Structure for preventing oil pollution short circuit of terminal block

Abstract

The structure of preventing oil short circuit of terminal block includes a terminal block and a plurality of terminal; the terminal block has a bottom surface and a wiring surface; the terminal extends one end on the wiring surface to form a wiring part which can combine the wire; the other end of the terminal extends on the bottom surface to form a pin part; the bottom surface of the terminal block is concave between the pin parts to form a flow channel; the pin part is concave to form a surrounding part around the pin part; the surrounding part is convex compared with the concave part and the flow channel; the surrounding part can be inserted between the terminal block and the inserted surface (such as circuit board) to form a surrounding mechanism to prevent the dust, impurities and oil in the flowing air from entering the concave part; the flowing air is guided to the flow channel to prevent the accumulation of the oil and impurities.

Description

Technical Field

[0001] This utility model relates to a structure for preventing oil-contaminated short circuits in terminal blocks, and more particularly to a structure that can effectively isolate the accumulation of dust, impurities and oil in the air, so as to prevent the insulation distance between the terminals from shortening due to the accumulation of the above-mentioned contaminants, and avoid short circuits and leakage. 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 a flat bottom surface for stable mounting. 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 their bottom surfaces. Consequently, gaps inevitably remain between the mating surfaces of the circuit board and terminal block after their relative assembly. In practical applications, dust, impurities, and oil from the airflow gradually accumulate and seep into the space between the circuit board and terminal block through these gaps. This often causes the insulation spacing between the terminals on the terminal block to gradually shorten or even disappear, resulting in 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 and 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 invention is to provide a structure for preventing oil contamination and 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 protrudes from one end of the wiring surface to form a wiring portion capable of connecting wires, and the other end of each terminal protrudes 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 a recess is provided on the periphery of each pin portion, so that an outer frame portion protrudes from the periphery of each pin portion and is formed around each recess portion; by means of the guide groove and the basic principle of fluid dynamics that fluid flow tends to flow along the path of least resistance, a natural unblocking function can be generated to guide the flowing air to preferentially pass through each guide groove, and the outer frame portion can also prevent dust, impurities and oil in the air flowing around the terminal block from penetrating into the recess and contaminating the periphery of each pin portion.

[0007] Another objective of this invention is to provide a structure for preventing oil-contaminated short circuits in a terminal block, wherein the preferred dimensions of each of the drainage grooves are: a width of not less than 1.5 mm, a height of not less than 0.5 mm, and the cross-sectional area formed by the product of the width and height is 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 preventing oil contamination and short circuits in a terminal block, wherein each recessed portion can form an incompletely enclosing structure around each pin, and each outer frame portion has a relatively thin thickness. This not only shortens the distance between the recessed portion and the outside of the terminal block, thereby improving the heat dissipation effect of the recessed portion and reducing the heat accumulation problem caused by the heat generated by the pins during operation, but also facilitates the control of the flatness of the bottom edge surface of the outer frame portion in terms of manufacturing and processing, thereby reducing the assembly gap between the terminal block and the circuit board and improving the blocking effect against the aforementioned contaminants.

[0009] To achieve the above objectives and effects, the technical means implemented by this utility model include: a structure for preventing oil contamination and short circuits in a terminal block, comprising: a terminal block and a plurality of terminals; wherein the terminal block has a bottom surface and at least one other surface other than the bottom surface is provided with a wiring surface; each terminal protrudes from the wiring surface at one end 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 a recess is provided on the periphery of each pin portion, such that an outer frame portion is formed around each recess portion, which protrudes relative to the recess portion and the guide groove.

[0010] According to the above structure, each of the guide channels extends along at least one of the longitudinal and transverse directions of the bottom surface and forms a through connection at both ends.

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

[0012] According to the above structure, each of the flow guide grooves is further provided with a recessed deep space facing 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 fixed with a cover on one side corresponding to the wiring surface, and the cover can cover the top of each wiring part.

[0015] According to the above structure, the bottom of the outer frame is provided with a bottom edge surface, the terminal block is attached to a circuit board with the bottom edge surface, and the circuit board is provided with a socket corresponding to each of the pins. Attached Figure Description

[0016] 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 of the structure and an exploded three-dimensional view of the circuit board of this utility model.

[0017] Figure 2 This is a bottom-view plan view of the structure of this utility model.

[0018] Figure 3 This is a top view of the present invention and a three-dimensional structural combination diagram of the circuit board.

[0019] Figure 4 yes Figure 3 Side view sectional view along the AA direction.

[0020] Explanation of symbols in the attached diagram: 1: Terminal block 11: Wiring Surface 111: Fence 12: Bottom surface 121: Guide channel 122: Depression 123: Outer frame 1231: Bottom edge face 124: Deep Recessed Space 2: Wiring terminals 21: Wiring section 22: Foot joint 3: Seat Cover 4: Circuit board 41: Socket Detailed Implementation

[0021] 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.

[0022] Please refer to Figures 1 to 4 As shown, the main structure of this utility model 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.

[0023] In the above structure, the bottom surface 12 of the terminal block 1 is provided with at least one longitudinal (or transverse) extending channel 121 between each of the pins 22 and penetrating to both ends; in practical applications, each channel 121 can be provided as needed at a position below (and parallel to) each of the corresponding fences 111, and a recessed space 124 can be provided inside the channel 121 as needed facing the terminal block 1.

[0024] Furthermore, a recessed portion 122 with an inward indentation is provided on the periphery of each corresponding pin portion 22, facing the terminal base 1. Each recessed portion 122 can form a surrounding periphery of each pin portion 22 (including between each guide groove 121). Compared with the protruding outer frame portion 123 of the recessed portion 122 and the guide groove 121, since the outer frame portion 123 has a narrower cross-sectional area, the bottom edge surface 1231 below the outer frame portion 123 is easier to achieve the goal of consistent flatness during processing compared to the completely flat bottom surface.

[0025] In one feasible embodiment, although there is no specific limitation on the size of the guide channel 121, 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 121 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 124 can effectively increase the cross-sectional area of ​​each flow channel 121, thereby further reducing the resistance of flowing air through each flow channel 121.

[0026] During assembly, the terminal block 1 is attached to the surface of a circuit board 4 at least with the bottom edge 1231 of the outer frame portion 123, and the pin portion 22 passes through the corresponding insertion hole 41 on the circuit board 4 and is then soldered. Since the outer frame portion 123 has a bottom edge 1231 with more uniform flatness, it can maintain a closer fit with the surface of the circuit board 4, thereby greatly reducing the possibility of gaps between the bottom edge 1231 of the outer frame portion 123 and the surface of the circuit board 4.

[0027] In the above structure, the terminal block 1 can be fitted with a cover 3 as needed on the side corresponding to the wiring surface 11, and the cover 3 can cover the top of each wiring part 21 to form a shielding and protective effect.

[0028] In practical applications, when the air flowing on the surface of the circuit board 4 passes through the terminal block 1, the bottom edge 1231 of the outer frame portion 123 of the terminal block 1 is in close (gap-free) contact with the surface of the circuit board 4, leaving only the guide grooves 121 for air circulation. Therefore, the outer frame portion 123 can effectively prevent dust, impurities and oil stains in the external airflow from penetrating or accumulating on the periphery of the pin portion 22 in the recessed portion 122, which can effectively avoid leakage, short circuit and other situations caused by the reduction of the insulation distance between the pin portions 22.

[0029] Furthermore, the design of each deep recess 124 allows for smoother airflow in each guide groove 121. When the airflow blocked by each outer frame 123 is guided through each guide groove 121, it increases the airflow and effectively reduces the possibility of the airflow passing through each guide groove 121 seeping into the recess 122 through the gap between the bottom edge 1231 of each outer frame 123 and the circuit board 4. Moreover, since each recess 122 forms partially exposed areas around each pin 22, it can dissipate heat generated during the conduction process. Combined with the thinner structure of each outer frame 123, the isolation distance between the recess 122 and the outside of the terminal block 1 can be significantly shortened, further reducing the heat accumulation problem caused by the heat generated during the operation of each pin 22.

[0030] In summary, the oil- and short-circuit-proof structure of the terminal block of this utility model effectively isolates dust, impurities, and oil from the air, preventing short circuits and leakage between terminals due to shortened insulation spacing. This is a novel and progressive utility model, and a utility model patent application is hereby filed. However, the above description is only a preferred embodiment of this utility model. Any variations, modifications, alterations, or equivalent substitutions derived from the technical means and scope of this utility model should also fall within the scope of this utility model patent application.

Claims

1. A structure for preventing oil-contaminated short circuits in a terminal block, comprising: A terminal block (1) 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 wires, and the other end of each terminal (2) protrudes from the bottom surface (12) to form a pin portion (22); characterized in that: a guide groove (121) is recessed between each pin portion (22) on the bottom surface (12) of the terminal block (1), and a recessed portion (122) is provided on the periphery of each pin portion (22), such that an outer frame portion (123) is formed around each recessed portion (122) and protrudes relative to the recessed portion (122) and the guide groove (121).

2. The structure of the terminal block for preventing oil contamination and short circuits according to claim 1, characterized in that, Each of the guide channels (121) extends along at least one of the longitudinal and transverse directions of the bottom surface (12) and forms a through connection at both ends.

3. The structure of the terminal block for preventing oil contamination and short circuits according to claim 2, characterized in that, The width of the guide channel (121) is not less than 1.5 mm, the height is not less than 0.5 mm, and the cross-sectional area formed by multiplying the width and height is greater than 3 mm². 2 .

4. The structure of the terminal block for preventing oil contamination and short circuits according to claim 1, 2, or 3, characterized in that, Each of the flow guide grooves (121) is further provided with a recessed deep space (124) facing the terminal block (1).

5. The structure of the terminal block for preventing oil contamination and short circuits according to claim 1, 2, or 3, characterized in that, The terminal block (1) is provided with a fence (111) separating each terminal (2); each of the flow guide grooves (121) is respectively located below the corresponding fence (111) and parallel to the fence (111).

6. The structure of the terminal block for preventing oil contamination and short circuits according to claim 4, characterized in that, The terminal block (1) is provided with a fence (111) separating each terminal (2); each of the flow guide grooves (121) is respectively located below the corresponding fence (111) and parallel to the fence (111).

7. The structure of the terminal block for preventing oil contamination and short circuits according to claim 1, 2, or 3, characterized in that, The terminal block (1) is attached to a cover (3) on one side corresponding to the wiring surface (11), and the cover (3) can cover the top of each wiring part (21).

8. The structure of the terminal block for preventing oil contamination and short circuits according to claim 4, characterized in that, The terminal block (1) is attached to a cover (3) on one side corresponding to the wiring surface (11), and the cover (3) can cover the top of each wiring part (21).

9. The structure of the terminal block for preventing oil contamination and short circuits according to claim 5, characterized in that, The terminal block (1) is attached to a cover (3) on one side corresponding to the wiring surface (11), and the cover (3) can cover the top of each wiring part (21).

10. The structure of the terminal block for preventing oil contamination and short circuits according to claim 6, characterized in that, The terminal block (1) is attached to a cover (3) on one side corresponding to the wiring surface (11), and the cover (3) can cover the top of each wiring part (21).

11. The structure of the terminal block for preventing oil contamination and short circuits according to claim 1, 2, or 3, characterized in that, The bottom of the outer frame (123) is provided with a bottom edge surface (1231), the terminal block (1) is attached to a circuit board (4) with the bottom edge surface (1231), and the circuit board (4) is provided with a socket (41) corresponding to each of the pins (22).

12. The structure of the terminal block for preventing oil contamination and short circuits according to claim 4, characterized in that, The bottom of the outer frame (123) is provided with a bottom edge surface (1231), the terminal block (1) is attached to a circuit board (4) with the bottom edge surface (1231), and the circuit board (4) is provided with a socket (41) corresponding to each of the pins (22).

13. The structure of the terminal block for preventing oil contamination and short circuits according to claim 5, characterized in that, The bottom of the outer frame (123) is provided with a bottom edge surface (1231), the terminal block (1) is attached to a circuit board (4) with the bottom edge surface (1231), and the circuit board (4) is provided with a socket (41) corresponding to each of the pins (22).

14. The structure of the terminal block for preventing oil contamination and short circuits according to claim 6, characterized in that, The bottom of the outer frame (123) is provided with a bottom edge surface (1231), the terminal block (1) is attached to a circuit board (4) with the bottom edge surface (1231), and the circuit board (4) is provided with a socket (41) corresponding to each of the pins (22).

15. The structure of the terminal block for preventing oil contamination and short circuits according to claim 7, characterized in that, The bottom of the outer frame (123) is provided with a bottom edge surface (1231), the terminal block (1) is attached to a circuit board (4) with the bottom edge surface (1231), and the circuit board (4) is provided with a socket (41) corresponding to each of the pins (22).

16. The structure of the terminal block for preventing oil contamination and short circuits according to claim 8, characterized in that, The bottom of the outer frame (123) is provided with a bottom edge surface (1231), the terminal block (1) is attached to a circuit board (4) with the bottom edge surface (1231), and the circuit board (4) is provided with a socket (41) corresponding to each of the pins (22).

17. The structure of the terminal block for preventing oil contamination and short circuits according to claim 9, characterized in that, The bottom of the outer frame (123) is provided with a bottom edge surface (1231), the terminal block (1) is attached to a circuit board (4) with the bottom edge surface (1231), and the circuit board (4) is provided with a socket (41) corresponding to each of the pins (22).

18. The structure of the terminal block for preventing oil contamination and short circuits according to claim 10, characterized in that, The bottom of the outer frame (123) is provided with a bottom edge surface (1231), the terminal block (1) is attached to a circuit board (4) with the bottom edge surface (1231), and the circuit board (4) is provided with a socket (41) corresponding to each of the pins (22).

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