JP3209415B2 - Waterproof sealing structure of case opening - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for waterproofly sealing an opening of a case using a lid and an O-ring.

[0002]

2. Description of the Related Art FIGS. 9 and 10 show a conventional structure for waterproofly sealing an opening of a case with a lid and an O-ring.
Are known. That is, case 31
The O-ring 33 is fitted into the O-ring groove 32 provided on the opening end surface 31a of the first case, the opening of the case 31 is sealed with the cover 34, and the cover 34 is in close contact with the end surface of the case 31 by a plurality of screws 35. Then, the O-ring 33 is elastically deformed.

[0003] However, the above-mentioned waterproof sealing structure requires a plurality of screws 35 each time the opening of the case 31 is opened and closed by the lid 34.
It is necessary to perform tightening and release of the cover, and opening and closing the cover is extremely troublesome. For this reason, the cover 3
When it is necessary to open and close 4, it is difficult to adopt. Also,
Since the waterproof property along the circumferential direction of the O-ring 33 depends on the tightening state of the plurality of screws 35, the circumferential state of the O-ring 33 must be uniform unless the screws 35 are tightened equally. Waterproofing along the direction is not even. That is, each screw 35
Is uneven, the waterproofness along the circumferential direction of the O-ring 33 is also uneven, and the reliability of the waterproof is lacking.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to achieve high waterproofness, and furthermore , to cover the opening of the case with a lid.
An object of the present invention is to provide a waterproof sealing structure with a case opening having a good appearance in a sealed state .

[0005]

According to a first aspect of the present invention , there is provided an O-ring mounting body having an annular shape corresponding to the inner peripheral surface of the opening recess of the case on the back surface of the lid. An O-ring is mounted on the outer peripheral surface of the O-ring mounted body, and the O-ring mounted body of the lid is fitted into the opening concave portion of the case, and the back surface of the lid abuts on the open end surface of the case. In this state, the O-ring mounted on the outer peripheral surface of the O-ring mounted body is elastically contacted with the inner peripheral surface of the opening concave portion of the case, and the case and the lid are mutually provided with locking members. The opening of the case is O-ring
In the structure for waterproof sealing using a
The mating plate parts are located on the opposite parts of the body
The periphery that protrudes toward and forms the opening recess of the case
Each of the fitting plates of the lid is fitted to the wall body.
The fitting portion is provided, and each fitting plate portion of the lid is
The O-ring provided on the lid by being fitted to the fitted portion,
In a state where the opening is in elastic contact with the inner peripheral surface of the concave portion, the opening
The end surface of the wall around the recess is almost the same as the top of the lid
The feature is that it is a surface.

As described above, according to the present invention, each fitting plate portion of the lid is provided.
Is fitted to each fitting part of the case, and provided on the lid.
When the O-ring is in elastic contact with the inner peripheral surface of the opening recess,
And an end surface of a wall around the opening concave portion and an upper surface of the lid.
Are almost flush with each other.
Is sealed by the lid,
When there are no irregularities on the side of the lid,
In addition, there is an advantage that the product is not caught by peripheral articles. Ma
Separation of the case and the lid simply releases the lock between them.
Can be done immediately. In this case,
According to the second aspect of the present invention, an unlocking piece is provided on the lid body.
Thus, the case and the lid can be more easily released. Furthermore,
Like the invention of claim 3, the invention of claim 1 or 2
All components are provided, and the lid is made of a transparent material
And a watertight seal of the case opening by the lid and the O-ring.
There is an advantage that the state can be visually recognized.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to an example in which the present invention is applied to a case containing a button battery of a remotely operable automobile key. FIG.
Is a remotely operable automobile key K in which a button cell B is accommodated in a case C by a waterproof and sealed structure according to the present invention.
FIG. 2 is a bottom view of the car key K with one holder body 3b removed, and FIG.
FIG. 4 is an exploded perspective view of a remote control unit U housed in a holder portion H of a car key K, FIG. 4 is a perspective view of a state in which a lid L and an O-ring R are separated, and FIG. FIG. 6 is a cross-sectional view of the remote operation unit U in which the case C and the cover L are separated from each other. FIG. 6 is a perspective view of a state in which the opening concave portion 6 on the back surface of the case C is waterproofly sealed by the cover L. Yes,
7 is a cross-sectional view (enlarged cross-sectional view taken along the line XX of FIG. 2), and FIG. 8 is a plan view of the case C with the lid L removed. 1 and 2, the car key K is
The key body 1 is provided integrally with the holder portion H, and a remote operation unit U is stored in a storage groove 2 (see FIG. 2) provided in the holder portion H. The remote control unit U is an electronic device for automatically locking and unlocking the door, opening and closing the trunk, and the like by remote control in a state where the vehicle key K is taken out of the vehicle compartment. The holder part H is composed of a pair of holder bodies 3a and 3b. The key body 1 is integrally attached to one of the holder bodies 3a, and a plurality of button windows 4 provided on the holder body 3a have The plurality of operation buttons 5 of the remote operation unit U are inserted from inside, and the button window 4 is inserted.
Facing the opening. The operation button 5 is provided on the front side of the case C of the remote operation unit U, and a control board V (see FIG. 5) is housed therein,
A button battery B serving as a power supply is accommodated in the opening recessed portion 6 provided on the back (bottom) side of the case C.

Next, the waterproof sealing structure of the opening of the case C according to the present invention will be described. As shown in FIG. 3 to FIG. 7, an opening recess 6 whose periphery is surrounded by a wall 7 is provided on the bottom side of the case C.
Is provided with a circular battery insertion groove 8 for inserting the button battery B in the center. Opposing portions of the wall 7 are missing, and each missing portion is
Each of the fitting plates 9a, 9b of the lid L for sealing the button battery B inserted in the waterproof structure (see FIGS. 3 and 5) is a fitted portion 10a, 10b. . As shown in FIGS. 3 and 8, the circular battery insertion groove 8 has three arc-shaped walls 11 a, 11 b,
11c. The arc walls 11a, 11b and 11c are formed by these three divided arc walls.
A first locking piece 12 is provided at the upper end of 1c toward the battery insertion groove 8, and a second locking piece 13 is provided between the arc-shaped walls 11a and 11b. The first and second locking pieces 12, 1 are provided so as to face each other.
3 is releasably locked to the outer peripheral edge of the button battery B inserted into the battery insertion groove 8, so that the button battery B does not come off. Further, first and second contacts 14 and 15 of the button battery B are provided on the bottom of the battery insertion groove 8 and inside the arc wall 11c, respectively. Each contact 1
Reference numerals 4 and 15 are composed of leaf spring pieces.

Also, as shown in FIGS. 3 to 7,
In a state where the button battery B is inserted into the battery insertion groove 8 provided at the center of the opening concave portion 6 on the bottom side of the case C,
A cover L is covered on the opening of the opening recess 6 of the case C, and the opening is sealed in a waterproof state of the opening recess 6.
The lid L is entirely formed of a transparent resin, and fitting plate portions 9a and 9b project outward from opposing portions of the outer peripheral surface of the disk-shaped main body portion 16, respectively. Locking plate portions 17a and 17b are provided on the fitting plate portions 9a and 9b, respectively, facing downward. Locking convex portions are formed on the lower ends of the locking plate portions 17a and 17b, respectively. 18a and 18b are protruded. As shown in FIGS. 4 and 5,
One fitting plate portion 9b is provided with a locking plate portion 17b at the front end thereof, and the other fitting plate portion 9a
Is provided with a locking plate portion 17a facing downward from a portion entering the inside from the front end portion, and a portion of the fitting plate portion 9a outside (front end side) of the locking plate portion 17a is It is a release piece 19 for facilitating the release of the lock of the lid L locked to the case C. On the back surface of the main body 16 of the lid L, an annular O-ring mounting body 21 having an inverted L-shaped cross section is provided integrally, and an O-ring R is mounted outside the O-ring mounting body 21. I have.

On the other hand, the wall 7 is provided on the bottom surface side of the case C so as to surround the battery insertion groove 8.
The two opposing portions of the wall 7 are missing from both the upper surface and the outer surface of the wall 7, and the wall portion remaining in the missing portion is provided with each locking portion of the lid L. The locking projections 18a, 18b provided at the lower ends of the plate portions 17a, 17b are locked portions 22 to be locked. As shown in FIG.
The locking plate portions 17a, 17
There is provided a locked concave portion 22a in which the locking convex portions 18a and 18b at the lower end of b are locked. The inner peripheral surface 6a of the opening concave portion 6 is formed in a circular shape so that the O-ring R can be fitted therein.

A button battery B is inserted into a battery insertion groove 8 provided at the center of the opening concave portion 6 on the rear surface side of the case C.
It is releasably locked by the second locking pieces 12 and 13 and inserted into the battery insertion groove 8. As shown in FIGS. 6 and 7, the button battery B is inserted into the battery insertion groove 8, and the cover 10 is fitted to the fitted portions 10 a and 10 b provided in the respective notches of the wall 7 on the back surface of the case C. L of each fitting plate 9a,
In the state where 9b is fitted, the entire body 16 of the lid L is fitted into the opening concave portion 6. In this state, FIG.
As shown in the figure, the O-ring R mounted on the outside of the O-ring mounting body 21 of the lid L is elastically deformed in a sectional view,
By elastically contacting the inner peripheral surface 6a of the opening recessed portion 6, waterproofing of the portion can be achieved, and each of the locking projections 18a, 18b provided at the lower end of each of the locking plate portions 17a, 17b of the lid L, The lid L is locked by the locked concave portion 22a provided in the missing portion of the wall 7 of the case C so as not to come off the case C. With this structure, the opening of the opening concave portion 6 of the case in which the button battery B is inserted into the internal battery insertion groove 8 is hermetically sealed by the lid L. Further, in the above embodiment, since the entire lid L is formed of the transparent resin, there is an advantage that the waterproof sealing state can be visually recognized in a state where the opening concave portion 6 of the case C is sealed with the lid L waterproof. .

As described above, the fitting plates 9a, 9b of the lid L are fitted into the fitted portions 10a, 10b provided in the respective notches of the wall 7 of the case C, and As shown in FIG. 7, when the entire body 16 is fitted into the opening recess 6, the rear surfaces of the fitting plates 9 a and 9 b of the cover L are respectively The upper surface 22a of the wall body 7 and the upper surface of the lid L are substantially flush with each other so as to come into contact with the upper end surface 22b of the locked portion 22 provided in (See FIG. 6). Also, as described above,
The opening of the opening concave portion 6 of the case C is covered by the lid L, and the back surface of each of the fitting plate portions 9a and 9b of the lid L is a locked portion provided at each of the missing portions of the wall 7 of the case C. 22 upper end surface 2
By abutting on the case 2b, the fitting position of the lid L with respect to the case C is uniquely determined. As a result, the O
Since the O-ring R mounted on the outside of the ring mounting body 21 is uniformly elastically deformed over the entire circumference, the waterproofness along the circumferential direction of the O-ring R becomes uniform, and the waterproofness is improved. Enhanced.

To remove the cover L for replacing the button battery B, etc., as shown in FIG.
A gap 2 formed between one fitted portion 10a of the wall body 7 and the release piece 19 of the lid L disposed in the portion.
When the tip of the finger F is inserted into the cover 3 and a force is applied to the cover L in a direction in which the lock with the case C is released, as shown by a two-dot chain line in FIG. L is rotated about the locking portion opposite to the release piece 19, and the case C and the lid L are rotated.
Is easily released.

The above-described example is merely an embodiment of the present invention defined in the appended claims, and is implemented in the following forms variously modified from the above-described embodiment. Are also included in the present invention. For example, in the above-described embodiment, the opening recess is circular, but in relation to the storage items stored in the case, the opening recess is not limited to a circle, and may be an ellipse or the like. The present invention can be implemented also for waterproof sealing of a case having an opening concave portion having a shape other than the above.

Further, in the above embodiment, the present invention is applied to the case C containing the button battery B of the car key K which can be remotely operated to protect the button battery B from being waterproof. If it has a structure in which the opening of the case is waterproofly sealed using the lid and the O-ring, it is also applied to the case of other devices other than the car key, and the waterproofing of the contents stored in the case is performed. Protection can be achieved. In this case, the lid is easily released from the case, which is particularly effective for applications where the lid needs to be periodically removed.

[0016]

【The invention's effect】

The present invention is characterized in that the fitting plate portions project outward from the opposing portions of the main body portion of the lid so as to protrude outwardly, and the peripheral wall forming the opening concave portion of the case is provided with the above-mentioned structure. An O-ring provided on the lid is provided by providing a fitted portion to which each fitting plate portion of the lid is fitted, and fitting each fitting plate portion of the lid to each fitted portion of the case. in the state in which elastic contact with the inner peripheral surface of the opening recess, waterproofing the end surface of the wall around the aperture concave, since the upper surface of the lid is substantially flush with the composed structure, contained goods inside the casing by the lid In a sealed state, there are no irregularities on the side of the lid of the case, so that the external appearance is improved and there is an advantage that it is not caught by peripheral articles.
If the lid is provided with an unlocking piece, the case and the lid
And the lid is made of transparent material.
Then, the cover and the O-ring make the case opening waterproof and tight.
There is an advantage that the sealed state can be visually recognized.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a remotely operable automobile key K in which a button cell B is housed in a case C by a waterproof and sealed structure according to the present invention.

FIG. 2 is a bottom view of the car key K with one holder body 3b removed.

FIG. 3 is an exploded perspective view of a remote operation unit U housed in a holder portion H of the vehicle key K.

FIG. 4 is a perspective view of a state in which a lid L and an O-ring R are separated.

FIG. 5 is a sectional view of the remote operation unit U in a state where a case C and a lid L are separated.

FIG. 6 is a perspective view showing a state in which an opening concave portion 6 on the back surface of a case C is sealed by a lid L in a waterproof manner.

FIG. 7 is a sectional view (an enlarged sectional view taken along line XX of FIG. 2).

FIG. 8 is a plan view of the case C with the lid L removed.

FIG. 9 is a cross-sectional view of a conventional waterproof sealing structure of a case opening using a lid and an O-ring.

FIG. 10 is an exploded perspective view of components related to a conventional waterproof sealing structure.

[Explanation of symbols]

 C: Case L: Cover R: O-ring 6: Opening recess 6a: Inner peripheral surface of opening recess 9a, 9b: Fitting plate portion of lid 10a, 10b: Fitting portion of case 17a, 17b: Covering portion Locking plate portions 18a, 18b: Locking convex portion (locking portion) of lid 19: Release piece 21: O-ring mounted body 22: Locked portion 22a: Locked concave portion (locking portion)

────────────────────────────────────────────────── (5) References JP-A-9-30546 (JP, A) Registered utility model 3027552 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65D 53 / 02 H05K 5/06

Claims (3)

(57) [Claims] 1. An O-ring mounting body having an annular shape corresponding to the inner peripheral shape of an opening concave portion of a case is protruded from a back surface of a lid, and an O-ring is mounted on an outer peripheral surface of the O-ring mounting body. In the state where the O-ring mounting body of the lid is fitted into the opening concave portion of the case and the back surface of the lid is in contact with the opening end surface of the case,
The O-ring mounted on the outer peripheral surface of the O-ring mounted body,
Case together are elastically contacted with the inner peripheral surface of the opening recess, the case and the lid, is sealed releasably engaged via a locking portion provided in the other, the lid the opening of the case and the O Ring and
In the structure for waterproofing and sealing, the lid body is fitted to the opposing portions of the main body.
The plate protrudes outward to form a recessed opening in the case
Each fitting plate of the lid is attached to the surrounding wall
A fitting portion to be fitted is provided, and each fitting plate portion of the lid is provided.
Is fitted to each fitting part of the case, and provided on the lid.
When the O-ring is in elastic contact with the inner peripheral surface of the opening recess,
And an end surface of a wall around the opening concave portion and an upper surface of the lid.
Is characterized by being almost flush with the case.
Waterproof sealing structure of mouth. 2. The waterproof sealing structure for a case opening according to claim 1, wherein the cover is provided with a release piece for facilitating release of the engagement with the case. 3. The lid is made of a transparent material, and the lid and O
The waterproof sealing structure for a case opening according to claim 1 or 2, wherein a waterproof sealing state of the case opening by the ring is visible.