Infrared human body induction device

Abstract

The utility model discloses an infrared human body induction device which comprises a shell, a lens, a circuit board assembly and an infrared sensor. The shell comprises a cylinder body, the circuit board assembly comprises a transverse circuit board and a longitudinal circuit board, and the longitudinal circuit board is vertically intersected and fixed on the bottom surface of the transverse circuit board; a horizontal boss and a longitudinal clamping groove are arranged on the inner cavity wall of the cylinder body, the groove bottom of the clamping groove penetrates through the side wall of the cylinder body to form a clamping seam, and a clamping tongue is arranged on a board body of the longitudinal circuit board; the circuit board assembly is placed in from the upper opening of the cylinder body, the longitudinal circuit board is inserted into the clamping groove and slides to the bottom of the cylinder body from the lower side in the axial direction of the cylinder body, the clamping tongue slides into the clamping groove and penetrates through the clamping seam to lock the longitudinal circuit board in the cylinder body, and the transverse circuit board moves to the horizontal boss. Due to the adoption of the structure, the induction device is provided with a fixing structure without screws, so that the possibility that the circuit board is damaged is avoided; the assembly is very convenient, and the production efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of infrared human body sensing devices. Background Art

[0002] The infrared human body sensor device can automatically detect whether a person passes or moves in the set activity area. The infrared human body sensor device is installed and integrated on the lamp to form an induction lamp. The induction lamp is usually used in public areas such as corridors and stairwells to automatically turn on the lighting when people walk at night.

[0003] At present, the infrared human body sensing device in the prior art includes an outer body, a whole large circuit board, an infrared sensor device and a lens, wherein the infrared sensor device is welded on the center of the circuit board, the circuit board is provided with two screw holes, and two upright studs are provided on the inner cavity bottom plate of the shell, and screws are used to pass through the screw holes on the circuit board from top to bottom and screwed together with the studs to fix the circuit board in the shell cavity; there are problems: since the circuit board is fixed and connected by screws, screw holes need to be opened on the circuit board, resulting in a large overall area of ​​the circuit board, making it difficult to achieve a miniaturized structure for infrared human body sensing, and the screws are prone to damage the circuit on the circuit board due to excessive torque when twisting the screws, and the production efficiency of assembling the infrared human body sensing device is low. Utility Model Content

[0004] The purpose of the utility model is to provide an infrared human body sensing device to solve the problems raised in the above-mentioned background technology. It has a structure in which the circuit board does not need to be fixed with screws, thereby avoiding the possibility of damage to the circuit board, and is very convenient to assemble, thereby greatly improving the production efficiency of the sensing device.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An infrared human body sensing device, comprising a housing, a lens, a circuit board assembly and an infrared sensor; the housing comprises a cylinder with an upper opening and a flange, the circuit board assembly comprises a transverse circuit board and a longitudinal circuit board, the longitudinal circuit board is vertically intersected and fixed on the center of the bottom surface of the transverse circuit board, and the infrared sensor is arranged on the center of the top surface of the transverse circuit board;

[0007] A horizontal boss is provided on the inner cavity wall of the cylinder, and two symmetrical longitudinal clamping grooves are provided on the inner cavity wall of the cylinder below the horizontal boss, and the bottom of the clamping grooves penetrates the side wall of the cylinder to form a narrow and long clamping seam; and clamping tongues are symmetrically provided on both sides of the upper part of the plate body of the longitudinal circuit board;

[0008] The circuit board assembly is inserted from the opening on the cylinder, the two side plates of the longitudinal circuit board are inserted into the clamping groove and slide down along the axial direction of the cylinder to the bottom of the cylinder, the latch slides into the clamping groove and passes through the latching seam to lock the longitudinal circuit board in the cylinder, the transverse circuit board moves to the horizontal boss stop position, the horizontal boss supports the transverse circuit board, and the lens cover is closed on the opening on the cylinder to seal the circuit board assembly in the cylinder.

[0009] Specifically, the transverse circuit board is circular, and the diameter of the transverse circuit board is equivalent to the inner cavity diameter of the cylinder; the longitudinal circuit board is rectangular, and the board width of the longitudinal circuit board is equal to the inner cavity diameter of the cylinder.

[0010] Furthermore, in order to facilitate the assembly of the circuit board assembly and realize fixed connection without additional connectors, two rectangular plug holes are symmetrically arranged on the horizontal circuit board, and two plug blocks are arranged on the top of the board body of the vertical circuit board. During assembly, the plug blocks are inserted into the plug holes of the horizontal circuit board from bottom to top, so that the vertical circuit board and the horizontal circuit board are vertically intersected and connected together.

[0011] Furthermore, in order to achieve a tight connection and circuit connectivity between the horizontal circuit board and the vertical circuit board, a first soldering pad is provided on the bottom surface of the horizontal circuit board next to the socket, and a second soldering pad is provided on the side surface of the vertical circuit board located at the plug block. When the plug block on the vertical circuit board is plugged into the socket of the horizontal circuit board, solder is used to weld and fix the first soldering pad and the second soldering pad together, and the circuit connection between the horizontal circuit board and the vertical circuit board is conducted.

[0012] Furthermore, in order to facilitate the installation and fixing of the lens, two pins extending downward are symmetrically arranged on the lower opening of the lens, notches are arranged on the left and right sides of the plate body of the horizontal circuit board, a gap is arranged between the notch and the inner cavity wall of the cylinder, the lens cover is closed on the upper opening of the cylinder, the pin slides along the inner wall of the cylinder, passes through the gap and is interference fit with the gap, and the lens is fastened to the upper opening of the cylinder.

[0013] Specifically, the lens is a Fresnel lens.

[0014] Furthermore, in order to facilitate the installation and fixing of the infrared human body sensing device on the induction lamp, two symmetrical elastic fasteners are arranged on the cylinder, and buckle patterns are arranged on the surface of the elastic fasteners. The cylinder is inserted into the through hole on the lampshade from top to bottom, and the elastic fasteners and the lampshade are buckled together to fix the infrared human body sensing device on the induction lamp.

[0015] The utility model discloses an infrared human body sensing device. As the circuit board assembly is composed of a horizontal circuit board and a vertical circuit board, the horizontal circuit board is fixedly connected to the circuit board assembly in a cylinder body through the matching buckles of a clamping tongue and a clamping groove and a clamping seam on a cylinder body, so that a fixing structure of the circuit board assembly without screws is realized, which greatly improves the assembly efficiency and yield rate of the sensing device. At the same time, the plug-in block on the vertical circuit board is plugged into the plug-in hole of the horizontal circuit board, and the first soldering pad is welded and fixed to the second soldering pad, so that the vertical circuit board and the horizontal circuit board are fastened together and the circuit connection and conduction of the two are realized at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the utility model.

[0017] Figure 2 It is a stereogram of the utility model.

[0018] Figure 3 yes Figure 1 AA section view.

[0019] Figure 4 It is a three-dimensional exploded view of the utility model.

[0020] Figure 5 It is a partial cutaway view of the shell of the utility model.

[0021] Figure 6 This is one of the three-dimensional diagrams of the circuit board assembly of the utility model.

[0022] Figure 7 This is the second stereoscopic diagram of the circuit board assembly of the present utility model.

[0023] The markings in the figure are: 1. housing; 2. lens; 3. circuit board assembly; 4. infrared sensor; 11. cylinder; 12. flange; 111. horizontal boss; 112. clamping groove; 113. slot; 114. elastic fastener; 21. latch; 31. horizontal circuit board; 32. vertical circuit board; 311. jack; 312. notch; 321. tongue; 322. plug; 51. first pad; 52. second pad; 1A, gap 1A. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and technical effect of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be described clearly and completely in combination with the drawings in the embodiment of the utility model. The described implementation method is only a part of the embodiment of the utility model, not all embodiments.

[0025] The terms "connection", "setting" and "installation" in the present invention should be understood in a broad sense. For example, "connection" can be a fixed connection, a movable connection or a detachable connection; it can also be a mechanical connection or a circuit connection; it can also be a direct connection, an indirect connection through an intermediate medium, or it can also be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly specified and limited, ordinary technicians in this technical field can understand the specific meanings of the above terms in the present invention according to actual conditions.

[0026] The terms "inside", "outside", "front", "back", "up", "down", "left" and "right" are only used to describe the orientation or positional relationship of the devices / components indicated in the drawings, rather than emphasizing that the devices / components indicated must have a specific orientation, structure and operation, and should not be understood as limiting the scope of protection of the present invention. The terms "first", "second", "third" and the like are only used for the convenience of description to distinguish different components with the same name, and do not indicate a sequence or primary and secondary relationship.

[0027] like Figures 1 to 5 As shown, an infrared human body sensing device includes a housing 1, a lens 2, a circuit board assembly 3 and an infrared sensor 4. The housing 1 includes a cylinder 11 with an upper opening and a flange 12 arranged on the upper opening of the cylinder. The circuit board assembly 3 is arranged in the cylinder 11, and the lens 2 covers the upper opening of the cylinder 2 to seal the infrared sensor 4 in the cylinder.

[0028] The circuit board assembly 3 includes a circular transverse circuit board 31 and a rectangular longitudinal circuit board 32, wherein the longitudinal circuit board 32 is perpendicularly intersected and arranged at the center of the bottom surface of the transverse circuit board 31, and the infrared sensor 4 is arranged at the center of the top surface of the transverse circuit board 31;

[0029] A horizontal boss 111 is provided on the inner wall of the cylinder 11, and two symmetrical longitudinal clamping grooves 112 are provided in the middle and lower part of the inner wall of the cylinder 11. The bottom of the clamping groove 112 penetrates the side wall of the cylinder 11 to form a narrow and long clamping slot 113.

[0030] The upper part of the longitudinal circuit board 32 is symmetrically provided with latches 321 on both sides thereof;

[0031] Specifically, the diameter of the transverse circuit board 31 is equal to the inner diameter of the cylinder 11; the width of the longitudinal circuit board 32 is equal to the inner diameter of the cylinder 11;

[0032] The circuit board assembly 3 is placed into the cylinder 11 from the opening on the cylinder, the two side plates of the longitudinal circuit board 32 are inserted into the clamping groove 112 and slide down along the axial direction of the cylinder 11 to the bottom plate of the cylinder 11, the latch tongue 321 slides into the clamping groove 112 and passes through the latching seam 113 to lock the longitudinal circuit board 32 in the cylinder 11, and the transverse circuit board 31 slides to the stop position on the horizontal boss 111, and the horizontal boss 111 supports the transverse circuit board 31.

[0033] Furthermore, if Figure 4 , Figure 6 and Figure 7 As shown, in order to facilitate and quickly assemble the circuit board assembly, no additional connector is required for connection. Two rectangular plug holes 311 are symmetrically arranged on the board body of the horizontal circuit board 31, and two plug blocks 322 are arranged on the top of the board body of the vertical circuit board 32. When assembling the circuit board assembly, the plug blocks 322 are inserted into the plug holes 311 of the horizontal circuit board from bottom to top, so that the vertical circuit board 32 and the horizontal circuit board 31 are vertically intersected and connected together.

[0034] Furthermore, in order to achieve a tight connection and circuit connectivity between the horizontal circuit board and the vertical circuit board, a first soldering pad 51 is provided on the bottom surface of the horizontal circuit board 31 located next to the socket 311, and a second soldering pad 52 is provided on the side surface of the vertical circuit board 31 located at the plug block 322. When the vertical circuit board 32 is plugged into the horizontal circuit board 31, the first soldering pad 51 and the second soldering pad 52 are soldered together using solder to fasten the horizontal circuit board 31 to the vertical circuit board 32, and at the same time, the circuit connection between the horizontal circuit board and the vertical circuit board is turned on.

[0035] Furthermore, in order to facilitate the installation and fixing of the lens, as Figure 3 , Figure 4 and Figure 5 As shown, two pins 21 extending downward are symmetrically arranged on the lower opening of the lens 2, and notches 312 are arranged on the left and right sides of the plate body of the horizontal circuit board 31. A gap 1A is arranged between the notch 312 and the inner cavity wall of the cylinder 11, and the lens 2 covers the upper opening of the cylinder. The pin 21 slides along the inner wall of the cylinder and passes through the gap 1A, and is interference fit with the gap 1A, and the lens 2 is fastened to the cylinder.

[0036] In order to facilitate the installation and fixing of the infrared human body sensing device on the sensing lamp, Figure 1 and Figure 5 As shown, an elastic fastener 114 is disposed on the cylinder 11 , and buckle patterns are provided on the surface of the elastic fastener 114 .

[0037] Specifically, the lens 2 is a Fresnel lens.

[0038] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An infrared human body sensing device, comprising a housing, a lens, a circuit board assembly and an infrared sensor; the housing comprises a cylinder with an upper opening, characterized in that: The circuit board assembly comprises a transverse circuit board and a longitudinal circuit board, wherein the longitudinal circuit board is vertically intersected and fixed on the bottom surface of the transverse circuit board; The inner cavity wall of the cylinder is provided with a horizontal boss and a longitudinal clamping groove, the bottom of the clamping groove penetrates the side wall of the cylinder to form a clamping seam; the upper part of the longitudinal circuit board is symmetrically provided with clamping tongues on both sides; The circuit board assembly is placed in the cylinder from the opening on the cylinder, the two side plates of the longitudinal circuit board are inserted into the clamping groove and slide down along the axial direction of the cylinder to the bottom of the cylinder, the latch slides into the clamping groove and passes through the latching seam to lock the longitudinal circuit board in the cylinder, the transverse circuit board moves to the horizontal boss stop position, the horizontal boss supports the transverse circuit board, and the lens cover is closed on the opening on the cylinder to seal the circuit board assembly in the cylinder.

2. The infrared human body sensing device according to claim 1, characterized in that: The transverse circuit board is circular, and its diameter is equal to the inner diameter of the cylinder; the longitudinal circuit board is rectangular, and its width is equal to the inner diameter of the cylinder.

3. An infrared human body sensing device according to claim 1 or 2, characterized in that: Two jacks are symmetrically arranged on the transverse circuit board, and two plug blocks are arranged on the top of the board body of the longitudinal circuit board; during assembly, the plug blocks are inserted into the jacks of the transverse circuit board from bottom to top, so that the longitudinal circuit board and the transverse circuit board are vertically intersected and connected together.

4. The infrared human body sensing device according to claim 3, characterized in that: A first soldering pad is arranged on the bottom surface of the horizontal circuit board next to the socket, and a second soldering pad is arranged on the side surface of the vertical circuit board at the plug block. When the plug block on the vertical circuit board is plugged into the socket of the horizontal circuit board, the first soldering pad and the second soldering pad are soldered together using solder, and the circuit connection between the horizontal circuit board and the vertical circuit board is turned on.

5. The infrared human body sensing device according to claim 4, characterized in that: Two pins extending downward are symmetrically arranged on the lower opening of the lens, notches are arranged on the left and right sides of the plate body of the horizontal circuit board, a gap is arranged between the notches and the inner cavity wall of the cylinder, the lens cover is closed on the upper opening of the cylinder, the pins slide along the inner wall of the cylinder, pass through the gap and interference fit with the gap, so that the lens is fastened to the upper opening of the cylinder.

6. The infrared human body sensing device according to claim 5, characterized in that: The infrared sensor is arranged at the center of the top surface of the horizontal circuit board.

7. The infrared human body sensing device according to claim 2, characterized in that: The lens is a Fresnel lens.

8. The infrared human body sensing device according to claim 2, characterized in that: Two symmetrical elastic fasteners are arranged on the cylinder, and buckle patterns are arranged on the surfaces of the elastic fasteners. The cylinder penetrates into the through hole on the lampshade from top to bottom, and the elastic fasteners and the lampshade are buckled together to fix the infrared human body sensing device on the sensing lamp.

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