Infrared sensor

Abstract

The utility model provides an infrared sensor, which comprises a shell, a support structure and a shielding structure, and is characterized in that the shell is provided with an accommodating cavity and a window communicated with the accommodating cavity; the support structure is arranged in the containing cavity, a Fresnel lens is arranged on the side, facing the window, of the support structure and located at the window, and a sensor or a circuit board used for infrared induction is arranged on the side, back to the window, of the support structure. The shielding structure is arranged on the side, provided with the Fresnel lens, of the support structure in a sliding mode, and the shielding structure is provided with a shielding area and an avoiding area; wherein the shielding structure slides to enable at least one part of the shielding area and / or at least one part of the avoiding area to slide into the area where the Fresnel lens is located. According to the utility model, the problem that the sensing area of the infrared sensor in the prior art cannot be effectively shielded is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensing equipment, in particular to an infrared sensor. Background Art

[0002] In the prior art, the sensing area of ​​the infrared sensor cannot be adjusted, and when in use, it will cause false alarms because it does not match the actual area to be monitored. A common solution is to cover part of the sensing area by pasting paper, but this method relies on pasting technology, is difficult to operate, and has low accuracy. Utility Model Content

[0003] The main purpose of the utility model is to provide an infrared sensor to solve the problem that the sensing area of ​​the infrared sensor in the prior art cannot be effectively shielded.

[0004] In order to achieve the above-mentioned purpose, the utility model provides an infrared sensor, including a shell, a support structure and a shielding structure, the shell having a accommodating cavity and a window connected to the accommodating cavity; the support structure is arranged in the accommodating cavity, a Fresnel lens is arranged on the side of the support structure facing the window, and the Fresnel lens is located at the window, and a sensor or a circuit board for infrared sensing is arranged on the side of the support structure facing away from the window; the shielding structure is slidably arranged on the side of the support structure having the Fresnel lens, and the shielding structure has a shielding area and an avoidance area; wherein the shielding structure slides so that at least a part of the shielding area and / or at least a part of the avoidance area slides into the area where the Fresnel lens is located.

[0005] Further, at least the outer contour line of the avoidance area coincides with the projection contour line of the Fresnel lens; or at least the outer contour line of the avoidance area is located on the outer peripheral side of the projection contour line of the Fresnel lens.

[0006] Furthermore, the shielding area includes a first sub-shielding area and a second sub-shielding area. In the sliding direction of the shielding structure, the first sub-shielding area and the second sub-shielding area are respectively located on both sides of the avoidance area, and at the same time only at least a portion of the first sub-shielding area or at least a portion of the second sub-shielding area can slide into the area where the Fresnel lens is located.

[0007] Furthermore, the shell includes a first subshell and a second subshell, the first subshell has a receiving groove and a window communicating with the receiving groove; the second subshell cover is arranged at the notch of the receiving groove to enclose a receiving cavity with the first subshell.

[0008] Furthermore, the shielding structure includes a shielding plate body and an adjustment key, wherein the shielding plate body has a shielding area and an avoidance area; the adjustment key is protrudingly arranged on a side surface of the shielding plate body facing the second sub-shell, and a guide hole is opened on the second sub-shell, which extends along the sliding direction of the shielding structure. The adjustment key is arranged to pass through the guide hole so that the operator can push the adjustment key to slide the shielding plate body.

[0009] Furthermore, the shielding plate body and the adjustment key are integrally formed.

[0010] Furthermore, in the sliding direction of the shielding structure, at least the extension length of the guide hole is greater than the length of the avoidance area.

[0011] Furthermore, the Fresnel lens has a plurality of sensing partitions, and the plurality of sensing partitions are arranged sequentially along the sliding direction of the shielding structure; wherein, each time the adjustment key is pushed, the partial shielding area that slides into the area where the Fresnel lens is located can shield one sensing partition.

[0012] Furthermore, the shielding area includes a first sub-shielding area and a second sub-shielding area, and in the sliding direction of the shielding structure, the first sub-shielding area and the second sub-shielding area are respectively located on both sides of the avoidance area; wherein, at least one of the first sub-shielding area and the second sub-shielding area has multiple shielding partitions, and the multiple shielding partitions correspond one-to-one to the multiple sensing partitions, so that one shielding partition is used to shield one sensing partition.

[0013] Furthermore, the surface of the side where the adjustment key passes through the guide hole has a convex structure.

[0014] Furthermore, the support structure is provided with a guide slot, the shielding structure is slidably arranged in the guide slot, and the slot wall surface of the guide slot is provided with a limiting protrusion, so that when the shielding structure slides to a preset position, the limiting protrusion provides a limiting effect on the shielding structure.

[0015] By applying the technical solution of the utility model, a shielding structure is slidably arranged on a side of a support structure having a Fresnel lens, and the shielding structure is arranged to have a shielding area and an avoidance area. In this way, by sliding the shielding structure, at least a part of the shielding area and / or at least a part of the avoidance area slides into the area where the Fresnel lens is located. Specifically, when the avoidance area slides into the area where the Fresnel lens is located, the avoidance area plays a role of avoiding the sensing area of ​​the infrared sensor. When at least a part of the shielding area slides into the area where the Fresnel lens is located, it plays a role of shielding the sensing area of ​​the infrared sensor, thereby ensuring that the sensing area of ​​the infrared sensor can achieve the purpose of adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of the exploded structure of an infrared sensor according to an optional embodiment of the utility model is shown;

[0018] Figure 2 Shows Figure 1 A schematic diagram of the cross-sectional structure of the infrared sensor in FIG.

[0019] Figure 3 Shows Figure 2 A schematic diagram of a state in which the avoidance area of ​​the shielding structure of the infrared sensor is within the sensing area;

[0020] Figure 4 Shows Figure 3 A schematic diagram of a state structure in which the first sub-blocking area of ​​the blocking structure blocks a sensing area;

[0021] Figure 5 Shows Figure 4 A schematic diagram of a state structure in which the first sub-blocking area of ​​the blocking structure blocks two sensing areas;

[0022] Figure 6 Shows Figure 5 A schematic diagram of a state structure in which the first sub-blocking area of ​​the blocking structure blocks three sensing areas;

[0023] Figure 7 Shows Figure 3 A schematic diagram of a state structure in which the second sub-blocking area of ​​the blocking structure blocks a sensing area;

[0024] Figure 8 Shows Figure 4 A schematic diagram of a state structure in which the second sub-blocking area of ​​the blocking structure blocks two sensing areas;

[0025] Fig. 9 Shows Figure 5 Schematic diagram of the state structure in which the second sub-blocking area of ​​the blocking structure blocks three sensing areas.

[0026] The above drawings include the following reference numerals:

[0027] 10. housing; 11. accommodating chamber; 12. window; 13. first sub-housing; 131. accommodating groove; 14. second sub-housing; 141. guide hole;

[0028] 20. Support structure;

[0029] 30. Fresnel lens; 40. Circuit board;

[0030] 50. Shielding structure; 51. Shielding area; 511. First sub-shielding area; 512. Second sub-shielding area; 52. Avoidance area; 53. Shielding plate body; 54. Adjustment key; 541. Protruding structure. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In order to solve the problem that the sensing area of ​​the infrared sensor in the prior art cannot be effectively shielded, the utility model provides an infrared sensor.

[0033] like Figures 1 to 9 As shown, the infrared sensor includes a shell 10, a support structure 20 and a shielding structure 50, the shell 10 has a accommodating cavity 11 and a window 12 connected to the accommodating cavity 11; the support structure 20 is arranged in the accommodating cavity 11, and a Fresnel lens 30 is arranged on the side of the support structure 20 facing the window 12, and the Fresnel lens 30 is located at the window 12, and a sensor or a circuit board 40 for infrared sensing is arranged on the side of the support structure 20 facing away from the window 12; the shielding structure 50 is slidably arranged on the side of the support structure 20 having the Fresnel lens 30, and the shielding structure 50 has a shielding area 51 and an avoidance area 52; wherein the shielding structure 50 slides so that at least a portion of the shielding area 51 and / or at least a portion of the avoidance area 52 slides into the area where the Fresnel lens 30 is located.

[0034] By slidably arranging the shielding structure 50 on the side of the support structure 20 having the Fresnel lens 30, and at the same time arranging the shielding structure 50 into a structural form having a shielding area 51 and an avoidance area 52, by sliding the shielding structure 50, at least a portion of the shielding area 51 and / or at least a portion of the avoidance area 52 slides into the area where the Fresnel lens 30 is located. Specifically, when the avoidance area 52 slides into the area where the Fresnel lens 30 is located, the avoidance area 52 plays a role in avoiding the sensing area of ​​the infrared sensor. When at least a portion of the shielding area 51 slides into the area where the Fresnel lens 30 is located, it plays a role in shielding the sensing area of ​​the infrared sensor, thereby ensuring that the sensing area of ​​the infrared sensor can achieve the purpose of adjustment.

[0035] It should be noted that, in the present application, at least the outer contour of the avoidance area 52 coincides with the projection contour of the Fresnel lens 30. In this way, the avoidance area 52 effectively avoids the sensing area of ​​the infrared sensor.

[0036] Of course, at least the outer contour line of the avoidance area 52 may be located on the outer peripheral side of the projection contour line of the Fresnel lens 30 .

[0037] like Figures 1 to 9 As shown, the shielding area 51 includes a first sub-shielding area 511 and a second sub-shielding area 512. In the sliding direction of the shielding structure 50, the first sub-shielding area 511 and the second sub-shielding area 512 are respectively located on both sides of the avoidance area 52, and at the same time, only at least a portion of the first sub-shielding area 511 or at least a portion of the second sub-shielding area 512 can slide into the area where the Fresnel lens 30 is located.

[0038] Specifically, if Figures 3 to 6 As shown, Figure 3 The avoidance area 52 in the image is within the sensing area and has no shielding effect. Figure 4 When the shielding structure 50 slides downward one grid along its sliding direction, the first sub-shielding area 511 slides into the sensing area one grid, thereby shielding the sensing area within one grid. Figure 5 When the shielding structure 50 slides downward by two grids along its sliding direction, the first sub-shielding area 511 slides into the sensing area by two grids, thereby shielding the sensing area within the two grids; Figure 6 When the shielding structure 50 slides downward three squares along its sliding direction, the first sub-shielding area 511 slides into the sensing area three squares, thereby shielding the sensing area within the three squares.

[0039] Of course, the shielding structure 50 can also slide upward along its sliding direction, so that the second sub-shielding area 512 gradually slides into the sensing area one by one, as shown in FIG. Figures 7 to 9 As shown, Figure 7 When the shielding structure 50 in the embodiment slides upward one grid along its sliding direction, the second sub-shielding area 512 slides one grid into the sensing area, thereby shielding the sensing area within one grid. Figure 8 When the shielding structure 50 in the embodiment slides upward by two squares along its sliding direction, the second sub-shielding area 512 slides into the sensing area by two squares, thereby shielding the sensing area within the two squares; Fig. 9 When the shielding structure 50 slides upward three grids along its sliding direction, the second sub-shielding area 512 slides into the sensing area three grids, thereby shielding the sensing area within the three grids.

[0040] like Figure 1 and Figure 2 As shown, the housing 10 includes a first sub-housing 13 and a second sub-housing 14, the first sub-housing 13 has a receiving groove 131 and a window 12 connected to the receiving groove 131; the second sub-housing 14 is covered at the notch of the receiving groove 131 to enclose the receiving cavity 11 with the first sub-housing 13; the shielding structure 50 includes a shielding plate body 53 and an adjustment key 54, the shielding plate body 53 has a shielding area 51 and an avoidance area 52, the adjustment key 54 is protrudingly arranged on a side surface of the shielding plate body 53 facing the second sub-housing 14, the second sub-housing 14 is provided with a guide hole 141, the guide hole 141 extends along the sliding direction of the shielding structure 50, and the adjustment key 54 is arranged to penetrate the guide hole 141, so that the operator can push the adjustment key 54 to slide the shielding plate body 53. In this way, by setting the housing 10 as a split structure including the first sub-housing 13 and the second sub-housing 14, the assembly of the entire infrared sensor is facilitated, ensuring the convenience of assembly of the infrared sensor.

[0041] Preferably, the shielding plate body 53 and the adjustment key 54 are integrally formed.

[0042] like Figure 1 As shown, in the sliding direction of the shielding structure 50 , at least the extension length of the guide hole 141 is greater than the length of the avoidance area 52 .

[0043] It should be noted that, in the present application, the Fresnel lens 30 has a plurality of sensing partitions, and the plurality of sensing partitions are sequentially arranged along the sliding direction of the shielding structure 50; wherein, each time the adjustment key 54 is pushed, the partial shielding area 51 that slides into the area where the Fresnel lens 30 is located can shield one sensing partition. In this way, the adjustment accuracy of the infrared sensor is ensured.

[0044] like Figures 1 to 9As shown, the shielding area 51 includes a first sub-shielding area 511 and a second sub-shielding area 512. In the sliding direction of the shielding structure 50, the first sub-shielding area 511 and the second sub-shielding area 512 are respectively located on both sides of the avoidance area 52; wherein, at least one of the first sub-shielding area 511 and the second sub-shielding area 512 has a plurality of shielding partitions, and the plurality of shielding partitions correspond one-to-one with the plurality of sensing partitions, so that one shielding partition is used to shield one sensing partition. In this way, it is ensured that the operator can adjust the sensing range of the sensing area by one grid each time the adjustment key 54 is pushed, thereby ensuring the adjustment accuracy of the infrared sensor.

[0045] like Figure 1 and Figure 2 As shown, the surface of the adjusting key 54 passing through the guide hole 141 has a protruding structure 541. This is conducive to increasing the friction between the adjusting key 54 and the operator's finger, thereby ensuring the reliability of the operator's pushing of the adjusting key 54.

[0046] It should be noted that in the present application, the support structure 20 has a guide slot, the shielding structure 50 is slidably arranged in the guide slot, and the slot wall of the guide slot has a limiting protrusion, so that when the shielding structure 50 slides to the preset position, the limiting protrusion provides a limiting effect on the shielding structure 50. In this way, the stopping stability of the shielding structure 50 when it slides to the preset position is ensured.

[0047] Furthermore, the limiting protrusion is telescopically arranged, and when the shielding structure 50 slides to a preset position, the limiting recessed hole on the shielding structure 50 is aligned with the limiting protrusion, so that the limiting protrusion extends into the limiting recessed hole, thereby realizing the limiting effect on the shielding structure 50.

[0048] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0049] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0050] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0053] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An infrared sensor, characterized in that: include: A housing (10), the housing (10) comprising a receiving chamber (11) and a window (12) communicating with the receiving chamber (11); A support structure (20), the support structure (20) being arranged in the accommodating cavity (11), a Fresnel lens (30) being arranged on a side of the support structure (20) facing the window (12), and the Fresnel lens (30) being located at the window (12), and a sensor or a circuit board (40) for infrared sensing being arranged on a side of the support structure (20) facing away from the window (12); A shielding structure (50), the shielding structure (50) being slidably arranged on a side of the support structure (20) having the Fresnel lens (30), the shielding structure (50) having a shielding area (51) and an avoidance area (52); The shielding structure (50) slides so that at least a portion of the shielding area (51) and / or at least a portion of the avoidance area (52) slide into the area where the Fresnel lens (30) is located.

2. The infrared sensor according to claim 1, characterized in that: At least the outer contour line of the avoidance area (52) coincides with the projection contour line of the Fresnel lens (30); or, At least the outer contour line of the avoidance area (52) is located on the outer peripheral side of the projection contour line of the Fresnel lens (30).

3. The infrared sensor according to claim 1, characterized in that: The shielding area (51) comprises: A first sub-shielding area (511) and a second sub-shielding area (512), in the sliding direction of the shielding structure (50), the first sub-shielding area (511) and the second sub-shielding area (512) are respectively located on both sides of the avoidance area (52), and at the same time, only at least a part of the first sub-shielding area (511) or at least a part of the second sub-shielding area (512) can slide into the area where the Fresnel lens (30) is located.

4. The infrared sensor according to claim 1, characterized in that: The housing (10) comprises: A first sub-shell (13), the first sub-shell (13) having a receiving groove (131) and the window (12) communicating with the receiving groove (131); A second sub-shell (14), wherein the second sub-shell (14) is covered at the notch of the accommodating groove (131) to enclose the accommodating cavity (11) together with the first sub-shell (13).

5. The infrared sensor according to claim 4, characterized in that: The shielding structure (50) comprises: A shielding plate body (53), wherein the shielding plate body (53) comprises the shielding area (51) and the avoidance area (52); An adjustment key (54), the adjustment key (54) is protrudingly arranged on a side surface of the shielding plate body (53) facing the second sub-shell (14), and a guide hole (141) is opened on the second sub-shell (14), and the guide hole (141) extends along the sliding direction of the shielding structure (50). The adjustment key (54) is arranged to pass through the guide hole (141) so that an operator can push the adjustment key (54) to slide the shielding plate body (53).

6. The infrared sensor according to claim 5, characterized in that: In the sliding direction of the shielding structure (50), at least the extension length of the guide hole (141) is greater than the length of the avoidance area (52).

7. The infrared sensor according to claim 5, characterized in that: The Fresnel lens (30) has a plurality of sensing partitions, and the plurality of sensing partitions are arranged in sequence along the sliding direction of the shielding structure (50); Wherein, each time the adjustment key (54) is pushed, part of the shielding area (51) that slides into the area where the Fresnel lens (30) is located can shield one of the sensing partitions.

8. The infrared sensor according to claim 7, characterized in that: The shielding area (51) comprises: A first sub-shielding area (511) and a second sub-shielding area (512), wherein in the sliding direction of the shielding structure (50), the first sub-shielding area (511) and the second sub-shielding area (512) are respectively located on two sides of the avoidance area (52); At least one of the first sub-blocking area (511) and the second sub-blocking area (512) has a plurality of blocking partitions, and the plurality of blocking partitions correspond one-to-one to the plurality of sensing partitions, so that one blocking partition is used to block one sensing partition.

9. The infrared sensor according to claim 5, characterized in that: The surface of the adjusting key (54) on the side where it passes through the guide hole (141) has a protruding structure (541).

10. The infrared sensor according to any one of claims 1 to 8, characterized in that: The support structure (20) is provided with a guide slot, the shielding structure (50) is slidably arranged in the guide slot, and the slot wall surface of the guide slot is provided with a limiting protrusion, so that when the shielding structure (50) slides to a preset position, the limiting protrusion provides a limiting effect on the shielding structure (50).

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