Structure for oil-contaminated short-circuit sealing of terminal blocks

Abstract

A structure for preventing oil short circuits in a terminal block includes: a terminal block and a plurality of terminals; wherein the terminal block has a bottom surface and a wiring surface; each terminal protrudes from both ends of the wiring surface and the bottom surface, and respectively forms a wiring portion and a lead portion capable of connecting a wire; a drainage groove is recessed between each lead portion on the bottom surface of the terminal block, and at least two corresponding support portions are provided on the side of each lead portion, with the bottom end of each support portion forming a gap with the bottom surface of the terminal block that is much smaller than the height (depth) of the drainage groove. The height difference creates a gap between the circuit board and the connected circuit board that is much smaller than the height (depth) of the guide groove. Since the resistance of the guide groove to guide the airflow is much lower than the resistance of the airflow through the gap, the possibility of dust, impurities and oil in the air seeping into the gap and accumulating around the pins and causing short circuits can be effectively reduced. In addition, the gap can maintain the contact between the pins and the outside air for heat dissipation, and can also effectively reduce the heat accumulation generated by the pins during operation.

Description

Technical Field

[0001] This utility model relates to a structure for preventing oil short circuits in terminal blocks, and more particularly to a terminal block structure that can effectively reduce the unintended accumulation of dust, impurities and oil in the air around each terminal block, while maintaining better heat dissipation characteristics. Background Technology

[0002] Because many industrial processing and production sites are in dusty and oily environments, the flowing air often carries a large amount of dust, impurities and oil.

[0003] Traditional terminal block structures on circuit boards typically have flat bottom surfaces for stable attachment to the circuit board. However, due to limitations in the manufacturing precision of the circuit board and terminal block, it is difficult to achieve a completely seamless fit between the bottom surfaces of the two components. Consequently, minute gaps inevitably form between the mating surfaces of the circuit board and terminal block. In practical applications, dust, impurities, and oil from the airflow regularly accumulate around these gaps and gradually seep into the space between the circuit board and terminal block, causing the insulation distance between the terminals on the terminal block to gradually shorten or disappear, leading to short circuits and leakage.

[0004] In addition, if the bottom surface of the terminal block is designed to be a completely flat surface that can be fully attached to the circuit board, then after assembly, each terminal pin will be completely covered by the material of the terminal block housing and the circuit board, and will be far from the outside of the terminal block. This will easily lead to poor heat dissipation during operation, causing the terminal pins to overheat, affecting conductivity and safety.

[0005] In view of the above-mentioned shortcomings of conventional terminal blocks in practical applications, the inventors researched ways to improve these shortcomings, and finally this utility model was produced. Utility Model Content

[0006] The main objective of this utility model is to provide a structure for sealing oil-contaminated short circuits in a terminal block, comprising: a terminal block and a plurality of terminals; wherein the terminal block has a bottom surface and a wiring surface; each terminal has one end protruding from the wiring surface to form a wiring portion capable of connecting a wire, and the other end of each terminal protruding from the bottom surface to form a pin portion; a guide groove is recessed between each pin portion on the bottom surface of the terminal block, and at least two corresponding support portions are provided on the side of each pin portion, with the bottom end of each support portion forming a gap with the bottom surface of the terminal block. A height difference much smaller than the height (depth) of the guide groove creates a gap between it and the circuit board connected to it that is much smaller than the height (depth) of the guide groove. Since the resistance of each guide groove to guide the flow of air is much lower than the resistance of the flow of air through the gap, the possibility of dust, impurities and oil in the air seeping into the gap and accumulating around each pin and causing a short circuit can be effectively reduced. At the same time, the gap can maintain the contact between each pin and the outside air for heat dissipation, and can further reduce the heat accumulation generated by the heat generated by each pin during operation.

[0007] Another objective of this invention is to provide a structure for sealing oil-contaminated short circuits in a terminal block, wherein the preferred dimensions of each of the guide grooves are: a width of not less than 1.5 mm, a height of not less than 0.5 mm, and a cross-sectional area formed by the product of the width and height being greater than 3 mm². 2 The design allows each of the airflow channels to be adapted to terminal blocks of various sizes and shapes, and to produce the best airflow guidance effect. At the same time, each of the airflow channels is provided with a recessed deep space, which can effectively increase the cross-sectional area of ​​the airflow channel to reduce the resistance of the flowing air through the airflow channel.

[0008] Another objective of this utility model is to provide a structure for sealing oil short circuits in a terminal block, wherein each of the supporting parts can be configured with different structural variations at the bottom of the terminal block, such as extending laterally (along the direction perpendicular to the flow channel) or longitudinally (along the direction parallel to the flow channel), to meet the needs of various applications.

[0009] To achieve the above objectives and effects, the technical means implemented by this utility model include: a structure for sealing oil short circuits in a terminal block, comprising at least: a terminal block and a plurality of terminals; wherein the terminal block has a bottom surface and a wiring surface is provided on at least one other surface other than the bottom surface; each terminal protrudes from one end of the wiring surface to form a wiring portion capable of connecting a wire, and the other end of each terminal protrudes from the bottom surface to form a pin portion; characterized in that: a guide groove is recessed between each pin portion on the bottom surface of the terminal block, and at least two corresponding support portions are provided on the side of each pin portion, the guide groove and the bottom end of the support portion have a height difference, and the height difference between the bottom end of each support portion and the bottom surface of the terminal block is much smaller than the height between the guide groove and the bottom end of the support portion.

[0010] According to the above structure, each of the flow guide grooves extends along the bottom of the terminal block in one of the longitudinal and transverse directions and forms a through connection at both ends.

[0011] According to the above structure, the width of the guide channel is not less than 1.5mm, the height is not less than 0.5mm, and the cross-sectional area formed by multiplying the width and height is greater than 3mm². 2 .

[0012] According to the above structure, each of the flow guide grooves is provided with a deep recessed space facing the inward of the terminal block.

[0013] According to the above structure, the terminal block is provided with a fence to separate each wiring terminal; each of the flow guide grooves is respectively provided below the corresponding fence and parallel to the fence.

[0014] According to the above structure, the terminal block is assembled on a circuit board with each of the support portions, so that a gap is formed between the circuit board and the bottom surface that is much smaller than the height between the guide groove and the bottom end of the support portion. Attached Figure Description

[0015] To provide a more concrete understanding of the above-mentioned objectives, effects, and features of this utility model, the following description is provided with reference to the accompanying drawings: Figure 1 This is a bottom view and an exploded three-dimensional view of the circuit board of the first embodiment of this utility model.

[0016] Figure 2 This is a bottom view of the structural structure of the first embodiment of this utility model.

[0017] Figure 3 This is a top view of the first embodiment of the present invention and a three-dimensional structural combination diagram of the circuit board.

[0018] Figure 4 yes Figure 3Side view sectional view along the AA direction.

[0019] Figure 5 This is a bottom view and an exploded three-dimensional view of the circuit board of the second embodiment of this utility model.

[0020] Figure 6 This is a bottom view of the structural structure of the second embodiment of this utility model.

[0021] Figure 7 This is a top view of the second embodiment of the present invention and a three-dimensional structural combination diagram of the circuit board.

[0022] Figure 8 yes Figure 7 Side view sectional view along the BB direction.

[0023] Explanation of symbols in the attached diagram: 1,10: Terminal blocks 11: Wiring Surface 111: Fence 12: Bottom surface 13: Guide channel 131: Deep Concave Space 14,140: Support section 15, 150: Gap 2: Wiring terminals 21: Wiring section 22: Foot joint 3: Circuit board 31: Socket Detailed Implementation

[0024] The directional terms used in the following embodiments, such as up, down, left, right, front, and back, are only for reference to the accompanying drawings. Therefore, the directional terms used are for ease of explanation and not for limiting the present invention. Furthermore, in the following embodiments, identical or similar components will be designated with identical or similar numbers, and redundant descriptions will be appropriately omitted.

[0025] Please refer to Figures 1 to 4 As shown, the structure of the first embodiment of the present invention includes: a terminal block 1 and a wiring terminal 2; wherein the terminal block 1 has a bottom surface 12 below it, and a wiring surface 11 is provided on at least one other surface other than the bottom surface 12; one end of each wiring terminal 2 protrudes from the bottom surface 12 to form a downwardly protruding contact portion 22, and the other end of each wiring terminal 2 protrudes from the wiring surface 11 to form a wiring portion 21 that can connect to a wire, and the terminal block 1 is provided with a fence 111 that separates each wiring terminal 2.

[0026] In the above structure, the bottom surface 12 of the terminal block 1 is provided with at least one longitudinal (or transverse) extending channel 13 between each of the pins 22 and extending through both ends; in practical applications, each channel 13 can be provided as needed at a position below (and parallel to) each of the corresponding fences 111, and a recessed space 131 can be provided inside the channel 13 as needed towards the terminal block 1.

[0027] At least two corresponding support portions 14 are provided on the periphery of each of the corresponding pin portions 22. In this embodiment, the two support portions 14 are respectively disposed between each of the flow guide grooves 13 and extend laterally (in a direction perpendicular to each of the flow guide grooves 13). A height (depth) is formed between the flow guide grooves 13 and the support portions 14, and a height difference is formed between the bottom end of each support portion 14 and the bottom surface 12 of the terminal block 1 that is much smaller than the height (depth) of the flow guide grooves 13.

[0028] In one feasible embodiment, although there is no specific limitation on the size of the guide channel 13, after actual testing, the preferred specifications are: a width of not less than 1.5 mm, a height (depth) of not less than 0.5 mm, and a cross-sectional area formed by the product of the width and height greater than 3 mm². 2 The design allows each of the flow channels 13 to be adapted to different sizes and shapes of the commonly used terminal blocks 1, thereby producing better airflow guidance effects. At the same time, the design of each deep recess 131 can effectively increase the cross-sectional area of ​​each flow channel 13, thereby further reducing the resistance of flowing air through each flow channel 13.

[0029] During assembly, the terminal block 1 is attached to the surface of a circuit board 3 with its bottom surface 12 on one side. Then, the pin 22 is inserted through the corresponding hole 31 on the circuit board 3 and soldered onto the circuit board 3. With the support 14 supporting the circuit board 3, a gap 15 much smaller than the height (depth) of the guide groove 13 can be formed between the bottom surface 12 of the terminal block 1 and the circuit board 3.

[0030] In practical applications, since the height of the gap 15 is much smaller than the height (depth) of the guide groove 13, when the flowing air on the surface of the circuit board 3 or around the terminal block 1 passes through the terminal block 1, the sides of the terminal block 1 will block most of the external flowing air, and the air will be guided into and through the guide groove 13 where the resistance drops abruptly.

[0031] At this time, utilizing the basic principle of fluid dynamics that fluids tend to flow along the path of least resistance, dust, impurities, and oil in the air flowing through each of the guide grooves 13 will quickly pass through each guide groove 13 with the airflow, and will not easily stick or stagnate in each guide groove 13. Furthermore, since the gap 15 between the bottom surface 12 of the terminal block 1 and the circuit board 3 is much smaller than the height of the guide groove 13, the resistance of the airflow entering between the bottom surface 12 of the terminal block 1 and the circuit board 3 through the gap 15 is much greater than the resistance of flowing in the guide groove 13. Therefore, it is possible to effectively prevent the aforementioned dust, impurities, and oil from being carried by the airflow to the area near each pin 22. This effectively prevents the accumulation of conductive dust, impurities, and oil between each pin 22, which could lead to reduced insulation distance and leakage, short circuits, or other problems.

[0032] During the process of the airflow being guided through each of the guide grooves 13, in addition to the design of each of the deep recesses 131 forming a smoother airflow effect, since the periphery of each of the pins 22 can be connected to each of the guide grooves 13 through each of the gaps 15, the negative pressure generated by the airflow in each of the guide grooves 13 can create a gentle airflow and heat dissipation between each of the gaps 15 and each of the guide grooves 13, thus significantly reducing the heat accumulation problem caused by the heat generated when each of the pins 22 is working.

[0033] Please refer to Figures 5 to 8 As shown, the structure of the second embodiment of the present invention includes: a terminal block 10, and a wiring terminal 2 identical to that in the first embodiment; wherein the terminal block 10 has a bottom surface 12 and a wiring surface 11; one end of each wiring terminal 2 protrudes from the bottom surface 12 to form a contact portion 22, and the other end of each wiring terminal 2 protrudes from the wiring surface 11 to form a wiring portion 21 capable of connecting wires, and the terminal block 10 is provided with a fence 111 separating each wiring terminal 2.

[0034] In the above structure, the bottom surface 12 of the terminal block 10 is provided with the same flow channel 13, deep recess 131 and other structures as in the first embodiment between each of the pins 22; at least two corresponding support portions 140 are respectively protruding on the periphery of each of the pins 22; in this embodiment, the two support portions 140 are respectively disposed between each of the flow channel 13 and extend longitudinally (along the direction parallel to each of the flow channel 13), and a height (depth) is formed between the flow channel 13 and the support portion 140, and a height difference much smaller than the height (depth) of the flow channel 13 is formed between the bottom end of each support portion 140 and the bottom surface 12 of the terminal block 1.

[0035] During assembly, the terminal block 10 is attached to the surface of a circuit board 3 with its bottom surface 12 on one side. The pin 22 is then inserted through the corresponding hole 31 on the circuit board 3 and soldered onto the circuit board 3. With each of the support parts 140 supporting the circuit board 3, a gap 150 much smaller than the height (depth) of the guide groove 13 can be formed between the bottom surface 12 of the terminal block 10 and the circuit board 3.

[0036] In practical applications, since the height of the gap 150 is much smaller than the height (depth) of the guide groove 13, when the air flowing on the surface of the circuit board 3 or around the terminal block 10 passes through the terminal block 10, the sides of the terminal block 10 will block most of the external airflow and guide most of the airflow into and through the guide grooves 13 where the resistance drops abruptly; and since the gap 150 between the bottom surface 12 of the terminal block 10 and the circuit board 3 is much smaller than the height of the guide groove 13, only a very small portion of the airflow enters and passes through the gap 150.

[0037] At this time, the airflow through each of the guide grooves 13 can work in conjunction with the design of each of the deep recesses 131 to create a smoother airflow effect. This allows most of the dust, impurities, and oil in the air to pass quickly through each of the guide grooves 13 with the airflow, and they are less likely to stick and stagnate in each of the guide grooves 13. This effectively prevents the aforementioned dust, impurities, and oil from being carried by the airflow to the area near each of the pins 22, thereby avoiding the accumulation of conductive dust, impurities, and oil between each of the pins 22, which could lead to a reduction in insulation distance and cause leakage, short circuits, or other problems.

[0038] While most of the airflow is guided through each of the guide grooves 13, a very small portion of the airflow can be used to gently pass through the gap 150 to create airflow and heat dissipation around each of the pins 22, thereby reducing the heat buildup caused by the heat generated when each of the pins 22 is working.

[0039] In summary, the oil-smudge short-circuit sealing structure of the terminal block of this utility model effectively reduces the accumulation of dust, impurities, and oil on the periphery of each terminal block and improves heat dissipation. It is a novel and progressive utility model, and a utility model patent application is hereby filed in accordance with the law. However, the above description is only a description of the preferred embodiment of this utility model. All variations, modifications, alterations, or equivalent substitutions that extend from the technical means and scope of this utility model should also fall within the scope of this utility model patent application.

Claims

1. An oil short circuit blocking structure of a terminal block, comprising at least: A terminal block (1, 10) and a plurality of terminals (2); wherein the terminal block (1) has a bottom surface (12) and a wiring surface (11) is provided on at least one other surface other than the bottom surface (12); each terminal (2) has one end protruding from the wiring surface (11) to form a wiring portion (21) capable of connecting a wire, and the other end of each terminal (2) protruding from the bottom surface (12) to form a pin portion (22); characterized in that: on the bottom surface (12) of the terminal block (1, 10) the terminals (1, 10) have a wiring surface (11) for connecting a wire. A flow guide groove (13) is recessed between the pins (22), and at least two corresponding support parts (14, 140) are provided on the side of each pin (22). There is a height between the bottom end of the flow guide groove (13) and the bottom end of the support part (14, 140), and the height difference between the bottom end of each support part (14, 140) of the terminal block (1, 10) and the bottom surface (12) of the terminal block (1, 10) is much smaller than the height between the bottom end of the flow guide groove (13) and the bottom end of the support part (14, 140).

2. The structure for preventing oil contamination and short circuit of a terminal block according to claim 1, wherein Each of the flow guide grooves (13) extends along the bottom of the terminal block (1, 10) in one of the longitudinal or transverse directions and forms a through connection at both ends.

3. The structure for preventing oil contamination and short circuit according to claim 2, wherein The width of the flow guide groove (13) is not less than 1.5 mm, the height is not less than 0.5 mm, and the cross-sectional area formed by the product of the width and the height is greater than 3 mm 2 .

4. The structure for sealing oil-contaminated short circuits in the terminal block according to claim 1, 2, or 3, characterized in that, Each of the flow guide grooves (13) is provided with a deep recessed space (131) that is recessed toward the terminal block (1, 10).

5. The structure for sealing oil-contaminated short circuits in the terminal block according to claim 1, 2, or 3, characterized in that, The terminal block (1, 10) is provided with a fence (111) separating each terminal (2); each of the flow guide grooves (13) is respectively provided below the corresponding fence (111) and parallel to the fence (111).

6. The structure for sealing oil-contaminated short circuits in the terminal block according to claim 4, characterized in that, The terminal block (1, 10) is provided with a fence (111) separating each terminal (2); each of the flow guide grooves (13) is respectively provided below the corresponding fence (111) and parallel to the fence (111).

7. The structure for sealing oil-contaminated short circuits in the terminal block according to claim 1, 2, or 3, characterized in that, The terminal blocks (1, 10) are assembled on a circuit board (3) with each of the support portions (14, 140), so that a gap (15, 150) is formed between the circuit board (3) and the bottom surface (12) that is much smaller than the height between the guide groove (13) and the bottom end of the support portion (14, 140).

8. The structure for sealing oil-contaminated short circuits in the terminal block according to claim 4, characterized in that, The terminal blocks (1, 10) are assembled on a circuit board (3) with each of the support portions (14, 140), so that a gap (15, 150) is formed between the circuit board (3) and the bottom surface (12) that is much smaller than the height between the guide groove (13) and the bottom end of the support portion (14, 140).

9. The structure for sealing oil-contaminated short circuits in the terminal block according to claim 5, characterized in that, The terminal blocks (1, 10) are assembled on a circuit board (3) with each of the support portions (14, 140), so that a gap (15, 150) is formed between the circuit board (3) and the bottom surface (12) that is much smaller than the height between the guide groove (13) and the bottom end of the support portion (14, 140).

10. The structure for sealing oil-contaminated short circuits in the terminal block according to claim 6, characterized in that, The terminal blocks (1, 10) are assembled on a circuit board (3) with each of the support portions (14, 140), so that a gap (15, 150) is formed between the circuit board (3) and the bottom surface (12) that is much smaller than the height between the guide groove (13) and the bottom end of the support portion (14, 140).

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