JP2008223881A - Lock mechanism of resin molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To release a lock without using a special tool during dismantling. <P>SOLUTION: Breaking grooves 23 are formed on both sides of a male lock part of a surface plate of a cover 20 for breaking when pressed with a predetermined force or more and displacing the male lock downward. A female lock part having a step H is provided further downward than an upper end of a side wall of a main body. The female lock part includes a lock frame 16 having a slot 17 and a recessed part 18 on a lower face of the lock frame 16. The male lock part 25 includes an insertion piece 26 inserted into the slot 17 and an engagement pawl 28 on the outer face of the insertion piece 26. A tip end 28a of the engagement pawl 28 in the inserting direction is connected to the outer face of the insertion piece 26 via a hinge 27, and is oscillatable with the hinge as the fulcrum within a face perpendicular to the outer face of the insertion piece 26. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a resin molded product such as a protector for a wire harness, and more particularly to a lock mechanism provided in the resin molded product.

  As a lock mechanism of the protector, for example, the one described in Patent Document 1 is known. 9 and 10 are cross-sectional views showing the structure of the lock mechanism of the protector described in Patent Document 1. FIG. 9 and 10, reference numeral 110 denotes a protector body, and 120 denotes a protector cover that closes the upper surface opening. The protector main body 110 is provided with a female lock portion 115, and the protector cover 120 is provided with a male lock portion 125 that locks with the female lock portion 115.

  The female lock portion 115 on the protector body 110 side includes a lock frame 116 having a slot 117 penetrating in a direction in which the cover 120 is aligned with the protector body 110, and a recess 118 formed continuously on the lower surface of the lock frame 116 with the slot 117. ,have.

  The male lock portion 125 on the protector cover 120 side is provided on the lock arm 126 inserted into the slot 117 and the outer surface of the lock arm 126. When the lock arm 126 is inserted into the slot 117, the lock arm 126 is bent and deformed. However, the shape of the lock arm 126 is restored in the state of being pushed through to the lower surface side of the lock frame 116, so that it fits into the recess 118, and the upper wall of the recess 118 and the rear end wall of the recess 118 are engaged in this state. Thus, the locking arm 126 has a locking claw 127 that prevents the locking arm 126 from coming out of the slot 117 and generates a locking force.

  In the case of this protector, when the protector cover 120 is put on the protector main body 110, the locking claw 127 interferes with the lock frame 116 as the lock arm 126 is inserted into the slot 117. The locking claw 127 penetrates to the lower surface side of the lock frame 116. Then, when the shape of the lock arm 126 is restored in the protruding state, the locking claw 127 is received in the recess 118, and the upper wall of the recess 118 and the rear end wall of the locking claw 127 are engaged in this state. As a result, the lock arm 126 is prevented from coming out of the slot 117, and a locking force is generated.

  Further, when releasing the lock, a tool or the like is inserted into the recess 118 and the lock arm 126 is bent inward as shown in FIG. 9, and the locking claw 127 is released from the recess 118 in this state. By pulling 120 upward, the lock arm 126 comes out of the lock frame 116 and the lock is released.

JP 2006-191760 A

  Since the above-described conventional lock mechanism has to use a tool or the like when unlocking, there is a possibility that the work becomes troublesome when the disassembly work is performed for the purpose of recycling the wire harness or the like. Further, in the conventional lock mechanism, the lock arm 126 is bent to be locked and unlocked, so that the lock frame 116 is enlarged and the size of the protector itself tends to be increased. In a case where a wiring route for the wire harness is secured in a narrow space in a recent vehicle, the protector may be disabled.

  The present invention has been made in view of the above-mentioned circumstances, and the object thereof is to release the lock without using a special tool at the time of disassembly and to reduce the size of the resin molded product as much as possible. It is providing the resin molded product provided with the lock mechanism which can be performed.

In order to achieve the object described above, the resin molded product according to the present invention is characterized by the following (1) to (4).
(1) the main body,
A cover,
A female lock portion provided on an outer surface of the side wall of the main body, and a female lock portion and a lockable male lock portion, which are continuously provided downward on a side edge portion of the face plate of the cover, A lock mechanism that locks the main body and the cover with the side edge of the face plate of the cover placed on the upper end;
A resin molded product comprising
On both sides of the male lock part of the face plate of the cover, when the male lock part is pressed downward with a force of a predetermined value or more, a breaking groove is formed that displaces the male lock part downward,
The female lock portion includes a lock frame having a slot penetrating in a direction in which the cover is fitted to the main body, and a recess formed continuously on the lower surface of the lock frame with the slot,
The male lock part is
A tongue-like insertion piece inserted into the slot;
Provided on the outer surface of the insertion piece, when the insertion piece is inserted into the slot, the lock frame is bent and deformed to penetrate the lower surface side of the lock frame, and the shape of the lock frame is restored in the state of the penetration. A locking claw that fits in the recess and engages the upper end wall of the recess and the rear end wall of the recess so as to prevent the insertion piece from coming out of the slot and generate a locking force;
Having
(2) In the resin molded product having the configuration of (1) above,
The female lock part is provided below the upper end of the side wall of the main body with a step that can allow the female lock part to be displaced downward when the breaking groove is broken.
(3) In the resin molded product having the configuration (1) or (2),
The locking claw has a tip in the insertion direction of the insertion piece into the slot connected to the outer surface of the insertion piece via a hinge, and the hinge in a plane perpendicular to the outer surface of the insertion piece. It should be swingable at the fulcrum.
(4) In the resin molded product having any one of the constitutions (1) to (3),
The said main body is a protector main body which protects a wire harness, and the said cover is a protector cover which closes the opening surface of the said protector main body.

In the resin molded products having the above configurations (1) to (3), when the cover is put on the main body, the side edge portion of the face plate of the cover rides on the upper end of the side wall of the main body, and the female lock portion and the male lock portion are engaged in this state. Then, the cover and the main unit lock. That is, the insertion piece of the male lock portion is inserted into the slot of the lock frame of the female lock portion, and accordingly, the locking claw provided on the outer surface of the insertion piece penetrates the lower surface side of the lock frame while bending and deforming the lock frame. Then, when the shape of the lock frame is restored in the protruding state, the locking claw is received in the recess, and in this state, the upper surface wall of the recess and the rear end wall of the locking claw are engaged with each other. Is prevented from coming out of the slot, and a locking force is generated.
At this time, in particular, in the resin molded product having the configuration (3), since the front end in the insertion direction is connected to the insertion piece by the hinge, the rear end side is inserted into the slot together with the insertion piece. Is positioned at the rear side in the insertion direction, and enters the slot in a posture along the insertion piece, and goes through the slot. Then, when the lock frame passes through the slot, the lock frame is elastically restored, so that the locking claw fits into a recess formed continuously with the slot, and the upper end wall of the recess and the rear end wall of the locking claw within the recess. Engage with each other to generate a locking force. In this state, even if a lifting force is applied to the cover, the locking claw remains in the recess, so that the lock cannot be released.
Next, when unlocking at the time of dismantling, the male lock portion is pressed with a predetermined force or more. If it does so, the fracture | rupture groove | channel on both sides of a male lock part will fracture | rupture, and it becomes possible to push down a male lock part. Here, in particular, in the resin molded product having the configuration (2), the female lock portion is disposed on the lower side with a predetermined step from the upper end of the side wall of the main body. Will be displaced. Then, as the insertion piece of the male lock part is displaced downward, the locking claw pops out from the concave part, and the restriction by the concave part is released and becomes free, so that the locking claw moves downward with the hinge as a fulcrum. Swing to reverse the orientation when inserted. Then, lift the cover as it is. Then, the rear end wall of the latching claw is in the direction opposite to the pulling direction, so that the latching claw enters the slot with the hinge at the head, and the lock frame is bent and deformed, so that the lock claw penetrates above the lock frame. Therefore, the locking claw comes off without being caught by the upper end wall of the recess, and the lock is released.
In this way, the lock can be released simply by pulling down the male lock part by hand and then pulling up the cover, so that unnecessary tools are not required and the disassembly work can be easily performed in a short time. Further, since locking and unlocking are performed exclusively using the bending of the lock frame, not the bending of the male lock portion, the size of the locking mechanism can be kept to a minimum, and for example, the protector can be miniaturized. In addition, since it is not necessary to break and remove the lock mechanism portion, small fragments do not scatter and there is no concern that resin pieces will be mixed into, for example, an electric wire to be recycled. Accordingly, it is possible to improve the accuracy of material separation when reusing resources.
Moreover, according to the resin molded product of the structure of said (4), since said lock mechanism was provided between the protector main body and the protector cover, removal of a protector can be made easy.

  According to the present invention, the lock can be released without using a special tool when the resin molded product is disassembled, and the size of the resin molded product can be made as small as possible.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading through the best mode for carrying out the invention described below with reference to the accompanying drawings.

  Hereinafter, as a preferred embodiment of the present invention, a protector provided with a lock mechanism will be described with reference to the drawings.

  1A and 1B are configuration diagrams of a main body of a protector according to an embodiment of the present invention. FIG. 1A is a plan view and FIG. 1B is a side view. 2 (a) and 2 (b) are configuration diagrams of the protector cover, in which FIG. 2 (a) is a plan view and FIG. 2 (b) is a side view. 3 (a) is an enlarged view of the portion indicated by arrow III in FIG. 1 (a), FIG. 3 (b) is a side view of FIG. 3 (a), and FIG. 3 (c) is IIIc in FIG. 3 (b). It is -IIIc arrow sectional drawing. 4 (a) is an enlarged view of a portion indicated by an arrow IV in FIG. 2 (a), FIG. 4 (b) is a side view of FIG. 4 (a), and FIG. 4 (c) is IVc in FIG. 4 (b). It is -IVc arrow sectional drawing. 5 to 8 are cross-sectional views of the lock mechanism for explaining the operation when releasing the lock.

  This protector is a resin molded product provided with a synthetic resin protector body 10 shown in FIGS. 1A and 1B and a synthetic resin protector cover 20 shown in FIGS. 2A and 2B. is there. The protector body 10 has a U-shape having a bottom wall 11 and left and right side walls 12, and the protector cover 20 has a face plate 21 that closes the upper surface opening of the protector body 10.

  The protector main body 10 and the protector cover 20 are provided with a total of four lock mechanisms, each consisting of a pair of a female lock portion 15 and a male lock portion 25, at right and left intervals. The female lock portion 15 is formed integrally with the protector body 10, and the male lock portion 25 is formed integrally with the protector cover 20. More specifically, the female lock portion 15 is provided on the outer surface of the side wall 12 of the protector body 10, and the male lock portion 25 is connected downward to the left and right side edge portions of the face plate 21 of the protector cover 20. The protector body 10 and the protector cover are engaged by engaging the female lock part 15 and the male lock part 25 with the side edge of the face plate 21 of the protector cover 20 placed on the upper end 12a of the side wall 12 of the protector body 10. 20 can be locked.

  As shown in FIGS. 4A and 4B, the face plate 21 is positioned on both sides of the male lock portion 25 on the lower surface of the face plate 21 of the protector cover 20 when the male lock portion 25 is pressed downward with a predetermined force or more. Are partially broken, and the breaking grooves 23 for displacing the male lock portion 25 downward are formed in parallel to each other.

  Further, as shown in FIGS. 3A to 3C, the female lock portion 15 has a step H that can allow the breakage groove 23 on the protector cover 20 side to break and the male lock portion 25 to be displaced downward. And provided below the upper end 12a of the side wall 12 of the protector body 10.

  The female lock portion 15 includes a rectangular small flange-shaped lock frame 16 having a slot 17 penetrating the protector cover 20 in a direction in which the protector cover 20 is fitted to the protector body 10, and a recess formed continuously with the slot 17 on the lower surface of the lock frame 16. 18.

  Further, as shown in FIGS. 4A to 4C, the male lock portion 25 includes a tongue-like insertion piece 26 to be inserted into the slot 17, and a locking claw 28 provided on the outer surface of the insertion piece 26. have. When the insertion piece 26 is inserted into the slot 17, the locking frame 28 pierces to the lower surface side of the lock frame 16 while bending and deforming the lock frame 16. 18, and the upper end wall of the recess 18 and its rear end wall 28 b engage with each other in this state, thereby preventing the insertion piece 26 from coming out of the slot 17 and generating a locking force. .

  The locking claw 28 in this case is perpendicular to the outer surface of the insertion piece 16 by connecting the distal end 28a in the insertion direction of the insertion piece 26 into the slot 17 to the outer surface of the insertion piece 26 via the thin hinge 27. It is provided so as to be rotatable around the hinge 27 in the plane (that is, swingable about the hinge 27 as a fulcrum).

  Next, the operation will be described. When the protector cover 20 is put on the protector body 10, the side edges of the face plate 21 of the protector cover 20 are placed on the upper end 12a of the side wall 12 of the protector body 10, and the female lock part 15 and the male lock part 25 are engaged in this state. The protector cover 20 and the protector body 10 are locked. In other words, the insertion piece 26 of the male lock portion 25 is inserted into the slot 17 of the lock frame 16 of the female lock portion 15. It penetrates to the lower surface side of the lock frame 16. When the shape of the lock frame 16 is restored in the protruding state, the locking claw 28 is received in the recess 18, and in this state, the upper surface wall of the recess 18 and the rear end wall 28 b of the locking claw 28 are engaged. By doing so, the insertion piece 26 is prevented from coming off from the slot 17 and a locking force is generated. FIG. 5 shows this locked state.

  At this time, since the front end 28a in the insertion direction is connected to the insertion piece 26 by the hinge 27, when the locking claw 28 is inserted into the slot 17 together with the insertion piece 26, the rear end side is set to the rear side in the insertion direction. It moves into the slot 17 in a position along the insertion piece 26 and moves through the slot 17. When the lock frame 16 is elastically restored after passing through the slot 17, the locking claw 28 is received in the recess 18 formed continuously with the slot 17, and the upper end wall of the recess 18 is formed in the recess 18. The rear end wall 28b of the latching claw 28 is engaged to generate a locking force. Even if a lifting force is applied to the protector cover 20 in this state, the locking claw 28 remains in the recess 18 and cannot be unlocked.

  Next, when unlocking at the time of disassembly, as shown by an arrow A in FIG. 6, the male lock portion 25 is pressed with a predetermined force or more from the state of FIG. 5. If it does so, the fracture | rupture groove | channel 23 of the both sides of the male lock part 25 will fracture | rupture, and the male lock part 25 can be pushed down now. Here, since the female lock portion 15 is disposed on the lower side with a predetermined step H provided from the upper end 12a of the side wall 12 of the protector body 10, the male lock portion 25 is displaced downward by the step H. . Then, as the insertion piece 26 of the male lock portion 25 is displaced downward, the locking claw 28 protrudes downward from the concave portion 18, and the restriction by the concave portion 18 is released and becomes free. It pivots downward about the hinge 27 and is in the opposite direction to the posture at the time of insertion.

  Therefore, the protector cover 20 is pulled up in the direction indicated by the arrow B in FIG. Then, the rear end wall 28b of the locking claw 28 is in the opposite direction (downward in the figure) to the pulling direction (arrow A direction), so that the locking claw 28 enters the slot 17 with the hinge 27 at the head, The frame 16 is deflected and deformed, and it passes through the upper side of the lock frame 16. Therefore, as shown in FIG. 8, the latching claw 28 comes out without being caught by the upper end wall of the recess 18, and the lock is released.

  In this way, the lock can be released by simply pulling up the protector cover 20 after the male lock portion 25 is pushed down by hand, so that unnecessary tools are not required and the disassembly work can be easily performed in a short time. Can do. Further, since the locking and unlocking are performed using the bending of the lock frame 16 instead of the bending of the male lock portion 25, the size of the lock mechanism can be minimized, and the protector can be downsized. In addition, since it is not necessary to break and remove the lock mechanism portion, small fragments do not scatter and there is no concern that resin pieces will be mixed into, for example, an electric wire to be recycled. Accordingly, it is possible to improve the accuracy of material separation when reusing resources.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

1A and 1B are configuration diagrams of a main body of a protector according to an embodiment of the present invention. FIG. 1A is a plan view and FIG. 1B is a side view. 2 (a) and 2 (b) are configuration diagrams of the protector cover, in which FIG. 2 (a) is a plan view and FIG. 2 (b) is a side view. 3 (a) is an enlarged view of a portion indicated by arrow III in FIG. 1 (a), FIG. 3 (b) is a side view of FIG. 3 (a), and FIG. 3 (c) is IIIc in FIG. 3 (b). It is -IIIc arrow sectional drawing. 4 (a) is an enlarged view of a portion indicated by an arrow IV in FIG. 2 (a), FIG. 4 (b) is a side view of FIG. 4 (a), and FIG. 4 (c) is IVc in FIG. 4 (b). It is -IVc arrow sectional drawing. It is sectional drawing which shows the state at the time of the locking of the locking mechanism of embodiment of this invention. It is sectional drawing which shows the state which pushed down the male locking part in order to cancel | release the locked state of FIG. It is sectional drawing which shows the state which pulled up the protector cover following the state of FIG. It is sectional drawing which shows the state which cancelled | released the locked state completely. It is sectional drawing which shows the state when initial operation for the lock release of the conventional lock mechanism is performed. Next, it is a cross-sectional view showing a state when the cover is pulled up and the lock is completely released.

Explanation of symbols

10: Protector body 12: Side wall 12a: Upper end 15: Female lock part 16: Lock frame 17: Slot 18: Recess 20: Protector cover 21: Face plate 23: Breaking groove 25: Male lock part 26: Insert piece 27: Hinge 28: Locking Claw 28a: Front end 28b: Rear end wall

Claims (4)

The body,
A cover,
A female lock portion provided on an outer surface of the side wall of the main body, and a female lock portion and a lockable male lock portion, which are continuously provided downward on a side edge portion of the face plate of the cover, A lock mechanism that locks the main body and the cover with the side edge of the face plate of the cover placed on the upper end;
A resin molded product comprising
On both sides of the male lock part of the face plate of the cover, when the male lock part is pressed downward with a force of a predetermined value or more, a breaking groove is formed that displaces the male lock part downward,
The female lock portion includes a lock frame having a slot penetrating in a direction in which the cover is fitted to the main body, and a recess formed continuously on the lower surface of the lock frame with the slot,
The male lock part is
A tongue-like insertion piece inserted into the slot;
Provided on the outer surface of the insertion piece, when the insertion piece is inserted into the slot, the lock frame is bent and deformed to penetrate the lower surface side of the lock frame, and the shape of the lock frame is restored in the state of the penetration. A locking claw that fits in the recess and engages the upper end wall of the recess and the rear end wall of the recess so as to prevent the insertion piece from coming out of the slot and generate a locking force;
A resin molded product characterized by comprising:   The female lock part is provided below the upper end of the side wall of the main body with a step which can allow the female lock part to be displaced downward when the fracture groove is broken and the male lock part is displaced downward. 1. The resin molded product described in 1.   The locking claw has a distal end in the insertion direction of the insertion piece into the slot connected to the outer surface of the insertion piece via a hinge, and the hinge in a plane perpendicular to the outer surface of the insertion piece. The resin molded product according to claim 1 or 2, wherein the resin molded product is swingably provided at a fulcrum.   The said main body is a protector main body which protects a wire harness, The said cover is a protector cover which closes the opening surface of the said protector main body, The resin molding as described in any one of Claims 1-3 characterized by the above-mentioned. Goods.

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