A housing for stable mounting of circuit boards

Abstract

This utility model relates to a housing for stably mounting circuit boards. The housing includes a top shell and a bottom shell. The inner part of the housing is divided into a circuit board space and an optical path space. A partition wall is provided between the circuit board space and the optical path space. Within the circuit board space, an upper support column extends downward from the top shell, and a lower support column extends upward from the bottom shell corresponding to the upper support column. Within the circuit board space, an upper limit plate A extends downward from the top shell at a position corresponding to the light-emitting element, and an upper limit plate B extends downward from the top shell at a position corresponding to the light-receiving element. A lower limit plate A extends upward from the bottom shell at a position corresponding to the light-emitting element, and a lower limit plate B extends upward from the bottom shell at a position corresponding to the light-receiving element. The upper limit plate A has a mounting slot A; the upper limit plate B has a mounting slot B. The upper limit plate A and the lower limit plate A cooperate to vertically limit the light-emitting element; the upper limit plate B and the lower limit plate B cooperate to vertically limit the light-receiving element; the mounting slot A horizontally limits the light-emitting element; the mounting slot B horizontally limits the light-receiving element; thus, the installation of the circuit board is more stable.

Description

Technical Field

[0001] This utility model relates to the technical field of dust sensors, and in particular to a housing for stably mounting a circuit board. Background Technology

[0002] Dust sensors manufactured using optical principles are the most common type of dust sensor. The two core components of this dust sensor are the light-emitting element and the light-receiving element. The dust sensor also includes a matching circuit board and housing; the light-emitting element and the light-receiving element are mounted on the circuit board; existing housings, such as the top cover and base of an infrared dust sensor as described in patent CN204903340U, show this. The base 1 is fixedly connected to the top cover 9 by screws; the PCB board is connected to the bottom of the top cover 9 by screws; therefore, the screw mounting points completely avoid the light-emitting element and the light-receiving element; the light-emitting element and the light-receiving element are only horizontally limited by the lens housing A and the lens housing B; this type of circuit board mounting lacks limitation on the light-emitting element and the light-receiving element, which is detrimental to maintaining the stability of the optical path. Utility Model Content

[0003] The purpose of this invention is to solve the above-mentioned problems and provide a housing for stably mounting circuit boards.

[0004] The technical solution of this utility model is as follows: A box for stably mounting a circuit board includes a top shell and a bottom shell that are snapped together; the inner part of the box is divided into a circuit board space and an optical path space; a partition wall is provided between the circuit board space and the optical path space; within the circuit board space, an upper support column extends downward from the top shell, and a lower support column extends upward from the bottom shell corresponding to the upper support column; the upper and lower support columns cooperate with each other to achieve basic clamping of the circuit board; within the circuit board space, an upper limit plate A extends downward from the top shell at a position corresponding to the light-emitting element, and an upper limit plate B extends downward at a position corresponding to the light-receiving element; the upper limit plate A and the upper limit plate B... Plate B limits the upward vertical movement of both the light-emitting element and the light-receiving element. The bottom shell also extends a lower limit plate A at the position corresponding to the light-emitting element and a lower limit plate B at the position corresponding to the light-receiving element. Lower limit plates A and B limit the downward vertical movement of both the light-emitting and light-receiving elements. The lower end face of the upper limit plate A has a mounting groove A that matches the light-emitting element. The lower end face of the upper limit plate B has a mounting groove B that matches the light-receiving element. Mounting groove A limits the horizontal movement of the light-emitting element. Mounting groove B limits the horizontal movement of the light-receiving element. This makes the circuit board installation more stable.

[0005] Preferably, the lower end face of the upper support column, the lower end face of the upper limit plate A, and the lower end face of the upper limit plate B are on the same horizontal plane; the upper end face of the lower support column, the upper end face of the lower limit plate A, and the upper end face of the lower limit plate B are on the same horizontal plane; in this way, the upper surface of the circuit board is limited by the same horizontal plane, and the lower surface is also limited by the same horizontal plane, making the installation more stable.

[0006] Preferably, the partition wall includes an upper snap-fit ​​wall and a lower snap-fit ​​wall that are snapped together; the upper snap-fit ​​wall is integrally formed with the top shell; the lower snap-fit ​​wall is integrally formed with the bottom shell; this facilitates the assembly of the dust sensor; the upper limit plate B and the lower limit plate B are integrally formed with the upper snap-fit ​​wall and the lower snap-fit ​​wall respectively, improving the clamping stability of the circuit board at the location of the light-receiving element.

[0007] Furthermore, the partition wall is provided with a slot that matches the edge of the circuit board; the upper edge of the slot is set on the upper retaining wall; the lower edge of the slot is set on the lower retaining wall; the slot can clamp the edge of the circuit board, improving the installation stability of the circuit board.

[0008] Furthermore, the upper edge of the card slot is on the same horizontal plane as the lower end face of the upper support column; the lower edge of the card slot is on the same horizontal plane as the upper end face of the lower support column; thus, the circuit board achieves a better clamping effect.

[0009] Preferably, the inner edge of the top shell is provided with an inner convex ring; the outer edge of the bottom shell is provided with an outer convex ring; the outer convex ring and the inner convex ring cooperate with each other to improve the overall stability of the box; the lower end face of the upper support column is set beyond the lower end face of the top shell; the upper end face of the lower support column is set lower than the upper end face of the bottom shell; the circuit board is staggered from the upper and lower convex edges to improve the overall installation stability of the box.

[0010] Preferably, the upper and lower support columns are conical in shape to increase the connection area with the top and bottom shells and improve the structural stability of the upper and lower support columns.

[0011] Furthermore, the upper support column is integrally formed with the top shell sidewall, which improves the structural stability of the upper support column.

[0012] Furthermore, the upper snap wall is provided with a raised edge A; the lower snap wall is provided with a raised edge B; the raised edges A and B are staggered and interlock with each other to improve the overall stability of the box.

[0013] Furthermore, the bottom shell extends upwards to form positioning posts and limiting posts for positioning and limiting the circuit board; both positioning posts and limiting posts extend beyond the outer protruding ring; the upper end of the positioning post is provided with a tapered head; the tapered head can reduce the difficulty of installing the circuit board; the limiting post ensures the basic stability of the circuit board installation.

[0014] Preferably, the top surface of the top shell has a recessed hole coaxial with the upper support column; the lower support column has a threaded hole corresponding to the recessed hole; the housing for stabilizing the circuit board also includes mounting screws; the mounting screws pass through the recessed hole, and the circuit board and threaded hole are threaded together to achieve a fixed connection between the top shell and the bottom shell. Both the top shell and the bottom shell are made of conductive resin. The part of the circuit board through which the mounting screws pass serves as the grounding terminal of the circuit board, thereby shielding the circuit board, reducing the use of metal shielding components, reducing the cost of the dust sensor, and ensuring the quality of the dust sensor.

[0015] The beneficial effects of this utility model are as follows: The housing for stably mounting the circuit board of this utility model has the following advantages:

[0016] (1) The upper limit plate A and the lower limit plate A of this utility model cooperate to vertically limit the circuit board at the position of the light-emitting element; the upper limit plate B and the lower limit plate B cooperate to vertically limit the circuit board at the position of the light-receiving element; the mounting groove A limits the light-emitting element horizontally; the mounting groove B limits the light-receiving element horizontally; the installation of the circuit board is more stable.

[0017] (2) The lower end face of the upper support column, the lower end face of the upper limit plate A, and the lower end face of the upper limit plate B of this utility model are on the same horizontal plane; the upper end face of the lower support column, the upper end face of the lower limit plate A, and the upper end face of the lower limit plate B are on the same horizontal plane; in this way, the upper surface of the circuit board is limited by the same horizontal plane, and the lower surface is also limited by the same horizontal plane, making the installation more stable. Attached Figure Description

[0018] Figure 1 This is a top view of the housing for stably mounting the circuit board according to this utility model;

[0019] Figure 2 yes Figure 1 AA section view;

[0020] Figure 3 yes Figure 2 BB section view;

[0021] Figure 4 yes Figure 2 CC section view;

[0022] Figure 5 It is a three-dimensional view of the bottom shell;

[0023] Figure 6 This is a 3D view of the bottom case after the circuit board has been installed;

[0024] In the picture: Figure 2-4 The dashed line in the center represents the circuit board;

[0025] Figure 4 The double-dotted line in the diagram is similar to a contour line, mainly indicating that the planes connected by it are on the same horizontal plane.

[0026] 0. Circuit board, 1. Top shell, 11. Upper support post, 12. Upper limit wall A, 121. Mounting slot A, 13. Upper limit wall B, 131. Mounting slot B, 14. Inner convex ring, 15. Dust vent A, 16. Recessed hole, 2. Bottom shell, 21. Lower support post, 211. Threaded hole, 22. Lower limit wall A, 23. Lower limit wall B, 24. Outer convex ring, 25. Positioning post, 251. Conical head, 26. Limiting post, 27. Dust vent B, 3. Circuit board space, 4. Optical path space, 411. Upper sharp corner, 4111. Protruding edge C, 412. Lower sharp corner, 4121. Protruding edge D, 51. Upper retaining wall, 511. Protruding edge A, 52. Lower retaining wall, 521. Protruding edge B, 53. Slot, 6. Mounting screw. Detailed Implementation

[0027] Example 1: See Figure 1-6 A housing for stably mounting a circuit board includes a top shell 1 and a bottom shell 2 that are interlocked vertically. The interior of the housing is divided into a circuit board space 3 and an optical path space 4. A partition wall separates the circuit board space 3 and the optical path space 4. Within the circuit board space 3, an upper support column 11 extends downward from the top shell 1, and a lower support column 21 extends upward from the bottom shell 2 corresponding to the upper support column 11. The upper support column 11 and the lower support column 21 cooperate to achieve basic clamping of the circuit board 0. Within the circuit board space 3, an upper limit plate A extends downward from the top shell 1 at a position corresponding to the light-emitting element, and an upper limit plate B extends downward at a position corresponding to the light-receiving element. The upper limit plate A and the upper limit plate B... B limits the upward vertical movement of the light-emitting element and the light-receiving element respectively; the bottom shell 2 also extends a lower limit plate A upward at the position corresponding to the light-emitting element, and a lower limit plate B upward at the position corresponding to the light-receiving element; the lower limit plates A and B limit the downward vertical movement of the light-emitting element and the light-receiving element respectively; the lower end face of the upper limit plate A is provided with an insert groove A 121 that matches the light-emitting element; the lower end face of the upper limit plate B is provided with an insert groove B 131 that matches the light-receiving element; the insert groove A 121 limits the horizontal movement of the light-emitting element; the insert groove B 131 limits the horizontal movement of the light-receiving element; the installation of the circuit board 0 is more stable.

[0028] Compared with the prior art, this utility model adds an upper limit plate A, an upper limit plate B, a lower limit plate A, and a lower limit plate B; the upper limit plate A and the lower limit plate A cooperate to vertically limit the circuit board 0 at the position of the light-emitting element; the upper limit plate B and the lower limit plate B cooperate to vertically limit the circuit board 0 at the position of the light-receiving element; the mounting groove A 121 horizontally limits the light-emitting element; the mounting groove B 131 horizontally limits the light-receiving element; the installation of the circuit board 0 is more stable.

[0029] The lower end face of the upper support column 11, the lower end face of the upper limit plate A, and the lower end face of the upper limit plate B are on the same horizontal plane; the upper end face of the lower support column 21, the upper end face of the lower limit plate A, and the upper end face of the lower limit plate B are on the same horizontal plane; in this way, the upper surface of the circuit board 0 is limited by the same horizontal plane, and the lower surface is also limited by the same horizontal plane, making the installation more stable.

[0030] The partition wall includes an upper snap-fit ​​wall 51 and a lower snap-fit ​​wall 52 that are snapped together. The upper snap-fit ​​wall 51 is integrally formed with the top shell 1, and the lower snap-fit ​​wall 52 is integrally formed with the bottom shell 2. This facilitates the assembly of the dust sensor. The upper limit plate B and the lower limit plate B are integrally formed with the upper snap-fit ​​wall 51 and the lower snap-fit ​​wall 52, respectively, which improves the clamping stability of the circuit board 0 at the location of the light-receiving element.

[0031] The partition wall is provided with a slot 53 that matches the edge of the circuit board 0; the upper edge of the slot 53 is provided on the upper retaining wall 51; the lower edge of the slot 53 is provided on the lower retaining wall 52; the slot 53 can clamp the edge of the circuit board 0, thereby improving the installation stability of the circuit board 0.

[0032] The upper edge of the slot 53 is on the same horizontal plane as the lower end face of the upper support post 11; the lower edge of the slot 53 is on the same horizontal plane as the upper end face of the lower support post 21; thus, the circuit board 0 achieves a better clamping effect.

[0033] The inner edge of the top shell 1 is provided with an inner protruding ring 14; the outer edge of the bottom shell 2 is provided with an outer protruding ring 24; the outer protruding ring 24 and the inner protruding ring 14 cooperate with each other to improve the overall stability of the box; the lower end face of the upper support column 11 is set beyond the lower end face of the top shell 1; the upper end face of the lower support column 21 is set lower than the upper end face of the bottom shell 2; the circuit board 0 is staggered from the upper and lower protruding edges to improve the overall installation stability of the box.

[0034] The upper support column 11 and the lower support column 21 are conical in shape, which increases the connection area with the top shell 1 and the bottom shell 2 and improves the structural stability of the upper support column 11 and the lower support column 21.

[0035] The upper support column 11 is integrally formed with the side wall of the top shell 1, which improves the structural stability of the upper support column 11.

[0036] The upper snap wall 51 is provided with a raised edge A 511; the lower snap wall 52 is provided with a raised edge B 521; the raised edges A 511 and B 521 are staggered and interlocked with each other to improve the overall stability of the box.

[0037] The alignment of the raised edge A 511 with the outer raised ring 24 facilitates the demolding of the top shell 1; the alignment of the raised edge B 521 with the inner raised ring 14 facilitates the demolding of the bottom shell 2.

[0038] The working principle of this embodiment is as follows: The upper support column 11 and the lower support column 21 cooperate to achieve basic clamping of the circuit board 0; the upper limit plate A and the upper limit plate B respectively limit the upward vertical movement of the light-emitting element and the light-receiving element; the lower limit plate A and the lower limit plate B respectively limit the downward vertical movement of the light-emitting element and the light-receiving element; the mounting slot A 121 limits the horizontal movement of the light-emitting element; the mounting slot B 131 limits the horizontal movement of the light-receiving element; thus, the installation of the circuit board 0 is more stable. The lower end faces of the upper support column 11, the upper limit plate A, and the upper limit plate B are on the same horizontal plane; the upper end faces of the lower support column 21, the lower limit plate A, and the lower limit plate B are on the same horizontal plane; in this way, the upper surface and the lower surface of the circuit board 0 are limited by the same horizontal plane, making the installation more stable. The slot 53 can clamp the edge of the circuit board 0, improving the installation stability of the circuit board 0.

[0039] Example 2: Example 2 is basically the same as Example 1, and the similarities will not be repeated. The difference is that the bottom shell 2 extends upward to form a positioning post 25 and a limiting post 26 for positioning and limiting the circuit board 0. The positioning post 25 and the limiting post 26 both extend beyond the outer protruding ring 24. The upper end of the positioning post 25 is provided with a tapered head 251. The tapered head 251 can reduce the difficulty of installing the circuit board 0. The limiting post 26 ensures the basic stability of the circuit board 0 installation.

[0040] The top surface of the top shell 1 is provided with a dust vent 15; the bottom shell 2 is provided with a dust vent 27 corresponding to the dust vent 15; a dust channel is formed between the dust vent 15 and the dust vent 27. This dust channel is located within the optical path space 4.

[0041] The optical path space 4 has several light trapping sharp corners extending towards the dust channel along its edge; the area between adjacent light trapping sharp corners is a light trapping part, which can attenuate stray light; the light trapping sharp corners include an upper sharp corner 411 integral with the top shell 1 and a lower sharp corner 412 integral with the bottom shell 2; the lower end face of the upper sharp corner 411 has a protruding edge C 4111; the upper end face of the lower sharp corner 412 has a protruding edge D 4121 that engages with the protruding edge C 4111; the protruding edge C 4111 and the protruding edge D 4121 cooperate with each other to prevent the top shell 1 and the bottom shell 2 from being horizontally misaligned, and to ensure that the upper support column 11, the lower support column 21, the upper limit plate A, the upper limit plate B, the lower limit plate A, and the lower limit plate B act stably on the circuit board 0.

[0042] The outer end face of the protruding edge C4111 is on the same horizontal plane as the outer end face of the inner protruding ring 14; the outer end face of the protruding edge D4121 is on the same horizontal plane as the outer end face of the outer protruding ring 24. This facilitates demolding and manufacturing.

[0043] The top surface of the top shell 1 has a countersunk hole 16 coaxial with the upper support column 11; the lower support column 21 has a threaded hole 211 corresponding to the countersunk hole 16; the housing for stabilizing the circuit board also includes mounting screws 6; the mounting screws 6 pass through the countersunk hole 16, and the circuit board 0 is threaded into the threaded hole 211 to achieve a fixed connection between the top shell 1 and the bottom shell 2. Both the top shell 1 and the bottom shell 2 are made of conductive resin. The part of the circuit board 0 through which the mounting screws 6 pass serves as the grounding terminal of the circuit board 0, thereby shielding the circuit board 0, reducing the use of metal shielding parts, reducing the cost of the dust sensor, and ensuring the quality of the dust sensor.

Claims

1. A housing for stably mounting a circuit board, comprising a top shell and a bottom shell that are interlocked vertically; characterized in that, The box is divided into a circuit board space and an optical path space. A partition wall is provided between the circuit board space and the optical path space. In the circuit board space, the top shell extends downward to form an upper support column, and the bottom shell extends upward to form a lower support column corresponding to the upper support column. In the circuit board space, the top shell also extends downward to form an upper limit plate A at the position corresponding to the light-emitting element, and extends downward to form an upper limit plate B at the position corresponding to the light-receiving element. The bottom shell extends upward from the position corresponding to the light-emitting element to form a lower limit plate A, and extends upward from the position corresponding to the light-receiving element to form a lower limit plate B; the lower end face of the upper limit plate A is provided with an insert groove A corresponding to the light-emitting element; the lower end face of the upper limit plate B is provided with an insert groove B corresponding to the light-receiving element.

2. The housing for stably mounting the circuit board according to claim 1, characterized in that: The lower end face of the upper support column, the lower end face of the upper limit plate A, and the lower end face of the upper limit plate B are on the same horizontal plane; the upper end face of the lower support column, the upper end face of the lower limit plate A, and the upper end face of the lower limit plate B are on the same horizontal plane.

3. The housing for stably mounting the circuit board according to claim 1, characterized in that: The partition wall includes an upper snap-fit ​​wall and a lower snap-fit ​​wall that are interlocked vertically; the upper snap-fit ​​wall is integrally formed with the top shell; the lower snap-fit ​​wall is integrally formed with the bottom shell; Upper limit plate B and lower limit plate B are integrally formed with the upper snap wall and lower snap wall, respectively.

4. The housing for stably mounting the circuit board according to claim 3, characterized in that: The partition wall is provided with a slot that matches the edge of the circuit board; the upper edge of the slot is set on the upper retaining wall; the lower edge of the slot is set on the lower retaining wall.

5. The housing for stably mounting the circuit board according to claim 1, characterized in that: The top shell has an inner convex ring along its inner edge; the bottom shell has an outer convex ring along its outer edge; the outer convex ring and the inner convex ring cooperate with each other; the lower end face of the upper support column extends beyond the lower end face of the top shell; the upper end face of the lower support column is lower than the upper end face of the bottom shell.

6. The housing for stably mounting the circuit board according to claim 1, characterized in that: The upper and lower support columns are cone-shaped.

7. The housing for stably mounting the circuit board according to claim 6, characterized in that: The upper support column is integrally formed with the top shell sidewall.

8. The housing for stably mounting the circuit board according to claim 1 or 2, characterized in that: The upper wall has a raised edge A; the lower wall has a raised edge B; the raised edges A and B are staggered and interlocked with each other.

9. The housing for stably mounting the circuit board according to claim 5, characterized in that: The bottom shell also extends upwards to form a positioning post and a limiting post; both the positioning post and the limiting post extend beyond the outer convex ring; the upper end of the positioning post is provided with a tapered head.

10. The housing for stably mounting the circuit board according to claim 1, characterized in that: The top surface of the top shell has a recessed hole coaxial with the upper support column; the lower support column has a threaded hole that matches the recessed hole; the housing for the stable mounting circuit board also includes mounting screws; the mounting screws pass through the recessed hole, and the circuit board and the threaded hole are threadedly engaged; both the top shell and the bottom shell are made of conductive resin.

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