JP3055625U - Latch - Google Patents

Abstract

(57) [Summary] [Problem] Even when a strong pulling force is applied in a direction to pull out an insertion piece from between a substrate and a rotation piece, the insertion piece does not come out from between the substrate and the rotation piece. A fastener is provided. SOLUTION: A locking tool 10 includes an insertion piece 22. The back surface of the insertion piece 22 is supported by the substrate 32. Both sides of the insert 22 are guided by side walls 34. The surface of the insertion piece 22 is supported by the rotating piece 36. One end of the rotating piece 36 is pivotally supported, and the other end is rotated in a direction substantially orthogonal to the main surface. The first engagement protrusion 42 is rotated so that when the rotation piece 36 is rotated and overlapped on the surface of the insertion piece 22, the insertion piece 22 penetrates in the thickness direction and is attached to the surface of the substrate 32. The moving piece 36 is formed. First
Is formed through the insertion piece 22 in the thickness direction so that the engaging projection 42 protrudes from the rotating piece 36 toward the substrate 32. The first engagement concave portion 44 is formed by at least denting the surface of the substrate 32, and the first engagement protrusion 42 protruding from the through hole 24 is engaged.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a locking device, and more particularly to, for example, a locking device for fastening a lid of a case, in which a lid and a main body are connected by a hinge, to the main body.

[0002]

[Prior art]

 Conventionally, a locking tool for fastening a lid of a case, in which a lid and a main body are connected by a hinge, to the main body, includes an insertion piece fixed to the lid and a substrate fixed to the main body. There is. A rotating piece is pivotally supported by the substrate so as to be rotatable along the insertion / removal direction of the insertion piece. When fastening the lid of the case to the main body, the insertion piece is inserted between the substrate and the rotating piece. Then, the rotating piece is rotated in a direction substantially orthogonal to the main surface thereof, and the engaging projection formed on the rotating piece is engaged with the engaging concave portion formed on the insertion piece, thereby forming a cover. Is fastened to the body. When opening the lid of the case, the turning piece is turned in the opposite direction to detach the engaging projection from the engaging recess, and the insertion piece is pulled out from between the substrate and the turning piece.

[0003]

[Problems to be solved by the invention]

 However, in such a conventional locking device, when a force for pulling the insertion piece out of the space between the substrate and the rotation piece is strongly applied, the engagement recess of the insertion piece engages the rotation piece. A force acts in a direction to push up the protrusion. However, since the conventional locking device does not have a means for resisting the force, the engaging projection may be detached from the engaging concave portion and the insertion piece may come out from between the substrate and the rotating piece. was there.

[0004] Therefore, a main object of the present invention is that even when a strong pulling force is applied in a direction in which the insertion piece is pulled out from between the board and the rotating piece, the insertion piece is not moved between the board and the rotating piece. An object of the present invention is to provide a locking device from which the insertion piece does not come off.

[0005]

[Means for Solving the Problems]

 The locking device according to the present invention includes a plug, a substrate supporting the back surface of the plug, a side wall erected on the surface of the substrate for guiding both sides in the width direction of the plug, and a plug. In order to support the surface of the piece, a rotating piece whose one end is pivotally supported on the substrate and whose other end is rotated in a direction substantially perpendicular to the main surface of the insertion piece in and out of the insertion piece; Insert the insertion piece between the turning piece and the substrate surface from one end side of the board, rotate the turning piece, and make the insertion piece thicker when the other end overlaps the surface of the insertion piece. A first engaging projection formed on the rotating piece so as to penetrate the insertion piece in the thickness direction and a first engaging projection formed through the insertion piece in the thickness direction. A through-hole for projecting from the moving piece side to the substrate side, and a first engaging recess for engaging a first engaging projection formed at least in the substrate surface and projecting from the through-hole are formed. Including A locking device. In order to connect the insertion piece of the locking device with the board and the turning piece, the insertion piece is inserted between the board and the turning piece, and the turning piece is inserted along the insertion direction of the insertion piece. By pivoting in the direction perpendicular to the main surface of the lever and overlapping the other end thereof with the surface of the insertion piece, the first engaging projection projects from the through hole to form the first engaging recess. To be engaged. In this locking device, the first engaging projection is engaged with the first engaging concave portion formed on the substrate, so that the insertion piece is strongly pulled in a direction in which the insertion piece is pulled out from between the substrate and the rotating piece. Even if a force is applied and the through hole of the insertion piece presses the engagement projection of the rotating piece, the first engagement projection does not come off from the first engagement recess without permission. Does not fall out from between the substrate and the rotating piece. Therefore, with this locking tool, the insertion piece can be reliably connected to the substrate and the rotating piece. On the other hand, in order to release the connection between the insertion piece of the anchor and the board and the rotating piece, the rotating piece is rotated in a direction substantially perpendicular to the main surface thereof, and the first engaging projection is moved. By displacing in the thickness direction, it can be detached from the first engaging concave portion and the through hole, and the insertion piece can be easily extracted from between the substrate and the rotating piece.

In the locking device according to the present invention, when the first engaging projection projects from the through hole and engages with the first engaging concave portion, the first engaging protrusion is located at the tip end side of the insertion piece of the through hole. It is preferable that the first engaging recess is formed so as to contact the inner wall portion of the first engaging concave portion on the side of the insertion piece while being in contact with the inner wall portion. When the insertion piece is pulled out from between the substrate and the rotating piece, that is, when a force is applied to the insertion piece that strongly pulls the insertion piece from the tip side to the base side, the through hole formed in the insertion piece is The inner wall portion on the tip side of the insertion piece presses the first engaging projection from the tip side of the insertion piece toward the root side. However, in this case, since the first engaging projection is also in contact with the inner wall of the first engaging concave portion on the base side of the insertion piece, the more strongly the insertion piece is pulled, the more the second engagement projection is pulled. The first engaging projection is strongly sandwiched between the inner wall of the through hole and the inner wall of the first engaging recess. Therefore, the rotating piece is prevented from rotating on its own, and the first engaging projection is prevented from being released from the first engaging concave part on its own.

In the locking device according to the present invention, when the rotating piece is rotated and the other end is superimposed on the surface of the inserting piece, the rotating piece is protruded toward the surface of the inserting piece. It is preferable to include a second engagement projection formed and a second engagement recess formed on the surface of the insertion piece for engaging the second engagement projection. In this case, the first engaging protrusion engages with the through hole and the first engaging recess, and the second engaging protrusion engages with the second engaging recess. Further, it is possible to obtain a locking device having a strong pulling force.

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments of the present invention with reference to the drawings.

[0009]

[Embodiment of the invention]

 FIG. 1 is a perspective view showing an example of a case using the locking device according to the present invention, and FIG. 2 is a perspective view showing a state in which a cover plate of the case shown in FIG. 1 is opened. The lock 10 includes a male member 12 and a female member 14. The male member 12 and the female member 14 of this embodiment are formed of, for example, a synthetic resin such as polyacetal. The male member 12 is fixed to the cover plate 101 of the case 100, and the female member 14 is fixed to the front plate of the box 102 of the case 100.

FIG. 3A is a front view of the male member 12, and FIG. 3B is a side view thereof. The male member 12 includes a mounting piece 16 arranged on the front surface of the lid plate 101 of the case 100. A mounting pin 18 protrudes from the rear surface of the mounting piece 16. The mounting pins 18 pass through the cover plate 101 and are inserted from the front side in the thickness direction to the rear side. A holding piece 20 is arranged on the back surface of the cover plate 101. The mounting pin 18 is inserted into the holding piece 20 and then caulked so as to be crushed. In this way, as shown in FIG. 7, the male member 12 is fixed to the cover plate 101 in a state where the cover plate 101 is sandwiched between the mounting piece 16 and the holding piece 20 from both sides in the thickness direction.

An insertion piece 22 is formed integrally with the attachment piece 16 of the male member 12. The insertion piece 22 is formed by rounding a substantially strip-shaped tip when viewed from the front. A substantially rectangular through hole 24 is formed at a substantially central portion of the insertion piece 22. The outer shape of the through hole 24 is formed so as to conform to the outer shape of a first engaging projection 42 described later. Further, the insertion piece 22 is formed such that the thickness thereof gradually decreases from a substantially central portion in the longitudinal direction of the through hole 24 toward the tip end of the insertion piece 22 so that the second piece having a substantially wedge-shaped cross section is formed. Is formed. A second engaging projection 40 having a substantially semicircular cross section, which will be described later, is fitted to the thinnest portion of the second engaging concave portion 26.

A step 28 is formed at the boundary between the mounting piece 16 and the insertion piece 22 on the surface of the male member 12 so as to protrude from the surface of the mounting piece 16 in the thickness direction. On the other hand, a barrier portion 30 is formed on the back surface of the male member 12 at the boundary between the attachment piece 16 and the insertion piece 22 so as to protrude from the back surface of the attachment piece 16 in the thickness direction.

FIG. 4A is a front view of the female member 14, and FIG. 4B is a cross-sectional view taken along line BB of FIG. 4A. The female member 14 includes a substrate 32. As shown in FIGS. 6 and 7, the back surface of the insertion piece 22 is in contact with and supported on the front surface of the substrate 32. Side walls 34 are erected on both sides of the insertion piece 22 on the surface of the substrate 32. The side wall 34 serves as a guide when the insertion piece 22 is inserted into or pulled out of the substrate 32, and supports the insertion piece 22 from both sides in the width direction after the insertion is completed.

A turning piece 36 is arranged on the substrate 32. A pivot 38 protrudes from both ends of one end of the rotating piece 36. The pivot 38 is rotatably supported by the side wall 34. Then, the rotating piece 36 has its one end rotated about 180 degrees in the direction substantially perpendicular to the main surface of the insertion piece 22 along the direction in which the insertion piece 22 enters and exits. At the time of opening movement, the rotating piece 36 has a state in which the other end extends downward in FIG. 2 when viewed from one end. As shown in FIGS. 6 and 7, a space slightly larger than the maximum thickness of the insertion piece 22 is formed between the surface of the base plate 32 and the main surface of the rotating piece 36 so as to insert the insertion piece 22 as shown in FIGS. Is performed. The insertion piece 22 is inserted and removed in the longitudinal direction from between one end of the rotating piece 36 and the surface of the substrate 32. In this specification, this direction is referred to as an incoming / outgoing direction.

As shown in FIGS. 2, 5 and 7, a second engaging projection 40 having a semicircular cross section is protruded from one main surface in the thickness direction at one end of the rotating piece 36. It is formed. When the insertion piece 22 is completely inserted between the rotating piece 36 and the board 32, the barrier portion 30 of the male member 12 comes into contact with the end face of the board 32. In this state, the second engaging projection 40 of the rotating piece 36 is fitted into the thinnest portion of the second engaging recess 26 of the insertion piece 22. In the portion where the second engaging projection 40 is formed, the thickness of the rotating piece 36 is increased, so that when the insertion piece 22 is inserted between the substrate 32 and the rotating piece 36, In other words, the rotating piece 36 can rotate only when the second engaging projection 40 is fitted into the second engaging concave portion 26. When the rotating piece 36 is rotated about the pivots 38 on both sides of one end thereof in a direction substantially perpendicular to its main surface, the second engaging projection 40 draws a circular orbit. The second engaging recess 26 is formed so that the thickness thereof gradually decreases.

As shown in FIG. 4, FIG. 5, and FIG. 7, a first engaging projection is provided at a central portion in the width direction just inside the second engaging projection 40 at one end of the rotating piece 36. 42 is formed to protrude in the thickness direction. The first engaging projection 42 of this embodiment is a quadrangular cylindrical projection. The first engaging projection 42 is inserted into the through hole 24, protrudes from the front side to the rear side of the insertion piece 22, and can be engaged with the first engaging recess 44 formed on the substrate 32. It is formed as follows. That is, the first engaging projection 42 has both side walls in the width direction fitted to both inner walls in the width direction of the through hole 24, and one side wall of the rotating piece has one end of the through hole 24 of the insertion piece 22. The other end side wall of the rotating piece is fitted exactly to the inner wall portion 44a of the first engaging recess 44 of the substrate 32 on the insertion piece root side. When the rotating piece 36 is rotated about the pivots 38 on both sides of one end thereof in a direction substantially orthogonal to the main surface, the first engaging projection 42 draws a circular orbit. The through hole 24 is formed in a long hole shape so as not to be present.

On the substrate 32 of the female member 14, a first engaging concave portion 44 for engaging the first engaging protrusion 42 is formed. In this embodiment, the first engaging concave portion 44 is formed penetrating the substrate 32 in the thickness direction. The first engagement projection 42 and the second engagement projection 40 are fitted to and removed from the first engagement recess 44 and the second engagement recess 16 by rotating the rotating piece 36. Can be. The first engaging concave portion 44 of this embodiment is also a molding hole for injection-molding the substrate 32.

The mounting pins 18 protrude from the rear surface of the substrate 32. The mounting pin 18 is inserted through the front plate of the box 102 from the front side in the thickness direction to the rear side. The holding piece 20 is arranged on the back surface of the front plate of the box 102. The mounting pin 18 is also inserted into the holding piece 20 and caulked so as to be crushed. Thus, the female member 14 is fixed to the box 102 with the front plate of the box 102 held between the substrate 32 and the holding pieces 20 from both sides in the thickness direction.

When the cover plate 101 of the case 100 is fastened to the box 102 with the locking tool 10, first, an insertion piece is inserted between the substrate 32 and the rotation piece 36 from one end side of the rotation piece 36. Insert 22. Next, the rotating piece 36 is substantially orthogonal to the main surface thereof so that the state shown in FIG. 2 is changed to the state shown in FIG. 1, that is, the tip of the rotating piece 36 overlaps the base side of the insertion piece 22. In the direction in which the insertion piece 22 enters and exits. Then, as shown in FIG. 7, the first engaging projection 42 formed on the rotating piece 36 is inserted into the through hole 24 formed on the insertion piece 22, and (1) Engagement Engage with the concave portion 44. In this state, if a direction of pulling out the insertion piece 22 from between the substrate 32 and the rotating piece 36, that is, a force pulling the insertion piece 22 from the tip side to the base side of the insertion piece 22, the insertion piece 22 The inner wall portion 24a on the tip side of the insertion piece of the formed through hole 24 presses the first engaging projection 42 from the tip side of the insertion piece toward the root side. However, since the tip of the first engaging projection 42 is in contact with the inner wall portion 44a of the first engaging concave portion 44 at the base of the insertion piece, the more strongly the insertion piece 22 is pulled, the more it is pulled. The first engagement protrusion 42 is strongly sandwiched between the inner wall 24a of the through hole 24 and the inner wall 42a of the first engagement recess 42. Therefore, the rotating piece 36 is prevented from rotating on its own, and the first engaging projection 42 is prevented from being detached from the through hole 24 and the first engaging concave portion 44 on its own. Therefore, even when a strong pulling force is applied to the insertion piece 22, the first engagement projection 42 does not come off the first engagement recess 44 without permission. The insertion piece 22 does not fall out from between. Therefore, in the locking device 10, the insertion piece 22, the substrate 32, and the rotating piece 36 can be firmly connected, and the lid 101 of the case 100 and the box 102 can be securely fastened.

When the cover 101 of the case 100 is opened by the locking tool 10, the state shown in FIG. 1 is changed to the state shown in FIG. The first engaging projection 42 is rotated by 180 degrees in a direction substantially perpendicular to the main surface thereof in a direction opposite to the above direction so that the first engaging projection 42 is disposed on the front end side of the first engagement portion. It is displaced in the thickness direction of the mounting recess 44 and the through hole 24. As a result, the first engagement protrusion 42 is separated from the first engagement recess 44 and the through hole 24, and the insertion piece 22 can be easily extracted from between the substrate 32 and the rotating piece 36. . That is, in this locking device 10, the locked state is released without permission unless the user rotates the rotating piece 36 in the direction of insertion and removal of the insertion piece 22 in a direction substantially orthogonal to the main surface thereof. Never.

Further, in the locking device 10, since the second engaging projection 40 is engaged with the second engaging concave portion 26, it is possible to strongly resist the pulling force. Also, in this locking device 10, a wedge-shaped projection 46 is formed on one main surface near the other end of the rotating piece 36. By hooking the protrusion 46 on the step 28 of the male member 12, it is possible to more strongly resist the pulling force.

[0022]

[Effect of the invention]

 As described above, in the locking device according to the present invention, even when a force for strongly pulling the insertion piece is applied, the first engaging projection does not separate from the first engaging concave portion, and rotates with the substrate. The insertion piece does not come out without permission from the moving piece. Therefore, according to this locking tool, the insertion piece, the base plate and the rotating piece can be securely and firmly connected.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a case using the locking device according to the present invention.

FIG. 2 is a perspective view showing a state in which a cover plate of the case shown in FIG. 1 is opened.

FIG. 3A is a front view of a male member, and FIG. 3B is a side view thereof.

FIG. 4A is a front view of a female member, and FIG. 4B is a cross-sectional view taken along line BB.

FIG. 5 is a front view showing a state where the insertion piece is inserted between the substrate and the rotating piece.

FIG. 6 fully inserts the insertion piece between the substrate and the rotating piece,
FIG. 8 is a front view showing a state in which the first engagement projection is engaged with the first engagement recess by rotating the rotation piece.

FIG. 7 is a sectional view taken along line VII-VII shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Locking member 12 Male member 14 Female member 16 Mounting piece 18 Mounting pin 20 Nipping piece 22 Insertion piece 24 Through hole 26 Second engaging concave part 28 Step part 30 Barrier part 32 Substrate 34 Side wall 36 Rotating piece 38 Axis 40 Second fastening projection 42 First fastening projection 44 First fastening recess 46 Projection

Claims (3)

[Utility model registration claims] An insertion piece; a substrate supporting a back surface of the insertion piece; a side wall erected on a surface of the substrate to guide both sides in a width direction of the insertion piece; A rotating piece whose one end is pivotally supported on the substrate and whose other end is rotated in a direction substantially perpendicular to the main surface thereof along the inward / outward direction of the insertion piece to support a surface of the piece; The insertion piece was inserted between the rotation piece and the substrate surface from one end side of the rotation piece, the rotation piece was rotated, and the other end was overlapped with the surface of the insertion piece. A first engaging projection formed on the rotating piece so as to penetrate the insertion piece in the thickness direction and engage with the surface of the substrate; and form the insertion piece so as to penetrate the insertion piece in the thickness direction. And a through-hole for projecting the first engagement projection from the one side of rotation to the substrate side; and A first engagement portion for engaging the first engagement protrusion projecting from the through hole;
And a locking recess. 2. The first engaging projection, when projecting from the through hole and engaging with the first engaging recess, contacts the inner wall portion of the through hole at the tip end side of the insertion piece. The latch according to claim 1, wherein the latch is formed so as to be in contact with the inner wall portion of the first engagement recess at the base of the insertion piece. 3. A rotary member formed on the rotary piece so as to project toward the surface of the insert piece when the rotary piece is rotated and the other end is overlapped on the surface of the insert piece. The second engaging projection, and a second engaging recess formed on the surface of the insertion piece for engaging the second engaging projection. 3. The locking device as described.