JP2001099868A - Cover and manufacturing method for electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems in the prior art that the cover of an electronic watthour meter needed many components, etc., such as components for mounting coating shaft jigs for the electrostatic coating and components for fixing the window glass used for the cover and also needed the masking process for parts to be fed with power in the electrostatic coating. SOLUTION: The cover comprises a metal frame 21 covering electronic circuits and an electrostatic coating member 34 fixed to the metal frame 21, the coating member 34 having a glass retainer 34b for fixing a window glass 22 to be mounted in the opening 21a of the metal frame 21 and a metal-made conducting part 34c which is integrated with the retainer 34b and electrically connected to the metal frame 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover, such as a cover of an electronic watt-hour meter, having an electrostatic coating member for electrically connecting an electrode and the cover when applying electrostatic coating. About. Further, the present invention relates to a method for manufacturing an electronic device using the cover.

[0002]

2. Description of the Related Art In general, in an electronic watt-hour meter, the internal elements of the meter are mostly constituted by electronic parts, and the structure is such that direct sunlight does not hit the electronic parts. for that reason,
The whole surface is not a glass cover like the induction type watt-hour meter,
A structure in which a flat window glass is attached to one end surface of the metal frame 1 is employed. The window glass is for reading an internal meter, for example.

FIG. 18 is a view showing a cover of a conventional electronic watt-hour meter, where (A) is a front view and (B) is a side sectional view. In the figure, 100 is a cover portion, 1 is a metal frame, 2 is a window glass adhered to the metal frame 1 by an adhesive portion 3, and 4 is a screw fixed to the metal frame 1 by welding or the like. The receiving metal pieces 5 and 5 are glass holding metal pieces, 6 is a screw, and 7 is a metal piece for painting that has a hanging hole 7a and is fixed to the metal frame 1 by welding or the like.

Next, a method of attaching the window glass 2 is shown in FIG.
8 will be described. Specifically, a description will be given of a structure in which a flat window glass 2 is bonded to one end surface of the metal frame 1 with an adhesive portion 3 and the window glass 2 is pressed until the adhesive portion 3 dries. First, an adhesive is applied to the bonding portion 3, and the window glass 2 is bonded to the metal frame 1. Next, the glass holding metal piece 5 is fixed to the screw receiving metal piece 4 with the screw 6. The glass pressing metal piece 5 presses the window glass 2 against the metal frame 1. After the window glass 2 is completely bonded to the metal frame 1, the screw receiving metal piece 4, the glass pressing metal piece 5, and the screw 6 may be removed.

Next, a method of electrostatically coating the cover 100 will be described with reference to FIG. FIG. 21 is a side sectional view showing a state where a conventional cover portion is hung on a coating jig. In the figure, portions denoted by the same reference numerals as those in FIG. 18 indicate the same or corresponding portions. 12 is a tip 1 on which the cover 100 is hung.
This is a painting jig provided with a plurality of hanging jigs 13 having 3a. First, the cover 100 is hung on the coating jig 12 as shown in the figure. More specifically, the hanging hole 7a of the coating metal piece 7 fixed to the metal frame 1 is hooked on the tip 13a of the hanging jig 13 of the coating jig 12 and set in a coating apparatus (not shown). . Thereafter, a painting process is performed.
The hanging hole 7a of the metal piece 7 for coating has a function of electrically connecting with the electrode of the coating apparatus and hanging the cover 100 in the coating process.

FIG. 19 is a side sectional view showing a cover portion of another conventional electronic watt-hour meter, which is provided with a countermeasure against static electricity. FIG. 20 is a conductive metal piece of the cover portion shown in FIG. (A) is a plan view and (B) is a front view. In the figure, 8 is a conductive metal piece, 8a is a conductive metal piece 8
, 9 is a short-circuit metal piece, 10 is a nameplate, and 11 is a mounting plate for mounting an electronic circuit unit.

Next, a structure for electrically connecting the cover portion 100 and an electronic circuit portion (not shown) will be described with reference to FIGS.
It will be described based on. The conductive metal piece 8 is fixed to the metal frame 1 by welding, so that a portion of the conductive portion 8a of the conductive metal piece 8 is not coated by a masking process at the time of painting. The short-circuit metal piece 9 has one end fixed to the mounting plate 11 together with the nameplate 10 by the screw 6, and the other end in contact with the conductive portion 8 a of the conductive metal piece 8 to be in an electrically conductive state. Further, since the nameplate 10 is electrically connected to an electronic circuit unit (not shown) via the mounting plate 11, the conductive metal piece 8, the short-circuiting metal piece 9, the nameplate 1
0, screw 6, and mounting plate 11, cover 100
And an electronic circuit section (not shown).

[0008]

SUMMARY OF THE INVENTION The glass holding structure of the cover 100 of the conventional electronic watt-hour meter, the cover 100
The structure for electrically connecting the electronic circuit unit and the electronic circuit unit and the method for electrostatically coating the cover unit 100 are as described above, and have the following problems. For example, the glass holding structure of the cover part 100 of the conventional example has two screw receiving metal pieces 4, two glass holding metal pieces 5, and four screws 6, and the number of parts and the number of assembling steps are large. . Further, with respect to the structure for electrically connecting the cover portion 100 and the electronic circuit portion, a masking process was required to prevent the conductive portion 8a of the conductive metal piece 8 from being coated at the time of coating. Regarding the electrostatic coating method of the cover part 100, since the coating is performed in a state where the cover part 100 is hooked on the hanging jig 13 of the coating jig 12, the cover part 100 swings and the coating quality is not stable. Was. Moreover, the metal piece 7 for coating was necessary only for hooking at the time of coating.

The present invention has been made to solve the above problems, and has as its object to reduce the number of parts and the number of assembly steps.

[0010]

According to a first aspect of the present invention, a cover portion is formed of an electric conductor, and fixes a frame covering an electronic circuit portion and a closing member mounted on an opening of the frame. A fixing member fixed to the frame is formed integrally with a second end formed of a first end and an electric conductor and electrically connected to the frame.

A cover according to a second aspect of the present invention is the cover according to the first aspect, wherein the second end is a charge supply part for supplying a charge to the frame when the frame is electrostatically coated. It is.

A cover part according to a third aspect of the present invention is the cover part according to the first aspect, wherein the fixing member is further integrally formed with a ground part for grounding the electronic circuit part.

The cover according to a fourth aspect of the present invention is the cover according to the first aspect, wherein a grounded portion of the electronic circuit portion and a gripped portion whose second end is gripped by a coating jig during electrostatic coating. Also, a charge is supplied from the coating jig to the cover through the second end during electrostatic coating.

The cover according to a fifth aspect of the present invention is a cover which is coated by electrostatic coating and covers the electronic circuit.
A frame body formed of an electric conductor and covering the electronic circuit portion; and a pinched portion formed of an electric conductor and electrically connected to the frame body and held by a coating jig of an electrostatic coating apparatus. During electrostatic coating, electric charge is supplied from the electrostatic coating apparatus to the frame through the held portion, and when the electronic circuit portion is stored in the frame, the electronic circuit portion is moved from the held portion to the electronic circuit portion. It is intended to take the ground.

According to a sixth aspect of the present invention, there is provided a method of manufacturing an electronic device.
A cover formed of an electric conductor and covering an electronic circuit portion, and a cover having a pinched portion formed of an electric conductor and electrically connected to the frame and held by a coating jig of an electrostatic coating apparatus. The manufacturing process of manufacturing the part, after the end of the manufacturing process, the sandwiched portion is sandwiched by a coating jig of an electrostatic coating device, and a charge is supplied from the coating jig to the cover portion, In order to ground the electronic circuit portion when the electronic circuit portion is housed in the frame after the electrostatic coating process of performing the electrostatic coating on the cover portion and after the electrostatic coating process, A ground connection step for connecting the electronic device and the holding portion is provided.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 In the present embodiment, portions denoted by the same reference numerals as those of the conventional example indicate the same or corresponding portions. FIG. 1 is a diagram showing a cover of an electronic watt-hour meter including an electronic circuit unit according to a first embodiment of the present invention, wherein (A) is a front view and (B) is a side sectional view. In the figure, reference numeral 21 denotes a metal frame which covers an electronic circuit portion and is made of a metal which is an electric conductor, for example, stainless steel.
The opening 2 at one end of the metal frame 21 is
A window glass 24 as a planar closing member adhered to the inner side of 1a is fixed by welding to two places of an upper central part and a lower central part of the opening 21a of the metal frame 21, and is fixed at the time of electrostatic coating. An electrostatic coating member for suspending the cover unit 101, the electrostatic coating member 24 is formed of a metal that is an electric conductor, for example, stainless steel, and 101 is a metal frame 21, a window glass 22, and an electrostatic coating member. It is a cover part composed of the painting member 24 and covering the electronic watt-hour meter.

FIG. 2 is a detailed view of the electrostatic coating member mounted on the cover according to the first embodiment of the present invention, wherein (A) is a front view, (B) is a side view, and (C) is a perspective view. FIG. 3D is a developed view. In the figure, reference numeral 24a denotes a base portion fixed to the cover portion 101, and 24b denotes a window glass 22 with an opening 21.
The glass holding portion 24c as a first end portion for holding the window glass 22 so as not to be displaced or detached when it is bonded to the second glass member 24a is connected to a coating jig serving as one electrode during electrostatic coating. 24d is a hanging hole for hooking the coating jig 12, and is electrically connected to the base 24a.

The electrostatic coating member 24 can be integrally formed as follows. First, a metal plate, for example, a stainless steel plate is cut out according to the shape shown by the solid line in FIG. Next, it can be integrally formed by bending the portion shown by the broken line. In the present embodiment, the electrostatic coating member 24 is integrally formed from a single cut-out metal plate, but each part is cut out, and the bent portion in the present embodiment is connected by welding, solder or adhesive. It may be integrally formed. In the present embodiment, since the base portion 24a and the suspension hole 24d only need to be electrically connected, the glass pressing portion 24b does not need to be formed of metal.

Next, based on FIGS. 1, 2 and 21, the cover 1 is formed by welding the electrostatic coating member 24 to the metal frame 21.
A method of applying electrostatic coating to the surface No. 01 will be described. A hanging hole 24d of a conducting portion 24c of an electrostatic coating member 24 is hooked on a hanging jig 13 of a coating jig 12 similar to a conventional coating device as shown in FIG. 21 and set in a coating device (not shown). . In general, when performing electrostatic coating, the same charge is applied to the paint (not shown) to be applied, while the object to be coated, in this embodiment, the cover 101 is grounded, and the paint and the cover 101 are grounded.
This is a method of performing painting by using electrostatic attraction between the two.
That is, in the present embodiment, the coating jig 12 and the cover 10
1 is electrically connected and uses the electrostatic coating member as a ground for electrostatic coating. In the present embodiment, the case where the coating jig 12 is used as the ground has been described. However, even if the opposite charge to the paint to be applied is supplied and charged to perform electrostatic coating, painting can be similarly performed. is there.

Next, a method of attaching the window glass 22 will be described with reference to FIGS. 1, 2 and 3. FIG. 3 is a diagram illustrating a state in which the electrostatic painting member mounted on the cover according to the first embodiment of the present invention is used. First, an adhesive is applied to the bonding portion 23, and the flat window glass 22 is placed on the metal frame 2
1 and then the glass holding portion 24b is attached to the window glass 2
Bend in the direction to hold 2. That is, after bonding the window glass 22 to the opening 21a with an adhesive, the glass pressing portion 24b is bent as shown in FIG. 2B. As a result, the bonding portion 2
Until the third adhesive dries, the window glass 22 is pressed against the opening 21 a of the metal frame 21.

According to the structure of the first embodiment, by providing the electrostatic painting member 24 in which the glass holding portion 24b and the conducting portion 24c for electrostatic painting are integrally formed, the screw like the conventional example is provided. The receiving metal piece 4, the glass holding metal piece 5, and the screw 6 become unnecessary, and the number of parts and the number of assembly steps can be reduced.

The case where only one electrostatic coating member is used in the present embodiment will be described with reference to FIG. FIG. 4 is a diagram in which only one electrostatic coating member is used in the first embodiment of the present invention, (A) is a front view,
(B) is an enlarged cross-sectional view in which a part of the cross section of (A) is enlarged. In the drawing, reference numeral 25 denotes a glass hook which presses the window glass 22 similarly to the glass presser 24b. But,
Although the window glass 22 is attached and bent and then held down like the glass holding portion 24b, the glass hooking portion 25 is formed in advance with a portion where the window glass 22 is held down.

Next, the electrostatic coating and the mounting of the window glass 22 will be described. First, one of the two electrostatic coating members 24 used in the present embodiment is replaced with a glass hook 25. Next, a method of applying the electrostatic coating will be described. This is exactly the same as the above-described embodiment, and the coating is performed using the electrostatic coating member 24 attached to the metal frame 21. Next, the window glass 22
The method of mounting the horn will be described. Only the method of attaching the window glass 22 differs from the above-described embodiment. When attaching the window glass 22, as shown in FIG. 4B, the window glass 22 is attached so as to be sandwiched between the glass hooking portion 25 and the opening 21a, and then the glass pressing portion 24b of the electrostatic coating member 24 is attached. Bend. Since the glass hooking portion 25 functions similarly to the glass pressing portion 24b, the window glass 22 can be fixed to the opening 21a by the glass hooking portion 25 and the bent glass pressing portion 24b.

In the present embodiment, the case where the electrostatic coating member 24 is mounted at two locations has been described. However, the same effect can be obtained even at a plurality of locations. Also, in this embodiment, the mounting locations are also provided at the upper central portion and the lower central portion of the opening 21a of the metal frame 21, but if both the purposes of electrostatic painting and fixing the window glass can be achieved. The mounting location is particularly the opening 2 of the metal frame 21.
It does not have to be the upper central part and lower central part of 1a. Similarly, the attachment position of the glass hooking portion 25 is not limited to the central portion.

In this embodiment, the metal frame 2
1. Although it has been described that the electrostatic coating member 24 is made of stainless steel, it is not particularly limited to stainless steel, and any other metal that is an electric conductor, such as a galvanized steel sheet, poses a particular problem. However, it is more preferable that the metal is not easily rusted. Further, the electrostatic coating is not limited to metals, since it can be made of a substance having electrical conductivity, for example, a conductive polymer. Further, if a frame is formed by applying an electrically conductive resin to the surface of a substance having no electrical conductivity and imparting electrical conductivity to the surface, the frame can be used in the present embodiment.

Although glass is used as the closing member in the present embodiment, the material is not particularly limited to glass, and may be plastic, for example.

Embodiment 2 FIG. In the present embodiment, portions denoted by the same reference numerals as those in the first embodiment indicate the same or corresponding portions. This embodiment is different from the first embodiment only in the configuration of the electrostatic painting member 24, and only this point will be described. FIG. 5 is a cover part of an electronic watt-hour meter including an electronic circuit part according to a second embodiment of the present invention, where (A) is a front view, (B) is a side sectional view, and FIG. It is an electrostatic painting member of Embodiment 2 of this invention, (A) is a front view,
(B) is a side view, (C) is a perspective view, and (D) is a developed view. In the figure, reference numeral 24e denotes a ground portion formed to protrude downward from the base portion 24a of the electrostatic coating member 24,
The ground surface 24f is a surface that has been subjected to a masking process at the time of electrostatic coating, has not been coated, and has an exposed metal surface.

Next, the integral formation of the electrostatic coating member 24 will be described with reference to FIGS. The forming method is as described in Embodiment Mode 1. A metal plate is cut out in the shape of FIG. The formed electrostatic coating member 24 is as shown in FIG. The electrostatic coating method and the method of attaching the window glass are the same as those in the first embodiment.

Next, a method of storing an electronic circuit (not shown) in the metal frame 21 after the electrostatic coating will be described. During storage, the ground of the electronic circuit unit (not shown) is taken from the ground surface 24f of the ground unit 24e. The connection between the electronic circuit section and the ground plane 24f is shown in FIG.
Is the same as

According to the configuration of the second embodiment, a glass pressing portion 24b, a conductive portion 24c for electrostatic coating, an electronic circuit portion forming a cover portion 101 and an element portion of a meter are provided on the electrostatic coating member 24. Embodiment 1 is provided by integrally forming an earth portion 24e for electrically connecting the ground portion (not shown) to the first embodiment.
Similarly to the above, the number of parts and the number of assembling steps can be reduced, and the ground plane 24f can be electrically connected to the electronic circuit section via a mounting plate (not shown) to release static electricity. In addition, the antistatic performance of the electronic wattmeter can be improved.

Embodiment 3 In the present embodiment, the portions denoted by the same reference numerals as those in Embodiment 1 indicate the same or corresponding portions. A method of integrally forming the electrostatic painting member 34 and a method of attaching the electrostatic painting member 34 to the metal frame 21 will be described with reference to FIGS. 7A and 7B are diagrams of a cover of an electronic watt-hour meter including an electronic circuit unit according to Embodiment 3 of the present invention, wherein FIG. 7A is a front view, FIG. FIG. 5A is a diagram showing an electrostatic painting member mounted on a metal frame according to Embodiment 3 of the present invention, wherein FIG. 5A is a front view and FIG. 5B is a side view. In the figure, reference numeral 34 denotes a base portion 34a fixed to the metal frame 21 and a window glass 22.
And a glass pressing portion 34b as a first end portion for holding down so as not to be displaced or detached, and a first electrode which is electrically connected to the metal frame 21 and becomes one of the electrodes during electrostatic coating and is connected to a coating jig. This is an electrostatic coating member integrally formed with the conductive portion 34c as an end of the second member, and is formed of a metal as an electric conductor, for example, a stainless steel material.

The conducting portion 34c of the electrostatic painting member 34 is sandwiched by a sandwiching portion 36a of a coating jig 35 described later and serves as a sandwiched portion, and therefore has the hanging hole 24d shown in the first embodiment. do not do. Also, the electrostatic coating member 3
The conductive portion 34c of No. 4 has a plate thickness T.
The method of integrally forming the electrostatic coating member 34 is based on the suspension hole 2.
Except for forming 4d, it is completely the same as the method of integrally forming the electrostatic coating member 24 described in the first embodiment. The electrostatic coating member 34 formed in this manner is fixed to the upper central portion and the lower central portion of the opening 21a of the metal frame 21 as shown in FIG. 7, and will be described in the first embodiment. The window glass 22 is attached to the metal frame 21 as described above. Thus, the cover unit 101 is manufactured.

Next, based on FIG. 9 and FIG.
The method of electrostatic coating No. 01 will be described. This electrostatic coating process is performed after the above-described manufacturing process of the cover unit 101 is completed. The method of electrostatic coating is the same as that described in the first embodiment, except for the method of attaching the cover 101 to the coating jig 12. Therefore, only the mounting method will be described.
FIG. 9 is a side sectional view showing a state in which the cover part according to the third embodiment of the present invention is mounted on a coating jig, and FIG. 10 shows a holding part of a hanging jig according to the third embodiment of the present invention. It is an expansion perspective view. In the drawing, reference numeral 35 denotes a coating jig to be mounted on an electrostatic coating device (not shown), and 36 denotes a hanging jig having a holding portion 36a for holding the conducting portion 34c of the electrostatic coating member 34 during electrostatic coating. The holding portion 36a has a U-shape. The hanging jig 36 is formed of a metal that is an electric conductor, for example, stainless steel. Further, the width of the U-shaped portion of the holding portion 36a at the tip of the hanging jig 36 is formed with a dimension of L, and is formed slightly smaller than the plate thickness T of the conducting portion 34c of the electrostatic painting member 34. But
It has elasticity.

In the present embodiment, a holding portion 36a is provided at the tip of the coating jig 35, and the holding portion 36a is located at the leading end of the electrostatic coating member 34 of the cover portion 101.
By holding the cover 10 as shown in FIG.
1 is fixed to the painting jig 35. Thereafter, the electrostatic coating described in the first embodiment is performed. In this manner, when the electrostatic coating is performed while the conductive portion 34c is held, the holding by the holding portion 36a is the same as that performed by the masking process. As a result, the conductive portion 34c is not coated and the metal surface is not coated. Is exposed. As described above, the dimension L of the U-shaped portion of the holding portion 36a is formed to be slightly smaller than the plate thickness T of the conducting portion 34c of the electrostatic painting member 34 shown in FIG. 8, and has elasticity. As a result, the holding portion 36a can securely hold the conducting portion 34c.

Next, a method of housing the electronic circuit portion of the present embodiment in the cover portion and connecting the electronic circuit portion and the cover portion to the ground will be described with reference to FIG. This ground connection step is performed after the end of the above-mentioned electrostatic coating step.
FIG. 11 is a main part side view showing a state in which the electrostatic coating member, the short-circuit metal piece, and the electronic circuit according to Embodiment 3 of the present invention are electrically connected. In the drawing, reference numeral 37 denotes a metal piece for short-circuiting an electronic circuit portion for electrically connecting an electronic circuit portion (not shown) and the cover portion 101 via an electronic circuit portion base 38; Reference numeral denotes an electronic circuit section fixing screw for fixing the electronic circuit section short-circuiting metal piece 37 and the electronic circuit section base 38. The electronic circuit unit is mounted on a base for the electronic circuit unit.

First, a metal piece 37 for short-circuiting an electronic circuit section is screwed onto an electronic circuit section base 38 on which the electronic circuit section is mounted.
Fix with. Next, the metal piece 37 for short-circuiting the electronic circuit portion is sandwiched between the conductive portions 34c of the electrostatic painting member 34 to be electrically connected. The conductive portion 34 is a portion that has not been coated by masking the holding portion 36a in the above-described electrostatic coating process. By assembling in this manner, the electronic circuit portion can be electrically connected to the metal frame 21 via the electronic circuit portion base 38, the electronic circuit portion short-circuiting metal piece 37, and the conductive portion 34c of the electrostatic painting member 34. It can be used as a ground for the circuit section. In the present embodiment, the electronic circuit portion base 38 and the electronic circuit portion short-circuiting metal piece 37 are used.
Is screwed by the electronic circuit part fixing screw 39, but may be connected by welding or soldering. Note that the metal piece 37 for short-circuiting the electronic circuit part is the electrostatic coating member 3.
4, the metal piece 37 for short-circuiting the electronic circuit portion is held.
Are connected to the electrostatic coating member 34, but may be connected by welding or soldering.

According to the configuration of the third embodiment, as shown in FIG. 9, the conductive portion 34c of the electrostatic coating member 34 is sandwiched between the holding portions 36a of the coating jig 35, so that the conductive portion 34c is coated. Since it does not adhere, masking processing is not required. Further, the coating can be performed stably without shaking of the cover portion 101 at the time of coating, and a uniform coating film and good coating quality can be obtained. In addition, when performing a visual inspection from the outside of the metal frame body 21 (in the direction of the arrow in FIG. 21) to visually check whether the conductive portion 34c of the electrostatic coating member 34 is not coated and the metal surface is exposed, In this case, the ground surface 24f was designed to be in close contact with the opening 21a of the metal frame 21, so that it was very difficult to see. However, according to the configuration of the third embodiment, since the conducting portion 34c of the electrostatic painting member 34 is located at a position far from the opening 21a of the metal frame 21, that is, closer to the inspection position, visual inspection is easy. Becomes

Embodiment 4 FIG. In the present embodiment, the same reference numerals as those in the third embodiment denote the same or corresponding parts. In this embodiment, the same processes as those of the manufacturing process, the electrostatic coating process, and the ground connection process described in the third embodiment are performed. However, only the structure of the electrostatic coating member 34, the method of attaching the cover 101 to the hanging jig 36 in the electrostatic coating process, and the method of connecting the electronic circuit unit and the cover 101 differ from the third embodiment. Only the points that have been described will be described. Based on FIG. 12 and FIG.
Forming method and metal frame 21 of electrostatic coating member 44
The method of attaching the cable to the device will be described. FIG. 12 is a cover part of an electronic watt-hour meter including an electronic circuit part according to Embodiment 4 of the present invention, where (A) is a front view, (B) is a side sectional view, and FIG. 4A and 4B show an electrostatic coating member 44 according to Embodiment 4 of the present invention, wherein FIG. 4A is a front view, FIG. 4B is a side view, FIG. 4C is a bottom view, and FIG. In the figure, reference numeral 44 denotes a base portion 44 fixed to the metal frame 21.
a, and a glass pressing portion 44b as a first end portion for pressing the window glass 22 so as not to shift or come off,
A conductive portion 44c as a second end which becomes an electrode during electrostatic coating and is connected to the coating jig, and a stopper portion 44d formed by bending the leading end of the conductive portion 44c into an L-shape.
This is an electrostatic coating member integrally formed from the above, and is formed of a metal which is an electric conductor, for example, a stainless steel material. The method of integrally forming the electrostatic coating member 44 is exactly the same as the method of integrally forming the electrostatic coating member 34 described in the third embodiment except that the stopper 44d is formed. The thus formed electrostatic coating member 44 is fixed by welding to two places, that is, the upper central part and the lower central part of the opening 21a of the metal frame 21, as shown in FIG.
The method of attaching the window glass 22 is the same as in the third embodiment.

Next, a method of electrostatically coating the cover 101 will be described with reference to FIGS. This electrostatic coating process is performed after the end of the above-described manufacturing process. The method of electrostatic coating is the same as that described in the third embodiment, except for the method of attaching the cover 101 to the coating jig 35. Therefore, only the mounting method will be described. FIG.
4 is a side sectional view showing a state in which the cover is attached to a coating jig, FIG. 15 is a perspective view showing a holding portion of the coating jig, and FIG.
FIG. 3A is a diagram showing a state in which an electrostatic coating member of a cover is hooked on a holding portion of a coating jig, FIG. 3A is a plan view, and FIG. 3B is a front view. In the figure, reference numeral 36 denotes a holding portion 36a for holding the conducting portion 34c of the electrostatic coating member 34 during electrostatic coating,
This is a hanging jig having a groove 36b formed in a holding portion 36a of a hanging jig 36 of a coating jig 35. The dimensions of the U-shaped portion and the material of the hanging jig 36 are the same as those of the hanging jig 36 described in the third embodiment. In the present embodiment, when attaching the cover 101 to the coating jig 35,
The fixing of the conductive portion 44c by sandwiching it with a is exactly the same as in the third embodiment. However, the difference is that the holding is performed so that the groove 36b and the stopper 44d are fitted when the holding is performed.

As described above, the cover 10 is attached to the coating jig 35.
After the mounting, the electrostatic coating described in the third embodiment is performed. After the painting, it goes without saying that the conducting portion 44c is not painted and the metal is exposed. The electrostatic coating method and the method of attaching the window glass are the same as those in the first embodiment.

Next, a method for accommodating the electronic circuit section of the present embodiment in the cover section and connecting the electronic circuit section and the cover section to the ground will be described with reference to FIG. This ground connection step is performed after the end of the above-mentioned electrostatic coating step.
FIG. 17 is a view showing a state in which the electrostatic coating member 44, the metal piece 37 for short-circuit, and the base 38 for the electronic circuit portion are electrically connected. In the figure, reference numeral 37 denotes a metal piece for short-circuiting the electronic circuit part in the third embodiment, which has a bulge at the tip as shown in the figure.

The electronic circuit base 38 and the metal frame 21
Are electrically connected to each other, and the metal frame 21 is used as the ground for the electronic circuit section, as described in the third embodiment. The metal piece 37 for short-circuiting the electronic circuit section and the conductive section 44 c of the electrostatic coating member 44 are used. Only the form of connection to the Only this point will be described. As described above, the stopper 44d is provided at the tip of the electrostatic coating member 44, and the metal piece 3 for short-circuiting the electronic circuit portion is engaged with the stopper 44d.
A swelling is formed at the tip of 7. Therefore, when the metal piece 37 for short-circuiting the electronic circuit portion and the electrostatic painting member 44 are connected, the stopper portion 44d is connected to the metal piece 3 for short-circuiting the electronic circuit portion.
7 is difficult to be disengaged by engaging with the front end of the base 7.
The electronic circuit unit and the cover unit 101 are electrically connected,
The method of grounding the electronic circuit is exactly the same as that described in the third embodiment.

According to the structure of the fourth embodiment, the stopper 44d is provided on the electrostatic coating member 44, so that the stopper 44d and the groove 36b are fitted to each other. When cleaning, the cover 101 moves due to water pressure or the like, and the electrostatic coating member 44 and the coating jig 3
5 can be prevented from changing, and the quality at the time of painting can be further stabilized. Further, the conducting portion 44c of the electrostatic coating member 44 is
Of the conductive portion 34c.
It is not necessary to perform a masking process for not coating the portion, and it is possible to further stabilize the quality at the time of coating the cover portion.

[0044]

Since the present invention is configured as described above, it has the following effects.

The cover part according to the first invention is formed of an electric conductor, and covers a frame covering the electronic circuit part, a first end for fixing a closing member mounted on the opening of the frame, and Since the second end portion formed of an electric conductor and electrically connected to the frame body is integrally formed and provided with a fixing member fixed to the frame body, the number of parts and the number of assembly steps are reduced. be able to.

In the cover part according to the second invention, in the first invention, the second end is a charge supply part for supplying a charge to the frame when the frame is electrostatically coated. Further, the number of parts and the number of assembling steps can be reduced.

According to the third aspect of the present invention, in the cover according to the first aspect, since the fixing member is formed integrally with a ground portion for grounding the electronic circuit portion, the number of parts and the number of assembly steps are reduced. Can be reduced.

According to a fourth aspect of the present invention, in the first aspect of the present invention, in the first aspect of the present invention, the cover has a second end grounded by the coating jig and a ground of the electronic circuit portion during electrostatic coating. Since the electric charge is supplied from the jig for painting to the cover through the second end during electrostatic coating, the number of parts can be reduced, and masking of the earth is performed. Processing becomes unnecessary, and the number of assembly steps can be reduced.

The cover according to a fifth aspect of the present invention is a cover which is coated by electrostatic coating and covers the electronic circuit.
A frame body formed of an electric conductor and covering the electronic circuit portion; and a pinched portion formed of an electric conductor and electrically connected to the frame body and held by a coating jig of an electrostatic coating apparatus. During electrostatic coating, electric charge is supplied from the electrostatic coating apparatus to the frame through the held portion, and when the electronic circuit portion is stored in the frame, the electronic circuit portion is moved from the held portion to the electronic circuit portion. Since the grounding is used, the number of parts can be reduced, and the masking process of the grounding part is not required, so that the number of assembling steps can be reduced.

According to a sixth aspect of the invention, there is provided a method of manufacturing an electronic device, comprising:
It has a frame formed of an electric conductor and covering the electronic circuit portion, and a pinched portion formed of an electric conductor and electrically connected to the frame and held by a coating jig of an electrostatic coating apparatus. The manufacturing process of manufacturing the cover portion, after the end of the manufacturing process, the sandwiched portion is sandwiched by a coating jig of an electrostatic coating device, and a charge is supplied from the coating jig to the cover portion. An electrostatic coating step of performing the electrostatic coating on the cover portion, and after the end of the electrostatic coating process, to ground the electronic circuit portion when storing the electronic circuit portion in the frame, Since a ground connection step for connecting the electronic device and the holding portion is provided, the number of parts can be reduced, and a masking process for the ground portion is not required, so that the number of assembly steps can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a cover of an electronic watt-hour meter according to a first embodiment of the present invention, where (A) is a front view and (B)
Is a side sectional view.

FIG. 2 is a detailed view of an electrostatic painting member mounted on a cover according to the first embodiment of the present invention, wherein (A) is a front view,
(B) is a side view, (C) is a perspective view, and (D) is a developed view.

FIG. 3 is a diagram using an electrostatic painting member mounted on a cover according to the first embodiment of the present invention.

FIG. 4 is a diagram in which only one electrostatic coating member is used in Embodiment 1 of the present invention, (A) is a front view,
(B) is an enlarged sectional view.

FIG. 5 is an electrostatic coating member according to Embodiment 2 of the present invention, wherein (A) is a front view, (B) is a side view, (C) is a perspective view, and (D) is a developed view.

FIG. 6 is an electrostatic coating member according to Embodiment 2 of the present invention, wherein (A) is a front view, (B) is a side view, (C) is a perspective view, and (D) is a developed view.

FIG. 7 is a diagram showing a cover of an electronic watt-hour meter showing a third embodiment of the present invention, wherein (A) is a front view and (B)
Is a side sectional view.

FIG. 8 is a view showing an electrostatic painting member mounted on a cover according to Embodiment 3 of the present invention, wherein (A) is a front view,
(B) is a side view.

FIG. 9 is a side sectional view showing a state where the cover according to Embodiment 3 of the present invention is mounted on a coating jig.

FIG. 10 is an enlarged perspective view showing a holding portion of a hanging jig according to Embodiment 3 of the present invention.

FIG. 11 is a main part side view showing a state where an electrostatic coating member, a short-circuit metal piece, and an electronic circuit according to Embodiment 3 of the present invention are electrically conducted.

12A and 12B show a cover of an electronic watt-hour meter showing Embodiment 4 of the present invention, wherein FIG. 12A is a front view and FIG. 12B is a side sectional view.

13A and 13B show an electrostatic painting member according to Embodiment 4 of the present invention, wherein FIG. 13A is a front view, FIG. 13B is a side view, and FIG.
Is a bottom view and (D) is a perspective view.

FIG. 14 is a side sectional view showing a state in which a cover part according to Embodiment 4 of the present invention is mounted on a coating jig.

FIG. 15 is a perspective view showing a holding portion of a coating jig according to Embodiment 4 of the present invention.

16A and 16B are diagrams showing a state where an electrostatic coating member of a cover is hooked on a holding portion of a coating jig according to Embodiment 4 of the present invention, wherein FIG. 16A is a plan view and FIG. is there.

FIG. 17 shows a state in which the electrostatic coating member, the short-circuiting metal piece, and the electronic circuit portion according to Embodiment 4 of the present invention are electrically connected.

FIG. 18 is a view showing a cover of a conventional electronic watt-hour meter, where (A) is a front view and (B) is a side sectional view.

FIG. 19 is a side sectional view showing a cover of another conventional electronic watt-hour meter, which is provided with a countermeasure against static electricity.

20A and 20B are diagrams showing conductive metal pieces of the cover shown in FIG. 19, wherein FIG. 20A is a plan view and FIG. 20B is a front view.

FIG. 21 is a side sectional view showing a state where a conventional cover portion is hung on a coating jig.

[Explanation of symbols]

1 metal frame, 2 window glass, 3 bonded parts, 4 screw receiving metal pieces, 5 glass holding metal pieces, 6 screws, 7
Metal piece for painting, 7a Hanging hole, 8 Conductive metal piece, 8a
Conducting part, 9 Short-circuit metal piece, 10 Name plate, 11 Mounting plate, 12 Painting jig, 100 Cover part, 101 Cover part, 13 Hanging jig, 21 Metal frame, 21a
Opening, 22 Window glass, 23 Adhesive part, 24 Electrostatic coating member, 24a Base part, 24b Glass holding part, 2
4c conducting part, 24d hanging hole, 24e grounding part,
24f ground plane, 25 glass hooking part 34 electrostatic coating member, 34a base part, 34b glass holding part,
34c conducting part, 35 painting jig, 36 hanging jig,
36a clamping portion, 36b groove portion, 37 metal piece for short circuit of electronic circuit portion, 38 base for electronic circuit portion, 39 screw for fixing electronic circuit portion, 44 electrostatic painting member, 44a base portion,
44b Glass holding part, 44c conduction part, 44d stopper part.

Claims (6)

[Claims] 1. A frame formed of an electric conductor and covering an electronic circuit portion, a first end for fixing a closing member attached to an opening of the frame, and an electric conductor, A second end electrically connected to the frame, the cover being integrally formed, and a fixing member fixed to the frame; 2. The cover unit according to claim 1, wherein the second end is a charge supply unit that supplies electric charges to the frame when the frame is electrostatically coated. 3. The cover part according to claim 1, wherein the fixing member is further formed integrally with a ground part for grounding the electronic circuit part. 4. The second end portion serves as both a clamped portion to be clamped by a coating jig during electrostatic painting and a ground portion for grounding the electronic circuit portion. The cover section according to claim 1, wherein electric charges are supplied from the coating jig to the cover section through the second end portion at the time of painting. 5. A cover, which is coated by electrostatic coating and covers an electronic circuit portion, wherein the cover is formed of an electric conductor and covers the electronic circuit portion, and a cover formed of an electric conductor and electrically connected to the frame. And a clamped portion that is clamped by a coating jig of an electrostatic coating device, and during electrostatic painting, charge is supplied from the electrostatic coating device to the frame through the clamped portion, A cover part, wherein when the electronic circuit part is stored in the frame, the electronic circuit part is grounded from the held part. 6. A frame formed of an electric conductor and covering an electronic circuit portion, and a cover formed of an electric conductor and electrically connected to the frame and held by a coating jig of an electrostatic coating apparatus. A manufacturing process for manufacturing a cover portion having a holding portion, and after the completion of the manufacturing process, the held portion is held by a coating jig of an electrostatic coating device, and the coating jig is applied to the cover portion from the coating jig. After the electrostatic coating process, the electronic circuit unit is grounded when the electronic circuit unit is housed in the frame after the electrostatic coating process. And a ground connection step of connecting the electronic device and the holding portion to perform the electronic device manufacturing process.