JP2001352184A - Structure of printed board unit device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent printed wiring boards from being deformedly moved in the directions vertical to their surfaces even through a vibrating shock or the like from the outside is exerted on the printed wiring boards in a printed board unit device. SOLUTION: The structure of a printed board unit device is formed in a structure that a frame body 81 formed by a method, where a frame part 2 on the periphery of the frame body 81 and coupling part 82 in the middle in the interior of the frame part and coupled with each other by coupling parts 4 and printed wiring boards 21 are mounted on the frame body 81 and are supported by this frame part 2 and the parts of the coupling parts 82, and coupling parts 82 of other frame body 81 adjoining the frame body 81 are coupled with each other to combine in a state that the frame bodies are juxtaposed with each other, whereby the intermediate surfaces of the wiring boards 21 are firmly supported by the frame body, that is, a case body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board unit device for various electronic / communication devices and measuring devices, which achieves a reliable and stable mechanical strength of a printed circuit board mounted on a moving body or the like. Regarding the structure.

A large number of printed wiring boards are mounted as electronic circuits on moving objects such as aircraft, vehicles, ships, etc., and on various types of equipment with vibrations and shocks, especially on devices mounted on artificial satellites. It is indispensable for a satellite to be mounted on an artificial satellite to reliably withstand strong acceleration, vibration and shock received from a propulsion engine or the like at the time of its launch.

[0003] The purpose of such a device is to mount it on a target device and endure it. It is required that the device be sufficiently resistant to vibration and impact test conditions that are higher than that, and actually implemented and confirmed. .

In practice, in addition to mechanical vibrations and shocks, consideration must be given to withstand changes in material properties due to changes in temperature conditions and other conditions of the external environment. And high mechanical rigidity and strength are also required.

For example, in an imaging device mounted on an artificial satellite and including a visible light region to an infrared region, a signal processing circuit including a large number of printed wiring boards is mounted as a printed board unit device.

[0006]

2. Description of the Related Art FIG. 8 is an external view of a frame for mounting and supporting a printed wiring board. FIG. 8A is a side view, and FIG. 8B is a front view. That is, FIG. 1A is a left side view as viewed from the left side of FIG. 1B. FIG.
9A is a top view as viewed from the opposite side and FIG. 9A is a top view as viewed from the near side, and FIG. 9B is a top view and FIG.
Is shown as a bottom view.

The frame body 1 basically includes a surrounding frame portion 2, a spacing member attaching portion 3 at two intermediate positions inside the frame portion 2,
A connecting portion 4 having a T-shaped cross section for connecting the space member attaching portion 3 and the frame portion 2 in the orthogonal direction is formed.

The frame portion 2 is so arranged that its outer periphery is surrounded by a thin wall surface 5 and its inner surface has the same height in the direction orthogonal to the plane of the drawing in FIG. The projection 6 and the second projection 7 are protruded, and the first projection 6 is provided with a screw hole 8 penetrating therethrough. The second projection 7 is shown in FIG. As shown in FIG. 9, a screw hole 9 is provided which is open to the periphery and penetrates.

The first projection 6 and the second projection 7 are connected by a step surface 11 having a constant height as shown in FIG. The thickness is increased to provide strength and constitutes a mounting surface of the printed wiring board.

As shown in FIG. 9, the upper surface and the lower surface each have a large width of a main portion of the wall surface 5, and connector mounting portions 12 to 15 for mounting an electric connector to this portion.
Are formed.

The spacing member mounting portion 3 is shown in an enlarged view of a cross section of a main part in FIG. 10 corresponding to FIG. 8, and a rectangular mounting surface 16 is protruded from a center portion of the connecting portion 4 which is orthogonal. In addition, a through hole 17 that penetrates the center of the mounting surface 16 is provided.

As shown in FIG. 10 (a), the spacing member mounting portion 3 is elongated in the up and down direction by one step lower than the mounting surface 16, and threaded holes 18 penetrate the upper and lower surfaces, respectively. And the height of the surface and the connecting portion 4 are set to be the same.

Further, as shown in FIG. 8, the frame 2, the spacing member attaching portion 3, and the connecting portion 4 are formed such that the right side surface is the same. In addition, the mounting surface of the printed wiring board of the step surface 11 constituted by the first protrusions 6 and the like, which is the left side surface, and the surface of the rectangular mounting surface 16 are formed on the same surface.

Referring to FIG. 11, a rectangular printed wiring board 21 is fitted into the surface of the first projection 6 which is the inner surface of the frame 1, and a mounting screw 22 is inserted through a mounting hole corresponding to the screw hole 8. It is inserted, screwed into the screw hole 8, and attached and fixed. Such a state is well shown in a sectional view of FIG.

Further, as shown in FIG. 11, electric connectors 23 to 26 are fixed to the connector mounting portions 12 to 15 formed on the upper and lower wall surfaces of the frame body 1 by screws, respectively. Are connected to the main circuit of the printed wiring board 21.

The intermediate portion of the printed wiring board 21 is
Contact the surface of the mounting surface 16 which is the same surface as the projection 6 of FIG. As shown in FIGS. 11 and 12, a similar through hole 27 coincides with the position of the through hole 17 on the mounting surface 16.
Are formed on the printed wiring board 21.

Referring to FIG. 12, on the right side of the frame 1, a shield plate 28 made of a thin rectangular metal plate having substantially the same shape as the printed wiring board 21 is provided in a mounting hole corresponding to the surrounding screw hole 8. With the mounting screw 29 inserted,
The first projection 6 is attached and fixed to the screw hole 8 from outside the right side surface.

The shield plate 28 is formed with a through hole 31 corresponding to the position of the through hole 17 of the spacing member mounting portion 3 and a screw insertion hole 32 corresponding to the position of the screw hole 18.

FIG. 13 is a perspective view showing the first spacing member 35. This first spacing member 35 has a rectangular flange 38 at one end of a cylindrical main body 37 having a through hole 36 penetrating the central portion, and screw insertion holes 39 for mounting are formed on both sides of the flange 38. And the through hole 3
6 has an insertion hole 4 on the side of the flange 38 which can insert and support a cylindrical body 41 made of a synthetic resin (for example, Teflon (registered trademark)).
2 are formed.

The first spacing member 35 is attached from the outside of the shield plate 28 of the frame 1 assembled as shown in FIG.

That is, the flange 38 of the first spacing member 35 into which the cylindrical body 41 is inserted is brought into contact with the shield plate 28, and the screw is inserted into the screw insertion hole 39 of the flange 38 and the screw insertion hole 32 of the shield plate 28. 43 is screwed into the screw hole 18 of the space member mounting portion 3 and tightened to be fixed. In this state, as is clear from the figure, the through hole 36 of the first spacing member 35 matches the through hole 17 of the frame 1.

FIG. 15 is a perspective view showing the second spacing member 45. This second spacing member 45 has a rectangular flange 48 at one end of a cylindrical main body 47 having a screw hole 46 penetrating the center part, and a screw insertion hole 49 for mounting is formed on both sides of the flange 48. ing.

The second spacing member 45 is attached from the outside of the shield plate 28 of the frame 1 assembled as shown in FIG.

That is, the state in which the flange 48 of the second spacing member 45 is in contact with the shield plate 28
The screw 43 is inserted through the screw insertion hole 49 of the No. 8 and the screw insertion hole 32 of the shield plate 28, and is screwed and fixed in the screw hole 18 of the space member attaching portion 3. This state is, as is clear from the figure, the second through hole 17 of the frame 1.
The threaded holes 46 of the spacing members of the two coincide.

As described above, the printed wiring board 2 is mounted on the frame 1.
1 and the state where the shield plate 28 is attached, the one where the first spacing member 35 is attached, and the second
And a combination of the two types of printed board units having the spacing member 45 attached thereto. However,
It should be understood that even if such a mechanical configuration is the same, the circuit function of the printed wiring board 21 is different.

FIG. 1 is a diagram showing an example of an apparatus configuration in which the above-configured printed board units are combined in a parallel state.
7 will be described with reference to a sectional front view. In FIG. 17, for the sake of easy understanding of the description, the opposite side of the drawing is the upper surface, the front side of the drawing is the lower surface or the bottom surface, the left side is the left side, the right side is the right side, and the front side of the drawing is the front side Alternatively, the front side and the back side are referred to as a back side. It should also be understood that the upper and lower intermediate portions between the upper and lower portions are broken and shortened to show only the essential portions.

Referring to FIG. 17, in this printed board unit apparatus, a board 53 is attached by screws 54 below a bottom board 51 via a support post 52 extending downward from the bottom board 51. A left side plate 55 and a right side plate 56 applied to both side surfaces of the substrate 51 and the substrate 53 are attached and coupled by screws 57 and 58, respectively.

The upper end surfaces of the left side plate 55 and the right side plate 56 are formed in a frame shape that is covered on all sides by attaching screws 62 on both sides.
Also, although not shown, a front plate on the front side, a back plate on the back side,
Is attached to form a box body covering six sides as a whole.

The bottom plate 51, the substrate 53, the left side plate 55, the right side plate 56, the front plate, the back plate, and the frame 1 described above are all required to be lightweight and have high rigidity. Thick aluminum alloy plate with high mechanical strength is cut and processed, and the screwed part is in the state of embedding the head of the screw by counterboring as shown in the figure, and the other parts are specifically shown in the whole However, it is formed in a thin-walled configuration having a rib shape as appropriate to ensure strength.

The screws and washers are all made of high-strength stainless steel, and all the screw holes of the frame 1 and the box are provided to secure and secure the strength. , A well-known helisert (trade name) is inserted by screwing.

A plurality of printed board units are incorporated in the state shown in the inside of the housing 63 made of such a box during the assembly thereof. The procedure and configuration will be described. First, the first spacing member 35 is attached to the spacing member attachment portion 64 on the inner surface side of the left side plate 55 with screws 65, and the bottom plate 51 and the top plate are attached to the left side plate 55. 61 is attached by screws 57 and 62, but is not loosely fixed but is temporarily loosened.

The left outer surface of the left side plate 55 is formed with a counterbore and a through hole having the same center as the through hole 36 of the first spacing member 35.

Next, the printed circuit board unit 67-1 in the state of FIG. 14 with the first spacing member 35 attached to the state of FIGS.
Is assembled to the right side in the drawing such that the surface of the left side plate 55 is in contact with the end surface of the first spacing member 35, and the screw holes 9 formed in the upper and lower end surfaces of the frame 1 of the printed board unit 67-1 are Screw 6 from bottom plate 51 and top plate 61
8 and 69 are inserted and screwed in, but also loosely temporarily tightened.

Further, the printed board unit 6 is moved to the right side in the figure.
7-2 in the same manner, and the frame 1
The screws 68 and 69 are inserted from the bottom plate 51 and the top plate 61 into the screw holes 9 on the upper and lower end surfaces, and screwed into a temporarily tightened state.

Next, the printed circuit board unit 71 in the state of FIG. 16 with the second spacing member 45 attached to the state of FIG. 11 and FIG. 2 to the right side in the drawing so as to be in contact with the end face of the first spacing member 35, and similarly to the screw holes 9 formed in the upper and lower end faces of the frame 1, the screws 68, Insert 69 and screw loosely to temporarily tighten.

To the right of the printed board unit 71, a first
Printed board unit 67-
3, 67-4, and 67-5 are combined in the order shown to form the illustrated state, and similarly attached to the bottom plate 51 and the top plate 61 with screws 68 and 69.

In this state, the rightmost part in FIG.
2, the shield plate 28 and the first spacing member 3
5 is attached to the surface of the printed circuit board 21 of the printed circuit board unit 72 to which the printed circuit board unit 67-
5 and are attached to the bottom plate 51 and the top plate 61 by screws 68 and 69 in the screw holes 9 on the upper and lower end surfaces of the frame 1.

Finally, the right side plate 56 is aligned with the right side surface of the printed board unit 72, and a screw 73 is inserted into the right outer surface of the printed board unit 72 from the mounting hole provided with the mounting hole, and the mounting portion 3 of the printed board unit 72 is inserted. Screw hole 1
The screw 62 is screwed into the screw hole of the upper end face, and the screw 62 is screwed from the upper surface plate 61, and the screw 58 is screwed into the side surface of the bottom plate 51 and the substrate 53 from the right side.

The right side plate 56 also has a through hole 1 formed in the mounting portion 3 of the printed board unit 72.
A through hole having the same center as that of 7 is formed.

A front plate and a back plate (not shown) are attached to screw holes 9 formed on the front and rear end surfaces of the frame 1 of the combined printed board unit, respectively, via screws. 53, left and right side plates 5
5, 56 and the upper surface plate 61 are also attached via screws.

As described above, the printed board unit is incorporated into the housing 63. In this state, the mounting screws between the housings 63 are loosely temporarily tightened and are not firmly connected. , The shape of the housing 63 is formed and maintained, and the through holes 36 of the first spacing members 35 of the respective printed board units are in a straight line penetrating state, and the screw holes of the second spacing members 45 are provided. 46 is similar.

Since the second spacing member 45 is located at an intermediate position of the whole, the long fastening screw 75 is inserted from the through hole of the left side plate 55 to the left of the screw hole 46 of the second spacing member 45. Screwed in. Similarly, a long fastening screw 76 is inserted from the through hole of the right side plate 56 and screwed into the right side of the screw hole 46 of the second spacing member 45.

By tightening these fastening screws 75 and 76 in an appropriate state, the respective spacing members 35 and
Since the end surface of 45 is pressed against the surface of the adjacent printed wiring board 21, the assembly is completed by firmly tightening all the connection screws constituting the housing 63 and the connection screws to the frame 1 from the outside. I do.

As described above, the printed wiring board 21 of the printed circuit board unit is fixed by screwing the periphery thereof around the inner surface of the frame 1, and an intermediate portion thereof is the surface of the mounting surface 16 of the spacing member mounting portion 3. And the end surfaces of the spacing members 35 and 45 are sandwiched and connected to each other, so that movement in a direction perpendicular to the surface is suppressed, and the movement and deformation expanded further in response to external vibration and shock. Does not occur.

The inner diameter of the cylindrical body 41 inserted into the first spacing member 35 is set smaller than the inner diameter of the through hole 36 of the main body 37, so that the fastening screws 75, 76
Even if the vibration or the like causes resonance or the like and attempts to vibrate in the direction perpendicular to the axial direction, the metal body portion is made of a metal by a suppressing effect and a buffering effect by being brought into contact with the synthetic resin cylinder 41 which is more flexible and elastic than metal. Care is taken not to generate fine metal powder due to contact with 37.

The electromagnetic shielding between the individual printed wiring boards 21 of the printed board unit is reliably shielded by the shield plate 28 attached to the frame 1. The housing 63 is made of a metal material, is in surface contact with each other, and is tightly fastened by screws, so that it has a reliable hermetic structure and is reliably shielded from the outside.

In FIG. 17, the portion indicated by reference numeral 77 which is opened on the lower surface of the substrate 53 is a mounting screw hole for screwing and fixing the apparatus to a place where the apparatus is installed.

[0048]

According to the above-mentioned conventional printed circuit board unit, the printed wiring board 21 is clamped and fixed so that the central part of the printed circuit board 21 does not move freely due to vibration and shock. . For this purpose, fastening screws 75 from both sides into the screw holes 46 of the second spacing member 45 at the center,
76 is inserted, screwed in, tightened and fixed.

In practice, it is possible to insert and insert a single screw and tighten and fix it at both ends. However, since the shaft of the screw becomes longer, the screw is screwed based on the torsional stress caused by the tightening. In order to avoid this, it is necessary to tighten the two fastening screws 75 and 76 from both sides to avoid the problem. However,
Even if such a problem cannot be ruled out, there is no practical problem.

Further, even if the printed wiring board 21 made of a synthetic resin material is interposed between metal materials and directly fastened and tightened, a minute compressive deformation due to plastic deformation may occur in a long term. There is no problem with the current practical requirements.

In the assembling process, the fastening screws 7 must be assembled after combining a plurality of printed board units.
The same applies to the case where the screws 5 and 76 cannot be tightened and the assembly screws for the entire housing 63.

However, in view of the demands for further enhancement of mechanical strength and long-term reliability in the future, it is preferable to improve the device structure that is more mechanically stable.

Accordingly, the present invention has been made in view of the structure of such a conventional printed circuit board unit apparatus, and has as its object to provide a printed circuit board unit apparatus which is stable in mechanical strength and structure and excellent in stability as described above. It is an object of the invention.

[0054]

The basic structure of the first aspect of the present invention for solving the above problems is that a connection between a surrounding frame portion and a middle intermediate portion is made by a connecting portion. And a printed wiring board attached to and supported by the frame body. The printed wiring board is attached and supported by a frame portion and a joint portion of the frame body, and the joint portion of the frame body is adjacent to the printed circuit board. To be connected and connected to a connecting portion of another frame body or an apparatus housing.

According to the first solution, the printed wiring board of the printed circuit board unit is attached to the frame portion around the frame and the joint portion, and the printed circuit board unit is connected to the adjacent frame members. Since this is performed by directly connecting and connecting the portions or the connecting portion and the device housing, a strong mechanical connection state is obtained by the connection between the connecting portion made of a metal material or between the device housings.

The gist of the second means of the present invention is that a frame formed by connecting a peripheral frame and an inner intermediate connecting portion by a connecting portion, and a printed wiring board mounted and supported by the frame. The printed wiring board is mounted and supported by a frame portion and a joint portion of the frame, and the plurality of such frames are connected to and joined to the joints of adjacent frames. Are connected in parallel.

According to the second solution, the printed wiring board of the printed circuit board unit is attached to the frame portion around the frame and the joint portion, and the adjacent portions of the plurality of printed circuit board units are interconnected. By directly connecting and connecting the parts, a strong mechanical connection state is obtained by connecting the respective connecting parts made of a metal material.

The peripheral side surfaces of the frame in the first means and the second means are respectively attached to the apparatus housing, so that the entire printed board unit is supported and fixed in a stable state.

[0059]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a printed circuit board unit according to a preferred embodiment of the present invention; It is to be noted that the same portions are denoted by the same reference numerals for the sake of convenience for easy understanding throughout the drawings.

FIG. 1 is an external view of a frame 81 applied to a printed board unit according to the present invention. FIG. 1 (a) shows a left side, and FIG. 1 (b) shows a front. This frame 81 is basically the same as the conventional structure shown in FIG.
Is different. Therefore, the description of the portions of the frame portion and the connecting portion is given the same reference numerals as in the related art. Also, the top view as viewed from the opposite side and the bottom view as viewed from the near side in FIG.

The frame 81 is composed of the surrounding frame 2 and the frame 2.
And a connecting portion 4 having a T-shaped cross section for connecting the connecting portion 82 and the frame portion 2 in a direction orthogonal to each other.
And consisting of

The frame portion 2 is such that its outer periphery is surrounded by a thin wall surface 5 and its inner surface has the same height in the direction perpendicular to the paper surface in FIG. The projection 6 and the second projection 7 are protruded, and the first projection 6 is provided with a screw hole 8 penetrating therethrough. The second projection 7 is shown in FIG. As shown in FIG. 9, a screw hole 9 is provided which is open to the periphery and penetrates.

The first projection 6 and the second projection 7 are connected to each other by a step surface 11 having a constant height, as shown in FIG. The thickness is increased to provide strength and constitutes a mounting surface of the printed wiring board.

As shown in FIGS. 9 (b) and 9, the upper surface and the lower surface each have a large width of the main part of the wall surface 5 and a connector mounting part 12 for mounting an electric connector on this part.
To 15 are formed.

The connecting portion 82 is shown in an enlarged view of a cross section of a main part in FIG. 2 corresponding to FIG. 1. The connecting portion 4 has an octagonal column shape in a central portion orthogonal to the connecting portion 4 and has a connecting surface on the front end surface. The projection 83 is formed to project toward the left side. In addition,
2, (a) is a front view, and (b) is (a) in FIG.
(C) shows the right side of FIG. (A).

Above and below the connecting portion 82, a lower mounting surface 84 is formed so as to be continuous as a portion of the connecting portion 82, together with a screw hole 85 penetrating left and right. The mounting surface 84 is set at the same height as the step surface 11 of the frame 2.

As shown in FIG. 8B, the connecting surface 83 of the connecting portion 82 is formed at an equal radius from the center at intervals of 120 °.
Three screw insertion holes 86 are formed together with counterbore holes 87 from the right side.

As shown in FIG. 9C, screw holes 88 are formed on the right side at three positions symmetrical to the screw insertion holes 86.

Referring to FIG. 3, FIG. 3A is a front view, FIG. 3B is a left side of FIG. 3A, and FIG. 3C is a right side of FIG. It is. However, in contrast to FIG. 2, in FIG. 3, the positions of the screw insertion holes 86 and the screw holes 88 formed in the coupling surface 83 of the coupling portion 82 are formed at positions rotated by 180 ° with respect to the paper surface. Are different. There is no difference in the position of the mounting surface 84 and the screw hole 85 formed in the surface, other shapes, and the like.

From this, reference numeral 81 is attached to the frame 81 of FIG.
-1 is given to the first frame, the joining portion of the first frame is given to the first joining portion 82-1, and the frame shown in FIG. The body and the connecting portion of the second frame are referred to as a second connecting portion 82-2 and will be identified in the following description. Therefore, the frame of FIG. 1 is 81-1;
1 to 3 are shown with the above reference numerals.

Referring to FIG. 4, square printed wiring board 21 is fitted into frame 81, that is, the surface of first projection 6 which is the inner surface of first frame 81-1, and corresponds to screw hole 8. A mounting screw 22 is inserted through the mounting hole to be screwed, and screwed into the screw hole 8 to be mounted and fixed. Such a state is well shown in the cross-sectional view of FIG.

Further, as shown in FIG. 4, electric connectors 23 to 26 are respectively attached and fixed to the connector attaching portions 12 to 15 formed on the upper and lower wall surfaces of the frame body 81-1 by screws. The lead terminals of the electric connector are connected to the main circuit of the printed wiring board 21.

The intermediate portion of the printed wiring board 21 is
The screw 91 is inserted into a screw insertion hole provided on the surface of the printed wiring board 21 because the screw 91 is in contact with the surface of the mounting surface 84, which is the same surface as the projection 6 of FIG. Screw it into the hole 85 and fix it.

The printed wiring board 21 attached to the frame 81 is different from the conventional one in that it has a through hole through which the connecting portion 82 can be inserted, and a screw insertion hole for a screw 91 to be attached to the attachment surface 84. Are different.

Referring to FIG. 5, on the right side of the frame 81, a shield plate 28 made of a thin metal plate having a substantially same shape as the printed wiring board 21 and having a rectangular shape is provided in a mounting hole corresponding to the surrounding screw hole 8. With the mounting screw 29 inserted,
The first projection 6 is attached and fixed to the screw hole 8 from outside the right side surface.

The shield plate 28 has a through hole 92 of a size and shape into which the coupling portion 82 can be inserted, unlike the conventional one.
A screw insertion hole is formed at a position corresponding to the screw hole 85, and the screw insertion hole is attached and fixed to the coupling portion 82 by a screw 93.

As described above, the first frame 81-1
A printed circuit board 21 and a shield plate 28 are attached to the second frame 81-2, and a printed circuit board 21 and a shield plate 28 are attached to the second frame 81-2.
The combination of the two types of printed board units is configured. It should be understood that the circuit function of the printed wiring board 21 is different even with such a mechanical configuration.

FIG. 6 is a diagram showing a combined apparatus configuration in which the printed board units having the above-described configurations are combined in parallel.
Will be described with reference to the front view cross-sectional view of FIG. In addition,
In FIG. 6, for convenience of explanation, the opposite side of the drawing is the upper surface, the front side of the drawing is the lower surface or the bottom surface, the left side is the left side, the right side is the right side, and the front side of the drawing is the front side. Alternatively, the front side and the back side are referred to as a back side. It should also be understood that the upper and lower intermediate portions between the upper and lower portions are broken and shortened to show only the main portions.

Referring to FIG. 6, in this printed board unit apparatus, a board 53 is attached by screws 54 below a bottom board 51 via a support post 52 extending downward from the bottom board 51. A left side plate 55 and a right side plate 56 applied to both side surfaces of the substrate 51 and the substrate 53 are attached and coupled by screws 57 and 58, respectively.

The upper end surfaces of the left side plate 55 and the right side plate 56 are formed into a frame shape in which four sides are covered by attaching screws 62 on both sides.
Also, although not shown, a front plate on the front side, a back plate on the back side,
Is attached to form a box body covering six sides as a whole.

The bottom plate 51, the substrate 53, the left side plate 55, the right side plate 56, the front plate, the rear plate, and the frame 81 described above all have a light weight and a high rigidity as in the prior art. From the necessity, aluminum alloy plate with high pneumatic mechanical strength is cut and processed, the screwed part is in the state of embedding the head of the screw by counterboring as shown in the figure, and the other parts are concrete as a whole Although not shown, it is formed in a thin-walled wall configuration having a rib shape as appropriate to secure the strength.

The screws and washers are all made of high-strength stainless steel. The frame 81 and all the screw holes of the box are used to secure and secure the strength. The heli-sert is screwed in and inserted.

A plurality of printed board units are assembled in the state shown in the inside of the housing 63 having such a box during the assembly. Describing the procedure and configuration, first, the bottom plate 51 and the front plate or the back plate are assembled and connected to the left side plate 55. Alternatively, the upper surface plate 61 and the front plate or the rear plate are assembled and coupled to the left side plate 55.

In this way, the purpose is to secure an orthogonal plane by combining the bottom plate 51 or the top plate 61 with the front plate or the back plate with reference to the left side plate 55. The procedure will be described below as a combination of the bottom plate 51 and the back plate.

The first frame assembled to the second frame 81-2
Connecting portion 82-2 of the printed board unit 95-1 of FIG.
Is aligned with the surface of the mounting portion 96 of the left side plate 55, and the mounting screw 97 is
Into the screw hole 98 formed in the mounting portion 96.
Screwed together.

The screw holes 98 of the mounting portion 96 are formed at three positions so as to match the positions of the counterbore holes 87 of the second coupling portion 82-2 and the screw insertion holes 86. The connection with the screw 97 is performed.

At the same time, the screw holes 9 on the peripheral side surface of the second frame 81-2 of the first printed board unit 95-1 are tightened by the bottom plate 51 and the screws 68 in a connected state. The screw 68 is loosely temporarily tightened. Similarly, the back plate is connected by screws.

Next, the connecting surface 83 of the first connecting portion 82-1 of the second printed board unit 95-2 assembled on the first frame 81-1 is moved to the first printed board unit 9
The mounting screw 97 is inserted into the counterbore hole 87 of the connecting portion so as to be aligned with the right end face of the connecting portion of 5-1 and the screw hole 8 formed in the connecting portion of the first printed circuit board unit 95-1 is formed.
8 and screw together.

What can be joined in this manner is that the right end face of the joining portion of the second frame 81-2 has a screw hole 88 at an equilateral triangular position as shown in FIG. 3C. This is the vertex position, and the position of the screw insertion hole 86 of the connection portion of the first frame 81-1 is the same as shown in FIG. Screw 9 in hole 87
7 can be screwed in by inserting it.

Similarly, the second printed board unit 9
The screw hole 9 on the peripheral side surface of the first frame body 81-1 of 5-2 is loosely tightened by the bottom plate 51 and the screw 68 to make a temporary tightening state, and the back plate is also connected in the same state.

Subsequently, the connecting surface 83 of the second connecting portion 82-2 of the third printed board unit 95-3 assembled on the second frame 81-2 is moved to the second printed board unit 9
The mounting screw 97 is inserted through the counterbore hole 87 of the connecting portion so that the screw hole 8 is formed in the connecting portion of the second printed board unit 95-2.
8 and screw together.

This means that the right end face of the joint portion of the first frame 81-1 has a screw hole 8 as shown in FIG.
8 is the position of each vertex of the inverted regular triangle, and the position of the screw insertion hole 86 at the joint of the second frame 81-2 is the same as shown in FIG. 3C. By inserting the mounting screw 97 into the counterbore hole 87 that is matched and combined, the screw-in connection can be made.

The third printed board unit 95-3 is also temporarily tightened into the screw holes 9 on the peripheral side surface of the second frame 81-2 by the bottom plate 51 and the screws 68. The back plate is also connected in the same manner.

According to the above-described procedure, although the following detailed description is omitted, the fourth printed circuit board unit 95-
4. Fifth printed board unit 95-5, sixth printed board unit 95-6, seventh printed board unit 95
-7 can be connected by the mounting screw 97, connected to the bottom plate 51 by the screw 68, and screwed to the back plate.

This is because the frame of the fourth printed circuit board unit 95-4 is the first frame 81-1.
Of the printed circuit board unit 95-5 is the second frame 81
-2, the frame of the sixth printed board unit is the first frame 8
1-1 and the frame body of the seventh printed board unit 95-7 are the second frame body 81-2, so that they can be assembled in combination. However, the shield plate 28 is not attached to the seventh printed board unit 95-7.

The right side plate 56 is applied to the right side of the seventh printed board unit 95-7, and the end surface of the bottom plate 51 is connected to the right side plate by screws 58. A screw 102 is inserted into a screw insertion hole formed in the attachment portion 101 of the right side plate 56 and coincides with the screw hole 88 of the second coupling portion 82-2 of the seventh printed board unit. Join.

In this state, the upper plate 61 is
2, 69 and the peripheral side surface of the frame body 81 of each printed board unit 95 are connected to each other by screws 69, and the front plate is attached in the same manner, and all screws are firmly tightened. The housing 53 is also configured by mounting the substrate 53.

When the bottom plate 51 and the rear plate are joined to the left side plate 55 during assembly, the mutual positional relationship is orthogonal.
This is to prevent the positions of the frame bodies 81 arranged side by side using the orthogonal plane as the reference plane from being coincident with each other when the parts are sequentially mounted, and to prevent a positional shift from occurring.

Electromagnetic shielding between the individual printed wiring boards 21 of the printed board unit is reliably shielded by the shield plate 28 attached to the frame 1. The housing 63 is made of a metal material, is in surface contact with each other, and is tightly fastened by screws, so that it has a reliable hermetic structure and is reliably shielded from the outside.

In FIG. 6, the portion indicated by reference numeral 77 which is opened on the lower surface of the substrate 53 is a mounting screw hole for screwing and fixing the apparatus to a place where the apparatus is installed.

As described above, the printed circuit board units are incorporated in the housing 63 in parallel, and the printed wiring board of the printed circuit board unit is screwed around the inner surface of the frame 81. It is fixed, and its intermediate portion is screwed and fixed to the mounting surface 84, which is a portion of the coupling portion 82, so that movement in the surface direction is suppressed, and furthermore in response to external vibration shock No enlarged movement or deformation occurs.

The joints 82 are connected in series in a tandem state without any intervening printed wiring board as in the prior art, and a solid joint is formed between the integrated metal surfaces by screws. Is kept stable. Because of the integral joints 82, the accuracy of the dimensions for stacking the members as in the prior art is guaranteed.

FIG. 7 shows a second embodiment of the connecting portion of the present invention, and is a portion corresponding to FIG. 2A and 2B, FIG. 2A is a front view, FIG. 2B is a left side of FIG. 2A, and FIG. 2C is a right side of FIG. 2A. Is shown.

At the top and bottom of the connecting portion 105, a lower mounting surface 84 is formed so as to be continuous as a portion of the connecting portion 105, together with a screw hole 85 penetrating left and right. The mounting surface 84 is set at the same height as the step surface 11 of the frame 2.

As shown in FIG.
In the coupling surface 83, two screw insertion holes 86 are formed at an equal radius of 180 ° from the center together with a counterbore hole 87 from the right.

As shown in FIG. 9C, two screw holes 88 are formed on the right side at two positions 90 ° from the screw insertion holes 86.

The frame 81 having the connecting portion 105 according to this embodiment is also
In this case, it is necessary to use a combination of printed board units composed of frames 81 in which the positions of the screw insertion holes 86 and the screw holes 88 are interchanged.

By using the connecting portion 105, FIG.
By using two connecting screws between the adjacent portions as compared with the connecting portion 82, the size in a side view can be reduced. However, when a stronger connection is required, adopting a larger screw diameter or increasing the number of screws can be arbitrarily applied.

According to the above-described embodiment, the number of the printed board units having the printed wiring board is seven, but
The present invention is not limited to this, and can be applied to at least one unit or more, and it can be applied to one or more optimal portions instead of two at the joint portion. It is.

[0110]

As described above in detail, according to the printed board unit device structure of the present invention, a frame body connected by a connecting portion to a middle connecting portion inside a surrounding frame portion; A printed wiring board attached to and supported by the frame;
The printed wiring board is attached to and supported by the frame portion and the joint portion of the frame body, and the joint portion of the frame body is connected and joined to the joint portion of another adjacent frame body or the device housing. By this, the printed wiring board of the printed circuit board unit is attached to the frame portion around the frame and the portion of the joint,
Since the connection of the printed board units is performed by directly connecting and connecting the connecting portions of the adjacent frame bodies or the connecting portion and the device housing, the connection between the connecting portion made of a metal material or the connection between the device housings is performed. , A strong mechanical connection is obtained.

Even when a plurality of printed circuit board units are arranged in parallel, a strong structure can be obtained by connecting the connecting portions of the respective frames. In addition, a reliable holding state can be obtained by attaching the peripheral side surface of the frame to the device housing.

As described above, according to the present invention, long-term stable mechanical rigidity and strength are guaranteed, and when applied to various devices subjected to vibration and impact, its practical effect on printed wiring boards is extremely remarkable. It is something.

[Brief description of the drawings]

FIG. 1 is an external view of a frame according to the present invention.

FIG. 2 is an enlarged view of a main part of a first connecting portion.

FIG. 3 is an enlarged view of a main part of a second coupling part.

FIG. 4 is a side view showing a state where a printed wiring board is attached to a first frame.

FIG. 5 is a sectional view of a main part in a front view in the state of FIG. 4;

FIG. 6 is a sectional view of a main part of the printed board unit device of the present invention as viewed from the front.

FIG. 7 is a second embodiment of the connecting portion of the frame according to the present invention.

FIG. 8 is an external view of a conventional frame (part 1).

FIG. 9 is an external view (part 2) of a conventional frame.

FIG. 10 is an enlarged view of a main part of a space member attaching portion.

FIG. 11 is a side view showing a state where a printed wiring board is attached to a conventional frame.

12 is a cross-sectional view of a main part in a front view in the state of FIG. 10;

FIG. 13 is a perspective view of a first spacing member.

14 is a cross-sectional view of a main part in a front view in which a first spacing member is attached to the frame in the state of FIG. 11;

FIG. 15 is a perspective view of a second spacing member.

16 is a cross-sectional view of a main part in front view in which a second spacing member is attached to the frame in the state of FIG. 11;

FIG. 17 is a cross-sectional view of a main part of a conventional printed circuit board unit as viewed from the front.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Frame body 2 Frame part 3 Interval member attachment part 4 Connecting part 5 Wall surface 6 First projection 7 Second projection 8, 9 Screw hole 11 Step surface 12-15 Connector attachment part 16 Mounting surface 17 Through hole 18 Screw hole 21 Printed wiring board 22 Mounting screw 23 to 26 Electrical connector 27 Through hole 28 Shield plate 29 Mounting screw 31 Through hole 32 Screw insertion hole 35 First spacing member 36 Through hole 37 Main body 38 Flange 39 Screw insertion hole 41 Cylindrical body 42 Insert Hole 43 Screw 45 Second spacing member 46 Screw hole 47 Body part 48 Flange 49 Screw insertion hole 51 Bottom plate 52 Support 53 Board 54 Screw 55 Left side plate 56 Right side plate 57, 58 Screw 61 Top plate 62 Screw 63 Housing 64 Interval Member mounting part 65 Screw 67 (-1 to -5) Printed board unit 68, 69 71 Printed board unit 72 Printed board unit 73 Screw 75, 76 Fastening screw 77 Mounting screw hole 81 Frame body 82 Connecting portion 83 Connecting surface 84 Mounting surface 85 Screw hole 86 Screw insertion hole 87 Counterbore hole 88 Screw hole 91 Screw 92 through-hole 93 screw 95 (-1 to -7) (first to seventh) printed board unit 96 mounting part 97 mounting screw 98 screw hole 101 mounting part 102 screw 105 connecting part

Claims (3)

[Claims] 1. A frame body which is connected by a connecting portion between a peripheral frame portion and a connecting portion intermediate inside the frame portion, and which mounts and supports a printed wiring board by the frame portion and the connecting portion; A printed wiring board attached to and supported by a body, wherein the joint of the frame to which the printed wiring board is attached is connected and joined to a joint of another adjacent frame or a device housing. Printed circuit board unit device structure. 2. A frame body which is connected by a connecting portion between a surrounding frame portion and a connecting portion in the middle of the frame portion, and which mounts and supports a printed wiring board by the frame portion and the connecting portion; And a printed wiring board attached to and supported by the body, wherein the plurality of frames attached with the printed wiring board are connected in a joining state of adjacent frames so that the plurality of frames are connected in parallel. A printed circuit board unit device structure. 3. The printed board unit device structure according to claim 1, wherein a peripheral side surface of the frame is attached to the device housing.