JP6023454B2 - Electricity meter - Google Patents

Description

  The present invention relates to a watt hour meter that measures the amount of power, and more particularly to a waterproof structure thereof.

  2. Description of the Related Art Conventionally, as a waterproof structure of a watt hour meter, a structure in which waterproof performance is ensured by sandwiching a packing between a cover and a base member and fixing with a few screws. Further, Patent Document 1 discloses a vertical waterproof case such as a watt hour meter that can improve the assembling property without using a sealing material and can ensure a stable sealing performance for a long period of time.

JP 2000-232275 A

  However, the waterproof structure of the watt-hour meter using packing requires the packing to be attached, leading to an increase in the number of parts, an increase in assembly work time, and an increase in product disposal costs. It has become.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a watt-hour meter having a waterproof structure with a packingless structure.

In order to solve the above problems, an watt-hour meter according to the present invention is a member provided with a recess formed of a groove formed to be continuous on the upper side surface, the left side surface, and the right side surface. A base member having a front surface tapered so that the width is shorter than the width of the upper side surface of the member and the width of the lower side surface is the same as the width of the lower side surface of the member, and mounted on the front surface of the base member A weighing unit, an upper side panel, a left side panel, and a right side panel, the lower side surface is opened, and the upper side surface of the base member on which the weighing unit is mounted and the inner wall of the upper side panel, the base member And a cover attached so that a right side surface of the base member and an inner wall of the right side panel are in contact with each other , and the upper side panel side has a certain height. Have The left side panel and the side of the right side panel are gradually lowered from the fixed height, and a tapered convex portion is formed on the lower side so as to be the same height as the inner wall of the cover, and is attached to the base member. In this case, the concave portion formed in the base member is fitted with the convex portion formed in the cover .

  According to the watt-hour meter according to the present invention, the water that has entered from the gap between the cover and the base member flows through the recesses formed on the upper side surface, the left side surface, and the right side surface, and is drained from the lower side. Can be secured. As a result, there is no need for packing, and it is possible to provide a watt-hour meter having a waterproof structure in which packing is eliminated.

It is an external appearance perspective view which decomposes | disassembles and shows the structure of the watt-hour meter which concerns on Example 1 of this invention. It is an external appearance perspective view which decomposes | disassembles and shows the structure of the watt-hour meter which concerns on Example 2 of this invention. It is an external appearance perspective view which decomposes | disassembles and shows the structure of the watt-hour meter which concerns on Example 3 of this invention. It is an external appearance perspective view which decomposes | disassembles and shows the structure of the watt-hour meter which concerns on Example 4 of this invention. It is a cutaway partly showing the state where the convex part of the cover of the electricity meter concerning Example 4 of the present invention was settled in the concave part of the base member. It is an external appearance perspective view which decomposes | disassembles and shows the structure of the watt-hour meter which concerns on Example 5 of this invention. It is an external appearance perspective view which decomposes | disassembles and shows the structure of the watt-hour meter which concerns on Example 6 of this invention. It is an external appearance perspective view which decomposes | disassembles and shows the structure of the watt-hour meter which concerns on Example 7 of this invention. It is an external appearance perspective view which decomposes | disassembles and shows the structure of the watt-hour meter which concerns on Example 8 of this invention. It is an external appearance perspective view which decomposes | disassembles and shows the structure of the watt-hour meter which concerns on Example 9 of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following, the same or corresponding components will be described with the same reference numerals.

  1 is an exploded perspective view showing the structure of a watt-hour meter according to Embodiment 1 of the present invention. FIG. 1 (a) is an oblique view from above and FIG. 1 (b) is an oblique view from below. FIG.

  This watt-hour meter includes a base member 1 a, a metering unit 2, and a cover 3. The base member 1a is attached so that the back surface thereof is in contact with a wall or the like, and the weighing unit 2 is mounted on the front surface 11a1. The upper side surface 11b1, the left side surface 11c1, and the right side surface 11d1 of the base member 1a are provided with a recess 12a formed of a groove formed so as to be continuous on these three surfaces.

  The measuring unit 2 includes mechanical parts for measuring the amount of electric power, a circuit board, and the like, and is mounted on the front surface 11a1 of the base member 1a as described above.

  The cover 3 is formed so as to cover the entire base member 1a on which the measuring unit 2 is mounted. The cover 3 includes a front panel 31a, an upper side panel 31b, a left side panel 31c, and a right side panel 31d, and is formed in a box shape having an open lower side. In the central portion of the front panel 31a, a recess 32 is formed in which the measuring unit 2 is accommodated without contacting. A cable (not shown) is drawn from a plurality of terminal fittings provided on the base member 1a from the opened lower surface.

  The cover 3 is pressed in the direction of the base member 1a (in the direction of arrow A in the figure), and the inner walls of the upper side surface 11b1 and the upper side panel 31b of the base member 1a, the inner walls of the left side surface 11c1 and the left side panel 31c of the base member 1a, and The right side surface 11d1 of the base member 1a and the inner wall of the right side panel 31d are attached so as to contact each other.

  The assembly of the watt hour meter is completed simply by pressing the cover 3 against the base member 1a. Upon completion of this assembly, the side surface of the base member 1a and the inner wall of the cover 3 come into contact with each other, and the base member 1a and the cover 3 are sealed.

  In this sealed state, even if rainwater enters from the contact portion between the base member 1a and the cover 3 due to weather conditions such as heavy rain, the rainwater that has entered flows through the recess 12a provided on the side surface of the base member 1a. In addition, since it naturally falls from the open part below, it is possible to prevent water from entering the inside.

  The above structure eliminates the need for packing to prevent water intrusion from the outside, avoiding an increase in the number of parts, an increase in assembly work time, and an increase in product disposal costs, and an inexpensive watt-hour meter Can be produced. Further, since no sealing material is used, the quality is stable and the assemblability is improved. Further, it is not necessary to consider durability as in the case of using a rubber sealing material, and stable sealing performance can be obtained over a long period of time.

  As described above, according to the watt-hour meter according to the first embodiment of the present invention, it is possible to provide a watt-hour meter that is packingless and has a waterproof property.

  In the above-described first embodiment, the case where the present invention is applied to the watt hour meter has been described. However, the present invention can be applied to a meter other than the watt hour meter. The same applies to each embodiment described below.

  2 is an external perspective view showing an exploded structure of the watt-hour meter according to the second embodiment of the present invention. FIG. 2 (a) is an oblique view from above and FIG. 2 (b) is an oblique view from below. FIG.

  This watt-hour meter includes a base member 1b, a metering unit 2, and a cover 3. The base member 1b is attached so that the back surface thereof is in contact with a wall or the like, and the weighing unit 2 is mounted on the front surface 11a2. Further, the front surface 11a2 of the base member 1b is provided with a concave portion 12b formed of a groove formed so as to be continuous with a predetermined distance from each of the upper side surface 11b2, the left side surface 11c2 and the right side surface 11d2 of the base member 1b. ing.

  The measuring unit 2 is composed of a mechanical component for measuring the amount of electric power, a circuit board, and the like. As described above, the measuring unit 2 is mounted on the front surface 11a2 of the base member 1b and inside the region surrounded by the recess 12b.

  The cover 3 has the same structure as the watt hour meter according to the first embodiment described above, and is formed so as to cover the entire base member 1b on which the measuring unit 2 is mounted.

  The cover 3 is pressed in the direction of the base member 1b (in the direction of arrow A in the figure), and the inner wall of the upper side surface 11b2 and the upper side panel 31b of the base member 1b, the inner wall of the left side surface 11c2 and the left side panel 31c of the base member 1b, and The right side surface 11d2 of the base member 1b and the inner wall of the right side panel 31d are attached so as to contact each other.

  The assembly of the watt hour meter is completed simply by pressing the cover 3 against the base member 1b. Upon completion of this assembly, the side surface of the base member 1b and the inner wall of the cover 3 come into contact with each other, and the base member 1b and the cover 3 are sealed.

  In this sealed state, even if rainwater enters from the contact portion between the base member 1b and the cover 3 due to weather conditions such as heavy rain, the rainwater that has entered the recess 12b provided on the front surface 11a2 of the base member 1b. Since it flows and naturally falls from the open part below, water intrusion into the inside can be prevented.

  As described above, according to the watt-hour meter according to the second embodiment of the present invention, the same effect as the watt-hour meter according to the first embodiment described above can be obtained.

  3 is an external perspective view showing an exploded structure of a watt-hour meter according to Embodiment 3 of the present invention. FIG. 3 (a) is a diagram viewed from diagonally above, and FIG. 3 (b) is from diagonally below. FIG.

  This watt-hour meter includes a base member 1 c, a metering unit 2, and a cover 3. The base member 1c is attached so that the back surface thereof is in contact with a wall or the like, and the measuring unit 2 is mounted on the front surface 11a3. A groove formed on the upper side surface 11b1 of the base member 1c and a front surface 11a3 of the base member 1c so as to be continuous with the groove, are formed inside by a predetermined distance from the left side surface and inside by a predetermined distance from the right side surface. A recess 12b made of a groove is provided.

  The measuring unit 2 includes mechanical parts for measuring the amount of electric power, a circuit board, and the like. As described above, the measuring unit 2 is the front surface 11a3 of the base member 1c, and includes two grooves (recesses of the recess 12b) provided in the base member 1c. It is mounted between (some).

  The cover 3 has the same structure as the watt hour meter according to the first embodiment described above, and is formed so as to cover the entire base member 1c on which the measuring unit 2 is mounted.

  The cover 3 is pressed in the direction of the base member 1c (in the direction of arrow A in the figure), and the inner wall of the upper side surface 11b1 and the upper side panel 31b of the base member 1c, the inner wall of the left side surface 11c2 and the left side panel 31c of the base member 1c, and The right side surface 11d2 of the base member 1c and the inner wall of the right side panel 31d are attached so as to contact each other.

  The assembly of the watt hour meter is completed simply by pressing the cover 3 against the base member 1c. Upon completion of this assembly, the side surface of the base member 1c and the inner wall of the cover 3 come into contact with each other, and the base member 1c and the cover 3 are sealed.

  In this sealed state, for example, even if rainwater enters from the contact portion between the base member 1c and the cover 3 due to weather conditions such as heavy rain, the rainwater that has entered enters the left and right sides of the upper surface 11b1 and the front surface 11a3 of the base member 1c. Since it flows through the provided recessed part 12b and falls spontaneously from the open part below, water intrusion to the inside can be prevented.

  As described above, according to the watt-hour meter according to the third embodiment of the present invention, the same effect as the watt-hour meter according to the first embodiment described above can be obtained.

  The watt-hour meter according to the fourth embodiment of the present invention is a modification of the watt-hour meter according to the first embodiment. FIG. 4 is an external perspective view showing an exploded structure of the watt-hour meter according to the fourth embodiment. FIG. 4A is a diagram viewed from diagonally above, and FIG. 4B is a diagram viewed from diagonally below. It is.

  This watt-hour meter includes a base member 1d, a metering unit 2, and a cover 3. The base member 1d is attached such that its back surface is in contact with a wall or the like, and the measuring unit 2 is mounted on the front surface 11a4. The upper side surface 11b1, the left side surface 11c1, and the right side surface 11d1 of the base member 1d are provided with a recess 12c formed of a groove formed so as to be continuous on these three surfaces. Further, in the portion of the base member 1d closer to the front surface 11a4 than the recess 12c, the width of the upper side surface 11b1 is shorter than the original width of the base member 1d, and the width of the lower side surface is the same as the original width of the base member 1d. The taper is formed so that

  The measuring unit 2 is the same as that of the watt hour meter according to the first embodiment described above.

  The cover 3 has a structure in which convex portions 33a are provided in addition to the watt-hour meter according to the first embodiment. The upper surface panel 31b side of the convex portion 33a has a certain height, and the left side panel 31c side and the right side panel 31d side gradually become lower from the certain height, and the open lower surface A taper is formed so as to have the same height.

  The cover 3 is pressed in the direction of the base member 1d (in the direction of the arrow A in the figure) and aligned so that the convex portion 33a fits in the concave portion 12c of the base member 1d, and then from the upper direction to the downward direction (in the direction of the arrow B in the figure). ). As a result, as shown in the partial cutaway view of FIG. 5, the upper surface 11b1 of the base member 1d and the inner wall of the upper side panel 31b in a state where the convex portion 33a of the cover 3 is housed in the concave portion 12c of the base member 1. The left side surface 11c1 of the base member 1d and the inner wall of the left side panel 31c and the right side surface 11d1 of the base member 1d and the inner wall of the right side panel 31d are attached in contact with each other.

  The assembly of the watt hour meter is completed simply by pressing the cover 3 against the base member 1d and shifting it downward. Upon completion of this assembly, the side surface of the base member 1d and the inner wall of the cover 3 come into contact with each other, and the base member 1d and the cover 3 are sealed.

  In this sealed state, for example, even if rainwater enters from the contact portion between the base member 1d and the cover 3 due to weather conditions such as heavy rain, the rainwater that has entered flows through the recess 12c provided on the side surface of the base member 1d. And naturally falls from the lower opening. At this time, since the convex portion 33a of the cover 3 is received and sealed in the concave portion 12c of the base member 1d, it is possible to more reliably prevent water from entering the interior than the watt-hour meter according to the first embodiment. .

  As described above, according to the watt-hour meter according to the fourth embodiment of the present invention, the same effect as that of the watt-hour meter according to the first embodiment described above can be obtained.

  The watt hour meter according to the fourth embodiment of the present invention is a modification of the watt hour meter according to the first embodiment. However, the watt hour meter according to the third embodiment is modified in the same manner as the fourth embodiment. A watt hour meter can also be made.

  The watt-hour meter according to the fifth embodiment of the present invention is a modification of the watt-hour meter according to the second embodiment. 6 is an exploded perspective view showing the structure of the watt-hour meter according to the fifth embodiment. FIG. 6 (a) is a diagram viewed from diagonally above, and FIG. 6 (b) is a diagram viewed from diagonally below. It is.

  This watt-hour meter includes a base member 1e, a metering unit 2, and a cover 3. The base member 1e is attached so that the back surface thereof is in contact with a wall or the like, and the measuring unit 2 is mounted on the front surface 11a2. The structure of the base member 1e is the same as that of the watt-hour meter according to the second embodiment.

  The measuring unit 2 is the same as that of the watt hour meter according to the first embodiment described above.

  The cover 3 has a structure in which a convex portion 33b is provided on the watt-hour meter according to the first embodiment. The convex portion 33b is formed to have a certain distance from the inner walls of the upper side panel 31b, the left side panel 31c, and the right side panel 31d.

  This cover 3 is pressed in the direction of the base member 1e (in the direction of arrow A in the figure) after being aligned so that the convex portion 33b fits in the concave portion 12b of the base member 1e. Thereby, in a state where the convex portion 33b of the cover 3 is housed in the concave portion 12b of the base member 1e, the upper side surface 11b2 of the base member 1e and the inner wall of the upper side panel 31b, the left side surface 11c2 of the base member 1e, and the left side panel 31c The inner wall and the right side surface 11d2 of the base member 1e and the inner wall of the right side panel 31d are attached so as to contact each other.

  The assembly of the watt hour meter is completed simply by pressing the cover 3 against the base member 1e. Upon completion of this assembly, the side surface of the base member 1e and the inner wall of the cover 3 come into contact with each other, and the convex portion 33b of the cover 3 is received in the concave portion 12b of the base member 1e, so that the base member 1e and the cover 3 are sealed. It becomes a state.

  In this sealed state, for example, even if rainwater enters from the contact portion between the base member 1e and the cover 3 due to weather conditions such as heavy rain, the rainwater that has entered the recess 12b provided on the front surface 11a2 of the base member 1e. It flows and falls naturally from the open part below. At this time, since the convex portion 33b of the cover 3 is received and sealed in the concave portion 12b of the base member 1e, it is possible to more reliably prevent water from entering the interior than the watt-hour meter according to the second embodiment. .

  As described above, according to the watt-hour meter according to the fifth embodiment of the present invention, the same effect as the watt-hour meter according to the first embodiment described above can be obtained.

  The watt-hour meter according to the fifth embodiment of the present invention is a modification of the watt-hour meter according to the second embodiment. However, the watt-hour meter according to the third embodiment is modified similarly to the fifth embodiment. A watt hour meter can also be made.

  The watt-hour meter according to the sixth embodiment of the present invention is a modification of the watt-hour meter according to the fourth embodiment. FIG. 7 is an exploded perspective view showing the structure of the watt-hour meter according to the sixth embodiment. FIG. 7A is a diagram viewed from diagonally above, and FIG. 7B is a diagram viewed from diagonally below. It is.

  This watt-hour meter includes a base member 1 f, a metering unit 2, and a cover 3. The base member 1f is attached so that the back surface thereof is in contact with a wall or the like, and the measuring unit 2 is mounted on the front surface 11a. The upper side surface 11b, the left side surface 11c, and the right side surface 11d of the base member 1f are provided with a first concave portion 12a1 and a second concave portion 12a2 formed by grooves formed so as to be continuous on these three surfaces. Further, in the portion of the base member 1f closer to the front surface 11a than the second recess 12a2, the width of the upper side surface 11b is shorter than the original width of the base member 1f, and the width of the lower side surface is the original width of the base member 1 A taper is formed to be the same as the width.

  The measuring unit 2 is the same as that of the watt hour meter according to the first embodiment described above. The cover 3 is the same as that of the watt-hour meter according to the fourth embodiment.

  The cover 3 is pressed in the direction of the base member 1f (the direction of the arrow A in the figure) and aligned so that the convex portion 33a fits in the first concave portion 12a1 of the base member 1f, and then the upper side is moved downward (the arrow in the figure). B direction). Thus, the upper surface 11b of the base member 1f and the inner wall of the upper surface panel 31b, the left side surface 11c and the left side surface of the base member 1f in a state where the convex portion 33a of the cover 3 is housed in the first concave portion 12a1 of the base member 1f. The inner wall of the panel 31c and the right side surface 11d of the base member 1f and the inner wall of the right side panel 31d are attached so as to contact each other.

  The assembly of the watt hour meter is completed simply by pressing the cover 3 against the base member 1f and shifting it downward. Upon completion of this assembly, the side surface of the base member 1f and the inner wall of the cover 3 come into contact with each other, and the convex portion 33a of the cover 3 is received in the first concave portion 12a1 of the base member 1, so that the base member 1f and the cover 3 Will be sealed.

  In this sealed state, even if rainwater enters from the contact portion between the base member 1f and the cover 3 due to weather conditions such as heavy rain, the rainwater that has entered the second recess provided on the side surface of the base member 1f It flows through 12a2 and naturally falls from the open part below. At this time, even if rainwater that has entered exceeds the second recess 12a2 and reaches the first recess 12a1, the projection 33a of the cover 3 is received in the first recess 12a1 of the base member 1f and sealed. Thus, it is possible to more reliably prevent water from entering the interior than the watt-hour meter according to Example 4 described above.

  As described above, according to the watt-hour meter according to the sixth embodiment of the present invention, the same effect as that of the watt-hour meter according to the first embodiment described above can be obtained.

  The watt-hour meter according to Embodiment 7 of the present invention is a modification of the watt-hour meter according to Embodiment 5. FIG. 8 is an external perspective view showing an exploded structure of the watt-hour meter according to the seventh embodiment. FIG. 8A is a diagram viewed from diagonally above, and FIG. 8B is a diagram viewed from diagonally below. It is.

  This watt-hour meter includes a base member 1 g, a measuring unit 2 and a cover 3. The base member 1g is attached so that the back surface thereof is in contact with a wall or the like, and the measuring unit 2 is mounted on the front surface 11a2. Further, the front surface 11a2 of the base member 1g has a second recess 12b2 formed of a groove formed so as to be continuous with a predetermined distance from each of the upper side surface 11b2, the left side surface 11c2 and the right side surface 11d2 of the base member 1g. Further, a first recess 12b1 made of a continuous groove is provided on the inner side.

  The measuring unit 2 is the same as that of the watt hour meter according to the first embodiment described above. The cover 3 is the same as that of the watt-hour meter according to the fifth embodiment.

  The cover 3 is pressed in the direction of the base member 1g (in the direction of the arrow A in the figure) after being aligned so that the convex portion 33c fits in the first concave portion 12b1 of the base member 1g. As a result, the upper surface 11b2 of the base member 1g and the inner wall of the upper surface panel 31b, the left side surface 11c2 and the left side surface of the base member 1g in a state where the convex portion 33c of the cover 3 is housed in the first concave portion 12b1 of the base member 1g. The inner wall of the panel 31c and the right side surface 11d2 of the base member 1g and the inner wall of the right side panel 31d are attached so as to contact each other.

  The assembly of the watt hour meter is completed simply by pressing the cover 3 against the base member 1g. When the assembly is completed, the side surface of the base member 1g and the inner wall of the cover 3 come into contact with each other, and the convex portion 33c of the cover 3 is received in the first concave portion 12b1 of the base member 1g. Will be sealed.

  In this sealed state, for example, even if rainwater enters from the contact portion between the base member 1g and the cover 3 due to weather conditions such as heavy rain, the rainwater that has entered the second recess provided on the side surface of the base member 1g It flows through 12b2 and naturally falls from the open part below. At this time, even if rainwater that has entered exceeds the second recess 12b2 and reaches the first recess 12b1, the projection 33c of the cover 3 is received in the first recess 12b1 of the base member 1g and sealed. Thus, it is possible to more reliably prevent water from entering the interior than the watt-hour meter according to Example 5 described above.

  As described above, according to the watt-hour meter according to the seventh embodiment of the present invention, the same effect as the watt-hour meter according to the first embodiment described above can be obtained.

  The watt-hour meter according to the eighth embodiment of the present invention is a modification of the watt-hour meter according to the sixth embodiment. FIG. 9 is an external perspective view showing an exploded structure of the watt-hour meter according to the sixth embodiment. FIG. 9A is a diagram viewed from diagonally above, and FIG. 9B is a diagram viewed from diagonally below. It is.

  This watt-hour meter includes a base member 1h, a metering unit 2, and a cover 3. The base member 1h is attached so that the back surface thereof is in contact with a wall or the like, and the weighing unit 2 is mounted on the front surface 11a. The structure of the base member 1h is the same as that of the watt-hour meter according to the sixth embodiment.

  The measuring unit 2 is the same as that of the watt hour meter according to the first embodiment described above.

  The cover 3 has a structure in which a first convex portion 33a1 and a second convex portion 33a2 are provided in addition to the watt-hour meter according to the first embodiment. The upper side panel 31b side of each of the first convex part 33a1 and the second convex part 33a2 has a constant height, and the left side panel 31c and the right side panel 31d side gradually from the constant height. A taper is formed so that the lower surface is lowered and has the same height as the inner wall.

  The cover 3 is pressed in the direction of the base member 1h (in the direction of the arrow A in the figure), and the first convex portion 33a1 and the second convex portion 33a2 are accommodated in the first concave portion 12a1 and the second concave portion 12a2 of the base member 1h. After being aligned in this way, it is slid from the upper direction to the lower direction (arrow B direction in the figure). As a result, the upper side surface 11b of the base member 1h and the first convex portion 33a1 and the second convex portion 33a2 of the cover 3 are accommodated in the first concave portion 12a1 and the second concave portion 12a2 of the base member 1h, respectively. The inner wall of the upper side panel 31b, the left side surface 11c of the base member 1h and the inner wall of the left side panel 31c, and the right side surface 11d of the base member 1h and the inner wall of the right side panel 31d are attached.

  The assembly of the watt hour meter is completed simply by pressing the cover 3 against the base member 1h and shifting it downward. Upon completion of this assembly, the side surface of the base member 1h and the inner wall of the cover 3 come into contact with each other, and the first convex portion 33a1 and the second convex portion 33a2 of the cover 3 become the first concave portion 12a1 of the base member 1 and The base member 1h and the cover 3 are sealed in the second recesses 12a2.

  In this sealed state, for example, even if rainwater enters from the contact portion between the base member 1h and the cover 3 due to weather conditions such as heavy rain, the intruded rainwater is provided in the first recess provided on the side surface of the base member 1h. It flows through 12a1 and the 2nd recessed part 12a2, and falls naturally from a lower open part. At this time, the first convex portion 33a1 and the second convex portion 33a2 of the cover 3 are respectively accommodated in the first concave portion 12a1 and the second concave portion 12a2 of the base member 1h and sealed in two stages. Water intrusion into the interior can be prevented more reliably than the watt-hour meter according to Example 6.

  As described above, according to the watt-hour meter according to the eighth embodiment of the present invention, the same operation and effect as those of the watt-hour meter according to the first embodiment described above can be obtained.

  The watt-hour meter according to the ninth embodiment of the present invention is a modification of the watt-hour meter according to the seventh embodiment. FIG. 10 is an exploded perspective view showing the structure of the watt-hour meter according to the ninth embodiment. FIG. 10 (a) is a diagram seen from diagonally above, and FIG. 10 (b) is a diagram seen from diagonally below. It is.

  This watt-hour meter includes a base member 1 i, a metering unit 2, and a cover 3. The base member 1i is attached so that the back surface thereof is in contact with a wall or the like, and the weighing unit 2 is mounted on the front surface 11a2. The structure of the base member 1i is the same as that of the watt-hour meter according to the seventh embodiment.

  The measuring unit 2 is the same as that of the watt hour meter according to the first embodiment described above.

  The cover 3 has a structure in which a first convex portion 33c1 and a second convex portion 33c2 are provided in addition to the watt-hour meter according to the second embodiment. Each of the 1st convex part 33c1 and the 2nd convex part 33c2 is formed so that it may have a fixed distance from the inner wall of the upper surface panel 31b, the left side panel 31c, and the right side panel 31d.

  The cover 3 is aligned so that the first convex portion 33c1 and the second convex portion 33c2 fit in the first concave portion 12b1 and the second concave portion 12b2 of the base member 1i, respectively, and then the direction of the base member 1i ( It is pressed in the direction of arrow A in the figure. As a result, the upper surface 11b of the base member 1i and the first convex portion 33c1 and the second convex portion 33c2 of the cover 3 are accommodated in the first concave portion 12b1 and the second concave portion 12b2 of the base member 1i, respectively. The inner wall of the upper surface panel 31b, the left side surface 11c2 of the base member 1i and the inner wall of the left side panel 31c, and the right side surface 11d2 of the base member 1i and the inner wall of the right side panel 31d are attached so as to contact each other.

  The assembly of the watt hour meter is completed simply by pressing the cover 3 against the base member 1i. Upon completion of this assembly, the side surface of the base member 1i and the inner wall of the cover 3 come into contact with each other, and the first convex portion 33c1 and the second convex portion 33c2 of the cover 3 become the first concave portion 12b1 of the base member 1i and The base member 1i and the cover 3 are sealed in the second recess 12b2.

  In this sealed state, even if rainwater enters from the contact portion between the base member 1i and the cover 3 due to weather conditions such as heavy rain, the intruded rainwater is provided in the first recess provided on the side surface of the base member 1i. It flows through 12b1 and the 2nd recessed part 12b2, and falls naturally from a lower open part. At this time, the first concave portion 12c1 and the second concave portion 12c2 of the cover 3 are respectively accommodated in the first concave portion 12b1 and the second concave portion 12b2 of the base member 1i and sealed in two stages. The water intrusion into the inside can be prevented more reliably than the watt hour meter according to FIG.

  As described above, according to the watt-hour meter according to the ninth embodiment of the present invention, the same effect as that of the watt-hour meter according to the first embodiment described above can be obtained.

  The present invention can be used for various instruments installed in places exposed to wind and rain such as outdoors.

1a to 1i Base member 2 Measuring unit 3 Cover 11a1 to 11a4 Front surface 11b of base member, 11b1 to 11b2 Upper side surface 11c of base member, 11c1 to 11c2 Left side surface 11d of base member, 11d1 to 11d2 Right side surface 12a, 12b of base member Base member recess 12a1 Base member first recess 12a2 Base member second recess 31a Cover front panel 31b Cover upper side panel 31c Cover left side panel 31d Cover right side panel 32 Cover recesses 33a-33c Cover convex portion 33a1, 33c1 Cover first convex portion 33a2, 33c2 Cover second convex portion

Claims (3)

A member provided with a recess composed of a groove formed so as to be continuous on the upper side surface, the left side surface and the right side surface, wherein the width of the upper side surface is shorter than the width of the upper side surface of the member and the width of the lower side surface is A base member having a front surface tapered to be the same as the width of the lower surface of the member;
A weighing unit mounted on the front surface of the base member;
It has an upper side panel, a left side panel, and a right side panel, the lower side is opened, and the upper side of the base member and the inner wall of the upper side panel on which the measuring unit is mounted, the left side and the left side of the base member A cover attached so that the inner wall of the panel and the right side surface of the base member and the inner wall of the right side panel are in contact with each other;
With
The cover has a constant height on the side of the upper side panel, and the sides of the left side panel and the right side panel are gradually lowered from the constant height, and the lower side is the same height as the inner wall of the cover. When the taper-shaped convex part is formed and attached to the base member, the concave part formed in the base member is fitted with the convex part formed in the cover. Watt hour meter. The plurality of recesses are formed in the base member, and the protrusions formed on the cover are fitted into recesses closest to the cover among the plurality of recesses. Watt hour meter. The base member has a plurality of recesses, the cover has a plurality of protrusions, and the plurality of protrusions formed on the cover are formed on the base member. The watt-hour meter according to claim 1, wherein the watt-hour meter is fitted in each of the recesses.

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