USB interface

Abstract

The utility model discloses a USB interface, which comprises an interface body and an adapter card, the adapter card is inserted and installed in the interface body, the adapter card comprises a group of golden fingers, a group of elastic sheets and a connecting piece, the elastic sheets are connected with first pins, the golden fingers are connected with second pins, and the second pins are connected with the connecting piece. The first pin and the second pin are provided with a first connecting section and a second connecting section respectively, the first connecting section and the second connecting section are connected with a circuit in the interface body, the first pin and the second pin are arranged in parallel, and the first pin and the second pin are staggered in the thickness direction of the first pin and the second pin. The side walls of the first connecting section and the second connecting section are located on the same plane, so that the distance from one end, close to the first pin, of the first connecting section to a circuit in the interface body is larger than the distance from one end, close to the second pin, of the second connecting section to the circuit in the interface body. The USB interface has the effects of ensuring the integrity and accuracy of signals and finally improving the high-frequency characteristic of the USB interface.

Description

TECHNICAL FIELD

[0001] The utility model relates to a USB interface. BACKGROUND

[0002] With the rapid development of electronic technology, the USB interface has become an indispensable connecting component in electronic equipment and is widely used in data transmission, equipment charging and other fields. Especially in the high-speed data transmission scene, the high-frequency characteristic requirement of signal transmission is getting higher and higher.

[0003] At present, in the traditional USB interface design, the lengths of multiple pins are often designed to be the same. However, this design has many drawbacks when transmitting high-frequency signals. From the perspective of signal transmission, the same length of pins will make the transmission delay of different signals unable to be effectively compensated, resulting in signal distortion and timing disorder, affecting the accurate sampling and transmission of data. At the same time, the consistent length of pins is easy to cause impedance mismatching problem, causing signal reflection and reducing signal quality.

[0004] In terms of electromagnetic compatibility, the same length of pins will enhance electromagnetic radiation, interfere with surrounding electronic equipment, and also make itself more susceptible to external interference. Moreover, the crosstalk problem between adjacent pins is also exacerbated due to the consistent length of pins, which seriously affects the integrity of the signal. SUMMARY

[0005] The utility model provides a USB interface.

[0006] The utility model provides a USB interface adopting the following technical scheme:

[0007] A USB interface, comprising an interface body and an adapter card, the adapter card is inserted and installed in the interface body, the adapter card comprises a group of gold fingers, a group of elastic sheets and connecting pieces, a plurality of units of the group of elastic sheets are respectively arranged between a plurality of units of the group of gold fingers, a plurality of the elastic sheets are respectively arranged between adjacent gold fingers, and the number of gold fingers is one more than the number of elastic sheets.

[0008] The elastic sheet is connected with a first pin, the gold finger is connected with a second pin, one end of the first pin away from the elastic sheet and one end of the second pin away from the gold finger are respectively provided with a first connecting section and a second connecting section, the first connecting section and the second connecting section are both connected with a circuit in the interface body, the first pin and the second pin are arranged in parallel with each other, the first pin and the second pin are staggered with each other in the thickness direction of the first pin and the second pin, and the side walls of the first connecting section and the second connecting section are located in the same plane, so that the distance from one end of the first connecting section close to the first pin to the circuit in the interface body is greater than the distance from one end of the second connecting section close to the second pin to the circuit in the interface body.

[0009] The elastic sheet and the gold finger are staggered, so that the distance between the elastic sheet and the gold finger in the thickness direction is increased, and mutual inductance exists between adjacent pins, and when the distance between the pins is increased, the magnetic field coupling degree between the pins is weakened, the mutual inductance coefficient is reduced, the impedance influence caused by the mutual inductance is reduced, the signal frequency components can be more accurately transmitted, the distortion degree of the signal waveform is reduced, the integrity and accuracy of the signal are ensured, and finally the high-frequency characteristics of the USB interface are improved.

[0010] Preferably, the side walls of the plurality of first pins in the thickness direction are located in the same plane, and the lengths of the plurality of first connecting segments are consistent.

[0011] Preferably, the side walls of the plurality of second pins in the thickness direction are located in the same plane, and the lengths of the plurality of second connecting segments are consistent.

[0012] Preferably, the end of the first connecting segment away from the first pin and the end of the second connecting segment away from the second pin are flush.

[0013] The ends of the first connecting segment and the second connecting segment are arranged to be flush, so that when the elastic sheet and the gold finger are connected to the circuit in the interface body, the circuit does not need to be complexly arranged to adapt to the different lengths of the first connecting segment and the second connecting segment, and the space in the interface body is more reasonably arranged.

[0014] Preferably, the second pin is arranged in the connecting piece, the gold finger extends and is attached to the outer side wall of the connecting piece, the elastic sheet protrudes from the outer side wall of the adapter card, and the protruding direction of the gold finger is consistent with the protruding direction of the elastic sheet.

[0015] Preferably, there is a gap between the protruding apex of the elastic sheet and the closest outer side wall of the adapter card, so that the protruding apex of the elastic sheet and the outer side wall of the gold finger are staggered.

[0016] When the interface body is inserted into the target object, the elastic sheet is deformed to be tightly attached to the inner side wall of the insertion end of the target object, a stable connection signal is formed, the elastic sheet is more protruding, the tightness of the elastic sheet and the insertion port of the target object is higher, and the connection stability is improved. Meanwhile, the elastic sheet has a tendency to deform towards the connecting piece after being pressed for a long time, and the outwardly protruding elastic sheet can ensure that the protruding apex of the elastic sheet is tightly attached to the insertion port of the target object to achieve the effect of stable connection when the protruding apex of the elastic sheet moves inward.

[0017] In summary, the utility model has the following beneficial technical effects:

[0018] By staggering the placement of the contact springs and gold fingers, the distance between them in the thickness direction is increased, resulting in mutual inductance between adjacent pins. When the pin distance is increased, the magnetic field coupling between them weakens, and the mutual inductance coefficient decreases, thereby reducing the impedance effect caused by mutual inductance. Reducing this impedance effect allows for more accurate transmission of signal frequency components, reduces signal waveform distortion, ensures signal integrity and accuracy, and ultimately improves the high-frequency characteristics of the USB interface. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a USB interface according to this utility model.

[0020] Figure 2 This is a schematic diagram illustrating the structure of the adapter card.

[0021] Figure 3 This is a structural diagram used to illustrate the relative positions of the gold finger and the spring.

[0022] Figure 4 This is a side view used to illustrate the relative positions of the gold finger and the spring.

[0023] Explanation of reference numerals in the attached diagram: 1. Interface body; 2. Adapter card; 3. Gold finger; 4. Spring; 5. Connector; 6. First pin; 7. Second pin; 8. First connection segment; 9. Second connection segment. Detailed Implementation

[0024] The following is in conjunction with the appendix Figures 1-4 The present invention will be described in further detail below.

[0025] This utility model discloses a USB interface.

[0026] Reference Figure 1 as well as Figure 2 A USB interface includes an interface body 1 and an adapter card 2. The adapter card 2 is inserted and installed in the interface body 1. The adapter card 2 includes a set of gold fingers 3, a set of spring contacts 4 and a connector 5. Multiple units of the set of spring contacts 4 are respectively disposed between multiple units of the set of gold fingers 3. Multiple spring contacts 4 are respectively disposed between adjacent gold fingers 3. The number of gold fingers 3 is one more than the number of spring contacts 4.

[0027] The first pin 6 is connected with the elastic sheet 4, the second pin 7 is connected with the gold finger 3, the end of the first pin 6 away from the elastic sheet 4 and the end of the second pin 7 away from the gold finger 3 are respectively provided with a first connecting section 8 and a second connecting section 9, the first connecting section 8 and the second connecting section 9 are connected with the circuit in the interface body 1, the first pin 6 and the second pin 7 are arranged in parallel to each other, the first pin 6 and the second pin 7 are staggered in the thickness direction of the first pin 6 and the second pin 7, the side wall of the first connecting section 8 and the second connecting section 9 is located in the same plane, so that the distance from the end of the first connecting section 8 close to the first pin 6 to the circuit in the interface body 1 is greater than the distance from the end of the second connecting section 9 close to the second pin 7 to the circuit in the interface body 1.

[0028] The elastic sheet 4 and the gold finger 3 are arranged staggered, so that the distance of the elastic sheet 4 and the gold finger 3 in the thickness direction is increased, and mutual inductance exists between adjacent pins, when the distance of the pins is increased, the degree of magnetic field coupling between them is weakened, the mutual inductance coefficient is reduced, so that the impedance influence caused by the mutual inductance is reduced, the signal frequency components can be transmitted more accurately, the distortion degree of the signal waveform is reduced, the integrity and accuracy of the signal are ensured, and finally the high frequency characteristics of the USB interface are improved.

[0029] With reference to Figure 2 and Figure 3 In the embodiment, the side walls of the plurality of first pins 6 in the thickness direction are located in the same plane, and the lengths of the plurality of first connecting sections 8 are consistent.

[0030] With reference to Figure 2 and Figure 3 In the embodiment, the side walls of the plurality of second pins 7 in the thickness direction are located in the same plane, and the lengths of the plurality of second connecting sections 9 are consistent.

[0031] With reference to Figure 2 and Figure 3 In the embodiment, the end of the first connecting section 8 away from the first pin 6 and the end of the second connecting section 9 away from the second pin 7 are flush.

[0032] The end of the first connecting section 8 and the end of the second connecting section 9 are arranged flush, so that when the elastic sheet 4 and the gold finger 3 are connected to the circuit in the interface body 1, the circuit does not need to be complexly set to adapt to the different lengths of the first connecting section 8 and the second connecting section 9, and the space in the interface body 1 is more reasonably arranged.

[0033] With reference to Figure 2 and Figure 3 In the embodiment, the second pin 7 is arranged in the connecting piece 5, the gold finger 3 extends and is attached to the outer side wall of the connecting piece 5, the elastic sheet 4 protrudes from the outer side wall of the adapter card 2, and the protruding direction of the gold finger 3 is consistent with the protruding direction of the elastic sheet 4.

[0034] Reference Figure 3 as well as Figure 4 In this embodiment, there is a gap between the protruding tip of the spring 4 and the outer wall of the nearest adapter card 2, so that the protruding tip of the spring 4 and the outer wall of the gold finger 3 are offset from each other.

[0035] When the interface body 1 is inserted into the target object, the spring piece 4 is deformed by the inner wall of the insertion end of the target object and thus forms a tight connection signal. The spring piece 4 is designed to make the tightness between the spring piece 4 and the insertion interface of the target object even higher, thereby improving the connection stability. At the same time, after being squeezed for a long time, the spring piece 4 tends to deform inward towards the connector 5. The outward movement of the spring piece 4 can still ensure that the apex of the spring piece 4 is tight with the insertion interface of the target object when the apex of the spring piece 4 moves inward, thereby achieving a stable connection effect.

[0036] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A USB interface, characterized in that: The interface includes an interface body and an adapter card. The adapter card is inserted and installed in the interface body. The adapter card includes a set of gold fingers, a set of spring contacts and connectors. Multiple units of the set of spring contacts are respectively located between multiple units of the set of gold fingers. Multiple spring contacts are respectively located between adjacent gold fingers. The number of gold fingers is one more than the number of spring contacts. The spring contact is connected to a first pin, and the gold finger is connected to a second pin. The end of the first pin away from the spring contact and the end of the second pin away from the gold finger are respectively provided with a first connecting segment and a second connecting segment. Both the first connecting segment and the second connecting segment are connected to the circuit inside the interface body. The first pin and the second pin are arranged parallel to each other and are offset from each other in their own thickness direction. The sidewalls of the first connecting segment and the second connecting segment are located on the same plane, such that the distance from the end of the first connecting segment near the first pin to the circuit inside the interface body is greater than the distance from the end of the second connecting segment near the second pin to the circuit inside the interface body.

2. The USB interface according to claim 1, characterized in that: The sidewalls of the multiple first pins along the thickness direction are located in the same plane, and the lengths of the multiple first connection segments are consistent.

3. The USB interface according to claim 2, characterized in that: The sidewalls of the multiple second pins along the thickness direction are located in the same plane, and the multiple second connection segments have the same length.

4. The USB interface according to claim 3, characterized in that: The end of the first connecting segment away from the first pin and the end of the second connecting segment away from the second pin are flush.

5. The USB interface according to claim 4, characterized in that: The second pin is located inside the connector, the gold finger extends and fits against the outer wall of the connector, the spring protrudes from the outer wall of the adapter card, and the protruding direction of the gold finger is consistent with the protruding direction of the spring.

6. The USB interface according to claim 5, characterized in that: There is a gap between the protruding tip of the spring and the outer wall of the nearest adapter card, so that the protruding tip of the spring and the outer wall of the gold finger are offset from each other.

Images