Circuit board, connecting structure and motor controller
By designing a guide section and a straight-through section for the insertion hole structure on the circuit board, the problem of inaccurate pin insertion was solved, achieving accurate insertion and stable fixation of the pins, and reducing the scrap rate and production cost of the motor controller.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-03-24
AI Technical Summary
Traditional through-hole design leads to inaccurate pin insertion and easy deformation, resulting in a low first-pass yield, especially in complex electronic control modules, which increases production costs and reduces product quality.
The circuit board connector is designed with a guide section and a through section structure. The cross-sectional area of the guide section gradually decreases. The guide section is horn-shaped with an inclination angle α of 50° to 70°. The hole diameter and depth are appropriate to ensure that the pins are accurately inserted and fixed.
Improve the first-pass yield of pin crimping, reduce the scrap rate, save production costs, and improve production efficiency and product quality.
Smart Images
Figure CN224037558U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of circuit board technology, and in particular to a circuit board, a connection structure, and a motor controller. Background Technology
[0002] Traditional crimping technology for precision electronic components such as pins typically involves creating through-holes on a PCB (printed circuit board). These through-holes are designed to match the dimensions of the pins so that they can be directly pressed into the holes by mechanical pressure, thus achieving an electrical connection. In this process, the PCB is placed on a specialized crimping machine, and the pin is inserted from the other side of the PCB, forced through the PCB, and secured within the through-hole by pressure. This crimping method is widely used in the electronics manufacturing industry, especially in the production of electronic components such as motor controllers and power modules.
[0003] However, due to the through-hole design, the pins may not be accurately inserted during the initial crimping, requiring a secondary crimping. During this process, the pins are prone to deformation due to uneven pressure, leading to product scrap and reducing yield. Secondly, when dealing with complex electronic control modules, such as single-control, dual-control, or dual-mode modules with a BOOST module, the increased number of pins results in a lower first-pass yield and a higher scrap rate. These issues not only increase production costs but also affect production efficiency and product quality. Utility Model Content
[0004] The main purpose of this invention is to propose a motor stator and motor that aims to guide the crimping of the pins, improve the first-pass yield of crimping, and reduce the scrap rate.
[0005] To achieve the above objectives, this utility model provides a circuit board having a first end face and a second end face disposed opposite to each other. The first end face of the circuit board has an insertion hole extending through to the second end face of the circuit board. The insertion hole includes a guide section and a through section communicating with the guide section. The guide section forms a guide opening for the insertion hole on the first end face of the circuit board, and the cross-sectional area of the guide section gradually decreases in the direction from the first end face to the second end face. The through section forms a fixing opening for the insertion hole on the second end face of the circuit board.
[0006] In one embodiment, the guide segment is a horn structure, and the sidewall of the guide segment is inclined relative to the first end face of the circuit board to form an angle α, wherein 50°≤α≤70°.
[0007] In one implementation, α = 60°.
[0008] In one embodiment, the diameter of the guide port is A, where 1.45mm ≤ A ≤ 1.55mm.
[0009] In one embodiment, the aperture of the fixing port is B, where 1mm ≤ B ≤ 1.2mm.
[0010] In one embodiment, the depth of the guide segment is C, where 0.35mm ≤ B ≤ 0.45mm.
[0011] In one embodiment, the circuit board has a plurality of insertion holes, which are spaced apart from each other.
[0012] This utility model also provides a connection structure, including:
[0013] The circuit board as described above; and
[0014] At least one electrical component is disposed near a first end face of the circuit board, and the pin of the electrical component is pressed into a socket.
[0015] This utility model also provides a motor controller, including the connection structure described above.
[0016] The circuit board provided by this invention improves the assembly yield of pin crimping by configuring the structure of the board's insertion holes as a guide section and a straight-through section connecting the guide section. Specifically, the guide section forms a guide opening on the first end face of the board, with its cross-sectional area gradually decreasing from the first end face to the second end face. This design guides the pins to be inserted into the insertion holes more accurately, reducing insertion deviations caused by inaccurate positioning. The straight-through section forms a fixing opening on the second end face of the board, allowing the pins to pass through the board and be fixed on the other side. This allows the pins to completely pass through the board, thereby improving the stability of crimping. In summary, the guide section facilitates accurate pin insertion, reduces insertion accuracy problems caused by uneven pressure distribution or insufficient positioning accuracy, reduces crimping failures, significantly reduces scrap, and saves production costs. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0018] Figure 1 A schematic diagram of the structure of a circuit board according to an embodiment of the present invention;
[0019] Figure 2 A schematic diagram of an embodiment of the connection structure provided by this utility model.
[0020] Explanation of icon numbers:
[0021] 100. Connection structure; 1. Circuit board; 11. Socket; 111. Guide section; 112. Straight-through section; 2. Electrical components.
[0022] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0024] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0025] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0026] This utility model proposes a circuit board 1.
[0027] Please see Figure 1In one embodiment of the present invention, the circuit board 1 has a first end face and a second end face disposed opposite to each other. The first end face of the circuit board 1 is provided with a plug hole 11 extending through to the second end face of the circuit board 1. The plug hole 11 extends to a through section 112 including a guide section 111 and a connecting section 112. The guide section 111 forms a guide opening for the plug hole 11 on the first end face of the circuit board 1. The cross-sectional area of the guide section 111 gradually decreases in the direction from the first end face to the second end face. The through section 112 forms a fixing opening for the plug hole 11 on the second end face of the circuit board 1.
[0028] The circuit board 1 provided by this utility model improves the assembly yield of pin crimping by configuring the structure of the insertion hole 11 of the circuit board 1 as a guide section 111 and a through section 112 connecting the guide section 111. Specifically, the guide section 111 forms a guide opening on the first end face of the circuit board 1, and its cross-sectional area gradually decreases from the first end face to the second end face. This design can guide the pin to be inserted into the insertion hole 11 more accurately, reducing insertion deviation caused by inaccurate positioning. The through section 112 forms a fixing opening on the second end face of the circuit board 1, allowing the pin to pass through the circuit board 1 and be fixed on the other side. This allows the pin to pass completely through the circuit board 1, thereby improving the stability of crimping. In summary, the guide section 111 helps to accurately insert the pin, reduces insertion accuracy problems caused by uneven pressure distribution or insufficient positioning accuracy, reduces crimping failures, and thus significantly reduces the generation of scrap and saves production costs.
[0029] It should be noted that "the cross-sectional area of the guide section 111 is gradually decreasing from the first end face to the second end face" means that the guide section 111 is a conical or flared structure or an irregular structure with one or more inclined surfaces that have a guiding function, so that its cross-sectional area gradually decreases from the first end face to the second end face. When one end of the pin enters the insertion hole 11, it can be guided by the inclined surface of the guide section 111 and inserted into the fixing hole more easily, thus improving the alignment effect.
[0030] In one embodiment, the guide section 111 has a horn-shaped structure, with its sidewalls inclined relative to the first end face of the circuit board 1 at an angle α, where 50° ≤ α ≤ 70°. A horn-shaped structure typically refers to a conical shape with a diameter at the bottom (larger end) larger than the diameter at the top. On both the upper and lower surfaces of the circuit board 1, this structure results in a larger opening at the upper end (first end face) and a smaller opening at the lower end (second end face). The angle α is limited to between 50° and 70°. This specific angle range ensures that the pins can be smoothly and accurately inserted into the socket 11, providing proper guidance and alignment during insertion.
[0031] Furthermore, in one embodiment, α = 60°. When α = 60°, the guide segment 111 can provide sufficient friction to prevent the pin from slipping during insertion, while not being too large to hinder insertion. Therefore, its alignment accuracy and fixation stability are optimal. This angle can provide sufficient guidance without causing excessive insertion force or damage to the pin.
[0032] The precise range of the aperture of the connector 11 helps improve insertion accuracy. If the aperture is too large, the pin may become loose in the connector 11, leading to poor contact. If the aperture is too small, the pin may be damaged or difficult to insert during insertion. In one embodiment, the aperture of the guide orifice is A, 1.45mm ≤ A ≤ 1.55mm. This aperture range of the guide orifice can accommodate pins within a certain size range (generally around 0.64mm), ensuring that the pin can be inserted smoothly. This range provides a certain tolerance to accommodate pin size fluctuations, which is especially important for mass production.
[0033] In one embodiment, the aperture of the fixing port is B, where 1mm ≤ B ≤ 1.2mm. The fixing port is the portion of the pin that the pin reaches after passing through the circuit board 1. Its smaller aperture (relative to the aperture A of the guide port) helps to secure the pin and prevent it from loosening or falling off during use. The aperture B of the fixing port is smaller than the aperture A of the guide port. This design ensures that the pin passes through the larger guide port first when passing through the circuit board 1, and is then firmly secured by the smaller fixing port. This stepped aperture design helps to achieve a better fixing effect.
[0034] The depth C of the guide segment 111 determines the distance the pin can be guided during insertion. This depth needs to be sufficient for the pin to smoothly enter the through segment 112, but not too long to avoid increasing unnecessary manufacturing difficulties. In one embodiment, the depth C of the guide segment 111 is 0.35mm ≤ B ≤ 0.45mm. Depth C helps improve the accuracy of pin insertion, ensuring that the pin can be correctly aligned and smoothly pass through the circuit board 1.
[0035] In one embodiment, the circuit board 1 has a plurality of insertion holes 11, which are spaced apart from each other. By spaced the insertion holes 11, the spatial layout on the circuit board 1 can be optimized, making the arrangement of various electronic components (such as IGBT modules) on the circuit board 1 more reasonable. This helps to improve the overall design efficiency and performance of the circuit board 1, and can prevent short circuits between adjacent pins during insertion, ensuring the stability and safety of the circuit.
[0036] Please see Figure 2This utility model also provides a connection structure 100, which includes at least one electrical component 2 and a circuit board 1. The specific structure of the circuit board 1 is as described in the above embodiments. Since this connection structure 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The electrical component 2 is disposed near the first end face of the circuit board 1, and the pin of the electrical component 2 is pressed into a connector hole.
[0037] This utility model also provides a motor controller, which includes a connection structure 100. The specific structure of the connection structure 100 is as described in the above embodiments. Since this motor controller adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.
[0038] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A circuit board, characterized in that, The circuit board has a first end face and a second end face that are disposed opposite to each other. The first end face of the circuit board has a plug hole that extends through to the second end face of the circuit board. The plug hole includes a guide section and a through section that connects to the guide section. The guide section forms a guide opening for the plug hole on the first end face of the circuit board. The cross-sectional area of the guide section gradually decreases in the direction from the first end face to the second end face. The through section forms a fixing opening for the plug hole on the second end face of the circuit board.
2. The circuit board as described in claim 1, characterized in that, The guide section has a horn structure, and the sidewall of the guide section is inclined relative to the first end face of the circuit board to form an angle α, wherein 50°≤α≤70°.
3. The circuit board as described in claim 2, characterized in that, α=60°。 4. The circuit board as described in claim 1, characterized in that, The diameter of the guide port is A, where 1.45mm ≤ A ≤ 1.55mm.
5. The circuit board as described in claim 1, characterized in that, The diameter of the fixing port is B, where 1mm ≤ B ≤ 1.2mm.
6. The circuit board as described in claim 1, characterized in that, The depth of the guide section is C, where 0.35mm ≤ B ≤ 0.45mm.
7. The circuit board as described in any one of claims 1 to 6, characterized in that, The circuit board has multiple insertion holes, which are spaced apart from each other.
8. A connection structure, characterized in that, include: The circuit board as described in any one of claims 1 to 7; and At least one electrical component is disposed near a first end face of the circuit board, and the pin of the electrical component is pressed into a socket.
9. A motor controller, characterized in that, Includes the connection structure as described in claim 8.