JP7297578B2 - solenoid - Google Patents

Description

The present invention relates to solenoids.

In the diaphragm switch described in Patent Document 1 below, as shown in FIG. 4 of Patent Document 1, the inside of a body (housing) is partitioned into a pressure chamber and an operation chamber by a diaphragm. A plunger and a slider are arranged in the pressure chamber, and a fixed contact and a movable contact are arranged in the action chamber. By displacing the plunger, the movable contact approaches the fixed contact, and the switch is switched from off to on. Further, the outer peripheral portion of the diaphragm is arranged between the terminal base arranged on the opening side of the body and the stepped portion of the body, and is sandwiched between them. This also allows the working chamber to be sealed by the diaphragm.

By the way, some solenoids mounted on vehicles (automobiles) have a switch structure composed of a movable contact and a fixed contact, such as the diaphragm switch. This solenoid has a pair of coils, and when the solenoid is actuated, the switch is switched from on to off so that one coil is de-energized and only the other coil is energized. Thereby, for example, the power consumption of the solenoid can be reduced.

Patent No. 3840366

However, in a solenoid having a switch structure, when the seal structure described in Patent Document 1 is applied in order to ensure the waterproofness of the movable contact and the fixed contact against liquids such as water and oil, the following problems occur. There is a problem. That is, in this case, the diaphragm divides the housing of the solenoid into a pressure chamber and an operation chamber. Components such as a plunger and a bobbin of the solenoid are arranged in the pressure chamber, and fixed contacts and movable contacts are arranged in the operation chamber. Furthermore, the outer peripheral portion of the diaphragm is sandwiched between the stepped portion of the housing and the terminal base.

Here, as described above, in the solenoid, it is necessary to make the diameter of the housing large enough to accommodate the components such as the plunger and the bobbin. For this reason, if the diaphragm partitions the inside of the housing in order to ensure the waterproofness of the movable contact and the fixed contact against liquid, there is a problem that the size of the diaphragm becomes large.

SUMMARY OF THE INVENTION In view of the above facts, it is an object of the present invention to provide a solenoid in which the size of the diaphragm can be reduced and the waterproofness of the fixed and movable contacts against liquid can be ensured.

One or more embodiments of the present invention are formed in a stepped cylindrical shape that is open in one axial direction, and have a large diameter portion and a large diameter portion extending from the large diameter portion in the other axial direction and extending in the other axial direction. a housing configured to include a small-diameter portion having an opening at an end thereof; a bobbin that is housed inside the large-diameter portion and formed in a cylindrical shape around which a coil is wound; and the small-diameter portion. and a plunger arranged inside the bobbin, projecting from the opening hole to the other side in the axial direction of the housing, and moving to the one side in the axial direction of the housing when actuated; and a terminal base having a fixed contact provided on one side in the axial direction of the housing; A contact member that moves to one axial side of a housing, a cover that closes an opening of the housing, a connector that is provided on one axial side of the housing and is fixed to the cover, the terminal base, and the bobbin. and a communication hole that defines the interior of the large-diameter portion in the axial direction and opens toward the terminal base, and communicates the interior of the bobbin with the interior of the interior of the accommodation recess. a partition wall provided inside the accommodation recess, closing the communication hole, and elastically deforming by being pressed by the plunger when the plunger is actuated, and actuating the contact member; is a solenoid with

In one or more embodiments of the present invention, the bobbin is made of resin, and the partition wall is made of metal, and is formed into a plate shape whose plate thickness direction is the axial direction of the housing. It is a solenoid that is

In one or more embodiments of the present invention, the partition wall and the housing are made of metal, the outer peripheral portion of the partition wall is in contact with the housing, and the partition wall is grounded. The solenoid is provided with a terminal, the ground terminal is connected to one end of the coil, and the one end of the coil is grounded to the housing via the ground terminal.

In one or more embodiments of the present invention, the terminal base includes a contact accommodating portion opened to one axial direction side of the housing and having the fixed contact arranged on the bottom surface thereof, and a contact accommodating portion on the bottom surface of the contact accommodating portion. an insertion hole that communicates between the interior of the contact housing portion and the interior of the housing recess, and the contact member is housed in the contact housing portion and inserted into the insertion hole. and the contact receiving portion is closed by the cover.

In one or more embodiments of the present invention, the terminal base is fixed to the bobbin, the partition wall is sandwiched between the terminal base and the bobbin, and the outer peripheral portion of the diaphragm is formed between the partition wall and the bobbin. This is the solenoid sandwiched between the terminal bases.

In one or more embodiments of the present invention, a stepped portion projecting radially outward is formed on one axial side of the large-diameter portion, and a stepped portion is formed on one axial end of the large-diameter portion. is formed with a fixed flange portion bent radially inward, and the outer peripheral portions of the partition wall, the terminal base, and the cover are held between the stepped portion and the fixed flange portion. is.

In one or more embodiments of the present invention, the diaphragm is formed in the shape of a circular sheet, and includes a fixed portion that constitutes an outer peripheral portion of the diaphragm and is sandwiched between the terminal base and the partition wall; A pressing portion that constitutes the central portion of the diaphragm and is pressed by the plunger, and a deformable portion that is provided between the fixing portion and the pressing portion and elastically deforms when pressed by the plunger. A ring-shaped abutting portion projecting toward the diaphragm is formed on a surface of the terminal base facing the accommodating recess, and the deformable terminal base is elastically deformed when pressed by the pressing portion of the plunger. The outer peripheral portion of the portion is a solenoid that abuts on the abutting portion.

In one or more embodiments of the present invention, a connection terminal portion connected to the coil is provided on one axial side of the housing with respect to the cover, and the cover is attached to the shaft of the housing. a connector main body having a support portion projecting in one direction, the connector having a support hole rotatably assembled to the support portion in a temporarily assembled state before fixing the connector to the cover; a connector terminal formed integrally with a connector body and having a fixed terminal portion fastened together with the connection terminal portion to the cover by a terminal fixing screw, the fixed terminal portion extending in the circumferential direction of the housing. Extending to allow a change in the assembly position of the connector in the temporarily assembled state, the outer peripheral portion on the open end side of the housing, the terminal fixing screw, the fixed terminal portion, and the support hole are , the solenoid covered by the mold.

According to the solenoid of one or more embodiments of the present invention, it is possible to reduce the size of the diaphragm while ensuring the waterproofness of the fixed contact and the movable contact against liquid.

(A) is a plan view of the solenoid according to the present embodiment as seen from above; (B) is a side view of the solenoid of (A) as seen from one side in the first direction; [Fig. 3] is a side view of the solenoid of (A) as seen from the other side in the second direction. FIG. 2 is a vertical cross-sectional view of the solenoid shown in FIG. 1 cut along a first reference line (cross-sectional view taken along line 2-2 in FIG. 1); FIG. 2 is a vertical cross-sectional view (a cross-sectional view taken along line 3-3 in FIG. 1) of the solenoid shown in FIG. 1 cut along an inclination reference line; 4 is an exploded perspective view of the contact mechanism shown in FIG. 3; FIG. (A) is a plan view showing a state in which the solenoid body shown in FIG. 4 is accommodated in the upper housing portion of the housing, and (B) is a first power supply formed in the terminal base shown in (A). FIG. 4 is a plan view showing a terminal, a second power supply terminal, and a switch terminal; (A) is a plan view of the yoke shown in FIG. 2, and (B) is a side view of the yoke of (A) viewed from the other side in the second direction. FIG. 3 is an exploded perspective view showing a state before assembly of the connector shown in FIG. 2; 8A is a plan sectional view showing a state in which the connector shown in FIG. 7 is attached to the cover, with the cover base portion cut away; FIG. 8B is a vertical cross-sectional view (cross-sectional view taken along the line 8B-8B in FIG. 8(A)) showing a state of being crimped with the part. FIG. 8 is a plan view showing the entire connector terminal shown in FIG. 7; (A) is a longitudinal cross-sectional view showing the periphery of the diaphragm shown in FIG. It is a longitudinal cross-sectional view which shows the state arrange|positioned at a connection position. (A) is a plan view showing a state in which the temporarily assembled connector is arranged at a first assembly position, and (B) is a plan view showing a state in which the temporarily assembled connector is arranged at a second assembly position; It is a plan view showing.

The solenoid 10 according to this embodiment will be described below with reference to the drawings. As shown in FIGS. 1(A) to 1(C), the solenoid 10 as a whole is formed in a substantially stepped columnar shape. In the following description, one side of the solenoid 10 in the axial direction (direction of arrow A in FIGS. 1B and 1C) is the upper side of the solenoid 10, and the other side of the solenoid 10 in the axial direction (the side of the arrow A in FIG. 1B) and (C) in the direction of arrow B) is the lower side of the solenoid 10 . In a plan view from above, the direction perpendicular to the vertical direction is the first direction (see arrows C and D in FIGS. 1A and 1C), and the axis AL of the solenoid 10 is An overhead line that passes through and extends in the first direction is defined as a first reference line L1. Furthermore, in a plan view, a direction orthogonal to the first direction is defined as a second direction (see arrows E and F in FIGS. 1A and 1B), and passes through the axis AL and is the second direction. A second reference line L2 is an overhead line along the .

A solenoid 10 is mounted on a vehicle (automobile) and connected to a control rack pin of the vehicle. The actuation of the solenoid 10 drives the control rack pin. As shown in FIGS. 1 to 3, the solenoid 10 includes a housing 12, a solenoid body 20, a contact mechanism 50, a cover 62, a connector 70, and a molded portion 80. Each configuration of the solenoid 10 will be described below.

(Regarding housing 12)
A housing 12 forms an outer shell of the solenoid 10 . The housing 12 is made of a metal plate and is formed into a bottomed, stepped cylindrical shape that opens upward by press working or the like. Specifically, the lower portion of the housing 12 is configured as a lower housing portion 12L as a “small diameter portion”, and the upper portion of the housing 12 is configured as an upper housing portion 12U as a “large diameter portion”. The diameter of the portion 12L is set smaller than the diameter of the upper housing portion 12U.

A fixing plate 14 is provided on the radially outer side of the upper end portion of the lower housing portion 12L. The fixing plate 14 is formed in a substantially rhombic shape in plan view with the vertical direction being the plate thickness direction, and is fixed to the upper end portion of the lower housing portion 12L. In addition, the fixing plate 14 is attached to the housing 12 on one side in the second direction (direction of arrow E in FIGS. 1A and 1B) and on the other side in the second direction (FIGS. 1A and 1B). 1B), and a fixing hole 14A (see FIG. 1A) is formed through the projecting portion in the vertical direction. Fastening members such as bolts are inserted into the fixing holes 14A to fix the fixing plate 14 (that is, the solenoid 10) to the vehicle.

A stepped portion 12A projecting radially outward is formed in the upper end portion of the upper housing portion 12U. A fixed flange portion 12B is formed at the upper end portion of the upper housing portion 12U. The fixed flange portion 12</b>B is bent radially inward of the housing 12 and is formed along the entire circumference of the housing 12 . The fixed flange portion 12B is formed by bending or the like after the solenoid body 20, the contact mechanism 50, and the cover 62, which will be described later, are assembled into the housing 12. As shown in FIG. Further, an opening hole 12C is vertically formed through the bottom wall of the lower housing portion 12L, and the opening hole 12C is arranged coaxially with the axis line AL.

A guide pipe 16 for guiding a plunger 22, which will be described later, is fitted inside the lower housing portion 12L. The guide pipe 16 is formed in a bottomed cylindrical shape that is open upward. A guide hole 16A is vertically formed through the bottom wall of the guide pipe 16, and the guide hole 16A is arranged coaxially with the axis AL. Thereby, the inside and the outside of the housing 12 are communicated with each other through the opening hole 12C and the guide hole 16A. Between the bottom wall of the housing 12 and the bottom wall of the guide pipe 16, a substantially annular sheet-like packing 18 is arranged.

(Regarding Solenoid Body 20)
As shown in FIGS. 2 and 3, the solenoid body 20 includes a plunger 22 and a coil base assembly 26. As shown in FIG.

<Regarding the plunger 22>
The plunger 22 is made of a magnetic material and has a substantially stepped columnar shape with an axial direction extending in the vertical direction. Specifically, the plunger 22 includes a plunger body 22A forming an upper portion of the plunger 22 and a connecting shaft 22B extending downward from the plunger body 22A. is set smaller than the diameter of the plunger main body 22A. The lower portion of the plunger main body 22A is inserted into the guide pipe 16 so as to be relatively movable in the vertical direction, and the connecting shaft 22B is vertically inserted into the opening hole 12C of the housing 12 and the guide hole 16A of the guide pipe 16. It is inserted so that relative movement is possible. The connecting shaft 22B is connected to a control rack pin of the vehicle.

A step portion 22C that is one step downward in the radial direction is formed in the vertical intermediate portion of the outer peripheral portion of the plunger main body 22A, and the step portion 22C is formed over the entire circumferential direction of the plunger main body 22A. . A return spring 24 configured as a compression coil spring is attached to the upper portion of the plunger main body 22A. The lower end of the return spring 24 is engaged with the stepped portion 22C of the plunger body 22A, and the upper end of the return spring 24 is engaged with a yoke 44, which will be described later. energized. As a result, the plunger 22 is positioned in contact with the bottom wall of the guide pipe 16 (the position shown in FIGS. 2 and 3; this position of the plunger 22 is hereinafter referred to as the "non-operating position"). called). Although the details will be described later, when the solenoid 10 is actuated, the plunger 22 is raised from the non-actuated position (the position shown in FIG. 10B). ”).

Further, an operating shaft portion 22D is formed at the upper end portion of the plunger 22. The operating shaft portion 22D is formed in a cylindrical shape with a diameter smaller than that of the plunger body 22A and protrudes upward from the plunger body 22A.

<Regarding the coil base assembly 26>
The coil base assembly 26 includes a bobbin 28 , a terminal base 32 , a yoke 44 as a “partition wall”, and a diaphragm 46 .

[About the bobbin 28]
The bobbin 28 is made of an insulating material (resin material), and is formed in a substantially cylindrical shape with an axial direction extending in the vertical direction. A bobbin 28 is housed inside the upper housing portion 12U and arranged above the plunger main body 22A and radially outside the return spring 24 . This allows the plunger 22 to move within the bobbin 28 between a non-actuated position and an actuated position. When the bobbin 28 is accommodated in the upper housing portion 12U, the lower surface of the bobbin 28 is arranged adjacent to the bottom wall of the upper housing portion 12U.

A coil housing recess 28A that opens radially outward is formed in the outer peripheral portion of the bobbin 28 except for the upper end portion and the lower end portion. formed. A suction coil 30A and a holding coil 30B as "coils" made of copper wire are wound in the coil housing recess 28A. One ends of the attraction coil 30A and the holding coil 30B are connected to each other and grounded. The other end of the attraction coil 30A is connected to a switch terminal 40, which will be described later, and the other end of the holding coil 30B is connected to a first power supply terminal 34, which will be described later.

A pair of fixed bosses 28B are formed at the upper end of the bobbin 28. As shown in FIG. The fixed boss 28B is formed in a generally cylindrical shape that opens upward, is arranged along the first reference line L1, and is arranged at a symmetrical position in the first direction with respect to the second reference line L2. ing. A female threaded portion is formed on the inner peripheral surface of the fixed boss 28B.

Further, a first groove 28C is formed in the lower surface of the bobbin 28 on the inner peripheral side. The first groove 28</b>C is formed in a concave shape that is open downward, extends along the circumferential direction of the bobbin 28 , and is formed along the entire circumference of the bobbin 28 . The first groove 28C is closed by the bottom wall of the upper housing portion 12U. A second groove 28D is formed on the upper surface of the bobbin 28 on the inner peripheral side. The second groove 28</b>D is formed in an upwardly open concave shape, extends along the circumferential direction of the bobbin 28 , and is formed along the entire circumference of the bobbin 28 .

[About terminal base 32]
As shown in FIGS. 2 to 5, the terminal base 32 is made of an insulating material (resin material), and is formed in a substantially disc shape with its plate thickness extending in the vertical direction. A terminal base 32 is arranged above the bobbin 28 and is fitted into the upper end portion of the upper housing portion 12U. Specifically, the outer peripheral portion of the terminal base 32 is arranged between the stepped portion 12A of the housing 12 and the fixed flange portion 12B. A pair of mounting holes 32A are formed through the terminal base 32 in the vertical direction. The terminal base 32 is fixed to the bobbin 28 by inserting the base fixing screw S1 into the mounting hole 32A from above and screwing it into the fixing boss 28B of the bobbin 28 .

A contact housing portion 32B for housing a contact assembly 52, which will be described later, is integrally formed in the central portion of the terminal base 32. As shown in FIG. The contact housing portion 32B is formed in a cylindrical shape protruding upward from the terminal base 32 and extends along a direction that is inclined with respect to the first direction in plan view. Specifically, in a plan view, the contact housing portion 32B extends along an inclined reference line L3, which is an imaginary line passing through the axis AL and inclined at an acute angle counterclockwise with respect to the first reference line L1. (see FIG. 5(A)). In the following description, the direction along the tilt reference line L3 in plan view is referred to as the tilt direction. Further, the contact housing portion 32B is formed in a substantially rectangular tubular shape in plan view, with the longitudinal direction being the direction of inclination and the width direction being the direction orthogonal to the direction of inclination. An insertion hole 32C is formed through the central portion of the terminal base 32, and the insertion hole 32C is arranged coaxially with the axis AL.

As shown in FIGS. 4 and 5, the terminal base 32 is integrally formed with a first power supply terminal 34, a second power supply terminal 36, and a switch terminal 40 by insert molding. , is composed of a metal plate.

The first power supply terminal 34 is formed in a substantially elongated plate shape, and the width of the contact housing portion 32B is larger than the portion of the contact housing portion 32B on one side of the contact housing portion 32B in the inclination direction (arrow G direction side in FIGS. 4 and 5). It is arranged on one side of the direction (direction of arrow J in FIG. 5). The first power supply terminal 34 is bent into a generally inverted U shape that opens upward, and a longitudinal middle portion of the first power supply terminal 34 is embedded in the terminal base 32 . One end portion of the first power supply terminal 34 is configured as a first power supply terminal portion 34A as a “connection terminal portion”, and the first power supply terminal portion 34A protrudes upward from the terminal base 32 . The first power supply terminal portion 34A is arranged with the width direction of the contact housing portion 32B as the plate thickness direction in plan view. A first terminal groove 34B (see FIG. 4) is formed at the tip (upper end) of the first power supply terminal portion 34A. When viewed from the direction, it is formed in a substantially C shape opened to the other side of the inclination direction (arrow H direction side in FIG. 4). On the other hand, the other end portion of the first power supply terminal 34 is configured as a coil side terminal portion 34C, and the coil side terminal portion 34C protrudes upward from the terminal base 32 . The coil-side terminal portion 34C is arranged with the inclination direction as the plate thickness direction.

The second power supply terminal 36 is formed in a substantially L-shaped plate shape, and is arranged on the other side in the tilt direction with respect to the axis AL. A base end portion of the second power supply terminal 36 is embedded in a portion of the contact housing portion 32B on the other side in the inclination direction. The base end portion of the second power supply terminal 36 is exposed upward inside the contact housing portion 32B. A metal fixed contact 38 is provided at the base end of the second power supply terminal 36 . The fixed contact 38 is formed in a substantially disc shape and fixed to the second power supply terminal 36 by caulking or the like. The fixed contact 38 protrudes upward from the base end portion of the second power supply terminal 36 and is exposed upward in the contact housing portion 32B. On the other hand, the tip portion of the second power supply terminal 36 is configured as a second power supply terminal portion 36A as a "connection terminal portion", and the second power supply terminal portion 36A is located on the other side in the width direction of the contact housing portion 32B (Fig. 5 in the direction of the arrow K), it protrudes upward from the terminal base 32 . In addition, the second power supply terminal portion 36A is formed in the same shape as the first power supply terminal portion 34A, and is arranged at a point-symmetrical position with respect to the axis AL in plan view. That is, a second terminal groove 36B (see FIG. 4) is formed at the tip (upper end) of the second power supply terminal portion 36A. When viewed from the direction, it is formed in a substantially C shape that is open to one side in the inclination direction.

The switch terminal 40 is formed in a substantially elongated plate shape along the first direction, is arranged on one side in the second direction with respect to the first reference line L1 in plan view, and is embedded in the terminal base 32 . . The switch terminal 40 is exposed upward inside the contact housing portion 32B, and one end portion of the switch terminal 40 is arranged in a portion of the contact housing portion 32B on one side in the inclination direction. A metal fixed contact 42 is provided at one end of the switch terminal 40 . This fixed contact 42 is configured in the same manner as the fixed contact 38 of the second power supply terminal 36 . That is, the fixed contact 42 is formed in a substantially disk shape and fixed to one end of the switch terminal 40 by caulking or the like. The fixed contact 42 protrudes upward from the switch terminal 40 and is exposed upward in one end of the contact housing portion 32B. In addition, the fixed contacts 38 and the fixed contacts 42 are arranged at positions that are point-symmetrical with respect to the axis AL in a plan view. On the other hand, the other end of the switch terminal 40 is configured as a coil side terminal 40A. The coil-side terminal 40A is bent upward and protrudes upward from the terminal base 32 on one side in the width direction of the contact housing portion 32B. Further, the coil-side terminals 40A are arranged with the width direction of the contact housing portion 32B as the plate thickness direction.

As shown in FIG. 5A, a pair of slits 32D and 32E are formed in the outer peripheral portion of the terminal base 32 on one side in the width direction of the contact housing portion 32B with respect to the axis AL. The slits 32D and 32E are arranged side by side in the direction of inclination. The slits 32D and 32E extend along the width direction of the contact housing portion 32B and open to one side in the width direction of the contact housing portion 32B. A portion of the other end of the holding coil 30B is arranged in one of the slits 32D, and the other end of the holding coil 30B is soldered to the coil-side terminal portion 34C of the first power supply terminal 34. . Also, the other end portion of the attraction coil 30A is disposed in the other slit 32E, and the other end portion of the attraction coil 30A is soldered to the coil side terminal 40A of the switch terminal 40. .

As shown in FIG. 10A, the terminal base 32 has a first concave portion 32F that opens downward at the center of the lower surface. The first recess 32F is formed in a circular shape with a diameter larger than that of the insertion hole 32C when viewed from below, and is arranged coaxially with the axis AL. A second recess 32G that opens downward is formed in the center of the top surface of the first recess 32F. The second recess 32G is formed in a circular shape with a diameter larger than that of the insertion hole 32C when viewed from below, and is arranged coaxially with the axis AL. Thereby, the inside of the contact receiving portion 32B and the inside of the second recess 32G are communicated with each other through the insertion hole 32C. Further, a contact portion 32H projecting downward is formed on the top surface of the first recess portion 32F at the edge portion on the inner peripheral side. The contact portion 32H is formed in a ring shape (annular shape) when viewed from below, and is formed in a substantially semicircular shape protruding downward when viewed in vertical cross section.

[About the yoke 44]
As shown in FIGS. 2, 3, and 6, the yoke 44 is made of metal and has a substantially disk-like shape with its plate thickness extending in the vertical direction. First cutouts 44A are formed at both ends in the first direction on the outer periphery of the yoke 44, respectively. The first notch 44A is formed in a substantially U-shape that opens outward in the radial direction of the yoke 44 in a plan view. A yoke 44 is arranged between the bobbin 28 and the terminal base 32 and fixed to the bobbin 28 and the terminal base 32 . Specifically, the fixing boss 28B of the bobbin 28 is fitted into the first notch 44A of the yoke 44 from below, and the yoke 44 is vertically sandwiched between the bobbin 28 and the terminal base 32. As shown in FIG. Thereby, the metal yoke 44 is arranged to cover the upper surface of the resin bobbin 28 , and the second groove 28</b>D of the bobbin 28 is closed by the yoke 44 . Further, when the coil base assembly 26 is housed in the housing 12 , the outer peripheral portion of the yoke 44 is in contact with the upper surface of the stepped portion 12</b>A of the housing 12 . Thereby, the inside of the housing 12 is vertically partitioned by the yoke 44 .

A housing recess 44B that opens upward is formed in the center of the upper surface of the yoke 44, and the housing recess 44B is formed in a circular shape in a plan view. The diameter of the accommodation recess 44B substantially matches the diameter of the first recess 32F of the terminal base 32, and the accommodation recess 44B and the first recess 32F are arranged to face each other in the vertical direction. As a result, the interior of the contact receiving portion 32B of the terminal base 32 and the interior of the receiving recess 44B communicate with each other through the insertion hole 32C and the second recess 32G. A communication hole 44C is formed through the bottom surface of the housing recess 44B, and the communication hole 44C is arranged coaxially with the axis AL. As a result, the interior of the accommodation recess 44B and the interior of the bobbin 28 are communicated with each other through the communication hole 44C. When the plunger 22 is raised to the operating position, the operating shaft portion 22D of the plunger 22 is inserted through the communication hole 44C and protrudes into the housing recess 44B.

As shown in FIG. 6A, a pair of second notches 44D and 44E are formed on the outer periphery of the yoke 44 at positions corresponding to the slits 32D and 32E of the terminal base 32 described above. Similar to the slits 32D and 32E of the terminal base 32, the second notches 44D and 44E extend in a direction orthogonal to the tilt direction in plan view. The other end portion of the holding coil 30B is inserted into the second notch portion 44D, and the other end portion of the attraction coil 30A is inserted into the second notch portion 44E.

As shown in FIG. 6(B), the outer peripheral portion of the yoke 44 is formed with a third cutout portion 44F at the end portion on the other side in the second direction. , and is formed in a substantially trapezoidal shape that is open radially outward of the yoke 44 . A ground terminal 45 made of metal is provided on the upper surface of the yoke 44 in the vicinity of the third notch 44F. The ground terminal 45 is formed in a substantially elongated plate-like shape with the vertical direction as the plate thickness direction and the longitudinal direction as the circumferential direction of the yoke 44 , and is curved along the circumferential direction of the yoke 44 in a plan view. One end of the ground terminal 45 is fixed to the upper surface of the yoke 44 by caulking or the like. In addition, a crank-shaped bent portion that is one step downward is formed in the middle portion of the ground terminal 45 in the longitudinal direction, and the other end portion of the ground terminal 45 is arranged inside the third notch portion 44F. there is The other end of the ground terminal 45 is connected to one end of the attraction coil 30A or the holding coil 30B via a harness. Further, as described above, the outer peripheral portion of the yoke 44 is in contact with the stepped portion 12A of the housing 12 . Therefore, one end of the attraction coil 30A or the holding coil 30B is grounded to the vehicle body via the ground terminal 45, the yoke 44, and the housing 12. As shown in FIG.

[Regarding the diaphragm 46]
As shown in FIG. 10A, the diaphragm 46 is made of an elastic material such as rubber. Further, the diaphragm 46 is formed in a substantially circular sheet shape with the vertical direction as the thickness direction, and the radial intermediate portion of the diaphragm 46 protrudes upward. Specifically, the diaphragm 46 includes a ring-shaped fixed portion 46A that constitutes the outer peripheral portion of the diaphragm 46, a disk-shaped pressing portion 46B that constitutes the central portion of the diaphragm 46, and a radial intermediate portion of the diaphragm 46. and a bellows portion 46C as a "deformable portion". The thickness of the bellows portion 46C is set thinner than the thicknesses of the fixing portion 46A and the pressing portion 46B.

The diameter of the diaphragm 46 is set slightly smaller than the diameters of the first recess 32</b>F of the terminal base 32 and the diameter of the accommodation recess 44</b>B of the yoke 44 . The diaphragm 46 is accommodated in the accommodation recess 44B, and the fixing portion 46A is vertically sandwiched between the top surface of the first recess 32F and the bottom surface of the accommodation recess 44B. Thereby, the diaphragm 46 is fixed by the terminal base 32 and the yoke 44, and the coil base assembly 26 is unitized. Further, the communication hole 44C of the yoke 44 is closed by the diaphragm 46. As shown in FIG. Therefore, the diaphragm 46 seals the communication hole 44C of the yoke 44 and the insertion hole 32C of the terminal base 32. As shown in FIG. That is, the diaphragm 46 seals the interior of the bobbin 28 in which the plunger 22 is arranged and the interior of the contact housing portion 32B of the terminal base 32 .

The bellows portion 46C extends radially inward of the diaphragm 46 from the lower portion of the fixing portion 46A, and is curved in an arcuate shape that protrudes upward in a vertical cross-sectional view. In addition, the outer peripheral portion (diameter direction outer portion) of the bellows portion 46C is arranged close to the lower side of the contact portion 32H of the terminal base 32, and the top portion of the bellows portion 46C is located near the second concave portion of the terminal base 32. 32G.

The pressing portion 46B is connected to the inner peripheral end portion (diameter direction inner end portion) of the bellows portion 46C and protrudes downward from the bellows portion 46C. The pressing portion 46B is arranged coaxially with the axis AL, and the lower surface of the pressing portion 46B is arranged flush with the lower surface of the fixed portion 46A. Also, the diameter of the pressing portion 46B is set smaller than the diameter of the operating shaft portion 22D of the plunger 22 . When the plunger 22 rises from the non-operating position to the operating position, the pressing portion 46B is pushed upward by the operating shaft portion 22D of the plunger 22, and the bellows portion 46C is elastically deformed. Further, when the bellows portion 46C is elastically deformed, the outer peripheral portion of the bellows portion 46C is configured to contact the contact portion 32H of the terminal base 32 (see FIG. 10B).

(Regarding contact mechanism 50)
As shown in FIGS. 2 to 4, the contact mechanism 50 includes a contact assembly 52 as a "contact member", a contact spring 60 (in a broad sense, an element grasped as a "biasing member"), is composed of

<Contact Assy 52 and Contact Spring 60>
The contact assembly 52 includes a contact base 54 and a contact plate 56. As shown in FIG. In addition, the outer shape of the contact assembly 52 is similar to the contact housing portion 32B of the terminal base 32 in plan view, and the contact assembly 52 moves relatively vertically within the contact housing portion 32B of the terminal base 32. accommodated as possible.

The contact base 54 is made of a resin material. The contact base 54 is formed in a bottomed, stepped cylindrical shape that opens upward, and is arranged coaxially with the axis AL. A contact spring 60 configured as a compression coil spring is housed in the upper portion of the contact base 54 . The lower end of the contact spring 60 is locked to the contact base 54, and the upper end of the contact spring 60 is locked by a cover 62, which will be described later. ) is biased downward. Thereby, the contact assembly 52 is arranged at the connection position shown in FIGS. At the connection position of the contact assembly 52, the upper end of the contact base 54 slightly protrudes upward from the upper end of the contact receiving portion 32B of the terminal base 32. As shown in FIG.

A lower portion of the contact base 54 is configured as an operating protrusion 54A, and the operating protrusion 54A is formed in a bottomed cylindrical shape that opens upward. The operating protrusion 54A is inserted into the insertion hole 32C of the terminal base 32 so as to be relatively movable in the vertical direction. At the connection position of the contact assembly 52, the lower end of the operating projection 54A is arranged in the second recess 32G of the terminal base 32, and the lower surface of the operating projection 54A contacts the upper surface of the pressing portion 46B of the diaphragm 46. in contact with

The contact plate 56 is made of a metal plate. The contact plate 56 is formed in a substantially rectangular plate shape with the thickness direction extending in the vertical direction, and the longitudinal middle portion of the contact plate 56 is formed integrally with the contact base 54 by insert molding or the like. Specifically, one end of the contact plate 56 extends from the lower end of the upper portion of the contact base 54 in one direction of inclination, and the other end of the contact plate 56 extends from the lower end of the upper portion of the contact base 54 in the direction of inclination. It extends to the other side.

Metal movable contacts 58 are provided at both ends of the contact plate 56 in the longitudinal direction. The movable contact 58 is formed in a substantially disc shape, fixed to the contact plate 56 by caulking or the like, and protrudes below the contact plate 56 . The contact spring 60 described above is arranged between the pair of movable contacts 58 in plan view. In other words, the pair of movable contacts 58 are arranged at symmetrical positions in the tilt direction with respect to the center of the contact spring 60 (that is, the axis AL). One movable contact 58 is vertically opposed to the fixed contact 42 of the switch terminal 40 , and the other movable contact 58 is vertically opposed to the fixed contact 38 of the second power supply terminal 36 . . Further, at the connection position of the contact assembly 52, the biasing force of the contact spring 60 presses the movable contact 58 against the fixed contacts 38, 42. As shown in FIG. Thereby, the second power supply terminal 36 and the switch terminal 40 are electrically connected by the contact assembly 52 at the connection position of the contact assembly 52 .

Further, although the details will be described later, in the operating position of the plunger 22, the contact assembly 52 is pushed upward by the operating shaft portion 22D of the plunger 22 and lifted from the connecting position (FIG. 10(B)). , and hereinafter, this position in the contact assembly 52 is referred to as a "non-connection position"). In the non-connecting position of the contact assembly 52, the movable contact 58 is separated upward from the fixed contacts 38, 42, so that the pressure contact state between the movable contact 58 and the fixed contacts 38, 42 is released. . That is, in the non-connecting position of the contact assembly 52, the connection between the second power supply terminal 36 and the switch terminal 40 is cut off.

(Regarding the cover 62)
The cover 62 is made of an insulating material (resin material). The cover 62 is formed in a bottomed cylindrical shape that opens downward and is arranged above the terminal base 32 and the contact base 54 . A cover-side flange portion 62A projecting radially outward is formed on the outer peripheral portion of the lower end portion of the cover 62. The cover-side flange portion 62A is formed along the entire circumference of the cover 62 in the circumferential direction. there is The cover-side flange portion 62A is arranged adjacent to the upper side of the outer peripheral portion of the terminal base 32 . Further, the outer peripheral portion of the yoke 44, the outer peripheral portion of the terminal base 32, and the cover-side flange portion 62A are vertically sandwiched by the stepped portion 12A and the fixed flange portion 12B of the housing 12, thereby forming the coil base assembly 26 of the solenoid body 20. and a cover 62 are secured to the housing 12 .

At the center of the top wall of the cover 62, a supporting portion 62B projecting upward is formed. The support portion 62B is formed in a columnar shape whose axial direction is the vertical direction, and is arranged coaxially with the axis AL. A guide groove 62C is formed in the lower surface of the top wall of the cover 62 at a position corresponding to the contact base 54 described above, and the guide groove 62C is formed in a ring shape that opens downward. . The upper end portion of the contact spring 60 is inserted into the radially inner portion of the guide groove 62</b>C and locked to the cover 62 . Further, the upper end portion of the contact base 54 is inserted into the radially outer portion of the guide groove 62C. Thus, when the contact assembly 52 moves between the connected position and the non-connected position, the movement of the contact assembly 52 is guided by the guide groove 62C.

A pair of terminal recesses 62D are formed on the upper surface of the cover 62 on the radially outer side of the support portion 62B. The terminal concave portion 62D is formed in a concave shape that is one step lower than the upper surface of the cover 62, and is formed in a substantially fan shape in a plan view. The terminal recess 62</b>D is open radially outward of the cover 62 . Furthermore, the pair of terminal recesses 62D are arranged on one side in the second direction and the other side in the second direction with respect to the axis AL, and are arranged at positions that are point-symmetrical with respect to the axis AL in a plan view. .

A nut 64 is embedded in the cover 62 at the position of the terminal recess 62D. The nut 64 is formed in a bottomed cylindrical shape that opens upward, and the upper surface of the nut 64 is exposed upward in the terminal recess 62D.

A pair of terminal hole portions 62E are formed through the terminal recess portion 62D of the cover 62 in the vertical direction. The terminal hole portions 62E are arranged at positions corresponding to the first power supply terminal portion 34A and the second power supply terminal portion 36A of the terminal base 32, respectively. The terminal hole portion 62E is formed in a rectangular shape whose longitudinal direction is the inclined direction. is set larger than The first power supply terminal portion 34A and the second power supply terminal portion 36A are respectively inserted into the terminal hole portions 62E from below.

Further, as shown in FIG. 7, the tip portions of the first power supply terminal portion 34A and the second power supply terminal portion 36A are bent at a right angle after being inserted into the terminal hole portion 62E, and are bent at the upper surface of the terminal recess portion 62D. is located adjacent to the Specifically, the tip portion of the first power supply terminal portion 34A is bent toward one side in the width direction of the contact housing portion 32B (not shown in FIG. 7), and the tip portion of the second power supply terminal portion 36A is bent toward the contact housing portion 32B. It is bent to the other side in the width direction of the portion 32B. Also, in this state, the first terminal groove 34B of the first power supply terminal portion 34A is arranged coaxially with one nut 64, and the second terminal groove 36B of the second power supply terminal portion 36A is aligned with the other nut. 64 and coaxially. Furthermore, in this state, the upper surfaces of the tip portions of the first power supply terminal portion 34A and the second power supply terminal portion 36A are arranged slightly above the upper surface of the cover 62 .

On the outer peripheral portion of the cover 62, regulating protrusions 62F are formed radially outward of the pair of nuts 64, respectively. The restricting protrusion 62F protrudes radially outward from the outer peripheral portion of the cover 62, and the lower end portion of the restricting protrusion 62F is connected to the upper surface of the cover-side flange portion 62A.

(Regarding connector 70)
As shown in FIGS. 2, 3, and 7-9, connector 70 is positioned above cover 62 and secured to cover 62 . The connector 70 includes a connector body 72 and a pair of connector terminals 78. The connector terminals 78 are integrally formed with the connector body 72 by insert molding.

The connector main body 72 is made of a resin material. The connector main body 72 includes a connector base portion 74 assembled to the cover 62, and a connector portion 76 projecting from the connector base portion 74 toward one side in the first direction (arrow C direction side in FIGS. 2 and 7). consists of

The connector base portion 74 is formed in a substantially bottomed cylindrical shape that is open downward. A circular support hole 74A is vertically formed through the central portion of the top wall of the connector base portion 74, and the support hole 74A is arranged coaxially with the axis AL. The support portion 62B of the cover 62 is inserted into the support hole 74A from below. As a result, the connector 70 is rotatably supported by the support portion 62B in a state before the connector 70 is fixed to the cover 62 (hereinafter, this state is referred to as a "temporarily assembled state"). That is, in the temporarily assembled state of the connector 70, the connector 70 is configured to be rotatable relative to the cover 62 about the axis AL.

As shown in FIG. 8A, the side walls of the connector base portion 74 are arranged radially outward of the outer peripheral surface of the cover 62, and extend from the first direction one side and the first direction other side of the connector base portion 74. As shown in FIG. is arranged adjacent to the outer peripheral surface of the cover 62 in the radial direction outside. A side wall of the connector base portion 74 on one side in the first direction extends downward and on the one side in the first direction more than other portions.

Portions of the sidewall of the connector base portion 74 on one side in the second direction and on the other side in the second direction are raised radially outward and extend in the circumferential direction of the connector base portion 74 . As a result, the inner peripheral surfaces of the connector base portion 74 on one side in the second direction and on the other side in the second direction are spaced apart radially outward from the outer peripheral surface of the cover 62 . That is, the inner peripheral surfaces of the connector base portion 74 on one side in the second direction and on the other side in the second direction are provided with restricting grooves 74B that open radially inward. extending along the circumferential direction of the The restricting protrusion 62F of the cover 62 is arranged in the restricting groove 74B.

Here, in the temporarily assembled state of the connector 70 , when the connector 70 is rotated in one direction of rotation (clockwise) about the axis AL in a plan view, the end of the restricting groove 74 B on the other side in the circumferential direction moves toward the cover 62 . Rotation of the connector 70 on one side in the rotational direction is restricted by abutting on the restricting projection 62F. On the other hand, in the temporarily assembled state of the connector 70 , when the connector 70 is rotated about the axis AL in a plan view in the other rotational direction (counterclockwise), the end of the restricting groove 74 B on the one circumferential side of the cover 62 Rotation of the connector 70 on the other side in the rotational direction is restricted by coming into contact with the restricting projection 62F. That is, in the temporarily assembled state of the connector 70, the connector 70 is positioned between the first assembly position (the position shown in FIG. 11(A)) and the second assembly position (the position shown in FIG. 11(B)). is rotatable.

As shown in FIGS. 3 and 7, the connector base portion 74 is formed with a pair of terminal groove portions 74C penetrating therethrough in the vertical direction. The pair of terminal grooves 74C are arranged on one side in the second direction and the other side in the second direction with respect to the first reference line L1, and extend in the circumferential direction of the connector base portion 74 in plan view. It is arc-shaped. That is, the pair of terminal groove portions 74C are arranged radially inward of the regulation groove 74B in plan view. In addition, the pair of terminal grooves 74C are arranged at symmetrical positions in the second direction with respect to the first reference line L1.

The connector portion 76 is formed in a substantially elliptical cylindrical shape, and protrudes from the side wall of the connector base portion 74 on the one side in the first direction to the one side in the first direction. An external connector on the vehicle side is fitted to the connector portion 76 .

As shown in FIGS. 2, 7, and 9, the pair of connector terminals 78 is made of a metal plate material and formed in a substantially elongated plate shape extending in the first direction, and vertically extending. The direction is the plate thickness direction. Also, the pair of connector terminals 78 are arranged at symmetrical positions in the second direction with respect to the first reference line L1. One end in the longitudinal direction of the connector terminal 78 is configured as an external connection portion 78A. The external connection portion 78A is arranged inside the connector portion 76 and connected to the external connector fitted to the connector portion 76. there is Further, the longitudinal intermediate portion of the connector terminal 78 is bent upward from the external connection portion 78A into a two-stage crank shape and embedded in the connector base portion 74 .

The other longitudinal end portion of the connector terminal 78 is configured as a power supply connecting portion 78B as a “fixed terminal portion” and is formed integrally with the connector base portion 74 . The power supply connection portion 78B is formed in an arc shape extending along the circumferential direction of the connector base portion 74 in plan view corresponding to the terminal groove portion 74C of the connector base portion 74 . A connection hole 78C is formed through the central portion of the power supply connection portion 78B in the width direction, and the connection hole 78C is formed in an elongated hole shape along the longitudinal direction of the power supply connection portion 78B.

The lower surface of the power supply connecting portion 78B is flush with the lower surface of the top wall of the connector base portion 74 and is exposed downward with respect to the connector base portion 74 . In addition, the upper surface of the power supply connection portion 78B is exposed upward by the terminal groove portion 74C except for the outer peripheral portion.

The power supply connection portion 78B is arranged adjacent to the upper side of the tip end portions of the first power supply terminal portion 34A and the second power supply terminal portion 36A arranged in the terminal recess portion 62D of the cover 62, and is arranged adjacent to the power supply connection portion. 78B and the tip portions of the first power supply terminal portion 34A and the second power supply terminal portion 36A are arranged to face each other in the vertical direction. Furthermore, the connection hole 78C of the power supply connection portion 78B and the first terminal groove 34B of the first power supply terminal portion 34A (the second terminal groove 36B of the second power supply terminal portion 36A) are arranged to overlap each other in plan view. there is Specifically, the longitudinal intermediate portion of the connection hole 78C is arranged to overlap the first terminal groove 34B of the first power supply terminal portion 34A (the second terminal groove 36B of the second power supply terminal portion 36A). Then, the terminal fixing screw S2 is inserted into the connection hole 78C and the first terminal groove 34B of the first power supply terminal portion 34A (into the second terminal groove 36B of the second power supply terminal portion 36A) and screwed into the nut 64. By doing so, the connector 70 is fixed to the cover 62 .

Further, as described above, in the temporarily assembled state of the connector 70, the connector 70 is configured to be rotatable between the first assembly position and the second assembly position. Also, at the first assembly position and the second assembly position of the connector 70, the connection hole 78C of the power supply connection portion 78B and the first terminal groove 34B of the first power supply terminal portion 34A (the second power supply terminal portion 36A 2nd terminal groove|channel 36B) are overlapped by planar view, and are arrange|positioned. Therefore, the assembly position of the connector 70 can be set to any position between the first assembly position and the second assembly position, and the connector 70 can be fixed to the cover 62 (FIG. 11). reference).

Further, as shown in FIG. 8B, in the fixed state of the connector 70, the first power supply terminal portion 34A (the second power supply terminal portion 36A) and the power supply connection portion 78B are connected to each other by the head portion of the terminal fixing screw S2. and a nut 64. In other words, the first power supply terminal portion 34A (the second power supply terminal portion 36A) and the power supply connection portion 78B are crimped by the tightening force of the terminal fixing screw S2. As a result, the external connector and the first power supply terminal 34 and the second power supply terminal 36 are electrically connected by the pair of connector terminals 78, and current is supplied to the attraction coil 30A and the holding coil 30B of the solenoid body 20. It is designed to be

(Regarding mold portion 80)
As shown in FIGS. 1 to 3, the molded portion 80 is made of a resin material. The molded portion 80 covers the outer peripheral portion of the connector base portion 74 of the connector 70 and the outer peripheral portion of the opening of the housing 12 . As a result, the molded portion 80 is inserted into the terminal groove portion 74C of the connector base portion 74, and the terminal fixing screw S2, the power supply connecting portion 78B, and the support hole 74A of the connector 70 are covered with the molded portion 80. Therefore, the opening of the housing 12 is closed while airtightness inside the housing 12 is ensured.

(Effect)
Next, while describing the operation and assembly procedure of the solenoid 10, the action and effect of this embodiment will be described.

<Operation of Solenoid 10>
As shown in FIG. 3, when the solenoid 10 is in a non-operating state, the plunger 22 is arranged at the non-operating position and the contact assembly 52 is arranged at the connecting position. Therefore, the fixed contacts 38 and 42 of the solenoid body 20 and the movable contact 58 of the contact assembly 52 are brought into pressure contact, and the switch terminal 40 and the second power supply terminal 36 are electrically connected. In this state, when a current is supplied from the external connector to the solenoid 10, the attracting coil 30A and the holding coil 30B are energized. As a result, a magnetic field is generated by the attracting coil 30A and the holding coil 30B, and the plunger 22 is attracted upward by this magnetic field. Therefore, the plunger 22 rises from the non-operating position against the biasing force of the return spring 24 .

When the plunger 22 rises from the non-operating position, the operating shaft portion 22D of the plunger 22 is inserted through the communication hole 44C of the yoke 44 and presses the pressing portion 46B of the diaphragm 46 upward. Therefore, the pressing portion 46B is displaced upward while the bellows portion 46C of the diaphragm 46 is elastically deformed. As a result, the actuating protrusion 54A of the contact assembly 52 is pressed by the pressing portion 46B, and the contact assembly 52 moves upward from the connection position against the biasing force of the contact spring 60. As shown in FIG. At this time, the contact assembly 52 moves upward from the connection position while being guided by the contact housing portion 32B of the terminal base 32 and the guide groove 62C of the cover 62 .

Then, as shown in FIG. 10B, the contact assembly 52 reaches the non-connecting position by placing the plunger 22 at the operating position. As a result, the movable contact 58 of the contact assembly 52 is separated upward from the fixed contacts 38, 42, and the pressure contact between the fixed contacts 38, 42 and the movable contact 58 is released. That is, the connection between the second power supply terminal 36 and the switch terminal 40 is cut off. As a result, the power supply to the attracting coil 30A is interrupted and only the holding coil 30B is powered. Therefore, the magnetic field generated by the holding coil 30B maintains the state of the plunger 22 in the operating position, and holds the contact assembly 52 in the non-connecting position.

On the other hand, when the current supply from the external connector to the connector terminal 78 is cut off, the current supply to the first power supply terminal 34 and the second power supply terminal 36 is cut off. As a result, no magnetic field is generated in the holding coil 30B. Therefore, the plunger 22 descends from the operating position by the biasing force of the return spring 24 and returns to the non-operating position. At this time, the contact assembly 52 is lowered from the non-connected position by the biasing force of the contact spring 60 and returns to the connected position. As a result, as shown in FIG. 3, the fixed contacts 38, 42 and the movable contact 58 are brought into pressure contact again, and the second power supply terminal 36 and the switch terminal 40 are connected again.

<Assembly Procedure for Solenoid 10>
In assembling the solenoid 10 , first, the guide pipe 16 is fitted inside the lower housing portion 12</b>L of the housing 12 and the plunger 22 is inserted inside the guide pipe 16 . Then, the return spring 24 is attached to the plunger main body 22A of the plunger 22. - 特許庁In this state, the coil base assembly 26 is inserted inside the upper housing portion 12U of the housing 12 . Specifically, while inserting the upper portion of the plunger body 22A and the return spring 24 into the bobbin 28, the coil base assembly 26 is inserted into the upper housing portion 12U. As a result, the outer peripheral portion of the yoke 44 is placed above the stepped portion 12A of the housing 12, and the interior of the upper housing portion 12U is vertically partitioned. Also, the bobbin 28 is accommodated in the lower portion of the upper housing portion 12U that is divided vertically.

Next, the contact assembly 52 is accommodated inside the contact accommodating portion 32B of the terminal base 32 from above, and the contact spring 60 is accommodated inside the contact base 54 from above. In this state, the cover 62 is attached to the upper side of the terminal base 32. As shown in FIG. Specifically, while inserting the upper end of the contact spring 60 into the guide groove 62C of the cover 62, the cover-side flange 62A of the cover 62 is arranged adjacent to the outer peripheral portion of the terminal base 32 above. Also, at this time, the first power supply terminal portion 34A and the second power supply terminal portion 36A of the terminal base 32 are inserted into the terminal hole portion 62E of the cover 62 from below.

In this state, the opening end of the housing 12 is bent to form the fixed flange portion 12B. As a result, the cover-side flange portion 62A of the cover 62, the outer peripheral portion of the terminal base 32, and the outer peripheral portion of the yoke 44 are vertically sandwiched between the fixed flange portion 12B and the stepped portion 12A of the housing 12, thereby A cover 62 is secured to the housing 12 .

After fixing the cover 62 to the housing 12, the tip portions of the first power supply terminal portion 34A and the second power supply terminal portion 36A of the terminal base 32 are bent at right angles. As a result, the tip portions of the first power supply terminal portion 34A and the second power supply terminal portion 36A are arranged in the terminal recess 62D of the cover 62 and above the nut 64 (see FIG. 7).

Next, the connector 70 is placed above the cover 62 and the support portion 62B of the cover 62 is inserted into the support hole 74A of the connector 70 . As a result, the connector 70 is temporarily assembled while being supported by the cover 62 . That is, as shown in FIGS. 11A and 11B, the cover 62 is rotatable between the first assembly position and the second assembly position. Then, the position of the connector 70 in the circumferential direction of the housing 12 is adjusted according to the specifications of the solenoid 10 . In this embodiment, the position of the connector portion 76 is a position protruding from the housing 12 to one side in the first direction, so the position of the connector 70 with respect to the housing 12 is adjusted to this position. Then, the terminal fixing screw S2 is inserted into the connection hole 78C of the connector terminal 78 and screwed into the nut 64 of the cover 62. As shown in FIG. As a result, the power supply connecting portion 78B of the connector terminal 78 is fixed to the cover 62, and the connector 70 is fully assembled.

After fixing the connector 70 to the cover 62, the molded portion 80 is formed by outsert molding. As a result, the molded portion 80 covers the outer periphery of the connector base portion 74 of the connector 70 and the outer periphery of the open end of the housing 12 . As described above, the assembly of the solenoid 10 is completed.

Thus, in the solenoid 10 of the present embodiment, the bobbin 28 is accommodated inside the upper housing portion 12U of the housing 12, and the attracting coil 30A and the holding coil 30B are wound around the bobbin 28. ing. A plunger 22 is arranged inside the bobbin 28 , and a terminal base 32 having a fixed contact 38 is provided above the bobbin 28 . Furthermore, a contact assembly 52 is provided above the fixed contact 38 , and a movable contact 58 of the contact assembly 52 is in contact with the fixed contacts 38 and 42 .

Here, a yoke 44 is provided between the bobbin 28 and the terminal base 32, and the yoke 44 vertically partitions the interior of the upper housing portion 12U. The yoke 44 also has a housing recess 44B that opens upward, and a communication hole 44C that communicates the interior of the bobbin 28 with the housing recess 44B. A diaphragm 46 is provided in the accommodation recess 44B, and the communication hole 44C is closed by the diaphragm 46. As shown in FIG. As a result, the waterproofness of the fixed contacts 38 and 42 and the movable contact 58 against liquids such as water and oil can be ensured while downsizing the diaphragm 46 .

That is, in the upper housing portion 12U of the solenoid 10, in order to accommodate the components of the solenoid 10 such as the plunger 22, the attraction coil 30A, the holding coil 30B, and the bobbin 28, the inner diameter of the upper housing portion 12U is set to the bobbin. 28 outside diameter. For this reason, in order to ensure waterproofness of the fixed contacts 38, 42 and the movable contact 58 against liquid, it is assumed that the inside of the upper housing portion 12U is divided by the diaphragm 46 alone into the space in which the bobbin 28 and the like are arranged and the fixed contact. If the space is divided into a space in which the terminal base 32 having 38 and 42 is arranged, the diameter of the diaphragm 46 must be increased to match the inner diameter of the upper housing portion 12 . Therefore, the size of the diaphragm 46 tends to be increased.

On the other hand, in the solenoid 10 of the present embodiment, the yoke 44 is provided between the bobbin 28 and the terminal base 32 as described above. are divided into As a result, the bobbin 28 and the like can be accommodated in the upper housing portion 12 while the inside of the upper housing portion 12 is vertically partitioned by the yoke 44 . In addition, as described above, the yoke 44 has the housing recess 44B that opens upward, and the communication hole 44C that communicates the interior of the bobbin 28 with the housing recess 44B. A diaphragm 46 is provided in the accommodation recess 44B, and the communication hole 44C is closed by the diaphragm 46. As shown in FIG. As a result, the diaphragm 46 can prevent liquid (foreign matter) from entering the stationary contacts 38 and 42 of the terminal base 32 from the communicating hole 44C through which the plunger 22 is inserted during operation. That is, the waterproofness of the fixed contacts 38 and 42 and the movable contact 58 against liquid can be ensured without enlarging the outer diameter of the diaphragm 46 in accordance with the inner diameter of the upper housing portion 12U. As described above, according to the solenoid 10 of the present embodiment, the waterproofness of the fixed contacts 38 and 42 and the movable contact 58 against liquid can be ensured while the size of the diaphragm 46 is reduced.

The bobbin 28 is made of resin, and the yoke 44 is made of metal. Furthermore, the yoke 44 is arranged above the bobbin 28 and is formed in a disc shape with the plate thickness direction extending in the vertical direction. Therefore, the magnetic flux generated by the attracting coil 30A and the holding coil 30B when the solenoid 10 is actuated can be collected by the yoke 44. FIG. As a result, the yoke 44 for partitioning the upper housing portion 12U in the vertical direction can be utilized to effectively increase the attraction force and holding force for the plunger 22 when the solenoid 10 is actuated.

The yoke 44 and the housing 12 are made of metal, and the outer peripheral portion of the yoke 44 abuts the housing 12 . Also, the yoke 44 is provided with a ground terminal 45 . The ground terminal 45 is connected to one end of the attraction coil 30A and the holding coil 30B, and one end of the attraction coil 30A and the holding coil 30B is connected via the ground terminal 45, the yoke 44, and the housing 12. grounded. As a result, one end of the attraction coil 30A and the holding coil 30B can be grounded by utilizing the yoke 44 for partitioning the interior of the upper housing portion 12 in the vertical direction.

Further, the terminal base 32 is formed with a contact receiving portion 32B opened upward. A contact assembly 52 is housed in the contact housing portion 32B, and fixed contacts 38 and 42 are arranged on the bottom surface of the contact housing portion 32B. A cover 62 closes the opening of the contact housing portion 32B. Thus, the cover 62 can prevent liquid (foreign matter) from entering the contact housing portion 32B from the opening side of the contact housing portion 32B. Further, an insertion hole 32C is formed in the bottom surface of the contact housing portion 32B to communicate the interior of the contact housing portion 32B and the interior of the housing recess 44B of the yoke 44. 32C is inserted. Therefore, the movable contact 58 can be brought into contact with and separated from the fixed contacts 38 and 42 inside the contact receiving portion 32B while the insertion hole 32C of the contact receiving portion 32B is closed by the operating projection 54A. As described above, the waterproofness of the fixed contacts 38, 42 and the movable contact 58 against liquid can be effectively ensured.

A yoke 44 is sandwiched between the bobbin 28 and the terminal base 32 and fixed to both. Furthermore, the outer peripheral portion of the diaphragm 46 is sandwiched between the terminal base 32 and the yoke 44 and fixed to both. Therefore, the coil base assembly 26 (bobbin 28, yoke 44, terminal base 32, and diaphragm 46) can be assembled to the housing 12 as a unit. As a result, ease of assembly of the solenoid 10 can be improved.

After the cover 62 is attached to the housing 12, the opening of the housing 12 is bent to form the fixed flange portion 12B. Then, the cover-side flange portion 62A of the cover 62, the outer peripheral portion of the terminal base 32, and the outer peripheral portion of the yoke 44 are vertically sandwiched by the fixed flange portion 12B and the step portion 12A of the housing 12, so that the solenoid body 20 (coil base Assy 26 ) and cover 62 are secured to housing 12 . Accordingly, since the cover 62 is fixed to the housing 12 when the connector 70 is assembled, the assembling property of the connector 70 to the cover 62 can be improved.

In addition, the diaphragm 46 includes a fixed portion 46A forming an outer peripheral portion of the diaphragm 46, a pressing portion 46B forming a central portion of the diaphragm 46, and a bellows portion 46C provided between the fixing portion 46A and the pressing portion 46B. , is composed of A ring-shaped abutting portion 32H is formed on the lower surface of the terminal base 32 so as to protrude downward. When the plunger 22 presses the pressing portion 46B when the solenoid 10 is actuated, the bellows portion 46C is elastically deformed and comes into contact with the contact portion 32H. As a result, when the bellows portion 46C is elastically deformed, it is possible to prevent an excessive tensile force from acting on the fixing portion 46A of the diaphragm 46. Therefore, the fixing state of the fixing portion 46A (diaphragm 46) can be favorably maintained.

The contact portion 32H protrudes downward and is formed in a ring shape along the circumferential direction of the first recess portion 32F of the terminal base 32 when viewed from below. Therefore, even if liquid (foreign matter) enters from between the fixing portion 46A of the diaphragm 46 and the first recessed portion 32F of the terminal base 32 to the first recessed portion 32F side, the infiltrated liquid (foreign matter) is brought into contact with the first recessed portion 32F. It can be blocked by the portion 32H. Thus, the contact portion 32H can prevent liquid (foreign matter) that has entered the first recess 32F from entering the insertion hole 32C of the terminal base 32 along the top surface of the first recess 32F.

A support portion 62B is formed on the top wall of the cover 62, and the support hole 74A of the connector 70 is rotatably supported by the support portion 62B in the temporarily assembled state. Further, the other end portion of the connector terminal 78 of the connector 70 is provided with a power feeding connection portion 78B fixed to the first power feeding terminal portion 34A and the second power feeding terminal portion 36A of the terminal base 32 with a terminal fixing screw S2. The power supply connecting portion 78B extends in the circumferential direction of the housing 12. As shown in FIG. As a result, in the provisionally assembled state of the connector 70 , the assembly position of the connector 70 in the circumferential direction of the housing 12 can be changed.

A molded portion 80 is provided on the outer peripheral portion of the solenoid 10 . The molded portion 80 covers the outer peripheral portion of the connector base portion 74 of the connector 70 and the outer peripheral portion of the opening of the housing 12, and also covers the terminal fixing screw S2, the power supply connection portion 78B, and the support hole 74A of the connector 70. covered. As a result, intrusion of liquid (foreign matter) into the housing 12 can be suppressed even when the connector 70 is temporarily assembled in a structure that allows the assembly position of the connector 70 to be changed.

A first groove 28C opened downward is formed in the lower surface of the bobbin 28, and the first groove 28C is closed by the bottom wall of the upper housing portion 12U. Therefore, even if liquid such as water or oil enters between the bobbin 28 and the bottom wall of the upper housing portion 12U due to capillary action or the like, the liquid that has entered is retained by the first groove 28C, Liquid can be suppressed from entering the yoke 44 side.

A second groove 28</b>D opened upward is formed in the upper surface of the bobbin 28 , and the second groove 28</b>D is closed by a yoke 44 . Therefore, even if liquid such as water or oil enters between the bobbin 28 and the yoke 44 due to capillary action or the like, the infiltrated liquid is retained by the second groove 28D, and the liquid does not enter the yoke 44. Intrusion between the terminal base 32 and the terminal base 32 can be suppressed.

10 Solenoid 12 Housing 12L Lower housing portion (small diameter portion)
12U upper housing part (large diameter part)
12A step portion 12B fixed flange portion 12C opening hole 22 plunger 28 bobbin 30A suction coil (coil)
30B holding coil (coil)
32 Terminal base 32B Contact housing portion 32C Insertion hole 32H Contact portion 34A First feed terminal portion (connection terminal portion)
36A second power supply terminal part (connection terminal part)
38 fixed contact 42 fixed contact 44 yoke (partition wall)
44B Housing recess 44C Communication hole 45 Ground terminal 46 Diaphragm 46A Fixed portion 46B Pressing portion 46C Bellows portion (deformable portion)
52 contact assembly (contact member)
54A Actuating protrusion 58 Movable contact 62 Cover 62B Support portion 70 Connector 72 Connector main body 74A Support hole 78 Connector terminal 78B Power feeding connection portion (fixed terminal portion)
S2 Terminal fixing screw

Claims (8)

A large-diameter portion that is formed in a stepped cylindrical shape that is open to one axial side, and a small-diameter portion that extends from the large-diameter portion to the other axial side and has an opening at the other axial end. a housing configured to include;
a bobbin that is housed inside the large-diameter portion, is formed in a cylindrical shape, and has a coil wound thereon;
a plunger disposed inside the small-diameter portion and the bobbin, protruding from the opening to the other axial side of the housing, and moving to the one axial side of the housing when actuated;
a terminal base provided on one axial side of the housing with respect to the bobbin and having a fixed contact;
a contact member having a movable contact that abuts against the fixed contact on one side in the axial direction of the housing with respect to the fixed contact, and that is moved to the one side in the axial direction of the housing by being actuated;
a cover that closes the opening of the housing;
a connector provided on one axial side of the housing and fixed to the cover;
an accommodation recess provided between the terminal base and the bobbin to partition the inside of the large-diameter portion in the axial direction and open toward the terminal base; a partition wall having a communication hole communicating with the
a diaphragm that is provided inside the housing recess, closes the communication hole, and is elastically deformed by being pressed by the plunger when the plunger is actuated, and operates the contact member;
Solenoid with The bobbin is made of resin,
2. The solenoid according to claim 1, wherein said partition wall is made of metal and formed in a plate shape having a plate thickness direction along the axial direction of said housing. The partition wall and the housing are made of metal, and an outer peripheral portion of the partition wall is in contact with the housing,
A ground terminal is provided on the partition wall,
3. The solenoid according to claim 1, wherein the ground terminal is connected to one end of the coil, and the one end of the coil is grounded to the housing via the ground terminal. The terminal base includes: a contact accommodating portion opened to one axial direction side of the housing and having the fixed contact arranged on the bottom surface; an insertion hole that communicates with the interior of the recess,
The contact member is accommodated in the contact accommodation portion and has an operating projection inserted through the insertion hole,
4. The solenoid according to any one of claims 1 to 3, wherein the contact housing portion is closed by the cover. the terminal base is secured to the bobbin;
5. The dividing wall according to claim 1, wherein the partition wall is sandwiched between the terminal base and the bobbin, and the outer peripheral portion of the diaphragm is sandwiched between the partition wall and the terminal base. solenoid. A stepped portion projecting radially outward is formed on one axial side of the large-diameter portion, and a fixed flange portion bent radially inward is formed on one axial end of the large-diameter portion. is formed and
6. The solenoid according to any one of claims 1 to 5, wherein outer peripheries of said partition wall, said terminal base, and said cover are sandwiched between said stepped portion and said fixed flange portion. The diaphragm is formed in the shape of a circular sheet, and includes a fixed portion that constitutes the outer peripheral portion of the diaphragm and is sandwiched between the terminal base and the partition wall, and a central portion of the diaphragm that is formed by the plunger. a pressing portion to be pressed; and a deformable portion provided between the fixed portion and the pressing portion and elastically deformed when pressed by the plunger;
A ring-shaped abutting portion projecting toward the diaphragm is formed on a surface of the terminal base facing the housing recess,
7. The solenoid according to any one of claims 1 to 6, wherein when the pressing portion of the plunger presses, the elastically deformed outer peripheral portion of the deformable portion contacts the contact portion. A connection terminal connected to the coil is provided on one axial side of the housing with respect to the cover,
the cover has a support portion protruding to one side in the axial direction of the housing,
The connector is
a connector main body having a support hole rotatably assembled to the support portion in a temporarily assembled state before fixing the connector to the cover;
a connector terminal having a fixed terminal portion formed integrally with the connector body and fastened together with the connection terminal portion to the cover by a terminal fixing screw;
consists of
the fixed terminal portion extends in the circumferential direction of the housing to allow a change in the assembly position of the connector in the temporarily assembled state;
The solenoid according to any one of claims 1 to 7, wherein the outer peripheral portion of the housing on the open end side, the terminal fixing screw, the fixed terminal portion, and the support hole are covered with a molded portion. .

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