JP2011204696A - Waterproof structure of battery-mounting section in electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof structure of a battery-mounting section in an electronic apparatus which can surely waterproof and hardly requires dimensional accuracy and mounting position accuracy and can dispense with large stress applied to a circuit board.SOLUTION: In the waterproof structure of a battery-mounting section in the electronic apparatus, a first circular rib 41 is formed in the vicinity of a hole 40 for projecting a pointed head of a power supply terminal on a waterproof packing 4 covered on the power supply terminal of the circuit board. Furthermore, grooves 45, 46 are formed at an inner peripheral side of the first circular rib 41 outside the hole 40 on the waterproof packing 4. Generation of a gap between the hole 40 and the power supply terminal caused by falling of the first circular rib 41 can be prevented under existence of these grooves 45, 46 at the time of mounting a battery pack on an apparatus case. Consequently, the waterproof packing 4 can surely waterproof even though dimensional accuracy and mounting position accuracy are rough somewhat, and large stress is not applied to the circuit board.

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 waterproof structure of the battery mounting portion of the present invention is:
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
Covering the power supply terminal with a waterproof packing having a hole projecting the tip of the power supply terminal, and a first annular rib in contact with the battery mounted on the battery mounting part around the hole,
In the waterproof packing, a groove is formed on the inner peripheral side of the first annular rib outside the hole portion.

  According to the present invention, the first annular rib collapses 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 supply terminal protrudes. It is possible to suppress the generation of a gap between the hole portion and the power supply terminal. Therefore, even if the dimensional accuracy or the mounting position accuracy is somewhat rough, it can be reliably waterproofed, and the circuit board is not subjected to too much stress.

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.

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.

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.

  A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.

(Appendix 1) A battery mounting part for mounting a power battery is provided on the outer surface side of the device case, and the battery terminal is attached to the terminal of the power terminal mounted on the circuit board housed in the device case. In an electronic device formed with an opening to be exposed on the part side,
A hole made of soft rubber and projecting the tip of the power terminal; a first annular rib that elastically contacts the battery mounted on the battery mounting portion around the hole; and the first A waterproof structure for a battery mounting portion, wherein the power supply terminal is covered with a waterproof packing having a second annular rib that elastically contacts the inner surface of the device case around the opening outside the annular rib.

  (Additional remark 2) The waterproof structure of the battery mounting part of Additional remark 1 characterized by the said outer peripheral part in which the said 2nd annular rib was formed reaching the surface of the said circuit board.

  (Additional remark 3) The waterproof structure of the battery mounting part of Additional remark 1 or 2 characterized by forming the groove | channel on the inner peripheral side of the said 1st annular rib in the said waterproof packing outside the said hole part.

  (Additional remark 4) The connection rib which continued between the inner peripheral sides of the said 1st annular rib was formed in the said waterproof packing between the said hole parts, The additional description 1 to 3 characterized by the above-mentioned. Waterproof structure of the battery mounting part.

  The invention described in Supplementary Note 1 includes, as shown in FIGS. 1 to 5, for example, a battery mounting portion 11 for mounting a power supply battery is provided on the outer surface side of the device case 10, and the device case 10 is provided in the device case. In an electronic device formed with an opening that exposes the tip of the power supply terminal 2 mounted on the circuit board 3 to be accommodated to the battery mounting portion, the tip of the power supply terminal is formed of soft rubber. A hole 40 for projecting a portion, a first annular rib 41 elastically contacting the battery mounted on the battery mounting portion around the hole, and the device around the opening outside the first annular rib The power supply terminal 2 is covered with a waterproof packing 4 having a second annular rib 42 that elastically contacts the inner surface of the case.

  According to the invention described in appendix 1, the waterproof packing is made of soft rubber, and the first annular rib around the hole portion from which the power terminal protrudes elastically contacts the battery mounted on the battery mounting portion. The second annular rib formed on the outside of the first annular rib elastically contacts the inner surface of the device case around the opening, so that it can be reliably waterproofed even if the dimensional accuracy and mounting position accuracy are somewhat rough, and the circuit board However, no great stress is applied.

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

  The invention described in Supplementary Note 3 is the waterproof structure of the battery mounting part described in Supplementary Note 1 or 2, wherein, for example, as shown in FIGS. The grooves 44 and 45 are formed on the inner peripheral side of the first annular rib 41.

According to the third aspect of the invention, the presence of the groove formed on the inner peripheral side of the first annular rib outside the hole portion from which the power supply terminal protrudes causes the first case when the battery pack is attached to the device case. 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, when the battery pack is hooked on the device case from the power supply terminal side and attached from an oblique state, the first annular rib elastically contacts the battery pack obliquely. 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 appendix 4 is the waterproof structure of the battery mounting portion according to any one of appendices 1 to 3, wherein, for example, as shown in FIG. 3 to FIG. A connecting rib 48 is formed between the inner peripheral sides of the first annular rib 41 between the first annular ribs 41.

According to the fourth aspect of the present invention, when the battery pack is attached to 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 supply terminals protrude. The fall of the 1 annular rib can be suppressed.
That is, when the battery pack is hooked on the device case from the power supply terminal side and attached from an oblique state, the first annular rib elastically contacts the battery pack obliquely. 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. .

  According to the invention described in the appendix, the waterproof packing is formed of a soft rubber, the first annular rib is elastically contacted with the battery, and the second annular rib is elastically contacted with the inner surface of the device case around the opening. Even if the accuracy and the mounting position accuracy are somewhat rough, it can be reliably waterproofed, and the circuit board is not subjected to too much stress.

DESCRIPTION OF SYMBOLS 1 Electronic device 10 Device case 11 Battery pack accommodating part 12 Opening part 13 Locking recessed part 14 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 portion 45, 46 Groove portion 47 Inclined surface 48 Connecting rib 101 Battery pack 102 Battery terminal 103, 104 Locking claw 105 Locking portion

Claims (4)

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
Covering the power supply terminal with a waterproof packing having a hole projecting the tip of the power supply terminal, and a first annular rib in contact with the battery mounted on the battery mounting part around the hole,
A waterproof structure for a battery mounting portion, wherein a groove is formed in the waterproof packing on the inner peripheral side of the first annular rib outside the hole.   2. The waterproof structure for a battery mounting portion according to claim 1, wherein the waterproof packing has a second annular rib that contacts the inner surface of the device case around the opening outside the first annular rib.   The waterproof structure of the battery mounting portion according to claim 2, wherein the waterproof packing has a height of the second annular rib lower than that of the first annular rib.   4. The waterproof packing according to claim 1, wherein the plurality of hole portions are formed side by side, and the first annular rib extends in a direction in which the plurality of hole portions are arranged. The waterproof structure of the battery mounting part according to any one of the above.

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