Nutted bolts and circuit board connectors

Abstract

In constructing the circuit board connector, the design aims to minimize the number of components, simplifying storage and management, while also ensuring sufficient mechanical strength and rigidity by incorporating cylindrical sections into some or all of the nutted bolts. [Solution] In constructing a bolt with a nut that integrates a nut and a bolt, the bolt portion 2 located on the lower side and the nut portion 3 located on the upper side are integrally formed on the same axis Fc, a male thread portion 2fs is formed on the outer circumferential surface 2f of the bolt portion 2, and a female thread portion 3is that can be screwed into the male thread portion 2fs is formed on the inner circumferential surface 3i of a circular hole portion 3h formed inside from the upper surface 3u of the nut portion 3 located at the upper end of the bolt portion 2, and an engagement surface 3fc with a polygonal surface that can be engaged with an external operating tool is formed on the outer circumferential surface 3f of the nut portion 3.

Description

[Technical Field]

[0001] The present invention relates to a bolt with an integrated nut in which a nut portion and a bolt portion are integrated, and a substrate coupler using the bolt with an integrated nut. [Background Art]

[0002] Conventionally, when a plurality of substrates such as printed circuit boards are sequentially connected in a vertically stacked manner to form a multi-stage substrate, a substrate coupler including a bolt having a length corresponding to the number of stages, a nut screwed onto a tip end of the bolt, and a separator structure for setting the substrates at predetermined intervals has been exclusively used. As this type of substrate coupler, a printed circuit board mounting apparatus described in Patent Document 1 and a substrate storage container described in Patent Document 2 are known.

[0003] In the printed circuit board mounting apparatus of Patent Document 1, a long fixing bolt is integrally fixed to an electrical component to be placed on one surface of a printed circuit board, a through hole through which the fixing bolt is inserted is formed in the printed circuit board, the fixing bolt is inserted through the through hole, and an electrical component fixing nut is screwed onto the fixing bolt exposed from the other surface of the printed circuit board so as to clamp the printed circuit board, thereby fixing the electrical component onto one surface of the printed circuit board. Furthermore, on a printed circuit board mounting wall of a case that accommodates the printed circuit board therein, there are provided a stepped portion against which a peripheral edge of the printed circuit board abuts, a connector opening for taking out an electrical connection connector fixed to the other surface of the printed circuit board to the outside, and a boss portion which has a through hole through which the fixing bolt is inserted, a recess into which the electrical component fixing nut is loosely fitted, and is set at the same height as the stepped portion. The fixing bolt is inserted through the through hole of the boss portion, and a printed circuit board fixing nut is screwed onto the fixing bolt exposed to the outside of the case so as to clamp the printed circuit board mounting wall of the case, thereby fixing the printed circuit board in close contact on the stepped portion in the case.

[0004] Furthermore, the substrate storage container described in Patent Document 2 aims to provide a substrate storage container that can suppress deterioration of the substrate surface due to contact with moisture. Specifically, it comprises a main body that partitions a storage space for storing substrates, the volume of the storage space being adjustable to match the number of substrates, and the surface partitioning the storage space being made of metal, and a port connected to the main body that is used for exhausting the storage space or introducing an inert gas into the storage space. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Utility Model Publication No. 61-65792 [Patent Document 2] Japanese Patent Publication No. 2020-161653 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] However, conventional circuit board connectors, including the aforementioned printed circuit board mounting devices and circuit board storage containers, had the following problems.

[0007] In other words, it requires at least three types of parts and processing structures, including bolts and nuts, as well as spacer structures to set the spacing between boards, which tends to increase the number of parts and processing steps. In particular, when constructing a multi-stage board unit that connects multiple boards in a stacked manner, it is necessary to prepare bolts of different lengths for each different board unit, which makes the storage and management of parts complicated and tends to lead to increased parts costs.

[0008] In addition, because the substrate is fixed using a single bolt, there is a risk of bending or misalignment due to strong external impacts or loads, making it difficult to ensure sufficient mechanical strength and rigidity.

[0009] The present invention aims to provide a bolt with a nut and a substrate connector that solve the problems present in the background technology described above. [Means for solving the problem]

[0010] The nutted bolt 1 according to the present invention solves the above-mentioned problems by forming a nutted bolt in which the nut portion and the bolt portion are integrated, wherein the bolt portion 2 located on the lower side and the nut portion 3 located on the upper side are integrally formed on the coaxial Fc, a male threaded portion 2fs is formed on the outer peripheral surface 2f of the bolt portion 2, a female threaded portion 3is that can be screwed into the male threaded portion 2fs is formed on the inner peripheral surface 3i of a circular hole portion 3h formed inside from the upper surface 3u of the nut portion 3 located at the upper end of the bolt portion 2, and an engagement surface 3fc with a polygonal surface that can be engaged with an external operating tool is formed on the outer peripheral surface 3f of the nut portion 3.

[0011] In this case, according to a preferred embodiment of the invention, when constructing the bolt with nut 1, the nut portion 3 can be integrally provided with a flange portion 3e formed outwardly on the outer peripheral edge of its lower end, and the bolt portion 2 can form a hollow portion 5 that communicates with the circular hole portion 3h of the nut portion 3. Furthermore, when constructing the bolt with nut 1, the polygonal surface of the engagement surface 3fc can be formed into a hexagonal surface 6.

[0012] On the other hand, the substrate connector 10 according to the present invention solves the above-mentioned problems by integrally forming a bolt portion 2 located on the lower side and a nut portion 3 located on the upper side on the coaxial Fc, forming a male thread portion 2fs on the outer peripheral surface 2f of the bolt portion 2, and forming a female thread portion 3is on the inner peripheral surface 3i of a circular hole portion 3h formed inside from the upper surface 3u of the nut portion 3 located at the upper end of the bolt portion 2, which can be screwed into the male thread portion 2fs, and forming an engagement surface 3fc with a polygonal surface on the outer peripheral surface 3f of the nut portion 3 which can be engaged with an external operating tool. The device is characterized by having a bolt 1 attached, with the bolt portion 2 of the lower nut-attached bolt 1(n) attached to the lower substrate P(n), the upper substrate P(n+1) positioned on the upper surface 3u of the nut portion 3 of the lower nut-attached bolt 1(n), and the bolt portion 2 of the upper nut-attached bolt 1(n+1) or fixing bolt 12, which is passed through a hole 11 provided in the upper substrate P(n+1), being screwed into the nut portion 3 of the lower nut-attached bolt 1(n), thereby fixing the lower substrate P(n) and the upper substrate P(n+1).

[0013] In this case, according to a preferred embodiment of the invention, when constructing the substrate connector 10, a base substrate Po having a female threaded portion Pos into which the bolt portion 2 is screwed can be used for the lower substrate P(n). In addition, a mounting block 13 having a female threaded portion Pes into which the bolt portion 2 is screwed can be fixed to the upper surface Pf of the substrate P(n) and provided on the lower substrate P(n). Furthermore, a spacer member 14 can be provided between the lower substrate P(n) and the upper substrate P(n+1) to set the distance between the lower substrate P(n) and the upper substrate P(n+1). [Effects of the Invention]

[0014] The nut-attached bolt 1 and substrate connector 10 according to the present invention provide the following remarkable effects.

[0015] (1) The substrate connector 10 is constructed using a bolt with a nut 1, in which a bolt portion 2 located on the lower side and a nut portion 3 located on the upper side are integrally formed on the coaxial surface Fc, a male threaded portion 2fs is formed on the outer peripheral surface 2f of the bolt portion 2, and a female threaded portion 3is that can be screwed into the male threaded portion 2fs is formed on the inner peripheral surface 3i of a circular hole portion 3h formed inside from the upper surface 3u of the nut portion 3 located at the upper end of the bolt portion 2, and an engagement surface 3fc with a polygonal surface that can be engaged with an external operating tool is formed on the outer peripheral surface 3f of the nut portion 3. As a result, even a multi-stage substrate unit that connects multiple substrates P... in a stacked formation can be constructed with a small number of parts, and in particular, there is no need to prepare bolts of different lengths for each different substrate unit, making it easier to store and manage parts. Moreover, since the bolt with a nut 1 includes a cylindrical portion in part or all of it, sufficient mechanical strength and rigidity can be ensured.

[0016] (2) In a preferred embodiment, when constructing the bolt with nut 1, if a flange portion 3e formed by bending outward is integrally provided on the outer peripheral edge of the lower end of the nut portion 3, the strength of the nut portion 3 can be increased by the flange portion 3e even when a space is provided inside the nut portion 3, thereby reducing the overall weight and increasing rigidity.

[0017] (3) In a preferred embodiment, when constructing the bolt with nut 1, if a hollow portion 5 is formed in the bolt portion 2 that communicates with the circular hole portion 3h of the nut portion 3, the amount of material used can be reduced, thereby contributing to overall weight reduction and cost reduction.

[0018] (4) In a preferred embodiment, when constructing the bolt with nut 1, if the polygonal surface of the engagement surface 3fc is formed into a hexagonal surface 6, a general operating tool such as a wrench can be used, making it easy and quick to tighten and loosen the bolt with nut 1.

[0019] (5) According to a preferred embodiment, when configuring the substrate coupler 10, if a base substrate Po having a female screw portion Pos to which the bolt portion 2 is screwed is used for the lower substrate P(n), the bolt portion 2 can be directly fixed to the base substrate Po, so that the present invention can be implemented easily and at low cost without using other components such as a mounting block.

[0020] (6) According to a preferred embodiment, if a mounting block 13 fixed on the upper surface Pf of the lower substrate P(n) and having a female screw portion Pes to which the bolt portion 2 is screwed is provided on the lower substrate P(n), the lower substrate P(n) does not require processing of the female screw portion Pos, so that the number of manufacturing man-hours involved in processing can be reduced, and inconveniences such as the bolt portion 2 protruding from the lower surface of the substrate P(n) can be avoided.

[0021] (7) According to a preferred embodiment, if a spacer member 14 for setting the distance between the lower substrate P(n) and the upper substrate P(n+1) is provided between the lower substrate P(n) and the upper substrate P(n+1), height (distance) adjustment can be performed by changing the thickness (axial length) of the spacer member 14 or combining one or more spacer members 14... of the same standard, so that versatility and further expandability can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] [Figure 1] Front sectional view of a bolt with a nut according to a preferred embodiment of the present invention, [Figure 2] Front view of the bolt with a nut, [Figure 3] Top plan view of the bolt with a nut, [Figure 4] Bottom view of the bolt with a nut, [Figure 5] Right side view of the bolt with a nut, [Figure 6] Partial cross-sectional configuration diagram showing a basic usage mode of a substrate coupler according to a preferred embodiment of the present invention, [Figure 7] Partial cross-sectional configuration diagram showing a first modified example of the usage mode of the same substrate coupler, [Figure 8]Figure 7 shows an exploded view of the parts used in the first modified example of usage. [Figure 9] A flowchart illustrating the assembly method of the substrate coupler for the first modified example shown in Figure 7. [Figure 10] A partial cross-sectional diagram showing the usage configuration of the second modified example of the substrate coupler. [Figure 11] A partial cross-sectional diagram showing the usage configuration of the third modified version of the substrate coupler. [Figure 12] A partial cross-sectional diagram showing the usage configuration of the fourth modified version of the substrate coupler. [Modes for carrying out the invention]

[0023] Next, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0024] First, the configuration of the bolt with nut 1 according to this embodiment will be described with reference to Figures 1-5.

[0025] As shown in Figures 1 and 2, the bolt with nut 1 is formed by integrally creating a bolt portion 2 located on the lower side and a nut portion 3 located on the upper side on the same axis Fc. The material used to form the bolt with nut 1 is not limited to a specific material, and can be made from known metal materials such as steel or synthetic resin materials.

[0026] The bolt portion 2 is formed in a cylindrical shape with a lower end surface portion 21 that closes the lower end, and a male thread portion 2fs is formed on the outer circumferential surface 2f. As a result, the upper end of the bolt portion 2 is open upward, and a hollow portion 5 is formed inside the bolt portion 2. The upper end of this hollow portion 5 communicates with the circular hole portion 3h of the nut portion 3, which will be described later. By forming a hollow portion 5 inside the bolt portion 2 that communicates with the circular hole portion 3h in this way, it is possible to reduce the amount of material used and increase the overall rigidity, thus offering the advantages of overall weight reduction, cost reduction, and increased overall strength.

[0027] Furthermore, the nut portion 3 is integrally formed with the upper end of the bolt portion 2. That is, as shown in Figure 1, the nut portion 3 comprises a threaded cylinder portion 31 located on the central side coaxial Fc with respect to the bolt portion 2, an engaging cylinder portion 32 located on the outer circumference outside the threaded cylinder portion 31, and an upper end surface portion 33 that covers from the upper end of the engaging cylinder portion 32 to the upper end of the threaded cylinder portion 31.

[0028] In this case, the lower end of the screw cylinder portion 31 is formed to be integral with the upper end of the bolt portion 2. Furthermore, a flange portion 3e formed by bending outward is integrally provided on the outer peripheral edge of the lower end of the nut portion 3, that is, on the outer peripheral edge of the lower end of the engaging cylinder portion 32. By providing the flange portion 3e formed by bending outward on the outer peripheral edge of the lower end of the nut portion 3 in this way, even if a space is provided inside the nut portion 3, the strength of the nut portion 3 can be increased by the flange portion 3e, thereby reducing the overall weight and increasing rigidity.

[0029] By forming the nut portion 3 in this manner, a circular hole 3h leading to the inside of the screw cylinder portion 31 is formed at the center of the upper end surface portion 33, which becomes the upper surface 3u of the nut portion 3. Therefore, a female screw portion 3is is formed on the inner circumferential surface 3i of this circular hole portion 3h. The female screw portion 3is and the male screw portion 2fs are formed to be screwable.

[0030] Furthermore, an engagement surface 3fc, which is a polygonal surface that can be engaged with an operating tool, is formed on the outer circumferential surface 32f of the engagement cylinder portion 32, which is the outer circumferential surface 3f of the nut portion 3. In this case, the polygonal engagement surface 3fc is formed as a hexagonal surface 6, as shown in Figure 3. By forming the polygonal surface of the engagement surface 3fc as a hexagonal surface 6 in this way, a common operating tool such as a wrench can be used, making it easy and quick to tighten and loosen the bolt with nut 1.

[0031] This results in a bolt with a nut 1, in which the nut portion 3 and the bolt portion 2 are integrated. Therefore, a single bolt with a nut 1 can be used as a substrate connector 10 as shown in Figure 6, that is, a substrate connector 10 that connects a lower substrate (printed circuit board, etc.) P(n) and an upper substrate P(n+1).

[0032] The substrate connector 10 shown in Figure 6 represents a substrate unit U0 based on a basic usage configuration. The substrate unit U0 shown in Figure 6 is used by providing fixing bolts 12 and a mounting block 13, and fixing the mounting block 13 to the upper surface Pf of the lower substrate P(n) with solder H. The example mounting block 13 is formed in an overall flat cylindrical shape with a screw hole 13s having a female screw portion Pes on its inner circumference at the center.

[0033] As a result, the bolt portion 2 of the nutted bolt 1 is screwed into the screw hole portion 13s of the mounting block 13 provided on the lower substrate P(n), and then the upper surface 3u of the nut portion 3 of the nutted bolt 1 An upper substrate P(n+1) with a hole 11 is placed on top, and the prepared fixing bolt 12 is screwed through the hole 11 into the female threaded portion 3is of the nut portion 3 of the bolt with nut 1, thereby forming a substrate unit U0 using the substrate connector 10.

[0034] In this way, by providing the lower substrate P(n) with a mounting block 13 that is fixed to the upper surface Pf of the substrate P(n) and has a female threaded portion Pes into which the bolt portion 2 is screwed, the lower substrate P(n) does not need to be processed to form the female threaded portion Pos, thereby reducing the manufacturing man-hours associated with processing and avoiding problems such as the bolt portion 2 protruding from the lower surface of the substrate P(n).

[0035] Next, various usage modes of the substrate connector 10 when multiple nut-equipped bolts 1(n)... are used to construct multiple layers of substrates P(n)... in a stacked configuration will be explained with reference to Figures 7-9.

[0036] In this case, basically, multiple bolts with nuts 1(n)... are prepared, the bolt portion 2 of the lower bolt with nuts 1(n) is attached to the lower substrate P(n), the upper substrate P(n+1) is placed on the upper surface 3u of the nut portion 3 of the lower bolt with nuts 1(n), and the bolt portion 2 or fixing bolt 12 of the upper bolt with nuts 1(n+1) is screwed through the hole 11 provided in the upper substrate P(n+1) into the nut portion 3 of the lower bolt with nuts 1(n), thereby fixing the lower substrate P(n) and the upper substrate P(n+1).

[0037] Figure 7 shows a first modified example of a circuit board unit U1, in which multiple circuit boards P(n)... are configured in a four-tiered (generally any number of tiers) stacked configuration by using three (generally any number of) nut-attached bolts 1(n)... as an example. Figure 8 is an exploded view of the components used in the circuit board unit U1 shown in Figure 7, and Figure 9 is a flowchart illustrating the assembly method of the circuit board unit U1 shown in Figure 7.

[0038] Next, the assembly method for the circuit board unit U1 will be explained according to the flowchart in Figure 9, with reference to Figures 7 and 8.

[0039] First, the first nutted bolt 1(n) is screwed onto the base substrate Po, which is substrate P(n) (step S1). In this case, unlike the other substrates P(n)..., the base substrate Po is the bottommost substrate P(n) of the substrate unit U1, so as shown in Figure 8, a screw hole Pos is formed at a predetermined position into which the bolt portion 2 of the nutted bolt 1 is screwed.

[0040] Thus, when constructing the substrate connector 10, if a base substrate Po is used on the lower substrate P(n) with a female threaded portion Pos into which the bolt portion 2 is screwed, the bolt portion 2 can be directly fixed to the base substrate Po. Therefore, it can be easily and inexpensively implemented without using other parts such as mounting blocks.

[0041] Next, the second substrate P(n+1) is placed on top of the nutted bolt 1(n) (step S2). Note that the second and subsequent substrates P(n+1) also have holes 11 through which the bolt portion 2 of the nutted bolt 1 can be inserted. The bolt portion 2 of the next nutted bolt 1(n+1) is inserted into the hole 11 from above the substrate P(n+1), and this bolt portion 2 is screwed into the threaded hole 3is of the nut portion 3 of the nutted bolt 1(n) to fix it in place (steps S3, S4).

[0042] Next, the third substrate P(n+2) is placed on the upper surface of the nutted bolt 1(n+1) (step S5). Then, the bolt portion 2 of the next nutted bolt 1(n+2) is inserted through the hole 11 from above the third substrate P, and this bolt portion 2 is screwed into the threaded hole 3is of the nut portion 3 of the nutted bolt 1(n+1) to secure it (steps S6, S7).

[0043] Similarly, the substrate P(m)... is placed on the nutted bolt 1(m-1)... and the bolt portion 2 of the next nutted bolt 1(m)... is inserted through the hole 11 from above the substrate P(m)... and this bolt portion 2 is screwed into the threaded hole 3is of the nut portion 3 of the nutted bolt 1(m-1)... to secure it (steps S8, S5...).

[0044] Then, once the desired number of stages has been completed, the final substrate Pp, which will be the uppermost substrate P, is placed on top of the uppermost nutted bolt 1(m) (step S9). Next, the prepared fixing bolt 12 is inserted through the hole 11 from above the final substrate Pp, and this fixing bolt 12 is screwed into the threaded hole 3is of the nut portion 3 of the uppermost nutted bolt 1(m) to secure it (steps S10, S11). This gives rise to the substrate unit U1, which will be a multi-stage (four-stage) substrate as shown in Figure 7 (step S12).

[0045] Next, various other modified examples of how the substrate coupler 10 according to this embodiment is used will be described with reference to Figures 10-12.

[0046] Figure 10 shows a configuration diagram of the substrate unit U2, which is a second modified example using the substrate connector 10.

[0047] This substrate unit U2 has four stages compared to the substrate unit U0 shown in Figure 6, and the second stage substrate P(n+1) is directly mounted on the upper surface 13u of the mounting block 13. The configuration of the other stages is the same as in Figure 7. In the case of substrate unit U2, as in Figure 6, the protrusion of the nut-attached bolt 1 from the lower surface of the lower substrate P(n) is avoided, the lower surface of substrate P(n) can be made flat, and the height of the second stage substrate P(n+1) can be arbitrarily changed by changing the height (axial length) of the mounting block 13.

[0048] Figure 11 shows a configuration diagram of the substrate unit U3, which is a third modified example using the substrate connector 10.

[0049] This circuit board unit U3 uses multiple (two in this example) nut bolts 1,1 connected vertically. Specifically, the bolt portion 2 of the upper nut bolt 1(n+1) is directly screwed into the nut portion 3 of the lower nut bolt 1(n). This allows the height of the second circuit board P(n+1) to be doubled. Therefore, by arbitrarily changing the number of nut bolts 1... used for connection, the distance between circuit boards P(n) and P(n+1) can be set to (2 × n) times. Except for having two stages, the circuit board unit U3 has the same configuration as the circuit board unit U1 in Figure 7.

[0050] Figure 12 shows a configuration diagram of the substrate unit U4, which is a fourth modified example using the substrate connector 10.

[0051] This substrate unit U4 has basically the same configuration as the substrate unit U1 in Figure 7, but when connecting the third substrate P(n+2) and the final substrate Pp, a spacer member 14 is interposed instead of a bolt with a nut 1. Therefore, the length of the fixing bolt 12 used is selected to correspond to the thickness (axial length) of the spacer member 14. The spacer member 14 is formed in a cylindrical shape. Therefore, the center of the spacer member 14 has an insertion hole 14s through which the fixing bolt 12 can be inserted.

[0052] In this way, by providing a spacer member 14 between the lower substrate P(n) and the upper substrate P(n+1) to set the distance between the lower substrate P(n) and the upper substrate P(n+1), the height (spacing) can be adjusted by changing the thickness (axial length) of the spacer member 14 or by combining one or more spacer members 14 of the same specifications, thereby increasing versatility and potential for further development. The other configurations are the same as those of the substrate unit U1 in Figure 7.

[0053] The first to fourth modification examples shown in Figures 7-12 are just examples. The substrate coupler 10 according to this embodiment is not limited to these modification examples and can be implemented in various forms, and the number of stages can be set to any number.

[0054] Therefore, according to the substrate connector 10 (bolt with nut 1) of this embodiment, the basic configuration is as follows: a bolt portion 2 located on the lower side and a nut portion 3 located on the upper side are integrally formed on the coaxial surface Fc; a male threaded portion 2fs is formed on the outer peripheral surface 2f of the bolt portion 2; a female threaded portion 3is that can be screwed into the male threaded portion 2fs is formed on the inner peripheral surface 3i of a circular hole portion 3h formed inside from the upper surface 3u of the nut portion 3 located at the upper end of the bolt portion 2; and an engagement surface 3fc with a polygonal surface that can be engaged with an external operating tool is formed on the outer peripheral surface 3f of the nut portion 3. The bolt portion 2 of the lower bolt with nut 1(n) is attached to the lower substrate P(n) side. Furthermore, the upper substrate P(n+1) is placed on the upper surface 3u of the nut portion 3 of the lower nut bolt 1(n), and the bolt portion 2 or fixing bolt 12 of the upper nut bolt 1(n+1), which is passed through a hole 11 provided in the upper substrate P(n+1), is screwed into the nut portion 3 of the lower nut bolt 1(n), thereby fixing the lower substrate P(n) and the upper substrate P(n+1). As a result, even a multi-stage substrate unit that connects multiple substrates P... in a laminated formation can be constructed with a small number of parts, and in particular, there is no need to prepare bolts of different lengths for each different substrate unit, making it easier to store and manage parts. Moreover, since the nut bolt 1 includes a cylindrical portion in part or all of it, sufficient mechanical strength and rigidity can be ensured.

[0055] Although preferred embodiments have been described in detail above, the present invention is not limited to these embodiments, and the details of the configuration, shape, materials, quantity, numerical values, etc. can be arbitrarily changed, added, or deleted without departing from the spirit of the present invention.

[0056] For example, the nut portion 3 is composed of a screw cylinder portion 31, an engaging cylinder portion 32, and an upper end surface portion 33, and an example configuration in which a gap is provided between the screw cylinder portion 31 and the engaging cylinder portion 32 is shown. However, a configuration without this gap, i.e., a configuration without the upper end surface portion 33, is also possible. Therefore, in this case, the outwardly bent flange portion 3e provided on the outer peripheral edge of the lower end of the nut portion 3 may be omitted. Furthermore, the bolt portion 2 is shown as having a hollow portion 5 that communicates with the circular hole portion 3h of the nut portion 3, but this does not exclude the case in which a male screw portion 2fs is formed on the outer peripheral surface 2f of a cylindrical shape without providing a hollow portion 5. In addition, it is desirable that the polygonal surface of the engaging surface 3fc be formed as a hexagonal surface 6, but this shape is arbitrary, and any polygonal surface can be applied. On the other hand, the substrate connector 10 is optional in that it uses a base substrate Po on the lower substrate P(n) which has a female screw portion Pos into which the bolt portion 2 is screwed; it is provided on the lower substrate P(n) which has a mounting block 13 fixed to the upper surface Pf of the substrate P(n) and which has a female screw portion Pes into which the bolt portion 2 is screwed; and a spacer member 14 is provided between the lower substrate P(n) and the upper substrate P(n+1) to set the distance between the lower substrate P(n) and the upper substrate P(n+1). It can be implemented in various forms that have similar functions. [Industrial applicability]

[0057] The nut-attached bolt and substrate connector according to the present invention can be used as bolts and nuts in various applications, including for joining (connecting) various substrates such as printed circuit boards. [Explanation of Symbols]

[0058] 1: Bolt with nut, 2: Bolt part, 2f: Outer surface of bolt part, 2fs: Male thread part, 3: Nut part, 3u: Top surface of nut part, 3h: Circular hole part, 3i: Inner surface of circular hole part, 3e: Flange part, 3f: Outer surface of nut part, 3is: Female thread part, 3fc: Engaging surface, 5: Hole part, 6: Hexagonal surface, 10: Substrate connector, 11: Hole part, 12: Fixing bolt, 13: Mounting block, 14: Spacer member, Fc: Coaxial, P: Substrate, P(n): Lower substrate, P(n+1): Upper substrate, Po: Base substrate, Pf: Top surface of substrate, Pos: Female thread part, Pes: Female thread part

Claims

1. A bolt with a nut, wherein the nut and bolt are integrated, the bolt portion located on the lower side and the nut portion located on the upper side are formed coaxially and integrally, a male threaded portion is formed on the outer circumferential surface of the bolt portion, a female threaded portion that can be screwed into the male threaded portion is formed on the inner circumferential surface of a circular hole formed inward from the upper surface of the nut portion located at the upper end of the bolt portion, and an engagement surface with a polygonal surface that can be engaged with an external operating tool is formed on the outer circumferential surface of the nut portion.

2. The nut bolt according to claim 1, characterized in that the nut portion has a flange portion formed by bending outward integrally on the outer peripheral edge of the lower end.

3. The bolt with nut according to claim 1, characterized in that the bolt portion has a hollow portion that communicates with the circular hole portion of the nut portion.

4. The bolt with a nut according to claim 1, characterized in that the engagement surface is formed as a polygonal surface, specifically as a hexagonal surface.

5. A substrate coupling device characterized by having a bolt portion on the lower side and a nut portion on the upper side formed coaxially and integrally, with a male thread portion formed on the outer circumferential surface of the bolt portion, and a female thread portion formed on the inner circumferential surface of a circular hole formed inward from the upper surface of the nut portion located at the upper end of the bolt portion, which can be screwed into the male thread portion, and an engagement surface formed by a polygonal surface on the outer circumferential surface of the nut portion that can be engaged with an external operating tool, wherein the bolt portion of the lower nut bolt is attached to the lower substrate side, the upper substrate is placed on the upper surface of the nut portion of the lower nut bolt, and the bolt portion or fixing bolt of the upper nut bolt passed through a hole provided in the upper substrate is screwed into the nut portion of the lower nut bolt to fix the lower substrate and the upper substrate.

6. The substrate connector according to claim 5, characterized in that the lower substrate comprises a base substrate having a female screw portion into which the bolt portion is screwed.

7. The substrate connector according to claim 5, characterized in that the lower substrate is provided with a mounting block having a female screw portion into which the bolt portion is screwed, which is fixed to the upper surface of the substrate.

8. The substrate connector according to claim 5, characterized in that a spacer member is provided between the lower substrate and the upper substrate to set the distance between the lower substrate and the upper substrate.

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