JPH11325514A - Electronic equipment cover and method of forming the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic equipment cover which is not partially reduced in strength by contraction after molding. SOLUTION: A front cover 3 for covering the front and upper surfaces of an outdoor unit of an air conditioner is formed of a cover body 3a and a cover extension 3b, a threaded hole is formed in a boss 3c which projects from the rear end of the cover extension 3b in parallel to the cover body 3a, and a rib 3d is formed between the boss 3c of the cover extension 3b and the cover body 3a integrally therewith. A screw 6 is screwed into the threaded hole of the boss 3c through a rear cover 4 that covers the rear surface of the outdoor unit of the air conditioner, so that the rear cover 4 is fixed to the front cover 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device cover made of a synthetic resin material such as a front cover of an outdoor unit of an air conditioner or a cabinet of a television receiver, and a molding method thereof.

[0002]

2. Description of the Related Art A conventional example of an outdoor unit of an air conditioner is disclosed in Japanese Patent Application Laid-Open No. 8-200740. This is, as shown in FIG. 5, a blower 2a arranged on the substrate 1.
An electronic device 2 such as a heat exchanger and a heat exchanger 2b is covered by a substantially L-shaped front cover 3 and a rear cover 4 made of a synthetic resin material.

The front cover 3 is formed by a cover body 3a covering the front surface of the electronic device 2 and a cover extension 3b extending rearward at a right angle from the upper end of the cover body 3a and covering the upper surface of the electronic device 2. A protrusion 3c formed by bending the rear end of the cover extension 3b at a right angle and parallel to the cover body 3a is fitted over the upper end 4a of the rear cover 4, and a metal reinforcing plate 5 is provided on the lower surface of the cover extension 3b. As shown in FIG. 6, screws 6 are screwed into the screw holes 5a of the reinforcing plate 5 through the through holes of the upper end 4a of the rear cover 4 and the projections 3c, so that the rear cover 4 It is connected to. In FIG. 5, reference numeral 7 denotes a blowout frame fitted to the blowout opening 8 of the cover body 3a, and 9 denotes a suction opening formed in the rear cover 4.

[0004] The procedure for forming the front cover 3 will be described. As shown by a solid line in FIG.
And a rectangular movable mold 11 in which a square ejector pin 11a is integrally provided so as to be slidable, and a cover main body between the two molds 10, 11 is formed from an injection port 10a of the fixed mold 10. After the front cover 3 is molded by injecting a synthetic resin material into the gap 12a, the cover extension forming gap 12b, and the protrusion forming gap 12c, the movable mold 11 is fixed as shown by a virtual line in FIG. The front cover 3 is detached from the movable mold 11 by moving away from the mold 10 and sliding the square ejector pin 11a.

[0005]

In the above-mentioned conventional configuration,
When the injection-molded front cover 3 is cooled in the molds 10 and 11, the cover extension 3b is
While the protrusion 3c contracts in the direction of the arrow a toward the side a, the protrusion 3c enters the gap 12c and is not moved in the direction of the arrow a, so that the tensile force due to the contraction is concentrated on the root portion A of the protrusion 3c. , The strength of the root portion A is significantly reduced. For this reason, as shown in FIG.
When the screw 6 is screwed into the screw hole 5a to connect the rear cover 4 to the front cover 3, the screwing force may cause a crack at the root portion A of the projection 3c or break the root portion A. There is.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional disadvantages, an object of the present invention is to provide an electronic device cover in which the strength is not partially reduced by shrinkage after molding, and a method of molding the same.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a cover body for covering an electronic device and a cover extension extending substantially perpendicularly from the cover body are made of synthetic resin. A rib is integrally formed between the projection of the cover extension and the cover body in an electronic device cover integrally formed and provided with a projection projecting in a direction substantially perpendicular to the cover extension and parallel to the cover body. It is characterized by being.

According to the above configuration, the rib is integrally formed between the projection of the cover extension and the cover main body.
A synthetic resin material (for example, polypropylene or the like) which is inexpensive and has a large molding shrinkage because the tensile force generated by the shrinkage of the cover extension toward the cover body due to cooling after molding is dispersed to the ribs and the projections. Even when is used, the tensile force does not concentrate on the root portion of the projection, and a decrease in the strength of the projection can be prevented. Therefore, when, for example, the projection is used to fix a screw, there is no fear that the screwing force causes a crack at the root of the projection or the root is broken.

According to a second aspect of the present invention, in the first aspect of the invention, a plurality of the ribs are provided at intervals.

[0010] According to the above structure, since the tensile force applied to the projection is reduced by increasing the number of ribs, a decrease in the strength of the projection can be prevented more reliably.

[0011] The invention according to claim 3 is the invention according to claim 1 or 2.
In the invention described in the above, a front cover that covers a front surface and an upper surface of the outdoor unit of the air conditioner is formed by the cover body and the cover extension, and the projection is provided at a rear end of the cover extension, and the projection is The rear cover is fastened to the front cover by screwing a screw into the screw hole of the projection through a rear cover covering the rear surface of the outdoor unit of the air conditioner. It is characterized by:

According to the above construction, since the strength of the projection is prevented from being reduced by the rib, the root portion of the projection may be cracked due to the screwing force when screwing the screw into the screw hole of the projection. There is no fear that the root portion is broken, and the rear cover can be securely screwed to the front cover.

According to a fourth aspect of the present invention, a cover body for covering an electronic device and a cover extension extending substantially perpendicularly from the cover body are integrally formed of a synthetic resin material, and are substantially perpendicular to the cover extension. A method of molding an electronic device cover in which a projection that is protruded and provided in parallel with the cover main body is provided, wherein a mold for forming a cover main body forming gap, a cover extension forming gap, and a protrusion forming gap is provided. Ribs forming voids communicating with the cover extension molding voids are formed, and by filling each void with a synthetic resin material, a rib is integrally formed between the protrusion of the cover extension and the cover body. The electronic device cover is removed from the mold.

According to the above configuration, it is only necessary to add a rib forming space to the existing mold, and the mold cost is reduced.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show an air conditioner outdoor unit using a front cover (electronic device cover) 3 according to an embodiment of the present invention.
A plurality of (three in this embodiment) ribs are provided at the center of the rear end of the rear surface of the rear surface of the rear surface of the cover extension portion 3b with an interval between the protrusion 3c and the cover body 3a. 3d is integrally formed, and a screw hole 14 for screwing the screw 6 into the protrusion 3c is formed. Note that, in FIG.
Is a screw connecting the side plate 3e of the front cover 3 and the side plate 4a of the rear cover 4. Also, as shown in FIG.
A rib forming gap 12d communicating with the rib is formed. Since the configuration other than the above is substantially the same as the conventional example shown in FIGS. 5 to 7, the same portions are denoted by the same reference numerals and description thereof will be omitted.

The molding procedure of the front cover 3 will be described. As shown by a solid line in FIG.
And a rectangular movable mold 11 in which a square ejector pin 11a is integrally provided so as to be slidable, and a gap 12 between the two molds 10, 11 is provided from an injection port 10a of the fixed mold 10.
Inject synthetic resin into the front cover 3
After molding the movable mold 1 as shown by a virtual line in FIG.
1 is separated from the fixed mold 10 and the square ejector pin 1
1a, slide the front cover 3 from the movable mold 11
Is to be removed.

According to the above configuration, since the plurality of ribs 3d are integrally formed between the projection 3c of the cover extension 3b and the cover body 3a, the front cover 3 is formed as shown in FIG. Since the tensile force generated when the cover extension 3b is contracted in the direction of the arrow a toward the cover body 3a by the subsequent cooling is distributed to the ribs 3d and the projections 3c, the synthesis is inexpensive and the molding shrinkage is large. Even when a resin material (for example, polypropylene) is used, the protrusion 3
The tensile force does not concentrate on the base portion A of the protrusion c, and it is possible to reliably prevent the strength of the protrusion 3c from decreasing.

Accordingly, the screw 6 is inserted into the screw hole 14 of the projection 3c.
There is no possibility that the root portion A of the projection 3c will be cracked or the root portion A will be broken by the screwing force when screwing in the rear cover 4, and the rear cover 4 can be securely fixed to the front cover 3. In addition, by providing the rib 3d on the back surface of the cover extension 3b, the rib 3d is not visible from the outside, so that the appearance can be maintained well.

Further, the cavity 1 for forming a rib is formed in the existing mold 11.
You only need to add 2d and the mold cost is cheap.

In the above embodiment, three ribs 3d are provided. However, the present invention is not limited to this, and one, two, or four or more ribs 3d may be provided.

The front cover 3 of the air conditioner outdoor unit
However, the present invention is not limited to this, and can be applied to, for example, various electronic device covers made of a synthetic resin material such as a cabinet of a television receiver.

[0022]

According to the first aspect of the present invention, since the rib is integrally formed between the projection of the cover extension and the cover body, the cover extension faces the cover body by cooling after molding. Since the tensile force generated by the shrinkage is dispersed between the ribs and the protrusions, even when a synthetic resin material (for example, polypropylene or the like) that is inexpensive and has a large molding shrinkage is used, the protrusions may be formed at the base of the protrusions It is possible to prevent a reduction in the strength of the projection without the tensile force being concentrated. Therefore, when, for example, the projection is used to fix a screw, there is no fear that the screwing force causes a crack at the root of the projection or the root is broken.

According to the second aspect of the present invention, by increasing the number of ribs, the tensile force applied to the projection is reduced, so that the strength of the projection can be more reliably prevented from lowering.

According to the third aspect of the present invention, since the strength of the protrusion is prevented from lowering by the rib, a crack is formed at the root of the protrusion by the screwing force when screwing the screw into the screw hole of the protrusion. The rear cover can be securely screwed to the front cover without any risk of occurrence or breakage of the root portion.

According to the fourth aspect of the present invention, it is only necessary to add a rib forming space to the existing mold, and the mold cost is reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an air conditioner outdoor unit using a front cover according to an embodiment of the present invention.

FIG. 2 is an enlarged longitudinal sectional view of the main part.

FIG. 3 is an exploded perspective view of the front cover and the rear cover.

FIG. 4 is a vertical sectional view showing a procedure for forming the front cover.

FIG. 5 is a longitudinal sectional view showing a conventional example.

FIG. 6 is an enlarged vertical sectional view of the main part.

FIG. 7 is a vertical sectional view showing a procedure for forming the front cover.

[Explanation of symbols]

 Reference Signs List 2 electronic equipment 3 front cover (electronic equipment cover) 3a cover main body 3b cover extension 3c projection 3d rib 4 rear cover 6 screw 10 fixed mold 11 movable mold 12a cover body molding gap 12b cover extension molding gap 12c projection Void for forming part 12d Void for forming rib 14 Screw hole

Claims (4)

[Claims] 1. A cover body for covering an electronic device and a cover extension extending substantially perpendicularly from the cover body are integrally formed of a synthetic resin material, and project from the cover extension substantially perpendicularly to the cover body. An electronic device cover provided with parallel projections, wherein a rib is integrally formed between the projection of the cover extension and the cover body. 2. The electronic device cover according to claim 1, wherein a plurality of said ribs are provided at intervals. 3. A front cover for covering a front surface and an upper surface of the outdoor unit of the air conditioner is formed by the cover body and the cover extension, and the projection is projected from a rear end of the cover extension and the projection is formed. The rear cover is fastened to the front cover by screwing a screw into the screw hole of the projection through a rear cover covering the rear surface of the outdoor unit of the air conditioner. 3. The electronic device cover according to claim 1, wherein: 4. A cover main body for covering the electronic device and a cover extension extending substantially perpendicularly from the cover main body are integrally formed of a synthetic resin material, and project from the cover extension substantially perpendicularly to the cover main body. A method of molding an electronic device cover provided with parallel projections, wherein the cover extension molding is formed in a mold in which a cover body molding cavity, a cover extension molding cavity, and a projection forming cavity are formed. A rib-forming gap communicating with the gap is formed, and by filling each gap with a synthetic resin material, the electronic device cover integrally formed with a rib between the protrusion of the cover extension and the cover body is formed. A method for forming a cover of an electronic device, wherein the cover is taken out of a mold.