JP4860196B2 - Waterproof structure of battery mounting part in electronic equipment - Google Patents

Description

  The present invention relates to a waterproof structure of a battery mounting portion in an electronic device using a battery as a power source.

An electronic device using a battery as a power source is provided so that the tip of a power supply terminal attached to the circuit board protrudes from a battery attachment part to which the battery is attached, and when the battery is attached to the battery attachment part, It is in contact with the battery terminal of the battery and becomes conductive.
And in waterproof electronic devices, cover the power terminal with a sheet-like waterproof packing to prevent water from entering the contact between the power terminal and the battery terminal and from the battery mounting part to the device case. Some of them are (for example, see Patent Documents 1 and 2).

  Specifically, in Patent Document 1, if the reference numerals of the drawings in the publication are also written, the circuit board (substrate 12) is mounted on the terminal block 13 on which the power supply terminals (power supply terminals 15) are arranged. A thin waterproof packing (terminal packing 17) is disposed, and the peripheral wall portion 23 around the terminal insertion hole 22 of the terminal packing 17 is connected to the battery pack in order to prevent water from entering the contact portion between the power terminal and the battery terminal. In order to prevent water from entering the device case from the battery mounting portion, the peripheral portion of the terminal packing 17 having annular sealing protrusions 24 and 25 formed on both the upper and lower surfaces of the peripheral portion is used for the battery. It is configured by compressing between the lower case 2 serving as a partition wall with the mounting portion and the terminal block 13.

Further, in Patent Document 2, if the reference numerals of the drawings in the publication are also written, a thickness is formed on a base 108 attached as an integral part to a power supply terminal (probe 107) attached to a circuit board (printed board 105). A meat sheet packing 109 is placed, and in order to prevent water from entering the contact portion between the probe 107 and the battery terminal 10, an annular rib 109a formed on the periphery of the upper surface of the sheet packing 109 is provided with a battery pack (battery). In order to prevent water from entering the device case from the battery mounting portion, an annular rib 109c formed on the side surface of the sheet-like packing 109 is formed on the device case (chassis 101). The structure is made by press-contacting the inner wall of the hole.
JP 11-297288 A JP 2000-102179 A

  However, as described above, the configuration described in Patent Document 1 compresses the peripheral portion of the terminal packing 17 between the lower case 2 and the terminal block 13 to prevent water from entering the device case from the battery mounting portion. Although it is a structure to prevent, since the thickness of the terminal packing 17 is thin, the reaction force is increased even if the annular sealing protrusions 24 and 25 are formed on both the upper and lower surfaces, and the terminal block 13 is mounted. There is a disadvantage that a large stress is applied to the printed circuit board.

  In addition, as described above, the configuration described in Patent Document 2 is configured so that the annular rib 109c formed on the side surface of the sheet-like packing 109 is pressed against the inner wall of the hole formed in the chassis 101 so that the battery mounting portion Since it is configured to prevent water from entering the device case, the dimensional accuracy of the holes and waterproof packing formed in the chassis 101 and the positional accuracy when attaching the probe 107 to the circuit board or attaching the circuit board to the chassis 101 are increased. There is an inconvenience that it must be done with accuracy.

  The problem of the present invention is that the waterproof structure of the battery mounting portion in the electronic device can be reliably waterproofed, the dimensional accuracy and the mounting position accuracy are not so required, and the circuit board is subjected to too much stress. It is to prevent it.

In order to solve the above problems, the invention described in claim 1 is provided with a battery mounting portion 11 for mounting a power battery on the outer surface side of the device case 10 as shown in FIGS. the device case 10, in an electronic device obtained by forming an opening to expose the distal portion of the installed power terminal 2 to the circuit board 3 housed in the device case to the battery mounting portion, prior Symbol supply terminal holes 40 for protruding the tip, the said opening surrounding the outside of the first annular rib 41, and the first annular rib against the battery mounted on the battery holder in the periphery of the hole portion the waterproof packing 4 reaching the surface of the circuit board and having a second annular rib 42 that contact with the device case inner surface, characterized in that over the said power supply terminal 2.

According to the invention described in claim 1, a first annular rib around the hole where the power supply terminals projecting is against the loaded battery the battery holder, it is formed outside the first annular rib since the second annular rib is contact with the device case the inner surface of the peripheral openings, even somewhat dimensional accuracy and mounting position precision rough can be reliably waterproof, also not applied too large stresses to the circuit board.

  The invention according to claim 2 is the waterproof structure of the battery mounting portion according to claim 1, and for example, as shown in FIGS. 3 and 4, the waterproof packing 4 includes the second annular rib 42. The formed outer peripheral portion reaches the surface of the circuit board 3.

  The invention according to claim 3 is the waterproof structure of the battery mounting portion according to claim 1 or 2, wherein, for example, as shown in FIGS. In this embodiment, grooves 44 and 45 are formed on the inner peripheral side of the first annular rib 41.

According to the invention described in claim 3, the first when the battery pack is attached to the device case due to the presence of the groove formed on the inner peripheral side of the first annular rib outside the hole portion from which the power terminal protrudes. It is possible to suppress the occurrence of a gap between the hole and the power terminal due to the fall of the annular rib.
That is, in the time of mounting an oblique state with respect to the device case by hooking the battery pack from the power supply terminal side, the first annular rib is gradually against the obliquely battery pack. At this time, there is a groove on the inner peripheral side of the first annular rib outside the hole portion from which the power supply terminal protrudes, and the first annular rib is disconnected from the hole portion, so that only the first annular rib is present. It is possible to suppress the occurrence of a gap between the hole and the power supply terminal due to falling down.

The invention according to claim 4 is the waterproof structure of the battery mounting portion according to any one of claims 1 to 3. For example, as shown in FIGS. 3 to 7, the waterproof packing 4 includes a plurality of waterproof packings 4 . The connecting ribs 48 are formed between the respective hole portions 40 and continuous between the inner peripheral sides of the first annular ribs 41.

According to the fourth aspect of the present invention, when the battery pack is mounted on the device case due to the presence of the connecting rib that continues between the inner peripheral sides of the first annular rib between the hole portions from which the power terminal protrudes. The fall of the first annular rib can be suppressed.
That is, in the time of mounting an oblique state with respect to the device case by hooking the battery pack from the power supply terminal side, the first annular rib is gradually against the obliquely battery pack. At this time, since there is a connecting rib continuous between the inner peripheral sides of the first annular rib between the hole portions from which the power supply terminals protrude, the falling of the first annular rib toward the inner peripheral side can be suppressed. .
The invention according to claim 5 is the waterproof structure of the battery mounting portion according to claim 4, wherein the waterproof packing is formed by arranging the plurality of holes, and the first annular rib is the plurality of the plurality of holes. These holes are extended in the direction in which they are arranged.
The invention according to claim 6 is the waterproof structure of the battery mounting portion according to any one of claims 1 to 5, wherein the second annular rib has a height higher than that of the first annular rib. It is characterized by being low.

According the present invention, the first annular rib is contact with the battery, the second annular rib is contact with the device case the inner surface of the peripheral openings, ensures the dimensional accuracy and mounting accuracy of position a little rough waterproof The circuit board is not stressed too much.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a mobile phone 1 as an embodiment of an electronic device to which the present invention is applied and a battery pack 101 in a detached state. The mobile phone 1 is connected to a battery pack storage portion (battery mounted) on the back side of a device case 10. Part) 11 is formed. A plurality of power supply terminals 2 (six in the illustrated example) are exposed side by side at an opening 12 formed at one end of the battery pack housing 11.

As shown in FIG. 2, the battery pack 101 has a plurality of (4 in the illustrated example) battery terminals 102 exposed side by side on one end side, and the larger battery terminal 102 on both sides is adjacent to two adjacent battery terminals 102 on both sides. The two power terminals 2 correspond to each other, and the two middle electronic terminals 102 correspond to the two intermediate battery terminals 2 respectively.
In the battery pack 101, the latching claws 103 and 104 on the battery terminal 102 side are hooked on the latching recess 13 and the edge 14 on the power supply terminal 2 side of the battery pack housing part 11, respectively. When the lock claw 15 provided on the side opposite to the power supply terminal 2 of the battery pack storage part 12 is rotated on the lock part 105 on the side opposite to the lock claws 103 and 104, the mounted state is achieved. Retained.

3 and 4 show the power supply terminal 2 side of the device case 10 to which the battery pack 101 is mounted. The power supply terminal 2 is constituted by power supply pins mounted on the circuit board 3 in the device case 10. In other words, the power supply pin 2 is also called a probe composed of a sleeve fixed to the circuit board 3 and a plunger urged in the protruding direction by a spring inside the power supply pin 2.
The power pin 2 is covered with a waterproof packing 4 formed of soft silicon rubber.

As shown in FIGS. 5 to 7, the waterproof packing 4 is formed with a plurality of (in the illustrated example, six) hole portions 40 penetrating in the vertical direction corresponding to the power pins 2. A first annular rib 41 is formed on the upper surface so as to surround the entire periphery of the hole portion 40. As shown in the figure, the first annular rib 41 has a planar shape in which two parallel portions 41a are continuous with arc portions 41b on both sides.
Further, a second annular rib 42 is formed outside the first annular rib 41 with a gap, and the second annular rib 42 is lower in height than the first annular rib 41. It has become.
Further, the waterproof packing 4 has an outer peripheral portion where the second annular rib 42 is formed reaching the surface of the circuit board 3.

As shown in FIGS. 3 and 4, the above waterproof packing 4 is placed on the circuit board 3 through the power pins 2 through the holes 40. Thereby, all of the power pins 2 are covered with the waterproof packing 4. Here, the plunger of the power pin 2 protrudes upward from the hole 40 and is positioned higher than the first annular rib 41.
The waterproof packing 4 has a state in which the first annular rib 41 protrudes upward from the opening 12 of the device case 10 and the second annular rib 42 elastically contacts the inner surface around the opening 12 as shown in the figure. Become.

  According to such a waterproof packing 4, since the packing material is made of soft silicone rubber, the dimensional accuracy of the opening 12 and the waterproof packing 4, and further, when the power supply pin 2 is attached to the circuit board 3 or the circuit board Even if the mounting position accuracy when mounting 3 in the device case 10 is somewhat rough, the second annular rib 42 can reliably prevent water from entering the device case 10 from the battery pack housing 11. Further, there is an advantage that the circuit board 3 is not subjected to too much stress.

And in the state which attached the battery pack 101 to the battery pack accommodating part 11 of the apparatus case 10, while the plunger of the power supply pin 2 will be in the connection state to the battery terminal 102 like illustration, the 1st annular rib 41 is the state. The battery pack 101 is in elastic contact with the inner surface.
Therefore, the connection portion between the power pin 2 and the battery terminal 102 can be individually waterproofed by the first annular rib 41.

By the way, in the present embodiment, the battery pack 101 is stored in the battery pack storage unit 11 as described above, with the locking claws 103 and 104 on the battery terminal 102 side being respectively connected to the power terminal 2 of the battery pack storage unit 11. The battery pack 101 is configured to be hooked on the side locking recess 13 and the end edge portion 14, and as shown in FIG. 8, the battery pack 101 has an end of the device case to which the locking claw 104 of the battery pack 101 is locked. It is housed in the battery pack housing part 11 so as to rotate with the edge part 14 as a fulcrum.
For this reason, when the battery pack 101 is mounted, as shown in FIG. 10, the parallel portion 41 a of the first annular rib 41 may be pushed down by the battery pack 101 toward the end edge 13 side where the locking claw 103 is hooked. is there. In this case, when the shape of the upper end surface of the waterproof packing 4 is a shape as shown in FIG. 9, as shown in FIG. And the clearance C between the parallel portion 41a opposite to the end edge portion 13 and the opening 12 is increased, and the compression allowance of the parallel portion 41a with respect to the battery pack 101, that is, The seal width is reduced (see reference numeral D in FIG. 11B).

Therefore, in the waterproof packing of this embodiment, as shown in FIGS. 3 to 7, grooves 45 and 46 are formed on the inner peripheral side of the first annular rib 41 outside the peripheral edge 44 of the hole 40. Yes. That is, the grooves 45 and 46 are formed in parallel between the peripheral portion 44a that surrounds the two on both sides of the hole 40, the peripheral portion 44b that individually surrounds the middle two, and the parallel portion 41a. ing.
Due to the presence of the parallel grooves 45 and 46, the first annular rib 41, that is, the parallel portion 41 a is disconnected from the peripheral portions 44 a and 44 b of the hole portion 40, so that the parallel portion 41 a is attached when the battery pack 101 is mounted. As a result, it is possible to suppress the occurrence of a gap between the hole 40 and the power supply pin 2 due to the collapse. Therefore, the waterproof performance with respect to the power supply pin 2 in the mounting state of the battery pack 101 can be maintained.

Further, an inclined surface 47 facing the peripheral edge portions 44a and 44b is formed in the groove 46 on the side opposite to the end edge portion 13.
Due to the presence of the inclined surface 47, the parallel part 41a is prevented from falling when the battery pack 101 is mounted.

And between the hole parts 40, the connection rib 48 which continues between the inner peripheral sides of the 1st annular rib 41 is formed. That is, a connecting rib 48 is formed between the peripheral portions 44a and 44b so as to continue between the parallel portions 41a.
Due to the presence of the connecting rib 48, the parallel portion 41a is prevented from falling when the battery pack 101 is mounted.
Therefore, the compression allowance of the parallel portion 41a with respect to the battery pack 101 in the mounted state, that is, the reduction in the seal width can be suppressed, and the waterproof performance of the connection portion between the power pin 2 and the battery terminal 102 can be maintained.

In the above embodiment, a mobile phone is used as the electronic device. However, the present invention is not limited to this, and a notebook personal computer, a digital camera, a PDA (Personal Digital Assistance), an electronic notebook, a portable type is used. It may be a wireless device or other electronic device.
Further, the shape of the waterproof packing, the soft material, and the like are arbitrary, and it is needless to say that other specific detailed structures can be appropriately changed.

1 is a perspective view of a mobile phone showing a configuration of an embodiment of an electronic device to which the present invention is applied, showing a state in which a battery pack is removed. It is the perspective view which looked at the battery pack of FIG. 1 from the back surface side. It is sectional drawing which shows the power supply terminal part side of the mobile telephone with which the battery pack was mounted | worn. FIG. 4 is a cross-sectional view taken along the power terminal portion of FIG. 3. It is a perspective view of the waterproof packing of embodiment. It is a top view of the waterproof packing of FIG. It is sectional drawing (a) along the arrow AA line of FIG. 6, and sectional drawing (b) along the arrow BB line similarly. It is sectional drawing which showed the power supply terminal part which covered the waterproof packing of the comparative example, and showed the state which does not mount a battery pack. It is the schematic plan view which showed the 1st annular rib part of the waterproof packing of FIG. It is sectional drawing which showed the deformation | transformation state of the waterproof packing at the time of mounting | wearing a battery pack. It is the schematic plan view (a) which shows the deformation | transformation state of the waterproof packing of a comparative example, and sectional drawing (b) along the arrow BB line.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electronic device 10 Device case 11 Battery pack accommodating part 12 Opening part 13 Locking recessed part 14 End edge part 15 Locking claw 2 Power supply terminal 3 Circuit board 4 Waterproof packing 40 Hole part 41 1st annular rib 42 2nd annular rib 44 hole peripheral edge 45/46 groove 47 inclined surface 48 connecting rib 101 battery pack 102 battery terminal 103/104 locking claw 105 locking portion

Claims (6)

A battery mounting part for mounting the power battery is provided on the outer surface side of the device case, and the tip of the power terminal mounted on the circuit board housed in the device case is exposed to the battery mounting part side. In an electronic device formed with an opening to be
Before Symbol hole for protruding the tip of the power supply terminal, a first annular rib, and the opening in the outer first annular rib against the battery mounted on the battery holder in the periphery of the hole portion waterproof structure of the battery mounting unit, wherein a waterproof packing that reaches the surface of the circuit board, covered on the power supply terminal and having a second annular rib against the device case the inner surface of the surrounding.   2. The waterproof structure for a battery mounting portion according to claim 1, wherein the waterproof packing has an outer peripheral portion on which the second annular rib is formed reaching a surface of the circuit board.   The waterproof structure of the battery mounting portion according to claim 1 or 2, wherein a groove is formed in the waterproof packing on an inner peripheral side of the first annular rib outside the hole portion. The said waterproof packing has the said some hole part , and formed the connection rib which continues between the inner peripheral sides of a said 1st annular rib between each hole part. The waterproof structure of the battery mounting part according to any one of the above. 5. The waterproof packing according to claim 4, wherein the plurality of holes are formed side by side, and the first annular rib extends in a direction in which the plurality of holes are arranged. Waterproof structure for battery mounting. The waterproof structure of the battery mounting portion according to any one of claims 1 to 5, wherein the waterproof packing has a height of the second annular rib lower than that of the first annular rib.

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