JP2006066232A - Drip-proof structure for preventing liquid infiltration of power supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide at low cost a drip-proof structure for preventing chemical liquid infiltration in the vicinity of an operating knob of a power supply device, with respect to the power supply device used under an environment where chemical mist floats. <P>SOLUTION: As a structure of a power supply device, in which chemical liquid hardly infiltrates from a gap between a rotary component with a shaft and a case panel, the operating knob attached to the shaft is formed in a nearly umbrella shape and a rib of concentric cylindrical shape to the shaft is formed at the case panel, and this rib is made as the one that closely contacts the outer circumference or (and) the inner circumference of the operating knob. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a drip-proof structure that prevents a chemical solution from entering in the vicinity of an operation knob of a power supply device used in an environment where a chemical mist drifts, such as near a plating tank.

  As a conventional technique, Patent Document 1 discloses a technique regarding a drip-proof structure between a rotary shaft type rotary part and a panel.

The following description is given as a prior art in “Japanese Patent Laid-Open No. 2003-4144” “Drip-proof structure of shaft”. In paragraph (0006), “in the conventional structure for preventing shafts using an O-ring, special processing of the member is necessary for mounting the O-ring”, and the number of manufacturing steps increases. Therefore, in paragraph (0009), “A packing having a skirt-like spatula with a closed tip in the operation knob is attached, the tip of the shaft is bonded to the operation knob, and the tip of the packing is brought into contact with the operation panel. There is a description of "

  In paragraph (0015) of the same publication, the problem was solved by touching the panel with a resilient skirt-like spatula that "the skirt-like spatula of the packing is pressed against the surface of the operation panel while being spread out". There is technical disclosure.

  Although the technology as described above is disclosed, for example, when the mass-production of the bonding process for attaching the skirt-like spatula to the tip of the operation knob with high angular accuracy, the perpendicularity between the shaft and the peripheral edge of the spatula prevails. Maintaining the accuracy to fulfill the purpose in this is a process with a high degree of production difficulty. It is an object of the present invention to achieve drip-proofing with a structure that does not require assembling steps like the skirt-like spatula.

  To prevent liquid droplets from flowing through the gap between the shaft and the panel when a rotary part is attached so that the shaft penetrates through this part and the shaft penetrates through this part and the rotary plate can be easily rotated. Forms a rib that acts as a dike surrounding the shaft in the panel, and if the height of the rib is larger than the thickness of the ridge when the droplet breaks and flows, it prevents it from flowing into the housing I learned that I can do it.

With regard to claim 1, in a drip-proof mounting structure that provides a drip-proof effect between a rotary part having a rotating shaft and a flat casing panel perpendicular to the shaft, A drip-proof structure for preventing liquid intrusion of the power supply device is provided, wherein a rib is formed on the casing panel in a cylindrical shape close to the outer peripheral portion of the operation knob having a concentric cylindrical shape and a substantially umbrella-shaped cross section.

  With regard to claim 2, in a drip-proof mounting structure that provides a drip-proof effect between a rotary part having a rotating shaft and a flat casing panel perpendicular to the shaft, A drip-proof structure for preventing intrusion of liquid in the power supply device is characterized in that a rib is formed on the casing panel in a cylindrical shape that is concentrically cylindrical and has a substantially umbrella-shaped cross section close to the inner periphery of the operation knob.

  According to a third aspect of the present invention, there is provided a drip-proof mounting structure that provides a drip-proof effect between a rotary part having a rotating shaft and a flat casing panel perpendicular to the shaft. A rib is formed on the casing panel in a double cylindrical shape close to the outer peripheral part and the inner peripheral part of the operation knob having a concentric cylindrical shape and a substantially umbrella-shaped cross section. A drip-proof structure was adopted.

  According to claim 4, in a drip-proof mounting structure that provides a drip-proof effect between a rotary part having a rotating shaft and a flat mounting plate perpendicular to the shaft, it is concentric with the shaft. A drip-proof structure for preventing liquid intrusion of the power supply device is provided, wherein a rib is formed on the mounting plate in a cylindrical shape close to the outer peripheral portion of the operation knob having a cylindrical shape and a substantially umbrella-shaped cross section.

  With respect to claim 5, in a drip-proof mounting structure that provides a drip-proof effect between a rotary component having a rotating shaft and a flat mounting plate perpendicular to the shaft, it is concentric with the shaft. A drip-proof structure for preventing liquid intrusion of the power supply device is provided, wherein a rib is formed on the mounting plate in a cylindrical shape close to the inner peripheral portion of the operation knob having a cylindrical shape and a substantially umbrella-shaped cross section.

  According to claim 6, in a drip-proof mounting structure that provides a drip-proof effect between a rotary part having a rotating shaft and a flat mounting plate perpendicular to the shaft, it is concentric with the shaft. A drip-proof for preventing liquid intrusion of a power supply device, characterized in that a rib is formed on the mounting plate in a cylindrical shape with a double cylindrical shape close to the outer peripheral portion and inner peripheral portion of the operation knob having a substantially umbrella-shaped cross section The structure.

  According to a seventh aspect of the present invention, there is provided a gap dimension in which a gap dimension between the operation knob and the cylindrical rib adjacent to the operation knob is formed to be 2 mm or less, and the liquid apparatus prevents liquid from entering the power supply apparatus according to any one of the first to sixth aspects. Drip-proof structure for

  The present invention relates to a rib dimension in which an overlap dimension with respect to the outer peripheral part of the knob or / and the inner peripheral part of the rib height dimension is a dimension of 1 mm or more. 1 to 6, a drip-proof structure for preventing liquid intrusion of the power supply device.

  With respect to the ninth aspect, the relationship between the gap and the rib height is such that the gap dimension between the operation knob and the cylindrical rib adjacent to the operation knob is 1 mm within the rib height dimension, the outer periphery of the knob, or (and) It is effective if the overlap dimension with respect to the peripheral part is a rib dimension formed to a dimension of 1 mm or more, and the outer peripheral part of the knob or (and) the inner peripheral part of the rib height dimension with respect to the gap dimension with the rib. The drip-proof structure for preventing liquid intrusion of the power supply device according to claim 1, wherein the dimension of the rib is a dimension of a rib formed at a ratio of a ratio of 1 or more.

  According to a tenth aspect of the present invention, a spacer is formed between the rotating shaft and the mounting plate or the housing panel in order to provide a high-performance drip-proof effect. A drip-proof structure was used for prevention.

  According to the present invention, there is no extra manufacturing cost for processing the operation knob into a complicated shape as in the conventional example. In addition, the drip-proof performance can be improved and the loss of material resources can be reduced.

  An embodiment according to the present invention shown in FIG. 1 will be described. Reference numeral 1 denotes a housing panel. A rotary component 7 is attached to this panel and is operated by two operation knobs. In order to prevent liquid from flowing in between the panel and the shaft of 8, a rib 5 is provided in the vicinity of the outer peripheral portion 3 of the operation knob. G1 is the gap dimension between the outer peripheral part and the rib 5, L is the overlapping dimension of the rib height with the outer peripheral part 3, and how to determine the dimension between this dimension and the gap G1 has been confirmed by experiments, and the performance is optimal. In addition, the dimensions are determined so as not to cause difficulty in mass production in consideration of workability. It was confirmed that the value of L / G1 for which workability and performance optimization are compatible was 1, and the value of L / G1 was 1 or more was effective for drip-proofing.

  A second embodiment according to the present invention shown in FIG. 2 will be described. The difference from FIG. 1 is that the position of the rib 6 is provided at a position close to the inner peripheral portion 4 of the operation knob 2. The effect is not inferior to the case of FIG. 1 when the housing panel 1 is in an inclined position close to the horizontal.

  A third embodiment according to the present invention will be described with reference to FIG. In addition to the case of FIG. 1, ribs 6 are also provided at positions close to the inner peripheral portion 4 of the operation knob 2. Drip-proof performance is the best, but accuracy is required, so it is important that the position where the rib stands is in contact with the knob so that there is no hindrance to rotation, taking into account the shrinkage rate during resin molding, for example Therefore, higher accuracy is required. The casing panel described in FIGS. 1 to 3 is formed of a resin molded product suitable for rib processing.

  A fourth embodiment according to the present invention will be described with reference to FIG. If the casing panel is made of metal, unlike the case described above, the manufacturing cost in the processing step for forming the ribs becomes expensive, so the mounting plate such as a resin molded product provided with ribs has a large window. Attached to the panel to form a rotary part attachment. A mounting plate 9 such as a resin molded product is attached to the window of the housing panel 1. A rotary component 7 is attached to the attachment plate 9 and is operated by two operation knobs. In order to prevent liquid from flowing in between the mounting plate and the shaft 8, a rib 5 is provided adjacent to the outer peripheral portion 3 of the operation knob.

  A fifth embodiment of the present invention will be described with reference to FIG. When the casing panel is made of metal, a mounting plate 9 such as a resin molded product provided with ribs is attached to the window of the casing panel 1 having a large window. A rotary component 7 is attached to the attachment plate 9 and is operated by two operation knobs. In order to prevent liquid from flowing into between the mounting plate and the shaft of the shaft 8, as in the case shown in FIG. The rib 6 is formed on the mounting plate 9 in place of the panel 1.

  A fifth embodiment according to the present invention will be described with reference to FIG. When the casing panel is made of metal, a mounting plate 9 such as a resin molded product provided with ribs is attached to the window of the casing panel 1 having a large window. A rotary component 7 is attached to the attachment plate 9 and is operated by two operation knobs. In order to prevent the liquid from flowing between the mounting plate and the shaft of the shaft 8, as in the case shown in FIG. The rib 5 and the rib 6 are formed on the mounting plate 9 in place of the panel 1 in a double cylindrical shape adjacent to the peripheral portion.

  It has been found that when the rib height dimension is 1 mm or more, it can act as a levee for droplets. It is effective if the rib dimension is 1 mm or more, but in this case, it is desirable that the gap dimension G1 between the operation knob and the cylindrical rib adjacent to the operation knob is 1 mm or less, and the rib height dimension is 2 mm or more. Has confirmed that it is effective if the gap dimension G1 between the operation knob and the cylindrical rib adjacent to the operation knob is 2 mm or less, and a drip-proof structure for preventing liquid intrusion of the power supply device is provided.

  The overlap dimension L with respect to the knob outer peripheral part or / and the inner peripheral part of the rib height dimension is 1 or more times the gap dimension G1 between the cylindrical rib and the knob peripheral edge as in the case of FIG. It is confirmed that it is important to form the rib dimensions in the dimensions of the ratio in order to ensure the performance in the first to fifth embodiments, and it is effective as a drip-proof structure for preventing liquid intrusion of the power supply device. Met.

  In the seventh embodiment shown in FIG. 7, it is important to reduce the gap around the shaft to the limit in order to ensure high performance in the harsh usage environment in the first to sixth embodiments. From the recognition that there is a double drip-proof structure for preventing liquid intrusion into the power supply device by forming a spacer 10 between the shaft and the mounting plate or the housing panel so that the shaft is slidable in the rotational direction. It was effective. The spacer 10 is effective if it is made of a resilient material containing an oily material such as felt so as not to fall off. The eighth embodiment shown in FIG. 8 is provided with a perforated pacer 11 having a hole that slides on a shaft affixed to one side of the mounting plate, and is double drip-proof for preventing liquid from entering the power supply device. The structure.

  As in the conventional example disclosed, the process of attaching a skirt-like spatula to the tip of the control knob with high angular accuracy is the accuracy that fulfills the purpose when the squareness between the spatula and the shaft varies in mass production. However, according to the structure of the present invention that achieves the drip-proof effect with a structure that does not require assembling man-hours, such as this skirt-like spatula, ) Is large and industrially effective.

  According to the present invention, it is possible to contribute to the reduction of material resource loss and also to resource saving, so that the industrial value is high.

Structure explanatory drawing which shows embodiment by this invention. Structure explanatory drawing which shows 2nd Embodiment by this invention. Structure explanatory drawing which shows 3rd Embodiment by this invention. Structure explanatory drawing which shows 4th Embodiment by this invention. Structure explanatory drawing which shows 5th Embodiment by this invention. Structure explanatory drawing which shows the 6th Embodiment by this invention. Structure explanatory drawing which shows the 7th Embodiment by this invention. Structure explanatory drawing which shows 8th Embodiment by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing panel 2 Operation knob 3 Outer peripheral part 4 Inner peripheral part 5 Rib 6 Rib 7 Rotary component 8 Shaft 9 Mounting plate 10 Spacer 11 Perforated spacer G1 Gap dimension G2 Gap dimension L Overlapping dimension

Claims (10)

In a drip-proof mounting structure that provides a drip-proof effect between a rotary part having a rotating shaft and a flat casing panel perpendicular to the shaft, the cross-section is concentric cylindrical with respect to the shaft. A drip-proof structure for preventing liquid intrusion of a power supply device, characterized in that a rib is formed on a casing panel in a cylindrical shape close to an outer peripheral portion of a substantially umbrella-shaped operation knob. In a drip-proof mounting structure that provides a drip-proof effect between a rotary part having a rotating shaft and a flat casing panel perpendicular to the shaft, the cross-section is concentric cylindrical with respect to the shaft. A drip-proof structure for preventing liquid from entering a power supply device, wherein a rib is formed on a casing panel in a cylindrical shape close to an inner peripheral portion of a substantially umbrella-shaped operation knob. In a drip-proof mounting structure that provides a drip-proof effect between a rotary part having a rotating shaft and a flat casing panel perpendicular to the shaft, the cross-section is concentric cylindrical with respect to the shaft. A drip-proof structure for preventing liquid intrusion of a power supply device, wherein a rib is formed on a housing panel in a double cylindrical shape adjacent to an outer peripheral portion and an inner peripheral portion of a substantially umbrella-shaped operation knob. In a drip-proof mounting structure that provides a drip-proof effect between a rotary part having a rotating shaft and a flat mounting plate that is perpendicular to the shaft, the cross-section is substantially concentric with the shaft. A drip-proof structure for preventing intrusion of liquid in a power supply device, wherein a rib is formed on a mounting plate in a cylindrical shape close to an outer peripheral portion of an umbrella-shaped operation knob. In a drip-proof mounting structure that provides a drip-proof effect between a rotary part having a rotating shaft and a flat mounting plate that is perpendicular to the shaft, the cross-section is substantially concentric with the shaft. A drip-proof structure for preventing intrusion of liquid in a power supply device, characterized in that a rib is formed on a mounting plate in a cylindrical shape close to an inner peripheral portion of an umbrella-shaped operation knob. In a drip-proof mounting structure that provides a drip-proof effect between a rotary part having a rotating shaft and a flat mounting plate that is perpendicular to the shaft, the cross-section is substantially concentric with the shaft. A drip-proof structure for preventing liquid from entering a power supply device, wherein a rib is formed on a mounting plate in a double cylindrical shape adjacent to an outer peripheral portion and an inner peripheral portion of an umbrella-shaped operation knob. 7. A drip-proof structure for preventing liquid from entering a power supply device according to claim 1, wherein the gap between the operation knob and the cylindrical rib adjacent to the operation knob is 2 mm or less. . The rib dimension formed so that the overlap dimension with respect to the outer peripheral part of the knob or (and) the inner peripheral part of the rib height dimension is a dimension of 1 mm or more. A drip-proof structure to prevent liquid from entering the power supply. Dimension of ratio of the height of the rib to the outer peripheral part of the knob or (and / or) the inner peripheral part of the gap dimension between the operation knob and the cylindrical rib adjacent to the control knob is one or more times. The drip-proof structure for preventing liquid from entering the power supply device according to claim 1, wherein the rib is formed in a dimension of the rib. 10. The prevention device for preventing liquid intrusion of a power supply device according to claim 1, wherein a spacer is formed between the shaft and the mounting plate or the housing panel so that the shaft is slidable in the rotation direction. Drop structure.

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