JP4934332B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electrical junction box used for an automobile or the like, and more particularly to an electrical junction box having a housing for mounting a relay.

  In general, in the field of automobiles and the like, a relay box is used as an electrical connection box for storing electrical components such as various electric circuits and electronic components.

  As shown in FIG. 6, the relay box 50 includes a box body 51 and a housing 53 that is formed to protrude from the upper surface of the box body 51 and in which the relay 52 is mounted. A plurality of male terminals 52a are arranged at predetermined intervals on the bottom surface of the relay 52, and a plurality of insertion holes 53a into which the male terminals 52a of the relay 52 are inserted are formed in the housing 53, and the inside of each insertion hole 53a is formed. Is provided with a female terminal 53b that is electrically connected to the male terminal 52a of the relay 52.

  In the conventional electrical junction box, the relay 52 is held in the housing 53 by the contact pressure between the male terminal 52 a of the relay 52 and the female terminal 53 b of the housing 53. Since the holding power is weak, a structure for enhancing the holding power has been proposed.

  For example, in Japanese Patent Laid-Open No. 7-143645, a relay provided with a locking projection, an electrical connection box side relay housing to which the relay is connected, and an electrical connection box side relay housing that is erected on one side face, A flexible locking arm having a locking claw that engages with the locking projection, a surrounding wall standing on the outside of the locking arm, and a gap between the surrounding wall and the locking arm. And a locking member for restricting the swinging of the locking arm, and when the relay and the electrical connection box side relay housing are connected, the locking protrusion of the relay and the locking claw of the locking arm are engaged. A relay holding structure is proposed in which the lock member enters the gap between the surrounding wall and the locking arm and restricts the swinging of the locking arm.

JP-A-7-143645

  In the conventional relay holding structure, the relay is engaged only on one side of the housing, so if a heavy relay or a large relay is mounted on the housing, the Vibration is likely to occur. As a result, there is a problem that the contact pressure between the terminals gradually becomes weak, causing trouble in electrical connection or causing malfunction.

  In addition, there is a problem that the holding force between the relay and the housing may decrease with the aging deterioration due to wear.

  In addition, ribs and walls surrounding the periphery of the relay may be provided on the box body, but these are designed as insertion guides to prevent twisting, and because the clearance between the relay is large, It is difficult to suppress the vibration of the relay.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an electric junction box that can suppress vibration of a relay when a heavy relay or a large relay is mounted on a housing. And

The first electrical junction box of the present invention is
In an electrical junction box with a housing for mounting a relay,
A first relay movement restricting portion that is in contact with a relay mounted on the housing and restricts horizontal movement along a mounting surface of the relay;
A second relay movement restricting portion that is locked to the relay mounted on the housing and restricts movement in a direction perpendicular to the mounting surface of the relay;
The first relay movement restricting portion and the second relay movement restricting portion are provided on the inner side surface of the kink preventing wall formed by being bent along the side surface of the mounted relay around the housing. ,
The first relay movement restricting portion is formed on a side surface substantially L-shape so as to be abutted on the side and bottom surfaces of the flange portion formed on a side surface of the relay,
Said second relay movement restricting portion is formed on the elastically deformable plate-shaped as a fulcrum a proximal end portion of the inner surface side of the prevention wall the twist is locked to the upper surface of the flange portion formed on the relay Having a locking piece
It is characterized by this.

The second electrical junction box of the present invention is
In an electrical junction box with a housing for mounting a relay,
A first relay movement restricting portion that is in contact with a relay mounted on the housing and restricts horizontal movement along a mounting surface of the relay;
A second relay movement restricting portion that is locked to the relay mounted on the housing and restricts movement in a direction perpendicular to the mounting surface of the relay;
The first relay movement restricting portion and the second relay movement restricting portion are provided on the inner side surface of the kink preventing wall formed by being bent along the side surface of the mounted relay around the housing. ,
The first relay movement restricting portion is formed in an elastically deformable tongue shape, and is in contact with a side surface of a collar portion formed on a side surface of the relay,
Said second relay movement restricting portion is formed on the elastically deformable plate-shaped as a fulcrum a proximal end portion of the inner surface side of the prevention wall the twist is locked to the upper surface of the flange portion formed on the relay Having a locking piece
It is characterized by this.

The kink preventing wall may be provided on the housing with a space therebetween.

The kink preventing wall may be formed in the housing so as to surround the entire periphery of the relay.

  According to the electrical junction box of the present invention, the first relay movement restricting portion restricts horizontal movement along the relay mounting surface, and the second relay movement restricting portion is perpendicular to the relay mounting surface. Therefore, even when a heavy relay or a large relay is attached to the housing, it is possible to suppress the play of the relay and the occurrence of vibration due to the vibration of the vehicle. As a result, the contact pressure between the terminals is maintained, and it is possible to prevent troubles in electrical connection and malfunction. Moreover, since the vibration of the relay is suppressed, it is possible to reduce a decrease in the holding force between the relay and the housing due to aged deterioration due to wear.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1A is a plan view showing an electrical junction box according to Embodiment 1 of the present invention, FIG. 1B is a cross-sectional view taken along line b1-b1 in FIG. 1A, and FIG. 1C is a cross-sectional view taken along line c1-c1 in FIG. 2A is a plan view showing a state where a relay is mounted on the electrical junction box according to Embodiment 1 of the present invention, FIG. 2B is a sectional view taken along line b2-b2 in FIG. It is c2-c2 sectional view taken on the line of A).

  As shown in FIGS. 1 and 2, the electrical junction box according to the first embodiment of the present invention includes a box main body 1 and a housing 3 that is formed to protrude from the upper surface of the box main body 1 and for mounting the relay 2. It has a relay box 4 provided. A plurality of insertion holes 3a into which the male terminals 2a of the relay 2 are inserted are formed in the housing 3, and female terminals 3b electrically connected to the male terminals 2a are provided in the respective insertion holes 3a.

  The housing 3 is made of, for example, a synthetic resin.

  On the upper surface of the box body 1 around the housing 3, there are provided four anti-knotting walls 5 bent in a substantially L shape in plan view at the corners of a substantially square shape.

  A first relay movement restricting portion 6 for restricting movement in the horizontal direction (XY axis direction in the drawing) along the mounting surface of the relay 2 mounted on the housing 3 is provided at the lower portion of the inner side surface of the kink preventing wall 5. It has been. The first relay movement restricting portion 6 is formed in a substantially L shape in a side view so as to be in contact with the side surface and the bottom surface of the flange portion 2 b formed at the lower side surface of the relay 2. Two places are provided at both ends. The contact surface 6a of the first relay movement restricting portion 6 that is in contact with the side surface of the flange portion 2b is formed to be inclined slightly inward in the insertion direction of the relay 2 so that the relay 2 can be easily inserted. It is preferable (see FIG. 1B).

  Further, a second relay movement restricting portion 7 that restricts movement in the vertical direction (Z-axis direction in the drawing) with respect to the mounting surface of the relay 2 mounted on the housing 3 is provided on the inner surface of the kink preventing wall 5. It has been. The second relay movement restricting portion 7 includes a locking piece 7a that can be elastically deformed with the base end portion as a fulcrum, and the distal end portion of the locking piece 7a is locked to the upper surface of the flange 2b of the relay 2. (See FIG. 2C).

  The second relay movement restricting portion 7 is provided at one place on each of the two anti-fouling walls 5a and 5b facing diagonally opposite each other.

  The first relay movement restricting portion 6 and the second relay movement restricting portion 7 are made of synthetic resin or the like as in the housing 3, and are manufactured by being integrally molded with other relay box 4 members. May be manufactured as a separate part.

  In the drawings, reference numeral 4a denotes a die hole.

  Next, the operation of the electrical junction box according to the first embodiment of the present invention will be described.

  The relay 2 is attached to the housing 3 by inserting the male terminal 2 a of the relay 2 into the insertion hole 3 a of the housing 3 of the relay box 4. At that time, the male terminal 2a of the relay 2 and the female terminal 3b in the insertion hole 3a of the housing 3 are electrically connected.

  When the relay 2 is mounted, the side surface and the bottom surface of the flange portion 2 b formed at the lower portion of the relay 2 are in contact with the first relay movement restriction portion 6. Thereby, the movement in the horizontal direction (XY axis direction in the drawing) along the mounting surface of the relay 2 mounted on the housing 3 is restricted.

  Further, in the mounting process of the relay 2, the flange portion 2 b formed at the lower portion of the relay 2 hits the locking piece 7 a formed at the second relay movement restricting portion 7, and the distal end portion of the locking piece 7 a is used as the housing 3. Press outside. When the bottom surface of the flange portion 2b is brought into contact with the first movement restricting portion 6, the locking piece 7a returns to its original position due to its elastic force, and its tip portion is engaged with the upper surface of the flange portion 2b of the relay 2. Stopped. As a result, movement in the vertical direction (Z-axis direction in the drawing) with respect to the mounting surface of the relay 2 mounted on the housing 3 is restricted.

  In addition, the 1st relay movement control part 6 and the 2nd relay movement control part 7 may each be comprised as a different site | part, and may be integrated.

  When the first relay movement restriction unit 6 and the second relay movement restriction unit 7 are configured as different parts as in the present embodiment, the movement restriction in different directions is easily and reliably performed. It is preferable at the point which can do. That is, when these two parts are integrated, the movement restriction in the other direction is loosened during the operation of restricting the movement of the relay 2 in a predetermined direction. As a result, it is difficult to achieve both movement restrictions in the different directions of the relay 2. There is a possibility that it will become, but there is no such worry if it is a separate body.

  Moreover, when the 1st relay movement control part 6 and the 2nd relay movement control part 7 are integrated, it is preferable at the point from which the shape of an electrical junction box becomes simple.

  According to the electrical junction box according to the first embodiment of the present invention, the horizontal movement along the mounting surface of the relay 2 is restricted by the first relay movement restricting portion 6, and the relay is restricted by the second relay movement restricting portion 7. Since the movement in the vertical direction with respect to the mounting surface of the relay 2 is restricted, even when the heavy relay 2 or the large relay 2 is mounted on the housing 3, the rattling or vibration of the relay 2 due to the vibration of the vehicle or the like Occurrence can be suppressed. As a result, the contact pressure between the terminals is maintained, and it is possible to prevent troubles in electrical connection and malfunction. Further, since the vibration of the relay 2 is suppressed, it is possible to reduce a decrease in the holding force between the relay 2 and the housing 3 due to aged deterioration due to wear.

  3A is a plan view showing an electrical junction box according to Embodiment 2 of the present invention, FIG. 3B is a cross-sectional view taken along line b3-b3 in FIG. 3A, and FIG. 3C is a cross-sectional view taken along line c3-c3 in FIG. 4A is a plan view showing a state where the relay 2 is mounted on the electrical junction box showing the second embodiment of the present invention, FIG. 4B is a sectional view taken along line b4-b4 of FIG. It is c4-c4 sectional view taken on the line of (A).

  The electrical junction box according to the second embodiment of the present invention is characterized in that no kink preventing wall 5 is provided on the box body 1. The first relay movement restricting portion 8 is the same as the member 6 of the first embodiment.

  The second relay movement restricting portion 9 has a locking piece 9a provided with a locking projection 9b formed to protrude inward from the tip.

  In the mounting process of the relay 2, the flange portion 2 b formed at the lower portion of the relay 2 hits the locking protrusion 9 b formed on the locking piece 9 a of the second relay movement restricting portion 9, and the locking piece 9 a is moved to the housing 3. Press outside. When the bottom surface of the flange portion 2b comes into contact with the first relay movement restricting portion 8, the locking piece 9a returns to its original position by its elastic force, and the locking protrusion 9b is the upper surface of the flange portion 2b of the relay 2. It is locked to. As a result, movement in the vertical direction (Z-axis direction in the drawing) with respect to the mounting surface of the relay 2 mounted on the housing 3 is restricted.

  According to the electrical junction box according to the second embodiment of the present invention, since the kink preventing wall 5 is not provided, the number of parts can be reduced and the cost of the product can be reduced.

  5A is a plan view showing an electrical junction box according to Embodiment 3 of the present invention, FIG. 5B is a sectional view taken along line b5-b5 in FIG. 5A, and FIG. 5C is a state where movement of the relay is restricted. It is explanatory drawing which shows.

As shown in FIG. 5A, in the electrical junction box according to the third embodiment of the present invention, the kink preventing wall 5 is formed so as to surround the entire periphery of the relay 2. A first relay movement restriction unit 11 and a second relay movement restriction unit 7 are provided on the inner wall of the kink preventing wall 5.
The first relay movement restricting portions 11 are formed at eight locations, two on each side of the corner inner wall of the kink preventing wall 5. Unlike the first relay movement restricting portion 6 in FIG. 1, the first relay movement restricting portion 11 in the third embodiment is formed in a tongue piece shape as shown in FIG. As shown in FIG. 5C, the flange 2b of the relay 2 is elastically supported from the side. According to the 1st relay movement control part 11, the movement along the mounting surface of the relay 2 can be controlled similarly to the 1st relay movement control part 6 of FIG.

  Further, the relay 2 has a dimensional tolerance (for example, about ± 0.5 mm), and in the worst case, the first relay movement restricting portion 6 in FIG. 1 cannot sufficiently absorb the dimensional tolerance, and so-called looseness may occur. is assumed. On the other hand, since the first relay movement restricting portion 11 has a large elastic deformation region due to its tongue piece shape, the first relay movement restricting portion 11 is shaped to absorb the dimensional tolerance of the relay 2 within the elastic deformation region of the first relay movement restricting portion 11. Can be defined. Therefore, according to the 1st relay movement control part 11, even when the dimensional tolerance of the relay 2 is large, the dimensional tolerance of the relay 2 can be absorbed.

  The second relay movement restricting portion 7 is formed at a total of four central portions in the direction of each side of the surface parallel to the relay 2 mounting surface of the kink preventing wall 5. And since it hold | maintains in four directions, the movement of the relay 2 can be controlled with a sufficient balance rather than the case of FIG.

In FIG. 5, reference numeral 10 indicates a pedestal forming a mounting surface on which the relay 2 is mounted.
According to the electrical junction box according to the third embodiment of the present invention, since the first relay movement restricting portion 11 and the second relay movement restricting portion 7 described above are included, the movement of the relay 2 can be more reliably attached to the relay 2. In addition to being able to regulate in the plane and the direction perpendicular thereto, the dimensional tolerance of the relay 2 can also be absorbed.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical matters described in the claims. For example, the first movement restricting portion and the second movement restricting portion may be arranged at any position around the housing 3 as long as the movement of the relay 2 can be restricted, and the number, material, The shape and the like are examples and are not limited thereto.

  The present invention is applied to an electrical junction box that is mounted on an automobile or the like and includes a housing for mounting a relay.

(A) is a top view which shows the electrical junction box which concerns on Example 1 of this invention, (B) is the b1-b1 sectional view taken on the line of (A), (C) is the c1-c1 sectional view taken on the line of (A). is there.

(A) is a top view which shows the state which mounted | wore the electrical junction box based on Example 1 of this invention with the relay, (B) is the b2-b2 sectional view taken on the line of (A), (C) is c2 of (A). -C2 sectional view.

(A) is a top view which shows the electrical-connection box based on Example 2 of this invention, (B) is the b3-b3 sectional view taken on the line of (A), (C) is the c3-c3 sectional view taken on the line of (A). is there.

(A) is a top view which shows the state which mounted | wore the electrical junction box based on Example 2 of this invention, the relay is the sectional view on the b4-b4 line of (A), (C) is c4 of (A). -C4 sectional view.

(A) is a top view which shows the electrical junction box which concerns on Example 3 of this invention, (B) is the b5-b5 sectional view taken on the line of (A), (C) shows the state by which the movement of the relay is controlled. It is explanatory drawing.

It is explanatory drawing which shows the conventional electrical junction box roughly.

Explanation of symbols

1: box body 2: relay 3: housing 4: relay box 5: kink prevention wall 6: first relay movement restricting portion 7: second relay movement restricting portion 8: first relay movement restricting portion 9: second Relay movement restriction unit 10: pedestal 11: first relay movement restriction unit

Claims (4)

In an electrical junction box with a housing for mounting a relay,
A first relay movement restricting portion that is in contact with a relay mounted on the housing and restricts horizontal movement along a mounting surface of the relay;
A second relay movement restricting portion that is locked to the relay mounted on the housing and restricts movement in a direction perpendicular to the mounting surface of the relay;
The first relay movement restricting portion and the second relay movement restricting portion are provided on the inner side surface of the kink preventing wall formed by being bent along the side surface of the mounted relay around the housing. ,
The first relay movement restricting portion is formed on a side surface substantially L-shape so as to be abutted on the side and bottom surfaces of the flange portion formed on a side surface of the relay,
Said second relay movement restricting portion is formed on the elastically deformable plate-shaped as a fulcrum a proximal end portion of the inner surface side of the prevention wall the twist is locked to the upper surface of the flange portion formed on the relay Having a locking piece
An electrical junction box characterized by that. In an electrical junction box with a housing for mounting a relay,
A first relay movement restricting portion that is in contact with a relay mounted on the housing and restricts horizontal movement along a mounting surface of the relay;
A second relay movement restricting portion that is locked to the relay mounted on the housing and restricts movement in a direction perpendicular to the mounting surface of the relay;
The first relay movement restricting portion and the second relay movement restricting portion are provided on the inner side surface of the kink preventing wall formed by being bent along the side surface of the mounted relay around the housing. ,
The first relay movement restricting portion is formed in an elastically deformable tongue shape, and is in contact with a side surface of a collar portion formed on a side surface of the relay,
Said second relay movement restricting portion is formed on the elastically deformable plate-shaped as a fulcrum a proximal end portion of the inner surface side of the prevention wall the twist is locked to the upper surface of the flange portion formed on the relay Having a locking piece
An electrical junction box characterized by that. The electrical junction box according to claim 1 , wherein the kink preventing wall is provided at a distance from the housing . 3. The electrical junction box according to claim 1, wherein the kink preventing wall is formed in the housing so as to surround the entire periphery of the relay .

Images