JP2009092116A - Engaging structure for connecting two members - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engaging structure for connecting two members capable of effectively preventing looseness of an engaging part, only by adding a simple constitution, without requiring surplus cost. <P>SOLUTION: This engaging structure is composed of a locking projection piece 21 and a locking frame 11, and requires to insert the locking projection piece into an opening 12 of the locking frame in an oblique attitude in the normal engaging direction when inserting the locking projection piece into the locking frame, and connects the two members so as to exhibit the engaging function when the locking projection piece turns round in the normal engaging direction from the oblique attitude when being put in the final engaging state. A bending tip part 21b becoming substantially parallel to the axis of the opening of the locking frame when putting the locking projection piece in the oblique attitude, is arranged on the tip of the locking projection piece, and when the locking projection piece turns round in the normal engaging direction by being put in the final engaging state, an inside part P of the bending tip part is brought into pressure contact with an edge part E of the opening of the locking frame. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  In the present invention, when one member such as a box (electrical connection box) is fixed to the other member (another box, vehicle body, or the like) to be attached by the engaging means, one of the engaging means The present invention relates to an engagement structure that connects two members that can be used as a member.

  For example, when attaching the electrical junction box to the vehicle body, first engagement means for engaging each other is provided at one end of the electrical junction box and the corresponding position on the vehicle body side, and the other end of the electrical junction box and the corresponding one. The electrical connection box is stably fixed by providing second engagement means that engage with each other at positions and taking engagement at two positions.

  In that case, both the first and second engaging means may be the same type of engaging means such as a type in which the bracket is fixed with a screw. A type (simple type) in which a locking protrusion is inserted into the stop hole is often employed (see, for example, Patent Document 1). This is because the engagement is simpler and less expensive.

  5 to 7 show an example of a conventional box mounting structure using such an engaging means. In this example, when the electrical connection box (box) 20 is attached and fixed to the attachment target member 10, the first engagement means is provided at one end of the electrical connection box 20 and the corresponding position on the attachment target member 10 side. As shown, a locking protrusion 121 and a locking frame 11 are provided. Moreover, the latching claw 25 and the latching arm 15 with the latching hole 16 are provided as a 2nd engagement means in the other end of the electrical connection box 20, and the position on the attachment object member 10 side corresponding to it.

  The locking frame 11 is erected substantially perpendicularly to the attachment surface (upper surface) of the attachment target member 10, and has an opening 12 whose axial direction is parallel to the attachment surface of the attachment object member 10. That is, the upper inner surface 12a and the lower inner surface 12b of the opening 12 are in a substantially parallel relationship with the mounting surface.

  The locking protrusion 121 protrudes straight from the side wall of the electrical connection box 20 in a direction substantially parallel to the bottom surface of the electrical connection box 20 placed on the mounting surface. When the mounting completion state shown in FIG. The projecting piece 121 is fitted in a posture parallel to the axis of the opening 12 of the locking frame 11.

  Further, the relationship between the locking claw 25 and the locking arm 15 provided on the other end side is that the locking claw 25 is engaged by tilting the electrical connection box 20 from the top toward the mounting surface of the mounting target member 10. While the stop arm 15 is bent, it fits into the locking hole 16 of the locking arm 15.

  By the way, in the case of such an attachment structure, the locking projection piece 121 must be inserted into the opening 12 of the locking frame 11 from the left direction in the figure, but the electric connection box 20 is inserted in a horizontal posture. Then, since the latching arm 15 interferes with the electrical junction box 20, it cannot be inserted.

Therefore, as shown in FIG. 6, first, the other end side of the electrical connection box 20 is kept in an inclined posture, and the locking protrusion 121 is inclined with respect to the normal engagement direction (the direction of FIG. 7). In the posture, it is inserted into the opening 12 of the locking frame 11 as shown by the arrow C2, and then the other end side of the electrical connection box 20 is tilted toward the mounting surface to engage the locking claw 25 and the locking arm 15. There is a need.
Japanese Utility Model Publication No. 7-42535

  However, when the locking protrusion 121 is inserted into the opening 12 of the locking frame 11 in such an oblique direction, a large gap must be secured between the opening 12 and the locking protrusion 121. The stop protrusion 121 cannot be inserted into the opening 12 of the locking frame 11.

  Therefore, as shown in FIG. 7, when the attachment of the electrical connection box 20 is completed and the locking projection 121 is turned to the normal engagement direction, the gap between the inner wall of the opening 12 and the locking projection 121 is obtained. The gap S remains, which causes a backlash.

  In order to prevent this, a rib that is crushed by a load at the time of engagement is provided on the side wall of the locking projection 121 or an elastic tape such as urethane foam tape is attached to the side wall of the locking projection 121 to fill the gap S. However, it is necessary to increase the material or add another member, which increases the cost.

  In consideration of the above circumstances, the present invention is an engagement structure that connects two members that can effectively prevent rattling of the engagement portion by adding a simple configuration without adding extra cost. The purpose is to provide.

  According to the first aspect of the present invention, the locking frame provided on one of the two members connected to each other, and the insertion of the locking frame provided on the other member are inserted into the opening of the locking frame. A locking protrusion that is restricted from moving in a direction to be moved, and at the tip of the locking protrusion, the locking protrusion is inserted into the opening at a first angle and then at a second angle. It is characterized in that a bent front end portion that presses against an edge portion of the opening of the locking frame is provided by changing.

  The invention according to claim 2 crosses the insertion direction by being provided on one of the two members connected to each other and on the other member and being inserted into the opening of the locking frame. A locking protrusion that is restricted from moving in the direction to be moved, and of the inner side wall of the opening of the locking frame, on the side that interferes when the locking protrusion is inserted into the opening at a first angle. After the inner wall is configured as an inclined wall inclined in a direction allowing insertion, and after the locking protrusion is inserted into the opening at the first angle in the inner wall of the inner wall configured as the inclined wall The pressure contact edge part which press-contacts to this latching protrusion is provided by changing the attitude | position to 2nd angle.

  According to the first aspect of the present invention, since the bent tip portion is provided at the tip of the locking projection piece, the tip of the locking projection piece is inclined even without providing a large gap between the opening and the locking projection piece. It can be easily inserted into the opening of the locking frame in the posture (first angle). In addition, when the locking projection piece is turned to the final engagement direction (second angle) with the locking projection piece inserted into the locking frame as far as it will go, the bent tip of the locking projection piece is engaged. Since it press-contacts to the edge part of the opening of a stop frame, a locking frame and a latching protrusion piece will engage without a clearance gap, and the engagement state without rattling can be maintained. Therefore, in order to fill the gap, there is no need to provide ribs that are crushed by the load at the time of engagement on the side wall of the locking projection piece, or to attach elastic tape such as urethane foam tape to the side wall of the locking projection piece. Further, it is possible to prevent rattling of the engaging portion without increasing the material or adding another member and without cost.

  According to the second aspect of the present invention, since the inner wall of the opening of the locking frame is configured as an inclined wall, the front end of the locking protrusion is slanted without providing a large gap between the opening and the locking protrusion. It can be easily inserted into the opening of the locking frame in the posture (first angle). In addition, when the locking projection piece is turned to the final engagement direction (second angle) in a state where the locking projection piece is inserted into the locking frame all the way, the locking projection piece is formed on the inner wall of the locking frame. Since it press-contacts to a press-contact edge part, a locking frame and a latching protrusion piece will be engaged without a clearance gap, and the engagement state without rattling can be maintained. Therefore, in order to fill the gap, there is no need to provide ribs that are crushed by the load at the time of engagement on the side wall of the locking projection piece, or to stick a tape such as urethane foam on the side wall of the locking projection piece. It is possible to prevent rattling of the engaging portion without increasing the cost or adding another member and without cost.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a side sectional view showing a state before the attachment structure of the electrical junction box adopting the engagement structure of the first embodiment as one of the engagement means, and FIG. 2 shows a state during the attachment of the attachment structure. FIG. 3 is a side sectional view showing a state when the attachment structure is completely attached.

  In this embodiment, when the electrical connection box (box) 20 is attached and fixed to the attachment target member 10, the first engagement is located at one end of the electrical connection box 20 and the corresponding position on the attachment target member 10 side. As a coupling means, a locking projection piece 21 and a locking frame 11 are provided. Moreover, the latching claw 25 and the latching arm 15 with the latching hole 16 are provided as a 2nd engagement means in the other end of the electrical connection box 20, and the position on the attachment object member 10 side corresponding to it.

  The locking frame 11 is erected substantially perpendicularly to the attachment surface (upper surface) of the attachment target member 10, and has an opening 12 whose axial direction is parallel to the attachment surface of the attachment object member 10. That is, the upper inner surface 12a and the lower inner surface 12b of the opening 12 are in a substantially parallel relationship with the mounting surface.

  The locking protrusion 21 protrudes straight from the side wall of the electrical connection box 20 in a direction substantially parallel to the bottom surface of the electrical connection box 20 placed on the mounting surface. When the mounting completion state shown in FIG. The projecting piece 21 is fitted in a posture parallel to the axis of the opening 12 of the locking frame 11.

  Further, the relationship between the latching claw 25 and the latching arm 15 provided on the other end side is that the latching claw 25 is formed by tilting the electric connection box 20 toward the mounting surface of the mounting target member 10 from above. While the locking arm 15 is bent, the locking arm 15 is fitted in the locking hole 16.

  Incidentally, in this case as well, due to the relationship between the electrical connection box 20 and the mounting target member 10 (specifically, in order to avoid interference between the electrical connection box 20 and the locking arm 15), the locking frame 11 is engaged. As shown in FIG. 2, when the stop protrusion 21 is inserted, the stop protrusion 21 is inserted into the opening 12 of the lock frame 11 in an oblique posture with respect to the normal engagement direction (the direction of FIG. 3). There must be.

  Therefore, in this embodiment, when the locking projection piece 21 is inclined at the tip of the locking projection piece 21 as shown in FIG. 2, it is substantially parallel to the axis of the opening 12 of the locking frame 11. A bent tip 21b is provided.

  The bent distal end portion 21b is provided on the front side of the proximal end portion 21a that is parallel to the axis of the opening 12 when the locking protrusion 21 is turned in the normal engagement direction. The bent distal end portion 21b is bent upward with respect to the base end portion 21a, and the bending angle θ is equal to the inclination angle of the electrical connection box 20 when the locking projection piece 21 is inserted into the locking frame 11. Is set.

  Then, as shown in FIG. 3, when the locking projection piece 21 is turned to the normal engagement direction by setting the final engagement state, the inner portion P of the bent tip portion 21 b is fixed to the locking frame 11. It is configured to be in pressure contact with the edge E of the opening 12.

  That is, as shown in FIG. 1, since the edge E of the opening 12 exists at the position L on the end surface opposite to the inlet side of the locking frame 11, the locking protrusion 21 fits properly on the locking frame 11. When this occurs, the start point (bending point) Pa of the inner side portion P of the bent tip 21b of the locking protrusion 21 is more than the position L of the end surface of the locking frame 11 where the edge E of the opening 12 exists. The position comes to the base end portion 21a side, so that the inner portion P of the bent distal end portion 21b is surely pressed against the edge E of the opening 12 of the locking frame 11. ing. This is because, if the position of the starting point Pa of the bent tip portion 21b completely penetrates the locking frame 11, the meaning of providing the bent tip portion 21b is lost.

  Next, the operation will be described.

  When attaching the electrical connection box 20 to the attachment target member 10, first, as shown in FIG. 2, the electrical connection box 20 is placed in an oblique posture with the other end side (the side with the locking claw 25) lifted. The stop projection piece 21 is inserted into the locking frame 11 in an oblique posture.

  At that time, the front end of the locking protrusion 21 is provided with a bent front end portion 21b that is bent in accordance with the inclination angle θ of the electrical connection box 20, so that the direction parallel to the mounting surface of the mounting target member 10 (arrow) The bending tip 21b can be inserted into the locking frame 11 in a posture parallel to the axis of the opening 12 simply by sliding in the A direction).

  When the distal end side of the locking protrusion 21 is inserted into the locking frame 11 to a certain extent, the electrical connection box 20 is rotated while using the inserted portion as a fulcrum, and is directed toward the upper surface (mounting surface) of the mounting target member 10. Push down as shown by arrow B. As a result, the locking protrusion 21 enters the interior of the opening 12 while rubbing against the inner surface of the opening 12, and the locking claw 25 and the locking arm 15 on the other end interfere with each other, so that the locking arm 15 is moved outward. As shown in FIG. 3, the locking claw 25 engages with the locking hole 16 of the locking arm 15 while bending.

  This state is a state where the attachment is completed, and when this state is reached, the inner side (upper surface portion) P of the bent tip 21b is engaged by the locking projection piece 21 turning from the oblique posture to the normal engagement direction. It presses against the edge E of the opening 12 of the retaining frame 11 and exhibits its original engagement function.

  As described above, since the distal end of the locking protrusion 21 is provided with the bent distal end portion 21b substantially parallel to the axis of the opening 12 of the locking frame 11 when the locking protrusion 21 is in an oblique posture, the opening Even without providing a large gap between 12 and the locking projection 21, the tip of the locking projection 21 can be easily inserted into the opening 12 of the locking frame 11 in an oblique posture.

  Further, when the locking projection 21 is turned to the final engagement direction with being inserted into the locking frame 11 as far as it will go, the inner portion P of the bent distal end portion 21b at the distal end of the locking projection 21 will be described. Is pressed against the edge E of the opening 12 of the locking frame 11, so that the locking frame 11 and the locking projection piece 21 are engaged with each other without a gap, and an engagement state without rattling can be maintained.

  Therefore, in order to fill the gap, it is necessary to provide ribs that are crushed by the load at the time of engagement on the side wall of the locking projection piece 21 or to attach an elastic tape such as urethane foam tape to the side wall of the locking projection piece 21. Therefore, it is possible to prevent rattling of the engaging portion without increasing the material or adding another member and without cost.

  In the above embodiment, the case where the bent tip portion is provided on the side of the locking protrusion is shown. However, like the engagement structure of the second embodiment shown in FIGS. The inner wall 112a of the opening 112 of the locking frame 111 on the side that interferes with the locking protrusion 121 when the locking protrusion 121 is inclined is aligned with the side wall of the locking protrusion 121 that is inclined. When the locking protrusion 121 is turned in the normal engagement direction by being configured as a slanted wall, and the final engagement state is established, the locking protrusion 121 becomes the edge E of the opening 112 of the locking frame 111. You may comprise so that it may press-contact to.

  In this case, the thickness of the locking protrusion 121 is smaller than the minimum height H1 of the opening 112 in order to generate a pressure contact force between the locking protrusion 121 and the locking frame 111 in the final engagement state. H2 is set larger. In addition, the inner wall 112a on the upper side of the opening 112 is configured as an inclined wall, while the lower inner wall 112b is configured as a wall parallel to the lower surface of the locking protrusion 121 that is turned in the normal engagement direction. Has been.

  In the case of this engagement structure, as long as the electric connection box 20 is kept in an oblique posture, the engagement protrusion 121 is provided with an engagement frame from an oblique direction as shown by an arrow C1 in FIG. 111, or as shown by an arrow C2, can be slid in a direction parallel to the mounting surface and inserted into the locking frame 111.

  As described above, according to this engagement structure, since the inner wall 112a of the opening 112 of the locking frame 111 is configured as an inclined wall, no large gap is provided between the opening 112 and the locking protrusion 121. However, the tip of the locking protrusion 121 can be easily inserted into the opening 112 of the locking frame 111 in an oblique posture. Further, when the locking projection 121 is turned to the final engagement direction with the locking projection 121 inserted into the locking frame 111 as far as it will go, the locking projection piece 121 becomes the edge of the opening 112 of the locking frame 111. Since it press-contacts to E, the latching frame 111 and the latching protrusion piece 121 will be engaged without gap, and the engagement state without rattling can be maintained.

  Therefore, in order to fill the gap, it is necessary to provide ribs that are crushed by the load at the time of engagement on the side wall of the locking projection piece 121, or to attach an elastic tape such as foamed urethane tape to the side wall of the locking projection piece 121. Therefore, it is possible to prevent rattling of the engaging portion without increasing the material and adding another member and without cost.

It is a sectional side view which shows the state before attachment of the attachment structure of the electrical junction box which employ | adopted the engagement structure of 1st Embodiment of this invention as one of the engagement means. It is a sectional side view which shows the state in the middle of attachment of the attachment structure. It is a sectional side view which shows the state at the time of the completion of attachment of the attachment structure. It is a figure which shows the engaging structure of 2nd Embodiment of this invention, (a) is before engagement, (b) is a sectional side view which shows the state after engagement. It is a sectional side view which shows the state before the attachment of the attachment structure of the conventional electrical junction box. It is a sectional side view which shows the state in the middle of attachment of the attachment structure. It is a sectional side view which shows the state at the time of the completion of attachment of the attachment structure.

Explanation of symbols

10 Attachment target member
11, 111 Locking frame 112a Inner side wall 12 Opening 20 Electric junction box (member)
21, 121 Locking protrusion 21b Bent tip P Inner portion E Edge of opening

Claims (2)

The locking frame provided in one of the two members connected to each other and the movement in the direction intersecting the insertion direction are regulated by being inserted into the opening of the locking frame provided on the other member. And consists of a locking protrusion
Bending to the edge of the opening of the locking frame by inserting the locking protrusion into the opening at a first angle and then changing the posture to the second angle at the tip of the locking protrusion An engagement structure for connecting two members, characterized in that a tip portion is provided. The locking frame provided in one of the two members connected to each other and the movement in the direction intersecting the insertion direction are regulated by being inserted into the opening of the locking frame provided on the other member. And consists of a locking protrusion
Among the inner walls of the opening of the locking frame, the inner wall on the side that interferes when the locking protrusion is inserted into the opening at a first angle is configured as an inclined wall that is inclined in a direction in which insertion is possible. Then, in the back of the inner wall configured as the inclined wall, the locking projection piece is inserted into the opening at the first angle, and then the posture is changed to the second angle to thereby change the locking projection piece. An engagement structure for connecting two members, characterized in that a press-contact edge portion for press-contact is provided.

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