JP6044933B2 - Lock structure - Google Patents

Description

  The present invention relates to a lock structure including a lock protrusion and a lock arm.

  Conventionally, a lock structure including a lock protrusion and a lock arm has been used to fix an article and another article (see, for example, Patent Document 1). FIG. 5 is a perspective view of a lock protrusion and a lock arm constituting a conventional lock structure. FIG. 6 is an explanatory view for explaining a state when the lock protrusion and the lock arm shown in FIG. 5 are engaged.

  A lock structure 301 shown in FIG. 5 includes a lock protrusion 302 protruding from an article (not shown) and a lock arm 303. The lock arm 303 has an elastically deformable piece 4 that is connected to another article (not shown) in a cantilever manner, and a protrusion 5 that protrudes from the surface of the elastically deformable piece 4. The lock arm 303 engages with the lock protrusion 302 as shown in FIG. 6C by moving in the arrow K direction of FIG.

  The lock protrusion 302 and the protrusion 5 of the lock arm 303 have opposing surfaces 20 and 50 and taper surfaces 21 and 51 that face each other in the engaged state.

  The taper surface 21 of the lock protrusion 302 includes a first taper surface 21a that is separated from the facing surface 20, and a second taper surface 21b that is located between the facing surface 20 and the first taper surface 21a. The second taper surface 21b forms an angle with respect to both the facing surface 20 and the first taper surface 21a. Further, the second tapered surface 21b and the facing surface 20 are substantially perpendicular.

  The taper surface 51 of the protrusion 5 has a first taper surface 51a that is separated from the facing surface 50, and a second taper surface 51b that is located between the facing surface 50 and the first taper surface 51a. The second taper surface 51b forms an angle with respect to both the facing surface 50 and the first taper surface 51a. The second taper surface 51b and the facing surface 50 are substantially perpendicular.

  When the lock protrusion 302 and the lock arm 303 are engaged with each other, the lock arm 303 and the other article move with respect to the lock protrusion 302 and the article in the direction of arrow K in FIG. The first taper surface 51a slides on the first taper surface 21a and the elastic deformation piece 4 bends. Subsequently, the second taper surface 51b slides on the second taper surface 21b, and FIG. 6 (b). As shown in FIG. 6, the elastic deformation piece 4 is restored to the no-load state by overcoming the lock protrusion 302, and the lock is performed with the opposing surfaces 20, 50 facing each other as shown in FIG. 6 (c). The protrusion 302 and the lock arm 303 are engaged.

  When the lock arm 303 side does not move and the lock projection 302 side moves, the lock projection 302 and the article move in the direction opposite to the arrow K with respect to the lock arm 303 and the other article.

JP 2011-151969 A

  The conventional lock structure 301 described above has the following problems.

  The first problem is that a half-lock can occur during the engagement operation between the lock protrusion 302 and the lock arm 303. The half-lock means that the protrusion 5 stops on the lock protrusion 302, that is, the second taper surfaces 21b and 51b overlap each other. In FIG. 6, the state where the reference point Q of the lock arm 303 is stopped within the range of D1 is a half-locked state.

  The second problem is to confirm whether the lock protrusion 302 and the lock arm 303 are completely engaged (hereinafter referred to as “complete lock” with respect to the half lock) or the half lock. It is a problem that is difficult. When confirming whether the lock is completely or semi-locked, it is confirmed visually or by using its own device or device called a checker, but in most cases, the lock protrusion 302 and the lock arm 303 are used for an article or other It was placed inside the article and it was difficult to confirm visually.

  When checking using a checker, it is determined whether the lock arm 303 is fully locked or semi-locked based on the relative position of the lock arm 303 with respect to the lock protrusion 302. In FIG. 6, the state where the reference point Q of the lock arm 303 is within the range of D2 is the complete lock state. As shown in FIG. 6, in the lock structure 301, there is no great difference in the position of the lock arm 303 between the complete lock state and the semi-lock state, that is, the range that can be determined as complete lock is narrow. It was difficult.

  Even if the position of the lock arm 303 or the other article is visually confirmed, there is no significant difference in the position of the lock arm 303 or the other article between the fully locked state and the half-locked state. Like, it was difficult to judge.

  The inventor of the present application has studied a lock structure that can solve such a problem, but there are various restrictions in changing the shape of the lock protrusion 302 or the lock arm 303, and it is easy to develop a lock structure that can solve the above problem. It wasn't. The various restrictions include, for example, a restriction that a locking allowance (indicated by F in FIG. 6) between the lock protrusion 302 and the protrusion 5 must be sufficiently secured, and the lock protrusion 302 and the lock arm 303. This is a restriction that the lock space for placement cannot be increased, and that the lock protrusion 302 and the lock arm 303 must have sufficient strength.

  Therefore, an object of the present invention is to provide a lock structure that can prevent half-lock and can easily check whether the lock is completely locked or half-locked.

  In order to achieve the above object, the invention described in claim 1 includes a lock protrusion protruding from an article, an elastic deformation piece connected in a cantilever manner to another article, and a protrusion protruding from the surface of the elastic deformation piece. A lock arm that engages with the lock protrusion, and the lock protrusion and the protrusion of the lock arm face each other in an engaged state, Each of the taper surface of the lock projection and the taper surface of the projection portion is provided with a convex portion having an end surface flush with the opposing surface, and the other side A concave groove is provided that extends to a surface and moves the projection when the lock projection and the lock arm engage with each other, and when the lock projection and the lock arm engage with each other, the projection Is the bottom of the groove A first bottom surface that slides and a portion other than the convex portion on one tapered surface does not contact a portion other than the concave groove on the other tapered surface, and a bottom surface of the concave groove is separated from the facing surface And a second bottom surface located between the opposing surface and the first bottom surface, and a boundary portion between the first bottom surface and the second bottom surface, wherein the second bottom surface is relative to the opposing surface. When the projecting portion stops at the first bottom surface without overcoming the boundary portion when the lock projection and the lock arm are engaged, the restoring force of the deformed elastic deformation piece acts. When the convex portion moves away from the second bottom surface, and the convex portion gets over the boundary portion, the restoring force of the deformed elastic deformation piece acts and the convex portion slides on the second bottom surface, The lock, wherein the lock protrusion and the lock arm are engaged. It is an elephant.

  According to a second aspect of the present invention, in the first aspect of the invention, the tapered surface provided with the concave groove includes a first tapered surface separated from the opposing surface, the opposing surface, and the first A second taper surface located between the first taper surface and an angle formed between the second taper surface and the facing surface is smaller than an angle formed between the second bottom surface and the facing surface. It is characterized by.

  The invention described in claim 3 is the invention described in claim 1 or 2, wherein the convex portion is provided on the tapered surface of the locking projection, and the concave groove is the tapered surface of the protruding portion. The elastic deformation piece is provided with a second concave groove in which the convex portion is positioned in a state where the lock protrusion and the lock arm are engaged with each other.

  According to the first aspect of the present invention, the half-lock can be prevented by the shape of the bottom surface of the concave groove, and the locking allowance between the lock projection and the protruding portion by the both side portions of the concave groove and the both side portions of the convex portion. Can be secured sufficiently. In addition, when confirming whether the lock arm is fully locked or semi-locked based on the relative position of the lock arm with respect to the lock protrusion, the range where the convex portion is in contact with the second bottom surface can be included in the range to be determined as complete lock. The range that can be determined to be locked is widened, and it is possible to easily confirm whether the lock is completely locked or semi-locked.

  According to the second aspect of the present invention, it is possible to add the convex portion and the concave groove to the conventional lock structure, and to add the convex portion and the concave groove in the same lock space as the conventional lock structure. Can do.

  According to the invention described in claim 3, since the second concave groove is provided in the elastic deformation piece, it is possible to avoid the enlargement of the lock space due to the provision of the convex portion, and the lock protrusion and the protrusion. It is possible to avoid a reduction in the allowance with the part.

It is a perspective view of a lock projection and a lock arm which constitute a lock structure concerning one embodiment of the present invention. It is sectional drawing along the AA line in FIG. It is sectional drawing along the BB line in FIG. It is explanatory drawing explaining a mode at the time of the lock | rock protrusion shown in FIG. 1 and a lock arm engaging. It is a perspective view of the lock protrusion and lock arm which constitute the conventional lock structure. It is explanatory drawing explaining a mode at the time of the lock | rock protrusion shown by FIG. 5 and a lock arm engaging.

  A “lock structure” according to an embodiment of the present invention will be described with reference to FIGS.

  The lock structure 1 shown in FIG. 1 is obtained by adding a convex portion 6 and a concave groove 7 to the lock structure 301 shown in FIGS. In the lock structure 1, the same components as those of the lock structure 301 are described with the same reference numerals.

  The lock structure 1 includes a synthetic resin lock protrusion 2 protruding from an article 8 (shown in FIG. 2), and a synthetic resin lock arm 3 engaged with the lock protrusion 2. The lock arm 3 includes an elastically deformable piece 4 that is connected to another article 9 (shown in FIG. 3) in a cantilever manner, and a protrusion 5 that protrudes from the surface of the elastically deformable piece 4. The lock arm 3 engages with the lock projection 2 as shown in FIG. 4C by moving with the other projections 9 in the direction of arrow K in FIG. . Further, when the lock arm 3 side does not move and the lock projection 2 side moves, the lock projection 2 and the article 8 move in the direction opposite to the arrow K with respect to the lock arm 3 and other articles 9.

  The elastically deformable piece 4 of the lock arm 3 protrudes in a direction orthogonal to the arrow K from the surface of another article 9 in an unloaded state, that is, in a natural state, bends substantially at a right angle and extends in a direction opposite to the arrow K direction. ing. The end of the elastic deformable piece 4 that is connected to the other article 9 is referred to as a “fixed end 4a”, and the opposite end is referred to as a “free end 4b”.

  The lock protrusion 2 and the protrusion 5 of the lock arm 3 have opposing surfaces 20 and 50 and tapered surfaces 21 and 51 that face each other in the engaged state.

  As shown in FIG. 2, the taper surface 21 of the lock protrusion 2 includes a first taper surface 21 a far from the facing surface 20 and a second taper surface 21 b located between the facing surface 20 and the first taper surface 21 a. And have. The second taper surface 21b forms an angle with respect to both the facing surface 20 and the first taper surface 21a. Further, the second tapered surface 21b and the facing surface 20 are substantially perpendicular. The tapered surface 21 is provided with a convex portion 6 having an end surface 60 that is flush with the opposing surface 20. Moreover, the convex part 6 is provided in the 2nd taper surface 21b in this embodiment, and the cross-sectional shape is formed in the mountain shape.

  As shown in FIG. 3, the taper surface 51 of the protrusion 5 includes a first taper surface 51a that is separated from the facing surface 50, and a second taper surface 51b that is located between the facing surface 50 and the first taper surface 51a. And have. The 1st taper surface 51a is located in the fixed end 4a side of the elastic deformation piece 4 rather than the 2nd taper surface 51b. The second taper surface 51b forms an angle with respect to both the facing surface 50 and the first taper surface 51a. The second taper surface 51b and the facing surface 50 are substantially perpendicular. The tapered surface 51 is provided with a concave groove 7 in which one end extends to the facing surface 50 and in which the convex portion 6 moves when the lock projection 2 and the lock arm 3 are engaged. Moreover, the other end of the concave groove 7 is extended to the vicinity of the fixed end 4a of the elastic deformation piece 4 in this embodiment.

  When the lock projection 2 and the lock arm 3 are engaged, the convex portion 6 slides on the bottom surface 7 a of the concave groove 7, and the portion other than the convex portion 6 on the tapered surface 21 of the lock projection 2 is the projection portion 5. No contact is made with the taper surface 51 other than the groove 7. The elastic deformation piece 4 is provided with a second concave groove 17 in which the convex portion 6 is positioned in a state where the lock protrusion 2 and the lock arm 3 are engaged. One end of the second concave groove 17 extends to the facing surface 50, and the other end extends to the free end 4 b of the elastic deformation piece 4.

  As shown in FIG. 3, the bottom surface 7 a of the concave groove 7 includes a fixed-end-side bottom surface 70 located on the fixed-end 4 a side of the elastic deformation piece 4, a first bottom surface 71 separated from the facing surface 50, and a facing surface 50. And a second bottom surface 72 located between the first bottom surface 71 and a boundary portion 73 between the first bottom surface 71 and the second bottom surface 72. The boundary portion 73 is a portion where R is attached to the corner portion where the first bottom surface 71 and the second bottom surface 72 intersect. The first bottom surface 71 is inclined in a direction away from the surface of the elastic deformation piece 4 as it approaches the boundary portion 73. The second bottom surface 72 is inclined in a direction approaching the surface of the elastic deformation piece 4 as the distance from the boundary portion 73 increases. In addition, the second bottom surface 72 forms an obtuse angle with respect to the facing surface 50. That is, the angle formed by the second bottom surface 72 and the facing surface 50 is not a right angle. Thus, the angle formed by the second bottom surface 72 and the facing surface 50 is larger than the angle (substantially perpendicular) formed by the second tapered surface 51b and the facing surface 50.

  When the lock protrusion 2 and the lock arm 3 are engaged with each other, the lock arm 3 and the other article 9 move relative to the lock protrusion 2 and the article 8 in the direction of the arrow K in FIG. By doing so, the convex portion 6 slides on the fixed end side bottom surface 70 of the concave groove 7, and then the convex portion 6 slides on the first bottom surface 71 and the elastic deformation piece 4 bends toward the other article 9 side. Subsequently, as shown in FIG. 4B, the convex portion 6 gets over the boundary portion 73, and the convex portion 6 slides on the second bottom surface 72 and gets over the protruding portion 5, so that the elastic deformation piece 4 is not present. The load is restored and the lock protrusion 2 and the lock arm 3 are engaged with each other with the opposing surfaces 20 and 50 facing each other as shown in FIG. Further, in a state where the lock protrusion 2 and the lock arm 3 are engaged, the apex portion of the convex portion 6 is located in the second concave groove 17.

  In addition, when the convex portion 6 stops at the first bottom surface 71 without getting over the boundary portion 73 due to some reason such as insufficient pushing of the other article 9, the restoring force of the deformed elastic deformation piece 4 acts. Thus, the convex portion 6 moves away from the second bottom surface 72, and the occurrence of half-lock is prevented. Further, even if the convex portion 6 temporarily stops at the second bottom surface 72 due to some reason such as insufficient pressing of the other article 9, the restoring force of the deformed elastic deformation piece 4 and the inclination of the second bottom surface 72. The angle acts, and the convex portion 6 slides on the second bottom surface 72 again, and the lock protrusion 2 and the lock arm 3 are engaged with each other, so that the half lock is prevented from occurring.

  Further, in a state where the convex portion 6 is in contact with the boundary portion 73, that is, the reference point P of the lock arm 3 in FIG. 4 (the convex portion 6 in the boundary portion 73 when the lock protrusion 2 and the lock arm 3 are engaged) Is theoretically within the range of C1, a half-lock is theoretically generated, but since the length of the boundary 73 is very small, in practice it is almost half. There is no lock.

  According to the lock structure 1 of the present invention, the half-lock can be prevented by the bottom surface shape of the groove 7, and the lock protrusion 2 and the protrusion 5 are formed by both sides of the groove 7 and both sides of the protrusion 6. It is possible to secure a sufficient allowance. As shown in FIG. 4C, the locking allowance in the present lock structure 1 includes the engagement allowance E1 on both side portions of the concave groove 7 and both side portions of the convex portion 6 and the length E2 of the end surface 60 of the convex portion 6. E3 which is the sum of An engagement allowance E1 of both side portions of the concave groove 7 and both side portions of the convex portion 6 is equal to an engagement allowance F of the lock protrusion 302 and the protrusion portion 5 in the conventional lock structure 301. Thus, according to the lock structure 1, the convex portion 6 and the concave groove 7 can be added to the conventional lock structure 301, and the convex portion 6 and the concave groove are provided in the same lock space as the conventional lock structure 301. 7 can be added.

  Furthermore, according to the lock structure 1 of the present invention, when confirming whether the lock arm 3 is completely locked or half-locked based on the relative position of the lock arm 3 with respect to the lock protrusion 2, the range in which the convex portion 6 contacts the second bottom surface 72. Since it can be included in the range to be determined as a complete lock, the range that can be determined as a complete lock is wider than the conventional lock structure 301, and it can be easily confirmed by visual check or a simple checker whether it is a complete lock or a semi-lock. . Therefore, the work man-hour and the work cost can be suppressed. In the present lock structure 1, if the reference point P of the lock arm 3 is located within the range C2 shown in FIG. 4, it can be determined that the lock is completely locked.

  The lock structure 1 described above is applied to, for example, a frame and a cassette block of an electric junction box for automobiles.

  In the above-described embodiment, the convex portion 6 is provided on the lock projection 2 side and the concave groove 7 is provided on the lock arm 3 side. However, the concave groove 7 is provided on the lock projection 2 side, and the lock arm 3 is provided. The convex part 6 may be provided in the side. In that case, the second concave groove 17 may be provided in the article 8.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Locking structure 2 Locking protrusion 3 Locking arm 4 Elastic deformation piece 5 Protruding part 6 Convex part 7 Concave groove 8 Goods 9 Other goods 20, 50 Opposing surfaces 21, 51

Claims (3)

A locking protrusion protruding from the article;
A lock arm that has an elastic deformation piece that is connected to another article in a cantilevered manner, and a protrusion that protrudes from the surface of the elastic deformation piece, and engages the lock protrusion;
A lock structure comprising:
The lock protrusion and the protrusion of the lock arm each have a facing surface that faces each other in the engaged state, and a tapered surface,
One of the tapered surface of the lock projection and the tapered surface of the projection is provided with a convex portion having an end surface flush with the opposing surface, and on the other side, extends to the opposing surface, and the locking projection and the When the lock arm is engaged, a concave groove is provided in which the convex part moves.
When the lock protrusion and the lock arm are engaged, the convex portion slides on the bottom surface of the concave groove, and a portion other than the convex portion on one tapered surface is the concave groove on the other tapered surface. Without touching any other part,
The bottom surface of the concave groove is a first bottom surface separated from the facing surface, a second bottom surface positioned between the facing surface and the first bottom surface, and a boundary portion between the first bottom surface and the second bottom surface. Have
The second bottom surface forms an obtuse angle with respect to the facing surface;
When the lock protrusion and the lock arm are engaged, if the convex portion stops at the first bottom surface without overcoming the boundary portion, the restoring force of the deformed elastic deformation piece acts to cause the convex portion to When moving away from the second bottom surface and the convex portion gets over the boundary, the restoring force of the deformed elastic deformation piece acts to cause the convex portion to slide on the second bottom surface, and the locking projection and the lock A lock structure characterized by engagement with an arm. The tapered surface provided with the concave groove has a first tapered surface separated from the opposing surface, and a second tapered surface located between the opposing surface and the first tapered surface;
The lock structure according to claim 1, wherein an angle formed between the second tapered surface and the facing surface is smaller than an angle formed between the second bottom surface and the facing surface. The convex portion is provided on the tapered surface of the lock protrusion;
The concave groove is provided on the tapered surface of the protrusion,
3. The second groove according to claim 1, wherein the elastic deformable piece is provided with a second concave groove in which the convex portion is positioned in a state where the lock protrusion and the lock arm are engaged. Lock structure.

Images