JP2008130847A - Card holder substrate attaching structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a card holder substrate attaching structure having satisfactory strength while reducing the number of the parts and simplifying the assembly process. <P>SOLUTION: One terminal of a holder mount substrate 6 is plunged into a slit 10 provided on one of inner circumference walls 9 of a depression 7 formed on a diaphragm 110 of a lower housing 5 and another terminal thereof is fastened on a bottom surface 8 of the depression 7 with an anchor-shaped latching projection 11 and a screw 4. By tightening together the holder mount substrate 6 with the lower housing 5 utilizing the screw 4 for fixing an upper housing 3 with the lower housing 5, the number of the parts will be reduced and the assembly process of the card holder attaching structure will be simplified. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an improvement of a card holder substrate mounting structure for mounting a holder mounting substrate having a card holder for mounting a card-shaped data storage medium inside a casing of a mobile terminal such as a mobile phone.

  A card holder substrate mounting structure for mounting a holder mounting substrate having a card holder for mounting a card-like data storage medium, for example, a SIM card or a memory card, inside the housing is a direct connection using a plurality of screws. A mounting structure of a mounting die is common.

  A general example of a conventional card holder substrate mounting structure when a holder mounting substrate is mounted inside the casing of a mobile phone will be described with reference to FIGS.

  4 is a perspective view showing an external appearance of a mobile phone as an example of an attachment target of a holder mounting board from the back side, and FIG. 5 is a perspective view showing an assembly process of a conventional card holder board mounting structure. 6 is a cross-sectional view of the conventional card holder substrate mounting structure taken along the line BB in FIG.

  As shown in FIGS. 4 and 5, the casing 101 of the mobile phone 100 includes an upper casing 102 to which a display and operation keys (not shown) are attached, and a lower casing fixed to the upper casing 102 with screws 121. 103 and a card-like data storage medium 105 such as a SIM card or a memory card mounted on the lower housing 103 and the battery 106 are detachably fitted to the lower housing 103 so that the battery 106 can be easily attached and detached. The battery cover 104 is used.

  The overall layout is as shown in the cross-sectional view of FIG. 6, and the main printed circuit board 107 on which electronic components required for controlling each part of the mobile phone 100 are mounted is an upper housing 102 and a lower housing 103. A holder mounting substrate 109 integrally provided with a card holder 108 for mounting the data storage medium 105 is fixedly mounted on the partition wall 110 of the lower housing 103 while being mounted so as to be sandwiched between them. It is supposed to be.

  Specifically, as shown in FIG. 5, a rectangular recess 111 for attaching the holder mounting substrate 109 to the partition wall 110 of the lower housing 103 is formed, and the holder mounting substrate is formed on the bottom surface 112 of the recess 111. With the 109 mounted, the holder mounting substrate 109 is fixed in the recess 111 by screwing the tips of the screws 113 penetrating the four corners of the holder mounting substrate 109 in the thickness direction into the tap holes 114 on the bottom surface 112 side. It has become so.

  The holder mounting board 109 and the main printed board 107 are electrically connected to the flexible printed cable 115 attached to the back surface of the holder mounting board 109, the stacking connector 116 fixed to the tip thereof, and the main printed board 107 side. This is done via a fixed stacking connector 117.

  In order to connect the stacking connector 116 and the stacking connector 117, as shown in FIG. 6, a rectangular hole 118 is formed in the bottom surface 112 corresponding to the arrangement position of the stacking connector 117 on the main printed circuit board 107 side. In addition, a groove portion 119 for accommodating the folded flexible printed cable 115 is formed on the bottom surface 112.

  When the holder mounting substrate 109 is attached to the lower housing 103, the stacking connector 116 on the holder mounting substrate 109 side is inserted from the hole 118 on the bottom surface 112 and fitted into the stacking connector 117 on the main printed circuit board 107, and FIG. As shown, the flexible printed cable 115 is folded into the groove 119 on the bottom surface 112, and as shown in FIG. 5, four screws 113 that penetrate the four corners of the holder mounting substrate 109 in the thickness direction are provided. The holder mounting substrate 109 is fixed to the recess 111 by being screwed into the tap hole 114 on the bottom surface 112 side.

  As described above, in the conventional card holder substrate mounting structure, when the holder mounting substrate 109 is mounted, four screws 113 different from the screws 113 used for fixing the upper housing 102 and the lower housing 103 are required. Thus, there are problems in terms of an increase in the number of parts and a complicated assembly process.

  Further, a card-like data storage medium 105 such as a SIM card or a memory card is mounted on a holder mounting substrate 109 via a card holder 108. The card holder 108 is connected to the data storage medium 105 as shown in FIG. Therefore, when the card holder 108 is mounted on the holder mounting substrate 109 having a flat surface, the data storage medium 105 has a size as shown in FIG. A gap is formed between the back surface and the surface of the holder mounting substrate 109. If the data storage medium 105 is accidentally pressed from above, the data storage medium 105 may be damaged or the data storage medium 105 may be inadvertent. There is a possibility that a problem such as falling down and coming off from the card holder 108 may occur.

  For this reason, the base member 120 for filling the gap between the back surface of the data storage medium 105 and the surface of the holder mounting substrate 109 to support the back surface of the data storage medium 105 is required. The pedestal member 120 may be formed of an independent member and adhered to the holder mounting substrate 109, or may be manufactured integrally with the holder mounting substrate 109. Therefore, there is a problem that the material cost of the synthetic resin material required for manufacturing the housing 101 increases, leading to an increase in product cost.

  The technique of fixing the circuit board to the frame body by fitting the circuit board to the frame body and pressing the edge of the circuit board with a reverse hook-shaped locking projection is already known in Patent Document 1, and A technique for fixing the printed circuit board so as not to move by screwing one of the four corners of the printed circuit board held in the guide groove is already known in Patent Document 2.

JP 2002-198667 A (paragraph 0023, FIG. 2B) JP 2004-235444 A (paragraph 0032, FIG. 4)

  An object of the present invention is to improve the disadvantages of the prior art, to reduce the number of parts and to simplify the assembly process, and to provide a card holder substrate mounting structure having sufficient strength.

The card holder substrate mounting structure of the present invention is a card holder substrate mounting structure for mounting a holder mounting substrate having a card holder for mounting a card-like data storage medium inside a housing, and to achieve the above object ,In particular,
A recess for attaching the holder mounting substrate is formed in the partition wall portion of the housing, and a slit is provided on one side of the inner peripheral wall of the recess to allow one end of the holder mounting substrate to enter, while the holder mounting substrate A reverse hook-shaped locking projection for locking the other end of the holder mounting substrate at a position on the bottom surface of the recess corresponding to the other end of the recess, and a tip of a screw penetrating the holder mounting substrate in the thickness direction And a screw hole for passing through.

Since one end of the holder mounting substrate is inserted into the slit on one side of the inner peripheral wall of the recess, the other end is fixed on the bottom surface of the recess by a reverse hook-shaped locking projection and screw. The mounting substrate can be securely fixed to the concave portion of the partition wall portion of the housing with one screw to ensure sufficient durability against the detachment of the data storage medium.
Further, by reducing the number of screws required for fixing the holder mounting substrate from four to one, the number of parts can be reduced and the assembly process can be simplified.

  Further, it is desirable that a partition wall portion defining one side of the slit is formed in parallel with the bottom surface of the recess, and the top surface of the partition wall portion is set to a height that substantially coincides with the mounting surface of the data storage medium in the card holder.

  Since the back surface of the data storage medium can be supported by the partition wall defining one side of the slit, it is not necessary to provide a special pedestal member on the holder mounting substrate, and is required for manufacturing the housing and the holder mounting substrate. It is possible to reduce the material cost of the synthetic resin material and reduce the cost of the product.

  In particular, in a structure in which a housing is formed by a lower housing having a partition wall and an upper housing screwed to the lower housing, the holder is mounted by a screw that penetrates the holder mounting substrate in the thickness direction. It is desirable that the substrate and the lower housing be fastened together with the upper housing.

  Since the holder mounting board is fastened to the lower casing with the screws that secure the lower and upper casings, there is no need to prepare special screws just for the mounting of the holder mounting board. Reduction and simplification of the assembly process will be ensured.

  Furthermore, a tongue piece projecting outward along the diagonal direction of the holder mounting substrate is provided, and the screw is attached to the holder mounting substrate and the lower housing at one of the four corners of the housing through holes formed in the tongue. It is desirable that the body be fastened together with the upper housing.

  The lower casing and the upper casing can be firmly fixed by fastening the lower casing and the upper casing together at one corner of the casing with screws used for attaching the holder mounting substrate.

The card holder substrate mounting structure according to the present invention has one end portion of the holder mounting substrate inserted into and fixed to the slit on one side of the concave inner peripheral wall formed in the housing partition wall portion, and the other end portion thereof in an inverted shape. The holder mounting board is securely fixed to the recess of the partition wall of the housing with one screw, so that it is sufficient for detachment of the data storage medium. Durability can be ensured.
Moreover, since the number of screws required for fixing the holder mounting substrate is reduced from four to one, the number of parts can be reduced and the assembly process can be simplified.

  Next, the best mode for carrying out the present invention will be specifically described by taking as an example a case where a holder mounting substrate is attached to the inside of a cellular phone casing.

  FIG. 1 is a perspective view showing an external appearance of a mobile phone according to an embodiment as an attachment target of a holder mounting board from the back side, and FIG. 2 is a perspective view showing a card holder board mounting structure of the embodiment including an assembly process. FIG. 3 is a cross-sectional view taken along the line AA in FIG. 1 for the card holder substrate mounting structure of the embodiment.

  As shown in FIGS. 1 and 2, the housing 2 of the mobile phone 1 includes an upper housing 3 to which a display and operation keys (not shown) are attached, and a lower portion whose four corners are fixed to the upper housing 3 with screws 4. The housing 5 and the card-like data storage medium 105 such as a SIM card or a memory card mounted on the lower housing 5 and the battery 106 are detachably fitted to the lower housing 5 so that the battery 106 can be easily attached and detached. The battery cover 104 is formed.

  The overall layout is as shown in the cross-sectional view of FIG. 3, and the main printed circuit board 107 on which electronic components necessary for controlling each part of the mobile phone 1 are mounted is formed between the upper casing 3 and the lower casing 5. The holder mounting substrate 6 integrally provided with the card holder 108 for mounting the data storage medium 105 is fixedly mounted on the partition wall 110 of the lower housing 5 while being mounted so as to be sandwiched between them. It is supposed to be.

  Specifically, as shown in FIG. 2, a rectangular recess 7 for attaching the holder mounting substrate 6 to the partition wall 110 of the lower housing 5 is formed, and one side of the inner peripheral wall 9 of the recess 7 is formed. A slit 10 is provided to allow one end of the holder mounting substrate 6, that is, the right end of the holder mounting substrate 6 in FIG.

  Further, the other end of the holder mounting substrate 6, i.e., the position on the bottom surface 8 of the recess 7 corresponding to the left end of the holder mounting substrate 6 in FIG. A hook-shaped locking projection 11 is formed integrally with the lower housing 5.

  As shown in FIG. 2, the lower housing 5 provided with the partition wall 110 is fixed integrally with the upper housing 3 by four screws 4 penetrating through the four corners. Screw holes 12 are formed in the four corners of the body 5, which are loose fitting holes for allowing the screws 4 to pass therethrough. The four screws 4 pass through the screw holes 12 at the four corners of the lower housing 5, and the tips of the four screws 4 are screwed into tap holes (not shown) located at the four corners of the upper housing 3. Fix to the housing 3.

  As shown in FIG. 2, the holder mounting substrate 6 is provided with a tongue piece 13 including a terminal projecting outward along the diagonal direction of the holder mounting substrate 6. 2, one screw 4 located at the lower left corner of the lower housing 5 in FIG. 2 passes through a hole 14 formed in the tongue piece 13 which is a part of the holder mounting substrate 6 in the thickness direction. The holder mounting substrate 6 and the lower housing 5 are fastened to the upper housing 3 together. That is, the screw hole 12 provided in the bottom surface 8 at the position of the lower left corner of the lower housing 5 in FIG. 2 functions as a screw hole for passing the screw 4 penetrating the holder mounting substrate 6 in the thickness direction. .

  Further, as shown in FIGS. 2 and 3, the portion 110 a of the partition wall 110 defining one side of the slit 10 is formed in parallel with the bottom surface 8 of the recess 7, and the upper surface of the partition wall portion 110 a is in contact with the recess 7. As shown in FIG. 3, the holder mounting board 8 is formed so as to have a height substantially matching the mounting surface 108 a of the data storage medium 105 in the state where the mounting of the holder mounting substrate 8 is completed.

  As in the prior art, the electrical connection between the holder mounting board 6 and the main printed board 107 is made by connecting the flexible printed cable 115 attached to the holder mounting board 6 and the stacking connector 116 and the main printed board 107 fixed at the tip thereof. This is done via a stacking connector 117 fixed on the side.

  In order to connect the stacking connector 116 and the stacking connector 117, as shown in FIG. 3, a rectangular hole 118 is formed in the bottom surface 8 corresponding to the arrangement position of the stacking connector 117 on the main printed circuit board 107 side. ing.

  However, in this embodiment, the flexible printed cable 115 is pulled out from one end portion of the holder mounting substrate 6 that enters the slit 10, that is, the right end portion of the holder mounting substrate 6 shown in FIG. And the flexible printed cable 115 gently bends in the vicinity of the right end of the holder mounted substrate 6, so that the folded flexible printed cable 115 can be accommodated. It is not necessary to form the groove portion on the bottom surface 8. This is because even if the holder mounting substrate 6 is strongly pressure-bonded onto the bottom surface 8, there is no possibility of disconnection at the folded portion of the flexible printed cable 115.

  When attaching the holder mounting substrate 109 to the lower housing 103, first, the stacking connector 116 on the holder mounting substrate 6 side is inserted into the hole 118 formed in the bottom surface 8 of the recess 7 to stack the stacking connector 117 of the main printed circuit board 107. To fit.

  In the previous stage, of the four screws 4 for fixing the lower housing 5 to the upper housing 3, three screws except the one screw 4 located at the lower left corner of the lower housing 5 in FIG. It is desirable to fix the lower housing 5 to the upper housing 3 using the screws 4.

  Next, one end of the holder mounting substrate 6 is inserted into the slit 10 located on one side of the inner peripheral wall 9 with the one end portion of the holder mounting substrate 6, that is, the right end portion of the holder mounting substrate 6 in FIG. The holder mounting substrate 6 is moved in the counterclockwise direction in FIG. 2 with the fitting portion as a fulcrum, and the other end portion of the holder mounting substrate 6, that is, the holder in FIG. The holder mounting substrate 6 is pushed to the position of the bottom surface 8 of the recess 7 by bringing the left end portion of the mounting substrate 6 into sliding contact with the tapered surface 11 a of the locking projection 11 and elastically deforming the base portion of the locking projection 11.

  When the back surface of the holder mounting substrate 6 comes into contact with the bottom surface 8, the other end of the holder mounting substrate 6, that is, the left end of the holder mounting substrate 6 in FIG. 2 gets over the tapered surface 11 a of the locking projection 11, By returning to elasticity, the upper surface of the other end of the holder mounting substrate 6 is supported by the reverse hook of the locking projection 11 as shown in FIG.

  Finally, one screw 4 located at the lower left corner of the lower housing 5 in FIG. 2 is inserted into the hole 14 of the tongue piece 13 in the holder mounting substrate 6, and the hole 14 and the screw hole 12 of the lower housing 5 are inserted. The holder mounting substrate 6 and the lower housing 5 are fastened together with the upper housing 3 by screwing the tip portion into a tapped hole (not shown) located at the lower left corner of the upper housing 3.

  One end portion of the holder mounting substrate 6, that is, the upper and lower surfaces of the right end portion of the holder mounting substrate 6 in FIG. 2 is sandwiched between the partition wall portion 110 a that defines one side of the slit 10 and the bottom surface 8. 2, that is, the upper and lower surfaces of the left end portion of the holder mounting substrate 6 in FIG. 2 are sandwiched between the reverse hook of the locking projection 11 and the bottom surface 8, and are tongue pieces that are part of the holder mounting substrate 6. 13 is fastened together with the lower housing 5 together with the upper housing 3 by one screw 4, so that the vertical mounting of the holder mounting substrate 6 is prevented. In addition, the two left and right side surfaces of the holder mounting substrate 6 are restrained by two surfaces (two surfaces facing each other) of the inner peripheral wall 9 adjacent to the formation portion of the slit 10 to prevent rattling in the width direction of the holder mounting substrate 6. The screw 4 penetrating the tongue piece 13 of the holder mounting substrate 6 completely prevents backlash of the holder mounting substrate 6 in the longitudinal direction, so that the data storage medium 105 can be attached and detached, that is, with respect to the card holder 108 and the holder mounting substrate 6. 2 and 3, sufficient durability can be exhibited against the force acting in the left-right direction.

  That is, the holder mounting substrate 6 is securely fixed to the concave portion 7 of the lower housing 5 with the single screw 4 located at the lower left corner of the lower housing 5, and sufficient durability against the data storage medium 105 is secured. can do.

  Since the screw 4 for fixing the holder mounting substrate 6 also serves as a screw for fixing the lower housing 5 to the upper housing 3, it is not necessary to prepare a special screw only for mounting the holder mounting substrate 6. Further, by fastening the four screws 4 for fixing the lower casing 5 to the upper casing 3, the holder mounting substrate 6 is fixed to the lower casing 5 at the same time, so the number of parts (number of screws) ) And simplification of the assembly process.

  In addition, by providing the holder mounting substrate 6 with the tongue pieces 13 protruding outward along the diagonal direction, the screws 4 for fixing the four corners of the lower housing 5 to the upper housing 3 are used as they are. Since the holder mounting substrate 6 is fixed, there is no need to change the design such as offsetting the screw arrangement position for fixing the lower housing 5 to the upper housing 3 inward, and the lower housing 5 and the upper housing A strong joint with the housing 3 is guaranteed.

Further, as shown in FIG. 3, in the state where the mounting of the holder mounting substrate 8 to the recess 7 is completed, the height of the mounting surface 108a of the data storage medium 105 in the card holder 108 is substantially the same as the height of the upper surface of the partition wall portion 110a. Therefore, the back surface of the data storage medium 105 can be supported by the partition wall portion 110a that defines one side of the slit 10, and it is not necessary to provide a special pedestal member on the holder mounting substrate 6, and the housing 2 and the holder mounting It is possible to reduce the overall material cost of the synthetic resin material required for manufacturing the substrate 6 and to reduce the cost of the product.
As can be seen by comparing FIG. 3 and FIG. 6, the partition wall portion 110a in the present embodiment shown in FIG. 3 is a bottom surface corresponding to a part of the bottom surface 112 in the conventional example of FIG. Since the portion 112 is slightly offset upward, the partition portion 110a is provided in order to define the slit 10 and further to support the back surface of the data storage medium 105. Resin material is not consumed, and the synthetic resin material required for manufacturing the lower housing 5 and the holder mounting substrate 6 which are a part of the housing 2 as a whole is shown in FIG. The volume of the material corresponding to the pedestal member 120 can be saved.

  In this embodiment, one end portion of the holder mounting substrate 6 in the longitudinal direction is fixed by the slit 10, while the other end portion is fixed by the locking projection 11, but the concave portion 7 extends in the width direction of the holder mounting substrate 6. A slit is provided at a position corresponding to one end, that is, one side of the inner peripheral wall 9 that is a boundary with the arrangement space of the battery 106, and a locking projection is formed at a position corresponding to the other end in the width direction of the holder mounting substrate 6. You may make it provide. However, in this case as well, the tongue 13 is positioned at the lower left corner or the lower right corner of the upper housing 3 in the same manner as in FIG. 2 because the lower housing 5 and the upper housing 3 are securely joined. The tongue piece 13 that is a part of the holder mounting substrate 6 is fixed by the screws 4 at the four corners used for joining the lower housing 5 and the upper housing 3. desirable.

  The operation of attaching / detaching the data storage medium 105 is the same as the conventional one, and the battery cover 104 is slid to the front side in the direction shown in FIG. 3 to be removed from the lower housing 5 and the holder mounting substrate 6 is exposed. The data storage medium 105 is attached to or detached from the card holder 108 by pushing and pulling the data storage medium 105 in the direction of the arrow in FIG.

  The case where the holder mounting substrate 6 is attached to the inside of the housing 2 of the mobile phone 1 has been described as an example, but the same configuration as described above is applied to various mobile terminals such as PHS and PDA. Is possible.

It is the perspective view which showed the external appearance of the mobile telephone used as an example of the attachment object of a holder mounting substrate from the back surface side. It is the perspective view shown including the process of an assembly about the card holder board | substrate mounting structure of one Embodiment to which this invention is applied. It is sectional drawing shown along the arrow AA of FIG. 1 about the card holder board | substrate mounting structure of the embodiment. It is the perspective view which showed the external appearance of the mobile telephone used as the attachment object of a holder mounting substrate from the back surface side (conventional example). It is the perspective view shown including the process of an assembly about the card holder board | substrate mounting structure (conventional example). It is sectional drawing shown along the arrow BB of FIG. 4 about the card holder board | substrate mounting structure (conventional example).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cellular phone 2 Housing | casing 3 Upper housing | casing 4 Screw 5 Lower housing 6 Holder mounting board 7 Recessed part 8 Bottom face 9 Inner peripheral wall 10 Slit 11 Locking protrusion 11a Tapered surface 12 Screw hole (free fitting hole)
13 Tongue piece (terminal)
14 hole 100 mobile phone 101 case 102 upper case 103 lower case 104 battery cover 105 card-like data storage medium 106 battery 107 main printed board 108 card holder 108a mounting surface 109 holder mounting board 110 partition part 110a partition part 111 concave part 112 bottom surface 113 screw 114 tapped hole 115 flexible printed cable 116 stacking connector 117 stacking connector 118 hole 119 groove 120 pedestal member 121 screw

Claims (4)

A card holder substrate mounting structure for mounting a holder mounting substrate having a card holder for mounting a card-shaped data storage medium inside the housing,
A recess for attaching the holder mounting substrate is formed in the partition wall portion of the housing, and a slit is provided on one side of the inner peripheral wall of the recess to allow one end of the holder mounting substrate to enter, while the holder mounting substrate A reverse hook-shaped locking projection for locking the other end of the holder mounting substrate at a position on the bottom surface of the recess corresponding to the other end of the recess, and a tip of a screw penetrating the holder mounting substrate in the thickness direction A card holder substrate mounting structure, characterized in that a screw hole is provided to pass therethrough.   A partition wall part defining one side of the slit is formed in parallel with the bottom surface of the recess, and the top surface of the partition wall has a height that substantially matches the mounting surface of the data storage medium in the card holder. The card holder substrate mounting structure according to claim 1, wherein:   The housing is configured by a lower housing having the partition wall and an upper housing screwed to the lower housing, and the holder mounting substrate and the holder are screwed by a screw penetrating the holder mounting substrate in the thickness direction. 3. The card holder substrate mounting structure according to claim 1, wherein a lower casing is fastened together with the upper casing.   The holder mounting board is provided with a tongue piece projecting outward along the diagonal direction of the holder mounting board, and the screw is provided at one of the four corners of the housing through a hole formed in the tongue piece. 4. The card holder substrate mounting structure according to claim 3, wherein the holder mounting substrate and the lower housing are fastened together with the upper housing.

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