Circuit board combined structure

Abstract

The present invention relates to a circuit board combination structure, and more particularly to a circuit board combination structure including: a circuit board including an asymmetric portion in which one corner is formed asymmetrically relative to other corners; a guide case coupled to the circuit board, the guide case being a support plate that supports a lower portion of the circuit board; and a guide unit arranged on one surface of the support plate in a direction corresponding to the direction in which the asymmetric portion is located.

Description

[Technical Field]

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0131857, filed on October 13, 2022, and all contents disclosed in the documents of this Korean patent application are incorporated herein by reference.

[0002] The present invention relates to a circuit board bonding structure, and more particularly to a bonding structure for assembling circuit boards. [Background technology]

[0003] PCB (Printed Circuit Board) is an essential component used in almost all electronic equipment. It is a printed circuit board formed by wiring electrical and electronic elements on an insulating plate to connect them in a circuit. PCB has a structure in which conductors and insulators are laminated in the shape of a board, and can be equipped with numerous electrical and electronic components such as semiconductors, capacitors, and resistors. The mounted electrical and electronic components can be electrically connected via electrical wiring circuits printed on the PCB. PCBs can reduce the size of electronic equipment by efficiently designing electrical wiring, thereby improving performance and productivity.

[0004] A large number of electrical and electronic components mounted on a PCB can send and receive electrical signals. However, when the volume of electrical signals being sent and received increases or when the signals must be processed at high speed, the signal processing speed slows down, causing a decrease in PCB performance. To solve this problem, methods such as increasing the number of PCB layers to expand the device capacity are used.

[0005] In the assembly process of mounting electrical and electronic components onto a PCB, it is important to correctly position the PCB to assemble the electrical and electronic components onto the PCB board in the designed direction. If the PCB board is positioned in the wrong direction or misaligned by a certain angle, the electrical and electronic components to be mounted on the PCB board will be mounted in the wrong direction or in the wrong position, which can cause conflicts between electrical signals transmitted or received between the assembled electrical and electronic components on the PCB board after assembly, preventing the PCB board from performing its intended function.

[0006] In addition, PCBs require signal grounding to set the signal voltage reference point for the electrical signals transmitted or received by the electrical and electronic devices mounted on the PCB. Signal grounding can reduce the inflow of noise into the electrical signals transmitted or received by the electrical and electronic devices mounted on the PCB. However, when the PCB is fixed with a screw during the PCB assembly process, the rotational force of the screw can cause the PCB to shift by a certain angle, resulting in the disconnection of the signal grounding.

[0007] Therefore, there is a need to develop a technology to solve the above problems. Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been made to solve the above-mentioned problems, and provides a circuit board connection structure in which one corner of a circuit board is formed asymmetrically relative to other corners, etc., so that it is possible to intuitively determine whether the arrangement direction of the circuit board is correct during the assembly process of assembling electronic components to the circuit board, and to simultaneously fix the position of the circuit board on a guide case and ground the signal. [Means for solving the problem]

[0009] In one embodiment, the present invention provides a circuit board combination structure including: a circuit board including an asymmetric portion in which one corner is formed asymmetrically relative to other corners; a guide case coupled to the circuit board, the guide case being a support plate supporting a lower portion of the circuit board; and a guide unit disposed on one surface of the support plate in a direction corresponding to the direction in which the asymmetric portion is located.

[0010] The corners of the asymmetric portion may be formed in an oblique direction relative to other adjacent corners.

[0011] The guide unit may include a guide portion having a shape corresponding to the shape of the asymmetric portion, and the asymmetric portion may be in contact with the guide portion.

[0012] The guide portion may be formed to extend in a direction perpendicular to one surface of the support plate.

[0013] The guide unit may further include a contact portion formed extending toward one side of the guide portion, and the asymmetric portion may be fitted and coupled between the contact portion and the support plate to contact the contact portion.

[0014] The guide unit may include an electrically conductive material, and a ground pattern for grounding the circuit board may be formed on an upper surface of the asymmetric portion, and the ground pattern and the contact portion may be electrically connected to each other.

[0015] In addition, the guide unit further includes an elastic clip protruding from the lower surface of the contact portion, and the elastic clip is made of an elastically deformable metal material, and when the asymmetric portion is coupled to the guide unit, an end portion thereof can be elastically deformed along the coupling direction of the asymmetric portion to contact the ground pattern.

[0016] The contact portion may be made of an elastically deformable metal material and may include a pressure portion formed in a downwardly convex shape, and a guide portion formed to extend from the pressure portion toward the distal end and to have an upward slope toward the end.

[0017] In addition, one corner of the contact portion may be connected to one corner of the guide portion via a hinge, and the hinge may include a spring connected to a rotation axis of the hinge, one end of which is fixed to the guide portion and the other end of which is fixed to the contact portion.

[0018] The spring may be spirally coupled along the longitudinal direction of the rotation shaft, with one end of the spring extending toward one side of the spring and the other end of the spring extending toward the other side of the spring.

[0019] The connector may further include a fixing unit for fastening the contact portion to the circuit board.

[0020] In addition, a first coupling hole having an inner surface coated with an electrically conductive metal material may be formed on the ground pattern, and a second coupling hole may be formed in the contact portion at a position corresponding to the first coupling hole by coupling the fastening unit thereto, and the fastening unit may be coupled to the first coupling hole and the second coupling hole.

[0021] In addition, the circuit board may be detachable from and attachable to the guide case. [Effects of the Invention]

[0022] In the present invention, one corner shape of a circuit board is formed asymmetrically relative to the other corner shapes, so that during the assembly process of assembling electronic components on the circuit board, it is possible to intuitively determine whether the arrangement direction of the circuit board is correct based on the position of the corner shape of the asymmetric part, thereby preventing electronic components, etc. from being assembled in the wrong direction due to incorrect arrangement of the circuit board during the assembly process.

[0023] In addition, the present invention can improve the efficiency of the assembly process by simultaneously fixing the circuit board to the guide case to which the circuit board is coupled and grounding the circuit board at the same time, which facilitates the assembly of electronic components onto the circuit board. Furthermore, since the ground pattern is formed over a large area on the asymmetric portion of the circuit board, the contact area with the guide unit increases, improving the grounding function. [Brief explanation of the drawings]

[0024] [Figure 1] 10(a) and 10(b) are schematic plan views illustrating embodiments of the present invention according to the positions of first fastening holes and the shape of a circuit board. [Figure 2] 1A to 1D are perspective views showing various embodiments of ground patterns formed in an asymmetric portion of a circuit board according to the present invention. [Figure 3] 1 is a plan view schematically illustrating the appearance of a guide case according to the present invention; [Figure 4] 1 is a plan view schematically illustrating a state in which a circuit board and a guide case according to the present invention are combined; [Figure 5] (a) is a cross-sectional view taken along AA' in Figure 4, which is a diagram schematically showing the manner in which the circuit board is connected to the guide case and one embodiment of the contact portion, and (b) to (d) are cross-sectional views schematically showing the manner in which the circuit board is connected to the guide case and other embodiments of the contact portion, taken at the same position as the cross-sectional view shown in (a). [Figure 6] FIG. 5(d) is a plan view schematically illustrating the state in which the contact portion and the guide portion of the present invention are connected via a hinge. [Figure 7] 5 is a cross-sectional view taken along the line AA′ in FIG. 4, and is a diagram schematically illustrating a state in which the circuit board of the present invention is fastened to the guide case via a fastening unit. [Figure 8] 1A and 1B are exploded views showing the shape of a tightening unit and how a fastening unit is coupled to the tightening unit. DETAILED DESCRIPTION OF THE INVENTION

[0025]

[0032] The present invention will now be described in detail with reference to the accompanying drawings, in order to enable those skilled in the art to easily carry out the present invention. However, the present invention may be embodied in many different forms and should not be construed as being limited to the following embodiments.

[0026] In order to clearly explain the present invention, detailed descriptions of parts that are not relevant to the explanation or related known technologies that may unnecessarily obscure the gist of the present invention will be omitted, and in adding reference symbols to components in each drawing in this specification, the same or similar reference symbols will be used for the same or similar components throughout the specification.

[0027] Furthermore, the terms and words used in this specification and claims should not be interpreted in a limited way to their ordinary or dictionary meanings, but should be interpreted in a way that is consistent with the technical idea of ​​the present invention, in accordance with the principle that an inventor can define the concept of a term as appropriate in order to best explain his or her invention.

[0028] Combined structure 10 One embodiment of the present invention relates to a coupling structure 10 of the present invention, which may include a circuit board 100 and a guide case 200 .

[0029] The circuit board 100 may be, but is not limited to, various types of circuit boards such as PCB (Printed Circuit Board), FPCB (Flexible Printed Circuit Board), RF-PCB (Rigid-Flexible Printed Circuit Board), HDI (High Density Interconnection), etc., and is preferably a PCB board.

[0030] 1(a) and 1(b), the circuit board 100 may be formed in a plate shape and may be formed in an asymmetric shape. The circuit board 100 may include a symmetrical portion 110, a ground pattern 120, and a first fastening hole 130.

[0031] The circuit board 100 may include an asymmetric portion 110 at any one corner portion, which makes the circuit board 100 appear asymmetrical.

[0032] The asymmetric portion 110 may be formed in the shape of a linear corner in an oblique direction relative to other adjacent corners, etc., or may be formed asymmetrically with respect to a vertex or corner portion of the circuit board 100 located diagonally relative to the asymmetric portion 100.

[0033] The asymmetric portion 110 may be formed in a shape different from the shape of the vertex or the like of the circuit board 100 located at the end of the corner adjacent to the asymmetric portion 110 .

[0034] The asymmetric portion 110 allows an operator to immediately check whether the circuit board 100 is arranged in the correct direction when assembling electronic components on the circuit board 100. Since the asymmetric portion 110 is formed only at one corner or the like of the circuit board 100 and only in a predetermined direction, when the circuit board 100 is rotated 180 degrees around an axis perpendicular to one surface of the circuit board 100, an operator can determine the position of the asymmetric portion 110 and correct the arrangement of the circuit board 100 so that it is arranged in the correct direction.

[0035] Referring to (a) to (d) of FIG. 2, the asymmetric portion 110 may have a ground pattern 120 formed thereon.

[0036] The ground pattern 120 may be configured to signal-ground the circuit board 100 to reduce noise such as EMI (Electro Magnetic Interference) and ESD (Electro Static Discharge), which are factors that impair the performance of the circuit board 100, and to form a reference voltage for transmission and reception signals between electronic components, etc. mounted on the circuit board 100.

[0037] The ground patterns 120 may be formed on the upper or side surface of the asymmetric part 110 with a predetermined area and number so as to increase the contact area with the guide unit 220 and improve the grounding function.

[0038] 2(a), in one embodiment, the ground pattern 120 may be formed on the upper surface of the asymmetric portion 110. The circuit board 100 may be coupled to the guide case 200, and the asymmetric portion 110 may be coupled to a guide unit 220 of the guide case 200, which will be described later. The ground pattern 120 formed on the upper surface of the asymmetric portion 110 may contact the lower surface of the contact portion 222 of the guide unit 220, thereby electrically connecting them, and the circuit board 100 may be grounded.

[0039] 2(b), in another embodiment, the ground pattern 120 may be formed on one side end of the asymmetric portion 110. When the circuit board 100 is coupled to the guide case 200, the one side end of the asymmetric portion 110 may contact the guide portion 221 of the guide unit 220 having a shape corresponding to the shape of the asymmetric portion 110.

[0040] 2(c), in another embodiment, the ground pattern 120 may be formed on the entire upper surface and one side end of the asymmetric portion 110. By forming the ground pattern 120 on the entire upper surface and one side end where the ground pattern 120 contacts the guide unit, the contact area between the ground pattern 120 and the guide unit can be increased.

[0041] 2(d), in another embodiment, the ground pattern 120 may be formed to extend from the upper surface to one side end of the asymmetric portion 110. By widening the area of ​​the ground pattern 120, the contact area with the guide unit 220 can be increased, thereby improving the signal grounding function of the circuit board 100.

[0042] The ground pattern 120 may be formed of an electrically conductive metal material so that it can be electrically connected to the guide unit 220, and the metal material may be, but is not limited to, copper, gold, silver, aluminum, etc.

[0043] The circuit board 100 may have a first fastening hole 130 formed therein, which is a groove having a predetermined depth or penetrates the circuit board 100. The fastening unit 300, which will be described later, may be coupled to the first fastening hole 130.

[0044] Referring to (a) and (b) of FIG. 1, the position of the first fastening hole 130 is not limited thereto, but may be formed on the ground pattern 120 or may be formed at a predetermined distance from the ground pattern 120, for example.

[0045] 3 and 4, the guide case 200 is coupled to the circuit board 100 to ground the circuit board 100 and support and fix the circuit board 100 so as to facilitate mounting electronic components on the circuit board 100. The circuit board 100 can be coupled to and detached from the guide case 200.

[0046] The guide case 200 may include a support plate 210 and a guide unit 220 .

[0047] The support plate 210 is formed in a plate shape with an area larger than the area of ​​the upper surface of the circuit board 100, and can support the lower part of the circuit board 100 when the circuit board 100 is coupled to the guide unit 220.

[0048] A guide unit 220 may be disposed on the support plate 210 .

[0049] The guide unit 220 may be coupled to the asymmetric portion 110 of the circuit board 100. The position where the guide unit 220 is arranged on the support plate 210 may be located in a direction corresponding to the direction in which the asymmetric portion 110 is located on the circuit board 100. That is, the guide unit 220 may be located on the support plate 210 so as to be biased in the direction in which one of the vertices of the support plate 210 is located.

[0050] The guide unit 220 may be formed including an electrically conductive metal material so as to be electrically connected to the ground pattern 120, and the metal material may be, but is not limited to, copper, gold, silver, aluminum, etc. The guide portion 221 and the contact portion 222 included in the guide unit 220 may also be formed of the electrically conductive metal material.

[0051] The guide unit 220 is also signal-grounded, so that the guide unit 220 is electrically connected to the ground pattern 120 and can signal-ground the electric circuit 100 .

[0052] The guide unit 220 may include a guide portion 221 and a contact portion 222 .

[0053] The guide portion 221 may have an inner surface formed to include a shape corresponding to the front and side shapes of the asymmetric portion 110. When the circuit board 100 is coupled to the guide case 200 by the guide portion 221, the asymmetric portion 110 is guided along the inner surface of the guide portion 221 and may be seated on the seating portion 221a formed inside the guide portion 221. The position of the circuit board 100 on the support plate 210 may be fixed by the asymmetric portion 110 seated on the guide portion 221. Since the position of the circuit board 100 is fixed on the support plate 210 as described above, when the contact portions 222, 230, and 240 and the circuit board 100 are subsequently fastened to each other via the fastening unit 300, the movement of the circuit board 100 can be reduced and the fastening can be easily performed.

[0054] The guide portion 221 may be formed to extend in a direction perpendicular to one surface of the support plate 210. The height to which the guide portion 221 extends may be the same as the thickness of the circuit board 100 or may be formed to extend longer than the thickness.

[0055] Referring to (a) to (d) of Figures 5, the contact portion 222 may be configured to extend from the upper surface or one side of the guide portion 221 in a direction toward one side and contact the ground pattern 120 formed on the upper surface of the asymmetric portion 110.

[0056] 5(a), in one embodiment, the contact portion 222 may be formed to extend from an upper portion or one side of the guide portion 221 toward a direction in which the asymmetric portion 110 is coupled to the guide portion 221. In this case, the contact portion 222 is formed to be fixed to the guide portion 221, and the distance between the contact portion 222 and the support plate 210 may be the same as or slightly smaller than the thickness of the asymmetric portion 110. Since the asymmetric portion 110 is coupled to the guide unit 220, when the asymmetric portion 110 slides on the support plate 210 in the direction in which the guide unit 220 is positioned, the asymmetric portion 110 is forcibly fitted into the space between the contact portion 222 and the support plate 210 and coupled thereto, and the contact portion 222 and the guide portion 221 may come into contact with the ground pattern 120 of the asymmetric portion 110 and be electrically connected thereto.

[0057] Referring to FIG. 5(b), in another embodiment, an elastic clip 222a may be coupled to the contact portion 222. The elastic clip 222a may be coupled to protrude from the lower surface of the contact portion 222 and may be inclined obliquely along the direction in which the asymmetric portion 110 couples to the guide unit 220. The elastic clip 222a may be made of a metal material that is elastically deformable within an elastic deformation range, such as copper, gold, silver, aluminum, iron, or zinc. When the asymmetric portion 110 is inserted into the seating portion 221a, the asymmetric portion 110 is elastically deformed along the coupling direction of the asymmetric portion 110 by a force pressing the elastic clip 222a, thereby contacting and electrically connecting with the ground pattern 120 formed on the upper surface of the asymmetric portion 110. One or more elastic clips 222a may be provided.

[0058] The elastic clip 222a may be formed to have a predetermined width and length, and may be formed to have a thickness that is relatively thin compared to the width and length.

[0059] 5(c), in another embodiment, the contact portion 230 may be formed to extend from an upper portion or one side of the guide portion 221 toward a direction in which the asymmetric portion 110 is coupled to the guide portion 221, and may be formed of an electrically conductive metal material that is elastically deformable within an elastic deformation range. The contact portion 230 may include a pressure portion 230a and a guide portion 230b.

[0060] The pressure portion 230a is formed in a downwardly convex shape, and when the asymmetric portion 110 is coupled to the guide portion 221, the lowest point of the pressure portion 230a can press and come into contact with the ground pattern 120 of the asymmetric portion 110.

[0061] The guide portion 230b may be formed at the end of the contact portion 230, extending from the pressure portion 230a toward the end, and may be sloped upward toward the end. When the asymmetric portion 110 slides in the direction of the guide portion 221, the guide portion 230b comes into contact with the asymmetric portion 110, and the asymmetric portion 110 moves while pushing up the guide portion 230b, so that the slope formed on the guide portion 230b may be deformed more and more steeply. As the slope of the guide portion 230b is deformed more and more steeply, the pressure portion 230a presses the upper surface of the asymmetric portion 110 due to an elastic restoring force, and may be electrically connected to the ground pattern 120.

[0062] Referring to FIG. 5(d) and FIG. 6, in another embodiment, one corner of the contact portion 240 may be connected to one corner of the guide portion 221 via a hinge 241. The contact portion 240 may rotate around the rotation axis of the hinge 241. The hinge may include a coil spring 242 connected to the contact portion 240 and spirally wrapped around the longitudinal direction of the rotation axis. One end and the other end of the spring 242 may extend along the spiral toward one side and the other side of the spring 242, respectively, and one end may be fixed to the upper surface of the guide portion 221, and the other end may be fixed to the upper surface of the contact portion 240. When the end of the contact portion 240 rotates in a direction away from the support plate 210, the spring 242 rotates in the same direction as the rotation of the contact portion 240 relative to one end fixed to the guide portion 221, and the other end fixed to the contact portion 240 applies elastic force so that the contact portion 240 rotates again in the opposite direction to the rotation direction. When the asymmetric portion 110 approaches to be coupled to the guide unit 220, the end of the contact portion 240 rotates in a direction away from the support plate 210 to form a space in which the asymmetric portion 110 can be coupled to the guide portion 221. After the asymmetric portion 110 and the guide portion 221 are coupled, the elastic force of the spring 242 allows the contact portion 240 to come into contact with the ground pattern 120 formed on the upper surface of the asymmetric portion 110 and be electrically connected thereto.

[0063] The circuit board bonding structure 10 may further include a fastening unit 300 .

[0064] Referring to FIG. 7, the fastening unit 300 fastens and fastens the contact portions 222, 230, and 240 to the circuit board 100, thereby completely fixing the circuit board 100 on the guide case 200.

[0065] The circuit board 100 may have a first fastening hole 130 formed therein, and the contact portions 222, 230, and 240 may have second fastening holes 222b, 230c, and 240a formed therein. The first fastening hole 130 and the second fastening holes 222b, 230c, and 240a may be fastened together by a fastening unit 300.

[0066] In one embodiment, the first fastening hole 130 may be formed at a position spaced a predetermined distance from the ground pattern 120, and the second fastening holes 222b, 230c, and 240a may be formed at a position corresponding to the first fastening hole 130. The fastening unit 300 may be inserted into and coupled to the first fastening hole 130 and the second fastening holes 222b, 230c, and 240a to fasten the contact portions 222, 230, and 240 to the circuit board 100.

[0067] In another embodiment, first fastening hole 130 may be formed on ground pattern 120 of asymmetric portion 110, and second fastening holes 222b, 230c, and 240a may be formed at positions corresponding to first fastening hole 130, and first fastening hole 130 and second fastening holes 222b, 230c, and 240a may be fastened together by fastening unit 300. The inner surface of first fastening hole 130 may be coated along the periphery with the same electrically conductive metal material as that of ground pattern 120, and the coated inner surface may be connected to ground pattern 120. Second fastening holes 222b, 230c, and 240a may be formed of the same electrically conductive metal material as that of contact portions 222, 230, and 240. Since the fastening unit 300 is also formed of an electrically conductive metal material, the first fastening hole 130 and the second fastening holes 222b, 230c, and 240a can be electrically connected by the fastening unit 300 coupled to the first fastening hole 130 and the second fastening holes 222b, 230c, and 240a.

[0068] 8, in another embodiment, the fastening unit 300 may include a clamping unit 310 coupled to the fastening unit 300. The clamping unit 310 includes a body 311 and a flange 312. The body 311 has openings formed on its upper and lower surfaces and a hollow space therein, so that the upper surface, the lower surface, and the hollow space can be in communication with each other. The body 311 may be cylindrical, or may have a cross-sectional area that gradually decreases from the upper surface to the lower surface. The body 311 may have a slit groove 311a formed in the body 311 along its longitudinal direction. The fastening unit 310 is inserted into the first fastening hole 130 and the second fastening holes 222b, 230c, and 240a. When the fastening unit 300 is coupled through an opening formed on the upper surface of the body portion 311, the fastening unit 310 opens a gap between the slit grooves 311a, and the body portion 311 closely contacts the first fastening hole 130 and the second fastening holes 222b, 230c, and 240a. The fastening unit 310 may be made of an electrically conductive, plastically deformable metal material to facilitate deformation. The flange 312 may be bent outward from the upper end of the body portion 311.

[0069] Although the present invention has been described above using limited embodiments and drawings, the present invention is not limited thereto, and various implementations within the technical spirit of the present invention and the scope of the claims set forth below can be made by a person having ordinary skill in the art to which the present invention pertains. [Explanation of symbols]

[0070] 10: Circuit board bonding structure 100: Circuit board 110: Asymmetrical part 120: Ground pattern 130: First closing hole 200: Guide case 210: Support plate 220: Guide unit 221: Guide section 221a: Anchorage part 222, 230, 240: Contact parts 222a: Elastic clip 222b, 230c, 240a: Second fastening hole 230a: Pressurizing section 230b: Induction part 241: Hinge 242: Spring 300: Fastening unit 310: Clamping unit

Claims

1. A circuit board including an asymmetric portion in which one corner is formed asymmetrically with respect to other corners, etc.; and a guide case coupled to the circuit board; The guide case is a support plate that supports a lower portion of the circuit board; and A circuit board joining structure including a guide unit disposed on one surface of the support plate in a direction corresponding to a direction in which the asymmetric portion is located.

2. The circuit board bonded structure according to claim 1 , wherein the corners of the asymmetrical portion are formed in an oblique direction relative to adjacent corners.

3. the guide unit includes a guide portion having a shape corresponding to the shape of the asymmetric portion, The circuit board joining structure according to claim 2 , wherein the asymmetric portion is in contact with the guide portion.

4. The circuit board assembly structure according to claim 3 , wherein the guide portion is formed to extend in a direction perpendicular to one surface of the support plate.

5. The guide unit further includes a contact portion extending toward one side of the guide portion, The circuit board bonding structure according to claim 3 , wherein the asymmetric portion is fitted and coupled between the contact portion and the support plate, and is in contact with the contact portion.

6. the guide unit includes an electrically conductive material; 6. The circuit board combination structure according to claim 5, wherein a ground pattern for grounding the circuit board is formed on an upper surface of the asymmetric portion, and the ground pattern and the contact portion are electrically connected to each other.

7. the guide unit further includes an elastic clip protruding from a lower surface of the contact portion, 7. The circuit board connection structure of claim 6, wherein the elastic clip is formed of an elastically deformable metal material, and when the asymmetric portion is connected to the guide unit, the end portion is elastically deformed along the direction in which the asymmetric portion is connected to contact the ground pattern.

8. 7. The circuit board connection structure according to claim 6, wherein the contact portion is made of an elastically deformable metal material and includes a pressure portion formed in a downwardly convex shape, and a guide portion formed extending from the pressure portion toward the distal end and having an upward slope toward the end.

9. One corner of the contact portion is connected to one corner of the guide portion via a hinge, 7. The circuit board assembly structure according to claim 6, wherein the hinge includes a spring coupled to the rotation axis of the hinge, one end of which is fixed to the guide portion and the other end of which is fixed to the contact portion.

10. The spring is coupled spirally along the longitudinal direction of the rotation shaft, 10. The circuit board connection structure according to claim 9, wherein one end of the spring extends toward one side of the spring, and the other end of the spring extends toward the other side of the spring.

11. The circuit board joining structure according to claim 5 , further comprising a fixing unit for fastening the contact portion and the circuit board together.

12. A first coupling hole is formed on the ground pattern, the inner surface of which is coated with an electrically conductive metal material; The contact portion has a second coupling hole formed at a position corresponding to the first coupling hole by coupling the fastening unit thereto; The circuit board connection structure according to claim 11 , wherein the fastening unit is connected to the first connection hole and the second connection hole.

13. The circuit board assembly structure according to claim 1 , wherein the circuit board is connectable to and disconnectable from the guide case.

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