JP5454486B2 - Lock structure - Google Patents

Description

  The present invention relates to a lock structure for a main body and a lid made of a resin molded product, and more specifically, in a lock structure for a protector main body and a lid for inserting and protecting a wire harness routed in a vehicle, and reducing the operating force when locking and In addition to making it difficult to be half-fitted, the holding force of the lock is increased.

  Conventionally, a protector made of a resin molded product is externally mounted on a wire harness routed in an automobile to protect the wire harness and restrict the route. In many cases, the protector is configured such that a wire harness is passed through a bowl-shaped main body, and then a lid is covered, and a lock portion provided on the lid is locked to a locked portion provided on the main body.

  For example, as shown in FIGS. 7A to 7D, a lock claw 102 serving as a locked portion projects from the upper end outer surface of the side wall 101 of the main body 100, while a lock frame 111 serving as a lock portion is provided on the lid 110. Provided. In the lock structure, the lock claw 102 is moved over the lower frame 111a of the lock frame 111 of the lid 110, the lock claw 102 is inserted into the hollow portion 112 of the lock frame 111, and the lock claw 102 is engaged with the lower frame 111a of the lock frame. The lid 110 is lock-coupled to the main body 100.

  In the lock structure shown in FIG. 7, as shown in FIG. 7B, the lower frame 111a of the lock frame 111 is likely to remain in a semi-fitted state where it does not get caught in the lock claw 102 and fall into the hollow portion 112. It is easy to come off when it is in the fitted state. Further, when the lock frame 111 is easily damaged and the lid 110 is pushed by the internal wire harness and a load in the releasing direction is applied, the lock claw 102 is bent while the lock frame 111 is bent as shown in FIG. There is a risk of falling out.

  Further, as shown in FIG. 8, the lock structure proposed in Japanese Patent Application Laid-Open No. 8-296621 is substantially the reverse of the lock structure, and a lock frame 120 is provided on the main body 100, and the lid 110 is made flexible. A lock piece 132 is provided with a lock claw 131 projecting therefrom. The lock piece 132 is inserted into the lock frame 120, and the lock claw 131 is locked to the lower frame of the lock frame 120 for lock connection.

  The lock structure of FIG. 8 may also be in a semi-fitted state, and if the lid is pushed in the opening direction by the internal wire harness in this state, the lid is easily removed.

JP-A-8-296621

  As described above, in the conventional lock structure, when the lid is pushed away from the main body by the inner member, the lid may be bent while being bent. Further, there is a problem that the unlocking cannot be easily performed when the unlocking is necessary to make it difficult to release the lock, and the unlocking jig is necessary.

  The present invention has been made in view of the above problems. In the lock structure of the protector main body and the lid, etc., the lock structure is less likely to be semi-fitted, has a high holding force of the lock coupling portion, and can be easily unlocked. It is an issue to provide.

In order to solve the above problems, the present invention is a lock structure of a main body and a lid made of a resin molded product,
A pair of left and right cuts are provided on the side wall of the main body from the upper end surface to provide a flexible piece, and a locking claw is provided on the outer surface of the flexible piece to provide a lance-shaped male lock portion. A holding frame that straddles the flexible piece from the outer outer surface of the notch is provided, and an insertion space is provided between the holding frame and the locking claw, while a locking hole is provided in the lid. The female lock part which becomes
The locking frame of the female lock part is pushed into the insertion space between the male lock part and the holding frame, the lower frame of the locking frame is moved over the locking claw, and locked to the lower surface of the locking claw. A lock structure is provided in which a stop portion is surrounded by the holding frame and the lower portion of the flexible piece protrudes from the lower end of the holding frame.

  It is preferable that the main body and the lid are a main body and a lid of a protector sheathed on the wire harness, or a main body and a lid of an electrical junction box.

  As described above, since the male lock portion provided on the main body is a lance-shaped flexible piece and a holding frame is provided surrounding the flexible piece, when the female lock portion of the lid is coupled to the male lock portion of the main body, the holding frame is Since it becomes an insertion guide for the female lock part and the male lock part bends, it can be easily and reliably locked.

  Specifically, when locking, when the locking frame of the female locking part provided on the lid gets over the locking claw of the male locking part of the main body, the flexible piece provided with the locking claw bends inward, so low insertion force Thus, the locking claw can be moved over and the locking frame can be locked to the locking surface on the lower surface of the locking claw. Thus, since the latching claw is provided on the flexible piece, the insertion force at the time of locking can be reduced, and damage to the female lock part and the male lock part at the time of locking can be prevented. In addition, since the returning force acts on the bent flexible piece, the locking frame is slid along the inclined surface of the locking claw, and the locking frame is securely dropped on the locking surface on the lower surface of the locking claw. This can prevent the half-fitted state from occurring.

  Furthermore, since the lock coupling state where the locking frame of the lid is locked to the locking surface of the lower surface of the locking claw of the main body is surrounded by the holding frame of the main body, a load in the unlocking direction acts on the locking frame of the lid. However, since the locking frame is surrounded by the holding frame, the locking frame cannot be moved, and unlocking can be reliably prevented.

  Furthermore, when unlocking is necessary, pressing the outer surface of the flexible piece located below the holding frame inwardly causes the flexible piece to bend inward, so that the locking frame is pulled from the lower surface of the locking claw. And can be easily unlocked.

  As described above, when the lock structure of the present invention is used for the lock structure of the protector main body and the cover that is externally mounted on the wire harness arranged in the automobile, the protector cover is loaded in the opening direction by the wire harness inserted inside. Therefore, the lock structure of the present invention that can increase the holding force of the lock portion is particularly effective.

  As described above, the lock structure of the present invention inserts the female lock portion between the male lock portion and the holding frame when the female lock portion provided on the lid is coupled to the male lock portion provided on the main body. The insertion force can be reduced because the male lock portion is accurate and has a lance shape. Therefore, it is possible to perform the lock coupling without difficulty and to prevent the occurrence of half-fitting and to prevent the lock portion from being damaged. And since the lock | rock coupling | bond part is enclosed by the holding frame, it has various advantages, such as a female | scalpel lock part not bend | curving and being able to prevent a lock | rock release reliably.

(A) is a perspective view which shows the state which locked the lid | cover to the main body of the protector of embodiment of this invention, (B) is a principal part enlarged view of (A). The male lock | rock part of the main body of the said embodiment is shown, (A) is a perspective view, (B) is sectional drawing. It is a perspective view which shows the female lock part of the lid | cover of the said embodiment. (A)-(F) is drawing which shows the locking process of the male locking part and female locking part of the said embodiment. It is sectional drawing which shows the state which cannot be removed even if a load is applied to the lid opening direction of the embodiment. It is sectional drawing which shows the lock release effect | action of the said embodiment. (A)-(D) are drawings which show a prior art example. It is a perspective view which shows another prior art example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
An embodiment is shown in FIGS.
The embodiment is applied to a lock structure between a main body and a lid of a protector of a wire harness arranged in an automobile.

  The main body 2 and the lid 3 of the protector 1 are made of a resin molded product. The main body 2 has a bowl shape with an upper opening, side walls 2b and 2c are erected from both sides of the bottom wall 2a in the width direction, and one side wall 2c and the lid 3 are connected via a thin hinge portion 4. A lock coupling portion is provided between the other side wall 2 b and the lid 3. In the lock coupling portion, the male lock portion 6 provided on the outer surface at the upper end of the side wall 2b of the main body and the female lock portion 7 provided downward from the end surface in the width direction of the lid are coupled.

  As shown in FIG. 2, the male lock portion 6 provided in the main body 2 is provided with a pair of left and right cuts 10A and 10B from the upper end surface of the side wall 2b, and a flexible piece 11 is provided between the cuts 10A and 10B. A locking claw 12 is projected from the upper end outer surface of the flexible piece 11. The flexible piece 11 can be bent inward and outward with the lower end 11a as a fulcrum, and the locking claw 12 provided at the upper end of the flexible piece 11 can be greatly bent inward. In this way, the locking claw 12 protrudes from the tip of the flexible piece 11 to form a lance-shaped male lock portion 6. The locking claw 12 is inclined so as to expand outward from the upper end of the flexible piece 11, and the lower surface of the locking claw 12 at the tip of the inclined portion 12a is used as a locking surface 12b.

  Further, a U-shaped holding frame 13 is provided so as to project from the outer outer surface of the pair of left and right cuts 10 </ b> A and 10 </ b> B, and the flexible piece 11 is surrounded by the holding frame 13. An insertion space 15 is provided between the holding frame 13 and the locking claw 12, and the width S of the insertion space 15 is narrower than the thickness t of the locking frame 20 of the female lock portion 7 provided in the lid 3. .

  Further, the lower end 11 a of the flexible piece 11 is positioned below the lower end 13 a of the holding frame 13. Thereby, at the time of unlocking, an operator can press the flexible piece 11 inward from below the holding frame 13.

  As shown in FIG. 3, the female lock portion 7 that protrudes downward from the end surface in the width direction of the lid 3 includes the locking frame 20 having a substantially square shape. The hollow portion 22 surrounded by the locking frame 20 becomes an insertion space for the locking claw 12. The upper surface 21 a of the lower frame 21 of the locking frame 20 is brought into contact with and locked to the lower surface of the locking claw 12 of the male lock portion 6 of the main body 2 so that the female lock portion 7 is locked to the male lock portion 6. Yes. The lower frame 21 of the locking frame 20 is provided with a tapered portion 21b that reduces the thickness toward the lower end so that it can be easily inserted into the insertion space 15.

  The protector 1 inserts a wire harness (not shown) into the main body 2, rotates the lid 3 to cover the upper end opening of the main body 2, and then locks the female lock portion 7 of the lid 3 to the male lock portion 6 of the main body 2. Are connected.

The lock coupling step is shown in FIGS.
First, as shown in FIG. 4A, the lower frame 21 of the locking frame 20 of the female lock portion 7 of the lid 3 is inserted into the insertion space 15 between the male lock portion 6 and the holding frame 13 of the main body 2. At that time, since the tapered portion 21b is provided at the lower portion of the lower frame 21, the locking claw 12 protrudes from the upper end side of the insertion space 15, but can be inserted relatively easily. As shown in FIGS. 4B, 4C, 4D, and 4E, the inserted lower frame 21 is in sliding contact with the inclined outer surface of the locking claw 12, and the outer surface of the lower frame 21 is It contacts the inner surface of the holding frame 13. Since the holding frame 13 does not bend with respect to the side wall 2 b, the flexible piece 11 provided with the locking claw 12 is gradually bent inward gradually according to the protrusion of the locking claw 12. At the position shown in FIG. 4E, the lower frame 21 comes into contact with the maximum protrusion of the locking claw 12, and the amount of bending of the flexible piece 11 is maximized.

  When the lower frame 21 of the locking frame 20 gets over the locking claw 12, the lower frame 21 falls to the locking surface 12 b on the lower surface of the locking claw 12 as shown in FIG. The upper surface 21a is brought into contact with and locked with the locking surface 12b on the lower surface of the locking claw 12, and is locked.

  In the step of inserting the female lock portion 7 into the male lock portion 6 shown in FIGS. 4A to 4F, the locking frame 20 of the female lock portion 7 is guided by the holding frame 13 and inserted into the insertion space 15. Therefore, the locking frame 20 can be lowered straight without tilting, and the locking claw 12 protrudes from the flexible piece 11, so that the insertion force can be reduced by bending the locking claw 12. Reduction can be achieved, and insertion workability can be improved.

  Further, as shown in FIG. 5, the lid 3 is pushed upward by the wire harness inserted therein, and the lower frame 21 of the locking frame 20 of the female lock portion 7 bends outward in the direction of releasing from the locking claw 12. Force may be applied. In that case, the holding frame 13 projecting from the main body 2 surrounds the lower frame 21 and the holding frame 13 does not bend. Therefore, the lower frame 21 slides to the outside of the locking surface 12b of the locking claw 12 and moves outward. Can not bend. Therefore, the lock is not released and the lock coupling force can be increased.

  On the other hand, when it is necessary to release the lock, as shown in FIG. 6, the worker pushes the lower part of the flexible piece 11 extending downward from the holding frame 13 inward. By this operation, the upper part where the locking claw 12 of the flexible piece 11 protrudes greatly bends inward. Thereby, the lower frame 21 of the locking frame 20 of the lid 3 can be removed from the locking claw 12, and unlocking can be easily performed without a jig.

Although the said embodiment makes object the protector exterior to a wire harness, it is used suitably also for the lock coupling | bonding of the main body and lid | cover of an electrical connection box connected with the wire harness routed to a motor vehicle. In this case, the structure of the lock coupling portion is the same as that of the above embodiment, and a lance-shaped male lock portion may be provided on the main body, and a female lock portion may be provided on the lid.
Since the configuration of the male lock portion 6 and the female lock portion 7 is the same as that of this embodiment, the description thereof is omitted.

DESCRIPTION OF SYMBOLS 1 Protector 2 Main body 3 Cover 6 Male lock part 7 Female lock part 10A, 10B Cut 11 Flexible piece 12 Locking claw 13 Holding frame 15 Insertion space 20 Locking frame 21 Lower frame

Claims (2)

It is a lock structure of the body and lid made of resin molded products,
A pair of left and right cuts are provided on the side wall of the main body from the upper end surface to provide a flexible piece, and a locking claw is provided on the outer surface of the flexible piece to provide a lance-shaped male lock portion. A holding frame that straddles the flexible piece from the outer outer surface of the notch is provided, and an insertion space is provided between the holding frame and the locking claw, while a locking hole is provided in the lid. The female lock part which becomes
The locking frame of the female lock part is pushed into the insertion space between the male lock part and the holding frame, the lower frame of the locking frame is moved over the locking claw, and locked to the lower surface of the locking claw. A lock structure characterized in that a stop portion is surrounded by the holding frame and the lower portion of the flexible piece protrudes from the lower end of the holding frame.   The lock structure according to claim 1, wherein the main body and the lid are a main body and a lid of a protector that is externally mounted on a wire harness, or a main body and a lid of an electrical junction box.

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