JP2013026190A - Waterproof structure of electric connection part, portable electronic apparatus including waterproof structure, and waterproof method of electric connection part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof structure of an electric connection part which ensures contact between a first connection terminal and a second connection terminal and suppresses the deterioration of the waterproof performance.SOLUTION: A waterproof structure 15 of an electric connection part includes: a first connection terminal 5; a surface 2a of a first component; a second connection terminal 6; a protruding part 17; and a packing 18. In one embodiment, the first connection terminal 5 is provided at the first component 3. A continuous groove 16 enclosing the first connection terminal 5 is formed on the surface 2a of the first component 3. The second connection terminal 6 is provided at the second component 4 and connects with the first connection terminal 5. The protruding part 17 is continuously formed on a surface 4a of the second component 4 having the second connection terminal 6 so as to enclose the second connection terminal 6 and fit into the groove 16. The packing 18 is continuously provided at a tip of the protruding part 17 so as to press-fit into the groove 16.

Description

  The present invention relates to a waterproof structure for an electrical connection portion that electrically connects an electronic device main body and an electrical component such as a battery, a portable electronic device having the waterproof structure for the electrical connection portion, and a waterproof method for the electrical connection portion.

  In portable electronic devices such as mobile phones and digital cameras, an electrical component such as a battery is detachably attached to the electronic device body.

  In addition, the portable electronic device includes an electrical connection portion including connection terminals disposed on each of the electronic device body and the electrical component. Only by bringing the connection terminals into contact with each other, the electronic device main body and the electrical component can be conducted, and the user of the portable electronic device can easily replace the electrical component.

  In a portable electronic device provided with an electrical component that can be easily detached, the liquid flows from the gap between the electrical component and the electronic device body, and the liquid tends to adhere to the connection terminal of the electrical connection portion. If liquid adheres to the connection terminal, the mobile electronic device may leak and the mobile electronic device may break down. Thus, a portable electronic device having a waterproof structure in the vicinity of the electrical connection portion has been proposed (for example, Patent Document 1).

  FIG. 3 is a cross-sectional view of the portable electronic device disclosed in Patent Document 1. As shown in FIG. 3, the portable electronic device 1 disclosed in Patent Document 1 includes an electronic device main body 3 having a recessed portion 2, and an electrical component 4 detachably housed in the recessed portion 2. Yes. The electronic device main body 3 and the electric component 4 are each provided with a casing having a waterproof structure, and no liquid flows into the electronic device main body 3 or the electric component 4.

  A first connection terminal 5 electrically connected to a main electronic board provided in the electronic device main body 3 is disposed in the recess 2 of the electronic device main body 3. A second connection terminal 6 that is electrically connected to an electronic element in the electrical component 4 is disposed at a position corresponding to the first connection terminal 5 of the electrical component 4. The first and second connection terminals 5 and 6 are in contact with each other, and the electronic device main body 3 and the electrical component 4 are electrically connected.

  The portable electronic device 1 further includes a lid member 7 that is detachably engaged with the electronic device main body 3 and that at least partially covers the recessed portion 2. A groove 8 is formed in an annular shape so as to surround the opening of the recess 2 at the upper end of the side wall of the electronic device body 3 forming the recess 2. On the electronic device main body 3 side of the lid member 7, a ridge 9 that fits into the groove 8 is formed in an annular shape, and a packing 10 is formed at the tip of the ridge 9.

  The packing 10 is provided in an annular shape along the ridge 9 and is press-fitted into the groove 8. Accordingly, the gap between the electronic device main body 3 and the lid member 7 is closed, and the liquid does not flow into the recess 2. As a result, the liquid does not adhere to the first and second connection terminals 5 and 6, and the failure of the portable electronic device 1 is suppressed.

  However, in recent years, in order to reduce the weight of the portable electronic device 1, it is required to form the lid member 7 thinner. Therefore, the rigidity of the lid member 7 is further reduced, and the lid member 7 may be deformed by a user's force or an impact when the portable electronic device 1 is dropped. With the deformation of the lid member 7, the packing 10 is detached from the groove 8, and the waterproof performance of the portable electronic device 1 may be reduced.

  Moreover, since it is necessary for the annular packing 10 to surround the opening of the recess 2, the diameter of the annular packing 10 is relatively large. Therefore, when a force is applied to the electronic device main body 3 and the lid member 7 by the user and the electronic device main body 3 and the lid member 7 are deformed, the annular packing 10 is relatively largely deformed. For this reason, the packing 10 is easily detached from the groove 8, and there is a possibility that the waterproof performance is deteriorated.

  As the diameter of the annular packing 10 increases, the variation in the diameter of the packing 10 that occurs when the packing 10 is manufactured also increases. As a result, the packing 10 is difficult to be press-fitted into the groove 8 and the waterproof performance cannot be sufficiently ensured.

  Further, a groove 8 is formed at the upper end of the side wall of the electronic device body 3 forming the recess 2. Therefore, it is necessary to make the thickness of the side wall in the length direction D1 (referring to the direction intersecting the depth direction D2 of the recessed portion 2) larger than that of the electronic device main body in which the groove 8 is not formed. Therefore, the dimension of the length direction D1 of the portable electronic device 1 has increased.

  In patent document 2, in order to solve the above-mentioned subject of the portable electronic device 1 currently disclosed by patent document 1, the portable electronic device provided with the waterproof structure of the electrical connection part is disclosed. FIG. 4 is a cross-sectional view of the portable electronic device disclosed in Patent Document 2. Hereinafter, although the portable electronic device 11 currently disclosed by patent document 2 is demonstrated using FIG. 4, the same code | symbol is attached | subjected to the component same as FIG. 3, and the description is abbreviate | omitted.

  As shown in FIG. 4, the portable electronic device 11 includes an electronic device main body 3 including the recessed portion 2 and an electrical component 4 accommodated in the recessed portion 2. A first connection terminal 5 and a packing 12 formed in an annular shape so as to surround the first connection terminal 5 are disposed on the bottom surface 2 a of the recess 2.

  A second connection terminal 6 is disposed at a position corresponding to the first connection terminal 5 on the surface 4 a of the electrical component 4 facing the bottom surface 2 a of the recess 2. The packing 12 is in contact with a region surrounding the second connection terminal 6 in the surface 4 a of the electrical component 4.

  The electrical component 4 is fixed to the electronic device main body 3 in a state of being pressed toward the bottom surface of the recess 2. Therefore, the first and second connection terminals 5 and 6 are in contact with each other, and the packing 12 is compressed in the depth direction D2 of the recess 2 by the electric component 4. By the compressed packing 10, the gap between the bottom surface 2 a of the recess 2 and the electrical component 4 is more firmly closed, and the liquid does not reach the first and second connection terminals 5 and 6.

  In the portable electronic device 11 disclosed in Patent Document 2, the packing 12 is provided between the electronic device main body 3 and the electrical component 4 that are more rigid than the lid member 7. Therefore, even if a user's force or impact at the time of dropping is applied to the electronic device main body 3 or the electric component 4, the electronic device main body 3 or the electric component 4 is not easily deformed, and the waterproof performance by the packing 12 can be maintained.

  Moreover, since the diameter of the annular packing 12 should just have the magnitude | size which surrounds the 1st, 2nd connection terminals 5 and 6, compared with the packing 10 (FIG. 3) currently disclosed by patent document 1, the packing 12 of FIG. The size of the diameter can be reduced. Therefore, even if the electronic device main body 3 is deformed, the deformation amount of the packing 12 is smaller than that of the packing 10, and the deterioration of the waterproof performance due to the packing 12 is suppressed.

  Since the packing 12 is not press-fitted into the structure corresponding to the groove 8 in FIG. 3, when the packing 12 is manufactured, the waterproof performance of the packing 12 should be sufficiently ensured even if the packing 12 varies in diameter. Can do.

  Furthermore, since the packing 12 is provided on the bottom surface 2a of the recess 2 of the electronic device main body 3, the dimension in the length direction D1 of the portable electronic device 11 is made smaller than that of the portable electronic device 1 (FIG. 3). Is possible.

JP 2010-182603 A JP 2010-182602 A

  However, in the waterproof structure 13 of the electrical connection portion including the first and second connection terminals 5 and 6 and the packing 12 disclosed in Patent Document 2, the packing 12 includes the first and second connection terminals 5 and 5. 6 is compressed in the direction in which it is in contact (hereinafter referred to as contact direction D3). That is, the first and second connection terminals 5 and 6 receive a force in a direction away from each other due to the restoring force of the packing 12. For this reason, the force for bringing the first and second connection terminals 5 and 6 into contact with each other is canceled by the restoring force of the packing 12, and the first and second connection terminals 5 and 6 may cause poor contact.

  Further, when the first and second connection terminals 5 and 6 are separated by the restoring force of the packing 12 and the packing 12 is not compressed, the liquid easily reaches the first and second connection terminals 5 and 6. As a result, liquid may adhere to the first and second connection terminals 5 and 6, and the mobile electronic device 11 may leak.

  Accordingly, an example of an object of the present invention is to provide a waterproof structure for an electrical connection portion and a method for waterproofing an electrical connection portion, which can more reliably bring the first and second connection terminals into contact with each other and suppress a decrease in waterproof performance. The purpose is to provide.

  In order to achieve the above object, one aspect of the present invention provides an electrical device comprising a first connection terminal, a surface of a first component, a second connection terminal, a ridge, and a packing. It relates to the waterproof structure of the connection part. In this aspect, the first connection terminal is provided on the first component. A continuous groove surrounding the first connection terminal is formed on the surface of the first component. The second connection terminal is provided on the second component and is in contact with the first connection terminal. The ridge portion is formed continuously so as to be able to fit into the groove, surrounding the second connection terminal on the surface of the second component having the second connection terminal. The packing is provided continuously at the tip of the ridge so that it can be press-fitted into the groove.

  Further, according to one aspect of the present invention, a first connection terminal provided in the first component, a second connection terminal provided in the second component and in contact with the first connection terminal, The electrical connection part is provided with a waterproof method. In this aspect, a continuous groove surrounding the first connection terminal is formed on the surface of the first component having the first connection terminal, and the second connection terminal of the second component is provided. A continuous ridge portion surrounding the second connection terminal is formed on the surface having the protruding ridge portion that fits into the groove, and a continuous packing that is press-fitted into the groove is provided at the tip of the ridge portion. And a step of fitting a protrusion into the groove and press-fitting the packing into the groove.

  According to the waterproof structure for an electrical connection portion and the waterproof method for an electrical connection portion of the present invention, the first and second connection terminals can be brought into contact with each other more reliably, and a decrease in waterproof performance can be suppressed.

It is a disassembled perspective view of a portable electronic device provided with the waterproof structure of the electrical connection part which concerns on embodiment of this invention. It is sectional drawing of the portable electronic device shown in FIG. 1 is a cross-sectional view of a portable electronic device disclosed in Patent Document 1. FIG. 10 is a cross-sectional view of a portable electronic device disclosed in Patent Document 2. FIG.

  Hereinafter, a waterproof structure for an electrical connection portion according to the present invention and a portable electronic device using the waterproof structure for the electrical connection portion will be described in detail with reference to the drawings. Hereinafter, the waterproof structure of the electrical connection portion and the portable electronic device including the waterproof structure of the electrical connection portion according to the present embodiment will be described with reference to FIGS. The description is omitted.

  FIG. 1 is an exploded perspective view of a portable electronic device having a waterproof structure for an electrical connection portion according to the present embodiment.

  The waterproof structure of the electrical connection portion according to the present invention includes an electrical component (for example, a battery) detachably provided on the electronic device body, and the liquid adheres to the connection terminal that conducts between the electrical component and the electronic device body. This is suitable for portable electronic devices that need to be prevented. Examples of such portable electronic devices include mobile phones, digital cameras, portable televisions, game machines, tablet PCs, and notebook PCs.

  As shown in FIG. 1, the portable electronic device 14 is detachably engaged with an electronic device body 3 having a recess 2, an electrical component 4 detachably housed in the recess 2, and the electronic device body 3. And at least a part of the lid member 7 covering the recessed portion 2. The electronic device main body 3 and the electric component 4 are each provided with a casing having a waterproof structure, and no liquid flows into the electronic device main body 3 or the electric component 4.

  FIG. 2 is a cross-sectional view of the portable electronic device 14 shown in FIG. 1 cut along a plane (AA plane) parallel to the depth direction D2 of the recess 2. As shown in FIG. 2, a waterproof structure 15 for an electrical connection portion is provided between the electronic device main body 3 and the electrical component 4.

  The waterproof structure 15 of the electrical connection portion includes a first connection terminal 5 provided in the first component and a second connection terminal 6 provided in the second component. In the present embodiment, the first component corresponds to the casing of the electronic device main body 3, and the second component corresponds to the casing of the electric component 4.

  The first connection terminal 5 is electrically connected to a main electronic board (not shown) provided in the electronic device main body 3 and is disposed on the bottom surface 2 a of the recess 2. The second connection terminal 6 is electrically connected to an electronic element (not shown) in the electrical component 4 and is disposed on the surface 4 a of the electrical component 4 facing the bottom surface 2 a of the recess 2.

  The first component may constitute a part of the bottom surface 2a of the recess 2 in the casing of the electronic device main body 3. The second component may constitute a part of the surface 4 a of the casing of the electrical component 4.

  Further, the second connection terminal 6 is disposed at a position corresponding to the first connection terminal 5 on the surface 4 a of the electrical component 4. In a state where the electrical component 4 is mounted on the electronic device body 3, the first connection terminal 5 and the second connection terminal 6 are in contact with each other, and the electronic device body 3 and the electrical component are connected via the first and second connection terminals. 4 is conducting.

  Furthermore, the waterproof structure 15 of the electrical connection portion includes a groove 16 formed on the bottom surface 2a of the recess 2 and a ridge 17 formed on the surface 4a of the electrical component 4 so as to be fitted to the groove 16. Contains. The groove 16 and the ridge portion 17 are formed continuously so as to surround the first and second connection terminals 5 and 6. A packing 18 is provided at the end of the ridge 17 along the ridge 17.

  The packing 18 is press-fitted into the groove 16 in a compressed state in the length direction D1 that intersects the depth direction D2. That is, the gap between the bottom surface 2 a of the recess 2 and the surface 4 a of the electrical component 4 is firmly closed by the packing 18. Accordingly, the liquid does not reach the first and second connection terminals 5 and 6 from the outside of the waterproof structure 15 of the electrical connection portion, and the liquid is prevented from adhering to the first and second connection terminals 5 and 6. Is done.

  The packing 18 of the waterproof structure 15 of the electrical connection portion is compressed in the length direction D1. That is, the packing 18 is compressed in a direction different from the contact direction D3 of the first and second connection terminals 5 and 6. Therefore, the force for bringing the first and second connection terminals 5 and 6 into contact with each other is not canceled by the restoring force of the packing 12, and the contact failure between the first and second connection terminals 5 and 6 is suppressed.

  Further, even if the first and second connection terminals 5 and 6 are separated from each other, if the packing 12 is press-fitted into the groove 16, the waterproof performance by the packing 12 is maintained. Accordingly, it is possible to suppress a decrease in waterproof performance of the waterproof structure 15 of the electrical connection portion.

  Further, the packing 18 of the portable electronic device 14 is compressed in a length direction D1 different from the depth direction D2 of the recess 2. That is, the packing 18 does not apply a force in the depth direction D <b> 2 to the electric component 4 of the portable electronic device 14.

  For example, the electrical component 4 of the portable electronic device 11 shown in FIG. 4 receives a force in the depth direction D <b> 2 by the packing 12. Therefore, for example, there is a possibility that the electric component 4 may be detached from the electronic device main body 3 simply by applying a drop impact to the portable electronic device 11. In particular, when the electrical component 4 is a battery, when the battery is detached from the electronic device main body 3, the conduction of the first and second connection terminals 5 and 6 is cut off, and the operation of the portable electronic device 11 is stopped.

  In the portable electronic device 14 according to the present invention, since the packing 18 does not apply a force in the depth direction D2 to the electric component 4 of the portable electronic device 14, the electric component 4 is more electronic than the portable electronic device 11 shown in FIG. Hard to come off from the device body 3. Therefore, even if a drop impact is applied to the portable electronic device 14, it is possible to prevent the electrical component 4 from falling off the electronic device body 3.

  Further, in the portable electronic device 1 shown in FIG. 3, the packing 10 is formed on the protruding strip portion 9 provided on the lid member 7. The lid member 7 is often formed to be relatively thin, and the rigidity of the lid member 7 is relatively small. As a result, the lid member 7 may be deformed by a user's force or an impact when the portable electronic device 1 is dropped. With the deformation of the lid member 7, the packing 10 is detached from the groove 8, and the waterproof performance of the portable electronic device 1 may be reduced.

  In the portable electronic device 14 according to the present invention, the packing 18 is formed on the ridge portion 17 provided on the electrical component 4 that is easier to increase the rigidity than the lid member 7. Therefore, the deformation of the electrical component 4 due to the user's force or the impact when the portable electronic device 14 is dropped is smaller, and the packing 10 is hardly detached from the groove 8. Accordingly, it is possible to suppress a decrease in waterproof performance of the portable electronic device 14.

  Furthermore, the annular packing 18 of the portable electronic device 14 according to the present invention is formed in a size surrounding the second connection terminal. Therefore, the diameter of the packing 18 is smaller than the diameter of the annular packing 10 of the portable electronic device 1 shown in FIG. Therefore, even if a force is applied to the electronic device body 3 and the electrical component 4 by the user and the electronic device body 3 and the electrical component 4 are deformed, the deformation amount of the annular packing 18 is the deformation amount of the packing 10 (FIG. 3). Smaller than. As a result, the packing 18 is unlikely to come off from the groove 16, and a decrease in waterproof performance can be suppressed.

  Further, the variation in the diameter of the packing 18 that occurs when the packing 18 according to the present invention is manufactured can be small as the variation in the diameter of the packing 10 that occurs when the packing 10 shown in FIG. 3 is manufactured. This is because the diameter of the packing 18 is smaller than the diameter of the packing 10. Therefore, as compared with the case where the packing 10 is press-fitted into the groove 8, the packing 18 is easily press-fitted into the groove 16, and the waterproof performance of the portable electronic device 14 can be sufficiently secured.

  The groove 16 of the portable electronic device 14 according to the present invention is formed on the bottom surface of the recess 2. Therefore, the thickness of the side wall forming the recess 2 of the portable electronic device 14 (referring to the dimension in the length direction D1 of the side wall) is the thickness of the side wall forming the recess 2 of the mobile electronic device 1 shown in FIG. It can be made thinner than the thickness. As a result, the dimension of the portable electronic device 14 in the length direction D <b> 1 can be made smaller than that of the portable electronic device 1.

  Furthermore, as shown in FIG. 3, when the ridge 9 is formed on the lid member 7, depending on the material, a shape called sink is formed on the side of the lid member 7 opposite to the side on which the ridge 9 is formed. Defects may occur. Sink is likely to occur when the lid member 7 and the ridge 9 are integrally formed using a resin material. The appearance of the portable electronic device 1 may be deteriorated due to the occurrence of a shape defect in the lid member 7 constituting the appearance of the portable electronic device 1.

  The portable electronic device 14 according to this embodiment includes a lid member 7 that does not have a ridge portion, and the electrical component 4 on which the ridge portion 17 is formed is covered with the lid member 7. Therefore, even if a shape defect occurs in the electrical component 4 when forming the ridges 17 on the electrical component 4, the appearance of the portable electronic device 14 does not deteriorate. That is, according to the portable electronic device 14 according to the present embodiment, a waterproof function can be imparted to the portable electronic device 14 without deteriorating the appearance.

  In the present embodiment, the groove 16 is formed on the bottom surface 2a of the recess 2 and the protrusion 17 and the packing 18 are provided on the electrical component 4, but the protrusion 17 and the packing are provided on the bottom 2a of the recess 2. 18 may be provided, and the groove 16 may be formed in the electrical component 4.

DESCRIPTION OF SYMBOLS 2 Recessed part 3 Electronic device main body 4 Electrical component 5 1st connection terminal 6 2nd connection terminal 14 Portable electronic device 15 Waterproof structure of an electrical connection part 16 Groove | 17 Groove part 18 Packing

Claims (6)

A first connection terminal provided on the first component;
A surface of the first component having a continuous groove surrounding the first connection terminal;
A second connection terminal provided on a second component and in contact with the first connection terminal;
A series of protruding ridges formed on the surface of the second component having the second connection terminal so as to surround the second connection terminal, and fitted into the groove;
A waterproof structure for an electrical connection part, comprising: a continuous packing provided at a tip of the ridge part and press-fitted into the groove. The waterproof structure of the electrical connection part according to claim 1,
The first component is an electronic device main body having a recess, the electronic device main body having the first connection terminal on the bottom surface of the recess and electrically connected to the first connection terminal. Yes,
The second component is an electrical component housed in the recess, and includes the second connection terminal on a surface of the electrical component that faces the bottom surface of the recess, and the second connection terminal A portable electronic device that is an electrical component that is electrically connected. The waterproof structure of the electrical connection part according to claim 1,
The second component is an electronic device body having a recess, the electronic device body having the second connection terminal on a bottom surface of the recess and electrically connected to the second connection terminal. Yes,
The first component is an electrical component housed in the recess, and the first connection terminal is provided on a surface of the electrical component that faces the bottom surface of the recess. A portable electronic device that is an electrical component that is electrically connected.   The portable electronic device according to claim 2, further comprising a lid member that is detachably engaged with the electronic device main body and covers the recess.   The portable electronic device according to claim 2, wherein the electrical component includes a battery. A waterproof electrical connection unit comprising: a first connection terminal provided in a first component; and a second connection terminal provided in a second component and in contact with the first connection terminal. A method,
Forming a continuous groove surrounding the first connection terminal on a surface of the first component having the first connection terminal;
On the surface of the second component having the second connection terminal, a continuous ridge portion that surrounds the second connection terminal and that fits into the groove is formed. Providing a series of packings to be press-fitted at the tip of the ridge,
A method of waterproofing an electrical connection portion, comprising: fitting the protruding portion into the groove and press-fitting the packing into the groove.

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