A power control small black box with a circuit board shielding metal frame structure

Abstract

The utility model discloses a power control small black box with circuit board shielding metal frame structure, including box body and circuit board ontology, and the circuit board ontology has the area to be shielded, and the area to be shielded area cover is equipped with shielding metal frame, and shielding metal frame is provided with two embedded feet, and the circuit board ontology is provided with two embedded holes, and two embedded feet lower end is provided with the sub -lock body, and the box body is built -in two female lock body, and two female lock body are located respectively in the two embedded holes below of circuit board ontology, the sub -lock body and female lock body constitute a locking mechanism jointly, when the sub -lock body inserts female lock body, and this locking mechanism is locked from the self -completion, when the shielding metal frame is pressed to the downward, can trigger this locking mechanism from the lockout switch to the unlocking, thereby realizes the release of shielding metal frame. The utility model has the advantages and effects as follows: through pressing, the quick unlocking and installation of shielding frame are realized, the quick dismounting and maintenance of exempting from the tool are realized, and the reliability of locking is guaranteed simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of circuit board technology, and in particular to a small black box for power control with a circuit board shielding metal frame structure. Background Technology

[0002] In the circuit board design of power control black boxes, shielding metal frames are commonly used for electromagnetic shielding and heat dissipation to ensure stable operation of the circuit board. In existing technologies, the shielding metal frames are mostly fixed using rigid connections such as screws or welding. While these methods result in robust structures, the disassembly process is cumbersome when frequent maintenance or replacement of circuit board components is required, necessitating specialized tools and easily causing component damage or improper installation, severely impacting maintenance efficiency and reliability. Therefore, how to achieve a tool-free, easy-to-operate, quick locking and unlocking mechanism for the shielding metal frame has become the core technical problem in this field. Utility Model Content

[0003] The purpose of this invention is to provide a small black box for power control with a circuit board shielded metal frame structure to solve the problems mentioned in the background art.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A small black box for power control with a circuit board shielding metal frame structure includes a box body containing a circuit board body. The circuit board body has a shielding area, and a shielding metal frame covers the shielding area. Embedded feet extend downwards on opposite sides of the shielding metal frame. Embedded holes for the two embedded feet are provided within the circuit board body. Sub-locking bodies extend downwards from the lower ends of the two embedded feet. Two female locking bodies are located within the box body, respectively below the two embedded holes in the circuit board body, allowing the two sub-locking bodies to extend into them. The sub-locking bodies and female locking bodies together form a locking mechanism. When a sub-locking body is inserted into a female locking body, the locking mechanism automatically locks. After locking, applying downward pressure to the shielding metal frame triggers the locking mechanism to switch from locked to unlocked, thereby releasing the shielding metal frame.

[0005] By adopting the above technical solution, and through the locking mechanism consisting of a shielding metal frame, embedded feet, embedded holes, and a sub-lock body and a main lock body, the rapid installation and locking of the shielding metal frame is achieved. During installation, simply insert the embedded feet into the embedded holes, and the sub-lock body automatically locks with the main lock body, eliminating the need for screws or other fasteners, greatly reducing assembly time and labor costs. Simultaneously, when maintenance or replacement of the circuit board body is required, simply applying downward pressure triggers unlocking, releasing the shielding metal frame; operation is simple and maintenance efficiency is improved. The shielding metal frame directly covers the area to be shielded on the circuit board body. The precise fit of the embedded feet and embedded holes ensures tight contact between the shielding metal frame and the circuit board, effectively reducing electromagnetic interference and radio frequency interference, and improving the circuit's anti-interference capability and signal integrity.

[0006] A further feature is that the sub-lock body, through its narrowed lower end design, forms guide slopes on both sides to facilitate insertion into the mother lock body; the upper end of the sub-lock body has a widened portion, and the hook step formed at the junction of the widened portion and the embedded foot is used to form a locking mechanism.

[0007] By adopting the above technical solution, the narrowing design at the lower end of the sub-lock body forms a guide slope, making it easier to align and insert when the sub-lock body is inserted, reducing resistance and the risk of misalignment during installation. The hook step formed by the widened part at the upper end of the sub-lock body and the insertion foot provides a clear locking point. When the sub-lock body is inserted into the sub-lock body, the hook step and the locking boss of the sub-lock body engage with each other, forming a firm mechanical connection and preventing the shielding metal frame from coming out under vibration or impact.

[0008] A further provision is that the main lock body includes a fixed housing fixed inside the box body, and the fixed housing has a locking cavity extending longitudinally. A sliding lock cylinder can move vertically in the locking cavity. An extension is connected to the upper part of the sliding lock cylinder, and a pair of opposing elastic claws are connected to the upper part of the extension. A locking area for accommodating the sub-lock body is formed between the two elastic claws. Locking protrusions are provided on the inner sides of the two elastic claws. The two locking protrusions can engage with the two hook steps to achieve locking.

[0009] By adopting the above technical solution, when the sub-lock body is inserted, the locking protrusion on the elastic claw automatically engages with the hook step of the sub-lock body, achieving instant locking without external intervention. This automatic locking mechanism improves the assembly speed. The relative arrangement of the elastic claws provides uniform clamping force, ensuring the balance and consistency of locking. The fixed housing is fixed inside the box, hiding the locking mechanism inside, avoiding external protrusion and saving space.

[0010] A further feature is that the two elastic claws have an outward expansion tendency in their natural state, keeping the locking area open when not constrained by external forces; both sides of the upper end of the fixed housing are provided with pressing surfaces. When the sliding lock cylinder moves downward relative to the fixed housing, the two elastic claws will undergo opposing elastic deformation due to the radial constraint of the pressing surfaces, thereby causing the locking protrusions on the inner sides of the two elastic claws to retract inward, achieving engagement and locking with the hook step.

[0011] By adopting the above technical solution, the elastic claw has an outward expansion elastic tendency in its natural state, keeping the locking area open and facilitating the quick insertion of the sub-lock body. This design reduces the preparation steps before installation. When the sliding lock cylinder moves down, the extrusion surface at the upper end of the fixed housing applies radial constraint to the elastic claw, causing the elastic claw to undergo opposite elastic deformation. The locking boss retracts inward, thereby tightly locking the hook step of the sub-lock body. This mechanism ensures the controllability of the locking force and improves the reliability of locking.

[0012] A further feature is that the front end of the fixed housing has a longitudinal limiting hole, and the sliding lock cylinder has a limiting block that extends into the limiting hole.

[0013] By adopting the above technical solution, the cooperation of the limiting hole and the limiting block restricts the longitudinal movement range of the sliding lock cylinder, preventing the sliding lock cylinder from coming out or getting stuck during operation, ensuring the stable operation of the locking mechanism, and maintaining flexibility even in frequent unlocking scenarios.

[0014] A further feature is that a spring is provided at the bottom of the locking cavity, the upper end of which abuts against the sliding lock cylinder and provides an upward preload to the sliding lock cylinder, giving the sliding lock cylinder a tendency to return to its original position, thereby keeping the locking area between the two elastic claws in an open state.

[0015] By adopting the above technical solution and the spring setting, it is ensured that the mechanism is immediately ready for the next locking after each unlocking, thus improving operational efficiency and continuity.

[0016] A further configuration includes a rotating shaft hinged to one end of the sliding lock cylinder, with a locking protrusion at the end of the rotating shaft. A locking element is fixedly installed within the locking cavity, consisting of an upper locking section and a lower locking section, forming a locking gap between them. An inlet ramp is provided at the upper end of the upper locking section. When the sliding lock cylinder moves downward relative to the fixed housing, the locking protrusion slides into the locking gap along the inlet ramp. A locking recess is provided at the lower end of the upper locking section, and a first outlet ramp is provided on one side of the locking recess. The two are connected by a transition surface. A second outlet ramp is provided at the upper end of the lower locking section. After the locking protrusion slides into the locking gap, it engages with the locking recess, thus locking. In the locked state, applying downward pressure to the shielding metal frame causes the locking protrusion to slide out of the locking recess along the transition surface and then slide out of the locking gap along the first and second outlet ramps, thereby unlocking.

[0017] By adopting the above technical solution, the locking protrusion slides into the locking interval along the guide slope and engages with the locking recess, ensuring the locking stability. When unlocking, simply apply downward pressure to the shielding metal frame, and the locking protrusion slides out of the locking recess along the transition surface and moves out of the locking interval along the first guide slope and the second guide slope. This unlocking method is simple and intuitive, and users do not need to learn complicated steps, thus improving the user experience.

[0018] A further feature is that the cross-sectional shape of the locking protrusion is circular.

[0019] By adopting the above technical solution, the circular cross-section makes the contact point between the locking protrusion and the locking component smoother during the sliding process, making the locking and unlocking operations easier and smoother.

[0020] In summary, this utility model has the following beneficial effects: the shielding frame can be quickly unlocked and installed by pressing, achieving tool-free quick disassembly and maintenance, while ensuring the reliability of the locking. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the circuit board body in the embodiment; Figure 2 This is a schematic diagram of the assembly of the shielding metal frame and the circuit board body in the embodiment; Figure 3 for Figure 2 Enlarged view of section A in the middle; Figure 4 This is a schematic diagram of a partial structure inside the fixed housing in the embodiment. Figure 1 ; Figure 5 This is a schematic diagram of a partial structure inside the fixed housing in the embodiment. Figure 2 .

[0022] Reference numerals: 11. Circuit board body; 12. Area to be shielded; 13. Embedded hole; 21. Shielding metal frame; 22. Embedded foot; 31. Sub-lock body; 311. Guide slope; 312. Hook step; 41. Fixed housing; 411. Extrusion surface; 42. Locking cavity; 43. Sliding lock cylinder; 44. Extension; 45. Elastic claw; 451. Locking boss; 46. Locking area; 51. Limiting hole; 52. Limiting block; 61. Spring; 71. Rotating shaft; 711. Locking protrusion; 81. Upper locking section; 811. Guide slope; 812. Locking recess; 813. First guide slope; 814. Transition surface; 82. Lower locking section; 821. Second guide slope; 91. Locking interval. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] As attached Figure 1-5 As shown; This embodiment discloses a small black box for power control with a circuit board shielding metal frame structure, including a box body, a circuit board body 11 inside the box body, a shielding area 12 on the circuit board body 11, a DC-DC module disposed on the circuit board body 11, and the shielding area 12 being the area containing the DC-DC module; a shielding metal frame 21 is provided on the shielding area 12, and embedded feet 22 are provided on both opposite sides of the shielding metal frame 21 extending downwards; the circuit board body 11 is provided with embedded holes 13 for the two embedded feet 22 to pass through. Each of the embedded feet 22 has a lowerly extending sub-lock body 31. The housing contains two female lock bodies, which are located below the two embedded holes 13 of the circuit board body 11, respectively, so that the two sub-lock bodies 31 can be inserted into them. The sub-lock bodies 31 and the female lock bodies together form a locking mechanism. When the sub-lock body 31 is inserted into the female lock body, the locking mechanism automatically locks itself. After the locking mechanism has locked, when a downward pressing force is applied to the shielding metal frame 21, the locking mechanism can be triggered to switch from locking to unlocking, thereby releasing the shielding metal frame 21. The black box in this embodiment uses a black shell and integrates a control module and a power module (this is prior art and therefore not described in detail). The heat dissipation shielding metal frame of the circuit board is part of its structure. The improvement of this application is mainly in the shielding metal frame. The size of the power control black box is usually within the range of (length ≤ 300mm, width ≤ 150mm, height ≤ 50mm), which is a compact design. The specific external dimensions of this application are 283.5mm (length) x 135mm (width) x 40mm (height). Within this range and compared with similar power control black boxes, it has a higher space utilization rate and is more compact.

[0026] In one possible implementation, the sub-lock body 31 has a narrowing design at its lower end, forming guide ramps 311 on both sides to facilitate insertion into the mother lock body; the upper end of the sub-lock body 31 has a widened portion, and the hook step 312 formed at the junction of the widened portion and the insert foot 22 is used to form a lock.

[0027] In one possible implementation, the main lock body includes a fixed housing 41 fixed inside the box body. The fixed housing 41 has a locking cavity 42 extending longitudinally. A sliding lock cylinder 43 can move vertically in the locking cavity 42. An extension 44 is connected to the upper part of the sliding lock cylinder 43. A pair of opposing elastic claws 45 are connected to the upper part of the extension 44. A locking area 46 for accommodating the sub-lock body 31 is formed between the two elastic claws 45. Locking protrusions 451 are provided on the inner side of the two elastic claws 45. The two locking protrusions 451 can engage with the two hook steps 312 to achieve locking.

[0028] In one possible implementation, the two elastic claws 45 have an outward expansion elastic tendency in their natural state, so that the locking area 46 remains open when not constrained by external forces; both sides of the upper end of the fixed housing 41 are provided with pressing surfaces 411. When the sliding lock cylinder 43 moves downward relative to the fixed housing 41, the two elastic claws 45 will undergo opposing elastic deformation due to the radial constraint of the pressing surfaces 411, thereby causing the locking protrusions 451 on the inner side of the two elastic claws 45 to retract inward, thereby achieving engagement and locking with the hook step 312.

[0029] In one possible implementation, the front end of the fixed housing 41 is provided with a longitudinal limiting hole 51, and the sliding lock cylinder 43 has a limiting block 52 that extends into the limiting hole 51; the limiting block 52 can continue to limit the position after abutting against the upper and lower ends of the limiting hole 51 respectively.

[0030] In one possible implementation, a spring 61 is provided at the bottom of the locking cavity 42. The upper end of the spring 61 abuts against the sliding lock cylinder 43 and provides an upward preload to the sliding lock cylinder 43, so that the sliding lock cylinder 43 has an upward reset tendency, thereby keeping the locking area 46 between the two elastic claws 45 in an open state.

[0031] In one possible implementation, a rotating shaft 71 is hinged to one end of the sliding lock cylinder 43. The end of the rotating shaft 71 has a locking protrusion 711. A locking member is fixedly installed in the locking cavity 42. The locking member consists of an upper locking section 81 and a lower locking section 82, forming a locking gap 91 between the upper locking section 81 and the lower locking section 82. An guide slope 811 is provided at the upper end of the upper locking section 81. When the sliding lock cylinder 43 moves downward relative to the fixed housing 41, the locking protrusion 711 slides into the locking gap 91 along the guide slope 811. A locking recess 81 is provided at the lower end of the upper locking section 81. 2. A first guide slope 813 is provided on one side of the locking recess 812, and the two are connected by a transition surface 814. A second guide slope 821 is provided at the upper end of the lower locking section 82. After the locking protrusion 711 slides into the locking gap 91, it engages with the locking recess 812, thus achieving locking. In the locked state, applying downward pressure to the shielding metal frame 21 causes the locking protrusion 711 to slide out of the locking recess 812 along the transition surface 814, and then slide out of the locking gap 91 along the first guide slope 813 and the second guide slope 821, thereby achieving unlocking. It should be understood that there will be a gap between the shielding metal frame 21 and the circuit board body 11 to allow the shielding metal frame 21 to move downward.

[0032] In one possible implementation, the locking protrusion 711 has a circular cross-sectional shape.

[0033] The working principle of this embodiment is as follows: Initial positioning: Align the shielding metal frame 21 with the area 12 to be shielded (covering the DC-DC module) on the circuit board body 11, and insert the embedded feet 22 on both sides into the embedded holes 13 of the circuit board body 11.

[0034] Guided insertion: The guide slope 311 at the lower end of the sub-lock body 31 first contacts the entrance of the main lock body. Under the action of the guide slope 311, the sub-lock body 31 is smoothly guided into the locking area 46 composed of two elastic claws 45.

[0035] Triggering Locking: As the shielding metal frame 21 continues to press down, the sub-lock body 31 pushes the sliding lock cylinder 43 to overcome the preload of the spring 61 and move downward within the locking cavity 42. As the sliding lock cylinder 43 moves downward, a pair of elastic claws 45 connected to its upper part also move downward. When the elastic claws 45 move to the pressing surface 411 area at the upper end of the fixed housing 41, the claws, which originally expanded outward due to their natural state, are forced to undergo opposing elastic deformation and retract inward due to the radial constraint of the pressing surface 411. After being retracted, the locking protrusions 451 on the inner side of the two elastic claws 45 precisely engage with the hook step 312 formed at the junction of the upper end of the sub-lock body 31 and the embedded foot 22; at the same time, the locking protrusion 711 slides into the locking interval 91 along the guide slope 811, and then engages with the locking recess 812, thus achieving locking; since the locking protrusion 711 engages with the locking recess 812, the spring 61 cannot drive the sliding lock cylinder 43 to move upward, and the two elastic claws 45 firmly hold the sub-lock body 31, thereby shielding the metal frame 21 to be firmly fixed and unable to come out upward.

[0036] Unlocking and disassembly process: When it is necessary to disassemble the shielding metal frame 21, the user directly applies a downward pressing force to the shielding metal frame 21 itself. The sub-lock body 31 transmits this pressing force to the elastic claw 45 and the sliding lock cylinder 43 that are engaged with it, forcing the sliding lock cylinder 43 to move downward a short distance again in the locking cavity 42. This downward movement of the sliding lock cylinder 43 causes the locking protrusion 711 to slide out of the locking recess 812 along the transition surface 814, and then along the first guide slope 813 and the second guide slope. Surface 821 slides out of locking interval 91, thereby unlocking; then, sliding lock cylinder 43 can move upward under the drive of spring 61, so that the tops of the two elastic claws 45 move out of the pressing surface 411 area of ​​fixed housing 41; once freed from the constraint of pressing surface 411, the elastic claws 45, by virtue of the elasticity of their own material, quickly expand outward to restore their original shape. As the elastic claws 45 expand, the locking protrusion 451 on its inner side also disengages from the hook step 312 of sub-lock body 31, and the lock is released.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the utility model as defined by the appended claims and their equivalents.

Claims

1. A power control black box with a circuit board shielding metal frame structure, characterized in that, The device includes a housing containing a circuit board body (11). The circuit board body (11) has a shielding area (12) covered by a shielding metal frame (21). The shielding metal frame (21) has two downwardly extending inserts (22) on opposite sides. The circuit board body (11) has insert holes (13) for the two inserts (22) to pass through. Each insert (22) has a lower end with a sub-lock body (31). The body has two female lock bodies, which are located below the two embedded holes (13) of the circuit board body (11) respectively, so that two female lock bodies (31) can be inserted into them respectively. The female lock bodies (31) and the female lock bodies together form a locking mechanism. When the female lock body (31) is inserted into the female lock body, the locking mechanism will lock itself. After the locking mechanism has locked, when a downward pressing force is applied to the shielding metal frame (21), the locking mechanism can be triggered to switch from locking to unlocking, thereby realizing the release of the shielding metal frame (21).

2. The power control black box with circuit board shielding metal frame structure according to claim 1, characterized in that: The sub-lock body (31) has a narrowed design at its lower end, forming guide slopes (311) on both sides to facilitate insertion into the mother lock body; the upper end of the sub-lock body (31) has a widened portion, and the hook step (312) formed at the junction of the widened portion and the embedded foot (22) is used to form a lock.

3. The power control black box with circuit board shielding metal frame structure according to claim 2, characterized in that: The main lock body includes a fixed housing (41) fixed inside the box body. The fixed housing (41) has a locking cavity (42) extending longitudinally. A sliding lock cylinder (43) can move vertically in the locking cavity (42). An extension (44) is connected to the upper part of the sliding lock cylinder (43). A pair of opposing elastic claws (45) are connected to the upper part of the extension (44). A locking area (46) for accommodating the sub-lock body (31) is formed between the two elastic claws (45). Locking bosses (451) are provided on the inner side of the two elastic claws (45). The two locking bosses (451) can engage with the two hook steps (312) to achieve locking.

4. The power control black box with circuit board shielding metal frame structure according to claim 3, characterized in that: The two elastic claws (45) have an outward expansion elastic tendency in their natural state, so that the locking area (46) remains open when not constrained by external forces. Both sides of the upper end of the fixed housing (41) are provided with pressing surfaces (411). When the sliding lock cylinder (43) moves down relative to the fixed housing (41), the two elastic claws (45) will be radially constrained by the pressing surfaces (411) and undergo opposing elastic deformation, thereby causing the locking protrusions (451) on the inner side of the two elastic claws (45) to retract inward, thereby achieving engagement and locking with the hook step (312).

5. A power control black box with a circuit board shielded metal frame structure according to claim 3, characterized in that: The fixed housing (41) has a longitudinal limiting hole (51) at its front end, and the sliding lock cylinder (43) has a limiting block (52) that extends into the limiting hole (51).

6. A power control black box with a circuit board shielded metal frame structure according to claim 3, characterized in that: The bottom of the locking cavity (42) is provided with a spring (61), the upper end of which abuts against the sliding lock cylinder (43) and provides an upward preload force to the sliding lock cylinder (43), so that the sliding lock cylinder (43) has an upward reset tendency, thereby keeping the locking area (46) between the two elastic claws (45) in an open state.

7. A power control black box with a circuit board shielded metal frame structure according to claim 3, characterized in that: The sliding lock cylinder (43) is hinged to a rotating shaft (71) at one end. The rotating shaft (71) has a locking protrusion (711) at its end. A locking member is fixedly installed in the locking cavity (42). The locking member consists of an upper locking section (81) and a lower locking section (82). A locking gap (91) is formed between the upper locking section (81) and the lower locking section (82). An guide slope (811) is provided at the upper end of the upper locking section (81). When the sliding lock cylinder (43) moves downward relative to the fixed housing (41), the locking protrusion (711) slides into the locking gap (91) along the guide slope (811). A locking recess (811) is provided at the lower end of the upper locking section (81). 12), and a first guide slope (813) is provided on one side of the locking recess (812), and the two are connected by a transition surface (814). A second guide slope (821) is provided at the upper end of the lower locking section (82). After the locking protrusion (711) slides into the locking interval (91), it will engage with the locking recess (812) to achieve locking. In the locked state, applying a downward pressing force to the shielding metal frame (21) will cause the locking protrusion (711) to slide out of the locking recess (812) along the transition surface (814), and then slide out of the locking interval (91) along the first guide slope (813) and the second guide slope (821) to achieve unlocking.

8. A power control black box with a circuit board shielded metal frame structure according to claim 7, characterized in that: The locking protrusion (711) has a circular cross-sectional shape.

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