WO2014048381A1

WO2014048381A1 - Shielding structure of passive infrared sensor and passive infrared sensor device having the shielding structure

Info

Publication number: WO2014048381A1
Application number: PCT/CN2013/084567
Authority: WO
Inventors: 陈明允
Original assignee: 东莞巨扬电器有限公司
Priority date: 2012-09-29
Filing date: 2013-09-29
Publication date: 2014-04-03
Also published as: CN202904038U

Abstract

A shielding structure of a passive infrared sensor and a passive infrared sensor device having the shielding structure. The shielding structure matches with a lens (14) and is provided with a movable part (162). A user can move the movable part (162) over the lens (14) to shield the range exposed to the outside, thus limiting the sensing range of the passive infrared sensor device. The shielding structure has the advantages of easy installation and reduced costs.

Description

Technical field

The present invention relates to the field of passive infrared sensing range, and more particularly to a mechanism type shielding structure for adjusting a passive infrared sensing range and a passive infrared sensing device having the shielding structure.

Passive Infrared Sensor (PIR) is a pyroelectric infrared sensor that uses the pyroelectric effect. Its action principle is a representative of the thermal type. The so-called pyroelectric effect is simply used. A phenomenon in which a charge changes due to a change in temperature. Therefore, it can be said that if there is no temperature change, the charge output signal cannot be generated. The main sensing method of the passive infrared sensor is to use the change of temperature to sense the movement of the object to be tested. For example, the moving body moves within the sensing range of the passive infrared sensor, and the sensing point on the passive infrared sensor is converted into a current signal output due to the change of temperature, and the signal can be turned on and the alarm is made. Loud and so on, therefore, passive infrared sensors are used in a wide range of applications.

In the sensing mode of the above situation, the sensing distance of the PIR is too close (about 1~2 meters), and the sensing point will not be enough. Therefore, the general solution is to use the convex lens to focus the light, and the human body will be farther away. The infrared energy is focused on the sensing point of the PIR component, which greatly increases the sensing distance. On the other hand, we combine the convex lenses together to form a lens array (Lens Arrays), which can add many sensing points. The current passive infrared sensor is used in conjunction with the lens.

However, it is now working to increase the sensing point of PIR, but in some applications, there is a need to limit the range of PIR sensing. For example, US Patent Publication No.: US 7438438, Chinese Patent Publication No.: CN2906312, etc. A well-known technology; in this case, how to limit the PIR sensing range with a lower cost and more optimized structural design is the development direction of this technology. Summary of the invention

In view of the deficiencies of the prior art, one of the objects of the present invention is to provide a shielding structure for a passive infrared sensor, and to adjust a passive infrared sensation disposed under the lens through a mechanism disposed on the lens. The sensing range of the device.

Another object of the present invention is to provide a shielding structure for a passive infrared sensor and a passive infrared sensing device having the shielding structure, wherein the shielding structure can be moved over the lens to shield the lens, thereby limiting the passive infrared sensor. The sensing range.

In order to achieve the above object, the technical solution adopted by the present invention is to provide a shielding structure of a passive infrared sensor, which can accommodate an inductive component including a passive infrared sensor, and the shielding structure of the passive infrared sensor includes: a seat body. Providing an accommodating space, and a first opening and a second opening respectively located above and below the accommodating space, wherein the base body includes a flange disposed adjacent to the first opening and protruding In the accommodating space, the passive infrared sensor is exposed in the first opening; and a shielding module abutting the flange and located above the sensing component, wherein the shielding module comprises an adjustable passive At least one adjustment masking component of the infrared range received by the infrared sensor.

Preferably, the seat body further includes a side wall, the side wall defines the accommodating space and a limiting component formed on the side wall, the sensing component abuts against the limiting component; wherein the limiting component The component is two parallel limiting slots or two pairs of parallel protruding ribs or a plurality of protruding blocks.

Preferably, the flange includes at least one stop block facing the screening module to limit the extent to which the adjustment shield assembly moves over the flange.

Preferably, the shielding module further includes a guiding structure, the guiding structure contacting the adjusting shielding component, wherein the adjusting shielding component is moved to the vicinity of the passive infrared sensor through the guiding structure to adjust the passive infrared sensor The range of infrared received.

Preferably, the adjustment mask assembly is made of a metal material as a solid structure.

The present invention also provides a passive infrared sensing device having a shielding structure, comprising: a passive infrared sensor comprising a sensing surface; a shielding module disposed adjacent to the passive infrared sensor and including a moving portion, the movement The portion can be moved to the sensing surface of the passive infrared sensor to limit the infrared range received by the sensing surface of the passive infrared sensor; and the base body provides an accommodation space for accommodating the passive infrared sensing The seat body includes a flange, and the shielding module abuts the flange, and the moving portion is movable on the flange to the sensing surface of the passive infrared sensor.

Preferably, the passive infrared sensing device with the shielding structure further comprises a lens, the lens abuts the flange and covers the sensing surface, and the shielding module shields at least a part of the lens, wherein the movement The portion can be adjusted to the extent that the lens is exposed when moving over the flange. Preferably, the passive infrared sensing device having a shielding structure further includes a substrate, the substrate is provided with the passive infrared sensor, wherein the base further includes a limiting component disposed in the receiving space to fix the substrate; The limiting component is two parallel limiting slots or two pairs of parallel protruding ribs or a plurality of protruding blocks.

Preferably, the shielding module is of a one-piece or modular type.

The present invention also provides a passive infrared sensing device having a shielding structure, comprising: a passive infrared sensing module including a lens and a passive infrared sensor disposed under the lens; and a shielding module including a moving portion and disposed on the a portion of the lens is exposed above the lens, the moving portion is movable to adjust an exposed area of the lens, wherein the lens and the shielding module both have a dome shape, and a pivot is disposed through the lens and the The top of the dome that shields the module.

Preferably, the passive infrared sensing device further includes a seat body, the seat body provides an accommodating space for accommodating at least a portion of the passive infrared sensing module, wherein the base body includes a guiding structure and the shielding module abuts the The guiding portion is movable on the guiding structure above the passive infrared sensor.

Preferably, a part of the lens is the seat body, and the guiding structure is formed on the lens.

Preferably, the passive infrared sensing module further includes a substrate for arranging the passive infrared sensor, wherein the base further includes a limiting component disposed in the receiving space to fix the substrate; wherein the limiting position The component is at least one limiting slot or at least one pair of parallel protruding ribs or a plurality of projections.

Preferably, the passive infrared sensing module further comprises a circuit board for fixing the lens, the passive infrared sensor and the shielding module.

Preferably, the moving part is of a one-piece or modular type.

The shielding structure of the passive infrared sensor of the present invention can be applied to a passive infrared sensing device, which can adjust or limit the sensing range of the passive infrared sensor disposed under the lens through a mechanism disposed on the lens, and is easy to install. And the advantages of low cost. DRAWINGS

1 is a schematic plan view showing a shielding structure of a passive infrared sensor according to a first embodiment of the present invention. Fig. 2 is a bottom plan view showing the shielding structure of the passive infrared sensor of the first embodiment of the present invention.

FIG. 3 is a schematic perspective view of a shielding structure of a passive infrared sensor according to a first embodiment of the present invention. 4 is a perspective view showing another embodiment of the passive infrared sensor of the first embodiment of the present invention.

Fig. 5 is a partially exploded perspective view showing the shielding structure accommodating sensor of the passive infrared sensor of the first embodiment of the present invention.

Fig. 6 is another perspective view showing the shielding structure of the passive infrared sensor of the first embodiment of the present invention.

Fig. 7 is a schematic view showing the sensing part of the passive infrared sensor of the second embodiment of the present invention.

8 is a cross-sectional view of a passive infrared sensing module and a shielding module according to a third embodiment of the present invention. FIG. 9 is a schematic top plan view of a passive infrared sensing module according to a third embodiment of the present invention.

FIG. 10 is a schematic top plan view of a passive infrared sensing module according to a fourth embodiment of the present invention.

FIG. 1 is a cross-sectional view showing a passive infrared sensing module and a shielding module according to a fifth embodiment of the present invention;

detailed description

1 is a schematic plan view showing a shielding structure of a passive infrared sensor according to a first embodiment of the present invention. 2, FIG. 3 and FIG. 4 are respectively a bottom view of the shielding structure of the passive infrared sensor according to the first embodiment of the present invention, and a perspective view of different angles. Referring to Figure 1, the shielding structure of a passive infrared sensor includes a body 12 and a shielding module 16, and a lens 14 is located between the body 12 and the shielding module 16.

Referring to FIG. 1 , FIG. 2 , FIG. 3 and FIG. 4 , the base 12 includes a sidewall 126 to define and provide an accommodating space 121 , and a first opening 123 and a first portion respectively located above and below the accommodating space 121 . Two openings 125. Next, a flange 122 is disposed adjacent to the first opening 123 and protrudes into the accommodating space 121, and two pairs of parallel protruding ribs 128 are formed on the sidewall 126, wherein a sensing of the passive infrared sensor 182 is included. The component 18 is secured to the sidewall 126 by two pairs of parallel protruding ribs 128.

Moreover, the lens 14 abuts against the flange 122 and covers the first opening 123, and the shielding module 16 abuts against the flange 122 and is located on at least a portion of the lens 14, wherein the shielding module 16 includes the adjustable lens 14 exposed At least one of the outer extents adjusts the shield assembly 162.

It should be noted that the present invention is not limited to the two pairs of parallel protruding ribs 128 abutting the sensing component 18, and two parallel limiting slots or a plurality of protruding blocks may be disposed on the sidewall 126. Such as the aforementioned ribs, limit grooves or protrusions The arrangement is in the form of an embodiment of the limiting member, whereby the sensing member 18 is fixed thereto without departing from the scope of the invention.

Fig. 5 is a partially exploded perspective view showing the shielding structure accommodating sensor of the passive infrared sensor of the first embodiment of the present invention. Referring also to Figures 1, 2, 3, 4 and 5, the sensing component 18 includes a passive infrared sensor 182, a substrate formed by a narrow portion 1842 and a wide portion 1844, and a pivot 186. In this embodiment, the substrate may be a circuit board. After the wide portion 1844 of the sensing component 18 is fixed to the sidewall 126 of the base 12, the wide portion 1844 is located in the accommodating space 121, and the partial wide portion 1844 is exposed to the second portion. The opening 125, while the narrow portion 1842 above the wide portion 1844 protrudes into the first opening 123.

Secondly, the two sides of the wide portion 1844 can abut against the flange 122 but leave a gap. The dome-shaped lens 14 includes the lens protrusion 142 to enter the gap, and the difference between the wide portion 1844 and the narrow portion 1842. Abuts against the flange 122. Furthermore, the passive infrared sensor 182 and the pivot 186 are disposed in the narrow portion 1842 such that the passive infrared sensor 182 and the pivot 186 are exposed to the first opening 123 with the narrow portion 1842.

Moreover, in this embodiment, the lens 14, the adjustment shielding assembly 162 and the shielding module 16 all have a dome shape, and respectively provided with perforations 141, 1621, 161 at the top of the dome, wherein the perforations 141, 1621, 161 can be used for arranging The pivot 186 is used to enable the lens 14, the adjustment shield assembly 162, and the shield module 16 to more stably bond the base 12 and the sensing member 18.

When the lens 14 , the adjustment shielding component 162 and the shielding module 16 are sequentially coupled to the base 12 and the sensing component 18 from the inside to the outside, the adjustment shielding component 162 and the shielding module 16 are located on a part of the lens 14 , and the passive infrared sensor 182 is The lens 14 is exposed to the outside range. The shielding module 16 includes an adjustment shielding assembly 162 as a moving portion, whereby the user can move the adjustment shielding assembly 162 on the flange 122 of the base 12 to adjust the exposed position of the lens 14 and the exposed area, such as Figure 6 shows.

Moreover, the passive infrared sensor 182 introduces external infrared rays into the sensing surface 1822 of the passive infrared sensor 182 through the exposed range of the lens 14. Therefore, the adjustment of the shielding member 162 to adjust the exposure of the lens 14 to the outside is equivalent to The moving portion of the over-shadow module 16 is moved to the sensing surface 1822 of the passive infrared sensor 182 to limit the range of infrared light received by the sensing surface 1822 of the passive infrared sensor 182. Furthermore, a limit block 124 can be disposed on the flange 122 toward the shield module 16 to limit the extent to which the shield assembly 162 is moved over the flange 122. Further, the shielding module 16 is made of a metal material as a solid structure to achieve the purpose of shielding infrared rays.

It can be understood that the adjustment of the shielding assembly 162 is not limited to moving over the flange 122 to shield the exposed range of the lens 14 . Other methods, such as the surface of the shielding module 16 facing the adjustment shielding assembly 162 The guide structure contacts the adjustment shield assembly 162, and the adjustment shield assembly 162 is moved through the guide structure to a range in which the lens 14 is exposed to shield at least a portion of the lens 14 from being exposed to the outside.

Moreover, the shielding module 16 can also be a movable part as a whole, that is, the shielding module 16 is a two-piece adjusting shielding component, and the movement of the shielding component on the flange 122 is adjusted by two pieces to adjust the position where the lens 14 is shielded and Scope, in this way, the angle and orientation of the sensing component 18 that can be sensed can be adjusted. In this case, a passive infrared sensor 182 can be disposed on both sides of the narrow portion 1842 of the substrate, so that the user can simultaneously move the two adjustment mask assemblies 162 as needed to limit the range of infrared rays received by the passive infrared sensor 182.

Moreover, the shielding module 16 includes a modular structure, but can also be configured as a one-piece structure. For example, the one-piece shielding module (not shown) has a dome shape and a detecting opening, and is a one-piece The shield module of the structure can also be rotated on the flange 122. With this arrangement, the user can select a specific portion of the lens 14 to pass through the detection opening by rotating the one-piece shielding module to adjust the position of the detection opening of the one-piece shielding module. And was revealed. In this way, the sensed position of the sensing member 18 can be adjusted. In addition, it is also possible to make a multi-piece adjustment masking assembly that can be folded and closed like a collapsible hand-held power fan without departing from the scope of the present invention.

According to the above, the shielding module 16 can also be a movable part or a part movable. The sensing component can also be in other aspects. Referring to FIG. 7, the sensing component 28 can be a combined substrate, which includes two The angled substrate allows the passive infrared sensor 282 to be placed horizontally in the housing. Such an inductive component 28 can also be used to limit or adjust the range of infrared radiation received by the passive infrared sensor 282.

Figure 8 is a cross-sectional view showing a passive infrared sensing module and a shielding module according to a third embodiment of the present invention. FIG. 9 is a top plan view of a passive infrared sensing module according to a third embodiment of the present invention. Referring to FIG. 8, 9, the passive infrared sensing module includes a lens 34 and a passive infrared sensor 382 located below the lens 34. Secondly, the lens 34 and the passive infrared sensor 382 are disposed on a substrate 384. The lens 34 forms a flange 342 adjacent to the substrate 384 as a base for the shielding module 36. Moreover, the flange 342 can include a guiding structure 386 to guide or guide a moving portion 362 of the capping module 36, wherein the guiding structure 386 can be an annular groove surrounding the lens 34.

FIG. 10 is a schematic top plan view of a passive infrared sensing module according to a fourth embodiment of the present invention. The difference from the third embodiment is that only the flange 442 provided by the integrally formed lens 44 is small, so that the guiding structure 486 for guiding the shielding module (not shown) is a separate two parts. Under, can be shielded Other guiding structures are provided as described above, and are not described herein.

Fig. 1 is a schematic cross-sectional view showing a passive infrared sensing module and a shielding module according to a fifth embodiment of the present invention. Similar to the third embodiment, the passive infrared sensing module includes a lens 54 and a passive infrared sensor 582 located below the lens 54. The lens 54 and the passive infrared sensor 582 are disposed on a circuit board 584. The difference from the third embodiment is that the shielding module 56 is disposed on the circuit board 584, that is, the body of the shielding module 56 is provided by the circuit board 584.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the claims of the present invention, and all equivalent changes or modifications which are not departing from the spirit of the present invention should be included in the present invention. Within the scope of the invention.

Claims

Rights request

A shielding structure for a passive infrared sensor, comprising: an inductive component comprising a passive infrared sensor, the shielding structure of the passive infrared sensor comprising:

a seat body, which provides an accommodating space, and a first opening and a second opening respectively located above and below the accommodating space, wherein the base body includes a flange disposed near the first opening And protruding in the accommodating space, the passive infrared sensor is exposed in the first opening;

a shielding module that abuts the flange and is located above the sensing component, wherein the shielding module includes at least one adjustment shielding component that can adjust a range of infrared rays received by the passive infrared sensor.

The shielding structure of the passive infrared sensor according to claim 1, wherein the base further comprises a side wall defining the receiving space and a limiting component formed on the sidewall, the sensing The component abuts against the limiting component; wherein the limiting component is two parallel limiting slots or two pairs of parallel protruding ribs or a plurality of protrusions.

3. The shielding structure of a passive infrared sensor according to claim 1, wherein the flange includes at least one limiting block facing the shielding module to limit a range in which the adjustment shielding assembly moves on the flange.

The shielding structure of the passive infrared sensor of claim 1 , wherein the shielding module further comprises a guiding structure, the guiding structure contacting the adjusting shielding component, wherein the adjusting shielding component is moved to the guiding structure The vicinity of the passive infrared sensor adjusts the infrared range received by the passive infrared sensor.

The shielding structure of the passive infrared sensor according to claim 1, wherein the adjustment shielding component is made of a metal material as a solid structure.

6. A passive infrared sensing device having a shielding structure, comprising:

a passive infrared sensor comprising a sensing surface;

a shielding module disposed adjacent to the passive infrared sensor and including a moving portion, the moving portion being movable to the sensing surface of the passive infrared sensor to limit receiving of the sensing surface of the passive infrared sensor Infrared range;

a seat body, which provides an accommodating space for accommodating the passive infrared sensor, wherein the base body includes a flange, and the shielding module abuts the flange, and the moving portion is movable on the flange to The sensing surface of the passive infrared sensor.

7. The passive infrared sensing device with a shielding structure according to claim 6, further comprising a lens that abuts against the flange and covers the sensing surface, and the shielding module shields at least a portion of the lens Where the lens is exposed to the outside when the moving portion is movable over the flange.

The passive infrared sensing device with a shielding structure according to claim 6, further comprising a substrate, wherein the substrate is provided with the passive infrared sensor, wherein the base further comprises a first one disposed in the receiving space to fix the substrate The limiting component; wherein the limiting component is two parallel limiting slots or two pairs of parallel protruding ribs or a plurality of protruding blocks.

The passive infrared sensing device with a shielding structure according to claim 6, wherein the shielding module is of a one-piece or modular type.

10. A passive infrared sensing device having a shielding structure, comprising:

a passive infrared sensing module comprising a lens and a passive infrared sensor disposed under the lens;

a shielding module comprising a moving portion and disposed above the lens and exposing a portion of the lens, the moving portion being movable to adjust an exposed area of the lens;

The lens and the shielding module each have a dome shape, and a pivot is disposed through the lens and the top of the dome of the shielding module.

The passive infrared sensing device with a shielding structure according to claim 10, further comprising a seat body, the seat body providing an accommodating space for accommodating at least a part of the passive infrared sensing module, wherein the seat body comprises a guide The guiding structure and the shielding module abut on the guiding structure, and the moving portion can move on the guiding structure above the passive infrared sensor.

The passive infrared sensing device with a shielding structure according to claim 11, wherein a part of the lens is the seat body, and the guiding structure is formed on the lens.

The passive infrared sensing device with a shielding structure according to claim 11, wherein the passive infrared sensing module further comprises a substrate for arranging the passive infrared sensor, wherein the housing further comprises a housing disposed in the receiving space. And a limiting component for fixing the substrate; wherein the limiting component is at least one limiting slot or at least one pair of parallel protruding ribs or a plurality of protrusions.

14. The passive infrared sensing device with a shielding structure according to claim 10, wherein the passive The infrared sensing module further includes a circuit board that fixes the lens, the passive infrared sensor, and the shielding module.

The passive infrared sensing device with a shielding structure according to claim 10, wherein the moving portion is of a one-piece or modular type.