Infrared receiving device with shielding shell and infrared receiving equipment

Abstract

The utility model relates to the technical field of signal receiving equipment, and discloses an infrared receiving device with a shielding shell and infrared receiving equipment. The infrared receiving device with the shielding shell comprises a metal lead frame, the metal lead frame comprises a mounting part and a shielding part, the mounting part is provided with a light-sensitive element and a signal processing unit, the signal processing unit is electrically connected with the light-sensitive element through a connecting wire, and the signal processing unit is electrically connected with the light-sensitive element through a connecting wire. The signal processing unit is electrically connected with three pins on one side of the mounting part through connecting wires respectively; the packaging protection layer is arranged on the metal lead frame and is used for covering, packaging and protecting the photosensitive element and the signal processing unit; and the shielding part of the metal lead frame can form a shielding shell to cover the outer side of the packaging protection layer. According to the infrared receiving device with the shielding shell, the shielding shell does not need to be manually installed and welded additionally, the thickness is reduced, the overall size is greatly reduced, and automatic production can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of signal receiving equipment, in particular to an infrared receiving device with a shielding shell and an infrared receiving equipment. Background Art

[0002] In recent years, as infrared receiving modules are widely used in many fields such as household appliances, audio, medical instruments, lighting, automobiles, drones, and military, the packaging technology of infrared receiving modules has developed rapidly. Infrared receiving modules in the prior art are generally implemented by molding using a lead frame. The receiving head is first sealed with glue, and then a metal shell is set on the outside to shield the external electromagnetic interference signal. The electromagnetic shielding cover is made by using an external metal shell. The metal shell needs to be manually fixed on the receiving head, and the external metal shell needs to be welded to the ground pin of the receiving head, which increases labor costs and process steps, and the size of the module is bloated.

[0003] Therefore, the packaging method of manually installing a metal shell outside the module receiving head in the prior art is complex and costly, and the module is bulky. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to provide an infrared receiving device and an infrared receiving equipment with a shielding shell, which can solve the problem that the packaging method of the prior art requires manual installation of a metal shell outside the module receiving head, which is complex and costly to process and has a bloated module size.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] An infrared receiving device with a shielding shell, comprising:

[0007] A metal lead frame, the metal lead frame comprising a mounting portion and a shielding portion, the mounting portion being provided with a photosensitive element and a signal processing unit, the photosensitive element being used to receive an optical signal, the signal processing unit being electrically connected to the photosensitive element via a connecting wire, and the signal processing unit being electrically connected to three pins on one side of the mounting portion via the connecting wires;

[0008] The encapsulation protective layer is arranged on the metal lead frame, and is used to cover, encapsulate and protect the photosensitive element and the signal processing unit; the shielding part of the metal lead frame can form a shielding shell covering the outside of the encapsulation protective layer, and the encapsulation protective layer is also used to isolate the shielding part from the photosensitive element, the signal processing unit and the connecting wire.

[0009] Preferably, the encapsulation protection layer is provided with a raised light-focusing portion.

[0010] Preferably, a window is provided on the shielding portion of the metal lead frame, and the window is aligned with the focusing portion.

[0011] Preferably, the window is in the shape of a circle, a square, an ellipse, a mesh, or a combination of multiple shapes.

[0012] Preferably, the protruding height of the light-focusing portion does not exceed the outer side of the window.

[0013] Preferably, the shielding portion is composed of a connecting portion, a front panel and a side panel, the connecting portion can be bent and arranged at the end of the mounting portion to connect the mounting portion and the front panel, and the side panel is arranged on the side of the front panel.

[0014] Preferably, a bending mark is provided between the side panel and the front panel, and the side panel can be bent and arranged on the side of the front panel.

[0015] Preferably, the side panels are bent between the front panels and arranged on the side faces of the front panels, and a fixed angle is formed between the side panels and the front panels.

[0016] Preferably, the side panel includes at least two sides.

[0017] The utility model also provides an infrared receiving device, which is provided with at least one infrared receiving device with a shielding shell as described in any one of the items.

[0018] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0019] The infrared receiving device with a shielding shell provided by the utility model uses a metal lead frame as a part of the shielding shell, and the shielding shell is directly connected to the pins of the product, so that the product does not need to be manually installed with a shielding shell and welded, the thickness is reduced, the overall volume is greatly reduced, the space arrangement is more reasonable, and automated production can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an infrared receiving device with a shielding shell provided by an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of a partial explosion structure of an infrared receiving device with a shielding shell provided by an embodiment of the utility model;

[0022] Figure 3 This is a schematic structural diagram of a first unfolded state of an infrared receiving device with a shielding shell provided by an embodiment of the utility model;

[0023] Figure 4It is a schematic diagram of the structure of the infrared receiving device with a shielding shell in a second unfolded state provided by an embodiment of the utility model;

[0024] Figure 5 It is a partial perspective structural diagram of an infrared receiving device with a shielding shell provided by an embodiment of the utility model.

[0025] In the accompanying drawings, 1. metal lead frame; 11. mounting portion; 12. shielding portion; 121. connecting portion; 122. front panel; 123. side panel; 13. window; 2. photosensitive element; 3. signal processing unit; 4. connecting wire; 5. pin; 6. packaging protection layer; 7. shielding shell; 8. focusing portion. DETAILED DESCRIPTION

[0026] The following is a clear and complete description of the technical solution of the utility model patent in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] Example 1

[0030] See also Figure 1 to Figure 4 ,in Figure 1 It is a schematic diagram of the structure of an infrared receiving device with a shielding shell. Figure 2 This is a schematic diagram of the partial explosion structure of an infrared receiving device with a shielding shell. Figure 3-42 is a schematic diagram of the structure of two unfolded states of an infrared receiving device with a shielding shell. The infrared receiving device with a shielding shell provided in this embodiment includes:

[0031] A metal lead frame 1, the metal lead frame 1 comprising a mounting portion 11 and a shielding portion 12, the mounting portion 11 being provided with a photosensitive element 2 and a signal processing unit 3, the photosensitive element 2 being used to receive an optical signal, the signal processing unit 3 being electrically connected to the photosensitive element 2 via a connecting wire 4, and the signal processing unit 3 being electrically connected to three pins 5 on one side of the mounting portion 11 via the connecting wire 4;

[0032] The encapsulation protection layer 6 is arranged on the metal lead frame 1, and is used to cover, encapsulate and protect the photosensitive element 2 and the signal processing unit 3; the shielding part 12 of the metal lead frame 1 can form a shielding shell 7 that covers the outside of the encapsulation protection layer 6, and the encapsulation protection layer 6 is also used to isolate the shielding part 12 from the photosensitive element 2, the signal processing unit 3, and the connecting line 4 to prevent the shielding part 12 from touching the photosensitive element 2, the signal processing unit 3, the connecting line 4, etc., causing a short circuit.

[0033] It is understandable that the photosensitive element 2 and the signal processing unit 3 can be selected from conventional types. For example, the photosensitive element 2 can be a photosensitive chip, and the signal processing unit 3 can be a decoding IC. More electronic components of the same type used in conventional infrared receiving devices are not listed here one by one. Those skilled in the art can choose to use them according to actual needs.

[0034] It can be understood that the main function of the metal lead frame 1 is to install and fix the photosensitive element 2 and the signal processing unit 3, and to serve as a shielding shell 7 to shield and protect these units to avoid signal interference and electromagnetic interference. The photosensitive element 2 and the signal processing unit 3 can be fixed on the metal lead frame 1 respectively with conductive silver paste.

[0035] It is understandable that the encapsulation protection layer 6 is mainly encapsulation glue, such as plastic encapsulation epoxy resin, etc., which will not be further described here.

[0036] It can be understood that the three pins 5 are the ground pin, the signal output pin and the power pin, which belong to the basic structure of the infrared receiving device and will not be further described here. At the same time, when the encapsulation protection layer 6 encapsulates the components on the metal lead frame 1, it can encapsulate and fix the pins 5 and the signal processing unit 3, not only encapsulating and fixing the connecting wire 4, but also forming a certain overall fixing effect, so that the encapsulation protection layer 6 formed after the potting glue is cured can make the connection between the pin 5 and the shielding shell 7 more secure, and can effectively avoid the situation where the pin 5 is loose and the connecting wire 4 is broken, which in turn causes the infrared receiving head to fail. Among them, the connecting wire 4 is mainly a conductive metal wire, such as gold wire, silver wire, copper wire and other bonding wires, which will not be further described here.

[0037] In the embodiment of the utility model, the encapsulation protection layer 6 is provided with a raised light-collecting portion 8. Since commonly used encapsulation glues such as epoxy resin can be transparent, the raised light-collecting portion 8 is provided on the encapsulation protection layer 6 to effectively collect light and improve the signal receiving effect. It can be understood that the light-collecting portion 8 and the encapsulation protection layer 6 are integrated.

[0038] In the embodiment of the utility model, a window 13 is provided on the shielding part 12 of the metal lead frame 1, and the window 13 is aligned with the light focusing part 8. The window 13 is convenient for receiving optical signals. In the embodiment of the utility model, the window 13 is one of circular, square, elliptical, mesh-shaped or a combination of multiple shapes.

[0039] In order to reduce the thickness of the infrared receiving device, while ensuring the focusing effect, it is preferred that the protruding height of the focusing portion 8 does not exceed the outer side of the window 13, and can be slightly raised. In other embodiments, in order to make the product thinner, the focusing portion 8 may not even be provided. More specific embodiments are not further described here. Of course, the height of the focusing portion 8 may not be strictly limited according to actual needs, which is not further described here.

[0040] like Figure 1 to Figure 4 In the embodiment of the utility model, the shielding part 12 is composed of a connecting part 121, a front panel 122 and a side panel 123. The connecting part 121 can be bent and arranged at the end of the mounting part 11 to connect the mounting part 11 and the front panel 122. The side panel 123 is arranged on the side of the front panel 122. The connecting part 121 is illustrated as a two-strip structure in this embodiment to reduce the overall weight. In other embodiments, it can also be simply deformed, such as directly using a plate shape. More implementation methods are not further described here.

[0041] In the embodiment of the utility model, a bending mark is provided between the side panel 123 and the front panel 122 , and the side panel 123 can be bent and provided on the side of the front panel 122 .

[0042] It is understood that the metal lead frame 1 may be Figure 3 As shown in the figure, the shielding shell 7 is in a completely flattened out posture, so that a bending mark is provided between the side panel 123 and the front surface so as to facilitate folding when the shielding shell 7 is subsequently bent.

[0043] In other embodiments of the present invention, the side panels 123 and the front panel 122 are bent and arranged on the side of the front panel 122, and a fixed angle is formed between the side panels 123 and the front panel 122. Specifically, Figure 3 The figure is a kind of fully flattened posture, and a bending mark is set between the side panel 123 and the front panel 122, and the two are basically flat before forming the shielding shell 7. In other embodiments, in order to further reduce the packaging process, the side panel 123 and the front panel 122 can be folded in advance to form the basic part of the shielding shell 7, for example, the side panel and the front panel are bent at 90 degrees in advance, and after the packaging protective layer 6 is packaged, the front panel 122 is bent and the front panel 122 and the side panel 123 are simultaneously attached to the packaging protective layer 6. More details are not further described here.

[0044] In the embodiment of the present utility model, the side panel 123 includes at least two sides. Figure 1 The side panels 123 shown in the figure mainly include the two sides of the front panel 122, but in other embodiments, they can also be arranged on both sides of the front panel 122. Figure 1 A side panel 123 is provided on the side of the front end of the center panel 122, so that the shielding shell 7 has a larger range. More possible simple expansions will not be further described here.

[0045] like Figure 5 As shown, it is a partial perspective structural diagram of the infrared receiving device with a shielding shell in this embodiment. Considering that the metal lead frame 1 cannot contact the connecting wire 4 between the photosensitive element 2 and the signal processing unit 3 and the connecting wire 4 between the signal processing unit 3 and the pin 5, otherwise a short circuit will be caused. Therefore, in this embodiment, the photosensitive element 2, the signal processing unit 3, and the connecting wire 4 are all encapsulated inside, and then the metal lead frame 1 is bent and deformed to form a metal shielding shell 7, which can effectively avoid the short circuit caused by the contact between the metal lead frame 1 and the connecting wire 4.

[0046] It can be understood that the specific packaging process of the infrared receiving device with a shielding shell of the utility model includes: fixing the photosensitive element 2 and the signal processing unit 3 on the metal lead frame 1 respectively with conductive silver paste, electrically connecting the photosensitive element 2 and the signal processing unit 3 with conductive connecting wires 4 such as bonding wires, and connecting the functional area of ​​the signal processing unit 3 with the three corresponding pins 5 on one side of the metal lead frame 1 through the connecting wires 4, forming a packaging protection layer 6 on the component area using a packaging material such as epoxy resin by molding, the packaging protection layer 6 can transmit infrared light, and the formed packaging protection layer 6 also has a focusing portion 8 for focusing light, which is integrally formed with other parts. If the product is to be thinner, the focusing portion 8 may not be required; then the shielding portion 12 of the metal lead frame 1 is bent and covered on the packaging protection layer 6 colloid to form a shielding shell 7 as a whole.

[0047] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0048] The infrared receiving device with a shielding shell provided by the utility model uses the metal lead frame 1 as a part of the shielding shell 7, and the shielding shell 7 is directly connected to the pin 5 of the product, so that the product does not need to be manually installed with the shielding shell 7 and welded, the thickness is reduced, the overall volume is greatly reduced, the space arrangement is more reasonable, and automated production can be realized.

[0049] Example 2

[0050] The utility model also provides an infrared receiving device, which is provided with at least one infrared receiving device with a shielding shell as described in any one of the items.

[0051] It is understandable that the infrared receiving device can be household appliances, audio equipment, medical instruments, lighting, automobiles, drones, military, etc., which will not be further described here.

[0052] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. An infrared receiving device with a shielding shell, characterized in that: include: A metal lead frame, the metal lead frame comprising a mounting portion and a shielding portion, the mounting portion being provided with a photosensitive element and a signal processing unit, the photosensitive element being used to receive an optical signal, the signal processing unit being electrically connected to the photosensitive element via a connecting wire, and the signal processing unit being electrically connected to three pins on one side of the mounting portion via the connecting wires; The packaging protective layer is arranged on the metal lead frame, and is used to cover, package and protect the photosensitive element and the signal processing unit; the shielding part of the metal lead frame can form a shielding shell covering the outside of the packaging protective layer, and the packaging protective layer is also used to isolate the shielding part from the photosensitive element, the signal processing unit and the connecting wire.

2. The infrared receiving device with a shielding shell according to claim 1, characterized in that: The packaging protection layer is provided with a raised light focusing portion.

3. The infrared receiving device with a shielding shell according to claim 2, characterized in that: A window is provided on the shielding portion of the metal lead frame, and the window is aligned with the light focusing portion.

4. The infrared receiving device with a shielding shell according to claim 3, characterized in that: The window is in the shape of a circle, a square, an ellipse, a mesh or a combination of multiple shapes.

5. The infrared receiving device with a shielding shell according to claim 3, characterized in that: The protrusion height of the light-collecting portion does not exceed the outer side of the window.

6. The infrared receiving device with a shielding shell according to claim 1, characterized in that: The shielding part is composed of a connecting part, a front panel and a side panel. The connecting part can be bent and arranged at the end of the mounting part to connect the mounting part and the front panel. The side panel is arranged on the side of the front panel.

7. The infrared receiving device with a shielding shell according to claim 6, characterized in that: A bending mark is arranged between the side panel and the front panel, and the side panel can be bent and arranged on the side of the front panel.

8. The infrared receiving device with a shielding shell according to claim 6, characterized in that: The side panels are bent between the front panels and arranged on the side faces of the front panels, and a fixed angle is formed between the side panels and the front panels.

9. The infrared receiving device with a shielding shell according to claim 6, characterized in that: The side panel includes at least two sides.

10. An infrared receiving device, characterized in that: The device is provided with at least one infrared receiving device with a shielding shell as claimed in any one of claims 1 to 9.

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