substrate bonding device

Abstract

To provide a circuit board joining device that can improve the workability of joining circuit boards. [Solution] A substrate connecting device 10 connects a first substrate 11 and a second substrate 12 arranged along a direction intersecting the first substrate 11. The substrate connecting device 10 includes a plug terminal 15 and a socket terminal 16. The plug terminal 15 has a plug connection fixing part 20 that is connected and fixed to the first substrate 11, and a plug part 21 that rises from the plug connection fixing part 20 and protrudes from the first substrate 11. The socket terminal 16 has a socket connection fixing part 50 that is connected and fixed to the second substrate 12, a socket part 51 that rises from the socket connection fixing part 50 and protrudes from the second substrate 12, and a socket opening 52 that opens to the socket connection fixing part 20 and the socket part 51 in a direction along the second substrate 12. The socket part 51 contacts the plug part 21 inserted into the socket opening 52 and connects them.

Description

Technical Field

[0001] The present invention relates to a substrate connection device capable of improving the workability of connecting substrates.

Background Art

[0002] Conventionally, as described in Patent Document 1 below, for example, a substrate connection device that connects a first substrate and a second substrate arranged along a direction intersecting the first substrate is known.

[0003] In such a substrate connection device, a screw connection structure that connects the first substrate and the second substrate by combining a first terminal connected and fixed to the first substrate and a second terminal connected and fixed to the second substrate and tightening and fixing them with screws is often used.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the above-described substrate connection device, a screw connection structure is used, but an operation of positioning and tightening the screws on the terminals is required, and the connection of the substrates is troublesome.

[0006] The problem to be solved by the present invention is to provide a substrate connection device capable of improving the workability of connecting substrates.

Means for Solving the Problems

[0007] The present invention relates to a substrate connecting device for connecting a first substrate and a second substrate arranged in a direction intersecting the first substrate, comprising: a plug terminal having a plug connection fixing portion connected and fixed to the first substrate, and a plug portion rising from the plug connection fixing portion and protruding from the first substrate; and a socket connection fixing portion connected and fixed to the second substrate, a socket portion rising from the socket connection fixing portion and protruding from the second substrate, and a socket terminal having a socket opening opened in the socket connection fixing portion and the socket portion in a direction along the second substrate, wherein the socket portion contacts and connects to the plug portion inserted into the socket opening. [Effects of the Invention]

[0008] According to the present invention, the workability of connecting substrates can be improved. [Brief explanation of the drawing]

[0009] [Figure 1] This shows one embodiment of the present invention, where (a) is a perspective view of the connection process of the substrate connecting device and (b) is a perspective view of the connected state of the substrate connecting device. [Figure 2] This is a perspective view showing an example of the use of the same substrate coupling device. [Figure 3] This is a perspective view of the plug terminals and socket terminals of the same circuit board connecting device. [Figure 4] This is a perspective view of the plug terminals and socket terminals of the same circuit board connecting device. [Figure 5] (a) above is a front view of the plug terminal, (b) is a top view of the plug terminal, (c) is a bottom view of the plug terminal, (d) is a right side view of the plug terminal, and (e) is a rear view of the plug terminal. [Figure 6] (a) above is a front view of the socket terminal, (b) is a top view of the socket terminal, (c) is a right side view of the socket terminal, and (d) is a rear view of the socket terminal. [Figure 7] (a), (b), and (c) are side views showing the coupling operation of the same substrate coupling device in that order. [Figure 8](a) above is a cross-sectional view of the plug terminal, and (b) is a cross-sectional view of the plug terminal connected to the socket terminal. [Figure 9] This is a side view showing the misaligned and incorrectly inserted socket terminals of the same substrate connecting device. [Figure 10] This is a side view showing the reversed insertion state of the socket terminals of the same board connecting device. [Figure 11] This is a perspective view showing a modified example of the plug terminal of the same substrate connecting device. [Modes for carrying out the invention]

[0010] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

[0011] Figure 1 shows a substrate connecting device 10. The substrate connecting device 10 connects a first substrate 11 to a second substrate 12 that is positioned along a direction intersecting the first substrate 11. The connection between the first substrate 11 and the second substrate 12 by the substrate connecting device 10 includes both electrical and mechanical connections. As shown in Figure 2, multiple substrate connecting devices 10 may be used to connect the first substrate 11 and the second substrate 12, making it possible to perform multiple electrical connections between the first substrate 11 and the second substrate 12, or to perform a stable mechanical connection between the first substrate 11 and the second substrate 12.

[0012] The first substrate 11 is a flat printed circuit board, with one substrate surface 11a being a mounting surface for mounting electrical components with leads, and the other substrate surface 11b being a wiring pattern surface with wiring patterns formed for soldering the leads of the electrical components. Similarly, the second substrate 12 also has a substrate surface 12a which is a mounting surface and a substrate surface 12b which is a wiring pattern surface. In this embodiment, the first substrate 11 is a master substrate, and the second substrate 12 is an expansion substrate, and the second substrate 12 is electrically connected to the first substrate 11.

[0013] In this embodiment, the first substrate 11 is arranged in a horizontal posture in which the substrate surface 11a is horizontal, and the second substrate 12 is arranged in a vertical posture in which the substrate surface 12a is perpendicular to the substrate surface 11a of the first substrate 11. Also, hereinafter, each direction of the arrow shown in FIG. 1 will be described as front, rear, left, and right.

[0014] The substrate connecting device 10 includes a plug terminal 15 disposed on the first substrate 11 and a socket terminal 16 disposed on the second substrate 12, and combines the plug terminal 15 and the socket terminal 16 to connect the first substrate 11 and the second substrate 12.

[0015] The plug terminal 15 is shown in FIGS. 1 to 5. The plug terminal 15 is integrally formed by press-forming and bending a single metal plate having conductivity, such as phosphor bronze. The plug terminal 15 has a plug connection fixing portion 20 connected and fixed to the first substrate 11, and a plug portion 21 and a guide portion 22 that rise from the plug connection fixing portion 20 and protrude upward from the substrate surface 11a of the first substrate 11.

[0016] The plug connection fixing portion 20 has a base portion 23 disposed on the substrate surface 11a of the first substrate 11, and a plurality of leg portions 24 protruding downward from the base portion 23 and penetrating and fixed to the first substrate 11. The base portion 23 is formed in a substantially U-shaped cross-section having a pair of left and right first base portions 25 disposed opposite to each other, and a second base portion 26 disposed on the front side, which is one side surface intersecting the opposing direction of the pair of first base portions 25. The leg portions 24 protrude downward from two front and rear locations at the lower part of the pair of first base portions 25, and are respectively inserted and locked into corresponding holes 11c provided in the first substrate 11. At least some of the leg portions 24 are soldered to the wiring pattern on the substrate surface 11b of the first substrate 11 and electrically connected.

[0017] The plug portion 21 has a pair of first plug terminal portions 27 that rise from a pair of first base portions 25 of the plug connection fixing portion 20 and are arranged to face each other, and a second plug terminal portion 28 that rises from the second base portion 26 of the plug connection fixing portion 20 and is arranged on the front side, which is a side surface that intersects the facing direction of the pair of first plug terminal portions 27.

[0018] On the pair of first plug terminal portions 27, a contact portion 29 that inclines so as to protrude outward in the left-right direction from the outer surfaces in the left-right direction of the first base portion 25 upward from the first base portion 25 is extended. From the upper end side of this contact portion 29 upward, an introduction portion 30 that inclines so that the tip sides of the pair of first plug terminal portions 27 approach each other is extended. From the upper end side of this introduction portion 30 upward, a tip portion 31 that protrudes is extended. And in the unconnected state of the plug terminal 15 not combined with the socket terminal 16, the contact portions 29 of the pair of first plug terminal portions 27 protrude while inclining outward in the left-right direction, and the tip portions 31 of the pair of first plug terminal portions 27 are separated from each other.

[0019] On the second plug terminal portion 28, a contact portion 32 that inclines so as to protrude forward from the front surface of the second base portion 26 upward from the second base portion 26 is extended. From the upper end side of this contact portion 32 upward, an introduction portion 33 that inclines so as to approach the first plug terminal portion 27 is extended. From the upper end side of this introduction portion 33 upward, a tip portion 34 that protrudes is extended. And in the unconnected state of the plug terminal 15 not combined with the socket terminal 16, the contact portion 32 of the second plug terminal portion 28 protrudes while inclining forward, and the tip portion 34 is separated from the pair of first plug terminal portions 27, and the upper end of the tip portion 34 is arranged at substantially the same height position as the upper end of the tip portion 31 of the first plug terminal portion 27.

[0020] The plug portion 21 is provided with a recessed-recessed fitting structure 35 that allows the plug terminal 15 and the socket terminal 16 to be removably fitted together when assembled in a predetermined connection position. The recessed-recessed fitting structure 35 provided on the plug portion 21 consists of a circular protrusion 36 that protrudes from the front surface of the contact portion 32 of the second plug terminal portion 28. The protrusion dimension of the protrusion 36 from the front surface of the contact portion 32 is smaller than the plate thickness dimension of the contact portion 32.

[0021] The guide sections 22 are a pair, one on the left and one on the right, and are positioned opposite each other, rising from the upper rear end of the pair of first base sections 25 of the plug connection fixing section 20, on the side opposite to the second plug terminal section 28 of the plug section 21, and facing each other.

[0022] Each pair of guide sections 22 has a rising section 37 extending upward parallel from the first base section 25. A bulge 38 is provided from the upper end of the rising section 37, projecting outward in the left-right direction from the pair of guide sections 22. An introduction section 39 extends upward from the bulge 38, inclined so that the tips of the pair of guide sections 22 approach each other. A butt joint 40 is provided from the tip of the introduction section so that the pair of guide sections 22 contact or are in close proximity to each other. The upper ends of the pair of guide sections 22 are positioned at a lower height than the upper end of the first plug terminal section 27. A portion of the bulge 38 is positioned at the same height as the upper end of the contact section 32 of the first plug terminal section 27.

[0023] On the rear side of the pair of guide portions 22, there are second substrate contact portions 41 that contact the substrate surface 12a of the second substrate 12. The second substrate contact portions 41 are provided at multiple locations in the vertical direction of the rising portion 37 and on the bulging portion 38. On the front side of the rising portion 37 of the pair of guide portions 22, there are stopper portions 42 that protrude to restrict the descent of the socket terminal 16, which is combined with the plug terminal 15 from above, to a predetermined connection position, and a holding guide portion 43 protrudes above the stopper portion 42.

[0024] Furthermore, as shown in Figures 1 to 4 and Figure 6, the socket terminal 16 is integrally formed by press forming and bending a single conductive metal plate, such as brass. The socket terminal 16 has a socket connection fixing portion 50 that is connected and fixed to the second substrate 12, a socket portion 51 that rises from the socket connection fixing portion 50 and protrudes from the substrate surface 12a of the second substrate 12, a socket opening 52 that is opened across the socket connection fixing portion 50 and the socket portion 51 in a direction along the substrate surface 12a of the second substrate 12, and a holding portion 53 that protrudes from the socket portion 51 to the socket opening 52 and holds a guide portion 22 that is inserted into the socket opening 52 by sandwiching it between itself and the second substrate 12.

[0025] The socket connection fixing part 50 has a base part 54 positioned on the substrate surface 12a of the second substrate 12, and a plurality of legs 55 that protrude rearward from the base part 54 and penetrate the second substrate 12 for fixing. The base part 54 protrudes rearward from two locations, upper and lower, on both sides in the left-right direction of the socket part 51. The legs 55 protrude rearward from the rear end of each base part 54 and are inserted into and locked into corresponding holes 12c provided in the second substrate 12. At least some of the legs 55 are electrically connected by soldering to the wiring pattern on the substrate surface 12b of the second substrate 12.

[0026] The socket portion 51 has a pair of first socket terminal portions 57 that protrude forward so as to rise from the socket connection fixing portion 50, and a front-side second socket terminal portion 58 provided between the tips of the pair of first socket terminal portions 57. The pair of first socket terminal portions 57 contact the pair of first plug terminal portions 27 of the plug portion 21 inserted into the socket opening 52 of the socket portion 51, and the second socket terminal portion 58 contacts the second plug terminal portion 28.

[0027] The socket portion 51 is provided with a recessed-recessed fitting structure 35 that allows the plug terminal 15 and the socket terminal 16 to be removably fitted together when assembled in a predetermined connection position. The recessed-recessed fitting structure 35 of the socket portion 51 is provided with a circular recess 59 in the second socket terminal portion 58 into which the convex portion 36 of the first plug terminal portion 27 fits. In this embodiment, the recess 59 is composed of a hole that penetrates the second socket terminal portion 58, but it may also be composed of a recess on the inner surface side of the second socket terminal portion 58 that contacts the second plug terminal portion 28. In addition, the recessed-recessed fitting structure 35 may be provided with the recess 59 on the plug portion 21 side and the convex portion 36 on the socket portion 51 side.

[0028] The socket opening 52 is located between the left and right base portions 54 and the left and right first socket terminal portions 57 and the front second socket terminal portion 58, and is opened in the vertical direction along the substrate surface 12a of the second substrate 12. The socket opening 52 is divided into two parts, front and back, by a retaining portion 53 that protrudes into the socket opening 52. The socket opening 52 has a front plug portion insertion opening 60 into which the plug portion 21 is inserted, and a rear guide portion insertion opening 61 into which the guide portion 22 is inserted.

[0029] The retaining portion 53 is bent from the rear ends of the pair of first socket terminal portions 57 so as to face each other and is positioned to protrude into the socket opening 52.

[0030] Next, the dimensional relationship between the plug terminal 15 and the socket terminal 16 in the unconnected state will be explained with reference to Figures 5 and 6.

[0031] The distance L1 between the second socket terminal portion 58 and the holding portion 53 in the front-rear direction is the same as the distance L2 from the front side of the pair of first plug terminal portions 27 facing the second plug terminal portion 28 to the guide portion 22. Note that the distance L2 to the guide portion 22 is within the front-rear range of the tip surface of the guide portion 22, and in Figure 5(d), the distance L2 is shown as being in the center of the front-rear range of the tip surface of the guide portion 22.

[0032] The distance L1 between the second socket terminal portion 58 and the holding portion 53 in the front-rear direction is the same as the distance L3 between the second substrate contact portion 41 on the opposite side of the plug portion 21 of the guide portion 22 and the pair of first plug terminal portions 28. The distance L3 to the pair of first plug terminal portions 28 is within the front-rear range of the tip surfaces of the pair of first plug terminal portions 27, and in Figure 5(d), the distance L3 is shown as being in the center of the front-rear range of the tip surfaces of the pair of first plug terminal portions 27.

[0033] The maximum distance L4 between the contact portion 32 of the second plug terminal portion 28 and the second substrate contact portion 41 of the guide portion 22 is greater than the distance L5 between the second socket terminal portion 58 and the rear end of the base portion 54 (between the base portion 54 and the leg portion 55).

[0034] The distance L6 between the second substrate contact portion 41 of the guide portion 22 and the holding guide portion 43 is approximately the same as the distance L7 between the holding portion 53 and the rear end of the base portion 54 (between the base portion 54 and the leg portion 55).

[0035] The maximum distance W1 between the outer surfaces of the contact portions 29 of the pair of first plug terminal portions 27 is greater than the distance W2 between the opposing pairs of first socket terminal portions 57.

[0036] The maximum distance W3 between the outer surfaces of the bulging portions 38 of the pair of guide portions 22 is slightly smaller than the distance W2 between the left and right base portions 54 facing each other.

[0037] Next, the operation of connecting the first substrate 11 and the second substrate 12 by the substrate connecting device 10 will be explained.

[0038] As shown in Figure 7(a), the plug terminal 15 is electrically and mechanically connected to the first board 11, and the socket terminal 16 is electrically and mechanically connected to the second board 12, while the coupling operation between the first board 11 and the second board 12 is performed.

[0039] The socket terminal 16 is positioned so that the second socket terminal portion 58 of the socket terminal 16 is on the side of the second plug terminal portion 28 of the plug terminal 15, and the second substrate 12 to which the socket terminal 16 is connected and fixed is oriented so that the second substrate contact portion 41 of the guide portion 22 is on the side of the plug terminal 15. The socket terminal 16 is then assembled from above the plug terminal 15 so that the plug terminal 15 is inserted into the socket opening 52 of the socket terminal 16.

[0040] As shown in Figures 7(b) and 1(a), the upper ends of the plug portion 21 and the guide portion 22 are inserted into the socket opening 52 of the socket terminal 16, the second socket terminal portion 58 is placed against the introduction portion 33 of the second plug terminal portion 28, and the socket terminal 16 is pushed downward toward the plug terminal 15. As a result, the substrate surface 12a of the second substrate 12 to which the socket terminal 16 is connected and fixed moves in a direction (to the left in Figure 7(b)) toward the second substrate contact portion 41 of the guide portion 22, and the second plug terminal portion 28 is inserted inside the second socket terminal portion 58 while elastically deforming. Similarly, the pair of first socket terminal portions 57 come into contact with the introduction portions 30 of the pair of first plug terminal portions 27, and the pair of first socket terminal portions 57 are inserted inside the pair of first plug terminal portions 27 while elastically deforming.

[0041] In this way, the plug portion 21 and guide portion 22 of the plug terminal 15 are inserted into the socket opening 52 of the socket terminal 16. At this time, the plug portion 21 is inserted into the plug portion insertion opening 60 in front of the retaining portion 53 of the socket terminal 16, and the guide portion 22 is inserted into the guide portion insertion opening 61 in rear of the retaining portion 53.

[0042] As shown in Figures 7(c) and 1(b), the retaining portion 53 of the socket terminal 16 contacts the stopper portion 42 of the plug terminal 15, thereby restricting the downward pushing of the socket terminal 16 to a predetermined connection position. Immediately before or simultaneously with this, the recess 59 of the second socket terminal portion 58 fits into the protrusion 36 of the second plug terminal portion 28, providing the operator performing the connection work with a click sensation and allowing them to recognize that it has been inserted to the predetermined connection position.

[0043] When the plug terminal 15 and the socket terminal 16 are connected, the left and right bulging portions 38 of the guide portion 22 are inserted between the left and right base portions 54 of the socket terminal 16, thereby positioning and maintaining the left-right position of the plug terminal 15 and the socket terminal 16. The holding portion 53 of the socket terminal 16 rides up on the front side of the holding guide portion 43 of the guide portion 22, sandwiching the guide portion 22 between the holding portion 53 and the substrate surface 12a of the second substrate 12, thereby positioning and maintaining the front-rear position of the plug terminal 15 and the socket terminal 16.

[0044] The elasticity of the pair of first plug terminals 27 causes the contact portion 29 to press against the pair of first socket terminals 57. At this time, as shown in Figure 8, when the plug terminals 15 are not connected to the socket terminals 16, the tips 31 of the pair of first socket terminals 57 are separated from each other. However, when combined with the socket terminals 16, the tips 31 of the pair of first socket terminals 57 come into contact with each other and brace against each other, so the pressure force on the contact portion 29 of the pair of first plug terminals 27 against the pair of first socket terminals 57 increases. In addition, the elasticity of the second plug terminal 28 causes the contact portion 32 to press against the second socket terminal 58. At this time, in the unconnected state of the plug terminal 15 that is not combined with the socket terminal 16, the tip 34 of the second socket terminal 58 is separated from the first plug terminal 27. However, when combined with the socket terminal 16, the tip 34 of the second socket terminal 58 comes into contact with the first plug terminal 27 and braces itself to restrict deformation, thereby increasing the pressure force with which the contact portion 32 of the second plug terminal 28 presses against the second socket terminal 58. In this way, the electrical and mechanical connection between the plug terminal 15 and the socket terminal 16 is reliably established.

[0045] Furthermore, to disconnect the connection between the first board 11 and the second board 12, the second board 12 is moved upward relative to the first board 11, thereby disengaging the socket terminal 16 from the plug terminal 15 and releasing the connection.

[0046] Furthermore, as shown in Figure 9, when combining the plug terminal 15 and the socket terminal 16, there is a possibility of misalignment and incorrect insertion occurring, where the second socket terminal portion 58 is inserted between the first plug terminal portion 27 and the second plug terminal portion 28 instead of being inserted into the front side of the second plug terminal portion 28. However, since the distance L1 (shown in Figure 6) between the second socket terminal portion 58 and the holding portion 53 in the front-to-back direction is the same as the distance L2 (shown in Figure 5) from the front side of the pair of first plug terminal portions 27 facing the second plug terminal portion 28 to the guide portion 22, the holding portion 53 comes into contact with the tip of the guide portion 22, preventing further combination and thus preventing misalignment and incorrect insertion.

[0047] Furthermore, as shown in Figure 10, the second socket terminal portion 58 of the socket terminal 16 is positioned on the side of the second substrate contact portion 41 of the guide portion 22 of the plug terminal 15, and the substrate surface 12a of the second substrate 12 to which the socket terminal 16 is connected and fixed is on the front side of the second plug terminal portion 28. Although there is a risk of incorrect insertion in the reverse direction, the distance L1 between the second socket terminal portion 58 and the holding portion 53 in the front-to-back direction is the same as the distance L3 (shown in Figure 5) between the second substrate contact portion 41 of the guide portion 22 and the first plug terminal portion 27. As a result, the holding portion 53 comes into contact with the tip of the first plug terminal portion 27, preventing further assembly and thus preventing incorrect insertion in the reverse direction.

[0048] As described above, the board connecting device 10 of this embodiment can connect the first board 11 and the second board 12 simply by combining the plug terminal 15 and the socket terminal 16, which requires less effort and improves the workability of the connection compared to connecting using screws.

[0049] Furthermore, since the first circuit board 11 and the second circuit board 12 are connected using only the terminal structure of the plug terminal 15 and the socket terminal 16, the connection status of the plug terminal 15 and the socket terminal 16 can be visually confirmed, making the connection more reliable compared to, for example, using a connector in which the terminals are arranged inside an insulating case.

[0050] Furthermore, since the guide portion 22 of the plug terminal 15 is sandwiched and held between the holding portion 53 of the socket terminal 16 and the second circuit board 12, the second plug terminal portion 28 can be pressed against the second socket terminal portion 58 for a secure connection, thereby stabilizing the electrical connection.

[0051] Furthermore, since the plug terminal 15 uses four legs 24 to attach to the first circuit board 11, a firm and stable attachment to the first circuit board 11 is possible. However, the plug terminal 15 needs to be attached to the first circuit board 11 in a predetermined orientation, and if the four legs 24 are symmetrical, it is possible to attach it to the first circuit board 11 even if it is 180° incorrectly oriented. Therefore, when using four legs 24, they may be provided asymmetrically on the left and right sides to prevent attachment in the wrong orientation.

[0052] In this case, as shown in Figure 11, the number of legs 24 on the left and right sides may be different. For example, two legs 24 may be provided on the left side and one leg 24 on the right side. In this case, the number and position of the holes 11c in the first substrate 11 into which the legs 24 are inserted and attached should also correspond. By configuring it in this way, the orientation of the plug terminal 15 to be attached to the first substrate 11 can be easily determined from the number of legs 24 on the left and right sides, and incorrect attachment can be prevented.

[0053] Furthermore, the leg portion 24 is provided with a locking structure that prevents it from coming loose by being inserted into the hole 11c of the first substrate 11. This locking structure may be provided with a locking projection in the width direction of the leg portion 24, as shown in Figure 5, or it may be provided by bending the leg portion 24 in the thickness direction, as shown in Figure 11. This locking structure can also be applied to the socket terminal 16 in the same way.

[0054] Alternatively, a socket terminal 16 may be provided on the first board 11 and a plug terminal 15 on the second board 12.

[0055] Embodiments of the present invention and their variations have been described above, but various combinations of configurations, as well as partial omissions, substitutions, and modifications, are also possible. [Explanation of symbols]

[0056] 10 Board connection device 11. First circuit board 12 Second board 15 Plug terminals 16 Socket terminals 20 Plug connection fixing part 21 Plug section 22 Guide section 27. First plug terminal section 28 Second plug terminal section 35 Uneven fitting structure 42 Stopper section 50 Socket connection fixing part 51 Socket part 52 Socket openings 53 Holding part 57 First socket terminal section 58 Second socket terminal section

Claims

1. A substrate connecting device for connecting a first substrate and a second substrate arranged along a direction intersecting the first substrate, A plug terminal having a plug connection fixing portion that is connected and fixed to the first substrate, and a plug portion that rises from the plug connection fixing portion and protrudes from the first substrate, A socket connection fixing portion connected and fixed to the second substrate, a socket portion rising from the socket connection fixing portion and protruding from the second substrate, and a socket terminal having a socket opening that opens in the socket connection fixing portion and the socket portion in a direction along the second substrate, wherein the socket portion contacts and connects to the plug portion inserted into the socket opening, A substrate coupling device characterized by comprising the following:

2. The plug portion has a pair of first plug terminal portions that rise up from the plug connection fixing portion and are arranged facing each other, and a second plug terminal portion that rises up from the plug connection fixing portion and is arranged on one side that intersects the opposing direction of the pair of first plug terminal portions. The socket portion includes a pair of first socket terminal portions that rise from the socket connection fixing portion and contact the pair of first plug terminal portions, and a second socket terminal portion that is provided between the tips of the pair of first socket terminal portions and contacts the second plug terminal portion. The substrate coupling device according to feature 1.

3. The plug terminal has a guide portion that rises from the plug connection fixing portion on the side of the plug portion opposite to the second plug terminal portion, protrudes from the first substrate, and contacts the second substrate. The socket terminals have a pair of first socket terminal portions that protrude into the socket opening and a holding portion that holds the guide portion, which is inserted into the socket opening, between itself and the second substrate. The substrate coupling device according to feature 2.

4. The guide portion has a stopper portion which, when the plug terminal inserted into the socket opening is inserted into a predetermined connection position with the socket terminal, the holding portion comes into contact with it and restricts insertion. The substrate coupling device according to feature 3.

5. The distance from the second socket terminal to the holding portion is the distance from the side surfaces of the pair of first plug terminals facing the second plug terminal to the guide portion. The substrate coupling device according to feature 3.

6. The distance from the second socket terminal to the holding portion is the distance from the side of the guide portion opposite to the plug portion to the pair of first plug terminals. The substrate coupling device according to feature 3.

7. When separated from the socket, the tips of the pair of first plug terminals are separated from each other, and when connected to the socket, the tips of the pair of plug terminals are in contact with each other. The substrate coupling device according to feature 2.

8. The plug portion and the socket portion have a recessed-recessed fitting structure that allows the plug terminal, which is inserted into the socket opening, to engage with the socket terminal when it is inserted into a predetermined connection position. The substrate coupling device according to feature 1.

Images