Hook type metal shell and dust sensor thereof

Abstract

The utility model relates to a hook type metal shell and a dust sensor thereof. The hook type metal shell comprises a central flat plate, a connecting inclined plate and a buckling frame ring which are sequentially connected from the center to the outside. A buckling plate extending downwards is arranged on the side surface of the buckling frame ring; a horizontal buckle hole is formed in the buckle plate; the hook type metal shell extends inwards to form a plate spring; according to the utility model, the buckle hole is used for locking, the conventional screw can be replaced for locking, but the material cost is low, the assembly is simpler, and the assembly efficiency is high; the plate spring is simple in structure and low in manufacturing cost. Comprising the metal shell is reduced in assembly action, high in assembly efficiency and low in material cost.

Description

Technical Field

[0001] The utility model relates to the technical field of dust sensors, in particular to a hook-type metal shell and its dust sensor. Background Technique

[0002] In the field of dust sensors, a metal shell is used as a container to wrap the circuit board, light-emitting element, and light-receiving element of the dust sensor to avoid interference from external electromagnetic noise to the circuit board, light-emitting element, and light-receiving element. For example, the patented dust sensor with the authorization announcement number CN104949905B provides a hook-type metal shell 12 for electromagnetic shielding. The hook-type metal shell 12 is connected to the circuit board using screws. During the assembly process of the dust sensor, when connecting the hook-type metal shell 12 to the detection base 11, the screws need to be aligned with the corresponding positions, and an electric screwdriver or an ordinary screwdriver is also required to screw the screws into this position. There are many assembly operations, the operation is troublesome, and the types of tools and materials used are also many, taking up a relatively long time. Therefore, the assembly efficiency is low; moreover, the equipped screws also account for a part of the material cost; how to reduce the assembly cost in this assembly process is a technical problem that the prior art needs to solve. This assembly cost includes time cost and material cost. Content of the Utility Model

[0003] The purpose of the utility model is to solve the above problems and provide a hook-type metal shell and its dust sensor.

[0004] The technical solution of the utility model is: a hook-type metal shell includes a central flat plate, a connecting inclined plate, and a buckling frame ring that are sequentially connected from the center outwards; a buckling plate extends downward from the side of the buckling frame ring; a horizontal buckling hole is provided on the buckling plate; the hook-type metal shell is locked through the buckling hole, which can replace the previous screws for locking, but has a low material cost, is simpler to assemble, and has a high assembly efficiency; a leaf spring extends inwards from the hook-type metal shell; the leaf spring has a simple structure and a low manufacturing cost for the hook-type metal shell.

[0005] Preferably, the hook-type metal shell is formed by stamping, which can reduce the manufacturing cost.

[0006] Preferably, there are two buckling plates, which are respectively arranged on both sides of the buckling frame ring, which can improve the connection stability of the hook-type metal shell, reduce the usage amount of screws at the same time, reduce the operation actions, save the operation time, and also save the material cost.

[0007] Preferably, the top of the buckling plate is connected to the middle of the connecting inclined plate; a notch B corresponding to the buckling plate is provided on the edge of the hook-type metal shell; in this way, the hook-type metal shells can be stacked on top of each other, which is convenient for storage and indirectly improves the efficiency of assembling the hook-type metal shell.

[0008] A dust sensor including the above hook-type metal shell further includes a detection base and a circuit board; the side of the detection base is provided with a buckle tooth that cooperates with the buckle hole; the buckle tooth cooperates with the buckle hole to lock the metal shell and the detection base, with a simple structure, convenient operation, and reduced material and assembly costs.

[0009] The hook-type metal shell is provided with notch A; the detection base is provided with a circuit board; a connector is provided on the circuit board; the notch A is matched and corresponding to the connector, so that the connector is exposed outside, facilitating the docking of the power supply line and the electrical signal transmission line.

[0010] A GND electrode is provided on the circuit board; the bottom of the leaf spring abuts against the GND electrode, making the shielding effect of the metal shell against external interfering electromagnetic fields more stable.

[0011] Preferably, the dust sensor further includes a support plate, a light-emitting element, a reflective element, and a light-receiving element; several vertical support plates are provided inside the detection base to support the support plate; the support plate supports the circuit board; the hook-type metal shell is provided with a dust inlet; the detection base is provided with a dust outlet corresponding to the dust inlet; the circuit board is provided with a dust passage hole A; the support plate is provided with a dust passage hole B; the dust passage hole A, the dust passage hole B, and the dust outlet are all matched in size with the dust inlet and are concentrically connected; a dust chamber is provided between the dust passage hole B and the dust outlet; the light-emitting element and the light-receiving element are installed at the bottom of the circuit board and penetrate through the support plate; the reflective elements are respectively arranged below the light-emitting element and below the light-receiving element; the light-emitting element emits monochromatic parallel light, which is reflected by the reflective element below the light-emitting element and leads to the dust chamber, and is reflected in the dust chamber to the reflective element below the light-receiving element and then emitted upward to the light-receiving element; the light-emitting element emits monochromatic parallel light, which is guided to the dust chamber by the reflective element below it; the monochromatic parallel light will attenuate in light intensity when it encounters dust in the dust chamber; the attenuated monochromatic parallel light is reflected by the reflective element below the light-receiving element to the light-receiving element; the light-receiving element converts the attenuated monochromatic parallel light into an electrical signal to measure the dust concentration in the dust chamber.

[0012] Further, the leaf spring is connected to the edge of notch A, so that the connection relationship between the leaf spring and the GND electrode is directly exposed outside. On the one hand, it is convenient for people to visually observe the connection situation between the leaf spring and the GND motor and make appropriate adjustments. On the other hand, it is also convenient to strengthen the connection stability between the leaf spring and the GND electrode.

[0013] Further, the edge of the leaf spring is welded to the GND electrode to strengthen the connection stability between the leaf spring and the GND electrode.

[0014] Furthermore, downward bending plates are provided along the edges of Notch A that is connected to the central flat plate. On the one hand, it can shield other parts of the circuit board except the connector, ensuring the shielding effect. On the other hand, it can strengthen the structural strength at Notch A and improve the compressive capacity of the hook-type metal shell. Notch A is a structurally weak area of the hook-type metal shell, and downward bending can reinforce this area.

[0015] Preferably, an outer step is provided at the top of the detection base; the bottom edge of the buckling frame ring is buckled on the outer step; in this way, the electromagnetic shielding effect of the hook-type metal shell on the top of the detection base is better.

[0016] Furthermore, the thickness of the outer step is equivalent to that of the bottom edge of the buckling frame ring, which is convenient for the side surface of the hook-type metal shell to be aligned with the side surface of the detection base for buckling, forming an integral body and being convenient for holding by hand.

[0017] Furthermore, a vertical groove matching the buckling plate is provided on the side surface of the detection base; the buckling plate is inserted into the vertical groove to minimize the external protrusion of the dust sensor after assembly and make it easy to hold.

[0018] Preferably, a dust guide pipe passing through Dust Passage A coaxially with Dust Passage B is provided, which is used to guide the dust entering from the dust inlet to the dust cavity for dust concentration detection.

[0019] The beneficial effects of the present utility model are as follows: The hook-type metal shell of the present utility model has the following advantages:

[0020] (1) The present utility model is locked through the buckle holes, which can replace the conventional screws for locking, but has a low material cost, is simpler to assemble, and has a high assembly efficiency; the leaf spring has a simple structure and a low manufacturing cost;

[0021] (2) The present utility model has two buckling plates, which are respectively arranged on both sides of the buckling frame ring, can improve the connection stability between the hook-type metal shell and the detection base, reduce the usage amount of screws at the same time, reduce the operation actions, save the operation time, and also save the material cost.

[0022] The assembly actions of its dust sensor are reduced, the assembly efficiency is high, and the material cost is low. Description of the Drawings

[0023] Figure 1 is the three-dimensional view of the hook-type metal shell of the present utility model in Embodiment 1 Figure 1 ;

[0024] Figure 2 is the three-dimensional view of the hook-type metal shell of the present utility model in Embodiment 1 Figure 2 ;

[0025] Figure 3 is the three-dimensional view of the hook-type metal shell of the present utility model in Embodiment 2 Figure 1 ;

[0026] Figure 4 is the three-dimensional view of the hook-type metal shell of the present utility model in the second embodiment Figure 2 ;

[0027] Figure 5 is the three-dimensional view of the dust sensor of the present utility model in the third embodiment;

[0028] Figure 6 is the three-dimensional view of the dust sensor of the present utility model in the fourth embodiment Figure 1 ;

[0029] Figure 7 is the three-dimensional view of the dust sensor of the present utility model in the fourth embodiment Figure 2 ;

[0030] Figure 8 is Figure 7 the partial side sectional view of;

[0031] Figure 9 is Figure 7 the sectional three-dimensional view of;

[0032] In the figure: 11. central flat plate, 12. connecting inclined plate, 13. buckling frame ring, 14. buckling plate, 141. buckling hole, 15. notch A, 151. bending plate, 16. leaf spring, 17. dust inlet, 18. notch B, 2. circuit board, 21. GND electrode, 22. dust passing hole A, 23. external connector, 3. support plate, 31. dust guide pipe, 4. light emitting element, 5. reflecting element, 6. light receiving element, 7. detection base, 71. buckling tooth, 72. outer step, 73. vertical groove, 74. support plate, 75. dust outlet, 76. dust cavity. Specific embodiments

[0033] Embodiment 1: Refer to Figure 1-2 , a hook-type metal shell includes a central flat plate 11, a connecting inclined plate 12, and a buckling frame ring 13 that are connected in sequence from the center to the outside; a buckling plate 14 extends downward from the side of the buckling frame ring 13; a horizontal buckling hole 141 is provided on the buckling plate 14; the hook-type metal shell is locked through the buckling hole 141, which can replace the conventional screws for locking, but has a low material cost, is simpler to assemble, and has a high assembly efficiency; a leaf spring 16 extends inward from the hook-type metal shell; the leaf spring 16 has a simple structure and a low manufacturing cost.

[0034] Compared with the prior art, the present utility model is locked through the buckling hole 141, which can replace the conventional screws for locking, but has a low material cost, is simpler to assemble, and has a high assembly efficiency; the leaf spring 16 of the present utility model has a simple structure and a low manufacturing cost.

[0035] In this embodiment, the buckle plate 14 is only provided on one side of the hook-type metal shell; on the other side of the hook-type metal shell, screw connection points are still provided.

[0036] The hook-type metal shell is formed by stamping, which can reduce the manufacturing cost. The working principle of this embodiment: The hook-type metal shell is locked through the buckle hole 141, which can replace the previous screw connection relationship, but has a low material cost, is easier to assemble, and has a high assembly efficiency. The leaf spring 16 has a simple structure and a low manufacturing cost; the hook-type metal shell is formed by stamping, which can reduce the manufacturing cost.

[0037] Embodiment Two: Refer to Figure 3-4 , Embodiment Two is basically the same as Embodiment One, and the same parts will not be described again. The differences are: There are two buckle plates 14, which are respectively arranged on both sides of the buckling frame ring 13, which can improve the connection stability of the hook-type metal shell, reduce the amount of screws used at the same time, reduce the operation actions, save the operation time, and also save the material cost.

[0038] The top of the buckle plate 14 is connected to the middle of the connecting inclined plate 12; a notch B 18 corresponding to the buckle plate 14 is provided at the edge of the hook-type metal shell; in this way, the hook-type metal shells can be stacked on top of each other, which is convenient for storage and indirectly improves the efficiency when assembling the hook-type metal shells.

[0039] In this embodiment, the buckle plates 14 are arranged on both sides of the dust sensor; the central plane of the hook-type metal shell is more complete.

[0040] Embodiment Three: Refer to Figure 5 , A dust sensor including the hook-type metal shell described in Embodiment One further includes a detection base 7 and a circuit board 2; a buckle tooth 71 matching with the buckle hole 141 is provided on the side of the detection base 7; the buckle tooth 71 cooperates with the buckle hole 141 to lock the metal shell and the detection base 7, which has a simple structure, is convenient to operate, and both the material cost and the assembly cost are reduced.

[0041] The hook-type metal shell is provided with a notch A 15; a circuit board 2 is provided inside the detection base 7; a connector is provided on the circuit board 2; the notch A 15 is matched with the connector, so that the connector is exposed outside, which is convenient for the docking of the power supply line and the electrical signal transmission line.

[0042] A GND electrode 21 is provided on the circuit board 2; the bottom of the leaf spring 16 abuts against the GND electrode 21, making the shielding effect of the metal shell against external interfering electromagnetic fields more stable.

[0043] The leaf spring 16 is connected to the edge of the notch A 15, so that the connection relationship between the leaf spring 16 and the GND electrode 21 is directly exposed outside. On the one hand, it is convenient for people to directly observe the connection situation between the leaf spring 16 and the GND motor and make appropriate adjustments. On the other hand, it is also convenient to strengthen the connection stability between the leaf spring 16 and the GND electrode 21.

[0044] There are various methods to strengthen the connection stability between the reinforcing leaf spring 16 and the GND electrode 21. For example, the leaf spring 16 can be connected to the circuit board 2 using screws, or the leaf spring 16 can be connected to the circuit board 2 using electric welding. In this embodiment, the edge of the leaf spring 16 is welded to the GND electrode 21 to strengthen the connection stability between the leaf spring 16 and the GND electrode 21.

[0045] Downward bending plates 151 are provided along the edges of the notch A 15 connected to the central flat plate 11. On the one hand, it can shield other parts of the circuit board 2 except the connector, ensuring the shielding effect. On the other hand, it can strengthen the structural strength at the notch A 15 and improve the compressive resistance of the hook-type metal shell. The notch A 15 is a structurally weak area of the hook-type metal shell, and downward bending can reinforce the area of the notch A 15.

[0046] The dust sensor further includes a support plate 3, a light-emitting element 4, a reflective element 5, and a light-receiving element 6. Inside the detection base 7, there are several vertical support plates 74 to support the support plate 3. The support plate 3 supports the circuit board 2. The hook-type metal shell is provided with a dust inlet 17. The detection base 7 is provided with a dust outlet 75 corresponding to the dust inlet 17. The circuit board 2 is provided with a dust passage hole A 22. The support plate 3 is provided with a dust passage hole B. The dust passage hole A 22, the dust passage hole B, and the dust outlet 75 are all of the same size and are concentrically connected. A dust chamber 76 is provided between the dust passage hole B and the dust outlet 75. The light-emitting element 4 and the light-receiving element 6 are installed at the bottom of the circuit board 2 and penetrate through the support plate 3. The reflective element 5 is respectively arranged below the light-emitting element 4 and below the light-receiving element 6. The monochromatic parallel light emitted by the light-emitting element 4 is reflected by the reflective element 5 below the light-emitting element 4 and leads to the dust chamber 76, and is reflected in the dust chamber 76 to the reflective element 5 below the light-receiving element 6 and then emitted upward to the light-receiving element 6. The light-emitting element 4 emits monochromatic parallel light, which is guided to the dust chamber 76 by the reflective element 5 below it. When the monochromatic parallel light encounters dust in the dust chamber 76, the light intensity will attenuate. The attenuated monochromatic parallel light is reflected by the reflective element 5 below the light-receiving element 6 to the light-receiving element 6. The light-receiving element 6 converts the attenuated monochromatic parallel light into an electrical signal to measure the dust concentration in the dust chamber 76.

[0047] The top of the detection base 7 is provided with an outer step 72. The bottom edge of the buckling frame ring 13 is buckled on the outer step 72. In this way, the electromagnetic shielding effect of the hook-type metal shell on the top of the detection base 7 is better.

[0048] The outer step 72 and the bottom edge of the buckling frame ring 13 have the same thickness, which is convenient for the side of the hook-type metal shell to be aligned with the side of the detection base 7 during buckling to form an integral body and is convenient for holding by hand.

[0049] The side of the detection base 7 is provided with a vertical groove 73 that matches the buckle plate 14; the buckle plate 14 is inserted into the vertical groove 73 to minimize the external protrusion of the dust sensor after assembly and make it easy to hold.

[0050] The dust guide tube 31 that passes through the dust inlet A coaxially is provided with a dust guide tube 31 that passes through the dust inlet A, and is used to guide the dust entering from the dust inlet 17 into the dust chamber 76.

[0051] Embodiment 4: Refer to Figure 6-9 , Embodiment 4 is basically the same as Embodiment 3, and the same parts will not be described again. The difference is that the hook-type metal shell included in this dust sensor is the hook-type metal shell described in Embodiment 2.

Claims

1. A hook-type metal shell, characterized in that: It includes a central flat plate, a connecting inclined plate, and a buckle frame ring which are connected in sequence from the center to the outside; a buckle plate extending downward is arranged on the side of the buckle frame ring; a horizontal buckle hole is arranged on the buckle plate; and a leaf spring extends inward from the hook-type metal shell.

2. The hook-type metal shell according to claim 1, characterized in that: The hook-type metal shell is formed by stamping.

3. The hook-type metal shell according to claim 1 or 2, characterized in that: There are two buckle plates, which are respectively arranged on both sides of the buckle frame ring.

4. The hook-type metal shell according to claim 3, characterized in that: The top of the gusset plate is connected to the middle of the connecting inclined plate; and a notch B corresponding to the gusset plate is arranged at the edge of the hook-type metal shell.

5. A dust sensor comprising the hook-type metal shell according to claim 2 or 4, characterized in that: It also includes a detection base and a circuit board; the side of the detection base is provided with buckle teeth that match the buckle holes; The hook-type metal shell is provided with a notch A; a circuit board is provided in the detection base; a connector is provided on the circuit board; the notch A matches and corresponds to the connector; A GND electrode is arranged on the circuit board; the bottom of the leaf spring abuts against the GND electrode.

6. The dust sensor according to claim 5, characterized in that: It also includes a support plate, a light-emitting element, a reflective element, and a light-receiving element; a plurality of vertical support plates are arranged inside the detection base to support the support plate; the support plate supports the circuit board; a hook-type metal shell is provided with a dust inlet; the detection base is provided with a dust outlet corresponding to the dust inlet; the circuit board is provided with a dust hole A; the support plate is provided with a dust hole B; the dust hole A, the dust hole B, and the dust outlet are all matched in size with the dust inlet and are concentrically connected; a dust cavity is provided between the dust hole B and the dust outlet; the light-emitting element and the light-receiving element are installed at the bottom of the circuit board and pass through the support plate; the reflective element is respectively arranged below the light-emitting element and below the light-receiving element; the light-emitting element emits monochromatic parallel light, which is reflected by the reflective element below the light-emitting element to the dust cavity, and is reflected in the dust cavity to the reflective element below the light-receiving element and emitted upward to the light-receiving element.

7. The dust sensor according to claim 5, characterized in that: The leaf spring is connected to the edge of the notch.

8. The dust sensor according to claim 5, characterized in that: The edges of the notch plates connected to the center plate are all provided with downward bending plates.

9. The dust sensor according to claim 5, characterized in that: An outer step is arranged on the top of the detection base; the bottom edge of the buckled frame ring is buckled on the outer step.

10. The dust sensor according to claim 5, characterized in that: Dust pass B is coaxially provided with a dust guide pipe passing through dust pass A.

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