JP2007298727A - Apparatus with built-in wiring board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus with a built-in wiring board, which enables the number of components thereof and that of manufacturing steps thereof to be reduced. <P>SOLUTION: The apparatus with the built-in wiring board (liquid crystal display device) 1A is equipped with a backlight 2A, a liquid crystal display panel 3, a flexible wiring board 4A, and a conductive cover 6A. The flexible wiring board 4A has a land 5Aa connected to the ground wire of the board 4 on a face of a tongue 5 opposite to the cover 6A. The cover 6A has a hook 7A in contact with the land. As a result, the flexible wiring board 4A and the conductive cover 6A are directly connected and made conductive to each other without using a separate connector, and the manufacturing cost of the liquid crystal display device 1A (apparatus with the built-in wiring board) is reduced accordingly. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a device with a built-in wiring board, and in particular, a liquid crystal display panel (first circuit) and an FPC (flexible wiring board) are accommodated in a casing of a backlight and covered with a conductive cover. The present invention relates to a wiring board built-in device that can be suitably used for a liquid crystal display device.

  As shown in FIG. 5, the conventional liquid crystal display device 101 includes a backlight 102, liquid crystal display panels 103 and 115, a flexible wiring board 104, and a cover 106. When the conventional liquid crystal display device 101 is a double-sided liquid crystal display device, a partition plate 102b is formed inside the casing 102a of the backlight 102 so as to partition the upper portion and the lower portion thereof, and below the partition plate 102b. An optical film 112, a light guide plate 113, and an LED (light emitting diode) 114 are disposed (see Patent Document 1).

  On the upper side and the lower side of the backlight 102, two liquid crystal display panels 103 and 115 having different sizes are stacked. The large liquid crystal display panel 115 is disposed below the light guide plate 113. In addition, the small liquid crystal display panel 103 is stacked by being fitted into an opening frame 102e formed in the partition plate 102b in order to supply light emitted from the LEDs 114 to the upper side through the light guide plate 113.

  The flexible wiring board 104 is connected to the upper side of the casing 102a of the backlight 102 together with the liquid crystal display panel 103 in order to connect other circuits such as a drive circuit and a control circuit to the two liquid crystal display panels 103 and 115, respectively. It is stored. Here, the flexible wiring board 104 has a conductive pattern and a ground line (not shown) for connecting other circuits to the liquid crystal display panels 103 and 115. Further, a metal connector 116 disposed so as to protrude in the stacking direction (the normal direction of the flexible wiring board 104) is connected to the ground line. In order to reduce the size of the liquid crystal display device 101, a drive IC 109 as a drive circuit is disposed on the surface of the flexible wiring board 104.

  The cover 106 is disposed so as to cover the small liquid crystal display panel 103 and the flexible wiring board 104 from above. The cover 106 is formed of stainless steel or the like so as to cover the upper side of the housing 102a while exposing the display portion of the small liquid crystal display panel 103, and can be used when the cover 106 is disposed on the housing 102a. It is disposed at a position in contact with the connector 116 attached to the flexible wiring board 104.

  Thus, in the conventional liquid crystal display device 101, the connector 116 is formed by covering the small liquid crystal display panel 103 and the flexible wiring board 104 housed in the casing 102 a of the backlight 102 with the conductive cover 106. Since the ground wire of the flexible wiring board 104 and the conductive cover 106 are electrically connected, the conductive cover 106 is not used only as a covering member, but ESD (electrostatic discharge) countermeasures and noise countermeasures are taken. It can also be used as a functional member that can be used.

JP 2004-219985 A

  However, in the conventional liquid crystal display device 101, in order to make the flexible wiring board 104 and the cover 106 conductive, the connector 116 must be individually attached to the ground line of the flexible wiring board 104. The manufacturing process increased.

  Further, in the conventional liquid crystal display device 101, the connector 116 is disposed so as to protrude in the normal direction of the flexible wiring board 104, so that the liquid crystal display device 101 becomes thicker by the thickness of the connector 116. There was a problem that.

  Further, as shown in FIG. 6, the contact portion of the connector 116 is formed so as to protrude in the same direction as the normal direction of the flexible wiring board 104, so that the drag generated by the contact between the connector 116 and the cover 106 is reduced. There is a problem in that it acts in a direction opposite to the protruding direction of the protruding portion of the connector 116 (a direction parallel to the normal direction of the flexible wiring board 104). As shown in FIGS. 5 and 6, soldered electronic components such as the connector 116 and the driving IC 109 of the liquid crystal display panels 103 and 115 are attached on the surface of the flexible wiring board 104. An optical film 112 is attached below the thin partition plate 102b of the backlight 102 on which the flexible wiring board 104 is placed. For this reason, when the flexible wiring board 104 is bent due to the above-described drag, electronic components such as the drive IC 109 soldered to the flexible wiring board 104 may be peeled off. It was. In addition, when the partition plate 102b is bent through the flexible wiring board 104, the optical film 112 attached below the partition plate 102b is also bent together. There was also a risk of causing this.

  Accordingly, the present invention has been made in view of these points, and an object thereof is to provide a wiring board built-in device that can reduce the number of parts and the manufacturing process.

  Further, the present invention can reduce the thickness of the device with a built-in wiring board and adversely affect the wiring board and its peripheral members even if the conductive cover is conducted to the ground line of the wiring board. Another object is to provide a device with a built-in wiring board that can be prevented.

  In order to achieve the above-described object, a wiring board built-in device according to the present invention includes, as a first aspect, a housing that houses a first circuit, a first circuit that is housed in the housing, and a first circuit. A flexible wiring board for connecting a second circuit other than the circuit; and a conductive cover for partially or entirely covering the first circuit and the flexible wiring board housed in the housing. The flexible wiring board has a land that is connected to a ground line formed on the flexible wiring board on a surface facing the cover, and the cover includes the first circuit and the flexible circuit board. It has a protrusion that contacts the land when the wiring board is covered. In addition, a wiring board built-in apparatus means the electronic device by which the wiring board is arrange | positioned inside the housing | casing.

  According to a second aspect of the present invention, in the wiring board built-in device according to the first aspect, the cover is formed in a shape covering the side surface of the box formed in a box shape, and the land is a flexible wiring. It is formed on the surface of the tongue piece that protrudes from the peripheral edge of the plate, and is disposed between the side surface of the housing and the side surface of the cover by bending the tongue piece so as to be in contact with the side surface of the cover. It is characterized by being.

  According to a third aspect of the present invention, in the wiring board built-in device according to the first or second aspect, the protrusion is formed by partially cutting the inside of the cover or by protruding from the periphery of the cover. It is characterized in that a part of the cover is formed in a hook shape that is bent inside the cover.

  According to a fourth aspect of the present invention, in the device with a built-in wiring board according to the second or third aspect, the casing is a part of a side surface of the casing and is in contact with the tongue piece by bending the tongue piece. A groove portion having a width and a depth capable of accommodating the tongue piece is provided.

  According to a fifth aspect of the present invention, in the wiring board built-in device according to any one of the first to fourth aspects, the cover is in the vicinity of the protrusion and can confirm contact between the protrusion and the land. It is characterized by having a confirmation window.

  According to the first aspect of the present invention, the flexible wiring board and the conductive cover can be directly connected and conducted, so that the flexible wiring board and the cover are conventionally attached to conduct. There is an effect that it is possible to reduce the manufacturing cost of the device with a built-in wiring board by eliminating the need for attaching the connector that has been used.

  According to the 2nd aspect of this invention, since the protrusion part of a cover is arrange | positioned by the side of the apparatus with a built-in wiring board, the thickness of the apparatus with a built-in wiring board can be made thin. According to the second aspect of the present invention, the protrusion of the cover is in contact with the tongue of the flexible wiring board, and even if the tongue is deformed by external addition, the flexible wiring board Since the portions other than the tongue pieces are difficult to bend, it is possible to prevent the flexible wiring board and other films laminated on the flexible wiring board from being bent due to contact with the protrusions of the cover. . Thereby, there is an effect that it is possible to prevent an adverse effect caused by the deflection from being exerted on the flexible wiring board or other films. For example, when an IC is connected to a flexible wiring board, peeling of the IC can be prevented, and when the other film is an optical film used for a backlight of a liquid crystal display device, the deflection of the optical film It is possible to prevent unevenness of light.

  According to the third aspect of the present invention, an appropriate elastic force can be applied to the protrusion of the cover, so that the protrusion can be reliably connected to the land, and a flexible wiring board or There is an effect that it is possible to prevent an unnecessarily large contact force (drag) from being applied to a housing that contacts the flexible wiring board. Further, when the hook-shaped protrusion is formed on the side surface of the cover, there is an effect that the hook-shaped protrusion can also be used as an engaging portion between the housing and the cover.

  According to the fourth aspect of the present invention, since the entire tongue piece is accommodated in the groove portion, even if the tongue piece is interposed between the side surface of the housing and the side surface of the cover, the cover protrudes outward by the tongue piece. It is possible to prevent the cover from being deformed and to prevent the cover from being detached from the housing.

  According to the fifth aspect of the present invention, since the contact between the protrusion and the land can be visually confirmed, there is an effect that the yield of the wiring board built-in device can be improved.

  Hereinafter, the circuit board built-in device of the present invention will be described with reference to FIGS. First, the liquid crystal display device implemented as the wiring board built-in device of the first embodiment will be described with reference to FIGS. 1 and 2.

  FIG. 1 is an exploded perspective view of the liquid crystal display device of the first embodiment. FIG. 2 is a cross-sectional view taken along the line AA of the assembled liquid crystal display device of the first embodiment.

  A liquid crystal display device (wiring board built-in device) 1A according to the first embodiment includes a backlight 2A, two liquid crystal display panels (only a small liquid crystal display panel 3 is displayed in FIG. 1), as shown in FIG. A flexible wiring board 4A and a cover 6A are provided.

  The backlight 2A includes a housing 2Aa and an optical film, a light guide plate, and LEDs (not shown). The housing 2Aa is formed in a box shape having a partition plate 2b inside. Below the partition plate 2b, an optical film and a light guide plate are stacked, and one or more LEDs are disposed on the side of the light guide plate. A large liquid crystal display panel (not shown) is disposed on the lower surface of the light guide plate (see FIG. 5).

  Here, in 1st Embodiment, it has the long groove part 2c up and down in the center part in the side surface 2f of housing | casing 2Aa, and it is partially recessed inside 2 housing | casing 2Aa on both sides of the groove part 2c. There are two engaging portions 2d. The groove 2c has a width that is about the same as or larger than the width of the tongue piece 5 of the flexible wiring board 4A described later, and a depth that is about the same as or larger than the thickness of the tongue piece 5. is doing. Moreover, in order to supply the light irradiated from LED to the upper side through a light guide plate and an optical film, the rectangular-shaped opening frame 2e which has the wall part which stands up in the lamination direction is provided inside the partition plate 2b. Is formed.

  The small liquid crystal display panel 3 is smaller in size than the large liquid crystal display panel stacked from the lower side of the backlight 2A, and is formed in a rectangular shape having a size smaller than the opening frame 2e of the partition plate 2b. And is used as the first circuit of the present invention. The small liquid crystal display panel 3 has connection terminals (not shown) for connection with the flexible wiring board 4A.

  The flexible wiring board 4A is a flexible wiring board called FPC, and is housed inside the casing 2Aa by being placed on the partition plate 2b of the casing 2Aa of the backlight 2A. ing. The flexible wiring board 4 </ b> A has an opening 4 a having a size larger than that of the small liquid crystal display panel 3 at a position where the small liquid crystal display panel 3 is disposed. The flexible wiring board 4A includes a first connection portion 4b protruding inward from the periphery of the opening 4a and a plurality of other wirings (not shown) for connecting circuits other than the small liquid crystal display panel 3. Connection part. The first connection portion 4b is connected to a connection terminal of the small liquid crystal display panel 3, and a plurality of other connection portions are connected to a drive IC 9 serving as a drive circuit and a control circuit (not shown). In the first embodiment, the driving IC 9 and the control circuit are used as the second circuit of the present invention.

  The flexible wiring board 4A has two tongue pieces (only one tongue piece is shown in FIG. 1) protruding from the periphery thereof, and the other tongue piece protrudes from a position opposite to the one tongue piece. 2 is provided at a position corresponding to the position where the groove 2c is formed, and a rectangular land 5Aa is provided on the surface of the tongue piece 5 and on the surface facing the cover 6A. The land 5Aa is connected to a ground wire (not shown) formed on the flexible wiring board 4A, and the tongue 2 is bent at the base of the tongue 5 to be bent, whereby the housing 2Aa of the backlight 2A is formed. When the cover 6A is covered with the cover 6A, the cover 2A is disposed between the side surface 2f of the housing 2Aa and the side surface 6b of the cover 6A. The bent tongue piece 5 is fitted in the groove 2c of the housing 2Aa.

  The cover 6A has a display opening 6a on its upper surface, and has hooks 7A and 7B on its side surface 6b. Further, the cover 6A has a size that covers the flexible wiring board 4A as a whole while partially covering the small liquid crystal display panel 3 by pressing a conductive thin plate such as a stainless thin plate. Thus, the backlight 2A is formed in a shape that covers the upper surface and the side surface 2f of the housing 2Aa. The display opening 6 a is an opening for exposing the display portion of the small liquid crystal display panel 3, and is formed in a rectangular shape at a position corresponding to the arrangement position of the small liquid crystal display panel 3.

  The hooks 7A and 7B of the cover 6A are folded inside the cover 6A by making the base of the strip 6A, which is partially cut into a U-shape, into a mountain fold, and folding the vicinity of the center of the strip into a valley. It is formed by bending. A total of three hooks 7A and 7B are formed on each of the two side surfaces 6b of the cover 6A. Of the three hooks 7A and 7B, the central hook 7A is formed at a position corresponding to the position where the groove 2c of the housing 2Aa is formed, and is used as a protrusion of the present invention that contacts the land 5Aa. The other two hooks 7B are formed at positions corresponding to the positions where the engaging portions 2d of the housing 2Aa are formed. When the cover 6A is put on the housing 2Aa of the backlight 2A, the two hooks 7B are formed. Is engaged with the engaging portion 2d of the housing 2Aa, so that the cover 6A is fixed to the housing 2Aa. By forming the three hooks 7A and 7B, one confirmation window 8 is formed around each of the hooks 7A and 7B.

  Next, the operation of the liquid crystal display device (device with a built-in wiring board) 1A of the first embodiment will be described with reference to FIGS.

  The cover 6A in the liquid crystal display device 1A of the first embodiment covers the small liquid crystal display panel 3 and the flexible wiring board 4A by press-molding a thin stainless steel plate that is easily thinned without losing strength. ing. By connecting the ground wire of the flexible wiring board 4A to the stainless steel cover 6A, the cover 6A can discharge static electricity and external noise via the ground wire. By covering 2Aa with this cover 6A, the liquid crystal display device 1A can be provided with an ESD countermeasure function and a noise countermeasure function.

  Here, as shown in FIGS. 1 and 2, in the liquid crystal display device 1A of the first embodiment, the surface of the tongue piece 5 formed on the periphery of the flexible wiring board 4A is connected to the ground line. A land 5Aa is formed, and a hook 7A that contacts the land 5Aa is formed at a position of the cover 6A facing the land 5Aa. Therefore, the ground line of the flexible wiring board 4A and the conductive cover 6A can be directly connected without disposing a separate member such as the connector 116 shown in the conventional example (see FIGS. 5 and 6). Can be connected.

  Since the hook 7A is in contact with the tongue piece 5 via the land 5Aa, when the cover 6A is disposed on the housing 2Aa, a contact force (external addition) is applied to the tongue piece 5 so that the tongue piece 5 Even if it bends, the contact force is difficult to propagate to portions other than the tongue piece 5 of the flexible wiring board 4A because the base of the tongue piece 5 is bent. Therefore, a portion other than the tongue piece 5 of the flexible wiring board 4A is difficult to bend. From this, it is possible to prevent the flexible wiring board 4A and the partition plate 2b from being bent in the stacking direction and adversely affecting the optical film attached to the flexible wiring board 4A and the partition plate 2b. Specifically, when the driving IC 9 is connected to the flexible wiring board 4A as in the first embodiment, the driving IC 9 can be prevented from being peeled off, and an optical film is formed below the partition plate 2b. When is attached, it is possible to prevent light unevenness due to the deflection of the optical film from occurring in the large and small liquid crystal display panels 3.

  Further, as shown in FIG. 2, in the first embodiment, the protrusion of the present invention is used as a hook 7A so that an appropriate elastic force is applied to the hook 7A. If the hook 7A does not contact the land 5Aa, the ground wire and the cover 6A cannot be conducted. On the other hand, if the hook 7A contacts the land 5Aa with an excessive contact force, the flexible wiring board 4A can be connected. The housing 2Aa in contact with the flexible wiring board 4A and the optical film in the housing 2Aa are bent, and the driving IC 9 is peeled off or light unevenness is caused. In other words, the hook 7A to which an appropriate elastic force is applied not only ensures the conduction between the hook 7A and the land 5Aa, but also an unnecessarily large contact force causes the flexible wiring board 4A and the housing. It can prevent giving to body 2Aa and an optical film.

  Further, as shown in FIG. 2, the hook 7A is formed on the side of the cover 6A, so that the liquid crystal display device is more than the conventional liquid crystal display device (see FIG. 6) 101 by eliminating the connector 116. The thickness of 1A can be reduced. Since a total of three hooks 7A and 7B are formed on one side surface 6b, the hook 7A at the center is used as a protrusion of the present invention, and is also used as an engaging member between the housing 2Aa and the cover 6A. be able to.

  At that time, since the whole tongue piece 5 is formed so as to be housed in the groove 2c of the housing 2Aa when the base of the tongue piece 5 is bent, the side surface 2f of the housing 2Aa and the side surface 6b of the cover 6A Even if the tongue piece 5 is interposed between the cover pieces 6A, the cover 6A does not travel outward (projects and deforms) by the thickness of the tongue piece 5. Therefore, it can be prevented that the cover 6A protrudes and the cover 6A is detached from the housing 2Aa.

  Since the confirmation window 8 is formed around the three hooks 7A and 7B, the contact between the protrusion and the land 5Aa can be visually confirmed. This prevents the hook 7A and the land 5Aa from coming into contact with each other and prevents the occurrence of problems such as insufficient ESD countermeasures and noise countermeasures, thereby improving the yield of the liquid crystal display device 1A.

  That is, the liquid crystal display device (wiring board built-in device) 1A according to the first embodiment reliably connects the flexible wiring board 4A and the conductive cover 6A without attaching the connector 116 shown in the conventional example. Therefore, the manufacturing cost of the liquid crystal display device 1A can be reduced by the manufacturing cost and the installation cost of the conductive connector 116.

  Next, the liquid crystal display device (device with a built-in wiring board) according to the second embodiment will be described with reference to FIGS.

  FIG. 3 is an exploded perspective view of the liquid crystal display device of the second embodiment. FIG. 4 is a cross-sectional view taken along the line BB of the assembled liquid crystal display device of the second embodiment.

  The liquid crystal display device 1B of the second embodiment includes a backlight 2B, a liquid crystal display panel 3, a flexible wiring board 4B, and a cover 6B as shown in FIGS.

  The backlight 2B is formed in the same manner as the backlight 2A of the first embodiment, except that the groove 2c is not formed at the center of the side surface 2f. The large liquid crystal display panel stacked below the backlight 2B and the small liquid crystal display panel 3 stacked above the backlight 2B are formed in the same manner as the respective liquid crystal display panels of the first embodiment. Has been.

  In the flexible wiring board 4B of the second embodiment, unlike the flexible wiring board 4B of the first embodiment, the tongue piece 5 is not formed on the periphery thereof. On the other hand, in the flexible wiring board 4B of the second embodiment, two lands 5Ba are formed on the surface that is normal to the stacking direction and that faces the cover 6B. Except for these, the flexible wiring board 4B of the second embodiment is formed in the same manner as the flexible wiring board 4B of the first embodiment.

  The cover 6B is formed in a shape that covers the side surface 2f of the housing 2Ba, as in the first embodiment. Two hooks 7B are formed on each side surface 6b of the cover 6B. Unlike the first embodiment, the hook 7A is not formed at the center of each side surface 6b. On the other hand, the cover 6B of the second embodiment has a hook 7C having the same form as the hooks 7A and 7B of the first embodiment at a position facing the land 5Ba. The hook 7C provided at a position facing the land 5Ba is used as a protrusion of the present invention. Other portions of the cover 6B of the second embodiment are formed in the same manner as the cover 6A of the first embodiment.

  Next, the operation of the liquid crystal display device (wiring board built-in device) 1B of the second embodiment will be described with reference to FIGS.

  As shown in FIGS. 3 and 4, the cover 6B in the liquid crystal display device 1B according to the second embodiment is located at a position facing the land 5Ba of the flexible wiring board 4B when the cover 6B is put on the housing 2Ba. A hook 7C of the provided cover 6B is formed so as to contact the land 5Ba. Therefore, the stainless steel cover 6B can be electrically connected to the ground line of the flexible wiring board 4B without separately arranging the connectors (see FIGS. 5 and 6) 116 shown in the conventional example.

  In addition, since the hook 7C serving as the protrusion of the present invention has an appropriate elastic force, the flexible wiring board 4B housed in the housing 2Ba and the partition plate 2b of the housing 2Ba that contacts the flexible wiring board 4B are more than necessary. Can be prevented from being applied. Thereby, it can prevent having a bad influence on flexible wiring board 4B and an optical film.

  By forming the hook 7C, the contact between the hook 7C and the land 5Ba can be visually confirmed, so that it is prevented that the cover 6B is not electrically connected to the ground line, and the yield of the liquid crystal display device 1B is reduced. Can be improved.

  That is, the liquid crystal display device (wiring board built-in device) 1B of the second embodiment can reliably connect the flexible wiring board 4B and the conductive cover 6B without attaching the connector 116. The manufacturing cost of the liquid crystal display device 1B can be reduced by the manufacturing cost and the installation cost of the connector 116 shown in the example.

  In addition, this invention is not limited to embodiment mentioned above etc., A various change is possible as needed.

  For example, in the two embodiments described above, the liquid crystal display devices 1A and 1B are used as the wiring board built-in devices, but other electronic devices such as an organic EL display device are used as the wiring board built-in devices of the present invention. It may be.

  Further, the hook 7C to be brought into contact with the land 5Ba is formed by bending a strip obtained by cutting the inside of the cover 6B into a U-shape inside the cover 6B. However, in another embodiment, the hook 7C A strip obtained by projecting from the peripheral edge may be formed by bending inside the cover 6B. In that case, it is preferable to provide the confirmation window 8 around the hook.

The disassembled perspective view which shows the liquid crystal display device of 1st Embodiment about the wiring board built-in apparatus of this invention. 1 is a cross-sectional view taken along line AA of FIG. 1 according to the assembled liquid crystal display device of the first embodiment. The disassembled perspective view which shows the liquid crystal display device of 2nd Embodiment. 3 is a cross-sectional view of the assembled liquid crystal display device according to the second embodiment taken along line BB in FIG. An exploded perspective view showing an example of a conventional liquid crystal display device CC sectional view of FIG. 5 according to the assembled conventional liquid crystal display device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1A, 1B Liquid crystal display device 2A, 2B Backlight 2Aa Case 2b Partition plate 2c Groove part 2d Engagement part 2e Opening frame 2f Side surface 3 Small liquid crystal display panel 4A Flexible wiring board 4a Opening part 4b 1st connection part 5 Tongue piece 5a Land 6A Cover 6a Display opening 6b Side surface 7A, 7B, 7C Hook 8 Confirmation window 9 Drive IC

Claims (5)

A housing for housing the first circuit;
A flexible wiring board housed in the housing and connecting the first circuit and a second circuit other than the first circuit;
A conductive cover partially or wholly covering the first circuit and the flexible wiring board housed in the housing;
The flexible wiring board has a land connected to a ground line formed on the flexible wiring board on a surface facing the cover,
The said board has a projection part which contacts the said land when the said 1st circuit and the said flexible wiring board are covered, The wiring board built-in apparatus characterized by the above-mentioned. The cover is formed in a shape that covers a side surface of the housing formed in a box shape,
The land is formed on the surface of the tongue piece protruding from the periphery of the flexible wiring board, and is interposed between the side surface of the housing and the side surface of the cover by bending the tongue piece, The wiring board built-in device according to claim 1, wherein the device is disposed so as to contact a side surface of the cover. The protrusion is formed in a hook shape formed by partially cutting the inside of the cover or by protruding a part of the cover formed by protruding from the peripheral edge of the cover to the inside of the cover. The device with a built-in wiring board according to claim 1 or 2, wherein the device has a built-in wiring board. The housing includes a groove portion having a width and a depth that can accommodate the tongue piece in a part of a side surface of the housing and in contact with the tongue piece by bending of the tongue piece. The wiring board built-in apparatus of Claim 2 or Claim 3 characterized by the above-mentioned. The said cover has a confirmation window which can confirm the contact of the said projection part and the said land in the circumference | surroundings of the said projection part. Wiring board built-in device according to item.

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