JP6945845B2 - Waterproof member, lid member, and waterproof structure - Google Patents

Description

The present invention relates to a waterproof member, a lid member, and a waterproof structure applied to an electronic device.

Some electronic devices have an accommodating portion for accommodating parts such as memory cards and batteries, a connection terminal portion for electrically connecting cables and connectors, and a lid member for closing the opening of the accommodating portion. Are known. In order to enhance the waterproofness of such an electronic device, a lid member including a lid body and a waterproof member may be used. Patent Document 1 discloses a structure in which a waterproof packing receiver (waterproof member) to which a waterproof packing is attached is attached to a lid body with a screw.

Japanese Unexamined Patent Publication No. 2003-142841

As described above, when the waterproof member is attached to the lid body by inserting a tightening member such as a screw into a through hole formed in advance in the waterproof member, the waterproof member is attached rather than, for example, using an adhesive or the like. Positioning becomes easy. However, in this case, water that has entered between the lid body and the waterproof member may enter the electronic device through the through hole through which the tightening member is inserted in the waterproof member.

As described above, when the waterproof member attached to the lid body by the tightening member is used, the waterproof property of the electronic device may not be sufficiently obtained.

The waterproof member that solves the above problems is a waterproof member that is used as a constituent member of a lid member that closes an opening of a case in an electronic device and has a main body plate and a rubber-like elastic body provided on the main body plate. A tightening member having a shaft portion and a head connected to the shaft portion is provided to have a mounting portion to be attached to the lid main body, and the mounting portion is the shaft portion of the tightening member. An outer peripheral edge portion that has a through hole through which the rubber is inserted and a contact portion that is provided so as to surround the through hole and that the head of the tightening member comes into contact with, and is in close contact with the inner wall of the opening of the case. And the contact portion were made of the rubber-like elastic body.

According to this configuration, the adhesion between the inner wall of the opening of the case and the waterproof member in the electronic device can be obtained by the outer peripheral edge portion formed of the rubber-like elastic body. Further, the adhesion between the mounting portion of the waterproof member and the head of the tightening member can be obtained by the contact portion formed of the rubber-like elastic body. As a result, it is possible to suppress the intrusion of water into the case through the through hole through which the tightening member is inserted.

In the waterproof member, the mounting portion has a contact portion that contacts the lid body, and the contact portion is provided so as to surround the through hole, and further, the contact portion and the tightening member. The rubber-like elastic body may form an inner peripheral wall that comes into contact with the shaft portion and extends in the circumferential direction of the through hole.

According to this configuration, the adhesion between the mounting portion of the waterproof member and the lid body can be obtained by the contact portion formed of the rubber-like elastic body. Further, the adhesion between the through hole in the mounting portion of the waterproof member and the shaft portion of the tightening member can be obtained by the inner peripheral wall made of a rubber-like elastic body. As a result, it is possible to further suppress the intrusion of water into the case through the through hole through which the tightening member is inserted.

In the waterproof member, the contact portion preferably has a shape protruding toward the lid body.
According to this configuration, the tightening force of the tightening member is likely to be concentrated on the contact portion of the mounting portion. As a result, the contact portion is suitably pressed against the lid body, so that the adhesion between the contact portion and the lid body can be improved.

In the waterproof member, it is preferable that the main body plate has a flat plate portion and an annular protrusion projecting toward the lid main body, and the mounting portion is provided on the annular protrusion.
According to this configuration, it is possible to increase the strength of the mounting portion and its surroundings by the stepped portion connected to the annular protrusion portion and the flat plate portion.

The lid member that solves the above problems is a lid member that closes the opening of the case in the electronic device, and is a waterproof member having a lid main body, a main body plate, and a rubber-like elastic body provided on the main body plate. The waterproof member includes a tightening member for attaching the waterproof member to the lid body, the tightening member has a shaft portion and a head connected to the shaft portion, and the waterproof member is the lid main body. The mounting portion is provided so as to surround the through hole through which the shaft portion of the tightening member is inserted and the head portion of the tightening member. The rubber-like elastic body constitutes an outer peripheral edge portion of the waterproof member which has a contact portion and is in close contact with the inner wall of the opening of the case, and the contact portion of the waterproof member.

The waterproof structure that solves the above problems is a waterproof structure of an electronic device provided with the lid member, and has a structure in which an opening of a case in the electronic device is closed by the waterproof member.

According to the present invention, the waterproof property of the electronic device can be enhanced.

(A) is a schematic perspective view showing an electronic device in a state where the lid member is open, and (b) is a schematic perspective view showing an electronic device in a state where the lid member is closed. It is sectional drawing which shows the waterproof structure of 1st Embodiment. It is sectional drawing which shows the waterproof structure of 2nd Embodiment. It is sectional drawing which shows the waterproof structure of 2nd Embodiment. It is sectional drawing which shows the waterproof structure of 3rd Embodiment. It is the schematic which shows the waterproof structure of the modified example.

(First Embodiment)
Hereinafter, the first embodiment of the waterproof member, the lid member, and the waterproof structure will be described with reference to FIGS. 1 and 2. The vertical direction in the following description will be described as the vertical direction with reference to FIG.

As shown in FIGS. 1A and 1B, the electronic device 51 includes a case 52 and a lid member 53 that closes the opening 52a of the case 52. The waterproof member 11 is used as a constituent member of the lid member 53. The opening 52a of the case 52 communicates with the accommodating portion of the electronic device 51. The accommodating portion of the electronic device 51 accommodates, for example, detachable parts such as a memory card and a battery, a connection terminal portion for electrically connecting cables and connectors, and the like.

As shown in FIG. 2, the waterproof member 11 has a main body plate 21 and a rubber-like elastic body 22 provided on the main body plate 21. The rubber-like elastic body 22 covers a predetermined portion of the main body plate 21. The waterproof member 11 has a mounting portion 31 that is attached to the lid main body 54. The attachment portion 31 is attached to the lid main body 54 by providing a tightening member 55 having a shaft portion 55a and a head portion 55b connected to the shaft portion 55a.

The mounting portion 31 has a through hole 32 through which the shaft portion 55a of the tightening member 55 is inserted, and a contact portion 33 with which the head portion 55b of the tightening member 55 abuts. The number of through holes 32 (the number of tightening members 55) in the waterproof member 11 is preferably a plurality from the viewpoint of stabilizing the position of the waterproof member 11 attached to the lid main body 54. The number of through holes 32 (the number of tightening members 55) in the waterproof member 11 is preferably 4 or less from the viewpoint of simplifying the mounting process of the waterproof member 11.

In the waterproof member 11, the outer peripheral edge portion 41 that is in close contact with the inner wall of the opening 52a of the case 52 and the above-mentioned contact portion 33 are formed of a rubber-like elastic body 22. The outer peripheral edge portion 41 is provided over the entire circumference of the outer peripheral edge of the waterproof member 11. The contact portion 33 is provided so as to surround the through hole 32. The contact portion 33 of the present embodiment is formed in an annular shape so as to project toward the head portion 55b of the tightening member 55.

The waterproof member 11 further has a first connecting portion 42 that connects the contact portion 33 and the outer peripheral edge portion 41 on the lower surface side (opposite side of the lid main body 54) of the main body plate 21. The first connecting portion 42 is also composed of a rubber-like elastic body 22 like the contact portion 33 and the outer peripheral edge portion 41.

The main body plate 21 can be made of a material harder than the rubber-like elastic body 22. Examples of the material of the main body plate 21 include a hard synthetic resin and a metal. Examples of the hard synthetic resin include polypropylene, polyethylene terephthalate, polyamide, polyimide, ABS resin, and acrylic resin. Examples of the metal include stainless steel (SUS), iron, aluminum, copper, and nickel, and alloys containing these metals. From the viewpoint of weight reduction and shape stability, the main body plate 21 is preferably a metal plate having a thickness of 0.2 to 3 mm, and more preferably a stainless steel plate having a thickness of 0.2 to 3 mm.

As the rubber-like elastic body 22, synthetic rubber or thermoplastic elastomer can be used. Examples of the synthetic rubber include silicone rubber, urethane rubber, fluororubber, nitrile rubber, acrylic rubber, ethylene propylene rubber, and butyl rubber. Examples of the thermoplastic elastomer include a styrene-based thermoplastic elastomer and an olefin-based thermoplastic elastomer. The hardness of the rubber-like elastic body 22 is preferably in the range of A30 to A80, more preferably in the range of A30 to A80, from the viewpoint of enhancing the adhesion to the inner wall of the opening 52a of the case 52 and the head 55b of the tightening member 55. , A50 to A60. This hardness is measured by a Type A durometer compliant with JIS K6253. The compression set of the rubber-like elastic body 22 is preferably 20% or less under the condition that the rubber-like elastic body 22 is left in an atmosphere of 70 ° C. for 22 hours in a 25% compressed state.

The waterproof member 11 is obtained by integrating the rubber-like elastic body 22 into a predetermined portion of the main body plate 21. As a method of integrating the main body plate 21 and the rubber-like elastic body 22, a method such as two-color molding, insert molding, fixing by fitting, and fixing by adhesion can be used. In the main body plate 21, it is preferable to perform pretreatment on the portion where the rubber-like elastic body 22 is laminated from the viewpoint of enhancing the adhesiveness between the main body plate 21 and the rubber-like elastic body 22. Examples of the pretreatment of the main body plate 21 include application of an adhesive, application of a primer, and surface modification treatment.

The lid member 53 includes a lid main body 54, a waterproof member 11, and a tightening member 55. To assemble the lid member 53, the shaft portion 55a of the tightening member 55 is inserted into the through hole 32 of the waterproof member 11 and screwed into the lid main body 54. At this time, by tightening the tightening member 55, the head portion 55b of the tightening member 55 can be crimped to the contact portion 33. Screws and bolts can be used as the tightening member 55. The tightening member 55 is, for example, a push pin or a clip that can be tightened by pushing it into the through hole 32 and the mounting hole formed in the lid main body 54, and the waterproof member 11 and the lid main body 54. It is also possible to use a rivet or the like that can be tightened by crimping the tip portion. The tightening member 55 can be made of a metal material or a resin material, but is preferably made of a metal material because of its high rigidity and easy exertion of a tightening force.

The lid body 54 can be made of a hard resin or a metal material. The lid body 54 may be decorated by coloring or surface coating. One end of the lid body 54 is connected to the case 52 by a hinge mechanism (not shown). That is, the lid member 53 is provided on the case 52 so as to be rotatable between an open state and a closed state of the opening 52a of the case 52. The other end of the lid member 53 is configured to be lockable to the case 52 by a lock mechanism (not shown). The lid member 53 is held in a closed state by the lock mechanism at the opening 52a of the case 52. As the locking mechanism, for example, a locking mechanism for locking the locking convex portion to the locking concave portion can be used.

The electronic device 51 has a waterproof structure in which the opening 52a of the case 52 is closed by the waterproof member 11 of the lid member 53. More specifically, when the lid member 53 closes the opening 52a of the case 52, the outer peripheral edge 41 of the waterproof member 11 is in close contact with the inner wall of the opening 52a of the case 52. When the lid member 53 is open, parts can be attached to and detached from the case 52 through the opening 52a of the case 52, and the connection terminal portion can be used through the opening 52a of the case 52.

According to the first embodiment described in detail above, the following actions and effects are exhibited.
(1-1) The mounting portion 31 of the waterproof member 11 is provided so as to surround the through hole 32 through which the shaft portion 55a of the tightening member 55 is inserted and the through hole 32, and the head 55b of the tightening member 55. Has a contact portion 33 with which the head is in contact. In the waterproof member 11, the outer peripheral edge portion 41 that is in close contact with the inner wall of the opening 52a of the case 52 and the contact portion 33 are formed of a rubber-like elastic body 22.

According to this configuration, the adhesion between the inner wall of the opening 52a of the case 52 and the waterproof member 11 in the electronic device 51 can be obtained by the outer peripheral edge portion 41 made of the rubber-like elastic body 22. Further, the adhesion between the mounting portion 31 of the waterproof member 11 and the head 55b of the tightening member 55 can be obtained by the contact portion 33 formed of the rubber-like elastic body 22. As a result, it is possible to suppress the intrusion of water into the case 52 from the through hole 32 through which the tightening member 55 is inserted. Therefore, the waterproofness of the electronic device 51 can be improved.

In the waterproof member 11 of the present embodiment, the outer peripheral edge portion 41 is configured to be in close contact with the lid main body 54, but when the adhesiveness between the outer peripheral edge portion 41 and the lid main body 54 is reduced, the waterproof member 11 and the waterproof member 11 Water may enter between the lid body 54 and the lid body 54. Even in this case, the contact portion 33 can suppress the intrusion of water into the case 52 through the through hole 32 of the waterproof member 11.

(1-2) Since the tightening force of the head 55b of the tightening member 55 is applied to the contact portion 33 formed by the rubber-like elastic body 22, the waterproof member 11 utilizes the elastic force of the rubber-like elastic body 22. Can be attached to the lid body 54. As a result, it is possible to reduce the excessive load applied to the main body plate 21 and the lid main body 54 of the waterproof member 11. Therefore, in the lid member 53, it is possible to avoid excessive stress concentration, and it is possible to improve the durability of the lid member.

(1-3) The contact portion 33 of the present embodiment is formed in an annular shape so as to project toward the head portion 55b of the tightening member 55. In this case, when the tightening member 55 is tightened, the head portion 55b of the tightening member 55 easily compresses and deforms the contact portion 33. As a result, the adhesion between the head portion 55b of the tightening member 55 and the contact portion 33 can be further improved. Therefore, the waterproof property of the electronic device 51 can be further improved.

(Second Embodiment)
Next, the second embodiment of the waterproof member 11 will be described focusing on the differences from the first embodiment.
As shown in FIG. 3, the mounting portion 31 in the waterproof member 11 of the present embodiment has a contact portion 34 that contacts the lid main body 54. The contact portion 34 is provided so as to surround the through hole 32. The contact portion 34 is composed of a rubber-like elastic body 22. Further, the inner peripheral wall 32a that comes into contact with the shaft portion 55a of the tightening member 55 and extends in the circumferential direction of the through hole 32 is formed of a rubber-like elastic body 22.

The inner peripheral wall 32a of the waterproof member 11 of the present embodiment is continuously provided so as to be integrated with the contact portion 33. Therefore, by inserting the shaft portion 55a of the tightening member 55 into the through hole 32 and tightening the tightening member 55, it is possible to compress and deform the inner peripheral wall 32a of the through hole 32 and bring it into close contact with the shaft portion 55a. be.

The inner peripheral wall 32a of the through hole 32 having an inner diameter smaller than the diameter of the shaft portion 55a of the tightening member 55 is used, and the inner peripheral wall 32a is brought into close contact with the shaft portion 55a by press-fitting the shaft portion 55a into the inner peripheral wall 32a. Can be done.

The waterproof member 11 of the present embodiment further has a second connecting portion 43 that connects the inner peripheral wall 32a and the outer peripheral edge portion 41 on the upper surface side (cover main body 54 side) of the main body plate 21. The second connecting portion 43 is also composed of a rubber-like elastic body 22. The waterproof member 11 is also in contact with the lid main body 54 of the second connecting portion 43.

As shown in FIG. 4, the shape of the contact portion 34 can be changed to a shape that protrudes toward the lid main body 54. That is, the second connecting portion 43 may be arranged apart from the lid main body 54.

According to the above-mentioned second embodiment, the following actions and effects are exhibited in addition to the actions and effects of the first embodiment.
(2-1) According to the waterproof member 11 of the second embodiment, the adhesion between the mounting portion 31 of the waterproof member 11 and the lid main body 54 is obtained by the contact portion 34 formed of the rubber-like elastic body 22. be able to. As a result, it is possible to prevent water from entering the through hole 32 through the space between the waterproof member 11 and the lid main body 54. Further, the adhesion between the through hole 32 in the mounting portion 31 of the waterproof member 11 and the shaft portion 55a of the tightening member 55 can be obtained by the inner peripheral wall 32a made of a rubber-like elastic body. As a result, it is possible to further suppress the intrusion of water into the case 52 from the through hole 32 through which the tightening member 55 is inserted. Therefore, the waterproof property of the electronic device 51 can be further improved.

(2-2) In the lid member 53, when an external force is applied to the waterproof member 11, the inner peripheral wall 32a of the through hole 32 is elastically deformed, so that the waterproof member 11 can move relative to the lid main body 54. Become. That is, when an external force is applied to the waterproof member 11, the position of the waterproof member 11 with respect to the lid main body 54 is finely adjusted in the direction along the lower surface (inner surface) of the lid main body 54. As a result, the outer peripheral edge portion 41 of the waterproof member 11 can be easily fitted into the opening 52a in the case 52 of the electronic device 51.

For example, when the lid body 54 and the case 52 of the electronic device 51 are connected by a hinge mechanism, the dimensional tolerance of the waterproof member 11 or the like easily affects the operation of closing the lid member 53. In this regard, as described above, by finely adjusting the position of the waterproof member 11, the operation of closing the lid member 53 can be performed more smoothly.

(2-3) When the shape of the contact portion 34 is such that the contact portion 34 protrudes toward the lid main body 54 as in the waterproof member 11 shown in FIG. 4, the tightening force of the tightening member 55 is the tightening force of the mounting portion 31. It becomes easier to concentrate on the contact portion 34. As a result, the contact portion 34 is suitably pressed against the lid main body 54, so that the adhesion between the contact portion 34 and the lid main body 54 can be improved. Therefore, the waterproof property of the electronic device 51 can be further improved.

Further, when the contact portion 34 has a shape protruding toward the lid main body 54, the contact portion 34 is likely to be elastically deformed when an external force is applied to the waterproof member 11 in the lid member 53. Therefore, the position of the waterproof member 11 with respect to the lid main body 54 is easily finely adjusted as described above, and as a result, the outer peripheral edge portion 41 of the waterproof member 11 is more easily fitted into the opening 52a in the case 52 of the electronic device 51. Become.

(Third Embodiment)
Next, the third embodiment of the waterproof member 11 will be described focusing on the differences from the second embodiment.
As shown in FIG. 5, the main body plate 21 of the waterproof member 11 of the present embodiment has a flat plate portion 21a and an annular protrusion 21b protruding toward the lid main body 54. The annular protrusion 21b has a curved shape around the through hole 32. The main body plate 21 configured in this way has a stepped portion connected to the annular protrusion 21b and the flat plate portion 21a. The mounting portion 31 of the waterproof member 11 is provided on the annular protrusion 21b. More specifically, the rubber-like elastic body 22 constituting the contact portion 33, the inner peripheral wall 32a, and the contact portion 34 is laminated on the annular protrusion 21b of the main body plate 21.

According to the above-mentioned third embodiment, in addition to the actions and effects of the first and second embodiments, the following actions and effects are exhibited.
(3-1) Since the main body plate 21 has an annular protrusion 21b, it is possible to increase the strength of the mounting portion 31 and its surroundings by the stepped portion connected to the annular protrusion 21b and the flat plate portion 21a. .. Therefore, for example, in the lid member 53, the posture of the waterproof member 11 is stabilized, so that the waterproof performance can be stably exhibited.

(3-2) In the main body plate 21 of the present embodiment, the head 55b of the tightening member 55 does not protrude from the lower surface of the waterproof member 11 by adjusting the protruding height of the annular protrusion 21b with respect to the flat plate portion 21a. It can also be changed to. In this case, for example, it is possible to prevent the head 55b of the tightening member 55 from being caught by the member inside the case 52.

(Change example)
-In the waterproof member 11 of the first embodiment, the first connecting portion 42 may be omitted.
The waterproof member 11 of the first embodiment may be composed of a rubber-like elastic body 22 and may further have a second connecting portion for connecting the outer peripheral edge portion 41 on the upper surface side of the main body plate 21.

-In the waterproof member 11 of the second and third embodiments, at least one of the first connecting portion 42 and the second connecting portion 43 may be omitted.
-In the second and third embodiments, the rubber-like elastic body forming the contact portion 33 and the rubber-like elastic body forming the inner peripheral wall 32a of the through hole 32 are provided on the main body plate 21 so as to be separated from each other. You can also.

-In the second and third embodiments, the rubber-like elastic body forming the contact portion 34 and the rubber-like elastic body forming the inner peripheral wall 32a of the through hole 32 may be provided on the main body plate 21 so as to be separated from each other. can.

The main body plate 21 of the waterproof member 11 is arranged at a position sandwiched between the head 55b of the tightening member 55 and the lid main body 54. As shown in FIG. 6, the head of the tightening member 55 It is also possible to change the position so that the main body plate 21 is not arranged at the position sandwiched between the 55b and the lid main body 54, and only the rubber-like elastic body 22 is arranged. However, from the viewpoint of suppressing excessive deformation and bending of the mounting portion 31, the main body plate 21 of the waterproof member 11 is arranged at a position sandwiched between the head 55b of the tightening member 55 and the lid main body 54. Is preferable.

-It is also possible to further provide a cushioning member or an electrode for cushioning the impact on the lower surface side (inside of the case 52) of the waterproof member 11.
-Although the tip of the shaft portion 55a of the tightening member 55 is embedded in the lid main body 54, the tip of the shaft portion 55a may be exposed on the outer surface of the lid main body 54. In this case, if necessary, a cover member covering the tip of the shaft portion 55a can be provided on the lid main body 54. Further, the tightening member 55 may be tightened by inserting the shaft portion 55a of the tightening member 55 into the insertion hole formed in the lid main body 54 and screwing the nut. That is, the tightening member 55 can be provided without screwing the shaft portion 55a of the tightening member 55 into the lid main body 54.

11 ... Waterproof member, 21 ... Main body plate, 21a ... Flat plate part, 21b ... Circular protrusion, 22 ... Rubber elastic body, 31 ... Mounting part, 32 ... Through hole, 32a ... Inner peripheral wall, 33 ... Contact part, 34 ... contact part, 41 ... outer peripheral edge part, 51 ... electronic device, 52 ... case, 52a ... opening, 53 ... lid member, 54 ... lid body, 55 ... tightening member, 55a ... shaft part, 55b ... head ... ..

Claims (6)

A waterproof member used as a constituent member of a lid member that closes an opening of a case in an electronic device and having a main body plate and a rubber-like elastic body provided on the main body plate.
It has a mounting portion that can be attached to the lid body by providing a tightening member having a shaft portion and a head connected to the shaft portion.
The mounting portion has a through hole through which the shaft portion of the tightening member is inserted, and a contact portion provided so as to surround the through hole and with which the head portion of the tightening member abuts.
A waterproof member characterized in that an outer peripheral edge portion that is in close contact with the inner wall of the opening of the case and the contact portion are formed of the rubber-like elastic body. The mounting portion has a contact portion that comes into contact with the lid body, and has a contact portion.
The contact portion is provided so as to surround the through hole.
The waterproofing according to claim 1, further characterized in that the contact portion and the inner peripheral wall extending in the circumferential direction of the through hole are formed of the rubber-like elastic body while contacting the shaft portion of the tightening member. Element. The waterproof member according to claim 2, wherein the contact portion has a shape protruding toward the lid body. The main body plate has a flat plate portion and an annular protrusion portion that projects toward the lid main body.
The waterproof member according to any one of claims 1 to 3, wherein the mounting portion is provided on the annular protrusion. A lid member that closes the opening of a case in an electronic device.
With the lid body
A waterproof member having a main body plate and a rubber-like elastic body provided on the main body plate,
A tightening member for attaching the waterproof member to the lid body is provided.
The tightening member has a shaft portion and a head connected to the shaft portion, and has a shaft portion.
The waterproof member has a mounting portion that is attached to the lid body.
The mounting portion has a through hole through which the shaft portion of the tightening member is inserted, and a contact portion provided so as to surround the through hole and with which the head portion of the tightening member abuts.
A lid member characterized in that the outer peripheral edge portion of the waterproof member that is in close contact with the inner wall of the opening of the case and the contact portion of the waterproof member are formed of the rubber-like elastic body. A waterproof structure for an electronic device including the lid member according to claim 5.
A waterproof structure having a structure in which an opening of a case in the electronic device is closed by the waterproof member.

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