmitting hole and the receiving hole, and the interval between the two edges is denoted as b;

b＞a；

the infrared emission element is a columnar body and is axially inserted into the non-circular hole, and the part of the side peripheral surface of the infrared emission element, which is opposite to the first edge and the second edge of the non-circular hole, is adjacent to or attached to the corresponding edge of the non-circular hole; portions of the side circumferential surface of the infrared emitting element opposite to the two third edges of the non-circular hole are distant from the corresponding edges of the non-circular hole.

The receiving hole of infrared light is done to the circular hole that adopts the circular hole to do in this application, adopts the non-circular hole to do the emitting hole of infrared light for infrared light can be as far as possible from non-circular hole transmission, then receive from circular hole, so, the luminous angle of red light transmitting element is adjusted at column axial position to the accessible adjustment shading piece, and then reduces parasitic interference.

Compared with the prior art, the utility model has the advantages that: through setting up round flange at the open edge of casing, form the concave cavity of inwards sunken between the light filter in flange and the open, so, when infrared sensing probe's light filter set up towards the door plant, form a reflection of light cavity between cavity and the door plant to solve dark or even black door plant and respond to bad problem.

By additionally arranging the shading block in the shell, parasitic interference can be effectively prevented.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is an exploded perspective view of an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of an embodiment of the present utility model;

FIG. 4 is a schematic view of a part of the structure of an embodiment of the present utility model (the housing is omitted);

fig. 5 is a schematic view of a structure of the mounting plate according to the embodiment of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1 to 5, a preferred embodiment of an infrared sensing probe according to the present utility model includes a housing 1, an infrared emitting element 2, an infrared receiving element 3, an optical filter 4, a sealing ring 5, and a light shielding block 6.

Wherein, the inside of the shell 1 is hollow and is a cylinder, and one end of the cylinder is provided with an opening. The optical filter 4 is disposed in the opening of the housing 1, and shields the opening and allows only infrared light to pass through. In this embodiment, the material of the housing 1 is the same as that of the filter 4, and the two are integrated. At the same time, the periphery of the opening of the housing 1 extends outwards relative to the filter 4 to form a circle of flange 11, and a concave cavity 10 which is concave inwards is formed between the flange 11 and the filter 4. The whole concave cavity 10 is horn-shaped, the small end of the concave cavity faces inwards and is opposite to the optical filter 4, and the big end of the concave cavity faces outwards.

The seal ring 5 is fitted around the side peripheral wall of the tubular body. And the outer diameter of the cylindrical body was 9.8mm.

The infrared emitting element 2 and the infrared receiving element 3 are arranged in the shell 1 side by side and are opposite to the optical filter 4.

The light shielding block 6 is disposed in the housing 1, the first surface of the light shielding block 6 is opposite to the optical filter 4, and the light shielding block is provided with a transmitting hole 61 for restraining the infrared transmitting element 2 and a receiving hole 62 for restraining the infrared receiving element 3 in parallel and spaced apart. The receiving hole 62 is a circular hole, the infrared receiving element 3 is a column body and is axially inserted into the circular hole, and the side peripheral surface of the infrared receiving element 3 is adjacent to or attached to the wall of the circular hole. The transmitting hole 61 is a non-circular hole, the hole edge of which has a first edge 611 relatively close to the receiving hole 62, a second edge 612 relatively far from the receiving hole 62, the first and second edges being relatively spaced apart along the arrangement direction of the transmitting hole 61 and the receiving hole 62, and the interval between them being denoted as a; the hole edge of the non-circular hole also comprises a third edge 613 which is connected with the first edge and the second edge, the two third edges 613 are oppositely arranged at intervals along the direction perpendicular to the arrangement direction of the transmitting hole 61 and the receiving hole 62, and the interval between the two edges is denoted as b, and b is more than a; the infrared emission element 2 is a columnar body and is axially inserted into the non-circular hole, and the part of the side peripheral surface of the infrared emission element 2 opposite to the first edge and the second edge of the non-circular hole is adjacent to or attached to the corresponding edge of the non-circular hole; portions of the side circumferential surface of the infrared emitting element 2 opposite to the two third edges 613 of the non-circular hole are distant from the corresponding edges of the non-circular hole.

In this embodiment, the first edge 611 is a straight edge extending in a direction perpendicular to the arrangement direction of the transmitting hole 61 and the receiving hole 62, and the second edge 612 is a circular arc edge and is convex with respect to the first edge. The two third edges 613 are arc-shaped edges, and two ends of each third edge 613 are connected with the ends of the corresponding first edge and second edge.

The light shielding block 6 in this embodiment can separate the red light emitting element from the infrared receiving element. And the circular hole is adopted to be used as a receiving hole of infrared light, and the non-circular hole is adopted to be used as a transmitting hole of infrared light, so that the infrared light can be transmitted out of the non-circular hole as much as possible and then received from the circular hole, and therefore, the light emitting angle of the red light transmitting element can be adjusted by adjusting the position of the shading block in the axial direction of the columnar body, and parasitic interference is further reduced.

In this embodiment, the structure of the assembly of the infrared sensing probe to the mounting plate 7 is shown in fig. 5, the mounting plate 7 is provided with an assembly hole, the housing 1 of the infrared sensing probe is axially inserted into the assembly hole, the flange 11 of the infrared sensing probe abuts against the surface of the mounting plate where the assembly hole is located, and meanwhile, the sealing ring 5 at the periphery of the housing 1 is in sealing fit with the wall of the assembly hole, so that the sealing waterproof performance between the infrared sensing probe and the mounting plate 7 is better.

The infrared sensing probe assembled to the mounting plate 7 can be used for detecting the opening and closing condition of the door plate to be detected, and the optical filter 4 on the infrared sensing probe is opposite to the plate surface of the door plate. At this time, due to the existence of the concave cavity 10, a reflective cavity is formed between the concave cavity 10 and the plate surface of the door plate, so that the problem of poor induction of the dark-color or even black door plate can be well solved.

Claims

1. An infrared sensing probe, comprising:

the shell (1) is hollow, and the side wall of one side of the shell (1) is provided with an opening;

an infrared emission element (2) which is arranged in the shell (1) and is opposite to the opening;

an infrared receiving element (3) which is arranged in the shell (1), is arranged side by side with the infrared emitting element (2) and is opposite to the opening;

the optical filter (4) is only used for allowing infrared light to pass through and is arranged in the opening of the shell (1) so as to cover the opening;

the method is characterized in that:

the periphery of the opening of the shell (1) extends outwards relative to the side wall of the shell (1) where the opening is positioned to form a circle of flanges (11), and a concave cavity (10) which is concave inwards is formed between the flanges (11) and the optical filter (4).

2. The infrared sensing probe of claim 1, wherein: the housing (1) is arranged to pass only infrared light and is integral with the filter (4).

3. The infrared sensing probe of claim 1, wherein: the whole concave cavity (10) is horn-shaped, the small end of the concave cavity faces inwards, and the big end of the concave cavity faces outwards.

4. An infrared sensing probe according to claim 3, characterized in that: the whole shell (1) is a cylindrical body, and the flange (11) is positioned at the end part of the cylindrical body.

5. The infrared sensing probe of claim 4, wherein: the sealing ring (5) is sleeved on the side peripheral wall of the cylindrical body.

6. The infrared sensing probe of claim 4, wherein: the outer diameter of the cylinder was 9.8mm.

7. The infrared sensing probe of any one of claims 1-6, wherein: the light shielding device also comprises a light shielding block (6) arranged in the shell (1), wherein the first surface of the light shielding block (6) is opposite to the opening, and a transmitting hole (61) and a receiving hole (62) are arranged in parallel at intervals; the infrared emitting element (2) is restrained in the emitting hole (61), and the infrared receiving element (3) is restrained in the receiving hole (62).

8. The infrared sensing probe of claim 7, wherein: the receiving hole (62) is a circular hole, the infrared receiving element (3) is a columnar body and is axially inserted into the circular hole, and the side peripheral surface of the infrared receiving element (3) is adjacent to or attached to the wall of the circular hole.

9. The infrared sensing probe of claim 7, wherein: the emitting hole (61) is a non-circular hole, the hole edge of the emitting hole is provided with a first edge (611) relatively close to the receiving hole (62) and a second edge (612) relatively far away from the receiving hole (62), the first edge and the second edge are relatively arranged at intervals along the arrangement direction of the emitting hole (61) and the receiving hole (62), and the interval between the first edge and the second edge is denoted as a;

the hole edge of the non-circular hole also comprises a third edge (613) connected with the first edge and the second edge, the two third edges (613) are oppositely arranged at intervals along the direction perpendicular to the arrangement direction of the transmitting hole (61) and the receiving hole (62), and the interval between the two edges is denoted as b;

b＞a；

the infrared emission element (2) is a columnar body and is axially inserted into the non-circular hole, and the part of the side peripheral surface of the infrared emission element (2) opposite to the first edge and the second edge of the non-circular hole is adjacent to or attached to the corresponding edge of the non-circular hole; portions of the side circumferential surface of the infrared emitting element (2) opposite to the two third edges (613) of the non-circular hole are distant from the corresponding edges of the non-circular hole.