JP4926084B2 - Lock mechanism - Google Patents

Description

  The present invention relates to, for example, a lock mechanism that is provided between a rear surface of a vehicle-mounted electrical junction box and a vehicle body panel and fixes the electrical junction box to the vehicle body panel.

  FIG. 9 shows a conventional example of this type of locking mechanism described in Patent Document 1. In FIG. This locking mechanism is provided between the electric junction box 100 and the vehicle body panel. The locking claw 120 and the through bracket 122 provided on the side wall on the back side of the electric junction box 100 and the vehicle body panel face upward. It consists of a plate-like bracket 150 protruding.

  The plate bracket 150 is provided with an engagement hole 152 that engages with the locking claw 120. The through bracket 122 is formed with a fitting groove for fitting the plate-like bracket 150. The locking claw 120 has a base end fixed to the side wall of the electrical connection box 100 and a free end flexible. In the form which has property, it is arrange | positioned between the fitting grooves of the through bracket 122. FIG.

  When the electrical junction box 100 is fixed to the vehicle body panel using this locking mechanism, the opening end of the fitting groove of the through bracket 122 is inserted into the plate bracket 150, and both side edges of the plate bracket 150 are fitted to the fitting grooves. The through bracket 122 is slid downward in FIG. When the electric connection box 100 is slid until the end of the plate-like bracket 150 comes into contact with the groove end of the fitting groove, the locking claw 120 engages with the engagement hole 152 of the plate-like bracket 150, thereby making the electric connection The box 1 is fixed to the plate-like bracket 150 on the vehicle body panel side so as not to come out upward.

On the other hand, when it is necessary to release this lock, the tip of a jig such as a screwdriver is inserted into the back surface of the electrical connection box 100, and the locking claw 120 is deformed in the release direction at the tip of the jig. The electrical connection box 100 is slid up. Then, the electrical junction box 100 can be detached from the bracket 150.
JP 2000-184555 A

  By the way, in recent years, it has been desired that the electrical junction box can be easily detached from the vehicle body when the vehicle is disassembled due to a request for recycling of the vehicle and the like. However, since the locking claw 120 is hidden behind the electrical junction box 100 once locked, the conventional locking mechanism is very difficult to unlock, and the electrical junction box or the like can be easily removed from the vehicle body. There was no problem.

  In consideration of the above circumstances, an object of the present invention is to provide a lock mechanism that can be easily unlocked when necessary, such as when a vehicle is dismantled.

  The locking mechanism according to the first aspect of the present invention is provided between a first member to be fixed and a second member to be fixed to the first member, and the first member is fixed to the second member. In a sliding type lock mechanism that achieves a locked state by sliding relatively in the vertical direction and fixes the first member to the second member, a band plate projecting vertically in the second member Provided on the wall surface of the first member, a slide frame that forms a slide space for sliding the bracket in the vertical direction relatively along the wall surface, and provided on the wall surface of the first member And having flexibility in the thickness direction of the bracket, and when the bracket slides relative to the longitudinal direction along the slide frame, the bracket engages with an engagement recess of the bracket, and First A locking piece having an engaging projection for locking the vertical movement of the member, and a wall surface of the bracket on the wall surface of the first member, wherein the bracket includes the engaging recess and the engaging projection. When it is moved in the lateral direction from the locked position engaged at the position where it is directly opposed, the engagement convex portion is received and the vertical movement of the engagement convex portion is allowed in that state, The bracket and the first member are biased toward a longitudinal groove that enables the engagement convex portion to be extracted from the tip of the bracket, and a position where the engagement concave portion and the engagement convex portion face each other. Biasing means.

  The invention of claim 2 is the lock mechanism according to claim 1, wherein the biasing member includes an arm-shaped spring piece whose tip is pressed against the side edge of the bracket on the inner wall of the slide frame. It is provided.

  A third aspect of the present invention is the locking mechanism according to the second aspect, wherein the longitudinal groove is formed on both sides in the lateral direction of the engagement recess that engages with the engagement projection. Each of the spring pieces is provided on an inner wall of the slide frame.

  The invention according to claim 4 is the lock mechanism according to claim 2 or 3, wherein the spring piece is at a position on the near side in the insertion direction of the bracket with respect to the slide frame, and a base end is an inner wall of the slide frame. The tip end side extends obliquely to the back side in the insertion direction of the bracket.

  According to the invention of claim 1, as in the conventional example, the bracket is inserted so that the tip of the bracket enters from the entrance of the slide frame, and the slide frame is slid relative to the bracket in the vertical direction, so that the lock piece is attached to the bracket. While being bent in the thickness direction, the engaging convex portion of the lock piece returned from the bending can be engaged with the engaging concave portion of the bracket, thereby fixing the first member to the bracket of the second member. it can.

  At this time, the engagement concave portion on the bracket side and the engagement convex portion of the lock piece are held at the positions facing each other by the action of the urging member, so that they are strongly engaged with each other in a state of facing each other and shifted laterally. There is nothing to do. Therefore, a normal high holding force can be ensured.

  Further, since the slide frame is held at the correct position with respect to the bracket by the biasing force of the biasing means, it is possible to eliminate rattling between the bracket, the slide frame, and the lock piece. In addition, since the width of the slide space can be provided with respect to the width of the bracket, variations in the dimensions of the bracket and the slide frame can be absorbed, and the bracket and the slide frame can be smoothly fitted. .

  On the other hand, when releasing the lock from this state, the slide frame is moved laterally with respect to the bracket. If it does so, the engagement convex part of a lock piece will enter in the vertical groove of a bracket. Therefore, the lock can be released by removing the engaging convex portion from the bracket while moving along the longitudinal groove. Thus, the lock member can be released by moving the first member in the horizontal direction and the vertical direction in order without releasing the lock piece using a jig or the like. Can be easily removed from the second member, and the dismantling property is excellent.

  According to the second aspect of the present invention, since the arm-shaped spring piece is provided on the inner wall of the slide frame as the urging member, the effect of the first aspect can be obtained by adding a simple configuration.

  According to the invention of claim 3, since the longitudinal groove and the spring piece are provided on both sides of the engaging recess, the lock can be released regardless of which side the first member is moved laterally, and the directionality is not selected. .

  According to invention of Claim 4, since the front end side of the spring piece extended diagonally toward the back, when inserting a bracket in a slide frame, it is easy to insert.

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

  1 is a perspective view showing a state before the lock mechanism of the embodiment is locked, FIG. 2 is a front sectional view showing the internal structure of the slide frame of the lock mechanism, and FIG. 3 is a horizontal sectional view of the slide frame. 4 is a perspective view of the bracket of the lock mechanism as viewed from the opposite side of FIG. 1, FIG. 5 is a perspective view of the lock mechanism in a locked state, and FIG. 6 is a cross-sectional view of the lock mechanism as viewed from the front. 7 is a cross-sectional view seen from the front showing a state in the middle of operation when unlocking, and FIG. 8 is a horizontal cross-sectional view in the state of FIG.

  As shown in FIG. 1, the locking mechanism of the present embodiment includes a first member 1 (for example, an electrical connection box) to be fixed and a second member (for example, a vehicle body panel (not shown)) to which the first member 1 is fixed. ) And the first member 1 is slid in the longitudinal direction (downward in the drawing) relative to the second member, whereby the locked state can be achieved. 1 is a slide-type locking mechanism that fixes 1 to a second member, a band-plate-like bracket 50 protruding upward (vertically) on the second member, and a slide frame provided on the wall surface of the first member 1 10 and a lock piece 20. The bracket 50 is made of metal or resin, and has an engagement hole (engagement recess) 52 penetrating in the center portion in the width direction of the substrate 51. Further, the slide frame 10 and the lock piece 20 are made of resin and are manufactured integrally with the side wall of the first member 1.

  The slide frame 10 includes a front wall 11, a back wall 12, and a side wall 15 that are arranged in parallel with the wall surface of the first member 1. A slide space 13 is formed for sliding in the vertical direction (vertical direction) relatively along the wall surface of the one member 1. In addition, a rectangular notch 14 is provided in the center upper half of the front wall 11 and the back wall 12 in the width direction, and a lock piece 20 is disposed in the notch 14. Reinforcing ribs 16 that connect the back wall 12 and the front wall 11 are provided at the upper end portions on both sides of the notch 14.

  The lock piece 20 is provided on the wall surface of the first member 1 so as to have flexibility in the thickness direction of the bracket 50, and has an engaging convex portion 20 a on the front surface. When the bracket 50 has been slid relatively upward along the slide frame 10, the engagement convex portion 20 a is engaged with the engagement hole 52 of the bracket 50, and the first member 1 with respect to the bracket 50 is engaged. This is the part that locks the movement in the vertical direction.

  As shown in FIG. 4, two parallel longitudinal grooves 53 are provided on the plate surface of the bracket 50 facing the wall surface of the first member 1 of the substrate 51, leaving a column portion 54 at the center. Yes. These two vertical grooves 53 are formed when the bracket 50 is moved in the lateral direction (left-right direction) from the locked position where the engagement hole 52 and the engagement convex portion 20a are opposed to each other. A portion that receives the engaging convex portion 20a and allows the engaging convex portion 20a to move in the vertical direction in that state, and allows the engaging convex portion 20a to be extracted from the tip of the bracket 50. is there.

  The vertical grooves 53 are formed on both sides of the engagement hole 52 in the horizontal direction, and the width B1 of the vertical groove 53 shown in FIG. 4 is larger than the width B1 of the lock piece 20 (engagement convex portion 20a) shown in FIG. However, since it is necessary to receive the engaging convex portion 20a, it is set slightly larger (that is, B2> B1). Further, the width of the engagement hole 52 is set to have a margin with respect to the width of the lock piece 20 (engagement convex portion 20a). This is to ensure that the engagement convex portion 20a is fitted into the engagement hole 52 even if there is a slight positional shift due to a dimensional error or the like.

  In addition, on each inner surface (corresponding to the inner wall) of the left and right side walls 15 of the slide frame 10, as shown in FIGS. 2 and 6, an arm-shaped spring piece (a tip 18 c is pressed against the side edge of the bracket 50) ( (Biasing means) 18 is provided. These spring pieces 18 urge the bracket 50 and the first member 1 toward a position where the engagement hole 52 of the bracket 50 and the engagement convex portion 20a of the lock piece 20 face each other, and slide. The proximal end 18a is fixed to the inner surface of the side wall 15 of the slide frame 10 at a position on the near side (lower side) of the bracket 50 in the insertion direction of the bracket 50 with respect to the frame 10, and the portion on the distal end 18c side from the intermediate portion 18b in the length direction is The bracket 50 extends obliquely toward the back side (upper side) in the insertion direction.

  Next, the operation will be described.

  First, when locking the locking mechanism having the above configuration, the bracket 50 is inserted so that the tip (upper end) of the bracket 50 enters from the lower end inlet of the slide frame 10, and the slide frame 10 is slid downward with respect to the bracket 50. Then, the locking piece 20 bends in the thickness direction of the bracket 50 by interfering with the bracket 50, and is further slid, so that the engaging convex portion 20 a of the locking piece 20 is engaged with the engaging hole 52 of the bracket 50 while returning from the bending. The first member 1 is fixed to the bracket 50 as shown in FIG.

  At this time, the engagement hole 52 on the bracket 50 side and the engagement convex portion 20a of the lock piece 20 are held at positions facing each other by the urging force of both spring pieces 18, so that they are strongly engaged with each other in a state of facing each other. However, it does not shift sideways. Therefore, a normal high holding force can be ensured.

  Further, since the slide frame 10 can be held at the correct position with respect to the bracket 50 by the urging force of the spring pieces 18 on both sides, the play between the bracket 50, the slide frame 10 and the lock piece 20 can be eliminated. That is, the spring piece 18 plays the role of a rattling prevention arm.

  In addition, since the bracket 50 and the lock piece 20 can be held at appropriate positions by the action of the spring piece 18, a margin can be given to the width of the slide space 13 with respect to the width of the bracket 50. Variations in the dimensions of the frame 10 can be absorbed, and the bracket 50 and the slide frame 10 can be smoothly fitted.

  On the other hand, when releasing the lock from the locked state shown in FIG. 6, the slide frame 10 is moved in the lateral direction (the arrow Y direction in the figure) while the spring piece 18 is deformed with respect to the bracket 50. The direction of movement may be either. If it does so, the engagement convex part 20a of the lock piece 20 will remove | deviate from the position of the engagement hole 52, and will enter in the vertical groove 53 of the bracket 50 shown in FIG. Therefore, the lock can be released by removing the engaging projection 20a from the bracket 50 while moving along the vertical groove 53.

  In this way, the lock piece 20 can be released by moving the first member 1 in the horizontal direction and the vertical direction in order without releasing the lock piece 20 using a jig or the like. The one member 1 can be easily detached from the bracket, and the disassembly can be improved.

  Moreover, in this embodiment, since the arm-shaped spring piece 18 is provided on the inner surface of the side wall 15 of the slide frame 10 as the urging member, the above effects can be obtained by adding a simple configuration. Further, since the distal end 18c side of the spring pieces 18 extends obliquely toward the back, it becomes easy to insert the bracket 50 into the slide frame 10.

  Further, as described above, the normal locking method is that the lock piece 20 is fitted to the bracket 50 while the bracket 50 and the slide frame 10 are held in a position facing each other by the urging force of the spring piece 18 as described above. However, it is possible to achieve the locking by another method.

  That is, while deforming the spring piece 18, the bracket 50 and the slide frame 10 are positioned from the beginning so that the engagement convex portion 20 a of the lock piece 20 enters the vertical groove 53 of the bracket 50, and in this state, the slide frame 10. Is fitted into the bracket 50 and slid. And if it slides to the place where the height of the engagement hole 52 and the engagement convex part 20a corresponds, the deformation | transformation of the spring piece 18 will be cancelled | released. Then, the bracket 50 moves laterally relative to the slide frame 10 by the urging force of the spring piece 18, and the engagement protrusion 20 a and the engagement hole 52 face each other and engage with each other. Thereby, the bracket 50 and the first member 1 can be locked so as not to move in the vertical direction. In this case, the lock piece 20 and the bracket 50 can be engaged without applying a bending load to the lock piece 20.

  Therefore, if the locking is limited only by this method, the locking piece 20 may not be given flexibility in the thickness direction of the bracket 50. However, since the normal method of locking the electrical junction box is performed by the operation of placing the back portion of the electrical junction box on the bracket 50 from above, it can be said that the flexibility of the lock piece 20 is a necessary requirement.

  In the above embodiment, the engagement hole 52 penetrating the substrate 51 of the bracket 50 is formed, but an engagement recess that does not penetrate may be formed on the inner surface of the substrate 51 on the first member 1 side.

  Moreover, in the said embodiment, although the vertical groove 53 is provided in the both sides of the engagement hole 52, you may provide in only one side.

  Moreover, in the said embodiment, although the spring piece 18 as an urging means which urges | biases the bracket 50 and the slide frame 10 to an appropriate position is provided in the slide frame 10 side, the urging means equivalent to a spring piece is provided. It can also be provided on the side edge of the bracket 50.

It is a perspective view which shows the state before locking of the locking mechanism of embodiment of this invention. It is sectional drawing seen from the front which shows the internal structure of the slide frame of the lock mechanism. It is a horizontal sectional view of the slide frame. It is the perspective view seen from the opposite side of Drawing 1 of the bracket of the lock mechanism. It is a perspective view which shows the locked state of the lock mechanism. It is sectional drawing seen from the front at the time of the lock state. It is sectional drawing seen from the front which shows the state in the middle of operation when releasing a lock | rock. It is a horizontal sectional view in the state of FIG. It is a perspective view which shows the example of the conventional lock mechanism.

Explanation of symbols

1 First member 10 Slide frame 13 Slide space 15 Side wall 18 Spring piece (biasing means)
18a Base end 18c Tip 20 Lock piece 20a Engagement convex part 50 Bracket 52 Engagement hole (engagement concave part)
53 Vertical groove

Claims (4)

By being provided between the first member to be fixed and the second member to be fixed to the first member, the first member is slid relative to the second member in the vertical direction. In the slide type locking mechanism that achieves the locked state and fixes the first member to the second member,
A strip-like bracket projecting vertically on the second member;
A slide frame which is provided on the wall surface of the first member and forms a slide space for sliding the bracket in the longitudinal direction relatively along the wall surface;
Provided on the wall surface of the first member and having flexibility in the thickness direction of the bracket, and when the bracket slides relatively in the vertical direction along the slide frame, A locking piece having an engaging projection for engaging and locking the vertical movement of the first member relative to the bracket;
When the bracket is moved in a lateral direction from a lock position that is provided on a wall surface of the first member of the bracket and is engaged at a position where the engagement concave portion and the engagement convex portion face each other. In addition, the vertical groove that receives the engaging convex portion and allows the engaging convex portion to move in the vertical direction in that state, and allows the engaging convex portion to be extracted from the tip of the bracket. When,
An urging means for urging the bracket and the first member toward a position where the engagement concave portion and the engagement convex portion face each other;
A locking mechanism comprising: The locking mechanism according to claim 1,
An arm-shaped spring piece whose tip is pressed against a side edge of the bracket is provided on the inner wall of the slide frame as the biasing member. The locking mechanism according to claim 2,
The longitudinal grooves are formed on both sides of the engaging recess that engages with the engaging protrusion, and the arm-like spring pieces are respectively provided on the inner wall of the slide frame. A lock mechanism. The lock mechanism according to claim 2 or 3,
The spring piece is fixed to the inner wall of the slide frame at a position on the near side in the insertion direction of the bracket with respect to the slide frame, and the distal end extends obliquely to the back side in the insertion direction of the bracket. A lock mechanism characterized by being.

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