JP2018195392A - Electromagnetic relay - Google Patents

Abstract

To suppress conduction failure of a contact.SOLUTION: An electromagnetic relay 100 comprises: an electromagnet 2 having a coil bobbin 3; a fixed terminal 1 having a fixed contact; and a movable spring 11 having a movable contact 14. In response to the magnetization and demagnetization of the electromagnet 2, the movable spring 11 moves between a closed position at which the movable contact 14 comes into contact with the fixed contact and an open position at which the movable contact 14 separates from the fixed contact. The fixed terminal 1 has: a contact part 92 including the fixed contact; and a protruding part 93 which protrudes, at a position spaced away from the contact part 92, in the same direction as that of the contact part 92. The coil bobbin 3 has: a housing part 35 which houses the contact part 92; a holding part 36 into which the protruding part 93 is inserted so as to hold the protruding part 93 while making contact with the protruding part 93; and a dividing part 37 which divides the housing part 35 from the holding part 36.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates generally to an electromagnetic relay, and more particularly to an electromagnetic relay that opens and closes a contact in response to excitation and demagnetization of an electromagnet.

  Patent Document 1 describes an electromagnetic switching device that opens and closes contacts according to excitation and demagnetization of an electromagnet. The electromagnetic switching device described in Patent Document 1 includes an electromagnet and a fixed contact terminal. The electromagnet has an exciting coil wound around a bobbin. The fixed contact terminal has a fixed contact at one end, and is attached to the bobbin by inserting and fixing the one end into a pair of recesses provided on the bobbin.

JP 2010-108654 A

  In the electromagnetic switching device (electromagnetic relay) described in Patent Document 1, a fixed contact is provided at the one end of the fixed contact terminal (fixed terminal), and bobbin shavings generated during press-fitting and fixing adhere to the fixed contact. Doing so could cause poor contact conduction.

  This indication is made in view of the above-mentioned subject, and provides the electromagnetic relay which can reduce the conduction failure of a contact.

  The electromagnetic relay according to the first aspect of the present disclosure includes an electromagnet, a fixed terminal, and a movable spring. The electromagnet includes a coil bobbin and a coil wound around the coil bobbin. The fixed terminal has a fixed contact. The movable spring has a movable contact. The movable spring moves between a closed position where the movable contact contacts the fixed contact and an open position where the movable contact separates from the fixed contact in response to excitation and demagnetization of the electromagnet. The fixed terminal has a contact portion and a protrusion. The contact portion includes the fixed contact. The protrusion protrudes in a first direction that is in the same direction as the contact portion at a position away from the contact portion. The coil bobbin includes a storage part, a holding part, and a separation part. The storage portion stores the contact portion. The holding portion holds the protruding portion in a state where the protruding portion is inserted and is in contact with the protruding portion. The separation unit separates the storage unit and the holding unit.

  In the electromagnetic relay according to the second aspect of the present disclosure, in the first aspect, the holding part includes a contact part and a gap part. The contact portion contacts the protrusion on the opening side of the holding portion, which is one end portion in the first direction. The gap is formed between the tip of the protrusion inserted into the holding part and the bottom of the holding part on the bottom side of the holding part, which is the other end in the first direction.

  The electromagnetic relay which concerns on the 3rd aspect of this indication is further provided with at least one of a taper part and a guide part in the 1st or 2nd aspect. The tapered portion is inclined in a direction away from the holding portion as it approaches the tip at the tip of the protrusion. The guide portion is inclined in a direction away from the protrusion as it approaches the opening end on the opening side of the holding portion, which is one end portion in the first direction.

  The electromagnetic relay which concerns on the 4th aspect of this indication is further provided with the case which accommodates at least the said electromagnet and the said movable spring in any one of the 1st-3rd aspect. The fixed terminal further includes a collection unit that collects water vapor in the case as condensation or icing. The contact portion includes a first surface on which the fixed contact is disposed, and a second surface opposite to the first surface. The collection part includes the second surface. The storage portion is configured to store the contact portion in a state where a gap is provided between a surface of the storage portion facing the second surface and the second surface.

  In the electromagnetic relay according to the fifth aspect of the present disclosure, in any one of the first to fourth aspects, the storage portion stores the contact portion with a gap between the contact portion and the contact portion. It is configured.

  In the electromagnetic relay according to the sixth aspect of the present disclosure, in any one of the first to fifth aspects, the holding portion is in contact with the protrusion from the second direction and the third direction. Is configured to hold. The second direction is a direction that intersects the first direction. The third direction is a direction that intersects both the first direction and the second direction.

  In the electromagnetic relay according to the seventh aspect of the present disclosure, in any one of the first to sixth aspects, the contact portion and the protruding portion are arranged in a second direction intersecting the first direction. .

  In the electromagnetic relay according to the eighth aspect of the present disclosure, in any one of the first to seventh aspects, the protrusions are respectively provided on both sides of the contact portion.

  According to the present disclosure, there is an advantage that contact failure of contacts can be reduced.

FIG. 1 is an exploded perspective view of an electromagnetic relay according to an embodiment of the present disclosure. FIG. 2 is a perspective view of a state where the case is removed from the electromagnetic relay. 3A is a front view of a fixed terminal of the electromagnetic relay, FIG. 3B is a rear view, and FIG. 3C is a bottom view. 4A is a front view of the coil bobbin of the electromagnetic relay, FIG. 4B is a right side view, FIG. 4C is a rear view, and FIG. 4D is a plan view. FIG. 5A is a cross-sectional view showing a main part of the electromagnetic relay same as above. FIG. 5B is a partially enlarged view of FIG. 5A. FIG. 6 is a front view showing a main part of the electromagnetic relay same as above.

(1) Overview Hereinafter, an overview of the electromagnetic relay according to the present embodiment will be described.

  The electromagnetic relay according to the present embodiment is a device for switching the supply state of DC power from, for example, an automobile battery to a load (for example, a lamp, a motor, etc.). In the electromagnetic relay according to the present embodiment, a contact device is inserted into a DC power supply path from a power source such as a battery to the load, and the DC power supply state from the battery to the load can be switched by opening and closing the contact device. it can.

  Conventionally, there has been provided an electromagnetic relay in which a fixed contact terminal having a fixed contact is attached to a bobbin. In this electromagnetic relay, the fixed contact terminal has a fixed contact at one end, and is attached to the bobbin by inserting and fixing the one end into a pair of recesses provided on the bobbin. For this reason, bobbin shavings generated at the time of press-fitting and fixing may adhere to the fixed contact, which may cause poor contact conduction.

  The electromagnetic relay according to the present embodiment is configured as follows so as to reduce the conduction failure of the contacts (fixed contact and movable contact) generated when the shavings of the coil bobbin adhere to the fixed contact. Yes.

  As shown in FIG. 1, the electromagnetic relay 100 according to the present embodiment includes an electromagnet 2, a fixed terminal 1 (first terminal plate 9), and a movable spring 11. The electromagnet 2 includes a coil bobbin 3 and a coil 4 wound around the coil bobbin 3. The fixed terminal 1 has a fixed contact 13 (see FIG. 3B). The movable spring 11 has a movable contact 14. The movable spring 11 moves between a closed position where the movable contact 14 contacts the fixed contact 13 and an open position where the movable contact 14 moves away from the fixed contact 13 in accordance with the excitation and demagnetization of the electromagnet 2.

  The fixed terminal 1 has a contact portion 92 and a projection portion 93. The contact portion 92 includes the fixed contact 13. The protrusion 93 protrudes in a first direction (front-rear direction) that is in the same direction as the contact portion 92 at a position away from the contact portion 92 on at least one side of the contact portion 92. The coil bobbin 3 includes a storage part 35, a holding part 36, and a separation part 37. The storage part 35 stores the contact part 92. The holding portion 36 holds the protruding portion 93 in a state where the protruding portion 93 is inserted and is in contact with the protruding portion 93. The separation unit 37 separates the storage unit 35 and the holding unit 36.

  In the electromagnetic relay 100 according to this embodiment, when the fixed terminal 1 is attached to the coil bobbin 3, the contact portion 92 including the fixed contact 13 is stored in the storage portion 35, and the protruding portion 93 is held by the holding portion 36. . That is, the fixed terminal 1 is attached to the coil bobbin 3 by holding the protrusion 93 on the holding portion 36. At this time, the protruding portion 93 is in contact with the holding portion 36. Therefore, when the fixed terminal 1 is attached to the coil bobbin 3, shavings may be generated in the holding portion 36. However, since a separation unit 37 that separates the storage unit 35 and the holding unit 36 is provided between the storage unit 35 and the holding unit 36, shavings generated in the holding unit 36 are difficult to move to the storage unit 35 side. That is, in the electromagnetic relay 100 of this embodiment, the shavings of the coil bobbin 3 are less likely to adhere to the fixed contact 13 as compared with the conventional electromagnetic relay described above. As a result, the contact (the fixed contact 13 and the movable contact) 14) The conduction failure can be reduced.

(2) Configuration Hereinafter, the configuration of the electromagnetic relay 100 according to the present embodiment will be described with reference to FIGS.

  Hereinafter, the direction in which the fixed contact 13 and the movable contact 14 are arranged will be referred to as the vertical direction, and the fixed contact 13 side as viewed from the movable contact 14 will be described as the upper side, and the opposite will be described as the lower side. In the following description, the direction in which the first terminal plate 9 and the second terminal plate 10 are arranged is referred to as the front-rear direction, the first terminal plate 9 side as viewed from the second terminal plate 10 is the front, and the reverse is the rear. Furthermore, below, the direction in which the pair of coil terminal plates 8 are arranged will be described as the left-right direction.

  1 to 6 show arrows indicating these directions (up, down, left, right, front, back), but these arrows are described only for the purpose of assisting the explanation. There is nothing but a substance. Further, these directions are not intended to limit the usage pattern of the electromagnetic relay 100.

  The electromagnetic relay 100 according to the present embodiment is a so-called hinge type relay. As shown in FIG. 1, the electromagnetic relay 100 according to the present embodiment includes a contact device A1, an electromagnet device B1, and a case C1.

  As shown in FIGS. 1 and 2, the contact device A <b> 1 includes a first terminal plate 9 as a fixed terminal 1, a second terminal plate 10, a movable spring 11, and a contact plate 12.

  The 1st terminal board 9 (fixed terminal 1) is formed so that the shape seen from the left-right direction may become L shape with an electroconductive material (for example, copper). As shown in FIGS. 3A to 3C, the first terminal plate 9 includes a terminal piece 91, a contact portion 92, a pair of protrusions 93, a pair of first protrusions 94, and a pair of second terminals. And a projecting portion 95. The terminal piece 91 is formed in a rectangular shape that is long in the vertical direction. The contact portion 92 is formed in a rectangular shape that is long in the left-right direction, and protrudes rearward from the upper end edge of the terminal piece 91. The contact portion 92 has a first surface 921 and a second surface 922. In the present embodiment, the first surface 921 is the lower surface of the contact portion 92, and the second surface 922 is the upper surface of the contact portion 92. The fixed contact 13 is attached to the first surface 921 of the contact portion 92 by an appropriate attachment method (for example, caulking and fixing) (see FIG. 3C). In other words, the contact portion 92 includes the fixed contact 13. The fixed contact 13 may be configured integrally with the first terminal board 9.

  The pair of protrusions 93 protrude rearward from the left and right sides of the contact portion 92 at the upper end edge of the terminal piece 91. Each protrusion 93 is provided at a position away from the contact point 92 in the left-right direction. In other words, the pair of protrusions 93 protrude in a first direction (insertion direction of the protrusions 93 with respect to the holding part 36 (described later)) that is in the same direction as the contact part 92 at a position away from the contact part 92. . The contact portion 92 and each protrusion 93 are arranged in a second direction (left-right direction) that intersects the first direction (front-rear direction). Each protrusion 93 is formed in a rectangular shape when viewed from above and below. The tip (rear end) of each protrusion 93 is inclined so that the thickness (vertical dimension) of the protrusion 93 becomes thinner and the width (horizontal dimension) becomes narrower as it approaches the tip. A tapered portion 931 is provided. In other words, each protrusion 93 has a tapered portion 931 that inclines in a direction away from the holding portion 36 as it approaches the tip at the tip. In the present embodiment, a tapered portion 931 is provided on each of the upper surface, the lower surface, the left surface, and the right surface of each protrusion 93.

  Each of the pair of first protrusions 94 protrudes from the left end of each of the pair of protrusions 93 to the left or from the right end to the right. Each of the pair of second protrusions 95 protrudes left or right from both left and right ends of the upper end of the terminal piece 91. The pair of first protrusions 94 and the pair of second protrusions 95 are provided at intervals in the longitudinal direction of the terminal piece 91. Therefore, the first terminal board 9 can be easily bent between the pair of first protrusions 94 and the pair of second protrusions 95.

  The second terminal board 10 is made of a conductive material (for example, copper). As shown in FIG. 1, the second terminal board 10 includes a terminal piece 101, a fixed piece 102, and a connecting piece 103. The terminal piece 101 is formed in a rectangular shape that is long in the vertical direction. The fixed piece 102 is formed in a rectangular shape when viewed from the front-rear direction. A pair of protrusions 104 protruding forward are provided on the front surface of the fixed piece 102. Each of the pair of protrusions 104 is circular. The pair of protrusions 104 are used to attach the second terminal plate 10 to the movable spring 11. The terminal piece 101 and the fixed piece 102 are integrally formed by a rectangular connecting piece 103 that is long in the vertical direction.

  The movable spring 11 is a leaf spring made of a conductive thin plate (for example, a copper plate), and is formed so that the shape seen from the left-right direction is L-shaped. As shown in FIG. 1, the movable spring 11 includes an operating piece 111, a fixed piece 112, and a pair of spring pieces 113. The operating piece 111 is formed in a triangular shape when viewed from the vertical direction. A pair of fixing holes 114 penetrating in the thickness direction (vertical direction) is provided at the rear end portion of the operating piece 111. Each of the pair of fixing holes 114 is circular. The pair of fixed holes 114 are used for attaching the armature 7 (described later) to the movable spring 11. Further, the movable contact 14 is attached to the front end portion of the operating piece 111 by an appropriate attachment method (for example, caulking and fixing). In this embodiment, the movable contact 14 faces upward from both the upper and lower surfaces of the operating piece 111 so as to be able to contact a fixed contact 13 of the first terminal plate 9 and a second fixed contact 15 (described later) of the contact plate 12. It protrudes downward. The movable contact 14 may be configured integrally with the movable spring 11.

  The fixed piece 112 is formed in a rectangular shape that is long in the left-right direction. A pair of fixing holes 115 and a pair of fixing holes 116 penetrating in the thickness direction (front-rear direction) are provided at the lower end of the fixing piece 112. These fixing holes 115 and 116 are both circular. The pair of fixing holes 115 is provided between the pair of fixing holes 116 in the left-right direction. That is, the distance between the pair of fixed holes 115 is narrower than the distance between the pair of fixed holes 116. The pair of fixed holes 115 are used for attaching the second terminal plate 10 to the movable spring 11. Specifically, the second terminal plate 10 is attached to the movable spring 11 by caulking the pair of protrusions 104 respectively inserted into the pair of fixed holes 115 to the movable spring 11. The pair of fixed holes 116 are used for attaching the yoke 6 (described later) to the movable spring 11. Specifically, after a pair of protrusions provided on the rear surface of the first plate 61 (described later) of the yoke 6 is inserted into the pair of fixed holes 116, the pair of protrusions are caulked to the movable spring 11. Thus, the yoke 6 is attached to the movable spring 11.

  The pair of spring pieces 113 is bent at an intermediate portion in the longitudinal direction, and is configured to connect the operating piece 111 and the fixed piece 112 at both ends in the left-right direction.

  The movable spring 11 is configured to bend when the armature 7 is in the first position (position where the armature 7 is in contact with the suction portion 51 (described later)). And the movable spring 11 tries to return to the original state, so that the force in the direction to move the armature 7 from the first position to the second position (position where the armature 7 is separated from the suction portion 51), It acts on the armature 7. That is, the movable spring 11 is configured to cause the armature 7 to be applied with a force in a direction to move the armature 7 from the first position to the second position by an elastic force.

  Here, in this embodiment, the movable contact 14 of the movable spring 11 contacts the fixed contact 13 when the armature 7 is in the first position, and from the fixed contact 13 when the armature 7 is in the second position. Leave. That is, the position of the movable spring 11 when the armature 7 is in the first position is the closed position, and the position of the movable spring 11 when the armature 7 is in the second position is the open position.

  The contact plate 12 is formed of a conductive material (for example, copper) in a rectangular shape that is long in the left-right direction. As illustrated in FIG. 1, the contact plate 12 includes a second contact portion 121 and a pair of second protrusions 122. The second contact portion 121 is formed in a rectangular shape that is long in the left-right direction. The second fixed contact 15 is attached to the upper surface of the second contact portion 121 by an appropriate attachment method (for example, caulking and fixing). The pair of second protrusions 122 protrudes rearward at positions away from the second contact part 121 on both the left and right sides of the second contact part 121. The contact plate 12 is configured such that the movable contact 14 of the movable spring 11 contacts the second fixed contact 15 in a state where the armature 7 is in the second position. The second fixed contact 15 is a dummy contact that restricts the movement of the movable spring 11.

  As shown in FIGS. 1 and 2, the electromagnet device B <b> 1 includes an electromagnet 2, a stator 5, a yoke 6, an armature 7, and a pair of coil terminal plates 8. The stator 5, the yoke 6, and the armature 7 are all made of a magnetic material.

  As shown in FIGS. 1 and 2, the electromagnet 2 includes a coil bobbin 3 and a coil 4.

  The coil bobbin 3 is made of an electrically insulating material such as a synthetic resin material, and is arranged so that its axial direction coincides with the vertical direction. As shown in FIGS. 4A to 4D, the coil bobbin 3 includes a winding drum part 31, an upper collar part 32, and a lower collar part 33. The winding drum part 31 is formed in a cylindrical shape that is long in the vertical direction, and has a hollow part 34 through which the stator 5 is inserted. The upper collar portion 32 has a rectangular shape when viewed in the vertical direction, and is integrally formed at one end (upper end) of the winding drum portion 31. A circular through hole 321 that penetrates in the thickness direction (vertical direction) is provided at the center of the upper collar portion 32. The through hole 321 is connected to the hollow portion 34 of the winding drum portion 31 in the vertical direction.

  The lower collar portion 33 has a rectangular shape when viewed in the vertical direction, and is integrally formed at the other end (lower end) of the winding drum portion 31. A through-hole penetrating in the thickness direction (vertical direction) is provided in the central portion of the lower collar portion 33. The through hole of the lower collar portion 33 is connected to the hollow portion 34 of the winding drum portion 31 in the vertical direction. In other words, the coil bobbin 3 penetrates in the vertical direction by the hollow part 34 of the winding body part 31, the through hole 321 of the upper collar part 32, and the through hole of the lower collar part 33.

  The lower collar part 33 includes a storage part 35, a pair of holding parts 36, and a pair of separation parts 37. Further, the lower collar portion 33 further includes a pair of groove portions 38, a second storage portion 39, and a pair of second holding portions 40. When the contact plate 12 is omitted, the second storage part 39 and the pair of second holding parts 40 may be omitted.

  The storage part 35 is formed in a box shape having an open front surface and a lower surface. The front-rear dimension of the storage part 35 is larger than the front-rear dimension of the contact part 92 of the first terminal board 9, and the left-right dimension of the storage part 35 is larger than the left-right dimension (width dimension) of the contact part 92. Further, the vertical dimension of the storage part 35 is larger than the vertical dimension (thickness dimension) of the contact part 92. That is, in a state where the contact portion 92 is stored in the storage portion 35, the contact portion 92 and the storage portion 35 are not in contact with each other. Details will be described in the column “(3) Mounting structure of fixed terminal”.

  The pair of holding portions 36 are provided on both the left and right sides of the storage portion 35. Each of the pair of holding portions 36 is formed in a box shape having an open front surface. The pair of holding portions 36 and the pair of projecting portions 93 correspond one to one. The first terminal plate 9 is attached to the coil bobbin 3 by inserting each of the pair of protrusions 93 into the corresponding holding portion 36 of the pair of holding portions 36 and holding the protrusions 93.

  In the present embodiment, the longitudinal dimension (front-rear dimension) of each protrusion 93 is smaller than the longitudinal dimension of the corresponding holding part 36. Therefore, in the state where the first terminal plate 9 is attached to the coil bobbin 3, a gap 363 (see FIG. 5B) is provided between the tip (rear end) of each projection 93 and the corresponding bottom 362 (see FIG. 5B) of the holding part 36. 5B) is formed. In other words, the gap 363 is formed between the tip of the protrusion 93 inserted into the holding portion 36 and the holding portion on the bottom 362 (see FIG. 5B) side of the holding portion 36 that is the other end in the first direction (front-rear direction). 36 is formed between the bottom portion 362 of 36.

  Here, the left-right dimension of the holding part 36 is slightly smaller than the left-right dimension of the protruding part 93, and the vertical dimension of the holding part 36 is slightly smaller than the vertical dimension of the protruding part 93. That is, in the present embodiment, each protrusion 93 is press-fitted and fixed to the corresponding holding part 36. In other words, the holding portion 36 has a second direction (left-right direction) that intersects the first direction (front-rear direction) and a third direction (up-down direction) that intersects both the first direction and the second direction. The projection 93 is configured to be held in contact with the projection 93 from the (direction). Therefore, in this case, there is a possibility that the inner surface of the holding portion 36 is scraped by the protrusion 93, but at least a part of the shavings generated at this time can be enclosed in the gap portion 363.

  Each of the pair of separation portions 37 is provided between the storage portion 35 and each holding portion 36 in the left-right direction. In the present embodiment, each of the pair of separation portions 37 is a vertical wall formed between the storage portion 35 and each holding portion 36 in the left-right direction. In other words, each of the pair of separation portions 37 is configured to separate the storage portion 35 and each holding portion 36.

  Each of the pair of grooves 38 is U-shaped when viewed from the front-rear direction, and is formed so that the opening side is the inner side in the left-right direction. In the space formed by the pair of grooves 38, the operating piece 111 of the movable spring 11 is disposed. Therefore, the vertical dimension of each groove 38 is set to a dimension that allows the operating piece 111 to move between the closed position and the open position.

  The 2nd accommodating part 39 is formed in the box shape which the front surface, the rear surface, and the upper surface opened. A pair of second holding portions 40 are provided on the left and right sides of the second storage portion 39. The second storage portion 39 and the pair of second holding portions 40 are used for attaching the contact plate 12 to which the second fixed contact 15 is attached to the coil bobbin 3. That is, the contact plate 12 is attached to the coil bobbin 3 by each of the pair of second protrusions 122 being held by the corresponding second holding part 40 of the pair of second holding parts 40. At this time, the second contact portion 121 including the second fixed contact 15 is stored in the second storage portion 39.

  Further, on both the left and right sides of the lower collar portion 33, groove portions 41 through which the respective winding portions 82 (described later) of the pair of coil terminal plates 8 are inserted are provided.

  The coil 4 is configured by winding an electric wire (for example, copper wire) around the winding body portion 31 of the coil bobbin 3. In the coil 4, the first end of the electric wire is wound around one winding portion 82 of the pair of coil terminal plates 8, and the second end of the electric wire is wound around the other winding portion 82 of the pair of coil terminal plates 8. Thus, the pair of coil terminal plates 8 are electrically connected. The coil 4 is energized by supplying a current through a pair of coil terminal plates 8 and generates a magnetic flux.

  The stator 5 is an iron core formed in a cylindrical shape that is long in the vertical direction. The stator 5 is inserted into the hollow portion 34 of the coil bobbin 3 with both ends in the longitudinal direction (vertical direction) being exposed from the coil bobbin 3. The first end (lower end) in the longitudinal direction of the stator 5 is larger in diameter than the intermediate portion, and faces the armature 7. Hereinafter, the first end of the stator 5 is referred to as a “suction part 51”. The second end (upper end) in the longitudinal direction of the stator 5 is inserted into an insertion hole 621 (described later) of a second plate 62 (described later) of the yoke 6, and the stator 5 is fixed to the yoke 6. Has been.

  The yoke 6 together with the stator 5 and the armature 7 forms a magnetic path through which the magnetic flux generated when the electromagnet 2 is energized. The yoke 6 is formed so that the intermediate portion of a rectangular plate that is long in the up-down direction is bent so that the shape seen from the left-right direction is L-shaped. The yoke 6 has the 1st board 61 and the 2nd board 62, as shown in FIG. Both the first plate 61 and the second plate 62 are rectangular. The second plate 62 is disposed on one end side (upper side) in the axial direction (vertical direction) of the coil 4. The second plate 62 is provided with a circular insertion hole 621 that penetrates in the thickness direction (vertical direction). The second end of the stator 5 is inserted into the insertion hole 621. The first plate 61 is disposed on the rear side of the coil 4. It should be noted that a pair of protrusions protruding rearward are integrally provided on the rear surface of the first plate 61. Then, after the pair of protrusions are inserted into the pair of fixing holes 116 of the fixed piece 112 of the movable spring 11, the pair of protrusions are caulked to the fixed piece 112, so that the movable spring 11 is attached to the yoke 6. It is done.

  The armature 7 is formed in a rectangular shape when viewed from above and below. On the lower surface of the armature 7, a pair of protrusions that protrude downward are integrally provided. Then, after the pair of protrusions are respectively inserted into the pair of fixed holes 114 provided in the operating piece 111 of the movable spring 11, the pair of protrusions are caulked to the operating piece 111, whereby the armature 7 is moved to the movable spring 11. 11 is attached.

  The pair of coil terminal plates 8 is formed of a conductive material (for example, copper). Each of the pair of coil terminal plates 8 includes a coil terminal piece 81 and a winding portion 82 as shown in FIGS. 1 and 2. The coil terminal piece 81 is formed in a rectangular shape that is long in the vertical direction. The winding portion 82 has a rod shape that is long in the vertical direction, and is integrally formed with the upper end edge of the coil terminal piece 81. A first end or a second end of an electric wire constituting the coil 4 is wound around the winding portion 82.

  The case C1 is formed in a box shape from an electrically insulating material such as synthetic resin. As shown in FIG. 1, the case C1 includes a box-shaped cover C11 whose bottom surface is open, and a plate-shaped base C12 that is attached to the cover C11 so as to close the bottom surface opening of the cover C11. And case C1 is comprised by couple | bonding the cover C11 and the base C12 by the adhesion | attachment etc. which used the adhesive agent of the thermosetting resin, for example. Case C1 accommodates contact device A1 and electromagnet device B1. In a state where the contact device A1 and the electromagnet device B1 are housed in the case C1, the terminal piece 91 of the first terminal plate 9, the terminal piece 101 of the second terminal plate 10, and the coil terminal pieces 81 of the pair of coil terminal plates 8 are provided. , Exposed from the case C1.

(3) Attachment Structure of Fixed Terminal Hereinafter, the attachment structure of the fixed terminal 1 (first terminal plate 9) will be described with reference to FIGS. 5A, 5B, and 6. FIG. FIG. 5A is a cross-sectional view of the fixed terminal 1 attached to the coil bobbin 3 when viewed from below. FIG. 5B is an enlarged view of a main part of FIG. 5A. FIG. 6 is a front view showing a main part when the fixed terminal 1 is attached to the coil bobbin 3 as viewed from the front.

  In a state where the fixed terminal 1 is attached to the coil bobbin 3, the contact portion 92 including the fixed contact 13 is stored in the storage portion 35 provided on the lower collar portion 33 of the coil bobbin 3. At this time, as shown in FIG. 5A, the contact portion 92 is provided with a gap G <b> 1 having a dimension H <b> 1 between the left and right side wall portions of the storage portion 35, and between the rear wall portion of the storage portion 35. A gap G2 having a dimension H2 is provided. Further, as shown in FIG. 6, the contact portion 92 is provided with a gap G <b> 3 having a dimension H <b> 3 between the upper wall portion (opposing surface) 351 of the storage portion 35. That is, the contact portion 92 is not in contact with the storage portion 35 in the state of being stored in the storage portion 35. In other words, the storage portion 35 is configured to store the contact portion 92 in a state where gaps G1, G2, and G3 are left between the storage portion 35 and the contact portion 92. As described above, the electromagnetic relay 100 according to the present embodiment has a structure in which the storage portion 35 and the contact portion 92 are not in contact with each other.

  On the other hand, each of the pair of protrusions 93 positioned on the left and right sides of the contact portion 92 is held by the corresponding holding portion 36 of the pair of holding portions 36 in a state where the fixed terminal 1 is attached to the coil bobbin 3. . Specifically, each protruding portion 93 is inserted into the corresponding holding portion 36 and is held by the holding portion 36 in a state of being in contact with the inner surface of the holding portion 36. That is, in this embodiment, the contact part 361 is comprised by the inner surface of the opening part of the holding | maintenance part 36 which is an end part of a 1st direction (front-back direction) among the inner surfaces of the holding | maintenance part 36 (refer FIG. 5B). . Therefore, when the protrusion 93 is held by the holding part 36, shavings are generated by the protrusion 93 coming into contact with the contact part 361. Here, since the separation unit 37 is provided between the storage unit 35 and the holding unit 36, shavings generated in the holding unit 36 are difficult to move to the storage unit 35 side by the separation unit 37. . As a result, it is possible to suppress shavings from adhering to the fixed contact 13 of the contact portion 92 housed in the housing portion 35, thereby comparing the contact (the fixed contact 13 and the movable contact 14 as compared with the conventional electromagnetic relay). ) Conduction failure can be reduced. Further, a gap 363 is formed between the tip of the projection 93 accommodated in the holding part 36 and the bottom 362 of the holding part 36, and at least a part of the shavings can be enclosed in the gap 363. You can also.

  Incidentally, in the electromagnetic relay 100 according to the present embodiment, as shown in FIG. 5B, a taper portion 931 is provided at the tip end portion of the projection portion 93, and a guide portion 364 is provided at the opening end of the holding portion 36. The guide portion 364 is inclined on the opening side of the holding portion 36 that is one end portion in the first direction so as to move away from the protruding portion 93 as it approaches the opening end. In the present embodiment, the guide portions 364 are formed on the upper surface, the lower surface, the left surface, and the right surface of the holding portion 36, respectively. Therefore, when the fixed terminal 1 is attached to the coil bobbin 3, even when the positions of the fixed terminal 1 and the coil bobbin 3 are shifted in at least one of the left and right direction and the vertical direction, the protrusion 93 is inserted into the holding part 36. There is an advantage that it is easy to do.

(4) Collecting part For example, in an environment where the ambient temperature is low, such as in winter or in a cold region, a freezing phenomenon may occur in the sealed case, which may cause poor contact conduction. . Here, the icing phenomenon means that water vapor in the case adheres to a fixed contact, a movable contact or the like in a low temperature environment (0 ° C. or less) and freezes.

  On the other hand, in the conventional electromagnetic relay, the connection part which connects the one end part and other end part of the terminal for fixed contacts is made to function as a collection part. Here, the collection part refers to a part that collects water vapor generated from moisture in the case by condensation or icing. That is, in the conventional electromagnetic relay, the water vapor generated from the water in the case that causes icing is condensed by the collecting part and collected. However, since the conventional electromagnetic relay has a structure in which only the connecting portion that connects one end portion and the other end portion of the fixed contact terminal functions as a collecting portion, water vapor generated from moisture in the case is sufficiently captured. There was a possibility of not being able to collect.

  In the electromagnetic relay 100 according to the present embodiment, the surface area of the collecting portion 96 is made larger than that of the conventional electromagnetic relay so that water vapor generated from the water in the case C1 can be sufficiently collected by condensation or icing. doing. This will be specifically described below.

(4.1) Configuration As shown in FIGS. 3A to 3C, in the electromagnetic relay 100 according to the present embodiment, the collection unit 96 is provided on the fixed terminal 1 (first terminal plate 9) in the case C1. Yes. Specifically, as the collection portion 96, the terminal piece 91 inside the case C1, the second surface (upper surface) 922 of the contact portion 92, the pair of first protrusions 94, and the pair of second protrusions 95, It is equipped with. That is, in the electromagnetic relay 100 according to the present embodiment, the surface area of the collection part 96 is increased as compared with the conventional electromagnetic relay. As a result, according to the electromagnetic relay 100 according to the present embodiment, it is possible to increase the surface area of the portion that collects the water vapor generated from the moisture in the case C1 as dew condensation or icing compared to the conventional electromagnetic relay. In addition, it is possible to reduce contact conduction failure caused by icing of at least one of the fixed contact 13 and the movable contact 14.

(4.2) Action The action of the collection unit 96 will be described.

  In the fixed terminal 1 (first terminal plate 9) provided with the collecting portion 96, the terminal piece 91 protrudes outside the case C1 and is in contact with the low temperature outside air, so the terminal piece 91 inside the case C1 The temperature is lowered relatively earlier than the other components in the case C1. Further, the temperatures of the contact portion 92, the pair of first protrusions 94, and the pair of second protrusions 95 connected to the terminal piece 91 are relatively quickly lowered. Then, in these collection parts 96, water vapor is selectively collected with respect to other parts as dew condensation or icing. Here, as shown in FIG. 6, the second surface 922 of the contact portion 92 that is a part of the collecting portion 96 and the upper wall portion (opposing surface) 351 of the storage portion 35 in which the contact portion 92 is stored. A gap G3 having a dimension H3 is provided therebetween. Therefore, the water vapor flowing into the gap G3 can be collected as dew condensation or icing on the second surface 922. As a result, it is possible to suppress condensation from adhering to at least one of the fixed contact 13 and the movable contact 14, and to reduce contact continuity failure caused by icing of at least one of the fixed contact 13 and the movable contact 14. be able to.

(5) Operation Next, the operation of the electromagnetic relay 100 according to the present embodiment will be described.

  First, the closing operation of the contact device A1 will be described. In the OFF state of the contact device A1, the movable spring 11 is located at the open position by the elastic force of the pair of spring pieces 113. At this time, the movable contact 14 is in contact with the second fixed contact 15 of the second contact portion 121 of the contact plate 12. Further, since the armature 7 is attached to the operating piece 111 of the movable spring 11, it moves downward together with the operating piece 111 and is located at a position (second position) away from the suction portion 51 of the stator 5. Yes.

  When the coil 4 of the electromagnet 2 is energized in the OFF state of the contact device A1, the coil 4 generates a magnetic flux. Then, a magnetic attractive force is generated between the armature 7 and the attracting portion 51 of the stator 5, so that the armature 7 is attracted to the attracting portion 51 against the elastic force of the movable spring 11. Thereby, the armature 7 rotates with the contact part with the yoke 6 as a fulcrum, and moves from the second position to the first position.

  As the armature 7 moves to the first position, the operating piece 111 of the movable spring 11 to which the armature 7 is attached also rotates against the elastic force of the pair of spring pieces 113. As a result, the movable contact 14 is separated from the second fixed contact 15 and contacts the fixed contact 13 of the contact portion 92 of the first terminal board 9. As a result, the contact device A <b> 1 is turned on, and the first terminal plate 9 and the second terminal plate 10 are electrically connected via the fixed contact 13 and the movable contact 14.

  Next, the opening operation of the contact device A1 will be described. When the energization of the coil 4 of the electromagnet 2 is released in the ON state of the contact device A1, the coil 4 does not generate a magnetic flux. Then, the magnetic attraction force between the armature 7 and the attraction portion 51 of the stator 5 is also lost. The armature 7 rotates in the opposite direction to that during the closing operation by the elastic force of the pair of spring pieces 113 of the movable spring 11 and moves from the first position to the second position.

  As the armature 7 moves to the second position, the operating piece 111 of the movable spring 11 to which the armature 7 is attached also rotates in the direction opposite to that during the closing operation by the elastic force of the pair of spring pieces 113. . As a result, the movable contact 14 moves away from the fixed contact 13 and contacts the second fixed contact 15. Thereby, contact device A1 will be in an OFF state.

(6) Modifications The above-described embodiment is merely one of various embodiments of the present disclosure. The above-described embodiment can be variously changed according to the design or the like as long as the object of the present disclosure can be achieved. Hereinafter, modifications of the above-described embodiment will be listed. The modifications described below can be applied in appropriate combinations.

  In the present embodiment, the protruding portions 93 are provided on both the left and right sides of the contact portion 92 including the fixed contact 13, but the protruding portions 93 may be provided on at least one side of the contact portion 92 in the left-right direction.

  In this embodiment, the case where the electromagnetic relay 100 is provided with both the taper part 931 of the projection part 93 and the guide part 364 (refer FIG. 5B) of the holding | maintenance part 36 is demonstrated as an example. On the other hand, the electromagnetic relay 100 may include at least one of the tapered portion 931 and the guide portion 364, or may not include both the tapered portion 931 and the guide portion 364.

  In the present embodiment, the holding portion 36 is in a state in which the holding portion 36 is in contact with the protruding portion 93 from the second direction (left-right direction) and the third direction (up-down direction) intersecting the first direction (front-back direction). Is configured to hold. On the other hand, the holding portion 36 may be configured to hold the protruding portion 93 in a state where the protruding portion 93 is inserted and is in contact with the protruding portion 93. The holding portion 36 may be configured in the second direction and the third direction. What is necessary is just to be comprised so that the holding | maintenance part 36 may contact the projection part 93 in at least 1 direction.

  In the present embodiment, the contact portion 92 and the projection portion 93 are formed so as to be aligned in a second direction (left-right direction) intersecting the first direction (front-rear direction). 93 may be formed so as to be aligned in the vertical direction. That is, the contact part 92 and the protrusion part 93 should just be formed in a line in at least one direction crossing the first direction.

  In the present embodiment, the tapered portion 931 and the guide portion 364 are provided in both the thickness direction (up and down direction) and the width direction (left and right direction), but the tapered portion 931 and the guide portion 364 are in the thickness direction. And at least one in the width direction.

  In the present embodiment, the electromagnetic relay 100 includes the contact plate 12 having the second fixed contact 15 with which the movable contact 14 contacts with the movable spring 11 in the open position, but the contact plate 12 is omitted. May be.

  In the present embodiment, the collecting portion 96 is configured by the second surface 922 of the contact portion 92, the pair of first projecting portions 94, and the pair of second projecting portions 95. What is necessary is just to be comprised by the 2nd surface 922 of the contact part 92 at least. That is, the pair of first protrusions 94 and the pair of second protrusions 95 may be omitted.

  In the present embodiment, the contact portion 92 and the storage portion 35 are configured not to contact each other in three directions (front-rear direction, up-down direction, and left-right direction), but the contact portion 92 and the storage portion 35 in at least one direction. What is necessary is just to be comprised so that may not contact. According to this configuration, the shavings of the coil bobbin 3 can be reduced compared with the case where the contact portion 92 and the storage portion 35 are in contact in three directions, and as a result, the contact failure of the contact is reduced. can do.

  In the present embodiment, the gap 363 is provided between the tip of the projection 93 inserted into the holding part 36 and the bottom 362 of the holding part 36, but the gap 363 may be omitted. Since the separation part 37 is provided between the storage part 35 and the holding part 36, even if the gap part 363 is omitted, the shavings generated in the holding part 36 hardly adhere to the fixed contact 13.

  In this embodiment, although the case where the electromagnetic relay 100 was a hinge type relay was demonstrated as an example, the electromagnetic relay 100 is not restricted to a hinge type relay, For example, a plunger type relay may be sufficient.

(Summary)
As is clear from the embodiment described above, the electromagnetic relay (100) according to the first aspect includes an electromagnet (2), a fixed terminal (1), and a movable spring (11). The electromagnet (2) has a coil bobbin (3) and a coil (4) wound around the coil bobbin (3). The fixed terminal (1) has a fixed contact (13). The movable spring (11) has a movable contact (14). The movable spring (11) is separated from the closed position where the movable contact (14) contacts the fixed contact (13) and the movable contact (14) is separated from the fixed contact (13) according to the excitation and demagnetization of the electromagnet 2. Move between open positions. The fixed terminal (1) has a contact portion (92) and a protrusion (93). The contact portion (92) includes a fixed contact (13). The protrusion (93) protrudes in a first direction that is the same direction as the contact (92) at a position away from the contact (92). The coil bobbin (3) has a storage part (35), a holding part (36), and a separation part (37). The storage portion (35) stores the contact portion (92). The holding portion (36) holds the protruding portion (93) in a state where the protruding portion (93) is inserted and is in contact with the protruding portion (93). The separation part (37) separates the storage part (35) and the holding part (36).

  According to the first aspect, since the separation part (37) for separating both is provided between the storage part (35) and the holding part (36), the protruding part (93) is attached to the holding part (36). The shavings of the coil bobbin (3) that are generated when the coil bobbin is held on are difficult to adhere to the fixed contact (13). As a result, it is possible to reduce the conduction failure of the contacts (the fixed contact (13) and the movable contact (14)) due to the shavings.

  In the electromagnetic relay (100) according to the second aspect, in the first aspect, the holding part (36) has a contact part (361) and a gap part (363). The contact portion (361) contacts the protrusion (93) on the opening side of the holding portion (36) which is one end portion (front end portion) in the first direction (front-rear direction). The gap (363) is the tip of the protrusion (93) inserted into the holding part (36) on the bottom (362) side of the holding part (36) which is the other end (rear end) in the first direction. And the bottom portion (362) of the holding portion (36).

  According to the 2nd aspect, a fixed terminal (1) can be hold | maintained to a coil bobbin (3) via a projection part (93) by making a contact part (361) contact a projection part (93). Moreover, at least a part of the shavings of the coil bobbin (3) generated by the contact between the contact portion (361) and the protrusion (93) can be contained in the gap portion (363). However, this configuration is not essential, and the holding portion (36) may not have the gap portion (363).

  The electromagnetic relay (100) which concerns on a 3rd aspect is provided with at least one of a taper part (931) and a guide part (364) in the 1st or 2nd aspect. A taper part (931) inclines in the direction which leaves | separates from a holding | maintenance part (36), so that it approaches a front-end | tip part in the front-end | tip part of a projection part (93). A guide part (364) inclines in the direction which leaves | separates from a projection part (93), so that it approaches an opening end in the opening side of the holding part (36) which is one end part of a 1st direction.

  According to the third aspect, the electromagnetic relay (100) includes at least one of the taper portion (931) and the guide portion (364), so that the protrusion (93) is inserted into the holding portion (36). There is an advantage that it becomes easy. Furthermore, when the electromagnetic relay (100) includes the taper portion (931), the contact area between the projection portion (93) and the holding portion (36) can be reduced, whereby the projection portion (93). However, the amount of shavings generated by contacting the holding part (36) can be reduced. However, this configuration is not essential, and the electromagnetic relay (100) may not include both the tapered portion (931) and the guide portion (364).

  In any one of the first to third aspects, the electromagnetic relay (100) according to the fourth aspect further includes a case (C1) that houses at least the electromagnet (2) and the movable spring (11). The fixed terminal (1) further has a collection part (96) for collecting water vapor in the case (C1) as condensation or icing. The contact portion (92) has a first surface (921) on which the fixed contact (13) is disposed, and a second surface (922) opposite to the first surface (921). The collection part (96) includes the second surface (922). The storage portion (35) has a contact portion (92) with a gap (G1) between the surface (351) facing the second surface (922) and the second surface (922) of the storage portion (35). ).

  According to the 4th aspect, the water vapor | steam produced from the water | moisture content in case (C1) of an electromagnetic relay (100) can be collected by a collection part (96) as dew condensation or icing, and also a collection part (96 The condensation or icing collected in 96) can be collected in the gap (G1). However, this configuration is not essential, and the fixed terminal (1) may not have the collection part (96).

  In the electromagnetic relay (100) according to the fifth aspect, in any one of the first to fourth aspects, the storage part (35) has gaps (G1, G2, G3) between the contact part (92). The contact portion (92) is housed in a state where the contact is made.

  According to the fifth aspect, when the contact portion (92) is stored in the storage portion (35), the contact portion (92) and the storage portion (35) do not come into contact with each other, and the shavings of the coil bobbin (3) are removed. The contact with the fixed contact (13) can be further suppressed. However, this configuration is not essential, and the storage portion (35) and the contact portion (92) may be in contact with each other.

  In the electromagnetic relay (100) according to the sixth aspect, in any one of the first to fifth aspects, the holding portion (36) is in contact with the protruding portion (93) from the second direction and the third direction. It is comprised so that a protrusion part (93) may be hold | maintained. The second direction is a direction (horizontal direction) intersecting the first direction, and the third direction is a direction (vertical direction) intersecting both the first direction and the second direction.

  According to the sixth aspect, since the holding portion (36) is in contact with the protruding portion (93) from the second direction and the third direction intersecting with the first direction, the protruding portion (93) is strengthened. Can be held in. However, this configuration is not essential, and the holding portion (36) may not be configured to come into contact with the protruding portion (93) from the second direction and the third direction.

  In the electromagnetic relay (100) according to the seventh aspect, in any one of the first to sixth aspects, the contact portion (92) and the protruding portion (93) intersect the first direction (front-rear direction). It is lined up in two directions (left and right direction).

  According to the 7th aspect, it can reduce in size in the direction (up-down direction) which cross | intersects both the 1st direction and the 2nd direction. However, this configuration is not essential, and the contact portion (92) and the protrusion (93) may not be aligned in the second direction.

  In the electromagnetic relay (100) according to the eighth aspect, in any one of the first to seventh aspects, protrusions (93) are provided on both sides of the contact part (92).

  According to the eighth aspect, the fixed terminal (1) can be firmly fixed to the coil bobbin (3) as compared with the case where the protrusion (93) is provided only on one side of the contact portion (92). it can. However, this configuration is not essential, and the protrusions (93) may not be provided on both sides of the contact part (92).

DESCRIPTION OF SYMBOLS 1 Fixed terminal 2 Electromagnet 3 Coil bobbin 35 Storage part 351 Opposite surface 36 Holding part 361 Contact part 362 Bottom part 363 Gap part 364 Guide part 37 Separation part 4 Coil 9 1st terminal board (fixed terminal)
92 Contact portion 921 First surface 922 Second surface (collecting portion)
93 Projection 94 First Projection (Collector)
95 Second protrusion (collecting part)
931 Taper part 96 Collection part 11 Movable spring 13 Fixed contact 14 Movable contact 100 Electromagnetic relay C1 Case G1, G2, G3 Gap

Claims (8)

An electromagnet having a coil bobbin and a coil wound around the coil bobbin;
A fixed terminal having a fixed contact;
A movable spring that has a movable contact and moves between a closed position where the movable contact contacts the fixed contact and an open position where the movable contact moves away from the fixed contact in response to excitation and demagnetization of the electromagnet. Prepared,
The fixed terminal is
A contact portion including the fixed contact;
A protrusion projecting in a first direction that is in the same direction as the contact portion at a position away from the contact portion,
The coil bobbin
A storage portion for storing the contact portion;
A holding portion that holds the protruding portion in a state in which the protruding portion is inserted and in contact with the protruding portion;
An electromagnetic relay, comprising: a separation unit that separates the storage unit and the holding unit. The holding part is
A contact portion that comes into contact with the protrusion on the opening side of the holding portion, which is one end portion in the first direction;
A gap formed between the tip of the protrusion inserted into the holding portion and the bottom of the holding portion on the bottom side of the holding portion, which is the other end portion in the first direction. The electromagnetic relay according to claim 1. A taper portion that inclines in a direction away from the holding portion as it approaches the tip at the tip of the protrusion, and
3. The electromagnetic wave according to claim 1, further comprising at least one of a guide portion that inclines in a direction away from the protrusion as it approaches the opening end on the opening side of the holding portion that is one end portion in the first direction. relay. A case for accommodating at least the electromagnet and the movable spring;
The fixed terminal further has a collection part for collecting water vapor in the case as condensation or icing,
The contact portion has a first surface on which the fixed contact is disposed, and a second surface opposite to the first surface,
The collection unit includes the second surface,
The said accommodating part is comprised so that the said contact part may be accommodated in the state which left the clearance gap between the surface facing the said 2nd surface in the said accommodating part, and the said 2nd surface. The electromagnetic relay of any one of Claims. The electromagnetic relay according to claim 1, wherein the storage portion is configured to store the contact portion in a state where a gap is left between the storage portion and the contact portion. The holding portion is in contact with the protrusion from a second direction that intersects the first direction and from a third direction that intersects both the first direction and the second direction. The electromagnetic relay according to claim 1, wherein the electromagnetic relay is configured to hold a protrusion. The electromagnetic relay according to any one of claims 1 to 6, wherein the contact portion and the protruding portion are arranged in a second direction that intersects the first direction. The electromagnetic relay according to claim 1, wherein the protrusions are provided on both sides of the contact part.

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