JP6036628B2 - Relay module - Google Patents

Description

  The present invention relates to a relay module including a base member on which a plurality of relay units are mounted on one surface, and a case for housing the base member.

  A general electromagnetic relay stores a relay unit having a fixed contact, a movable contact, and an electromagnetic coil in a space in a cover. The fixed contact, the movable contact, and the electromagnetic coil are connected to an external electric circuit wiring by a metal plate.

  In such an electromagnetic relay, for example, when the temperature of the space in the cover decreases while the vehicle is parked, the relative humidity of the space in the cover may increase and condensation may occur. Moreover, since the fixed contact and the movable contact are connected to the external electric circuit wiring via a metal plate, when the temperature of the external electric circuit wiring decreases, the relay unit There is a problem that the temperature tends to be lower than that of other parts, and therefore, condensation and icing occur at the parts of the fixed contact and the movable contact.

  Therefore, in the electromagnetic relay in which the relay unit is accommodated in the space formed by the resin layer and the cover of the bus bar, an exposure window that exposes the surface of the bus bar to the space is formed in the resin layer, and the fixed contact and the movable contact This occurs at the fixed and movable contact parts of the electromagnetic relay when the ambient temperature of the electromagnetic relay is lowered by condensing at the exposed part of the space by the exposure window in the bus bar earlier than the condensation at the part. There is one that prevents dew condensation (for example, see Patent Document 1).

JP 2003-31095 A

  In recent years, the number of relay modules in which a plurality of relay units are arranged in a space in a cover is increasing. In such a relay module, a situation occurs in which some of the relay units are operated and other relay units are not operated. In such a situation, the relay unit that is operating generates heat by the current flowing through the coil, and the surrounding air is also warmed. However, the relay unit that is not operating does not generate heat, so the surrounding air remains at a low temperature. Therefore, when the temperature of the storage space decreases, the temperature difference between the relay unit that is operating and the relay unit that is not operating in the storage space increases, and in particular, the fixed and movable contacts of the relay unit that is not operating. There is a problem that condensation or icing occurs at the site, and the contact cannot be conducted.

  In the relay module in which a plurality of relay units are arranged in the space in the cover, when the distance between the fixed contact and the movable contact of adjacent relay units is short, the relay module described in Patent Document 1 is used. However, there is a problem that the effect of preventing condensation cannot be obtained sufficiently even if the exposure window is formed on the substrate.

  The present invention has been made in view of the above-described problems, and can prevent dew condensation occurring at the fixed contact point and the movable contact point of the relay unit even when the distance between the fixed contact point and the movable contact point of the adjacent relay unit is short. For the purpose.

  In order to achieve the above object, the invention according to claim 1 includes a base member (30, 40) on which a plurality of relay units (70) having a fixed contact (72) and a movable contact (71) are mounted on one surface; And a case (10) for housing a base member on which a plurality of relay units are mounted. A relay module including a plurality of relay units arranged in the case on one surface of the base member. A member (60) is provided, and the base member includes a space (1) on one surface side of the base member partitioned by a threshold member, and a space (3, 4) on the other surface opposite to the one surface of the base member. A plurality of hole portions (30a, 40a) communicating with each other are formed, and each space (1) on one surface side of the base member partitioned by the squeeze member is formed of the hole portion formed in the base member. Through the base part Is characterized in that the communicates with the space (3, 4) formed by the other side and the case.

  According to such a structure, the threshold member (60) which partitions between the some relay units arrange | positioned in a case is provided in one surface of a base member, and the base is divided into the base by the threshold member. A plurality of holes (30a, 40a) are formed to communicate between each space (1) on one side of the member and a space (3, 4) on the other side opposite to the one side of the base member. The individual spaces on one surface side of the base member partitioned by the threshold member communicate with the space formed by the other surface of the base member and the case through the hole formed in the base member. Even if there is a relay unit that is operating and a relay unit that is not operating, and there is a temperature difference between the relay unit that is operating and the relay unit that is not operating, fixing the relay unit that is not operating Before condensation occurs at the point and the movable contact, the air around the relay unit that is not operating is guided to the space formed by the other surface of the base member and the case through the hole formed in the base member. Cooled on the inner surface of the case and condensed on the inner surface of the case. That is, even when the distance between the fixed contact point and the movable contact point of the adjacent relay unit is short, dew condensation that occurs at the fixed contact point and the movable contact point of the relay unit can be prevented.

  In the invention according to claim 2, a plurality of hole portions are formed around the plurality of hole portions formed on the other surface of the base member so as to surround the entire periphery of the plurality of hole portions. Protrusions (30c, 40c) having a height higher than that of the region are formed.

  According to such a configuration, the periphery of the plurality of holes formed on the other surface of the base member is more than the region in which the plurality of holes are formed so as to surround the entire periphery of the plurality of holes. Since the high protrusions (30c, 40c) are formed, the protrusions can sufficiently secure the spaces (3, 4) formed by the other surface of the base member and the case (10). Is possible.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

It is a perspective view of a relay module concerning one embodiment of the present invention. It is a disassembled perspective view of this relay module. It is the figure seen from the arrow A direction in FIG. FIG. 4 is a schematic sectional view taken along line IV-IV shown in FIG. 3. FIG. 5 is a schematic sectional view taken along line VV shown in FIG. 3.

  FIG. 1 shows a perspective view of a relay module according to an embodiment of the present invention. This relay module is used, for example, as a control relay for vehicle electrical devices such as headlamps and wiper motors.

  The relay module includes a case 10 and a housing 20. A housing 20 is disposed on the back side of the relay module, and a case 10 is disposed on the front side of the relay module. Note that the case 10 and the housing 20 are each made of resin. The housing 20 is formed with a plurality of connector insertion portions 20b for inserting a connector case (not shown) provided at one end of an external electric circuit wiring.

  FIG. 2 shows an exploded perspective view of the relay module. The relay module includes a case 10, a housing 20, a first base member 30, a second base member 40, a terminal 50 and a threshold member 60.

  The first base member 30, the second base member 40, and the threshold member 60 are each configured using a resin, and the terminal 50 is configured using a metal member. The first base member 30, the second base member 40, the terminal 50 and the threshold member 60 are accommodated in the case 10.

  A circuit component including five relay units 70 is mounted on the surface of the first base member 30 facing the second base member 40. The first base member 30 has a plurality of holes 30a.

  A plurality of external lead terminals 30b for controlling the relay unit 70 and the like are provided on the side surface of the first base member 30 on the housing 20 side so as to be exposed. Each external lead-out terminal 30b is connected to each terminal (not shown) in the connector case provided at one end of the external electric circuit wiring.

  On the other hand, although not shown in FIG. 2, circuit components including five relay units 70 are mounted on the surface of the second base member 40 facing the first base member 30. The second base member 40 is also formed with a plurality of holes 40a.

  The second base member 40 is provided with a metal fixed contact holder 41 and a metal bus bar (plate material) by insert molding (integral molding). The bus bar performs electrical connection between a fixed contact 72 of the relay unit 70 and an external lead-out terminal 40b, which will be described later, and electrical connection between the movable contact 71 of the relay unit 70 and the external lead-out terminal 40b. is there. Each external lead-out terminal 30b described above is constituted by a part of the bus bar.

  Although not shown in FIG. 2, in the first base member 30, similarly to the second base member 40, a metal fixed contact holder and a metal bus bar (plate material) are provided by insert molding. ing.

  A metal fixed contact holder and a bus bar are insert-molded in the main bodies of the first and second base members 30 and 40 in the holes 30a and 40a formed in the first and second base members 30 and 40, respectively. For example, and those formed by bending the fixed contact holders 31 and 41 formed on the first and second base members 30 and 40 are included. Details of the bending process of the fixed contact holders 31 and 41 will be described later.

  A plurality of holes 40a are formed on the surface of the second base member 40 opposite to the mounting surface of each relay unit 70 so as to surround the plurality of holes 40a formed in the second base member 40. A protrusion 40c having a height higher than that of the region is formed.

  Similarly, although not shown in FIG. 2, the entire plurality of holes 30 a formed in the first base member 30 are formed on the surface opposite to the mounting surface of each relay unit 70 in the first base member 30. A protruding portion 30c having a height higher than that of the region in which the plurality of hole portions 30a is formed is formed so as to surround.

  A plurality of external lead terminals 40b for controlling the relay unit 70 and the like are also exposed on the side surface of the second base member 40 on the back side of the relay module.

  In the space between the first base member 30 and the second base member 40, there are five relay units 70 mounted on the first base member 30 and five relay units 70 mounted on the second base member 40. A total of ten relay units 70 are arranged.

  In addition, in the space between the first base member 30 and the second base member 40, a threshold member 60 that partitions the adjacent relay units 70 is provided for the ten relay units 70 arranged in the space. It has been.

  The terminal 50 performs electrical connection between each relay unit 70 and each fuse 80 mounted on the first base member 30 and the second base member 40.

  Next, the assembly of this relay module will be described with reference to FIG. First, the first base member 30 is prepared, and the cut-off member 60 is provided on the mounting surface of each relay unit 70 in the first base member 30 so as to partition the relay units 70 mounted on the first base member 30. Deploy. Next, the second base member 40 is placed on the first base member 30 such that the surface of the second base member 40 on which each relay unit 70 is mounted faces the mounting surface of each relay unit 70 on the first base member 30. Place on top. Next, the terminal 50 is fixed to the surface of the second base member 40 opposite to the surface on which the relay units 70 are mounted. Next, each of these members 30, 40, 50, 60 is inserted from the opening 10 a of the case 10 and stored in the case 10. Next, the housing 20 is fitted into the opening 10 a of the case 10. Finally, each of the fuses 80 is fitted into a fuse insertion portion (not shown) to complete the relay module.

  FIG. 3 shows a view as seen from the direction of arrow A in FIG. 3 is a view seen through the case 10 at the position of the second base member 40 and the central portion (region surrounded by the thick line X) of the second base member 40. FIG.

  In the figure, the five relay units 70 arranged on the back side of the relay module are mounted on the first base member 30, and the five relay units 70 arranged on the front side of the relay module are the second base. It is mounted on the member 40.

  The threshold member 60 partitions the adjacent relay units 70 as described above. With this threshold member 60, the five relay units 70 mounted on the first base member 30 and the five relay units 70 mounted on the second base member 40 are partitioned into individual spaces 1.

  The relay unit 70 includes a movable contact 71, a fixed contact 72, a coil 73, a leaf spring 74, and a movable iron piece 75. A protrusion (not shown) provided on the relay unit 70 is press-fitted into a hole (not shown) formed in the first and second base members 30 and 40, and the main body of each relay unit 70 is the first base. It is fixed to the member 30 or the second base member 40.

  Further, the fixed contact 72 is caulked and fixed to one end portions of the fixed contact holders 31 and 41 provided on the first and second base members 30 and 40. The fixed contact holders 31, 41 are bent at a right angle at the center in the longitudinal direction of the flat fixed contact holders 31, 41, and a part where the fixed contact 72 is fixed stands upright. In this manner, the fixed contact 72 is opposed to the movable contact 71 by bending the fixed contact holders 31 and 41.

  In addition, holes 30a and 40a are formed near the first and second base members 30 and 40 by bending a part of the fixed contact holders 31 and 41 to which the fixed contact 72 is fixed.

  Further, the first and second base members 30 and 40 are provided with stoppers 76 for limiting the moving range of the movable contact 71 of the relay unit 70.

  In each relay unit 70, a case for sealing the movable contact 71, the fixed contact 72, the coil 73, the leaf spring 74, the movable iron piece 75, etc. is not provided. The reason why such a case is not provided is that if there is no air in and out of the above-described space, the moisture contained in the air in the above-described space causes dew condensation or icing on the parts of the movable contact 71 and the fixed contact 72. Because.

  In a state where no current flows through the coil 73 and the coil 73 is not excited, the movable contact 71 and the fixed contact 72 are separated by the leaf spring 74, and the movable contact 71 and the fixed contact 72 are not conductive. It becomes. Further, when a current flows through the coil 73 and the coil 73 is excited, the movable contact 71 moves to the fixed contact 72 side, and the movable contact 71 and the fixed contact 72 are brought into conduction.

  FIG. 4 shows a schematic cross-sectional view along the line IV-IV shown in FIG. FIG. 5 is a schematic sectional view taken along the line VV shown in FIG. 4 and 5, the hatching of the cross section of the relay unit 70 is omitted.

  As shown in FIGS. 4 and 5, the first base member 30 includes a space 1 on one surface side of the first base member 30 partitioned by the case 10 and the squeezing member 60, and one surface of the first base member 30. A plurality of hole portions 30a communicating with the spaces 3 and 4 on the other surface side on the opposite side are formed.

  Similarly, for the second base member 40, each space 1 on the one surface side of the second base member 40 partitioned by the case 10 and the threshold member 60 and the space 1 on the one surface side of the second base member 40 are on the opposite side. A plurality of holes 40a communicating with the spaces 3 and 4 on the other surface side are formed.

  As shown in FIG. 4, each space 1 in the case 10 partitioned by the threshold member 60 includes a plurality of holes 30 a formed in the first base member 30, as indicated by an arrow B in the figure, The other surface of the first base member 30 communicates with the space 3 formed by the case 10. Furthermore, the individual spaces 1 in the case 10 partitioned by the squeeze member 60 have a plurality of holes 40a formed in the second base member 40 and the second base member 40, as indicated by an arrow C in the drawing. The other surface communicates with the space 4 formed by the case 10.

  Moreover, as shown in FIG. 5, each space 1 in the case 10 partitioned by the squeezing member 60 has a plurality of holes 30a formed in the first base member 30 as shown by an arrow D in the drawing. And the other surface of the first base member 30 and the space 3 formed by the case 10 communicate with each other. Further, the individual spaces 1 in the case 10 partitioned by the squeeze member 60 are formed of a plurality of holes 40a formed in the second base member 40 and the second base member 40, as indicated by an arrow E in the drawing. The other surface communicates with the space 4 formed by the case 10.

  By the way, the movable contact 71 and the fixed contact 72 of each relay unit 70 shown in FIG. 3 are connected to an external electric circuit wiring (not shown) via the external lead-out terminals 30b and 40b shown in FIG. It has come to be. For this reason, the movable contact 71 and the fixed contact 72 are likely to be colder than other portions of the relay unit 70 when the temperature of the external electric circuit wiring is lowered. Accordingly, condensation is likely to occur at the movable contact 71 and the fixed contact 72.

  Further, when a plurality of relay units 70 are accommodated in the case 10 as in this relay module, a situation occurs in which some relay units 70 are activated and other relay units 70 are not activated. . In such a situation, the relay unit 70 that is operating generates heat by the current flowing through the coil and the surrounding air is also warmed, but the relay unit 70 that is not operating does not generate heat and remains at a low temperature.

  Therefore, when the temperature of the storage space decreases, the temperature difference between the relay unit 70 that is operating in the storage space and the relay unit 70 that is not operating increases, and in particular, the movable contact 70 of the relay unit 70 that is not operating. Condensation and icing are likely to occur at the fixed contact 72.

  However, in the present relay module, on one surface of the first and second base members 30 and 40, a squeeze member 60 that partitions between the plurality of relay units 70 arranged in the case is provided. The two base members 30 and 40 include a space 1 on the one surface side of the first and second base members 30 and 40 partitioned by the threshold member 60, and a surface opposite to the one surface of the first and second base members 30 and 40. A plurality of holes 30a and 40a communicating with the spaces 3 and 4 on the other surface side are formed, and each of the first and second base members 30 and 40 on the one surface side partitioned by the squeeze member 60 is formed. The space 1 is a space 3, 4 formed by the other surface of the first and second base members 30, 40 and the case 10 through holes 30 a, 40 a formed in the first and second base members 30, 40. For example, it works Even if there is a temperature difference between the relay unit 70 that is operating and the relay unit 70 that is not operating and a relay unit 70 that is not operating, the fixing of the relay unit 70 that is not operating is fixed. Before the dew condensation occurs at the contact and movable contact portions, the air around the relay unit 70 that is not in operation passes through the first and second base members 30 and 40 through the holes 30a and 40a. It is guided to the spaces 3 and 4 formed by the other surfaces of the second base members 30 and 40 and the case 10 and is cooled by the inner surface of the case to condense on the inner surface of the case. That is, even when the distance between the fixed contact point and the movable contact point of the adjacent relay unit is short, dew condensation that occurs at the fixed contact point and the movable contact point of the relay unit can be prevented.

  Furthermore, the temperature of the threshold member 60 that partitions the periphery of the relay unit 70 that is not operating is lower than the temperature of the member 60 that partitions the periphery of the relay unit 70 that is operating, and The ambient air hits the surface of the squeeze member 60 that partitions the periphery of the relay unit 70 that is not operating, and is cooled. In other words, the air around the relay unit 70 that is not in operation is cooled by hitting the surface of the threshold member 60 having a large surface area, and condensation occurs on the surface of the threshold member 60. Condensation that occurs at the contact point can be prevented.

  In addition, a plurality of holes are provided around the plurality of hole portions 30a and 40a formed on the other surfaces of the first and second base members 30 and 40 so as to surround the entire periphery of the plurality of hole portions 30a and 40a. Since the projecting portions 30c and 40c having a height higher than the region where the portions 30a and 40a are formed are formed, the projecting portions 30c and 40c are formed by the other surfaces of the base members 30 and 40 and the case 10. It is possible to sufficiently secure the spaces 3 and 4.

  In addition, this invention is not limited to the said embodiment, Based on the meaning of this invention, it can implement with a various form.

  For example, in the above embodiment, the example in which the first base member 30 on which the plurality of relay units 70 are mounted and the second base member 40 on which the plurality of relay units 70 are mounted is stored in the case 10 so as to face each other. However, it can also be set as the structure where either one of the 1st base member 30 and the 2nd base member 40 is accommodated in the case 10. FIG.

  Moreover, in the said embodiment, although the example comprised using resin about the material of the case 10 and the housing 20, for example, the material of each member shown in the said embodiment, etc. was shown in the said embodiment. It is not limited to things.

DESCRIPTION OF SYMBOLS 10 Case 20 Housing 30 1st base member 30a Hole 40 Second base member 40a Hole 60 Clearing member 70 Relay unit 71 Movable contact 72 Fixed contact 73 Coil 74 Leaf spring 75 Movable iron piece

Claims (2)

A base member (30, 40) on which a plurality of relay units (70) having a fixed contact (72) and a movable contact (71) are mounted on one surface, and a case for housing the base member on which the plurality of relay units are mounted (10) and a relay module comprising:
On one surface of the base member, a squeeze member (60) for partitioning between the plurality of relay units arranged in the case is provided,
The base member includes a space (1) on one side of the base member partitioned by the threshold member and a space (3, 4) on the other side opposite to the one side of the base member. A plurality of communicating holes (30a, 40a) are formed,
Each space (1) on one surface side of the base member partitioned by the threshold member is a space formed by the other surface of the base member and the case via the hole formed in the base member ( A relay module characterized in that it communicates with 3, 4).   Projections having a height higher than the region where the plurality of hole portions are formed around the plurality of hole portions around the plurality of hole portions formed on the other surface of the base member. The relay module according to claim 1, wherein a portion (30 c, 40 c) is formed.

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