Electrical signal transmission device

CN224844187UActive Publication Date: 2026-10-09ACCTON TECHNOLOGY CORPORATION
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Patent Information

Application Number
CN202521846453.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-08-28
Publication Date
2026-10-09
Estimated Expiration
2035-08-28

AI Technical Summary

Technical Problem

[0003]目前,测量电子装置的电讯号通常需要拆开电子装置的机壳,不仅增加了测量的程序,还可能对电子装置的功能造成影响

Benefits of technology

[0007]本实用新型的效果在于,第一开口的壁面于第二方向抵靠第一抵接部且朝第二方向施力,使接脚于第二方向稳定抵接接垫,由此,接脚稳定地与接垫接触形成电连接,使用者可通过接头引出接垫的电讯号,以供进一步的分析或监测,由此,无需拆开电子装置即可测量电子装置的电讯号,有利于即时的分析或监测。使用完毕后,便可将电讯号传输装置拆离电子装置。

✦ Generated by Eureka AI based on patent content.

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Abstract

An electrical signal transmission device includes a circuit board, a pin, a connector and a coupling frame. The circuit board includes an insertion section and an external section; the pin is disposed on the insertion section; the connector is disposed on the external section and electrically connected to the pin; the coupling frame includes a base, a first abutting section and a coupling section, wherein the base is coupled to the external section of the circuit board, at least a portion of the first abutting section corresponds to the insertion section of the circuit board; the coupling section is spaced apart from the first abutting section in a first direction. When the electrical signal transmission device is coupled to an electronic device, the circuit board is inserted into a first opening of a panel of the electronic device, a wall surface of the first opening abuts against the first abutting section in a second direction opposite to the first direction, so that the pin abuts against a pad in the second direction, and the coupling section of the coupling frame is coupled to the panel in a detachable manner.
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Description

Technical Field

[0001] This utility model relates to a fixture for measuring electrical signals; in particular, it refers to an electrical signal transmission device that can be externally connected to an electronic device. Background Technology

[0002] With the advancement of technology, electronic devices are playing an increasingly important role in various fields. These devices are typically used to perform specific functions, such as data processing, data manipulation, and data transmission. Accurate measurement and analysis of the electrical signals from electronic devices is a crucial task for R&D engineers and test engineers in product development and maintenance.

[0003] Currently, measuring the electrical signals of electronic devices typically requires disassembling the device's casing, which not only increases the measurement process but may also affect the device's functionality. Furthermore, when electronic devices are components of a system, such as interface cards, engineers often cannot measure electrical signals in real-time during system operation, limiting the ability to monitor device performance and diagnose faults promptly.

[0004] Therefore, the existing methods for measuring electrical signals are still imperfect and need further improvement. Summary of the Invention

[0005] In view of this, the purpose of this utility model is to provide an electrical signal transmission device that can be connected to an electronic device to extract electrical signals from the electronic device.

[0006] To achieve the above objectives, this utility model provides an electrical signal transmission device that can be detachably coupled to an electronic device. The electronic device includes a panel and a device circuit board. The panel has a first opening, and the device circuit board is located on one side of the panel. The device circuit board has at least one pad, which is located on one side of the first opening and faces a first direction. The electrical signal transmission device includes a circuit board, at least one pin, a connector, and a mounting bracket. The circuit board has a first surface and a second surface facing away from each other. The circuit board includes an insertion section and an outer section. At least one pin is disposed in the insertion section of the circuit board and is located on the first surface. The connector is disposed in the outer section of the circuit board and electrically connected to at least one pin. The mounting bracket includes a base, a first abutment portion, and a mounting portion. The base is coupled to the outer section of the circuit board, and at least a portion of the first abutment portion corresponds to the insertion section of the circuit board and faces away from the first surface of the circuit board. The mounting portion is spaced apart from the first abutment portion in the first direction. When the signal transmission device is combined with the electronic device, the circuit board is inserted into the first opening of the panel of the electronic device, a wall of the first opening abuts against the first abutment in a second direction opposite to the first direction, such that at least one pin abuts against at least one pad in the second direction, and the connecting part of the connecting frame is detachably connected to the panel.

[0007] The advantage of this invention is that the wall surface of the first opening abuts against the first contact portion in the second direction and applies force in the second direction, so that the pin stably abuts against the pad in the second direction. Thus, the pin stably contacts the pad to form an electrical connection. The user can lead out the electrical signal of the pad through the connector for further analysis or monitoring. Therefore, the electrical signal of the electronic device can be measured without disassembling the electronic device, which is beneficial for real-time analysis or monitoring. After use, the electrical signal transmission device can be detached from the electronic device. Attached Figure Description

[0008] Figure 1 This is a perspective view of the electrical signal transmission device and electronic device according to a first preferred embodiment of the present invention.

[0009] Figure 2 This is an exploded perspective view of the electrical signal transmission device according to the first preferred embodiment of the present invention.

[0010] Figure 3 The first preferred embodiment of the present invention is shown in the front view of the signal transmission device integrated into an electronic device.

[0011] Figure 4 for Figure 3 A sectional view along the AA direction.

[0012] Figure 5 This is a schematic diagram showing the electrical signal transmission device extending into the first opening.

[0013] Figure 6 This is a schematic diagram showing the inclined surface of the first opening's hole wall abutting the frame.

[0014] Figure 7 This is a perspective view of the electrical signal transmission device combined with an electronic device, which is a first preferred embodiment of the present invention.

[0015] Figure 8 This is a perspective view of an electrical signal transmission device integrated into an electronic device, representing a second preferred embodiment of the present invention.

[0016] Figure 9 This is a perspective view of the electrical signal transmission device and electronic device according to a third preferred embodiment of the present invention.

[0017] Figure 10 As shown in the schematic diagram, the connecting member of the signal transmission device of the fourth preferred embodiment of the present invention extends into the third opening.

[0018] Figure 11 This is a schematic cross-sectional view showing the integration of an electrical signal transmission device into an electronic device according to a fifth preferred embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures

[0020] 1-5: Telecommunication signal transmission devices

[0021] 10: Circuit board

[0022] 10a: First surface

[0023] 10b: Second surface

[0024] 12: Inserted segment

[0025] 14: Branch Board

[0026] 142: End

[0027] 16: Grooving

[0028] 18: External segment

[0029] 182: Positioning hole

[0030] 184: Perforation

[0031] 20: Foot Connection

[0032] 22: Connector

[0033] 24: Assembly frame

[0034] 26: Base

[0035] 262: Positioning convex part

[0036] 264: Screw hole

[0037] 28: First contact point

[0038] 30: Joint

[0039] 32: Bevel

[0040] 34: Guide plate

[0041] 36: folding plate

[0042] 38: End plate

[0043] 382: Face to Face

[0044] 40: Extension

[0045] 42: Second contact section

[0046] 44: Frame

[0047] 46: Connecting parts

[0048] 462: Operation button

[0049] 464: Hook and Loop

[0050] 48: Bolt

[0051] 50: Insulating mat

[0052] 60: Electronic devices

[0053] 62: Panel

[0054] 62a: Magnetic suction part

[0055] 64, 64a, 64b, 64c: Frame bars

[0056] 66: Opening

[0057] 662: First Opening

[0058] 662a: Wall

[0059] 664: Second opening

[0060] 664a: Wall

[0061] 666: The third opening

[0062] 68: Device circuit board

[0063] 68a: Surface

[0064] 70: Connecting pad

[0065] 72: Fixed base

[0066] 722: Side Groove

[0067] 722a: Restricted Surface

[0068] 74: Assembly frame

[0069] 742: Second landing section

[0070] 76: Assembly frame

[0071] 78: Connecting parts

[0072] 782: Magnet

[0073] 80: Extension

[0074] 82: Assembly frame

[0075] 84: Connecting parts

[0076] 842: Elastic buckle

[0077] 86: Extension

[0078] 88: Assembly frame

[0079] 882: Second landing section

[0080] 884: Extension

[0081] 884a: Guide groove

[0082] 90: Spring

[0083] D1: First Direction

[0084] D2: Second Direction

[0085] Di: Insertion direction

[0086] P1: Unlock Location

[0087] P2: Lock position

[0088] Y: Axial direction Detailed Implementation

[0089] To more clearly illustrate this utility model, preferred embodiments are described in detail below with reference to the accompanying drawings. Please refer to... Figures 1 to 7 The diagram shows an electrical signal transmission device 1 according to a first preferred embodiment of the present invention. It is detachably connected to an electronic device 60 and transmits the electrical signals of the electronic device 60 to the outside for further analysis or monitoring. The electronic device 60 may be, for example, a network interface card, but is not limited thereto; it may also be other interface cards, processing cards, or a computing host. The electronic device 60 includes a panel 62 and a device circuit board 68.

[0090] In this embodiment, the panel 62 includes a plurality of frame strips 64, which are crisscrossed to form a plurality of openings 66 for airflow. The plurality of openings 66 include at least one first opening 662, at least one second opening 664, and one third opening 666. In this embodiment, two first openings 662 and two second openings 664 are used as an example. A device circuit board 68 is located on one side of the panel 62, and an electrical signal transmission device 1 is attached to the panel 62 from the other side. A surface 68a of the device circuit board 68 has at least one pad 70. In this embodiment, there are multiple pads 70, each used to electrically connect electronic components or wires of the device circuit board 68 to transmit electrical signals from the electronic components or wires. The multiple pads 70 are located on one side of two first openings 662. Each pad 70 faces a first direction D1, which is, for example, perpendicular to the surface 68a of the device circuit board 68. Each second opening 664 is spaced apart from each first opening 662 in the first direction D1.

[0091] The signal transmission device 1 includes a circuit board 10, at least one pin 20, a connector 22, and a mounting bracket 24. The circuit board 10 has a first surface 10a and a second surface 10b, with the second surface 10b facing away from the first surface 10a. The circuit board 10 includes an insertion section 12 and an outer section 18. The insertion section 12 is used to insert into at least one first opening 662 of the panel 62 of the electronic device 60. In this embodiment, the insertion section 12 is forked and has two parallel branch plates 14, with a slot 16 between the two branch plates 14. The two parallel branch plates 14 are used to insert into two first openings 662, and the slot 16 accommodates a frame strip 64a between the two first openings 662. The insertion section 12 has at least one end 142; in this embodiment, each branch plate 14 has one end 142. The outer segment 18 of the circuit board 10 has a positioning hole 182 that penetrates the first surface 10a and the second surface 10b. The positioning hole 182 is a non-circular hole, for example, a rectangular hole.

[0092] At least one pin 20 is disposed in the insertion section 12 of the circuit board 10 and located on the first surface 10a. In this embodiment, there are multiple pins 20, each used to contact the multiple pads 70 to form an electrical connection. Each pin 20 is elastic, for example, a pogo pin, but not limited thereto, and can also be a fixed pin. The multiple pins 20 are respectively located on two branch plates 14, for example, two pins 20 are disposed on each branch plate 14.

[0093] The connector 22 is disposed on the outer segment 18 of the circuit board 10 and electrically connected to the plurality of pins 20. In this embodiment, the connector 22 is an example of a USB type-C connector, but it is not limited thereto and may be other types of connectors. The connector 22 is located at one end of the outer segment 18 and is electrically connected to the plurality of pins 20 through one or more wires (not shown) on the circuit board 10.

[0094] The mounting bracket 24 includes a base 26, at least one first abutment portion 28, and a mounting portion 30. The base 26 is attached to the outer segment 18 of the circuit board 10. At least a portion of the first abutment portion 28 corresponds to the insertion segment 12 of the circuit board 10 and faces away from the second surface 10b. The mounting portion 30 is spaced apart from the first abutment portion 28 in the first direction D1. In this embodiment, the base 26 is located between the connector 22 and the insertion segment 12 and corresponds to the second surface 10b. The base 26 has a positioning protrusion 262, the shape of which matches the shape of the positioning hole 182 of the circuit board 10 to prevent the mounting bracket 24 from rotating. The positioning protrusion 262 may be, for example, a rectangular body. The positioning protrusion 262 extends into the positioning hole 182 of the circuit board 10 to position the base 26. The base 26 has multiple screw holes 264, and the outer segment 18 of the circuit board 10 has multiple through holes 184. Multiple bolts 48 pass through the through holes 184 and are locked into the corresponding screw holes 264 to fix the base 26 to the outer segment 18 of the circuit board 10. Optionally, an insulating pad 50 can be provided between the base 26 and the second surface 10b of the circuit board 10 to protect the second surface 10b of the circuit board 10. Two first abutment portions 28 are connected to one side of the base 26 and correspond to the two branch plates 14 of the insertion segment 12.

[0095] The connecting frame 24 also includes at least one inclined surface 32, at least one guide plate 34, at least one folding plate 36, and at least one end abutment 38. In this embodiment, the number of each of the at least one inclined surface 32, at least one guide plate 34, at least one folding plate 36, and at least one end abutment 38 is two, corresponding to two branch plates 14. Each inclined surface 32 connects to each first abutment portion 28, and each inclined surface 32 is inclined towards the second surface 10b from each first abutment portion 28 toward the end 142 of each branch plate 14. Each guide plate 34 covers the second surface 10b of each branch plate 14 located in the insertion section 12, and each inclined surface 32 connects between each first abutment portion 28 and each guide plate 34. Each folding plate 36 connects to each guide plate 34 and covers the end 142 of each branch plate 14 in the insertion section 12. Each end plate 38 is connected to each folding plate 36, and each folding plate 36 is located between each end plate 38 and each end 142 of the insertion section 12. Each end plate 38 has an abutment surface 382 facing the first direction D1.

[0096] The connecting frame 24 also includes an extension 40 and at least one second abutment 42. One end of the extension 40 is connected to the base 26 and extends along the first direction D1. The connecting portion 30 connects to the extension 40. There are at least two second abutment portions 42. Each second abutment portion 42 is connected to the extension 40 and spaced apart from the first abutment portion 28 in the first direction D1. Each second abutment portion 42 faces each first abutment portion 28. Each second abutment portion 42 is used to extend into each second opening 664.

[0097] More specifically, the connecting frame 24 includes a frame body 44 and a connecting member 46. The frame body 44 has a base 26, two first abutting portions 28, an extension 40, and two second abutting portions 42. The connecting member 46 is connected to the extension 40 of the frame body 44 and has a connecting portion 30. In this embodiment, the connecting member 46 includes an operating button 462 and a connecting portion 30, for example, a hook 464. The hook 464 is T-shaped and is used to extend into a third opening 666. The operating button 462 is coupled to the hook 464 and is used for user operation to move the hook 464 to an unlocked position P1. Figure 1 (Refer to) and a locked position P2 ( Figure 7 (Refer to) Movement. The coupling 46 is a quarter lock with an automatic locking function. When the hook 464 is in the unlocked position P1, pressing the operation button 462 will cause the hook 464 to extend and rotate a quarter turn to the locked position P2; then, rotating the operation button 462 will cause the hook 464 to reverse a quarter turn and retract back to the unlocked position P1. In one embodiment, the frame 44 and the coupling 46 may also be integrally connected, not limited to being detachably connected.

[0098] Please cooperate. Figure 5 When the user wishes to connect the signal transmission device 1 to the electronic device 60, the user can hold the signal transmission device 1 and insert it into each of the first openings 662 starting from the end plates 38 along an insertion direction Di. During insertion, each folding plate 36 can protect the end 142 of the circuit board 10 from impact; then, each guide plate 34 abuts against a wall 662a of each of the first openings 662, which not only guides the insertion but also protects the insertion section 12 of the circuit board 10 from impact.

[0099] Continued reference Figure 6 As the signal transmission device 1 continues to move along the insertion direction Di, each inclined surface 32 abuts against the wall surface 662a of each first opening 662, and the connecting frame 24 gradually moves toward a second direction D2 opposite to the first direction D1 and gradually applies force to the plurality of pins 20.

[0100] Continued reference Figure 4 When the signal transmission device 1 moves along the insertion direction Di to its positioning and is coupled to the electronic device 60, the coupling bracket 24 rests against the panel 62 and the circuit board 10 is inserted into the first opening 662 of the panel 62. The wall surface 662a of the first opening 662 abuts against the first abutting part 28 in the second direction D2 and applies force in the second direction D2, so that each pin 20 abuts against each pad 70 in the second direction D2. Thus, the plurality of pins 20 stably contact the plurality of pads 70 to form an electrical connection. Each second abutting part 42 abuts against a wall surface 664a of each second opening 664 in the second direction D2 to enhance the stability of the coupling bracket 24 coupled to the panel 62.

[0101] Furthermore, the electronic device 60 may also include a mounting base 72, which is attached to the device circuit board 68 and has a side groove 722 facing two first openings 662, and a limiting surface 722a facing a second direction D2. The two end plates 38 of the mounting bracket 24 extend into the side groove 722, thereby applying force in the second direction D2 to the plurality of pins 20 when the abutting surfaces 382 of the two end plates 38 contact the limiting surface 722a of the side groove 722, thereby enhancing the stability of the pins 20 against the pads 70.

[0102] Continued reference Figure 7 When the user presses the operation button 462, the hook 464 extends into the third opening and rotates a quarter turn to the locked position P2. At this time, the hook 464 is fastened around the third opening 666, that is, the T-shaped part of the hook 464 is fastened to the two frame strips 64b around the third opening 666. Thus, the electrical signal transmission device 1 can be stably connected to the electronic device 60. In this way, the user can lead out the electrical signals of the plurality of pads 70 through the connector 22 for further analysis or monitoring.

[0103] After use, the user can rotate the operation button 462 to cause the hook 464 to reverse a quarter turn and retract to the unlocked position P1 to disengage from the panel 62, thus detaching the signal transmission device 1 from the panel 62 of the electronic device 60.

[0104] Figure 8 The diagram shows a second preferred embodiment of the electrical signal transmission device 2 of this utility model, which has a structure substantially the same as that of the first embodiment. The difference is that the second abutment portions 742 of the connecting frame 74 are adjacent to the first abutment portions 28 in the first direction D1, and the second opening 664 on the panel 62 is adjacent to the first opening 662 in the first direction D1. When the connecting frame 74 rests against the panel 62, the second abutment portions 742 and the first abutment portions 28 abut against both sides of a frame strip 64c, thereby enhancing the stability of the connecting frame 74 attached to the panel 62.

[0105] Figure 9The diagram shows a third preferred embodiment of the electrical signal transmission device 3 of this invention. It has a structure largely the same as the first embodiment, except that the connecting member 78 of the connecting frame 76 in this embodiment includes a connecting portion, for example, with at least one magnet 782; or, for example, with two magnets 782, the two magnets 782 are connected to the extension portion 80. The panel 62 of the electronic device 60 is made of a magnetically attractive material, such as iron. The panel 62 has at least one magnetic attraction portion 62a; for example, the frame strips 64b located on both sides of the third opening 666 constitute two magnetic attraction portions 62a. When the electrical signal transmission device 3 is connected to the electronic device 60, each magnet 782 is attracted to its respective magnetic attraction portion 62a, causing the connecting frame 76 to connect to the panel 62. Applying force in a direction opposite to the insertion direction Di disengages each magnet 782 from its respective magnetic attraction portion 62a, thus allowing the electrical signal transmission device 3 to be removed.

[0106] Figure 10 The diagram shows a fourth preferred embodiment of the electrical signal transmission device 4 of this utility model, which has a structure substantially the same as that of the first embodiment. The difference is that the connecting member 84 of the connecting frame 82 in this embodiment includes a connecting portion, for example, at least one elastic buckle 842; for example, two elastic buckles 842 are connected to the extension portion 86. When the electrical signal transmission device 4 is connected to the electronic device 60, the two elastic buckles 842 pass through the third opening 666 and fasten around the third opening 666, causing the connecting frame 82 to connect to the panel 62. Applying force in a direction opposite to the insertion direction Di will disengage the elastic buckles 842 from the third opening 666, allowing the electrical signal transmission device 4 to be removed.

[0107] Figure 11 The diagram shows a fifth preferred embodiment of the electrical signal transmission device 5 of this utility model, which has a structure substantially the same as that of the first embodiment. The difference is that in this embodiment, the second abutment portion 882 of the connecting frame 88 is disposed in the extension portion 884 and can move along an axial direction Y formed by the first direction D1 and the second direction D2. More specifically, the extension portion 884 has a guide groove 884a that extends along the axial direction Y. The second abutment portion 882 is disposed in the guide groove 884a and can be displaced along the first direction D1 or the second direction D2. An elastic element, such as a spring 90, is disposed in the guide groove 884a. The spring 90 abuts against the second abutment portion 882 and provides a resisting force along the second direction D2 on the second abutment portion 882. This increases the force of the second abutment portion 882 against the wall surface 664a of the second opening 664, allowing the connecting frame 88 to be more stably connected to the panel 62. More notably, since the second abutment portion 882 can be displaced along the first direction D1 or the second direction D2 to change the distance relative to the first abutment portion 28, the connecting frame 88 can be adapted to panels 62 with second openings 664 of different sizes.

[0108] The above description is only a preferred and feasible embodiment of this utility model. Any equivalent changes made by applying the specification and claims of this utility model should be included within the patent scope of this utility model.

Claims

1. An electrical signal transmission device, characterized in that, The device is detachably coupled to an electronic device, the electronic device including a panel and a device circuit board, the panel having a first opening, the device circuit board located on one side of the panel, the device circuit board having at least one pad located on one side of the first opening, the at least one pad facing a first direction; the electrical signal transmission device includes: A circuit board having a first surface and a second surface facing away from each other, the circuit board including an insertion section and an outer section; At least one pin is disposed in the insertion segment of the circuit board and located on the first surface; A connector, disposed on the outer segment of the circuit board and electrically connected to at least one pin; and A mounting bracket includes a base, a first abutment portion, and a mounting portion, wherein the base is coupled to the outer segment of the circuit board, at least a portion of the first abutment portion corresponds to the insertion segment of the circuit board and faces away from the first surface of the circuit board; the mounting portion is spaced apart from the first abutment portion in the first direction. When the signal transmission device is connected to the electronic device, the circuit board is inserted into the first opening of the panel of the electronic device, a wall of the first opening abuts against the first abutment in a second direction opposite to the first direction, such that the at least one pin abuts against the at least one pad in the second direction, and the connecting portion of the connecting bracket is detachably connected to the panel.

2. The electrical signal transmission device as claimed in claim 1, wherein, The insertion segment of the circuit board has an end; the connecting frame includes a ramp and a guide plate, the ramp is connected to the first abutment, and the ramp is inclined toward the second surface from the first abutment toward the end, the guide plate covers the second surface located on the insertion segment, and the ramp is connected between the first abutment and the guide plate.

3. The electrical signal transmission device as described in claim 2, wherein, The connecting frame includes a folding plate and an end abutment plate, which are connected to the guide plate and cover the end of the insertion segment. The end abutment plate is connected to the folding plate and is located between the end abutment plate and the end of the insertion segment. The end abutment plate has an abutment surface facing the first direction.

4. The electrical signal transmission device as claimed in claim 1, wherein, The mounting bracket includes an extension that connects to the base and extends along the first direction, and the mounting bracket connects to the extension; the panel has a second opening that is spaced apart from the first opening in the first direction; wherein the mounting bracket includes a second abutment that is disposed on the extension and spaced apart from the first abutment in the first direction; when the signal transmission device is attached to the electronic device, the second abutment abuts against a wall of the second opening in the second direction; the first direction and the second direction form an axial direction, and the second abutment is movably disposed on the extension along the axial direction.

5. The electrical signal transmission device as described in claim 4, wherein, The extension has a guide groove that extends along the axial direction, and the second abutting portion is disposed in the guide groove and can be displaced along the first direction or the second direction; an elastic member is disposed in the guide groove, and the elastic member abuts against the second abutting portion and provides a resisting force on the second abutting portion along the second direction.

6. The electrical signal transmission apparatus as claimed in claim 1, wherein, The connecting frame includes an extension portion connected to the base portion and extending along the first direction, and the connecting portion is connected to the extension portion; the connecting frame includes a frame body and a connecting member, the frame body having the base portion, the first abutting portion and the extension portion; the connecting member is connected to the extension portion of the frame body and has the connecting portion.

7. The electrical signal transmission apparatus as claimed in claim 6, wherein, The panel has a third opening; the connector includes an operating button and a hook, the hook forming the connector portion; the operating button is operated by a user to move the hook between a locked position and an unlocked position; when the signal transmission device is connected to the electronic device, the hook is in the locked position and fastened around the third opening.

8. The electrical signal transmission apparatus as claimed in claim 6, wherein, The panel has a magnetic attraction portion; the connector includes a magnet, which constitutes the connector portion; when the signal transmission device is connected to the electronic device, the magnet is attracted to the magnetic attraction portion.

9. The electrical signal transmission apparatus as claimed in claim 6, wherein, The panel has a third opening; wherein the connector includes a snap fastener that forms the connector portion; when the signal transmission device is connected to the electronic device, the snap fastener is fastened around the third opening.

10. The electrical signal transmission apparatus as claimed in claim 1, wherein, The outer segment of the circuit board has a positioning hole, and the base of the mounting bracket has a positioning protrusion that extends into the positioning hole.

11. The electrical signal transmission apparatus as claimed in claim 1, wherein, The insertion section of the circuit board includes two branch boards with a slot between them; the number of the at least one pin is multiple and they are located on the two branch boards respectively.