JP4440699B2 - Locking device - Google Patents

Description

  The present invention relates to a locking device.

  As a locking device that is used in a non-detachable manner connected to a lock hole established in a personal computer or the like, the one described in Patent Document 1 is known. In this conventional example, the locking device has two locking bodies each provided with a locking hook at the tip, and a plug inserted into the case. Each lock body is equipped with a hook that can be locked in a lock hole established in a PC, etc. at one end. Is done.

When the lock body is inserted into the lock hole in the unlocked state where the hooks are close to each other, when the plug is rotated in the lock direction, the movable side lock body slides and engages with the lock hole, and is detached from the personal computer or the like. It is connected inseparably.
Registered Utility Model No. 3062010

  However, the conventional example in which the movable side locking body slides to change between the locking and unlocking postures has the following problems. That is, in the locking body that is a translational movement member, the occurrence of rattling during movement causes a rapid decrease in operability, and rattling at the end of the stroke causes the hook locking dimension to become unstable, and consequently It is necessary to effectively prevent rattling to cause a decrease in the reliability of locking.

  However, in general, a sufficient sliding surface or guide surface is necessary to prevent rattling of the translational movement member, and there is a problem that the lock device is enlarged to satisfy this.

  The present invention has been made to eliminate the above-described drawbacks, and an object of the present invention is to provide a locking device that can be downsized and has high operational reliability.

According to the present invention, the object is
Tip comprising a locking hook 1 in Rutotomoni, rear end first wing 11 and second wing piece 12 is provided to be branched, an intermediate portion pivot the locking hook 1 in a stacked orientation was facing away 6 A pair of locking bodies 2 pivotally supported around each other;
A plug 4 is inserted into the cylinder case 3 so as to be rotatable , and a terminal end is disposed at a position facing a pair of the locking bodies 2 from a rear end portion of the locking body 2 , and a terminal end of the plug 4 with respect to the plug 4 It provided integrally Te, as for the rear end of each of the locking member 2 by the rotation of the plug 4 presses one of the first wing 11 or the second wing 12 abuts against the locking member A cam projection 5 that rotates a pair of 2 in opposite directions and swings the locking body 2 between an unlocking posture in which the locking hook 1 approaches and a locking posture in which the locking hook 1 is spaced apart,
Have
The locking body 2 is formed in a plate shape and a pair thereof is stacked in the thickness direction. The locking body 2 is supported in the stacking direction by a locking body holding member 10 that is fixed to the rear end portion of the cylinder case 3 and supports the pivot 6. Then, the distal end portion protrudes from the locking body holding member 10 and can be inserted in the unlocked posture into the lock hole 8 formed of a long hole opened in the lock target, and the peripheral wall surface of the lock hole 8 in the locked posture This is achieved by providing a locking device that locks the locking hooks 1, 1 and is connected to the locking object so as not to be detached from the lock hole 8.

  The locking device includes a pair (two) of locking bodies 2 each having a locking hook 1 at the tip, and each locking body 2 is overlapped in a direction orthogonal to the protruding direction of the locking hook 1 and rotates at an intermediate portion. It is supported freely. In the connected state, the locking hook 1 is directed in the backward direction, and the rotational posture in which the locking hook 1 is close corresponds to the unlocked state, and the separated posture corresponds to the locked state.

  In order to change the locking body 2 to a locked / unlocked state, a cam projection 5 is projected from the end portion of the plug 4. When the plug 4 is rotated to rotate the cam projection 5 around the rotation center of the plug 4, the one end of the locking body 2, more precisely the opposite end to the locking hook 1 forming end is driven, and the unlocking position Rotate between.

  By connecting the two locking bodies 2 in an X-shape, each locking body 2 rotates around the pivot 6 and undergoes a state displacement. It is difficult to operate and the feeling of operation is improved. In addition, since the relative angle between the locking bodies 2 and 2 in the locking / unlocking posture is relatively easy to manage, the locking allowance of the locking hook 1 is also easy, and the reliability of locking is improved.

  As long as the cam projection 5 is rotated by a rotation operation to the plug 4, for example, even if a play angle is set between the cam 4 and the plug 4 in order to adjust the insertion / extraction position of the unlocking key with respect to the plug 4. However, when it is formed integrally with the plug 4, it is desirable to form the support surface of the locking body 2 in the locked state on an arc surface centered on the rotation center of the plug 4.

  If comprised in this way, even if there is shakiness of the rotation direction of the plug 4 in the cylinder case 3, the contact part with the cam protrusion part 5 of the locking body 2 will not move to the plug 4 radial direction. For this reason, the engagement margin of the locking hook 1 does not change, and the locking reliability is improved.

  According to the present invention, it is possible to obtain a locking device that can be downsized and has high operational reliability.

  1 and 2 show an embodiment of the present invention configured as a personal computer lock device. In this embodiment, the locking device includes a cylinder case 3 in which an inner case 3b is inserted in an outer case 3a so as not to be detached. The outer case 3a is provided with a wire attachment portion 3c, and one end of the fastening wire 7 can be connected so as not to be detached.

  Moreover, as shown in FIG.1 (c), the lock hole 8 which consists of a long hole is opened in the housing | casing 9 of the personal computer which is a lock | rock object. The vertical dimension of the lock hole 8 is such that the locking hook 1 can be inserted when the locking body 2 to be described later is in the unlocked state, and when it is in the locked state, as shown in FIG. The locking hook 1 is set so as to be locked to the periphery of the lock hole 8 on the rear surface of the housing 9. Further, the dimension in the width direction of the lock hole 8 is set so as not to rattle in the rotational direction of the inserted lock body 2.

  A plug 4 is inserted into the inner case 3b. As shown in FIG. 2, the plug 4 has a cam projection 5 protruding from the rear end, and can be relatively rotated with respect to the inner case 3b by inserting a genuine unlocking key. The cam protrusion 5 has an oval cross-sectional shape in which a side of a cylindrical body concentric with the general portion of the plug 4 is cut to form two parallel planes.

  A locking body holding member 10 that holds the locking body 2 is fixed to the rear end portion of the inner case 3b. As shown in FIG. 3, the locking body 2 is a plate-like member having a locking hook 1 formed at one end, and the other ends of the locking body 2 branch in the protruding direction of the locking body holding member 10. Wing pieces 11 and 12 are provided. The tip of the first wing piece 11 is bent in the plate thickness direction to form a stopper piece 11a, and the second wing piece 12 is further bent in the same direction to form an intermediate bent portion 12a.

The locking body 2 configured as described above has two identically shaped sheets, with the locking hooks 1 facing away from each other, stacked in the plate thickness direction, and is pivotally supported by the intermediate portion via the pivot 6. The
As shown in FIG. 2, the state in which the stopper piece 11 a of the first wing piece 11 rides on the circular arc section 5 a of the cam projection 5 corresponds to the locked state in which the locking hooks 1 of the locking body 2 are separated from each other. In the locked state, the second wing piece 12 is positioned such that the intermediate bent portion 12a is along the flat portion 5b of the cam projection 5 (see FIGS. 2B, 3D, and 3E). When the plug 4 is rotated from this state in the direction in which the flat surface portion 5b of the cam projection 5 moves away from the intermediate bent portion 12a of the second wing piece 12, that is, in the unlocking direction, eventually, FIG. ), The flat portion 5b of the cam projection 5 abuts against the second blade piece 12. Thereafter, when the plug 4 is further rotated, the second wing piece 12 is pushed by the flat portion 5 b, and the locking body 2 rotates about the pivot 6. As shown in FIG. 4, the locking body 2 is brought into an unlocked state in which the locking hook 1 approaches each other and can be inserted through the lock hole 8 by the rotation operation of the plug 4 in the unlocking direction.

  On the other hand, when the plug 4 is rotated in the locking direction from the unlocked state, the boundary between the flat surface portion 5b of the cam projection 5 and the circular arc cross-section portion 5a comes into contact with the stopper piece 11a of the first blade piece 11. Then, the first wing piece 11 is moved so as to be placed on the arcuate cross section 5a, and the state is shifted to the locked state.

  Further, a slide case 13 is attached to the tip of the inner case 3b. The slide case 13 is fitted to the inner case 3b and is fitted to the outer case 3a so as to be movable relative to both the inner case 3b and the outer case 3a. In order to determine the stroke length of the slide case 13 with respect to the inner case 3b, the pivot 6 of the lock body 2 passes through the lock body holding member 10 and the inner case 3b and is inserted into the slide case 13, A long stroke determining hole 13 a is formed in the longitudinal direction of the plug 4.

A compression spring 14 is interposed between the slide case 13 and the outer case 3a to urge the slide case 13 in the protruding direction.
Therefore, in this embodiment, in use, the plug 4 is shifted to the unlocked state using a genuine unlocking key, and the distal end portion of the locking body 2 is inserted into the lock hole 8. With the operation of inserting the distal end of the locking body 2 into the lock hole 8, the slide case 13 comes into contact with the surface wall of the housing, and then enters the outer case 3a as shown in FIG. The surface wall of the housing 9 is pressed by the elastic restoring force of the compression spring 14.

  In this state, the side wall of the locking body 2 abuts against the opposite side edge of the lock hole 8 and the backlash in the rotational direction is restricted. Then, when the plug 4 is rotated in the locking direction, the locking body 2 is engaged. The stop hooks 1 rotate in directions away from each other, and are engaged with the peripheral wall surface of the lock hole 8 as shown in FIG. When the unlocking key is removed from the plug 4 in this state, the locking device is connected to the personal computer in a non-detachable manner, and cannot be removed from the desk leg or the like to which the fastening wire 7 is connected.

  As shown in FIG. 3 (e), in the locked state, the stopper piece 11 a of the first wing piece 11 maintains the locked state in a state where it is placed on the circular arc cross-section 5 a of the cam projection 5. Since this circular arc cross-section 5a is concentric with the plug 4, even if the plug 4 is wobbled in the unlocking direction (the direction of the arrow R in FIG. 3 (e)), the first wing piece 11 swings. The corner does not change. As a result, since the locking dimension between the locking hook 1 and the lock hole 8 does not change due to the shakiness of the plug 4, the locking strength and the like are constant, and the locking reliability is increased.

  When the locking device is pulled out of the lock hole 8 in the locked state, a rotational torque in the unlocking direction is generated in the locking body 2, but the stopper piece 11a of the first wing piece 11 is supported. Since the cam projection 5 that restricts the rotation of the locking body 2 is formed in a block shape, the cam projection 5 has high strength and can increase resistance to a breaking operation.

  Furthermore, when the locking body 2 is rotated in the unlocking direction, the direction line (F) of the force applied to the cam projection 5 via the stopper piece 11a of the first wing piece 11 is substantially the rotation of the plug 4. In order to face the center, the distance (arm length) between the rotation center of the plug 4 and the action line is extremely small. For this reason, since the couple which generate | occur | produces in the plug 4 by rotational force provision to the unlocking direction to the locking body 2 becomes small, the tolerance with respect to the unauthorized rotation of the plug 4 by tumbler destruction etc. can also be improved.

  In addition, although the case where the personal computer is set as the lock target has been described above, the lock target is not limited thereto.

It is a figure which shows this invention, (a) is sectional drawing, (b) is a 1B direction arrow directional view of (a) in a locked state, (c) is a front view which shows a lock hole. 2A and 2B are cross-sectional views taken along line 2A-2A in FIG. 1A, and FIG. 2B is a cross-sectional view taken along the line 2B- in FIG. It is 2B line sectional drawing. It is a figure which shows a locking body, (a) is a front view of a locking body, (b) is a 3B direction arrow view of (a), (c) is a 3C direction arrow view of (a), (d) is locking Explanatory drawing which shows the relationship with the plug in a state, (e) is the 3E-3E sectional view taken on the line of (d), (f) is a figure corresponding to (d) which shows the middle of unlocking, (g) is (f) It is sectional drawing corresponding to (e) in the state of this. It is a figure which shows an unlocking state, (a) is sectional drawing corresponding to FIG. 2 (a), (b) is the sectional view on the 4B-4B line of FIG. 4 (a) which shows the relationship between a cam protrusion and a blade piece. It is.

Explanation of symbols

1 Locking hook 2 Locking body 3 Cylinder case 4 Plug 5 Cam protrusion

Claims (2)

Rutotomoni comprising a locking hook at the tip, rear end first wings and the second wings is branched is provided, the intermediate portion is rotatably pivot around the locking hook laminate posture is facing away A pair of locking bodies pivotally supported,
A plug that is inserted into the cylinder case so as to be rotatable , and a terminal is disposed at a position facing a pair of the locking bodies from a rear end of the locking body , and is provided integrally with the plug at the terminal of the plug ; rotation of the plug rotates the pair of opposite directions of the locking body against the rear end portion of each to push one of the first wing or second wing piece abuts locking body, A cam projection for swinging the locking body between an unlocking posture in which a locking hook is close and a locking posture in which the locking hook is separated;
Have
The locking body is formed in a plate shape and a pair thereof is stacked in the thickness direction, and is fixed to a rear end portion of the cylinder case and supported in the stacking direction by a locking body holding member that supports the pivot. The tip part protrudes from the body holding member, and can be inserted in the unlocked position into the lock hole formed of a long hole established in the lock target, and the lock hook is locked to the peripheral wall surface of the lock hole in the locked position. Then, the locking device is connected to the locking object so as not to be detached from the lock hole. The support surface for the locking body in the locked state of the cam butt portion, the lock device according to claim 1, wherein the arcuate surface of the plug and concentric.

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