CN220965248U - Circuit board fixing screw with accurate positioning function - Google Patents
Circuit board fixing screw with accurate positioning function Download PDFInfo
- Publication number
- CN220965248U CN220965248U CN202322201840.1U CN202322201840U CN220965248U CN 220965248 U CN220965248 U CN 220965248U CN 202322201840 U CN202322201840 U CN 202322201840U CN 220965248 U CN220965248 U CN 220965248U
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- 238000011161 development Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
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- Mounting Of Printed Circuit Boards And The Like (AREA)
Abstract
The utility model discloses a circuit board fixing screw with an accurate positioning function, which comprises a positioning screw body, wherein the positioning screw body is used for accurately positioning and fixing a circuit board on a shell, the positioning screw body comprises a screw head, a positioning conical surface and a screw rod, the positioning conical surface is connected with the screw head and the screw rod, the diameter of the large end of the positioning conical surface is the same as the diameter of the large diameter of a screw thread of the screw rod, and the diameter of the small end of the positioning conical surface is the same as the diameter of the small diameter of the screw thread of the screw rod. When the positioning screw body is used for installing a circuit board, the positioning conical surface is matched with the circuit board installing hole, so that the circuit board installing hole is coaxial with the threaded hole on the shell, assembly deviation during assembly of the circuit board is eliminated, accurate positioning of an output terminal on the circuit board of the switching power supply is realized, positioning accuracy of the positioning screw body is higher than that of a tool, the positioning screw body can be applied to different occasions, and the positioning screw is simple in structure, convenient to process and low in cost.
Description
Technical Field
The utility model relates to the field of circuit board assembly, in particular to a circuit board fixing screw with an accurate positioning function.
Background
The circuit board is a support body of the electronic components and is a carrier for the electrical connection of the electronic components. It is known as a "printed" circuit board because it is being made by electronic printing. Circuit boards have evolved from single to double, multi and flexible, and still maintain their respective trends. The printed board still maintains strong vitality in the development process of future electronic equipment due to the continuous development to the high precision, high density and high reliability, the continuous reduction of volume, the reduction of cost and the improvement of performance. The design process flow of the circuit board comprises schematic diagram design, electronic component database login, design preparation, block division, electronic component configuration, configuration confirmation, wiring and final inspection.
The switching power supply is a component of the communication device system for supplying power to the motherboard, and the output terminals of the switching power supply need to be plugged into terminals on the motherboard. After the switch power supply is installed, the output terminal faces upwards, the opposite-plug terminal on the main board faces downwards, and the opposite-plug process of the two terminals is blind-plug. In this case, if the position of the output terminal of the switching power supply is inaccurate, the output terminal of the switching power supply and the opposite terminal on the main board are damaged, and thus, the position of the output terminal of the switching power supply is required to be accurate. Because the output terminal of the switching power supply is positioned on the circuit board, the circuit board is required to be accurately positioned during assembly, and the position accuracy of the output terminal of the switching power supply is ensured by eliminating the assembly deviation of the circuit board.
Currently, a tooling is generally used for positioning a circuit board, and the position deviation of an output terminal of a switching power supply is large due to manufacturing deviation of the tooling and deviation of a positioning reference during use. Meanwhile, the cost of locating by adopting the tool is high.
Disclosure of utility model
In order to solve the problem that the prior art generally uses a tool to position a circuit board, and the position deviation of an output terminal of a switching power supply is large due to the manufacturing deviation of the tool and the deviation of a positioning reference during use, the utility model provides a circuit board fixing screw with an accurate positioning function.
The technical scheme of the utility model is as follows:
A circuit board fixing screw with accurate positioning function is characterized by comprising a positioning screw body which is used for accurately positioning and fixing a circuit board on a shell,
The positioning screw body comprises a screw head, a positioning conical surface and a screw rod, wherein the positioning conical surface is connected with the screw head and the screw rod, the diameter of the large end of the positioning conical surface is the same as the large diameter of the screw thread of the screw rod, and the diameter of the small end of the positioning conical surface is the same as the small diameter of the screw thread of the screw rod.
The utility model according to the scheme is characterized in that a circuit board mounting hole is formed in the circuit board, a threaded hole is formed in the shell, and the positioning screw body penetrates through the circuit board mounting hole and is in threaded connection with the threaded hole in the shell.
The utility model according to the above-mentioned aspect is characterized in that the circuit board mounting holes are provided on the peripheral edges of the circuit board.
The utility model according to the above scheme is characterized in that the central axes of the circuit board mounting hole, the threaded hole and the positioning conical surface are all on the same axis.
The utility model according to the above-mentioned aspect is characterized in that the diameter of the screw head is larger than the diameter of the circuit board mounting hole, and the diameter of the circuit board mounting hole is the same as the diameter of the large end of the positioning cone.
Further, the screw is provided with a tangential plane parallel to the central axis of the positioning conical surface on the screw thread.
Further, the length of the locating conical surface is the same as the thickness of the circuit board.
Further, the screw head of the positioning screw body is provided with a straight groove, a cross groove or an eleven groove.
Further, an output terminal is fixed in the middle of the circuit board.
According to the scheme, when the locating screw body is used for installing the circuit board, the locating conical surface is matched with the circuit board installing hole, so that the circuit board installing hole is coaxial with the threaded hole on the shell, assembly deviation in assembly of the circuit board is eliminated, and accurate locating of the output terminal on the circuit board of the switch power supply is achieved. The positioning screw body is a part with an accurate positioning function, has higher positioning precision than a tool, can be applied to different occasions, and has the advantages of simple structure, convenience in processing and low cost.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is a schematic diagram of the application of the present utility model.
In the drawings, the respective reference numerals are as follows:
1. a set screw body; 11. a screw head; 12. positioning a conical surface; 13. a screw;
2. A circuit board; 21. a circuit board mounting hole; 22. an output terminal;
3. A housing; 31. and (3) a threaded hole.
Detailed Description
For a better understanding of the objects, technical solutions and technical effects of the present utility model, the present utility model will be further explained below with reference to the drawings and examples. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, it is stated that the embodiments described below are only for explaining the present utility model and are not intended to limit the present utility model.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present, and when an element is referred to as being "connected" to the other element, it may be directly connected to the other element or intervening elements may also be present.
The direction or position relationship is based on the direction or position relationship shown in the drawings, or the direction or position relationship which is commonly put when the application product is used, or the direction or position relationship which is commonly understood by those skilled in the art, or the direction or position relationship which is commonly put when the application product is used, only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the device or element in question must have a specific direction, be configured and operated in a specific direction, and therefore should not be construed as limiting the application.
The terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features.
The meaning of "a plurality of" is two or more, unless specifically defined otherwise.
As shown in fig. 1-2, a circuit board fixing screw with accurate positioning function comprises a positioning screw body 1, wherein the positioning screw body 1 is used for accurately positioning and fixing a circuit board 2 on a housing 3, a circuit board mounting hole 21 is formed in the circuit board 2, a threaded hole 31 is formed in the housing 3, the positioning screw body 1 passes through the circuit board mounting hole 21 and is in threaded connection with the threaded hole 31, the positioning screw body 1 comprises a screw head 11, a positioning conical surface 12 and a screw rod 13, the positioning conical surface 12 is connected with the screw head 11 and the screw rod 13, and central axes of the circuit board mounting hole 21, the threaded hole 31 and the positioning conical surface 12 are all on the same axis.
When the locating screw body 1 is used for installing the circuit board 2, the locating conical surface 12 is matched with the circuit board installation hole 21, so that the circuit board installation hole 21 and the threaded hole 31 on the shell are coaxial, assembly deviation during circuit board assembly is eliminated, and accurate locating of an output terminal on the circuit board of the switching power supply is realized.
The utility model is a part with accurate positioning function, the positioning precision is higher than that of a tool, the utility model can be applied to different occasions, and has the advantages of simple structure, convenient processing and low cost.
In the present embodiment, the diameter of the large end of the positioning tapered surface 12 is the same as the diameter of the circuit board mounting hole 21, and the diameter of the small end of the positioning tapered surface 12 is the same as the minor diameter of the screw 13. The length of the positioning cone 12 is the same as the thickness of the circuit board 2. An output terminal 22 is fixed to the middle of the circuit board 2. The screw 13 is provided with a tangential plane parallel to the central axis of the positioning cone 12 on the screw thread.
In an alternative embodiment, the screw head of the set screw body 1 is provided with a "straight slot". In other alternative embodiments, the screw head of the set screw body 1 is provided with a "cross-shaped slot". In other alternative embodiments, the screw head of the set screw body 1 is provided with an "eleven slot". The user can select a proper groove according to actual conditions. The screw head of the setscrew body 1 may be cylindrical or semi-circular or button-shaped in shape.
Specifically, the minor diameter of the screw 13 is a circle of the smallest diameter of the orthographic projection of the screw 13, and the major diameter of the screw 13 is a circle of the largest diameter of the orthographic projection of the screw 13.
Specifically, a positioning screw body 1 is provided with a section of positioning conical surface 12 between a screw head 11 and a screw rod 13, wherein the diameter of the large end of the positioning conical surface 12 is equal to that of a circuit board mounting hole 21, the diameter of the small end of the positioning conical surface 12 is equal to that of the screw thread of the screw rod 13, the length of the positioning conical surface 12 is equal to that of the circuit board thickness, and the conical section and the screw rod are coaxial.
When the positioning screw body 1 is used for fixing the circuit board 2, the positioning conical surface 12 is matched with the circuit board mounting hole 21, so that the circuit board mounting hole 21 and the threaded hole 31 on the shell 3 are coaxial, assembly deviation during assembly of the circuit board 2 is eliminated, and accurate positioning of the output terminal 22 on the circuit board 2 of the switching power supply is realized.
The working principle is as follows: when the positioning screw body 1 is used for fixing the circuit board 2, the positioning conical surface 12 of the positioning screw body 1 is matched with the circuit board mounting hole 21 to drive the circuit board 2 to move in a small range, so that the circuit board mounting hole 21 and the positioning conical surface 12 of the positioning screw body 1 tend to be coaxial, after the positioning screw body 1 is locked, a gap is not reserved between the positioning conical surface 12 and the circuit board mounting hole 21, so that the circuit board mounting hole 21 and the positioning conical surface 12 of the positioning screw body 1 are coaxial, and the positioning conical surface 12 of the positioning screw body 1 and the screw 13 of the positioning screw body 1 are coaxial, so that the circuit board mounting hole 21 and the screw 13 of the positioning screw body 1 are coaxial.
The shaft 13 of the set screw body 1 is coaxial with the threaded hole 31 of the housing 3 due to the engagement of the shaft 13 of the set screw body 1 with the threaded hole 31 of the housing 3.
Therefore, after the positioning screw body 1 is locked, the circuit board mounting hole 21 and the threaded hole 31 on the housing 3 are coaxial, so that assembly deviation when the circuit board 2 is fixed is eliminated, and the accurate positioning of the output terminal on the switching power supply circuit board is realized.
When assembling, the circuit board (assembly) is put into the shell 3, and the circuit board 2 is locked by the set screw body 1. Since the positioning screw body 1 has an accurate positioning function, the circuit board mounting hole 21 and the threaded hole 31 on the housing 3 are coaxial, and assembly deviation in the fixing process of the circuit board 2 is eliminated, so that the accurate positioning of the output terminal on the switching power supply circuit board is realized.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (9)
1. A circuit board fixing screw with accurate positioning function comprises a positioning screw body for accurately positioning and fixing a circuit board on a shell, and is characterized in that,
The positioning screw body comprises a screw head, a positioning conical surface and a screw rod, wherein the positioning conical surface is connected with the screw head and the screw rod, the diameter of the large end of the positioning conical surface is the same as the large diameter of the screw thread of the screw rod, and the diameter of the small end of the positioning conical surface is the same as the small diameter of the screw thread of the screw rod.
2. The circuit board fixing screw with the accurate positioning function according to claim 1, wherein a circuit board mounting hole is formed in the circuit board, a threaded hole is formed in the housing, and the positioning screw body is in threaded connection with the threaded hole in the housing through the circuit board mounting hole.
3. The circuit board fixing screw with accurate positioning function according to claim 2, wherein the circuit board mounting holes are provided on the peripheral edge of the circuit board.
4. The circuit board fixing screw with accurate positioning function according to claim 2, wherein the circuit board mounting hole, the threaded hole of the housing and the central axis of the positioning cone are all on the same axis.
5. The circuit board fixing screw with accurate positioning function according to claim 2, wherein the diameter of the screw head is larger than the diameter of the circuit board mounting hole, and the diameter of the circuit board mounting hole is the same as the diameter of the large end of the positioning cone.
6. The circuit board fixing screw with accurate positioning function according to claim 1, wherein the screw is provided with a tangential plane parallel to the central axis of the positioning cone on the screw thread.
7. The circuit board fixing screw with accurate positioning function according to claim 1, wherein the length of the positioning conical surface is the same as the thickness of the circuit board.
8. The circuit board fixing screw with accurate positioning function according to claim 1, wherein the screw head of the positioning screw body is provided with a "straight slot" or a "cross slot" or an "eleven slot".
9. The circuit board fixing screw with accurate positioning function according to claim 1, wherein the output terminal is fixed to the middle part of the circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322201840.1U CN220965248U (en) | 2023-08-15 | 2023-08-15 | Circuit board fixing screw with accurate positioning function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322201840.1U CN220965248U (en) | 2023-08-15 | 2023-08-15 | Circuit board fixing screw with accurate positioning function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220965248U true CN220965248U (en) | 2024-05-14 |
Family
ID=90972872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322201840.1U Active CN220965248U (en) | 2023-08-15 | 2023-08-15 | Circuit board fixing screw with accurate positioning function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220965248U (en) |
-
2023
- 2023-08-15 CN CN202322201840.1U patent/CN220965248U/en active Active
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