Convenient-to-weld circuit board for inflator

Abstract

The utility model discloses a convenient-to-weld circuit board for an inflator, which relates to the technical field of circuit boards and comprises a substrate provided with a plurality of positioning holes; the multiple clamping structures are all arranged on one face of the base plate, the multiple clamping structures are located on the outer sides of the multiple positioning holes respectively, each clamping structure comprises a positioning ring, an inner hole of each positioning ring is obliquely formed in the axial direction of the positioning ring, namely a corner anti-falling hole, and the corner anti-falling holes are in butt joint with the positioning holes; and pins of the components are sequentially inserted into the corresponding positioning holes and the corner anti-falling holes so as to realize bending of the pins. When the pins penetrate through the positioning holes, the pins can be automatically bent to a proper welding angle, manual bending of welding personnel is not needed, the phenomenon that the pins are excessively bent or broken due to improper force application is avoided, and meanwhile welding efficiency can be improved conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit boards, in particular to a circuit board for an inflator which is convenient for welding. Background Art

[0002] A printed circuit board (PCB for short) is a basic structure used to connect electronic components and is widely used in various electronic devices. Circuit boards are divided into single-sided boards, double-sided boards, and multi-layer boards. The circuit boards of inflators are usually used to control the various functions of the inflators. Their design and composition may vary according to the functions and needs of specific products. The commonly used materials and specifications of inflator circuit boards are similar to those of other electronic devices. The commonly used substrate material is FR-4. At the same time, in order to cope with heat and vibration, the circuit boards usually need to have a certain degree of durability. The circuit board design of the inflator needs to comprehensively consider the convenience and safety of the user to ensure that it works stably and reliably under various conditions of use.

[0003] The holes on the substrate of a circuit board for inserting pins are usually called "jacks" or "through holes". This hole allows the pins of electronic components to pass through the substrate of the circuit board and be soldered on the other side. After the pins pass through the jacks, in order to facilitate soldering of the pins, the pins need to be bent manually. Then the circuit board is flipped to ensure that the components will not fall and bring the pins out of the jacks. However, if the welder does not operate properly, the pins may occasionally bend excessively or break. Therefore, when bending the pins, you need to be careful and slow down, which will affect the soldering efficiency of the pins. Utility Model Content

[0004] The utility model aims to provide a circuit board for an inflator that is easy to weld, thereby solving the problem that in the existing circuit board welding, if the welder does not operate properly, the pins may be bent excessively or broken, so when bending the pins, it is necessary to be careful and slow down the speed, which affects the welding efficiency of the pins.

[0005] The utility model solves the above technical problems through the following technical solutions, and the utility model includes:

[0006] A substrate, wherein a plurality of positioning holes are formed on the substrate;

[0007] A plurality of clamping structures, each of which is arranged on one side of the substrate, and each of which is located outside a plurality of positioning holes, the clamping structure comprises a positioning ring, the inner hole of the positioning ring is arranged to be inclined along its axial direction, namely, a corner anti-falling hole, and the corner anti-falling hole is butted with the positioning hole;

[0008] A plurality of components, the pins of the components are sequentially inserted into corresponding positioning holes and corner anti-fall holes to achieve bending of the pins.

[0009] Preferably, a tin liquid pocket groove is provided on the end surface of the positioning ring, and the tin liquid pocket groove is communicated with the corner anti-fall hole.

[0010] Preferably, the corner anti-fall hole is provided with a filling portion connected to the tin liquid pocket to expand the contact area between the pin and the tin soldering liquid.

[0011] Preferably, the corner anti-fall hole is a tapered hole, and the side away from the base plate is a large diameter end, and a filling ring groove formed around the pin and the tapered hole is the filling portion.

[0012] Preferably, the filling portion is a filling groove connected to the anti-fall hole opened at the corner.

[0013] Preferably, the inclination angle of the corner anti-fall hole is 3°-7°.

[0014] Preferably, the outer diameter of the pin, the inner diameter of the positioning hole and the inner diameter of the corner anti-fall hole are adapted to each other.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The utility model provides a corner anti-fall hole connected to the positioning hole, so that the pin is pulled by the corner anti-fall hole to generate a certain degree of bending when passing through the positioning hole. When the pin passes through the positioning hole, it can be automatically bent to a suitable welding angle, and the welder does not need to bend it manually, avoiding the phenomenon of excessive bending or breakage of the pin caused by improper force, and at the same time it is convenient to improve the welding efficiency.

[0017] 2. The utility model provides a filling part, and when soldering, the soldering liquid can flow into the filling part by itself, thus achieving the effect of firmly connecting and fixing the positioning ring and the pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 for Figure 1 Bottom view of

[0020] Figure 3 It is a split cross-sectional view between the substrate and components in the utility model;

[0021] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 5 A schematic diagram of the cross-sectional structure of a pin inserted into a positioning hole;

[0023] Figure 6 It is a structural schematic diagram of the first filling part;

[0024] Figure 7 is a schematic diagram of the structure of the second filling part;

[0025] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure in the BB direction.

[0026] The numbers in the figure represent:

[0027] 1. Base plate; 2. Positioning hole; 3. Clamping structure; 31. Positioning ring; 32. Corner anti-fall hole; 33. Tin liquid pocket; 34. Filling ring groove; 35. Filling groove; 4. Components; 5. Pins. DETAILED DESCRIPTION

[0028] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0029] Embodiment 1

[0030] This embodiment provides a technical solution: a circuit board for an inflator that is easy to weld, such as Figure 1-5 As shown, it includes a substrate 1 and a plurality of clamping structures 3. A plurality of positioning holes 2 are opened on the substrate 1. The number of the clamping structures 3 and the positioning holes 2 is the same, and each clamping structure 3 is respectively installed at the corresponding position of the hole opening of a positioning hole 2. A plurality of components 4 are arranged above the substrate 1. The plurality of components 4 have a corresponding number of pins 5. The number of pins 5 on each component 4 is determined according to the different types and sizes of the components 4, and the size of the pins 5 on each component 4 is consistent and adapted to the size of the positioning hole 2.

[0031] Multiple clamping structures 3 are arranged on one side of the substrate 1. The clamping structures 3 are used to help position the pins 5 of the components 4 to prevent the pins 5 from loosening when the substrate 1 is flipped over with the pins 5 facing upward. The welder does not need to press and support manually during welding, which improves the convenience and reliability of welding and realizes automatic positioning.

[0032] The clamping structure 3 includes a positioning ring 31, the inner hole of the positioning ring 31 is inclined along its axial direction, that is, a corner anti-fall hole 32, and the corner anti-fall hole 32 is connected to the positioning hole 2, and the inclination angle of the corner anti-fall hole 32 is 3°-7°; the outer diameter of the pin 5, the inner diameter of the positioning hole 2 and the inner diameter of the corner anti-fall hole 32 are adapted to ensure the stability of the pin 5; after the pin 5 passes through the inclined corner anti-fall hole 32, it will be folded at a certain angle, thereby achieving clamping to prevent the pin 5 from loosening.

[0033] Furthermore, a certain curvature is set at the position where the corner anti-fall hole 32 and the positioning hole 2 are connected. When one end of the pin 5 enters the corner anti-fall hole 32 along the smooth curvature, the pin 5 will not be broken, which helps the pin 5 to enter the corner anti-fall hole 32 from the positioning hole 2 more smoothly and quickly.

[0034] Furthermore, a tin liquid pocket 33 is provided on the end face of the positioning ring 31, and the tin liquid pocket 33 is connected to the corner anti-fall hole 32. The position where the tin liquid pocket 33 and the corner anti-fall hole 32 are connected forms a drainage position, so that the tin liquid used during welding is gathered and pocketed into the tin liquid pocket 33, preventing some excess tin liquid from flowing freely on the substrate 1.

[0035] When in use, the pin 5 of the component 4 is inserted into the positioning hole 2 of the installation position, and the pin 5 is pressed so that one end of the pin 5 passes through the positioning hole 2 and the corner anti-fall hole 32 in sequence, until the component 4 is pressed to fit the surface of the substrate 1. Under the traction of the corner anti-fall hole 32, the pin 5 will be bent to a certain extent. When the substrate 1 is turned over so that the pin 5 faces upward and the component 4 faces downward, the component 4 is firmly hung on the substrate 1 through the angle generated by the pin 5, and the pin 5 can be automatically bent to a suitable position when passing through the positioning hole 2. The welding angle does not require manual bending by the welder, which avoids excessive bending or breakage of the pin 5 caused by improper force. At the same time, it is convenient to improve the welding efficiency. The tin liquid used for welding is applied to the connection position of the pin 5 and the edge of the corner anti-fall hole 32. After the tin liquid solidifies, the pin 5 is fixed to complete the welding work between the component 4 and the substrate 1. If some tin liquid flows around, it will be caught by the tin liquid pocket 33 to prevent the tin liquid from flowing and affecting the aesthetics of the welding point. Finally, the pin 5 extending with excess tin liquid can be cut off.

[0036] Embodiment 2

[0037] This embodiment is further optimized on the basis of the first embodiment, and the same parts as the above technical solution will not be repeated here. Figure 6-Figure 8 As shown, in order to better realize the utility model, the following setting method is particularly adopted: in this embodiment, in order to increase the stability of the connection between the pin 5 and the positioning ring 31, the corner anti-fall hole 32 is provided with a filling part connected to the tin liquid pocket 33 to expand the contact area between the pin 5 and the tin soldering liquid.

[0038] like Figure 6 As shown, in an optional embodiment, the corner anti-fall hole 32 is a tapered hole, and the side away from the substrate 1 is a large diameter end, that is, the inner diameter of the corner anti-fall hole 32 away from the substrate 1 gradually increases. After the pin 5 is inserted into the corner anti-fall hole 32, a filling ring groove 34 is formed around the pin 5 and the tapered hole, which is the filling part. During welding, the tin liquid will flow into the filling part, thereby realizing a secure connection and fixation between the positioning ring 31 and the pin 5.

[0039] like Figure 7 and Figure 8 As shown, in an optional embodiment, the filling portion is a filling groove 35 connected to the corner anti-fall hole 32. The number of the filling grooves 35 can be multiple and evenly distributed. During welding, the tin liquid will flow into the filling groove 35, thereby achieving a secure connection and fixation between the positioning ring 31 and the pin 5.

[0040] The above are only preferred embodiments of the present invention, which are only illustrative and not restrictive. Those skilled in the art understand that many changes, modifications, and even equivalences may be made to the present invention within the spirit and scope defined by the claims of the present invention, but they will all fall within the scope of protection of the present invention.

Claims

1. A circuit board for an inflator that is easy to weld, characterized in that: include: A substrate (1), wherein a plurality of positioning holes (2) are formed on the substrate (1); A plurality of clamping structures (3), wherein the plurality of clamping structures (3) are all arranged on one side of the substrate (1), and the plurality of clamping structures (3) are respectively located outside the plurality of positioning holes (2), the clamping structures (3) comprising a positioning ring (31), the inner hole of the positioning ring (31) being arranged to be inclined along its axial direction, namely, a corner anti-falling hole (32), and the corner anti-falling hole (32) is butted with the positioning hole (2); A plurality of components (4), wherein pins (5) of the components (4) are sequentially inserted into corresponding positioning holes (2) and corner anti-fall holes (32) to achieve bending of the pins (5).

2. The inflator circuit board that is easy to weld as claimed in claim 1, characterized in that: A tin liquid pocket groove (33) is provided on the end surface of the positioning ring (31), and the tin liquid pocket groove (33) is communicated with the corner anti-falling hole (32).

3. The inflator circuit board that is easy to weld as claimed in claim 2, characterized in that: The corner anti-falling hole (32) is provided with a filling portion connected to the tin liquid pocket groove (33) to expand the contact area between the pin (5) and the tin soldering liquid.

4. The inflator circuit board that is easy to weld as claimed in claim 3, characterized in that: The corner anti-fall hole (32) is a tapered hole, and the side away from the base plate (1) is a large diameter end. A filling ring groove (34) formed around the pin (5) and the tapered hole is the filling portion.

5. The inflator circuit board that is easy to weld as claimed in claim 3, characterized in that: The filling portion is a filling groove (35) connected to the anti-falling hole (32) opened at the corner.

6. The inflator circuit board that is easy to weld as claimed in claim 1, characterized in that: The inclination angle of the corner anti-falling hole (32) is 3°-7°.

7. The inflator circuit board that is easy to weld as claimed in claim 1, characterized in that: The outer diameter of the pin (5), the inner diameter of the positioning hole (2) and the inner diameter of the corner anti-fall hole (32) are adapted to each other.

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