Drain valve drive device

Abstract

A drain valve driving device is provided to prevent water from entering a space surrounded by an upper case and a lower case from a joint between the upper case and the lower case, and to prevent the water from affecting the operation of electrical components in the space. The drain valve driving device for driving a valve core of a drain valve includes an upper case, a lower case, and a driving source disposed in a space surrounded by the upper case and the lower case. An upper fitting portion is provided on a lower end surface of the upper case, and a lower fitting portion is provided on an upper end surface of the lower case. The upper fitting portion has an upper fitting portion lower end surface and an upper fitting portion inner peripheral surface. The upper fitting portion inner peripheral surface is inwardly and upwardly of the upper fitting portion lower end surface. The lower fitting portion has a lower fitting portion upper end surface and a lower fitting portion outer peripheral surface. The lower fitting portion upper end surface is in abutment with the upper fitting portion lower end surface. The lower fitting portion outer peripheral surface is inwardly and upwardly of the lower fitting portion upper end surface, and is in abutment with the upper fitting portion inner peripheral surface on the entire periphery.

Description

Technical Field

[0001] This invention relates to a drain valve drive device for driving the valve core of a drain valve. Background Technology

[0002] Previously, there was a drain valve drive device used to drive the valve core of the drain valve to move, such as... Figure 10 and Figure 11 As shown, it includes: a housing 110X; a drive source 120X disposed within the housing 110X and a terminal 130X electrically connected to the drive source 120X; and a wire 140X connected to the terminal 130X. Specifically, as Figure 10 and Figure 11 As shown, terminal 130X extends from drive source 120X in the vertical direction ( Figure 11 The housing 110X protrudes vertically to the side (perpendicular to the plane of the paper). It has an upper shell 111X and a lower shell 112X. The upper shell 111X includes an integrally formed upper shell body 1111X and a terminal block 1112X. The lower shell 112X includes a separately formed lower shell body 1121X and a terminal cover 1122X. The upper shell body 1111X and the lower shell body 1121X form a space for housing the drive source 120X. The terminal block 1112X and the terminal cover 1122X are fixed together by screws 180X and form a space for housing the terminal 130X. One end of the wire 140X is connected to the terminal 130X by soldering. The other end of the wire 140X passes through a through hole in the bottom plate of the terminal cover 1122X and leads out to the outside of the housing 110X.

[0003] However, during the use of the above-mentioned drain valve drive device, water may sometimes splash onto the joint between the upper shell 111X and the lower shell 112X. Therefore, water may seep into the housing 110X through the joint between the upper shell 111X and the lower shell 112X. Once water seeps into the housing 110X, the terminal 130X inside the housing 110X may short-circuit, causing the drive source 120X to fail to drive the valve core of the drain valve normally. Summary of the Invention

[0004] The present invention was made to solve the above-mentioned problems, and its purpose is to provide a drain valve driving device that helps to prevent water from seeping into the space enclosed by the upper and lower shells from the joint and affecting the operation of electrical components in the space.

[0005] In order to achieve the above object, the present application provides a drain valve driving device for driving a poppet operation of a drain valve, comprising an upper case, a lower case, and a driving source provided in a space surrounded by the upper case and the lower case, wherein an upper fitting portion is provided at a lower end surface of the upper case, a lower fitting portion which fits with the upper fitting portion is provided at an upper end surface of the lower case, the upper fitting portion has an upper fitting portion lower end surface and an upper fitting portion inner peripheral surface, the upper fitting portion inner peripheral surface is located inward of the upper fitting portion lower end surface and upward, the lower fitting portion has a lower fitting portion upper end surface and a lower fitting portion outer peripheral surface, the lower fitting portion upper end surface abuts against the upper fitting portion lower end surface, the lower fitting portion outer peripheral surface is located inward of the lower fitting portion upper end surface and upward, and the lower fitting portion outer peripheral surface opposes the upper fitting portion inner peripheral surface from the inward side on the whole periphery.

[0006] According to the drain valve driving device of the present application, the upper fitting portion is provided at the lower end surface of the upper case, the lower fitting portion which fits with the upper fitting portion is provided at the upper end surface of the lower case, the upper fitting portion has the upper fitting portion lower end surface and the upper fitting portion inner peripheral surface, the upper fitting portion inner peripheral surface is located inward of the upper fitting portion lower end surface and upward, the lower fitting portion has the lower fitting portion upper end surface and the lower fitting portion outer peripheral surface, the lower fitting portion upper end surface abuts against the upper fitting portion lower end surface, the lower fitting portion outer peripheral surface is located inward of the lower fitting portion upper end surface and upward, and the lower fitting portion outer peripheral surface opposes the upper fitting portion inner peripheral surface from the inward side on the whole periphery, so even if water or the like splashes into the joint of the upper case and the lower case and penetrates between the upper fitting portion lower end surface and the lower fitting portion upper end surface, the water is blocked by the lower fitting portion outer peripheral surface and is less likely to penetrate into the inside of the case, so it is possible to prevent water from penetrating into the space surrounded by the upper case and the lower case from the joint of the upper case and the lower case and to prevent the water from affecting the operation of the electrical components in the space, and the like.

[0007] Further, in the drain valve driving device of the present application, it is preferable that the lower fitting portion outer peripheral surface and the upper fitting portion inner peripheral surface at least partially abut against each other.

[0008] According to the drain valve driving device of the present application, the lower fitting portion upper end surface and the upper fitting portion lower end surface at least partially abut against each other, so it is easy to position the upper case with respect to the lower case in a direction perpendicular to the up-down direction.

[0009] Further, in the drain valve driving device of the present application, it is preferable that the lower fitting portion outer peripheral surface and the upper fitting portion inner peripheral surface abut against each other on the whole periphery.

[0010] According to the drain valve driving device of the present application, the lower fitting portion outer peripheral surface and the upper fitting portion inner peripheral surface abut against each other on the whole periphery, so it is possible to reliably position the upper case with respect to the lower case in each direction perpendicular to the up-down direction.

[0011] Further, in the drain valve driving device of the present application, it is preferable that a terminal protrude from the driving source in a direction perpendicular to the up-down direction, the upper housing include an upper housing main body and a terminal seat formed integrally, the lower housing include a lower housing main body and a terminal cover formed separately, the upper housing main body and the lower housing main body enclose a space for accommodating the driving source, the terminal seat and the terminal cover enclose a space for accommodating the terminal, and the terminal cover is engaged with the lower housing main body and the terminal seat, respectively.

[0012] According to the drain valve driving device of the present application, the terminal cover is engaged with the lower housing main body and the terminal seat, respectively, so that the number of components can be reduced, the assembly efficiency can be improved, and the manufacturing cost can be reduced, as compared with a case where the terminal cover and the lower housing main body and the terminal seat are fixed to each other by a screw or the like.

[0013] Further, in the drain valve driving device of the present application, it is preferable that one of the lower housing main body and the terminal cover have a locking groove, and the other of the lower housing main body and the terminal cover have a locking piece, the locking groove being for the locking piece to be inserted in the up-down direction.

[0014] According to the drain valve driving device of the present application, the terminal cover can be positioned with respect to the lower housing main body in the horizontal direction by a simple structure of the locking groove and the locking piece, which contributes to a reduction in manufacturing cost.

[0015] Further, in the drain valve driving device of the present application, it is preferable that a lead wire be welded to a front end of the terminal, and a distance between a surface of the lower housing main body closest to the front end of the terminal in a direction in which the terminal protrudes from the driving source and the front end of the terminal be 6 mm or more when viewed in the up-down direction.

[0016] According to the drain valve driving device of the present application, the distance between the surface of the lower housing main body closest to the front end of the terminal in the direction in which the terminal protrudes from the driving source and the front end of the terminal is 6 mm or more when viewed in the up-down direction, so that the surface of the lower housing main body closest to the front end of the terminal in the direction in which the terminal protrudes from the driving source is less likely to be affected by a fusion welding operation, which contributes to an improvement in manufacturing efficiency.

[0017] Further, in the drain valve driving device of the present application, it is preferable that one of the terminal cover and the terminal seat have a protruding portion, and the other of the terminal cover and the terminal seat have an opening portion, the opening portion being for the protruding portion to be inserted from a direction perpendicular to the up-down direction.

[0018] According to the drain valve driving device of the present application, the terminal cover and the terminal seat can be combined so as not to be separable in the up-down direction by a simple structure of the protruding portion and the opening portion.

[0019] Further, in the drain valve driving device of the present application, it is preferable that a lead wire is connected to the front end of the terminal, a clamping groove for clamping the lead wire is formed on the outer surface of the side plate of the terminal cover away from the lower case main body, the clamping groove is open to the side, and extends from the upper end of the side plate to the bottom plate of the terminal cover.

[0020] According to the drain valve driving device of the present application, the clamping groove is formed on the outer surface of the side plate of the terminal cover away from the lower case main body, the clamping groove is open to the side, and extends from the upper end of the side plate to the bottom plate of the terminal cover, so that when the drain valve driving device is assembled, the lead wire connected to the terminal can be clamped into the clamping groove from the side while the clamping groove is observed, which helps to improve the assembly efficiency.

[0021] Further, in the drain valve driving device of the present application, it is preferable that the terminal includes a first terminal and a second terminal, the lead wire includes a first lead wire and a second lead wire, the clamping groove includes a first clamping groove and a second clamping groove, the terminal cover includes a partition plate extending from the bottom plate of the terminal cover to the vicinity of the top plate of the terminal seat on the upper side, the first terminal and the second clamping groove are located on one side in the thickness direction of the partition plate, the second terminal and the first clamping groove are located on the other side in the thickness direction of the partition plate, the first lead wire extends from the first terminal to the first clamping groove via the gap between the partition plate and the top plate, the portion of the first lead wire from the first terminal to the first clamping groove abuts against the edge of the partition plate facing the top plate to form a first U-shaped section, the second lead wire extends from the second terminal to the second clamping groove via the gap between the partition plate and the top plate, the portion of the second lead wire from the second terminal to the second clamping groove abuts against the edge of the partition plate facing the top plate to form a second U-shaped section.

[0022] According to the drain valve driving device of the present application, the terminal cover comprises a partition plate extending from the bottom plate of the terminal cover to the vicinity of the top plate of the terminal seat on the upward side, the first terminal is located on one side of the thickness direction of the partition plate, and the second terminal is located on the other side of the thickness direction of the partition plate, so that the first terminal and the second terminal are reliably separated by the partition plate, and short circuit between the two is avoided; and the first wire extends from the first terminal to the first clamping groove through the gap between the partition plate and the top plate, the portion of the first wire from the first terminal to the first clamping groove abuts against the edge of the partition plate facing the top plate to form a first U-shaped section, the second wire extends from the second terminal to the second clamping groove through the gap between the partition plate and the top plate, the portion of the second wire from the second terminal to the second clamping groove abuts against the edge of the partition plate facing the top plate to form a second U-shaped section, so that when an external force is applied to the portion of the first wire and the second wire away from the first terminal and the second terminal, the shape of the first U-shaped section and the second U-shaped section is reliably maintained by the edge of the partition plate facing the top plate, and the friction between the partition plate and the first wire and the second wire is used to reduce or eliminate the force transmitted to the connecting portion of the first wire and the first terminal and the connecting portion of the second wire and the second terminal, so as to avoid the breakage of the connecting portion of the first terminal and the first wire and the connecting portion of the second terminal and the second wire.

[0023] In addition, in the drain valve driving device of the present application, preferably, the partition plate is hollow, and is spaced apart from the first terminal and the second terminal.

[0024] According to the drain valve driving device of the present application, the partition plate is hollow, and is spaced apart from the first terminal and the second terminal, so that the insulation distance between the first terminal and the second terminal can be more reliably ensured, and short circuit between the first terminal and the second terminal is avoided.

[0025] In addition, in the drain valve driving device of the present application, preferably, a drain hole penetrating the bottom plate of the terminal cover in the up-down direction is arranged on the bottom plate of the terminal cover, and a surrounding barrier protruding toward the downward side is arranged on the bottom plate of the terminal cover, the surrounding barrier is arranged on the periphery of the drain hole, and is located between the portion of the wire penetrating the bottom plate of the terminal cover and the drain hole.

[0026] According to the drain valve driving device of the present application, the drain hole penetrating the bottom plate of the terminal cover in the up-down direction is arranged on the bottom plate of the terminal cover, so that even if water enters the housing, the water can be discharged to the outside by the drain hole, and water accumulation in the housing is avoided to affect the operation of the electrical components in the housing; and the surrounding barrier protruding toward the downward side is arranged on the bottom plate of the terminal cover, the surrounding barrier is arranged on the periphery of the drain hole, and is located between the portion of the wire penetrating the bottom plate of the terminal cover and the drain hole, so that when the water is discharged to the outside from the drain hole, the water flow to the wire can be inhibited by the surrounding barrier, which helps to avoid the water flowing along the wire to other electrical components, and the safety is improved.

[0027] (Inventive Effects)

[0028] According to the present application, the upper fitting portion is provided on the lower end surface of the upper case, the lower fitting portion is provided on the upper end surface of the lower case, the upper fitting portion has an upper fitting portion lower end surface and an upper fitting portion inner peripheral surface, the upper fitting portion inner peripheral surface is closer to the inner peripheral side and the upper side than the upper fitting portion lower end surface, the lower fitting portion has a lower fitting portion upper end surface and a lower fitting portion outer peripheral surface, the lower fitting portion upper end surface abuts against the upper fitting portion lower end surface, the lower fitting portion outer peripheral surface is closer to the inner peripheral side and the upper side than the lower fitting portion upper end surface, and the lower fitting portion outer peripheral surface is opposed to the upper fitting portion inner peripheral surface on the entire periphery from the inner peripheral side, so even if water or the like splashes into the joint portion of the upper case and the lower case and penetrates between the upper fitting portion lower end surface and the lower fitting portion upper end surface, the water is blocked by the lower fitting portion outer peripheral surface and is less likely to penetrate into the inside of the case, so it is possible to prevent water from penetrating into the space surrounded by the upper case and the lower case from the joint portion of the upper case and the lower case and to affect the operation of the electrical components in the space. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a perspective view schematically showing the appearance of a drain valve drive device according to an embodiment of the present application, and shows a state as viewed from the bottom side.

[0030] Figure 2 is a partial cross-sectional view schematically showing the structure in the vicinity of a motor main body of a drain valve drive device according to an embodiment of the present application.

[0031] Figure 3 is a partial cross-sectional view schematically showing the structure in the vicinity of a terminal of a drain valve drive device according to an embodiment of the present application.

[0032] Figure 4A is a side cross-sectional view schematically showing a joint portion between an upper case and a lower case of a drain valve drive device according to an embodiment of the present application.

[0033] Figure 4B is a partial enlarged view of the joint portion between a terminal seat and a terminal cover of Figure 4A

[0034] Figure 5 is a side view schematically showing a state in which the terminal cover is removed from a drain valve drive device according to an embodiment of the present application.

[0035] Figure 6 is a partial cross-sectional view schematically showing a state in which the terminal cover is being attached to the lower case main body and the terminal seat of a drain valve drive device according to an embodiment of the present application.

[0036] Figure 7 is a partial cross-sectional view schematically showing a drain valve drive device according to an embodiment of the present application.

[0037] Figure 8 ​Fig. 7 is a partial bottom view schematically showing a portion of the upper case side of the drain valve drive device according to the embodiment of the present application.

[0038] Figure 9 Fig. 8 is a perspective view schematically showing a terminal cover included in the lower case of the drain valve drive device according to the embodiment of the present application.

[0039] Figure 10 Fig. 9 is a partial perspective view schematically showing the drain valve drive device according to the embodiment of the present application, and shows a state observed from the bottom side.

[0040] Figure 11 Fig. 10 is a partial bottom view schematically showing a state in which the lower case is removed from the drain valve drive device according to the embodiment of the present application. Figure 10

[0041] (Symbol Explanation)

[0042] 100 drain valve drive device

[0043] 110 case

[0044] 111 upper case

[0045] 1111 upper case body

[0046] 1112 terminal seat

[0047] 11121 top plate

[0048] 11129 protrusion

[0049] 11122 side plate

[0050] 112 lower case

[0051] 1121 lower case body

[0052] 11218 locking groove

[0053] 1122 terminal cover

[0054] 11221 bottom plate

[0055] 11222 side plate

[0056] 11223 partition

[0057] 11225 first stopper

[0058] 11226 second stopper

[0059] 11227 fence

[0060] 11228 locking piece

[0061] 11229 opening ​

[0062] 120 drive source

[0063] 121 stator

[0064] 1211 stator core

[0065] 1212 coil

[0066] 122 rotor

[0067] 130 terminal

[0068] 131 first terminal

[0069] 132 second terminal

[0070] 140 lead wire

[0071] 141 first lead wire

[0072] 142 second lead wire

[0073] 150 gear mechanism

[0074] 160 pulley

[0075] 170 wire

[0076] 200 valve core

[0077] M1 upper fitting portion

[0078] M2 lower fitting portion

[0079] S11 lower end surface of upper fitting portion

[0080] S12 inner peripheral surface of upper fitting portion

[0081] S13 upper end surface of lower fitting portion

[0082] S14 outer peripheral surface of lower fitting portion

[0083] H1 drain hole DETAILED DESCRIPTION

[0084] Hereinafter, the drain valve drive device according to the embodiment of the present application will be described with reference to the drawings. Figures 1 to 9 The drain valve drive device according to the embodiment of the present application will be described below, wherein Figure 1 is a perspective view schematically showing the appearance of the drain valve drive device according to the embodiment of the present application, and shows a state observed from the bottom side, Figure 2 is a partial cross-sectional view schematically showing the structure of the vicinity of the motor body of the drain valve drive device according to the embodiment of the present application, Figure 3 is a partial cross-sectional view schematically showing the structure of the vicinity of the terminal of the drain valve drive device according to the embodiment of the present application, and Figure 4Ais a side sectional view schematically showing a joint between an upper case and a lower case of a drain valve driving device according to an embodiment of the present application, Figure 4B is Figure 4A is a partial enlarged view of a joint between a terminal seat and a terminal cover, Figure 5 is a side view schematically showing a state in which the terminal cover is removed from a drain valve driving device according to an embodiment of the present application, Figure 6 is a partial sectional view schematically showing a state in which the terminal cover is being attached to a lower case main body and a terminal seat of a drain valve driving device according to an embodiment of the present application, Figure 7 is a partial sectional view schematically showing a drain valve driving device according to an embodiment of the present application, Figure 8 is a partial bottom view schematically showing a part of an upper case side of a drain valve driving device according to an embodiment of the present application, Figure 9 is a perspective view schematically showing a terminal cover included in a lower case of a drain valve driving device according to an embodiment of the present application.

[0085] Here, for convenience of explanation, three directions orthogonal to each other are set as an X direction, a Y direction, and a Z direction, and one side in the X direction is set as XI, the other side in the X direction is set as X2, one side in the Y direction is set as Yl, the other side in the Y direction is set as Y2, one side in the Z direction is set as Zl, and the other side in the Z direction is set as Z2, wherein the Zl direction corresponds to an upper side in actual use, and the Z2 direction corresponds to a lower side in actual use.

[0086] (Overall structure of drain valve driving device)

[0087] As shown in Figures 1 to 3 , a drain valve driving device 100 is used to drive a valve element 200 of a drain valve to act, and includes a housing 110, a driving source 120 and a terminal 130 electrically connected to the driving source 120, which are arranged in the housing 110, and a wire 140 connected to the terminal 130.

[0088] Here, as shown in Figure 7 and Figure 8 , the terminal 130 includes a first terminal 131 and a second terminal 132, and the wire 140 includes a first wire 141 and a second wire 142, the first wire 141 is connected to the first terminal 131 by fusion welding, and the second wire 142 is connected to the second terminal 132 by fusion welding.

[0089] In addition, as shown in Figure 1 and Figure 2 , a gear mechanism 150 is arranged in the housing 110, a belt wheel 160 is arranged outside the housing 110, and the valve element 200 is connected to the belt wheel 160 via a wire 170, and the valve element 200 is subjected to a force of an unshown biasing member (toward the belt wheel 160). Figure 1the lower left) and is intended to move toward the closed position. While the drive source 120 is operating, power of the drive source 120 can be transmitted to the pulley 160 via the gear mechanism 150 to rotate the pulley 160, and the wire 170 is wound around the outer peripheral surface of the pulley 160, thereby switching the spool 200 to the open position against the force of the above-described force applying member.

[0090] Further, as shown in Figure 2 , the drive source 120 is a motor including a stator 121 having a stator core 1211 and a coil 1212 wound around the stator core 1211, and a rotor 122 rotatable with respect to the stator 121, and the coil wire constituting the coil 1212 is connected to the first terminal 131 and the second terminal 132, respectively.

[0091] (Structure of the housing)

[0092] As shown in Figure 1 , the housing 110 includes an upper housing 111 and a lower housing 112 which are attached and detached in the Z direction (corresponding to the first direction in the present application).

[0093] Here, as shown in Figures 1 to 3 , the upper housing 111 is overlaid on the lower housing 112 from the Z1 direction (i.e., the upper housing 111 is positioned higher than the lower housing 112), thereby forming a space for accommodating the drive source 120 and a space for accommodating the terminal 130.

[0094] Further, as shown in Figure 4A and Figure 4B , an upper engaging portion M1 is provided on the lower end surface of the upper housing 111, and a lower engaging portion M2 engaging with the upper engaging portion is provided on the upper end surface of the lower housing 112, wherein the upper engaging portion M1 has an upper engaging portion lower end surface S11 (in the illustrated example, perpendicular to the Z direction, but not limited thereto) and an upper engaging portion inner peripheral surface S12 (in the illustrated example, extending in parallel with the Z direction, but not limited thereto), the upper engaging portion inner peripheral surface S12 is positioned inwardly of the upper engaging portion lower end surface S11 and on the Z1 direction side (i.e., the upper side), the lower engaging portion M2 has a lower engaging portion upper end surface S13 (in the illustrated example, perpendicular to the Z direction, but not limited thereto) and a lower engaging portion outer peripheral surface S14 (in the illustrated example, extending in parallel with the Z direction, but not limited thereto), the lower engaging portion upper end surface S13 is in abutment with the upper engaging portion lower end surface S11, the lower engaging portion outer peripheral surface S14 is positioned inwardly of the lower engaging portion upper end surface S13 and on the Z1 direction side (i.e., the upper side), and on the entire periphery, the lower engaging portion outer peripheral surface S14 is opposed to the upper engaging portion inner peripheral surface S12 from the inner peripheral side (in the illustrated example, the lower engaging portion outer peripheral surface S14 is in abutment with the upper engaging portion inner peripheral surface S12 on the entire periphery except for the portion where the lead wire 140 is present).

[0095] Further, as shown in Figure 1 , Figure 3 andFigure 9 As shown in the figure, the upper case 111 includes an upper case main body 1111 and a terminal seat 1112 which are formed integrally, and the lower case 112 includes a lower case main body 1121 and a terminal cover 1122 which are formed separately, the upper case main body 1111 and the lower case main body 1121 enclose a space for accommodating the drive source 120, and the terminal seat 1112 and the terminal cover 1122 enclose a space for accommodating the first terminal 131 and the second terminal 132. Also, as shown in the figure, Figure 4A As shown in the figure, the upper case main body 1111 and the terminal seat 1112 each have an upper fitting portion lower end surface S11 and an upper fitting portion inner peripheral surface S12 which are continuous with each other, and the lower case main body 1121 and the terminal cover 1122 each have a lower fitting portion upper end surface S13 and a lower fitting portion outer peripheral surface S14 which are continuous with each other.

[0096] Further, as shown in the figure, Figure 1 , Figure 3 and Figure 8 the terminal seat 1112 has a top plate 11121 and a side plate 11122, the thickness direction of the top plate 11121 coincides with the Z direction, and the side plate 11122 extends from the peripheral edge of the top plate 11121 on three sides other than the side close to the upper case main body 1111 (the X1 direction side in the illustrated example) toward the Z2 direction. As shown in the figure, Figure 1 , Figure 3 and Figure 9 the terminal cover 1122 has a bottom plate 11221 and a side plate 11222, the thickness direction of the bottom plate 11221 coincides with the Z direction, and the side plate 11222 extends from the peripheral edge of the bottom plate 11221 toward the Z1 direction; and as shown in the figure, Figure 7 and Figure 9 the terminal cover 1122 has a partition plate 11223 which extends from the Y direction central portion of the bottom plate 11221 toward the Z1 direction to the vicinity of the top plate 11121 of the terminal seat 1112 (in the illustrated example, the partition plate 11223 is hollow, is separated from the first terminal 131 and the second terminal 132 by a gap in the Y direction, and extends from the Y direction central portion of the bottom plate 11221 to a position which is on the Z1 direction side of the connection portions of the first terminal 131 and the first lead wire 141, the connection portions of the second terminal 132 and the second lead wire 142, and which is on the Z1 direction side of the portions of the first lead wire 131 which pass through the first limiting portion 11225 described below and the portions of the second lead wire 132 which pass through the second limiting portion 11226 described below), the partition plate 11223 is separated from the top plate 11121 by a gap in the Z direction; and as shown in the figure, Figure 1 and Figure 9As shown, the side plate 11222 (in the illustrated example, the outer surface of the side plate 11222 away from the lower case main body 1121) has a first limiting portion 11225 and a second limiting portion 11226, which are located on both sides of the partition plate 11223 in the Y direction, the first limiting portion 11225 limits the movement of the first lead wire 141 in the radial direction of the first lead wire 141, and the second limiting portion 11226 limits the movement of the second lead wire 142 in the radial direction of the second lead wire 142 (in the illustrated example, the first limiting portion 11225 and the second limiting portion 11226 are a clamping groove extending in parallel with the partition plate 11223, i.e., along the Z direction, from the end of the Z1 direction side of the side plate 11222 to the bottom plate 11221 and penetrating the bottom plate 11221, which is open toward the X2 direction side).

[0097] In addition, as shown in Figure 1 , Figure 3 and Figure 6 , the terminal cover 1122 is engaged with the lower case main body 1121 and the terminal seat 1112, respectively. Specifically, the lower case main body 1121 has a clamping groove 11218, and the terminal cover 1122 has a clamping piece 11228, the clamping groove 11218 is for the clamping piece 11228 to be inserted in the Z direction (in the illustrated example, the clamping groove 11218 is provided at the end of the X2 direction side of the lower case main body 1121 in a manner extending in the Y direction, and is recessed from the bottom surface of the lower case main body 1121 toward the Z1 direction side, the clamping piece 11228 is provided at the end of the X1 direction side of the terminal cover 1122 in a manner extending in the Y direction, and extends from the bottom surface of the terminal cover 1122 toward the Z1 direction side, by inserting the clamping piece 11228 into the clamping groove 11218, the lower case main body 1121 and the terminal cover 1122 can be positioned in the X direction). And the terminal seat 1112 has a protruding portion 11129, and the terminal cover 1122 has an opening portion 11229, the opening portion 11229 is for the protruding portion 11129 to be inserted from the Y direction (in the illustrated example, the protruding portion 11129 protrudes from both sides of the terminal seat 1112 in the Y direction, a tab extending toward the Z1 direction side and elastically deformable in the Y direction is provided on both sides of the terminal cover 1122 in the Y direction, the tab has the opening portion 11229, by inserting the protruding portion 11129 into the opening portion 11229, the terminal cover 1122 and the terminal seat 1112 cannot be separated in the Z direction). And the upper case main body 1111 and the lower case main body 1121 are connected to each other by screws.

[0098] In addition, as shown in Figure 5As shown, the distance d between the surface of the lower case body 1121 closest to the front end of the terminal 130 (in the illustrated example, the surface of the X2 direction side of the lower case body 1121) and the front end of the terminal 130 in the direction in which the terminal 130 protrudes from the drive source 120 (in the illustrated example, the X2 direction) when viewed in the Z direction is preferably 6 mm or more.

[0099] Further, as shown in Figure 4A , Figure 6 and Figure 9 , a drain hole H1 that penetrates the bottom plate 11221 in the Z direction is provided on the bottom plate 11221 of the terminal cover 1122, and a fence 11227 that protrudes toward the Z2 direction side is provided on the bottom plate 11221 of the terminal cover 1122, the fence 11227 is provided on the periphery of the drain hole H1, and is positioned between the portion of the lead wire 140 that penetrates the bottom plate 11221 of the terminal cover 1122 and the drain hole H1.

[0100] (Configuration of the lead wire on the case)

[0101] As shown in Figure 1 , Figure 7 and Figure 8 , the first terminal 131 and the second limit portion 11226 are positioned on one side in the thickness direction of the partition 11223 (the Y1 direction side), and the second terminal 132 and the first limit portion 11225 are positioned on the other side in the thickness direction of the partition 11223.

[0102] Further, as shown in Figure 7 , the first lead wire 141 extends from the first terminal 131 through the first limit portion 11225 via the edge of the Z1 direction side of the partition 11223 (corresponding to the abutting portion in the present application), the portion of the first lead wire 141 from the first terminal 131 to the passage through the first limit portion 11225 forms a first U-shaped segment, the edge of the Z1 direction side of the partition 11223 abuts on the inside of the first U-shaped segment from the middle portion of the first U-shaped segment (in the illustrated example, the edge of the Z1 direction side of the partition 11223 abuts on the inside of the first U-shaped segment from the linear middle portion of the first U-shaped segment), the first limit portion 11225 holds the first lead wire 141, and the second lead wire 142 extends from the second terminal 132 through the second limit portion 11226 via the edge of the Z1 direction side of the partition 11223, the portion of the second lead wire 142 from the second terminal 132 to the passage through the second limit portion 11226 forms a second U-shaped segment, the edge of the Z1 direction side of the partition 11223 abuts on the inside of the second U-shaped segment from the middle portion of the second U-shaped segment (in the illustrated example, the edge of the Z1 direction side of the partition 11223 abuts on the inside of the second U-shaped segment from the linear middle portion of the second U-shaped segment), and the second limit portion 11226 holds the second lead wire 142.

[0103] (Effects of the embodiment)

[0104] According to the drain valve driving device 100 of the embodiment, the upper fitting portion M1 is provided at the lower end surface of the upper case 111, the lower fitting portion M2 that fits with the upper fitting portion M1 is provided at the upper end surface of the lower case 112, the upper fitting portion M1 has the upper fitting portion lower end surface S11 and the upper fitting portion inner peripheral surface S12, the upper fitting portion inner peripheral surface S12 is on the inner peripheral side and the upper side than the upper fitting portion lower end surface S11, the lower fitting portion M2 has the lower fitting portion upper end surface S13 and the lower fitting portion outer peripheral surface S14, the lower fitting portion upper end surface S13 abuts against the upper fitting portion lower end surface S11, the lower fitting portion outer peripheral surface S14 is on the inner peripheral side and the upper side than the lower fitting portion upper end surface S13, and on the entire circumference, the lower fitting portion outer peripheral surface S14 is on the inner peripheral side opposite to the upper fitting portion inner peripheral surface S12, so even if water or the like splashes at the joint of the upper case 111 and the lower case 112 and penetrates between the upper fitting portion lower end surface S11 and the lower fitting portion upper end surface S13, the water is blocked by the lower fitting portion outer peripheral surface S14 and is less likely to penetrate into the inside of the case 110, so it is possible to prevent water from penetrating from the joint of the upper case 111 and the lower case 112 into the space surrounded by the upper case 111 and the lower case 112 and to affect the operation of the electrical components such as the driving source 120 in the space.

[0105] The present application has been described above with reference to the drawings, but the specific implementation of the present application is not limited to the above-described embodiments.

[0106] For example, in the above-described embodiment, the lower fitting portion outer peripheral surface S14 can be in abutment with the upper fitting portion inner peripheral surface S12 on the entire circumference by leading the lead wire 140 out to the outside from a position other than the joint of the terminal cover 1122 and the terminal seat 1112 (for example, leading the lead wire 140 out to the outside from the inner side of the side plate 11222 of the terminal cover 1122 via the through hole in the bottom plate 11221).

[0107] Further, in the above-described embodiment, the first lead wire 141 is connected to the first terminal 131 by fusion welding, and the second lead wire 142 is connected to the second terminal 132 by fusion welding, but it is not limited thereto, and the first lead wire 141 can be connected to the first terminal 131 by soldering, riveting, or the like, and the second lead wire 142 can be connected to the second terminal 132 by soldering, riveting, or the like.

[0108] Further, in the above-described embodiment, the positions and shapes at which the locking groove 11218 and the locking piece 11228 are provided can be appropriately changed as needed, for example, the locking piece can be provided on the lower case main body 1121, and the locking groove that engages with the locking piece can be provided on the terminal cover 1122.

[0109] Further, in the above-described embodiment, the positions and shapes of the protruding portions 11129 and the opening portions 11229 can be appropriately changed as needed, and for example, the opening portions can be provided on the terminal housing 1112, and the protruding portions that are engaged with the opening portions by being inserted into the opening portions can be provided on the terminal cover 1122.

[0110] Further, in the above-described embodiment, the gap between the edge of the partition 11223 that faces the top plate 11121 and the top plate 11121 can be greater than or equal to the diameter of the wire 140, or can be slightly smaller than the diameter of the wire 140.

[0111] Further, in the above-described embodiment, the abutting portion is formed by the edge of the partition 11223 that faces the top plate 11121, but is not limited thereto, and for example, the abutting portion can be formed by an edge of a through hole (not shown) provided in the partition 11223, in which case, the partition 11223 can be formed on the terminal cover 1122, or can be formed on the terminal housing 1112.

[0112] Further, in the above-described embodiment, the first wire 141 and the second wire 142 cross each other when viewed in the X direction, but are not limited thereto, and for example, the partition 11223 can be provided so that the thickness direction thereof coincides with the X direction, and the first terminal 131 and the second terminal 132 can be positioned on the XI direction side of the partition 11223, the first limiting portion 11225 and the second limiting portion 11226 can be positioned on the X2 direction side of the partition 11223, and the first terminal 131 and the first limiting portion 11225 can be positioned on the Yl direction side, and the second terminal 132 and the second limiting portion 11226 can be positioned on the Y2 direction side.

[0113] Further, in the above-described embodiment, the first limiting portion 11225 and the second limiting portion 11226 are each a clamping groove that extends parallel to the partition 11223, that is, in the Z direction, from the end portion on the Zl direction side of the side plate 11222 to the bottom plate 11221 and penetrates the bottom plate 11221, and the clamping groove is open toward the X2 direction side, but are not limited thereto, and the first limiting portion 11225 and the second limiting portion 11226 can be formed by a hole that extends parallel to the partition 11223, and the first limiting portion 11225 and the second limiting portion 11226 can be formed in the entire range from the end portion on the Zl direction side of the side plate 11222 to the bottom plate 11221, or can be formed only in a part of the range.

[0114] It should be understood that the present application, within the scope thereof, can freely combine each part of the embodiments, or appropriately change, omit each part of the embodiments.

Claims

1. A drain valve drive device for driving a poppet action of a drain valve, comprising an upper case, a lower case, and a drive source disposed in a space surrounded by the upper case and the lower case, characterized by: an upper fitting portion provided at a lower end surface of the upper case; a lower fitting portion provided at an upper end surface of the lower case, the lower fitting portion being fitted to the upper fitting portion; the upper fitting portion having an upper fitting portion lower end surface and an upper fitting portion inner peripheral surface, the upper fitting portion inner peripheral surface being inwardly and upwardly of the upper fitting portion lower end surface; the lower fitting portion having a lower fitting portion upper end surface and a lower fitting portion outer peripheral surface, the lower fitting portion upper end surface abutting against the upper fitting portion lower end surface, the lower fitting portion outer peripheral surface being inwardly and upwardly of the lower fitting portion upper end surface and opposing the upper fitting portion inner peripheral surface on the entire periphery; a terminal protruding from the drive source toward a side direction perpendicular to the upper and lower directions; the upper case including an upper case main body and a terminal seat formed integrally; the lower case including a lower case main body and a terminal cover formed separately; the upper case main body and the lower case main body surrounding a space for accommodating the drive source; the terminal seat and the terminal cover surrounding a space for accommodating the terminal; the terminal cover being engaged with the lower case main body and the terminal seat, respectively; a lead wire being connected to a front end of the terminal; a card slot being formed on an outer surface of a side plate of the terminal cover, the side plate being distanced from the lower case main body, the card slot being for the lead wire to be engaged therein; the card slot being open toward the side direction and extending from an upper end of the side plate to a bottom plate of the terminal cover; the terminal including a first terminal and a second terminal; the lead wire including a first lead wire and a second lead wire; the card slot including a first card slot and a second card slot; the terminal cover including a partition plate extending from the bottom plate of the terminal cover upwardly to a vicinity of a top plate of the terminal seat; the first terminal and the second card slot being located on one side in a thickness direction of the partition plate; the second terminal and the first card slot being located on the other side in the thickness direction of the partition plate; the first lead wire extending from the first terminal to the first card slot via a gap between the partition plate and the top plate; a portion of the first lead wire from the first terminal to the first card slot abutting against an edge of the partition plate facing the top plate, forming a first U-shaped section; the second lead wire extending from the second terminal to the second card slot via the gap between the partition plate and the top plate; a portion of the second lead wire from the second terminal to the second card slot abutting against the edge of the partition plate facing the top plate, forming a second U-shaped section.

2. The drain valve drive device according to claim 1, characterized in that: the lower fitting portion outer peripheral surface at least partially abuts against the upper fitting portion inner peripheral surface.

3. The drain valve drive device according to claim 1, characterized in that: the lower fitting portion outer peripheral surface abuts against the upper fitting portion inner peripheral surface on the entire periphery.

4. The drain valve drive device according to claim 1, characterized in that: one of the lower case main body and the terminal cover has a carding groove; the other of the lower case main body and the terminal cover has a carding piece; the carding groove is for the carding piece to be inserted thereinto in the upper and lower directions. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 5. The drain valve driving device according to claim 1, wherein the lead wire is welded to a front end of the terminal.

6. The drain valve driving device according to claim 1, wherein one of the terminal cover and the terminal seat has a protruding portion, and the other of the terminal cover and the terminal seat has an opening portion into which the protruding portion is inserted from a side direction perpendicular to the up-down direction.

7. The drain valve driving device according to claim 1, wherein a drain hole that penetrates the bottom plate of the terminal cover in the up-down direction is provided in the bottom plate of the terminal cover, and a barrier that protrudes toward the lower side is provided in the bottom plate of the terminal cover, the barrier being provided at a periphery of the drain hole and being located between the portion of the lead wire that penetrates the bottom plate of the terminal cover and the drain hole. ​ ​ ​ ​ ​ ​ ​ ​

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