JP3299306B2 - Waterproof case for electrical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof case for electric equipment for waterproofing a sensor head of a laser displacement meter, for example.

[0002]

2. Description of the Related Art As a waterproof case of a conventional laser displacement meter, a lid is screwed to an open end of a case main body for accommodating the laser displacement meter, and the lid is fixed along a contact surface between the open end of the case main body and the lid. An elastic watertight packing is interposed. As shown in FIGS. 4A and 4B, the watertight packing 30 is formed in substantially the same shape as the outer shape of the opening end of the case main body, not shown. Is provided with a rib 32 which is fitted along the inner surface of the opening end of the case body, and the lid 3
A screw hole 33 is formed in the corner portion of the housing 1 and a lid (not shown) is inserted through the screw hole 33 in a state where the watertight packing 30 is closely fitted to the outer peripheral edge 32a of the rib 32. The body 31 is fixed to the open end of the case body so that the sensor head of the laser displacement meter housed in the case body can be waterproofed.

[0003]

However, FIG.
(A) If the outer periphery of the rib 32 protruding from the back surface 31a of the lid 31 shown in (b) has a simple shape, a conventional watertight packing 30 can be used. For example, as shown in FIG. When the outer contour of the rib 32 has a complicated constricted shape, the watertight packing 30 fitted on the outer peripheral edge 32a of the rib 32 also has a substantially identical constricted shape. In this case, the watertight packing 3
The inner dimension of 0 is designed to be slightly smaller than the outer dimension of the rib 32, and since the watertight packing 30 is made of a rubber material, the constricted portion 30a of the watertight packing 30 is moved from the constricted portion 32b of the rib 32 in the direction of the arrow. , And the watertight packing 30 tends to come off when assembling the waterproof case, which causes a problem that the assembling becomes extremely difficult.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to remove the watertight packing when assembling the waterproof case, even when the watertight packing has a complicated constricted shape. To provide a waterproof case for electrical equipment that is easy to assemble.
There in that Kyosu.

[0005]

In order to solve the above-mentioned problems, according to the present invention, a lid 2 is screwed to an open end of a case main body 4 containing electric equipment, and the open end of the case main body 4 and the lid 2 are fixed. In the waterproof case 1 of the electric device in which the watertight packing 3 is interposed along the contact surface 4f, the watertight packing 3 is formed to have substantially the same shape as the outer shape of the open end of the case body 4 and the lid body. 2 projecting from the back surface 2a
The watertight packing 3 is tightly fitted to the outer peripheral edge 11a of the
A screw insertion hole 17 through which a screw 7 for fastening the lid 2 to the case body 4 is formed, and a constricted portion 25 of the watertight packing 3 are formed in a constricted portion 25 bent inward.
The screw 7 is attached to the constricted portion 15 of the rib 11 corresponding to
A screw insertion hole 12 to be inserted is formed .

[0006]

According to the present invention, a screw insertion hole 17 is formed in the watertight packing 3 interposed along the contact surface 4f between the case main body 4 and the lid 2, and the lid 2 is fastened to the case main body 4. Since the screw is inserted through the screw insertion hole 17,
Since the watertight packing 3 can be attached along the back surface 2a of the lid 2, the watertight packing 3 does not easily come off the lid 2. Thereby, even if the watertight packing 3 has a complicated constricted shape, by forming the screw insertion hole 17 in the constricted portion 25, there is a possibility that the watertight packing 3 may escape when the waterproof case 1 is assembled. The waterproof case 1 can be easily assembled as compared with the case where the conventional watertight packing is simply brought into close contact with the rib of the lid.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the sensor head of the laser displacement meter housed in the waterproof case 1 has a constricted shape, and the lid 2 and the watertight packing 3 of the waterproof case 1 are constricted with the constricted shape of the sensor head. What is designed in shape is exemplified. As shown in FIGS. 3 (a) and 3 (b), the waterproof case 1 of the laser displacement meter has a case body 4 having an open upper part for storing a laser displacement meter (not shown).
And a lid 2 screwed to the contact surface 4f of the upper opening end of the case body 4 and a watertight packing 3. The case body 4, the lid 2 and the watertight packing 3 are formed.
Is designed to have the same outer shape as the constriction shape of the sensor head of the laser displacement meter. The front and rear walls 4a and 4b at the upper open end of the case main body 4 have a constricted portion 5 bent inward and a straight portion 6 facing the constricted portion 5. The constricted portion 5 and the straight portion 6 have A first screw hole 8 into which the first screw 7 is screwed is formed respectively, and a second screw 9 into which the second screw 9 is screwed is provided on both left and right walls 4c and 4d of the upper opening end of the case body 4. Screw holes 10 are respectively formed. As shown in FIG. 1B, the back surface 2a of the lid 2 has a constricted rib 11 along the outer shape of the lid 2.
In a state where the lid 2 is attached to the open end of the case body 4, the inner surface 4 e of the open end of the case body 4 (FIG.
(See (b))). The rib 11 has a cut portion formed in a constricted portion 15 bent in the same direction as the constricted portion 5 of the case main body 4 and a straight portion 16 opposed to the constricted portion 15. First screw hole 8
The first screw insertion holes 12 respectively corresponding to are formed. Further, the second screw insertion holes 13 corresponding to the second screw holes 10 of the case main body 4 are provided at the corners of the lid 2.
Are drilled.

On the other hand, as shown in FIG. 1A, the watertight packing 3 attached to the rib 11 of the lid 2
The inner dimensions of the watertight packing 3 are designed to be slightly smaller than the outer dimensions of the ribs 11, and the watertight packing 3 is tightly fitted to the outer peripheral edge 11 a of the ribs 11. Can be combined. A wide annular portion 14 is integrally formed with a narrow portion 25 corresponding to the narrow portion 15 of the lid 2 of the watertight packing 3 and a straight portion 26 facing the narrow portion 25, respectively. The inside is a screw insertion hole 17 corresponding to the first screw insertion hole 12 of the rib 11.
This watertight packing 3 is attached to the outer peripheral edge 11 a of the rib 11 of the lid 2.
The cover 2 is inserted into the screw insertion hole 17 with the cover 2
The first screws 7 inserted from the respective screw insertion holes 12 are respectively inserted to prevent the watertight packing 3 from coming off the ribs 11 of the lid 2.

When assembling the waterproof case 1, as shown in FIG. 3 (a), the first screws 7 are inserted into the first screw insertion holes 12 from the surface of the lid 2 respectively. The watertight packing 3 is tightly fitted along the outer peripheral edge of the rib 11 from the back surface 2a of the cover 2 so that the two screw insertion holes 17 of the watertight packing 3 are protruded from the back surface 2a of the lid 2 by the first screw 7. Fit into At this time, as shown in FIG. 2, since the constricted portion 25 of the watertight packing 3 is held by the first screw 7, the escape of the constricted portion 25 of the watertight packing 3 is prevented, and the waterproof case 1 is easily assembled. Can be. That is, as shown in FIG.
a and the surface 2b are inverted, the watertight packing 3 is
The rib 11 of the lid 2 can be easily fitted along the open end of the case main body 4 in which the laser displacement meter is stored. In addition, since the lid 2, the watertight packing 3, and the case body 4 have the same constricted shape, the mounting direction of the lid 2 and the watertight packing 3 is clear, and the lid 2 and the watertight packing 3 are connected to the case body 4, And the first screw 7 is fastened to the first screw hole 8 of the case body 4 respectively, and the second screw 9 is inserted into the case 2 through the second screw insertion hole 13 of the lid 2. The sensor head of the laser displacement meter can be easily assembled simply by screwing and fastening to the second screw hole 10 of the main body 4.

In the present embodiment, the center of the constricted portion 15 of the rib 11 is divided to form a first screw insertion hole 12, and the constricted portion 25 of the watertight packing 3 is formed at the divided portion.
Of the watertight packing 3 is reliably prevented from escaping from the ribs 11, and the watertight packing 3 can be made more difficult to come off from the lid 2.

As another embodiment of the present invention, the ribs 11 are not provided on the back surface 2a of the lid 2 and the smooth back surface 2a of the lid 2 is provided.
A rubber plate-like watertight packing may be interposed on a contact surface 4f between the case and the opening end of the case body 4. in this case,
If the lid 2 is screwed to the case body 4 via the watertight packing 3 as in the above embodiment, there is an advantage that the waterproof case 1 can be manufactured using the lid 2 without the rib 11.

The electric equipment housed in the waterproof case 1 of the present invention is not limited to the above laser displacement meter, and is particularly used after a packing is attached to a rib having a complicated shape, for example, gas in a cylinder portion of an engine or the like. It can also be used as a packing for preventing oil leakage.

[0013]

According to the present invention, as described above, the watertight packing interposed along the contact surface between the open end of the case body and the lid is formed to have substantially the same shape as the outer shape of the open end of the case body. and fits closely to the outer edge of the rib protruding from the back of the lid
Combined, corresponding to the constricted portion of the watertight packing with screw for fastening the lid to the case body in the constricted portion bent inward of the watertight gasket forms a screw insertion hole for inserting
Inserting the above screw into the narrow part of the rib
Since those bored holes, even when the water-tight packing has a complex constricted shape, screw insertion holes from the surface of the lid
Into the ribs, and fit the watertight packing into the ribs on the back of the lid
The screws that protrude from the back of the lid
By inserting the screw insertion hole of the kin, the escape of the watertight packing to the rib is surely prevented, and the watertight packing is
The kin can be made hard to come off, and the watertight packing can be attached along the back surface of the lid. as a result,
Assembly of the waterproof case is simplified, the work efficiency is achieved starts selling effect have the greatly improved.

[Brief description of the drawings]

FIG. 1 shows a watertight packing and a lid used in an embodiment of the present invention, wherein (a) is a front view of the watertight packing, and (b).
Is a front view seen from the back surface of the lid.

FIG. 2 is a front view showing a state in which a watertight packing is mounted on the lid body of the above.

FIG. 3 shows an assembling process of the waterproof case, in which (a) is an exploded view showing a process of attaching a watertight packing to a lid,
(B) is an exploded view showing a step of attaching the lid to the case body.

FIGS. 4A and 4B show a conventional watertight packing and a lid, wherein FIG. 4A is a front view of the watertight packing, and FIG.

FIG. 5 is a front view showing a state where a watertight packing is attached to a conventional lid.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Waterproof case 2 Lid 2a Back surface 3 Watertight packing 4 Case main body 4f Contact surface 7 Screw 11 Rib 11a Outer edge 12 Screw insertion hole 15 Constriction part 17 Screw insertion hole 25 Constriction part

Continuation of the front page (72) Inventor Hiroyuki Junno 1048 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Works, Ltd. (56) References Japanese Utility Model 1-87584 (JP, U) Japanese Utility Model 1-141964 (JP, U) ) Japanese Utility Model 4-12688 (JP, U) Japanese Utility Model Application 52-21709 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H05K 5/06

Claims (1)

(57) [Claims] 1. A waterproof case for electric equipment, wherein a lid is screwed to an open end of a case main body housing the electric equipment, and a watertight packing is interposed along a contact surface between the open end of the case main body and the lid. Wherein the watertight packing is formed in substantially the same shape as the outer shape of the opening end of the case main body.
Closely fitted to the outer periphery of the rib protruding from the back of the lid ,
A screw insertion hole through which a screw for fastening the lid to the case body is inserted is formed in a constricted portion that is bent inward of the watertight packing, and corresponds to a constricted portion of the watertight packing.
The above screw is inserted into the neck of the rib
A waterproof case for electrical equipment, characterized by having holes formed therein.