CN215070492U - Electrical connection structure of similar clip structure - Google Patents
Electrical connection structure of similar clip structure Download PDFInfo
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- CN215070492U CN215070492U CN202121229948.6U CN202121229948U CN215070492U CN 215070492 U CN215070492 U CN 215070492U CN 202121229948 U CN202121229948 U CN 202121229948U CN 215070492 U CN215070492 U CN 215070492U
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Abstract
The utility model relates to an electrical connection structure of a clip-like structure, which is used for detachably connecting a chassis with a grounding end of a PCB in the chassis, the chassis is protected and grounded, the electrical connection structure comprises a copper column and a connecting screw, one end of the copper column is locked on the grounding end of the PCB, and the other end of the copper column is arranged towards the chassis and is provided with a threaded hole; the novel cabinet is characterized in that a similar clip structure is arranged at a position, corresponding to the copper column, on the cabinet, the similar clip structure is provided with a central elastic arm, a screw mounting hole is formed in the central elastic arm, and the connecting screw penetrates through the screw mounting hole and is connected with a threaded hole of the copper column. The utility model discloses it is easy and simple to handle, it is reversible with the disconnection to connect, can ensure electrical connection's reliability, can effectively protect PCB again.
Description
Technical Field
The utility model relates to an electrical safety protection technical field, concretely relates to electrical connection structure of similar clip structure.
Background
Some electrical products need to carry out alternating current-direct current conversion on electric energy in the working process, and main power conversion devices for completing the function are all designed by semiconductors. Sudden changes such as surge current of a power grid where the equipment is located can damage devices of the electrical products to a certain extent, and therefore the whole equipment is damaged. Meanwhile, a certain circuit protection process is required for the conversion circuit under the requirements of the mandatory standards such as EMC and EMI, and these protection circuits usually need to realize ground protection to achieve leakage current generated in the protection process to the protection ground. This is a common application, but also a protected ground does not allow leakage current leakage, which requires a switching device to reliably cut off the leakage current generated by the circuit protection.
The practice of the existing frequency converter industry is as follows: (1) the user cannot easily disconnect the ground connection; (2) a wire or sheet metal part is used for grounding connection of the protection circuit, and the grounding connection is disconnected by cutting the connection; (3) a detachable sheet metal part is used for realizing connection and disconnection removal through a screw. The three methods have the problems of inconvenient operation or irreversible connection, which is not beneficial to the long-term use of the electric product.
Among the three methods, the method (1) has the problem of inconvenient operation, the method (2) has the problem of irreversible connection and disconnection, and the method (3) has the problems that the conductive sheet metal part is connected to a connection point of the PCB through a screw, and the PCB pin is subjected to great stress and is easy to damage in a vibration environment.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the technical problem who exists among the prior art, provide an electrical connection structure of type paper clip structure, its is easy and simple to handle, and the disconnection is reversible, can ensure electrical connection's reliability, can effectively protect PCB again.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
an electrical connection structure of a paper clip-like structure is used for detachably connecting a chassis with a grounding end of a PCB in the chassis, the chassis is protected and grounded, the electrical connection structure comprises a copper column and a connection screw, one end of the copper column is locked on the grounding end of the PCB, and the other end of the copper column faces the chassis and is provided with a threaded hole; the novel cabinet is characterized in that a similar clip structure is arranged at a position, corresponding to the copper column, on the cabinet, the similar clip structure is provided with a central elastic arm, a screw mounting hole is formed in the central elastic arm, and the connecting screw penetrates through the screw mounting hole and is connected with a threaded hole of the copper column.
The utility model has the advantages that: in the non-connection state, a certain gap is left between the copper column of the PCB and the case, the gap is at least larger than the minimum electrical gap specified by the safety specification, and at the moment, the grounding end of the PCB is disconnected with the protective grounding of the case. The central elastic arm of the similar clip structure on the case is connected to the copper column by the connecting screw in a pressing way, so that the grounding of the PCB grounding end is protected. In the connected state, the central elastic arm of the paper clip-like structure has certain deformation. After the connecting screw is detached, the central elastic arm of the paper clip-like structure restores to the original state before deformation, and is disconnected from the copper column, so that the protection grounding of the PCB is cut off. This electrical connection structure is easy and simple to handle, can be many times repeated connect and the disconnection, and the connection disconnection is reversible, and because the central elastic arm of force has elasticity, perfectly solved because manufacturing and assembly tolerance, when copper post and quick-witted case are fixed with the screw for the sheet metal component, the PCB pin receives very big stress, problem damaged easily under the vibrations environment, can ensure electrical connection's reliability, can effectively protect PCB again.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Preferably, the paper clip-like structure is formed by arranging a first U-shaped through hole on the chassis, a central concave position of the first U-shaped through hole is a central elastic arm, the screw mounting hole is formed in the central elastic arm, when the connecting screw is mounted in place, the central elastic arm deforms and is attached to the end of the copper column, and after the connecting screw is dismounted, the central elastic arm resets and leaves the copper column.
The beneficial effect of adopting the above preferred scheme is: first U-shaped through-hole cuts out the central elastic arm on the sheet metal component of quick-witted case, and the central elastic arm both has the electric conductivity of metal, has certain elasticity again, when carrying out electrical connection through connecting screw with central elastic arm crimping to the copper post, because its elasticity, it takes place deformation and cushions, can kick-back again after the disconnection and reset, has both guaranteed electrical connection's validity, has guaranteed the security of electrical disconnection again. Because the central elastic arm has elasticity, the damping can be provided for the PCB pin, and the damage to the PCB in a vibration environment is reduced.
Preferably, a second U-shaped through hole is further arranged outside the first U-shaped through hole, the U-shaped open end of the first U-shaped through hole is oppositely inserted into the U-shaped open end of the second U-shaped through hole, and the first U-shaped through hole is not communicated with the second U-shaped through hole; an outer elastic arm is arranged between the first U-shaped through hole and the second U-shaped through hole, the end part of the outer elastic arm is connected with the end part of the central elastic arm, and the outer elastic arm and the central elastic arm are arranged in a zigzag winding manner.
The beneficial effect of adopting the above preferred scheme is: the outer elastic arm provides support for the central elastic arm, and the outer elastic arm is superposed with the central elastic arm, so that the elasticity of the chassis sheet metal part is increased, and the stroke range of the connecting screw is enlarged. In order to further guarantee the effectiveness of the electrical connection disconnection, on the basis of increasing the stroke range of the connecting screw, the length of the copper column can be properly shortened so as to increase the electrical clearance between the PCB and the chassis sheet metal part.
Preferably, the width dimension of the outer elastic arm is smaller than that of the central elastic arm.
The beneficial effect of adopting the above preferred scheme is: on the basis of ensuring the rigidity of the paper clip-like structure, the width size of the outer elastic arm can be reduced as much as possible to increase the elasticity of the paper clip-like structure. Because the width dimension of the central elastic arm is limited by the bolt mounting hole, the width dimension of the outer elastic arm can be smaller than that of the central elastic arm.
Preferably, the central elastic arm is provided with at least two thread mounting holes, and each thread mounting hole is correspondingly provided with a connecting screw; the PCB is provided with at least two copper columns, and the threaded mounting holes and the connecting screws are in one-to-one correspondence with the copper columns.
The beneficial effect of adopting the above preferred scheme is: when a plurality of grounding points on the PCB need to be grounded respectively due to functional requirements, when the copper rail of the PCB is designed, a plurality of protection grounding points on the PCB are led to the central elastic arm through the copper rail, a copper column is installed on each protection grounding point, and the protection grounding of the PCB can be completed by adopting a mode that the copper columns, the threaded mounting holes and the connecting screws are connected in a one-to-one correspondence manner. A combination of one or more ground point connections may also be made according to actual requirements.
Preferably, the width dimension of the central elastic arm between the adjacent thread mounting holes is smaller than the width dimension of the two ends of the central elastic arm.
The beneficial effect of adopting the above preferred scheme is: the width size of the central elastic arm between the adjacent thread mounting holes is reduced to increase the elasticity of the central elastic arm between the adjacent thread mounting holes, so that the linkage amplitude between the adjacent grounding points is reduced, and the accidental connection of the grounding points which do not need to be connected is avoided.
Drawings
FIG. 1 is an external view of the utility model;
FIG. 2 is an enlarged view of part A of FIG. 1 according to the present invention;
FIG. 3 is a cross-sectional view of the utility model;
FIG. 4 is an enlarged view of the portion B of FIG. 3 according to the present invention;
fig. 5 is a side comparison view of the present invention before and after electrical connection.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the novel cabinet comprises a cabinet, a similar clip structure 2, a central elastic arm 201, a central elastic arm 202, an outer elastic arm 3, a PCB 4, a copper column 5, a connecting screw 5, a first U-shaped through hole, b and a second U-shaped through hole.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1 to 5, the present embodiment provides an electrical connection structure similar to a clip structure, which is suitable for a frequency converter and other automation equipment, and is used for detachably connecting a chassis 1 of the equipment and a ground terminal of a PCB3 in the chassis 1, where the chassis 1 is protected and grounded. The electrical connection structure comprises a copper column 4 and a connection screw 5, one end of the copper column 4 is locked on the grounding end of the PCB3, and the other end of the copper column 4 is arranged towards the case 1 and is provided with a threaded hole; the position of the case 1 corresponding to the copper column 4 is provided with a paper clip-like structure 2, the paper clip-like structure 2 is provided with a central elastic arm 201, the central elastic arm 201 is provided with a screw mounting hole, and the connecting screw 5 penetrates through the screw mounting hole and is connected with a threaded hole of the copper column 4.
In the non-ground protection connection state, a certain gap is left between the copper column 4 of the PCB3 and the case 1, the gap is at least larger than the minimum electrical gap specified by the safety specification, and at this time, the ground terminal of the PCB3 is disconnected from the protection ground of the case 1. The central elastic arm 201 of the clip-like structure 2 on the chassis 1 is pressed on the copper column 4 by the connecting screw 5, and the grounding of the grounding end of the PCB3 is completed. In the connected state, the central elastic arm 201 of the clip-like structure 2 has a certain deformation. After the connecting screw 5 is removed, the central elastic arm 201 of the clip-like structure 2 is restored to the state before deformation, and is disconnected from the copper column 4, so that the protection grounding of the PCB3 is cut off. This electrical connection structure is easy and simple to handle, can be many times repeated connect and break off, and the disconnection is reversible, and because central elastic arm 201 has elasticity, perfectly solved because manufacturing and assembly tolerance, when copper post 4 and quick-witted case 1 sheet metal component are fixed with the screw, PCB3 pin receives very big stress, the easy problem of damaging under the vibrations environment, can ensure electrical connection's reliability, can effectively protect PCB3 again.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
As shown in fig. 2, the paper clip-like structure 2 is formed by forming a first U-shaped through hole a on the chassis 1, a central recessed position of the first U-shaped through hole a is a central elastic arm 201, the screw mounting hole is formed in the central elastic arm 201, when the connection screw 5 is mounted in place, the central elastic arm 201 deforms and is attached to the end of the copper column 4, and after the connection screw 5 is detached, the central elastic arm 201 resets and leaves the copper column 4.
The first U-shaped through hole a cuts a central elastic arm 201 on the sheet metal part of the chassis 1, and the central elastic arm 201 has both metal conductivity and certain elasticity. As shown in a comparison diagram of fig. 5 before and after electrical connection, when the central elastic arm 201 is pressed on the copper post 4 by the connecting screw 5 for electrical connection, the central elastic arm is deformed to buffer due to its elasticity, and can rebound to reset after disconnection, which not only ensures the effectiveness of electrical connection, but also ensures the safety of electrical disconnection. Because the central elastic arm 201 has elasticity, the pin of the PCB3 can be damped, and the damage to the PCB3 in a vibration environment is reduced.
As shown in fig. 2, as a further improvement, a second U-shaped through hole b is further disposed outside the first U-shaped through hole a, the U-shaped open end of the first U-shaped through hole a is inserted into the U-shaped open end of the second U-shaped through hole b in an opposite manner, and the first U-shaped through hole a is not communicated with the second U-shaped through hole b; an outer elastic arm 202 is arranged between the first U-shaped through hole a and the second U-shaped through hole b, the end part of the outer elastic arm 202 is connected with the end part of the central elastic arm 201, and the outer elastic arm 202 and the central elastic arm 201 are arranged in a zigzag winding manner.
The outer elastic arm 202 provides support for the central elastic arm 201, the outer elastic arm 202 is overlapped with the central elastic arm 201, the elasticity of the sheet metal part of the case 1 is increased, and the stroke range of the connecting screw 5 is enlarged. In order to further guarantee the effectiveness of the electrical connection disconnection, on the basis of increasing the stroke range of the connecting screw 5, the length of the copper column 4 can be appropriately shortened so as to increase the electrical clearance between the PCB3 and the sheet metal part of the case 1.
As shown in fig. 2, the width dimension of the outer resilient arm 202 is smaller than the width dimension of the central resilient arm 201.
On the basis of ensuring the rigidity of the paper clip-like structure 2, the width of the outer elastic arm 202 can be reduced as much as possible to increase the elasticity. Since the width of the central elastic arm 201 is limited by the screw mounting hole, the width of the outer elastic arm 202 is smaller than the width of the central elastic arm 201.
As shown in fig. 4, at least two threaded mounting holes are formed in the central elastic arm 201, and each threaded mounting hole is correspondingly provided with a connecting screw 5; at least two copper columns 4 are arranged on the PCB3, and the threaded mounting holes and the connecting screws 5 are in one-to-one correspondence with the copper columns 4.
When a plurality of grounding points on the PCB3 need to be grounded respectively due to functional requirements, when the copper rail of the PCB3 is designed, a plurality of protection grounding points on the PCB3 are led to the central elastic arm 201 through the copper rail, a copper column 4 is installed on each protection grounding point, and the PCB3 can be grounded in a one-to-one corresponding manner by adopting the copper columns 4, the threaded mounting holes and the connecting screws 5. A combination of one or more ground point connections may also be made according to actual requirements.
As shown in fig. 2, the width dimension of the central elastic arm 201 between adjacent threaded mounting holes is smaller than the width dimension of both ends of the central elastic arm 201.
The width size of the central elastic arm 201 between the adjacent thread mounting holes is reduced to increase the elasticity of the central elastic arm 201 between the adjacent thread mounting holes, so that the linkage amplitude between the adjacent grounding points is reduced, and the accidental connection of the grounding points which do not need to be connected is avoided.
The working principle is as follows:
the chassis 1 of the whole equipment of the embodiment is a sheet metal part, and is connected to the ground to introduce leakage current into the ground, so that grounding protection is provided for the equipment. The copper posts 4 on the PCB3 serve as extensions to the protected ground points on the PCB3, which when in conductive communication with the chassis 1, provide ground protection for the electrical components on the PCB 3. In this embodiment, a clip-like elastic structure is designed on the chassis 1, and has good elasticity, and the portion (i.e., the central elastic arm 201) with larger elasticity of the clip-like structure 2 is crimped to the copper pillar 4 by the connecting screw 5 to electrically connect the clip-like elastic structure to realize the ground protection of the device. After the connecting screw 5 is detached, the central elastic arm 201 is rebounded and reset due to the resilience force of the paper clip-like structure 2, and the connection between the copper column 4 and the case 1 is disconnected, so that the grounding connection between the PCB3 and the ground is disconnected. The electric connection structure is convenient to operate in connection and disconnection, and reversibility is achieved in operation. Because the paper clip-like structure 2 has elasticity, the problem that pins of the PCB3 are subjected to large stress and are easily damaged in a vibration environment when the copper column 4 and the sheet metal part of the case 1 are fixed by screws due to manufacturing and assembly tolerance is perfectly solved, the reliability of electrical connection can be guaranteed, and the PCB3 can be effectively protected.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (6)
1. An electrical connection structure of a clip-like structure is used for detachably connecting a chassis (1) with a grounding end of a PCB (3) in the chassis (1), and the chassis (1) is protected and grounded, and is characterized in that the electrical connection structure comprises a copper column (4) and a connecting screw (5), one end of the copper column (4) is locked on the grounding end of the PCB (3), and the other end of the copper column (4) faces the chassis (1) and is provided with a threaded hole; the novel cabinet is characterized in that a similar clip structure (2) is arranged at a position, corresponding to the copper column (4), on the cabinet (1), the similar clip structure (2) is provided with a central elastic arm (201), a screw mounting hole is formed in the central elastic arm (201), and the connecting screw (5) penetrates through the screw mounting hole and is connected with a threaded hole of the copper column (4).
2. The electrical connection structure of the paper clip-like structure according to claim 1, wherein the paper clip-like structure (2) is formed by forming a first U-shaped through hole (a) on the chassis (1), the central concave position of the first U-shaped through hole (a) is a central elastic arm (201), the screw mounting hole is formed on the central elastic arm (201), when the connection screw (5) is mounted in place, the central elastic arm (201) deforms and fits the end of the copper column (4), and when the connection screw (5) is dismounted, the central elastic arm (201) resets and leaves the copper column (4).
3. The electrical connection structure of a paper clip-like structure as claimed in claim 2, wherein a second U-shaped through hole (b) is further disposed outside the first U-shaped through hole (a), the U-shaped open end of the first U-shaped through hole (a) is oppositely inserted into the U-shaped open end of the second U-shaped through hole (b), and the first U-shaped through hole (a) and the second U-shaped through hole (b) are not communicated with each other; establish between first U-shaped through-hole (a) and second U-shaped through-hole (b) and establish to outer elastic arm (202), the tip of outer elastic arm (202) and the end connection of central elastic arm (201), just outer elastic arm (202) and central elastic arm (201) are zigzag winding setting.
4. The electrical connection structure of a paperclip-like structure as claimed in claim 3, wherein said outer resilient arm (202) has a width dimension smaller than a width dimension of said central resilient arm (201).
5. The electrical connection structure of a paper clip-like structure as claimed in claim 3, wherein the central elastic arm (201) is provided with at least two threaded mounting holes, and each threaded mounting hole is provided with a corresponding connecting screw (5); the PCB is characterized in that at least two copper columns (4) are arranged on the PCB (3), and the threaded mounting holes, the connecting screws (5) and the copper columns (4) are in one-to-one correspondence.
6. The electrical connection structure of a paperclip-like structure as claimed in claim 5, wherein the width dimension of the central elastic arm (201) between adjacent threaded mounting holes is smaller than the width dimension of both ends of the central elastic arm (201).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121229948.6U CN215070492U (en) | 2021-06-02 | 2021-06-02 | Electrical connection structure of similar clip structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121229948.6U CN215070492U (en) | 2021-06-02 | 2021-06-02 | Electrical connection structure of similar clip structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215070492U true CN215070492U (en) | 2021-12-07 |
Family
ID=79206890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121229948.6U Active CN215070492U (en) | 2021-06-02 | 2021-06-02 | Electrical connection structure of similar clip structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215070492U (en) |
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2021
- 2021-06-02 CN CN202121229948.6U patent/CN215070492U/en active Active
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