TWI524855B - A buckle with a key lock - Google Patents

Description

Buckle with key lock

The present invention relates to a buckle having a key lock, and more particularly to an improvement in the thinning of a buckle having a key lock and an improvement in operability.

In the past, in the middle open type buckle, a buckle having a key lock structure is well known. In such a buckle, a push release piece for releasing the engagement with the plug is provided in the socket, and the release piece is pressed here, and a rotor functioning as an eccentric cam is attached, and the rotation is freely rotatable. Further, in the socket, the lock cover is slidably attached to cover the pressing release piece and the rotor. Therefore, the buckle is composed of five parts formed by a plug, a socket, a rotor, a lock cover, and a key for rotating the rotor.

In the buckle described in Patent Document 1, the lock cover slides in accordance with the amount of rotation of the rotor, and is positioned at a position that can be pressed or cannot be pressed together with the release piece. Further, according to the buckle, when the plug is engaged with the socket, when the key is inserted into the rotor through the key hole of the lock cover, the key is operated, and when the rotor is rotated, the rotor functions as an eccentric cam. Thereby, the locking cover slides down in a state covered with the pressing release piece. Move to a position that cannot be pressed. Therefore, since the press release piece is also covered by the lock cover and cannot be pressed, the engagement between the socket and the plug cannot be released, and the buckle is in the key lock state.

Conversely, when the key inserted into the rotor is further rotated or turned back in the opposite direction to the foregoing, the lock cover is slid to the depressible position, and the key lock of the buckle is released. Then, by pressing the lock cover with the entire press release piece to release the engagement between the plug and the socket, the plug can be pulled out of the socket.

Further, as a buckle having a lock, it is known that a drum lock is used for both the rotor and the lock cover. Therefore, the buckle is composed of four parts formed of a plug, a socket, a drum, and a key for rotating the drum (for example, refer to Patent Document 2).

In the buckle of Patent Document 2, the engagement with the socket is released by pressing the engagement portion provided in the plug and engaged with the socket. Further, when the plug is engaged with the socket, the key is rotated by the key, and when the lock arm provided on the drum is located between the engagement portion of the plug and the inner wall surface of the socket, the engagement portion of the plug is blocked by the lock arm and becomes Cannot be pressed, the plug and the socket cannot be released, and the buckle becomes the key lock state.

Further, by further rotating the key or returning in the opposite direction, the lock arm is moved to a position shifted from the engagement portion of the plug, and the engagement portion is in a state in which the pressing operation is possible, and the key lock is released by pressing the card of the plug. When the joint is closed, the plug and the socket are released, and the socket can be pulled out.

[Advanced technical literature] [Patent Literature]

[Patent Document 1] Japanese Real Fair 7-46166

[Patent Document 2] US Patent No. 4,930,324

However, the buckles described in Patent Documents 1 and 2 have many components, and therefore there is a limit in reducing the thickness of the entire buckle. In addition, since the drum of the patent document 2 is a component that is unitized as a key cylinder, the size of the component is also large, and the number of parts is small compared to the buckle of Patent Document 1, but the entire buckle is large. The problem arises.

Further, according to the buckle described in Patent Documents 1 and 2, in order to lock the buckle for the key, it is necessary to insert the plug into the socket and engage the key, and then use the key to perform the key operation. Conversely, when the plug is pulled out of the socket, it is necessary to perform the operation of releasing the key lock by the key operation and then releasing the engagement between the plug and the socket. As described above, when the key is locked, the key operation at the time of the release, and the like, there is a problem that it takes time to insert and remove the plug and the socket.

An object of the present invention is to provide a buckle with a key lock that can be made thinner and has good operability.

The buckle with a key lock of the present invention is composed of a plug and a socket which are freely detachably provided, and a key different from the plug and the socket, and the socket has a surface wall which is disposed at intervals in the front and rear directions and The back wall is provided with an opening for inserting and removing the plug between the surface wall and the back wall, and the surface wall has a key hole penetrating the surface wall, and one of the plug and the socket is provided The elastically deformable elastic engagement piece is provided with an engagement portion that engages with the elastic engagement piece on the other of the plug and the socket, and the key is a rotary type, and the key is inserted into the key In the key-side pressing portion of the keyhole of the socket, the elastic engagement piece is provided with an engagement piece-side pressing portion that is pressed by the key-side pressing portion in association with the rotation of the key, and the engaging piece side is pressed The pressing portion elastically deforms the elastic engagement piece to release the engagement between the elastic engagement piece and the engagement portion.

According to the present invention, since the components of the buckle are three components of the plug, the socket, and the key, the conventional rotor, the lock cover, or the roller is not required, and the thickness can be reduced.

Further, the plug and the socket are engaged with each other by pressing the engagement piece and the engagement portion, and in order to release the engagement state, there is no other method than the use of the key, and external operation other than the key cannot be performed. Released. That is, the engagement operation by inserting the plug into the socket directly becomes a key lock operation, and the key operation at the time of key lock can be eliminated. Further, since the unlocking of the key is directly performed as the engagement release operation, it is not necessary to perform the operation for releasing the engagement again after the lock is released. Thereby, the operability of the buckle can be greatly improved.

In the buckle with a key lock of the present invention, the aforementioned key system In the rotary type including the insertion portion inserted into the key hole, the insertion portion is formed by a shaft portion having a rotation center and a plurality of key side pressing portions protruding from the outer circumference of the shaft portion toward both sides in the radial direction. The engagement piece side pressing portion is provided with a pressing surface on which the key side pressing portion is attached in response to the rotation of the key, and the key side pressing portion is provided with the engaging piece side pressing portion when riding on the pressing surface The inclined surface of the end edge contact.

According to the present invention, the key can be unlocked only after the key is inserted into the keyhole, and the lock and the engagement can be released. Therefore, even if the item other than the key is to be inserted into the keyhole and released, it is not easy to release, and the security is good.

When the key is released by the key operation, the key is pressed to the key side pressing portion to the pressing surface of the engaging piece side pressing portion. However, since the key side pressing portion is provided with the inclined surface, the inclined surface contacts the engaging piece side. Since the end edge of the pressing portion is provided, the rotation of the key can be made to make the riding operation of the key side pressing portion to the pressing surface smooth, and the operability of the key can be improved.

In the buckle with a key lock according to the present invention, the pressing surface is inclined from the front end side of the elastic engagement piece toward the proximal end side so as to come into contact with the key side pressing portion in accordance with the rotation of the key.

According to the present invention, when the elastic engagement piece is provided on the plug side, the pressing surface of the engagement piece side pressing portion is inclined, and the key side pressing portion not only presses the pressing surface to deform the elastic engagement piece, but also with the rotation of the key. It is also pressed in the direction in which the plug is pulled out. In addition to the unlocking of the plug and the release of the latch, the plug can be pushed out of the socket by a predetermined amount, and the subsequent plug removal operation can be easily performed.

In the buckle with a key lock according to the present invention, the rotation center of the key is offset from one of the center of the plug and the width direction of the socket toward the one side in the width direction, and the inclined surface of the key side pressing portion is attached to A position shifted from the rotation center of the key toward the other side in the width direction is in contact with the engagement piece side pressing portion.

The key side pressing portion protrudes in the radial direction from the shaft portion that is the center of rotation, and is provided offset from the center of rotation. Therefore, when the center of rotation of the key coincides with the center of the width direction of the plug and the socket, the contact position of the key side pressing portion with the elastic engaging piece is shifted from the center of the width direction, and the elastic engaging piece cannot be elastically equalized. The possibility of deformation arises.

Therefore, in the present invention, the center of rotation of the key is shifted from the center in the width direction, and the key-side pressing portion contacts the elastic engagement piece at a position close to the center in the width direction, whereby the elastic engagement piece can be prevented from being biased. By the deformation, the engagement between the elastic engagement piece and the engaging portion can be more reliably released.

1‧‧‧ buckle

2‧‧‧ plug

3‧‧‧ socket

4‧‧‧ key

24, 137‧‧‧ elastic snap-in piece

28‧‧‧Kneading side press

36‧‧‧ keyhole

37‧‧‧As the engaging projection of the engaging portion

42‧‧‧Insert Department

44‧‧‧Axis

45‧‧‧Key side pressing

45A‧‧‧Slope

28A‧‧‧ Pressing surface

127‧‧‧Care Department

C1‧‧ Center

O1‧‧‧ Rotation Center

Fig. 1 is an exploded perspective view showing a buckle according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view showing a state before the plug and the socket constituting the buckle are engaged, as viewed from the arrow II-II of Fig. 1.

Fig. 3 is a plan view showing a part of a cross section of the buckle in a state in which the plug is engaged with the socket.

Fig. 4 is a cross-sectional view showing the buckle constituting the state in which the plug is engaged with the socket, as viewed from the arrow IV-IV of Fig. 3.

Fig. 5 is a first view for explaining the operation of the plug accompanying the key operation at the time of unlocking.

Fig. 6 is a second diagram for explaining the operation of the plug accompanying the key operation at the time of unlocking.

Fig. 7 is a cross-sectional view showing the buckle in a state in which the key operation is completed and the lock is released.

Fig. 8 is an exploded perspective view showing a modification of the present invention.

Fig. 9 is a cross-sectional view showing another modification of the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

In Fig. 1 and Fig. 2, the buckle 1 is formed as an open buckle in a locking mechanism, and is formed by a plug 2 and a socket 3 which are freely detachable from each other, and a key 4 inserted into the socket 3, respectively. It consists of three parts made of synthetic resin. In other words, the buckle 1 is provided with the key 4, but the conventional rotor, the lock cover, or the drum is not used, and the number of components can be reduced, and the thickness can be further reduced.

The plug 2 includes a grip portion 21 having a flat surface 21A and a back surface 21B. The grip portion 21 is provided with an opening portion 22A penetrating the front surface 21A and the rear surface 21B, and a belt winding rod 22B is provided in the opening portion 22A along the width direction of the plug 2. With these openings 22A and the belt winding lever 22B constitute the belt mounting portion 22. On both sides in the width direction of the grip portion 21, a pair of guide pieces 23, 23 extending toward the plug-in socket 3 side are provided. Further, the grip portion 21 is extended to be disposed between the pair of guide pieces 23, 23 in the elastic engagement piece 24. The slit 25 is formed between the guide piece 23 and the elastic engagement piece 24.

On the back surface 23A of the guide piece 23, a groove portion 26 continuous along the extending direction of the guide piece 23 (same as the direction in which the socket 3 is inserted and removed) is provided. The groove portion 26 is formed to be engaged with the ridge portion 54 (see FIG. 3) provided in the socket 3, and it is possible to prevent the plug 2 from being inserted upside down into the socket 3.

Further, on the surface 24A of the elastic engagement piece 24, an engagement recess 27 having a rectangular viewing angle is provided. The engagement recessed portion 27 includes an inclined surface 27A that is deeper in depth toward the distal end side in the insertion direction, and an engaging portion 27B that makes the edge of the inclined surface 27A continuous with the edge of the surface 24A. .

Further, the distal end side of the elastic engagement piece 24 is formed as an engagement piece side pressing portion 28 that is slightly bent toward the back surface 24B. The engaging piece side pressing portion 28 is provided with a pressing surface 28A that is fan-shaped recessed from the front end edge to the base end side. Therefore, the thickness of the distal end side of the elastic engagement piece 24 is thinner than the portion corresponding to the pressing surface 28A, so that the key side pressing portion 45 to be described later can be easily taken. The pressing surface 28A is a surface that is curved in a shape that is bent after the engagement piece side pressing portion 28 is bent, and is inclined from the front end side of the elastic engagement piece 24 toward the proximal end side so as to be in contact with the key side pressing portion 45 with the rotation of the key 4 . The contact resistance becomes large.

The socket 3 is constructed as a hollow part, and is provided with The surface wall 31 and the back wall 32 which are disposed at intervals in the opposite direction, and the side walls 33 covering the walls. In the socket 3, on the side of the plug 2, an opening 34 for performing the insertion and removal is provided. On the opposite side of the opening 34 of the socket 3, a rectangular notch opening 35A is provided, and in the notch opening 35A, a belt winding lever 35B is provided along the width direction of the socket 3. The belt attachment portion 35 on the socket 3 side is constituted by the notch opening 35A and the belt winding lever 35B.

The surface wall 31 is provided with a key hole 36 penetrating the front surface 31A and the back surface 31B. The shape of the keyhole 36 can be appropriately determined depending on the shape of the key 4. However, in the present embodiment, the circular hole portion 36A and the angular hole portions 36B provided on both sides in the radial direction are formed. Here, in the buckle 1, the engagement of the plug 2 and the socket 3 cannot be cancelled except for the key operation. Therefore, in the surface wall 31 of the socket 3, other openings are not provided except for the keyhole 36, and an opening or the like which can press the elastic engagement piece 24 of the socket 3 in the engaged state from the outside is not provided.

Further, the inner surface 31B of the surface wall 31 is provided with an engaging convex portion 37 as an engaging portion that protrudes downward. The engaging convex portion 37 is formed in a shape that can be accommodated in the engaging recessed portion 27 of the plug 2, and includes an inclined surface 37A that is inclined in the same direction as the inclined surface 27A of the engaging recessed portion 27, and an inclined surface 37A. The engaging portion 37B on the side of the socket 3 in which the end edge and the back surface 31B are continuous.

The key 4 is provided with an annular knob portion 41, an insertion portion 42 integrally provided in the knob portion 41 for insertion into the key hole 36 of the socket 3, and similarly integrally provided in the knob portion 41, and Insertion part 42 When entering the keyhole 36, it abuts against the abutment portion 43 of the surface wall 31. The insertion portion 42 of the key 4 is formed by a cylindrical shaft portion 44 that is inserted into the circular hole portion 36A of the key hole 36, and a pair of the corner hole portion 36B that protrudes from both sides of the shaft portion 44 in the radial direction and is inserted into the corner hole portion 36B. The key side pressing portion 45 is configured. The key 4 inserted into the keyhole 36 is rotatable in the clockwise direction with the central axis of the shaft portion 44 as the center of rotation O1 (see FIG. 4). However, the shape of the key 4 is not limited to this, and if the pressing surface 28A of the plug 2 can be pressed by turning the key 4, any shape can be adopted.

Each of the key side pressing portions 45 is provided with an inclined surface 45A (see FIG. 4) that is inclined in the same direction in the circumferential direction. Specifically, the inclined surface 45A is inclined so that the front end of the key side pressing portion 45 is tapered as the tip end in the insertion direction is formed, and the entire key side pressing portion 45 is rotated at the center O1 in the plane view angle (see FIG. 5 and FIG. 6) A point symmetrical shape as the center of the object. By such inclination, the inclined surface 45A is in contact with the edge of the engaging piece side pressing portion 28 at an acute angle on the pressing surface 28A side.

The state in which the plug 2 is inserted into the socket 3 will be described in detail with reference to FIGS. 3 and 4.

In the socket 3, between the surface wall 31 and the back wall 32, two guide ribs 51 which are parallel to the insertion and removal direction of the plug 2 are provided. The guiding rib 51 enters the slit 25 when the plug 2 is inserted. The space between the guide rib 51 and the side wall 33 opposed to the width direction thereof is a guide piece accommodating portion 52 into which the guide piece 23 of the plug 2 enters. Further, the space between the pair of guiding ribs 51 serves as an engaging piece accommodating portion into which the elastic engaging piece 24 enters. 53.

In the guide piece accommodating portion 52, a rib portion 54 continuous along the insertion and removal direction is provided on the inner surface 32A of the rear surface wall 32. As described above, the ridge portion 54 and the guide piece 23 provided on the plug 2 are provided. The groove portion 26 is engaged. Further, in the engaging piece accommodating portion 53, the engaging recessed portion 27 of the plug 2 is housed in the engaging convex portion 37 of the socket 3, and the engaging portions 27B and 37B of each other are engaged with each other.

Here, when the plug 2 and the socket 3 are in the engaged state, a slight gap (swim) is generated in the insertion and removal direction therebetween. When the jump is filled by the plug 2, the front end of the elastic engagement piece 24 of the plug 2 abuts against the abutment portion 53A in the opposite engagement piece accommodating portion 53 (the state of FIG. 3) ). On the other hand, when the plug 2 is placed closest to the drawing side and the wander is filled, the engaging portions 27B and 37B are engaged with each other, and the plug 2 is maintained so as not to be detached from the socket 3.

Inside the socket 3, a contact portion 55 is provided around the keyhole 36 at a position corresponding to each of the corner holes 36B of the keyhole 36. The abutting portion 55 is located on the opposite side of the inclined surface 45A of the inserted key 4, and when the key 4 is to be rotated in the counterclockwise direction, the key side 4 is brought into contact with the key side pressing portion 45, so that the key 4 cannot be rotated.

At this time, the back side (the side of the elastic engagement piece 24) of the abutting portion 55 on the side close to the elastic engagement piece 24 of the plug 2 is a part of the abutting portion 53A to which the elastic engagement piece 24 abuts. Therefore, since the plug 2, the key 4, and the like are in contact with each other in the abutting portions 53A and 55, a greater strength is required. Therefore, in the present embodiment, the outer shape of the distal end of the elastic engagement piece 24 is formed into a bilaterally asymmetric shape having the inclined edge 24C. The thickness between the abutting portions 53A and 55 is set to a sufficient size corresponding to the deformed shape, and the strength between the abutting portions 53A and 55 is secured.

The corner hole portion 36B of the keyhole 36 communicates with the key-side pressing portion 45 via the passage space on the rotational locus that the key 4 rotates in the clock direction. The pressing surface 28A of the engaging piece side pressing portion 28 provided in the plug 2 is located in the passing space in the passing space of one of the passing spaces, and immediately after the key 4 is rotated, the inclined surface 45A of the one key side pressing portion 45 is The front end edge of the engagement piece side pressing portion 28 is in contact with each other, and then the elastic engagement piece 24 is pressed and deformed by riding on the pressing surface 28A. One of the inner walls of the other space serves as the abutting portion 56 to which the other key side pressing portion 45 of the key 4 abuts, and the rotational angle of the key 4 is limited to 90°.

In the keyhole 36, the center position O2 of the keyhole 36 is coaxial with the center of rotation O1 of the key 4, and the center position O2 is offset by the center C1 in the width direction common to the plug 2 and the socket 3 in FIG. The right position in the middle. With this configuration, the key side pressing portion 45 that is in contact with the engaging piece side pressing portion 28 is provided on the left side of the center in the center O1 and O2 in Fig. 3, and when the key 4 is rotated, it is close to the center C1. At the position, the key side pressing portion 45 and the engagement piece side pressing portion 28 can be brought into contact with each other. Therefore, when the elastic engagement piece 24 is pressed by the key side pressing portion 45, the pressing force transmitted from the key side pressing portion 45 acts on the center C1 in the width direction of the elastic engagement piece 24, thereby preventing the elastic engagement piece 24 from being prevented. When the center C1 is largely displaced and pressed, it is possible to reliably cancel the engagement state and the push-out operation of the plug.

But actually, actually, the key side pressing portion 45 and the elasticity The contact position of the engaging piece 24 is shifted toward the left side in FIG. 3 as much as the center C1. Therefore, in the embodiment in which the elastic engagement piece 24 is pressed by the key side pressing portion 45 immediately after the key 4 is rotated, there is a possibility that the elastic engagement piece 24 is deformed in a deformed state. That is, the elastic deformation on the side opposite to the centers O1 and O2 across the center C1 becomes slightly larger.

Therefore, in the present embodiment, the engagement recessed portion 27 of the plug 2 and the engagement convex portion 37 of the socket 3 are arranged such that the center C2 in the width direction is offset from the center C1 of the entire position on the left side even in the elastic engagement piece 24 When it is biased and elastically deformed, the engagement state of the engagement recessed portion 27 and the engagement convex portion 37 can be more reliably canceled.

Hereinafter, the operation of the buckle 1 will be described with reference to Figs. 4 to 7 .

First, as shown in FIG. 4, when the plug 2 is inserted into the socket 3, the elastic engaging piece 24 of the plug 2 comes into contact with the engaging convex portion 37 of the socket 3 with the insertion, and the elastic engaging piece 24 faces the figure. The lower side is pressed and passes through the engaging convex portion 37. When the engaging portion 27B provided in the engaging recessed portion 27 of the elastic engaging piece 24 passes the engaging portion 37B of the engaging convex portion 37, the elastic deformation of the elastic engaging piece 24 is restored, and the engaging portions 27B, 37B are mutually engaged. Ground snap. This state is a state in which the plug 2 is engaged with the socket 3.

In this engagement state, since the elastic engagement piece 24 is pressed from the outside by hand operation or the like, the engagement between the plug 2 and the socket 3 cannot be released, and the plug 2 cannot be pulled out from the socket 3. That is, at the time when the plug 2 and the socket 3 are brought into engagement, the plug 2 locks the socket 3 with a key, and it is not necessary to perform a key lock operation using the key 4 after the engagement.

Next, when the lock is released and the engagement is released from the socket 3 as shown in FIG. 4, the key 4 is inserted into the key hole 36, and as shown in FIG. 5, the key 4 is rotated in the clockwise direction. . Then, immediately after the rotation, the inclined surface 45A provided on the key side pressing portion 45 comes into contact with the front end edge of the engagement piece side pressing portion 28, and rides on the pressing surface 28A to press the elastic engagement piece 24 downward. The pressed elastic engagement piece 24 is elastically deformed, and the engagement recessed portion 27 is disengaged from the engagement convex portion 37 at the initial stage of the rotation operation of the key 4, and the engagement with each other is released.

Further, as shown in FIG. 6, when the turning operation of the key 4 travels to a predetermined angle, the elastic engaging piece 24 abuts against the back wall 32 of the socket 3 while the predetermined angle is reached, and the elastic deformation is stopped (FIG. 7). ). Further, since the key side pressing portion 45 and the inclined pressing surface 28A of the plug 2 are still rubbed together with the rotation of the key 4, the pressing surface 28A, as shown by the reverse arrow in the figure, will have the plug 2 facing Push the pressing force of the direction press.

As a result, the plug 2 is pushed out to a predetermined position that is easy to grip as shown in FIG. Then, pull out the plug 2. As described above, by inserting the key 4 and rotating it, not only the locked state of the plug 2 and the socket 3 but also the interlocking state is released, and the operation of pushing the plug 2 by a predetermined amount is performed.

According to the above embodiment, the following effects can be obtained.

In other words, since the components of the buckle 1 are three components of the plug 2, the socket 3, and the key 4, the conventional rotor and the upper body are not required. Parts such as a lock cover or a roller can be promoted to be thinner.

In the buckle 1, since the locking operation by inserting the plug 2 into the socket 3 directly becomes a key locking operation, the key operation at the time of locking can be eliminated. Further, since the unlocking of the key 4 is directly performed as the engagement release operation, it is not necessary to perform the operation for releasing the engagement again after the lock is released. Thereby, the operability of the buckle 1 can be greatly improved.

In the buckle 1, since the key 4 is not only inserted into the keyhole 36 but rotated, the lock and the engagement can be released. Therefore, even if an item other than the special key is to be inserted into the keyhole to be released, it is difficult to release. , good security.

In addition, when the key side pressing portion 45 of the key 4 needs to be boarded on the engagement piece side pressing portion 28, the key side pressing portion 45 is provided with the inclined surface 45A, and the inclined surface 45A is provided. Since the end edge of the engagement piece side pressing portion 28 is in contact with each other, the riding operation of the key side pressing portion 45 accompanying the rotation of the key 4 can be made smooth, and the operability of the key 4 can be improved.

In the buckle 1, the pressing surface 28A of the engaging piece side pressing portion 28 is inclined, and with the rotation of the key 4, the key side pressing portion 45 not only presses the pressing surface 28A to deform the elastic engaging piece 24 but also pulls the plug 2 Since the push-out direction is performed, the plug 2 can be pushed out of the socket 3 by a predetermined amount in addition to the unlocking of the plug 2 and the release of the lock, and the subsequent pull-out operation of the plug 2 can be easily performed.

In the buckle 1, due to the rotation center O1 of the key 4 from the plug 2 The center side C1 in the width direction of the socket 3 is offset, and the key side pressing portion 45 comes into contact with the elastic engagement piece 24 at a position close to the center C1. Therefore, the elastic engagement piece 24 can be prevented from being deformed by deformation, and the plug can be more reliably released. The engaging concave portion 27 on the second side is engaged with the engaging convex portion 37 on the side of the socket 3.

Further, the present invention is not limited to the above embodiment, and modifications within the scope that can achieve the object of the present invention are also included in the present invention.

For example, in the above embodiment, the key 4 is of a rotary type, but as shown in FIG. 8, it may be a plug-in type including a pair of key side pressing portions 45. In this case, the key side pressing portion 45 is provided with the inclined surface 45A so as to face the plug 2 side in the inserted state. As the structure on the side of the socket 3, the key hole 36 is constituted by the pair of corner holes 36B, and the key side pressing portion 45 is inserted into the equal-hole hole portion 36B. On the plug 2 side, the elastic engagement piece 24 is divided into left and right first and second engagement pieces 241 and 242, and the engagement recess 27 and the pressing surface 28A are also divided into right and left first and second concave portions 271 and 272, respectively. And the first and second pressing faces 281A and 282A. The engaging convex portion 37 of the socket 3, the pressing surface 28A of the plug 2, and the like are provided in correspondence with the entire width direction of the elastic engaging piece 24. Other configurations are substantially the same as those of the above embodiment.

In the above-described modification, the first and second engagement pieces 241 and 242 can be pressed by the inclined surface 45A by the insertion of the key 4, and the engagement of the first and second concave portions 271 and 272 with the engagement convex portion 37 can be released. In the state, the plug 2 is moved by the predetermined amount by the action of the inclined inclined surface 45A and the first and second pressing surfaces 281A and 282A. Further, in the present modification, since the first and second engagement pieces 241 and 242 are provided, the same is pressed at the same time. In the case of the engagement piece, the engagement state cannot be released, and even if the front end of the writing instrument or the like is inserted and only one of them is pressed, it cannot be released, and therefore the security is high. Further, the opening area of the corner hole portion 36B can be reduced to the extent that the key side pressing portion 45 can be inserted, so that the writing instrument itself can be easily inserted. Furthermore, the elastic engagement piece 24 can also be divided into three parts, and when it is not pressed at the same time, it cannot be released, and the security is further improved.

In the above embodiment, the elastic engagement piece 24 is provided on the plug side. However, as shown in FIG. 9, such an elastic engagement piece 137 may be provided on the socket 3 side, and the elastic engagement piece 137 card may be provided on the plug 2 side. The engaging portion 127 is combined. In such a configuration, the engaging piece 124 having the engaging portion 127 on the plug 2 side is provided with a pair (only one is shown in FIG. 9), and the key is inserted between the pair of engaging pieces.

In the above-described embodiment, the key 2 can be unlocked by the key 4, and the plug 2 can be pushed out by a predetermined amount. However, the plug 2 can be pushed by a predetermined amount. The inclination angle of the pressing surface 28A is only the structure in which the locking and the engagement state are released. For example, in the above-described embodiment, the pressing surface 28A is inclined, but the inclination may not be provided or the inclination direction may be changed. Alternatively, the inclined surface of the key side pressing portion 45 may be eliminated as in the configuration of the modification shown in FIG. The inclination of the pressing surface 28A of the 45A and the plug 2 is such that the plug 2 is not pushed out. With such a configuration, the plug 2 that has unlocked the key and is engaged can be pulled out from the beginning by hand.

In the above embodiment, the angle of rotation of the key 4 is limited to 90°, but even if the key 4 is configured to be rotatable by 360°, it is also included in the present invention. invention. The rotation angle is limited to a few degrees, and can be arbitrarily determined according to the implementation thereof.

[Industry use possibility]

In the present invention, the opening of the packaging case, the bag body, or the like in which the article is housed is configured to be closed by using a belt and a buckle, and the buckle can be preferably used to make the opening cover difficult to open.

1‧‧‧ buckle

2‧‧‧ plug

3‧‧‧ socket

4‧‧‧ key

21‧‧‧The Department of Control

21A‧‧‧through surface

21B‧‧‧Back

22‧‧‧Belt Installation Department

22A‧‧‧ Openings

22B‧‧‧Belt Winding Rod

23‧‧‧Leading film

23A‧‧‧Back

24‧‧‧Flexible snaps

24A‧‧‧End edge and surface

24B‧‧‧Back

24C‧‧‧Slanted edge

25‧‧‧slit

26‧‧‧Ditch

27‧‧‧Clamping recess

27A‧‧‧Sloping surface

27B, 37B‧‧‧Care Department

28‧‧‧Kneading side press

28A‧‧‧ Pressing surface

31‧‧‧ surface wall

31A‧‧‧through surface

32‧‧‧ Back wall

33‧‧‧ side wall

34‧‧‧ openings

35‧‧‧Belt Installation Department

35A‧‧ ‧ notch opening

35B‧‧‧Belt Winding Rod

36‧‧‧ keyhole

36A‧‧‧ round hole

36B‧‧ Corner hole

37‧‧‧As the engaging projection of the engaging portion

37A‧‧‧ sloped surface

41‧‧‧ knob section

42‧‧‧Insert Department

43‧‧‧Apartment

44‧‧‧Axis

45‧‧‧ Pressing Department

45A‧‧‧Slope

Claims (4)

A buckle with a key lock is composed of a plug (2) and a socket (3) which are freely detachably provided, and a key (4) different from the plug (2) and the socket (3), the socket ( 3) having a surface wall (31) and a back wall (32) which are disposed at intervals in the front and back directions, and between the surface wall (31) and the back wall (32), the plug (2) is inserted The opening (34) has a key hole (36) penetrating the surface wall (31), and one of the plug (2) and the socket (3) is elasticizable The deformed elastic engaging piece (24, 137) is provided with an engaging portion (37) that engages with the elastic engaging piece (24, 137) on the other of the plug (2) and the socket (3). 127), the key (4) is a rotary type, and the key (4) is provided with a key side pressing portion (45) inserted into a key hole (36) provided in the socket (3), and the elastic card is The splicing piece (24, 137) is provided with an engagement piece side pressing portion (28) pressed by the key side pressing portion (45) in association with the rotation of the key (4), and the pressing piece side pressing portion is pressed (28) Let the aforementioned elastic engaging pieces (24, 13) 7) The elastic deformation is performed to release the engagement of the elastic engagement pieces (24, 137) with the engaging portions (37, 127). The buckle with a key lock according to claim 1, wherein the key (4) is a rotary type having an insertion portion (42) inserted into the key hole (36), and the insertion portion (42) The shaft portion (44) having the rotation center (O1) and the key side pressing portion (45) protruding from both sides of the shaft portion (44) in the radial direction are formed on the engaging piece side. The pressing portion (28) is provided with a pressing surface (28A) on which the key side pressing portion (45) is rotated in response to the rotation of the key (4), and the key side pressing portion (45) is provided to rotate. An inclined surface (45A) that comes into contact with the end edge of the engaging piece side pressing portion (28) when the pressing surface (28A) is above the pressing surface. The buckle with a key lock according to the second aspect of the invention, wherein the pressing surface (28A) is inclined from a front end side of the elastic engagement piece (24) toward a base end side so as to be accompanied by rotation of the key (4). It is in contact with the aforementioned key side pressing portion (45). The buckle with a key lock according to claim 2 or 3, wherein the rotation center (O1) of the key (4) is from a center of a width direction of the plug (2) and the socket (3) ( C1) is shifted toward one side in the width direction, and the inclined surface (45A) of the key side pressing portion (45) is attached to A position shifted from the rotation center (O1) of the key (4) toward the other side in the width direction is in contact with the engagement piece side pressing portion (28).