CN111403944A - Shrapnel for RF signal transmission - Google Patents

Abstract

An elastic sheet for radio frequency signal transmission, comprising a base plate, a tension part formed by reverse bending from one end of the base plate, a suction part extending from the tension part and formed above the base plate, and a suction part extending obliquely upward from the suction part The elastic arm formed by extension and the support arm formed by bending and extending from the elastic arm toward the substrate, the suction part is formed by extending obliquely upward at a certain angle with the plane where the substrate is located, and the suction A joint portion is formed at the connection between the elastic arm and the elastic arm. The shrapnel of the present application has better radio frequency transmission capability.

Description

Shrapnel for RF signal transmission

technical field

The present application relates to the field of electrical connectors, in particular to a shrapnel for radio frequency signal transmission.

Background technique

Shrapnel products are widely used in the field of electronic equipment (such as smart phones) to connect various signals, such as connecting electronic equipment such as vibration motors to circuit boards, and some are used to fix on printed circuit boards, elastic contact antennas (Some mobile phone antennas are directly composed of metal casings) to transmit the RF signals of the antenna to the printed circuit board. Referring to FIG. 1 , the conventional elastic sheet 10 generally includes a welding substrate 11 , a tension portion 12 formed by reverse bending from one end of the substrate 11 , and a tension portion 12 extending parallel to above the substrate 11 . The horizontal portion 13 , an elastic arm 14 extending obliquely upward from the free end of the horizontal portion 13 , and a support arm 16 extending from the elastic arm 14 toward the substrate 11 . In the working state, the top end of the elastic arm 14 is pressed down by the object to be contacted, and the supporting end 163 of the supporting arm 16 slides on the upper surface of the base plate 11 toward the tensioning part 12, and is finally in a crimped state. In the working state, at this time, the joint portion 18 of the horizontal portion 13 and the elastic arm 14 is basically located above the support end portion 163 and the interval is very small. At this time, it will affect the interference of the radio frequency signal and affect the radio frequency. normal transmission of the loop.

SUMMARY OF THE INVENTION

In view of this, it is necessary to provide a shrapnel for radio frequency signal transmission, which has a low height and is suitable for transmitting radio frequency signals.

In order to solve the above technical problems, the present application provides an elastic sheet for radio frequency signal transmission, which includes a substrate, a tensioning portion formed by reverse bending from one end of the substrate, and a tensioning portion extending from the tensioning portion and formed above the substrate. A suction part, an elastic arm formed by extending obliquely upward from the suction part, and a support arm formed by bending and extending from the elastic arm toward the base plate, the suction part is at a certain angle with the plane where the base plate is located It is formed by extending obliquely upward, and a joint portion is formed at the connection between the suction portion and the elastic arm.

Preferably, the extension inclination angle of the suction portion is 0.1-4 degrees.

Preferably, the extending inclination angle of the suction part is 0.5-2 degrees.

Preferably, the extending inclination angle of the suction part is 1.5 degrees.

Preferably, the top of the elastic arm is bent toward the substrate to form an arc-shaped bending portion, and the arc-shaped bending portion is punched upward to form a contact portion, which is in contact with the object to be connected and is push down.

Preferably, the support arm includes a first support arm portion extending from the arc-shaped bending portion toward the elastic arm, and a second support portion being bent and extending from the first support arm portion toward the substrate An arm portion and a support end portion formed on the free end of the second support arm portion.

Preferably, when the contact part is pressed down by the object to be contacted, the supporting end part is pressed against the base plate and slides toward the direction of the tension part.

Preferably, when the elastic sheet is in a working state, a gap exists between the joint portion and the support end portion.

Preferably, the two lateral sides of the support end protrude outward to form pre-pressed ends, and the elastic sheet further includes protective wings that are bent upward from the lateral two sides of the base plate and located on both lateral sides of the support arm, A pre-compression cavity is opened at the protective wing corresponding to the pre-compression end, and the support end extends into the pre-compression cavity.

Preferably, when the elastic sheet is in a non-working state, the distance between the contact portion and the bottom surface of the substrate is 1.1 mm, and when the elastic sheet is in a working state, the distance between the contact portion and the bottom surface of the substrate is 0.4 mm mm.

The elastic sheet for RF signal transmission of the present application is formed by extending the suction portion obliquely upward at a certain angle, so that in the working state, a large distance is maintained between the support end portion and the joint portion to avoid the transmission of RF signals. When disturbed, the elastic force of the elastic arm is enhanced to obtain more stable electrical contact performance.

Description of drawings

The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application.

1 is a side view of the prior art shrapnel in a natural state and a working state;

2 is a perspective view of a shrapnel for radio frequency signal transmission of the present application;

FIG. 3 is a cross-sectional view of a shrapnel for radio frequency signal transmission of the present application;

FIG. 4 is a side view of the elastic sheet for radio frequency signal transmission of the application in a natural state and a working state;

FIG. 5 is a simulation diagram of the relationship between the elastic force and the displacement of the elastic arm when the existing elastic sheet and the elastic sheet of the present application are switched between the non-working state and the working state.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the specific embodiments of the present application and the corresponding drawings.

Please refer to FIG. 2 and FIG. 3 , the elastic sheet 20 for RF signal transmission of the present application includes a substrate 21 welded on a printed circuit board, a tensioning portion 22 formed by reverse bending from one end of the substrate 21 , The tightening portion 22 extends from a suction portion 23 above the base plate 21 , an elastic arm 24 extending obliquely upward from the suction portion 23 , and a support arm formed by bending and extending from the free end of the elastic arm 24 toward the base plate 21 . 26.

The suction part 23 and the base plate 21 extend at a certain angle, and the extension angle a is 0.1 to 4 degrees. The extension angle is shown in FIG. 3 , which means that the suction part 23 the angle between the substrate and the substrate. The extension angle is preferably 0.5 to 2 degrees; more preferably, the extension angle is 1.5 degrees.

When the suction part 23 is used to automatically assemble the patch, the elastic sheet 20 is suctioned through the air nozzle. A joint portion 28 is formed at the connection between the suction portion 23 and the elastic arm 24 , an arc-shaped bending portion 25 is formed at the top end of the elastic arm 24 , and an outer surface of the arc-shaped bending portion 25 is formed with a pass through. The raised contact portion 251 is punched. The support arm 26 includes a first support arm portion 261 extending from the arc-shaped bending portion 25 toward the elastic arm 24 , and a first support arm portion 261 extending from the lower end of the first support arm portion 261 toward the base plate 21 . The second support arm portion 262, the support end portion 263 formed at the end of the second support arm portion 262, and the preloaded end portions 264 formed protruding from both sides of the support end portion.

Two lateral sides of the base plate 21 are bent upward to form protective wings 27 . The protective wings 27 are provided with a pre-compression cavity 271 , and the pre-compression end portion 264 enters the pre-compression cavity 271 to pre-compress and limit the position. In order to ensure that the elastic piece 20 maintains a predetermined height in a non-working state.

Please continue to refer to FIG. 1 , FIG. 4 , and FIG. 5 , compared with the elastic sheet 10 of the prior art, in the working state of the elastic sheet 20 of the present application after being pressed down, the gap between the joint portion 28 and the supporting end portion 263 is The distance is much greater than the distance between the joint portion 18 and the support end portion 163 of the existing shrapnel, so that the transmission of the radio frequency signal can be prevented from being interfered, thereby reducing the normal transmission of the radio frequency signal.

Taking the product height H of the prior art shrapnel 10 and the shrapnel 20 of the present application as 1.1 mm, and the product height h in the working state as 0.4 mm (the height of the protective wing 27) as an example, the elastic force of the product and the height of the elastic arm pressing down are simulated. The relationship between the horizontal axis is the height of the elastic arm pressing down, the unit is mm, and the vertical axis is the elastic force provided by the elastic arm, the unit is N: the A and B curves are the downward pressing and elastic recovery curves of the elastic sheet 20 of the application, respectively. , C and D curves are respectively the depression and elastic recovery curves of the shrapnel 10 in the prior art. It can be clearly seen from the simulation diagram that the suction part 23 of the present application extends at a certain angle with the base plate 21, which can not only effectively increase the number of The distance between the joint portion 28 and the support end portion 263 is determined, and at the same time, the elastic force of the elastic arm 24 is better than the elastic force of the elastic sheet 10 in the prior art in the whole working state.

The elastic sheet 20 for RF signal transmission of the present application is formed by extending the suction portion 23 obliquely upward at a certain angle, so that in the working state, a large distance is maintained between the support end portion 263 and the joint portion 28 to avoid The transmission of the radio frequency signal is disturbed, and at the same time, the elastic force of the elastic arm 24 is enhanced to obtain more stable electrical contact performance.

The above descriptions are merely examples of the present application, and are not intended to limit the present application. Various modifications and variations of this application are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims (10)

1. An elastic sheet for radio frequency signal transmission, comprising a substrate, a tension portion formed by reverse bending from one end of the substrate, a suction portion extending from the tension portion and formed above the substrate, and a suction portion formed from the suction portion. An elastic arm extending obliquely upward and a support arm formed by bending and extending from the elastic arm toward the base plate, characterized in that the suction part is inclined upward at a certain angle to the plane where the base plate is located. formed, a joint portion is formed at the connection between the suction portion and the elastic arm. 2 . The elastic sheet for radio frequency signal transmission according to claim 1 , wherein the extension inclination angle of the suction portion is 0.1-4 degrees. 3 . 3 . The elastic sheet for transmitting radio frequency signals according to claim 2 , wherein the extension inclination angle of the suction portion is 0.5-2 degrees. 4 . 4 . The elastic sheet for transmitting radio frequency signals according to claim 3 , wherein the extension angle of the suction portion is 1.5 degrees. 5 . 5 . The elastic sheet for RF signal transmission according to claim 4 , wherein the top of the elastic arm is bent toward the substrate to form an arc-shaped bending portion, and the arc-shaped bending portion is punched upward to form an arc-shaped bending portion. 6 . The contact part is in contact with the object to be connected and is pressed down. 6 . The elastic sheet for RF signal transmission according to claim 5 , wherein the support arm comprises a first support arm portion extending from the arc-shaped bending portion toward the elastic arm, and a first support arm portion extending from the arc-shaped bending portion toward the elastic arm. A support arm portion is bent toward the base plate and extends to form a second support arm portion and a support end portion formed at the free end of the second support arm portion. 7 . The elastic sheet for radio frequency signal transmission according to claim 6 , wherein when the contact portion is pressed down by the object to be contacted, the supporting end portion abuts on the substrate and faces the substrate. 8 . Slide in the direction of the tension part. 8 . The elastic sheet for radio frequency signal transmission according to claim 7 , wherein when the elastic sheet is in a working state, a gap exists between the joint portion and the support end portion. 9 . 9 . The elastic sheet for radio frequency signal transmission according to claim 6 , wherein the two lateral sides of the support end are protruded outward to form pre-pressed ends, and the elastic sheet further comprises two lateral sides from the base plate. 10 . The protective wings located on both lateral sides of the support arm are bent laterally upward, and a pre-compression cavity is opened at the protective wing corresponding to the pre-compression end, and the support end extends into the pre-compression cavity. 10 . The elastic sheet for radio frequency signal transmission according to claim 9 , wherein when the elastic sheet is in a non-working state, the distance between the contact part and the bottom surface of the substrate is 1.1 mm, and the elastic sheet is in a working state. 11 . , the distance between the contact portion and the bottom surface of the substrate is 0.4 mm.

Images