TWI726814B - Circuit board fastening structure - Google Patents

Abstract

A circuit board fastening structure for connecting a first circuit board with a second circuit board is provided. The circuit board fastening structure includes a base, a seat, a supporting post and a rotating member. The base configured on the first circuit board includes a touch surface having a conductive part and an isolation part. The seat is configured on the second circuit board. The supporting post connects between the base and the seat. The rotating member electrically connects with the seat and includes a rotating surface and a conductive elastomer. The supporting post passes through the rotating member. The conductive elastomer connects with the rotating surface and extends toward the base. The rotating member can rotate relative to the base to make the conductive elastomer contacts the conductive part or the isolation part.

Description

Circuit board overlap structure

The present invention provides a circuit board overlap structure, in particular to a circuit board overlap structure that can be electrically connected or not.

Figure 1 is a schematic diagram of a conventional circuit board lap structure. Existing electronic products often have a stacked structure between circuit boards or with other components. As shown in FIG. 1, in order to lap the first circuit board 1, the second circuit board 2 and the base 3 together, they can be connected through the lap post 4. The lap post 4 may be used to lap multiple components together, for example, by means of screw connection, clamping connection, or the like. Here, the screw connection is taken as an example for description. The lap post 4 includes a stud 41 and a nut 42. The two ends of the stud 41 respectively pass through the through hole 11 of the first circuit board 1 and the through hole 21 of the second circuit board 2, one end is locked to the base 3, and the other end is locked to the nut 42.

In some cases, in order to make the electrical communication between the two circuit boards, the through holes 11 and 21 are conductive holes, and the lap post 4 is also made of conductive material. However, in some cases, if the lap position is located in an electrically sensitive area on the circuit board, the lap post 4 made of an electrically insulating material will be used for the overlap. In this way, problems such as electrostatic discharge (ESD) or electromagnetic interference (EMI) caused by electrical connection caused by overlap can be avoided. Therefore, when assembling electronic products, in response to different needs, it is necessary to use the lap posts 4 of different materials for lap joints. As a result, it not only increases the cost of material preparation, but also increases assembly complexity and production error rate.

In view of the foregoing problems, an embodiment of the present invention provides a circuit board lap structure, which is suitable for connecting the first circuit board and the second circuit board. The circuit board lap structure includes: a base, a seat body, a supporting column and a rotating part. The base is used to be arranged on the first circuit board, and includes a contact surface, and the contact surface has a conductive portion and an isolation portion. The base body is used to be arranged on the second circuit board. The support column is connected between the base and the seat body. The rotating part is electrically connected to the base body and includes a rotating surface and a conductive elastic body. The supporting column is provided with a rotating part. The conductive elastic body is connected to the rotating surface and extends toward the base. The rotating member can rotate relative to the base to make the conductive elastic body contact the conductive part or the isolation part.

In some embodiments, the conductive portion and the isolation portion are respectively separated from the position where the support pillar contacts the contact surface by the same distance.

In some embodiments, the conductive elastomer is a circular arc segment. One end of the arc segment has an extension, and the extension is connected to the rotating surface of the rotating member. The other end of the arc segment has a contact portion, and the contact portion is in contact with the contact surface of the base.

In some embodiments, the conductive elastomer is a circular arc segment. The arc segment includes two extension portions located at two opposite ends and a contact portion located between the two extension portions. The ends of the two extensions are connected to the rotating surface of the rotating member. The contact portion is in contact with the contact surface of the base.

In some embodiments, the circuit board overlap structure further includes a conductive member located between the base and the rotating part, so that the rotating part is electrically connected to the base via the conductive member.

In some embodiments, the conductive member includes at least one conductive elastic sheet. The conductive elastic sheet is in the shape of a coil and abuts against the rotating member.

In some embodiments, the conductive member includes a plurality of conductive elastic sheets. These conductive elastic sheets are arc-shaped grids around and embossed on the base.

In some embodiments, the rotating member is cylindrical and covers the outside of the seat body, and has a ring side wall that is connected to the conductive member.

In some embodiments, the base includes a conductive base and an isolation base that are overlapped. The conductive seat has a conductive bump, and the isolation seat has a through hole. The conductive bump is exposed on the surface of the isolation seat through the through hole to form a conductive portion.

In some embodiments, the isolation seat further has a positioning groove to form an isolation portion.

In some embodiments, the conductive seat includes a first conductive seat and a second conductive seat that are overlapped. The first conductive seat has a conductive pillar, and the second conductive seat has an opening. The conductive pillar protrudes through the opening to form a conductive bump.

According to the circuit board overlap structure of some embodiments of the present invention, two circuit boards can be overlapped together, and it can be selected whether the two circuit boards are electrically connected through the overlap structure. In this way, there is no need to prepare different lap materials according to whether the electrical conduction or not, and the material preparation cost can be saved. On the other hand, it can also reduce assembly complexity and production error rate.

1: The first circuit board

11: Through hole

2: The second circuit board

21: Through hole

3: base

4: lap post

41: Stud

42: Nut

100: Pedestal

110: Conduction part

120: contact surface

121: conductive part

122: Isolation Department

130: Conductive seat

131: conductive bump

132: Column

140: isolation seat

141: Through Hole

142: positioning slot

143: Window

144: Hollow Column

150: The first conductive seat

151: Conductive column

160: second conductive seat

161: open

162: Column

200: seat body

210: Conduction part

220: contact surface

221: Groove

230: connecting part

300: support column

310: Card connector

400: Rotating parts

410: Rotating Surface

420: conductive elastomer

421: Extension

422: Contact

430: Through hole

440: Ring sidewall

500: conductive member

510: conductive shrapnel

520: conductive shrapnel

530: Conductive tape

610: The first circuit board

620: second circuit board

[Figure 1] is a schematic diagram of a conventional circuit board lap structure.

[Figure 2] is a perspective cross-sectional view of a circuit board lap structure according to an embodiment of the present invention.

[Figure 3] is a cross-sectional view of a circuit board lap structure according to an embodiment of the present invention.

[Figure 4] is a cross-sectional view of another state of the circuit board overlap structure of an embodiment of the present invention.

[Figure 5] is a three-dimensional exploded view (1) of the circuit board lap structure according to an embodiment of the present invention.

[Figure 6] is a three-dimensional exploded view (2) of the circuit board lap structure according to an embodiment of the present invention.

[Fig. 7] and [Fig. 8] are three-dimensional schematic diagrams of conductive elastomers according to some embodiments of the present invention.

[Figure 9] is a perspective exploded view of a base of another embodiment of the present invention.

[Figure 10] is a cross-sectional view of a circuit board lap structure according to another embodiment of the present invention.

Refer to Figure 2 to Figure 6 together. 2 is a perspective cross-sectional view of a circuit board overlap structure according to an embodiment of the invention. 3 is a cross-sectional view of a circuit board overlap structure according to an embodiment of the invention. 4 is a cross-sectional view of another state of the circuit board overlap structure according to an embodiment of the present invention. Fig. 5 is a three-dimensional exploded view (1) of the circuit board overlap structure according to an embodiment of the present invention. Fig. 6 is a three-dimensional exploded view (2) of the circuit board overlap structure according to an embodiment of the present invention. The circuit board overlap structure may be suitable for connecting the first circuit board 610 and the second circuit board 620. The circuit board overlapping structure includes a base 100, a base 200, a supporting column 300 and a rotating member 400.

The base 100 is used to be disposed on the first circuit board 610. The base 100 includes a conductive portion 110 and a contact surface 120. The contact surface 120 has a conductive portion 121 and an isolation portion 122. The conductive portion 110 is electrically connected to the conductive portion 121, and the conductive portion 110 is electrically isolated from the isolation portion 122. When the base 100 is disposed on the first circuit board 610, the conductive portion 121 can be electrically connected to the first circuit board 610 via the conductive portion 110. In this embodiment, the conductive portion 110 can also be fixedly disposed on the first circuit board 610 through Surface Mount Technology (SMT), but the present invention is not limited to this. In some embodiments, the base 100 may be fixedly arranged on the first circuit board 610 through other methods (such as plug-in connection, screw connection, snap connection, etc.).

The base 100 is composed of multiple components. Here, the base 100 includes a conductive seat 130 and an isolation seat 140 that are overlapped. The conductive base 130 is made of a conductive material, and the isolation base 140 is made of an electrically insulating material. The conductive seat 130 has a conductive bump 131, and the isolation seat 140 has a through hole 141. The conductive bump 131 is exposed on the surface of the isolation seat 140 through the through hole 141 to form the conductive portion 121. Separate The separation seat 140 also has a positioning groove 142 to form an isolation portion 122. The conductive seat 130 further has a column 132, and the isolation seat 140 further has a window 143 and a hollow column 144. The window 143 communicates with the inner space of the hollow column 144, and the inner space of the hollow column 144 corresponds to the upright column 132. Thereby, the upright post 132 can extend into the inner space of the hollow post 144 through the window 143 to form the support post 300.

In some embodiments, the isolation seat 140 is formed by injection molding.

In some embodiments, the conductive portion 121 is made of a conductive material, and the isolation portion 122 is made of an electrically insulating material. In some embodiments, the isolation portion 122 is made of a conductive material, and is electrically isolated from the conductive portion 110 by other electrically insulating elements.

The base 200 is disposed on the second circuit board 620. The base 200 includes a conductive portion 210, a contact surface 220 and a connecting portion 230. The conducting portion 210 is electrically connected to the connecting portion 230. The connecting portion 230 is electrically connected to the rotating member 400. In this embodiment, the circuit board lap structure further includes a conductive member 500. The conductive member 500 is made of a conductive material. The conductive member 500 is located between the base 200 and the rotating element 400, and is electrically connected to the rotating element 400 and the connecting portion 230 of the base 200, respectively. In this way, the rotating member 400 can be electrically connected to the base 200 via the conductive member 500. In some embodiments, the connecting portion 230 may be electrically connected to the rotating member 400 in other ways, for example, a conductive agent (such as conductive oil) is added between the closely-packed rotating member 400 and the base 200.

4, the support column 300 is connected between the base 100 and the base 200, so that the base 100 and the base 200 maintain a distance. In this embodiment, one end of the support column 300 is to fix the connection base 100, and the other end of the support column 300 abuts against the contact surface 220 of the base 200. Here, the contact surface 220 is opposite to the conducting portion 210, but the invention is not limited to this. It should be noted that, in order to clearly show the rotating member 400, FIGS. 2 and 3 show a schematic diagram of a state where the support column 300 has not abutted against the abutting surface 220 of the base body 200.

As shown in FIGS. 2 and 5, in some embodiments, the abutting surface 220 of the seat body 200 includes a groove 221 that can receive a portion of the support column 300 to assist in firmly abutting the support column 300. Here, the opening shape of the groove 221 is a circle as an example, but the present invention is not limited to this. When the supporting column 300 abuts on the base 200, the base 100 contacts the rotating member 400 (in order to present the conductive elastic body 420, it is not clearly shown in FIG. 4). The base 100 and the rotating member 400 provide supporting force to maintain the distance between the first circuit board 610 and the second circuit board 620.

The rotating element 400 includes a rotating surface 410 and a conductive elastic body 420. The rotating surface 410 has a through hole 430 for the supporting column 300 to pass through the rotating member 400 so that the rotating surface 410 of the rotating member 400 can rotate the supporting column 300 as an axis. The conductive elastic body 420 is connected to the rotating surface 410 and extends toward the base 100. Therefore, by rotating the rotating member 400 relative to the base 100, the conductive elastic body 420 can be brought into contact with the conductive portion 121 or the isolation portion 122. When the conductive elastic body 420 contacts the conductive portion 121, the conductive portion 110 of the base 100 and the conductive portion 210 of the base 200 are electrically connected, so that the first circuit board 610 and the second circuit board 620 can be electrically connected through the overlapping structure Conduction. When the conductive elastic body 420 contacts the isolation portion 122, the conductive portion 110 of the base 100 and the conductive portion 210 of the base 200 are electrically isolated, so that the first circuit board 610 and the second circuit board 620 are not electrically connected through the overlapping structure. Conduction.

In some embodiments, the support column 300 is fixedly connected to at least one of the base 100 and the base 200.

In some embodiments, the support column 300 is a detachable connection between the base 100 and the base 200, and the rotating member 400 can be rotatable relative to the support column 300.

In this embodiment, one end of the support column 300 has a clamping portion 310. Here, the clamping portion 310 is an arrow-shaped elastic clasp, which is used to hook the rotating part 400 to avoid the rotating part 400. Detach from the support column 300. The arrow-shaped portion of the support column 300 at the end (ie, the end of the clamping portion 310) can be accommodated in the groove 221 of the abutting surface 220 of the seat body 200 (as shown in FIG. 4).

In this embodiment, the rotating member 400 further includes a ring side wall 440 connected to the rotating surface 410 so that the rotating member 400 has a cylindrical shape. The rotating member 400 covers the outside of the base 200. In other words, the cylindrical inner space is used for accommodating the conductive member 500 and the base 200. The ring sidewall 440 is connected to the conductive member 500 so that the base 200 and the rotating part 400 are electrically connected via the conductive member 500.

In some embodiments, the conductive member 500 may be realized in the form of a wire or a conductive spring sheet, for example. In this embodiment, the conductive member 500 includes a plurality of conductive elastic pieces 510 and 520. The conductive elastic sheet 520 is in the shape of an arched grid and surrounds and emboss on the base 200. In other words, the conductive elastic pieces 520 are arranged at intervals around the side surface of the base 200, and each conductive elastic piece 520 is arched and protrudes in a direction away from the base 200. The protruding part of the conductive elastic piece 520 presses against the ring side wall 440 of the rotating member 400 to maintain the electrical connection between the conductive member 500 and the rotating member 400, and also to keep the rotating member 400 stable. The conductive member 500 further includes two conductive strips 530 respectively connected to two ends of the conductive elastic sheet 520. In this embodiment, two conductive elastic sheets 510 are taken as an example, but the present invention is not limited to this, and there may be more or less number. One end of the conductive elastic piece 510 is connected to other members of the conductive member 500 (here, the connecting conductive band 530) to be electrically connected to the base 200. The conductive elastic sheet 510 is wound and has an elastic restoring force, and can fully press against the rotating member 400 to maintain the electrical connection between the conductive member 500 and the rotating member 400. The conductive elastic sheet 510 is wound toward the direction of the base 200. In addition to abutting the rotating member 400, the conductive elastic piece 510 can also contact the base 200 at its end.

The base 200 further includes a connecting portion 230 for connecting the conductive member 500. In this In the embodiment, the connecting portion 230 is located on the side surface of the base 200 and is recessed relative to the conductive portion 210 and the contact surface 220, so that the grid-shaped conductive elastic piece 520 and the two conductive strips 530 of the conductive member 500 can be clamped therein.

In this embodiment, the conductive elastic body 420 is a circular arc segment, and includes two extension portions 421 located at two opposite ends, and a contact portion 422 located between the extension portions 421. The extension 421 is connected to the rotating surface 410 of the rotating member 400. The contact portion 422 is in contact with the contact surface 120 of the base 100. Thereby, the position of the conductive elastic body 420 in contact with the base 100 can be changed by rotating the rotating member 400 leftward (clockwise) or rightward (counterclockwise).

7 and 8 are three-dimensional schematic diagrams of the conductive elastomer 420 according to some embodiments of the present invention. Different from the conductive elastic body 420 in the previous embodiment, it has two extensions 421. Here, the conductive elastic body 420 has only one extension 421. The extension 421 is located at one end of the conductive elastic body 420, and the other end of the conductive elastic body 420 has A contact portion 422 in contact with the contact surface 120 of the base 100. The rotating member 400 shown in FIG. 7 is adapted to rotate left to change the position where the conductive elastic body 420 contacts the base 100; the rotating member 400 shown in FIG. 8 is adapted to rotate right to change the position where the conductive elastic body 420 contacts the base 100. Seat 100 position.

In some embodiments, the contact portion 422 has a bump for positioning on the conductive portion 121 or the isolation portion 122, but the invention is not limited thereto.

In some embodiments, the conductive elastic body 420 is formed into a circular arc segment by punching the rotating surface 410 of the rotating member 400.

Refer to Figure 3 and Figure 6. In some embodiments, corresponding to the conductive elastic body 420 having a circular arc segment, the conductive portion 121 and the isolation portion 122 of the base 100 are respectively separated from the position where the support column 300 contacts the contact surface 120 at the same distance. In other words, the conductive portion 121 and the isolation portion 122 It is located on a circle with the position where the support column 300 contacts the contact surface 120 as the center of the circle.

Refer to Figure 9 and Figure 10. FIG. 9 is an exploded perspective view of a base 100 according to another embodiment of the present invention. 10 is a cross-sectional view of a circuit board overlap structure according to another embodiment of the invention. Compared with the foregoing embodiment, the difference is that the conductive base 130 can be composed of multiple components. Here, the conductive seat 130 includes a first conductive seat 150 and a second conductive seat 160 that are overlapped. The first conductive seat 150 has a conductive pillar 151, and the second conductive seat 160 has an opening 161 and a pillar 162. The conductive pillar 151 protrudes through the opening 161 to form a conductive bump 131. The upright post 162 can extend into the inner space of the hollow post 144 to form the aforementioned support post 300. Compared with forming the conductive seat 130 with a single component, the conductive seat 130 is formed by multiple components, which can reduce the manufacturing difficulty of forming each component.

In some embodiments, the first conductive base 150 and the second conductive base 160 are fixed by gluing.

In some embodiments, the base 200 and the rotating member 400 are made of conductive materials.

The shapes of the base 100, the base 200, the supporting column 300, the rotating member 400, and the conductive member 500 of the above-mentioned embodiment are only examples, and the present invention is not limited thereto.

According to the circuit board overlap structure of some embodiments of the present invention, two circuit boards can be overlapped together, and it can be selected whether the two circuit boards are electrically connected through the overlap structure. In this way, there is no need to prepare different lap materials according to whether the electrical conduction or not, and the material preparation cost can be saved. On the other hand, it can also reduce assembly complexity and production error rate. In addition, the circuit board lap structure according to some embodiments of the present invention is arranged on the circuit board through SMT, which can save the wiring space of the circuit board.

100: Pedestal

110: Conduction part

120: contact surface

121: conductive part

122: Isolation Department

130: Conductive seat

131: conductive bump

140: isolation seat

142: positioning slot

200: seat body

210: Conduction part

220: contact surface

230: connecting part

300: support column

310: Card connector

400: Rotating parts

410: Rotating Surface

420: conductive elastomer

440: Ring sidewall

500: conductive member

510: conductive shrapnel

520: conductive shrapnel

530: Conductive tape

610: The first circuit board

620: second circuit board

Claims (11)

A circuit board overlap structure suitable for connecting a first circuit board and a second circuit board. The circuit board overlap structure includes: a base for being arranged on the first circuit board, the base including a contact Surface, the contact mask has a conductive part and an isolating part; a seat body for being arranged on the second circuit board; a support column connected between the base and the seat body; and a rotating part, which is electrically connected The base body, the rotating member includes a rotating surface and a conductive elastic body, the support column passes through the rotating member, the conductive elastic body is connected to the rotating surface and extends toward the base, and the rotating member can be relative to the The base rotates to make the conductive elastic body contact the conductive part or the isolation part. The circuit board overlap structure according to claim 1, wherein the conductive portion and the isolation portion are respectively separated from the position where the support column contacts the contact surface at the same distance. The circuit board overlap structure according to claim 1, wherein the conductive elastic body is an arc segment, one end of the arc segment has an extension, and the extension is connected to the rotating surface of the rotating member. The other end of the arc segment has a contact portion, and the contact portion contacts the contact surface of the base. The circuit board overlap structure according to claim 1, wherein the conductive elastic body is an arc segment, and the arc segment includes two extension portions located at two opposite ends and a contact portion located between the two extension portions, the The ends of the two extension parts are connected to the rotating surface of the rotating part, and the contact part contacts the contact surface of the base. The circuit board lap structure described in claim 1 further includes a conductive member located between the base body and the rotating member, so that the rotating member is electrically connected to the base body through the conductive member. The circuit board overlap structure according to claim 5, wherein the conductive member includes at least one conductive elastic sheet, and the at least one conductive elastic sheet is wound against the rotating member. The circuit board lap structure according to claim 5, wherein the conductive member includes a plurality of conductive elastic sheets, and the conductive elastic sheets are arc-shaped grid-shaped surrounding and embossed on the base. The circuit board lap structure according to claim 5, wherein the rotating member is cylindrical and covers the outside of the seat body, and has a ring side wall connected with the conductive member. The circuit board lap structure according to claim 1, wherein the base includes a conductive base and an isolation base that are superimposed, the conductive base has a conductive bump, the isolation base has a through hole, and the conductive bump The block is exposed on the surface of the isolation seat through the through hole to form the conductive portion. The circuit board overlap structure according to claim 9, wherein the isolation seat further has a positioning groove to form the isolation portion. The circuit board lap structure according to claim 9, wherein the conductive seat includes a first conductive seat and a second conductive seat that are superimposed, the first conductive seat has a conductive column, and the second conductive seat has An opening through which the conductive pillar protrudes to form the conductive bump.

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