JP6713355B2 - USB port lock device - Google Patents

Description

The present invention inserts an insertion case into a USB (Universal Serial Bus) port (insertion port) provided in a personal computer or the like to close the insertion case, and engages a lock claw provided in the insertion case with a slit of an outer frame of the USB port. Thus, the present invention relates to a USB port lock device that locks to prevent access to a USB port and prevent information leakage.

Today, personal computers are rapidly spreading, and a large amount of various information is recorded and stored inside the personal computer.On the other hand, in order to steal this information, unauthorized access and information leakage to the personal computer may occur. It's been a while.
Among the unauthorized access to the personal computer, a problem in recent years is information leakage due to access to the USB port. As is well known, the USB port can easily copy the data inside the personal computer by connecting an external storage device such as a USB memory. Therefore, it is necessary to take measures to prevent access to the USB port.

Therefore, to prevent access to the USB port, insert the insertion case into the USB port to close it, and lock it by engaging the lock claw provided on the insertion case with the slit on any surface of the outer frame of the USB port. Then, a USB port lock device (USB lock mechanism and release mechanism) that prevents the leakage of information is proposed in Japanese Patent Application Laid-Open No. 2004-242242.

The USB port lock device of Document 1 uses a housing (insertion case) having an opening having the same outer shape as the shape of a USB device (male terminal) used as a normal standard. The USB lock mechanism is inserted into the USB port through this opening.
A female terminal of a standard USB port has a notch (a slit is formed and a pressing spring) in a flat portion of the (outer frame), and a hole is provided in the housing so as to correspond to the place. ..
As with the current USB device (male terminal), the material of the housing may be non-ferrous metal for the insertion part and plastic for the part to be held. However, since the present invention does not require electrical connection, all non-conductive materials may be used.
Then, the USB port is closed and locked by utilizing the gap provided in the hole and the notch. That is, since the claw portion is provided so as to project from the hole and is positioned so as to mesh with the gap of the notch, when the USB lock mechanism is inserted, the claw portion completely meshes and cannot be removed.
In order to have such a structure, the claw portion is connected to the guide portion that connects the claw portion to the open end of the housing. When the USB lock mechanism is inserted, the guide portion holds the position with slight bending until the claw portion enters the gap provided in the notch, and the claw portion surely bites into the gap and meshes. .. A material of the guide portion is preferably a non-conductive material such as plastic.
Further, the holes of the USB device (male terminal) are usually provided at two places on the same plane in accordance with the cut. Therefore, the number of the claws and the number of the guides may be one, but it is preferable in terms of strength to provide two each. It is also possible to use the notch on the side surface of the USB port and install the hole and the claw portion correspondingly.
In this way, the claw portion and the USB port are completely engaged and cannot be removed. If you try to forcefully remove it, the USB port and USB lock mechanism will be damaged. As a result, it is possible to lock the port without using any software or the like.
Also, the USB lock mechanism of the present invention is provided with a lock release receiving portion which is connected to the guide portion and receives the lock releasing member. This is for receiving the lock release member and removing the claw portion from the gap of the notch, as shown below.
Therefore, when the claw portion and the guide portion are provided at two locations corresponding to the two notches on the plane of the USB port, the unlock receiving portion is a plate-like shape that connects between the two guide portions and has an opening. It is preferred that they are arranged obliquely towards the end without.
The claw portion, the guide portion, and the lock release receiving portion may use the notches on the side surfaces as described above, or may not be provided at two places. For example, using two notches on opposite sides, two holes, claws, and guides are provided, and the two guides are connected and connected to each other to provide a lock release receiving portion for receiving a lock release member. Can be done.
Further, the lock release receiving portion may be made of a hard material or an elastic material as long as it can receive the lock releasing member and remove the claw portion, and its shape can be appropriately changed according to the shape of the lock releasing member.
Further, the housing is provided with a thin film serving as an entrance of the lock releasing member and a cavity toward the lock receiving portion on an end surface of the housing having no opening.
That is, in order to release the lock once locked, the user breaks the thin film through the lock release member and pushes the lock release member against the lock release receiving portion to push down or push out the guide portion. Move it, remove the claw from the notch, and then unlock it.
Therefore, the thin film may be of a strength and a material that can be broken by a person pushing the lock releasing member with an appropriate force. For example, thin plastic.
That is, in order to release the lock, the thin film must be broken, and the history of the removal remains at a glance. In this way, it is possible to easily recognize at a glance whether or not there is unauthorized access, without using any software. If individual recognition information such as a serial number is attached to the chassis, it can be easily recognized whether or not another chassis is worn after removing.
Further, the lock release mechanism provided separately from the lock mechanism includes a rod-shaped or plate-shaped member that fits into the opening.
Further, it is preferable to have a releasing recess provided so as to mesh with the lock receiving portion when the thin film is torn and inserted and the claw is removed while pushing down the guide. Thus, the unlocking recess can be hooked on the unlocking receiving portion, and the locking mechanism can be pulled out most safely and easily.
With the above configuration, no software is required, access to the USB port itself can be prevented, information leakage can be prevented, and safe removal is possible, but a history of unauthorized access can be recorded. It became possible to recognize.

Utility Model Registration No. 3135047 (Paragraph 0009-Paragraph 0018, FIGS. 5 to 7)

However, in the above-mentioned conventional USB port lock device (lock mechanism and release mechanism), a thin film serving as an entrance of the lock release member and a cavity toward the lock release receiving portion are provided on the end surface of the housing, and the thin film has a rod shape or a plate shape. The lock release member consisting of a member is pierced through the thin film on the end face into the cavity, and is further pushed, and the lock release member is applied to the lock release receiving part to push down or push away the guide part to move the claw part (outside Since the lock is released by removing it from the notch (slit) of the frame plane part, even without using the unlocking member itself, it can be inserted into the rod material or plate material similar to this unlocking member, that is, the cavity of the housing. There is a problem that the lock may be released as long as it can be operated by pushing the guide portion against the lock release receiving portion, and thus reliable security is not obtained.

The present invention solves such a conventional problem, and in this type of USB port lock device, it is difficult to unlock the USB port after blocking and locking the USB port, thereby realizing highly reliable security. ,With the goal.

In order to achieve the above object, the USB port lock device of the present invention comprises:
Insert the insertion case into the USB port to close it, and lock it by engaging the lock claw provided on the insertion case with the slit on one surface of the outer frame of the USB port to prevent access to the USB port and In the USB port lock device to prevent leakage,
A substantially cylindrical cover case having openings at both ends,
An outer cylinder having openings at both ends, arranged and fixed in the cover case, a lock release portion having a wedge-shaped tip at one end, and a keyhole at the other end side An inner cylinder movably fitted in the outer cylinder in the axial direction, a plurality of pin holes are provided between the outer cylinder and the inner cylinder, and each pin hole of the outer cylinder is movably arranged and a spring. A plurality of lock pins that are urged and biased toward the inner cylinder by a member and a plurality of driver pins that are movably arranged in the pin holes of the inner cylinder and that are elastically pressed against the lock pins of the outer cylinder. It has a lock state as a normal state, and is unlocked by inserting a dedicated key into the keyhole, and the inner cylinder can be moved in the outer cylinder toward one end of the outer cylinder. Cylinder lock,
A spring that is arranged in the cylinder lock and normally presses and urges the inner cylinder toward the other end side of the outer cylinder to hold the lock release portion of the inner cylinder in the one end opening of the outer cylinder. Members,
It has openings at both ends, has a hole on the peripheral surface facing the slit on one surface of the outer frame of the USB port, and has a substantially cylindrical shape that can be inserted into the USB port. insert case the substantially cylindrical in shape unlocking portion of the inner cylinder protrudes from the coupled has been the one end opening forward and backward to the outside of said cover case, and the substantially cylindrical shape within the bore of the insertion case A wide plate having a locking claw extending from one end side to a position of the hole along the surface having, and protruding from the hole to the outside of the insertion case at the position of the hole, and from the other end of the wide plate. The other end of the insertion case extends to a predetermined position, and is composed of a leaf spring including a narrow plate having an inclined surface at an end thereof capable of contacting a wedge shape of a tip of the lock releasing portion of the inner cylinder, Arranged along the surface having the hole in the substantially tubular shape of the insertion case , one end of the wide plate is supported on one end side of the insertion case , and the inclined surface of the narrow plate end is in contact along the wedge shape before Symbol unlocking tip, a locking member the locking claw of the wide plate is protruded from the hole of the insertion case,
Equipped with
By inserting the insertion case into the USB port, the USB port is closed by the insertion case, the engagement between the locking pawl this condition is protruded from the hole of the insertion case the slit of the outer frame of the USB port Locked by the cylinder lock in a locked state as a normal state,
When pulling out the insertion case from the USB port, the cylinder lock is unlocked by inserting the dedicated key into the key hole of the cylinder lock, and in the unlocked state, the inner cylinder is locked to the spring member. By pushing the lock release portion toward the insertion case side against the biasing force, the lock release portion is pushed into the insertion case, and the lock release member pushes the lock member in the direction in which the lock claw is separated from the slit of the USB port. Press and displace to release the lock,
That is the summary.
The USB port locking device, the cover case, the outer tube and the inner tube is formed into a flat rectangular tube shape, respectively, have preferred that the entirety of which is formed in the rectangular flat.

According to the USB port lock device of the present invention, with the above-described configuration, by inserting the insertion case into the USB port, the USB port is closed by the insertion case, and this state is set from the slit of the outer frame of the USB port and the hole of the insertion case. It locks by the engagement with the protruding lock claw, and holds this locked state by the locked cylinder lock as a normal state, making it difficult to unlock the USB port after locking and locking it, and highly reliable security When pulling out the insertion case from the USB port, the cylinder lock is unlocked by inserting the dedicated key into the key hole of the cylinder lock, and in this unlocked state, the inner cylinder is set to the spring member. By pushing the lock release portion into the insertion case against the biasing force of the lock release portion, the lock release portion is pushed into the insertion case, and the lock release portion pushes and displaces the lock member in the direction in which the lock claw is separated from the slit of the USB port. Since the lock is released, there is a special effect unique to the present invention that only the key administrator can easily unlock the USB port.

The figure which shows the structure of a general USB port ((a) is a side view (b) is a front view) The figure which shows the structure of the USB port lock device in one embodiment of this invention ((a) is side sectional drawing, (b) is rear sectional view) The figure which shows the usage example (state which locks a USB port with a USB port lock device) of the same USB port lock device ((a) is a plane sectional view, (b) is a side sectional view) The figure which shows the usage example (state which unlocks the USB port by the USB port lock device) of the same USB port lock device ((a) is side sectional drawing, (b) is plane sectional view, (c) is side sectional view)

Next, a mode for carrying out the present invention will be described with reference to the drawings.
FIG. 1 shows a general USB port, and FIG. 2 shows a USB port lock device.

Here, first, the USB port will be described.
As shown in FIG. 1, the USB port P includes a metal outer frame 91 having a flat, substantially rectangular tube shape, a plastic electrode supporting member 94 disposed in the outer frame 91, and the electrode supporting member. And a plurality of electrodes (not shown) arranged at 94. In particular, the outer frame 91 is made of spring steel or the like, and is formed into a generally rectangular tubular shape having a flat shape so that the insertion port 90 is wide in the length direction and narrow in the width direction. A pressing spring 93 for pressing the USB terminal (male) inserted into the USB port P is provided on each surface of the outer frame 91 so as to project inward. In this case, two substantially U-shaped slits 92 are formed in parallel on the two large surfaces, and two substantially triangular pressing springs 93 are arranged in parallel, and one substantially U-shaped slit 92 is formed on the small surface. As a result, one substantially triangular pressing spring 93 is arranged. Each of the presser springs 93 is curved or bent inward as a whole, and its tip is curved or bent outwardly to ensure the USB terminal (male) inserted into the USB port P. The presser is held and the USB terminal can be easily inserted into and removed from the USB port P.

The USB port lock device will be described below.
As shown in FIG. 2, the USB port lock device L is provided in the insertion case 7 by inserting the insertion case 7 into the above-mentioned USB port P to close the insertion case 7 and the slit 92 on one surface of the outer frame 91 of the USB port P. The lock claw 811 is locked by engaging the lock claw 811 to prevent access to the USB port P to prevent information leakage. Particularly, in the USB port lock device L, the cover case 1 and the cylinder lock 2 are provided. A spring member 6, an insertion case 7 and a lock member 8.
Further, in this USB port lock device L, one surface 91 s of the outer frame 91 facing the surface of the outer frame 91 of the USB port P, in this case, the surface of the electrode supporting member 94 on which the electrodes are arranged (hereinafter, referred to as outer frame 91 Two lock claws 811 are provided in the insertion case corresponding to the two slits 92 arranged in parallel on the left side surface 91 s), and the two lock claws 811 are engaged with the two slits 92 to lock them. There is.

The cover case 1 is formed in a substantially tubular shape having openings 10 at both ends. In this case, the cover case 1 is made of polypropylene in the shape of a flat rectangular tube, more specifically, in the shape of a flat, substantially quadrangular cylinder whose entire length is vertically long, and the openings 10 at both ends are arranged in the longitudinal direction. It has a vertically long flat square that is wide in the (vertical direction) and narrow in the width direction (horizontal direction). Further, in this case, the opening 10 at one end is formed with the flange 11 having a predetermined width all around, and the opening area is slightly smaller than the opening 10 at the other end.

The cylinder lock 2 has openings 31 and 32 at both ends, an outer cylinder 3 arranged and fixed in the cover case 1, a lock release portion 41 having a wedge-shaped tip at one end, and the other end side. An inner cylinder 4 having a key hole 40 and fitted in the outer cylinder 3 so as to be movable in the axial direction of the outer cylinder 3, and a plurality of pin holes 33, 43 are provided between the outer cylinder 3 and the inner cylinder 4. And is movably arranged in each pin hole 33 of the outer cylinder 3 and is movable to each of the plurality of lock pins 35 and each pin hole 43 of the inner cylinder 4 which are biased by the spring member 34 toward the inner cylinder 4 side. It has a plurality of driver pins 45 that are arranged and elastically pressed against each lock pin 35 of the outer cylinder 3. As a normal state, in a locked state, a dedicated key 5 (see FIG. 4) is provided in the key hole 40. It is unlocked by inserting the inner cylinder 4 into the outer cylinder 3 so as to be movable toward one end of the outer cylinder 3.
The outer cylinder 3 can be fitted into the cover case 1 by a zinc alloy die casting, has a length substantially the same as the axial length in the cover case 1, and is slightly smaller than the hollow cross section in the cover case 1. Is formed into a flat rectangular tube shape having openings 31 and 32 at both ends, in this case, a flat and substantially square tube shape. Further, the hollow portion 36 between the both end openings 31 and 32 of the outer cylinder 3 is connected to the one end side hollow portion 361 of a vertically long rectangular shape having a short axial length and a large hollow cross section, and the one end side hollow portion 361. A vertically long rectangular intermediate hollow portion 362 having an axial length longer than that of the hollow portion 361 on one end side, an upper portion having a thickness slightly larger than that of the hollow portion 361 at one end, and a hollow cross section slightly smaller than the hollow portion 361 at one end side. , The length in the axial direction connected to the intermediate hollow portion 362 is slightly longer than the combined length of the one end side hollow portion 361 and the intermediate hollow portion 362, the upper portion is thicker than the intermediate hollow portion 362, and the hollow cross section has the intermediate hollow portion. The other end side hollow portion 363 of a vertically long rectangle smaller than 362 is formed. In this way, due to the difference in the thickness of the upper portions of the hollow portions 361, 362, 363 on the one end side, the middle portion, and the other end side, the hollow space between the upper portion of the one end side hollow portion 361 and the upper portion of the intermediate hollow portion 362 is reduced. Step portions 364 and 365 are respectively formed between the portion 362 and the intermediate portion 363 on the other end side, and the hollow portion 363 on the other end side is eccentric to the axial center of the outer cylinder 3, In this case, it is formed at a position slightly eccentric to the shaft center. The pin holes 33 are formed at the upper part of the thickest other end side hollow portion 363 of the outer cylinder 3 at four locations in the axial direction and penetrating between the outer peripheral surface and the inner peripheral surface at right angles to the axial direction. .. A lock pin 35 having a bottomed cylindrical shape is movably attached to each of the pin holes 33 of the inner cylinder 4 via a coil spring as a spring member 34. Further, mounting holes 37 for connecting and fixing an insertion case 7 to be described later are formed in one end of each of the left and right side surfaces of the outer cylinder 3 and in each of the upper and lower sides thereof.
The inner cylinder 4 is insertable into the hollow portion 36 in the outer cylinder 3 by a zinc alloy die casting, has the same length as the length of the hollow portion 36 of the outer cylinder 3, and is larger than the hollow cross section of the other end side hollow portion 363. It is formed in a flat rectangular tube shape having openings 401 and 402 at both ends, which is slightly smaller in size, in this case, a flat, substantially square tube shape. Further, one end side of the inner cylinder 4 is formed by cutting out a substantially lower half portion by a predetermined length, and a tip end side (one end surface) of an upper half portion of the one end side is formed in a wedge shape. An unlocking portion 41 is provided at one end. In this case, the wedge shape of the tip of the unlocking portion 41 has an angle of a predetermined angle from the front end (one end) of one side surface (right side surface) of the unlocking portion 41 to the front-rear intermediate portion of the other side surface (left side surface). (In a plan view right-angled triangular shape) (see FIG. 3A). In the hollow portion between the openings 401 and 402 at both ends of the inner cylinder 4, the lower half portion side is formed in a convex shape in section from the lock releasing portion 41 at one end to the other end to form the key hole 40. Corresponding to the pin holes 33 of the outer cylinder 3, the pin holes 43 are located at four positions on the other end of the inner cylinder 4 in the axial direction, the outer peripheral surface and the inner peripheral surface (key hole) perpendicular to the axial direction. ) Is formed so as to penetrate therethrough. Driver pins 45 having the same diameter and different lengths are arranged in the pin holes 43 so as to be vertically movable, and are elastically pressed by the lock pins 35 of the outer cylinder 3. Further, a receiving portion 47 for the coil spring is formed on the upper portion of the inner cylinder 4 at the rear portion of the unlocking portion 41, the receiving portion 47 having a U-shaped rising portion with the unlocking portion 41 side, that is, the front portion opened. It The inner cylinder 4 is inserted into the hollow portion 36 of the outer cylinder 3 so that the receiving portion 47 is arranged above the intermediate hollow portion 362 of the outer cylinder 3 (the rear portion of the receiving portion 47) and the intermediate hollow portion 362. The lock release portion 41 at one end is engaged with the stepped portion 365 between the hollow portion 363 on the other end side and is incorporated in the outer cylinder 3 so as to be movable in the axial direction of the outer cylinder 3 so that the lock release portion 41 can be retracted from one end of the outer cylinder 3. Be done.
The key 5 is made of brass and comprises a blade 51 and a head 52, and naturally the irregular shape of the edge of the blade 51 matches the key code of the cylinder lock 2. In this case, since the cylinder lock 2 is composed of four code pins having different lengths and four steps, it is possible to make 256 different key differences by the fourth power of 4.
Further, the key 5 has an uneven base portion of the blade 51, and when the key 5 is inserted into the key hole 40 of the cylinder lock 2, the other end surface of the inner cylinder 4 has an upper edge portion of the key hole 40 (opening 402). A convex engaging portion 53 having a height capable of only being in contact with the inner cylinder 4 and a length required to move the inner cylinder 4 within the outer cylinder 3 by a predetermined distance is also formed.
The cylinder lock 2 has such a configuration, and an insertion case 7 to be described later is attached to one end of the cylinder lock 2 and is integrated into the cover case 1.

The spring member 6 is arranged in the cylinder lock 2, and normally presses and urges the inner cylinder 4 toward the other end side of the outer cylinder 3 to open the unlocking portion 41 of the inner cylinder 4 at one end of the outer cylinder 3. Hold the work clamp within 31. In this case, a coil spring is adopted as the spring member 6, the coil spring 6 is axially arranged in the receiving portion 47 of the upper portion of the inner cylinder 4 of the cylinder lock 2, and is pressed and compressed by the insertion case 7 described later, The inner cylinder 4 is pressed and urged toward the other end side of the outer cylinder 3, and the rear portion of the receiving portion 47 at the upper part of the inner cylinder 4 is made into a step portion 365 between the intermediate hollow portion 362 and the other end side hollow portion 363. The lock release portion 41 of the inner cylinder 4 is pressed and held in the one end opening 31 of the outer cylinder 3 by pressure contact.

The insertion case 7 has openings 71 and 72 at both ends, has a hole 73 on the peripheral surface facing the slit 92 on one surface of the outer frame 91 of the USB port P, and is a substantially cylindrical member that can be inserted into the USB port P. The unlocking portion 41 of the inner cylinder 4 is connected to the one end opening 10 of the cover case 1 in the tubular shape of the insertion case 7 so as to be able to move back and forth, and is projected from the one end opening 10 to the outside of the cover case 1. It In this case, the insertion case 7 is formed of a steel plate in the shape of an outer frame of a connector of a generally used USB device (male terminal), which is a flat rectangular tube shape, and has an opening 71 at one end that is long in the vertical direction. The opening 72 at the other end has a square shape approximately the same as the cross-sectional shape of the lock releasing portion 41 so that the lock releasing portion 41 of the inner cylinder 4 can be inserted at the center of the other end in the vertical direction. The upper and lower sides of the opening 72 at the other end are plates, and when the insertion case 7 is connected to the opening 10 at one end of the cover plate 1, the spring member 6 is pressed by the upper plate. On the right side surface corresponding to the left side surface 91s of the outer frame 91 of the USB port P of the insertion case 7, there are two holes 73 corresponding to the respective slits 92 on the left side surface of the outer frame 91 (in particular, the central portion of the slit 92). Is formed. Each hole 73 is formed in a quadrangle. A fixing portion 74 for fixing a lock member 8 to be described later is formed at one end of the right side surface of the insertion case 7, and the insertion case 7 is provided in one end opening of the cover case 1 at the other end sides of the left and right side surfaces. A mounting hole 75 for connecting and fixing to is formed. In this case, the fixing portion 74 is composed of a pair of U-shaped projecting pieces 741. The projecting pieces 741 are symmetrically formed on the upper and lower sides of the one edge of the right side surface of the insertion case 7 with the center in the width direction as the center of symmetry. Each of them is folded inward into a substantially U-shape. Further, the mounting holes 75 are formed symmetrically on the other ends of the left and right side surfaces of the insertion case 7 on the upper and lower sides with the center in the width direction as the symmetrical center.
The lock member 8 is arranged along the right side surface having the hole 73 in the tubular shape of the insertion case 7, one end is supported by one end side of the insertion case 7, and the other end is the right side surface having the hole 73. From a leaf spring having a lock claw 811 that extends obliquely along the wedge shape of the tip of the lock release portion 41 in the opposite left side direction, protrudes from the hole 73 in the middle, and can be locked in the slit 92 of the USB port P. Become. In this case, the lock member 8 is made of a stainless steel plate and extends from one end to the position of each hole 73 along the right side surface in the tubular shape of the insertion case 7, and at each position of the hole 73 from each hole 73 to the outside of the insertion case 7. A wide rectangular plate 81 having two lock claws 811 protruding to the end, and the other end of the insertion case 7 extending from a space between the lock claws 811 of the square plate 81 to a predetermined position, and the end of the lock releasing part 41 at the end. A narrow rectangular plate 82 having an inclined surface 821 capable of abutting in a wedge shape. In this lock member 8, one end of a wide rectangular plate 81 is inserted into a fixing portion 74 at one end of the right side surface of the insertion case 7, that is, a pair of U-shaped projecting pieces 741 and caulked and fixed, and two lock claws 811 are provided. Is projected to the outside from each hole 73 on the right side surface of the insertion case 7, and the inclined surface 821 at the other end is obliquely extended from the right side surface to the left side surface at the other end side of the insertion case 7.
The other end of the insertion case 7 is arranged in one end opening 31 of the outer cylinder 3 of the cylinder lock 2, and a pin 77 is provided between each mounting hole 37 at one end of the outer cylinder 3 and each mounting hole 75 at one end of the insertion case 7. Both ends of the inserted pin 77 are crimped and connected to one end of the outer cylinder 3. In the insertion case 7, the lock release portion 41 is contacted with the other end inclined surface 821 of the lock member. , Which can be moved forward and backward. Then, the cylinder lock 2 to which the insertion case 7 is coupled in this way is integrally incorporated in the cover case 1, and the insertion case 7 is projected from the one end opening 10 of the cover case 1.

In this way, in this USB port lock device L, by inserting the insertion case 7 into the USB port P, the USB port P is closed by the insertion case 7, and this state is the same as the slits 92 of the outer frame 91 of the USB port P. It is locked by engagement with each lock claw 811 protruding from each hole 73 of the insertion case 7, and this locked state is normally held by the cylinder lock 2 in the locked state. When removing the insertion case 7 from the USB port P, the cylinder lock 2 is unlocked by inserting the dedicated key 5 into the key hole 40 of the cylinder lock 2, and from this unlocked state, the inner cylinder 4 is removed. By pushing the spring member 6 toward the insertion case 7 side against the biasing force of the spring member 6, the lock release portion 41 is pushed in the insertion case 7, and the inclined surface 821 of the lock member 8 is pushed by the lock release portion 41. 811 is pressed and displaced in a direction away from each slit 92 of the USB port P to release the lock.

3 and 4 show examples of use of this USB port lock device L.
To lock the USB port P with the USB port lock device L, as shown in FIG. 3, hold the cover case 1 of the USB port lock device L by hand and insert the insertion case 7 into the USB port P. Of course, by inserting the insertion case 7 into the USB port P, the USB port P is closed by the insertion case 7, and this state is inserted into the two slits 92 (the central portion of the slit 92) of the outer frame 91 of the USB port P. Two lock claws 811 protruding from the two holes 73 of 7 are locked (locked), and the locked state of these lock claws 811 is normally held by the cylinder lock 2 in the locked state. That is, the engagement of the four lock pins 35 of the outer cylinder 3 with the four pin holes 43 of the inner cylinder 4 restricts the movement of the inner cylinder 4 in the outer cylinder 3 in the axial direction toward the insertion case 7. Since the lock member 8 (the inclined surface 821 of the lock member 8) cannot be pushed by the unlocking portion 41 of the inner cylinder 4, the engagement state of each slit 92 and each lock claw 811 is maintained.
When the USB port P is unlocked, the cylinder lock 2 is unlocked by inserting the dedicated key 5 into the key hole 40 of the cylinder lock 2 of the USB port lock device L as shown in FIG. To do. That is, by inserting the dedicated key 5, each driver pin 45 of each pin hole 43 of the inner cylinder 4 is pushed up according to the uneven shape of the blade 51 of the key 5, and each pin hole of the outer cylinder 3 and the inner cylinder 4 is pushed. The inner cylinder 4 is inserted into the outer cylinder 3 when the boundary surface between the lock pin 35 and the driver pin 45 arranged on the outer surfaces 33 and 43 is aligned with the share line of the boundary between the outer cylinder 3 and the inner cylinder 4. Then, by pushing the key 5, the convex engaging portion 53 of the key 5 pushes the upper edge portion of the key hole 40 of the inner cylinder 4 to move inside the outer cylinder 3. When the inner cylinder 4 is pushed toward the insertion case 7, the inner cylinder 41 moves toward the insertion case 7 in the outer cylinder 3, and the lock release part 4 at one end of the inner cylinder 4 is pushed in the insertion case 7. While pushing up the inclined surface 821 of the lock member 8, the lock member 8 enters between the lock member 8 and the right side surface of the insertion case 7, and the entire lock member 8 tilts toward the left side surface of the insertion case 7. As a result, the lock claws 811 are removed from the slits 92 of the USB port P and are retracted into the insertion case 7 through the holes 73 on the right side surface of the insertion case 7, so that the lock claws 811 and the slits 92 are engaged with each other. It will be canceled. When the USB port lock device L is pulled out from the USB port P while holding the portion of the cover case 1 in the unlocked state of the lock claw 811, the USB port P is unlocked.

As described above, according to the USB port lock device L, by inserting the insertion case 7 into the USB port P, the USB port P is closed by the insertion case 7, and this state is set to the outer frame 91 of the USB port P. The slits 92 and the locking claws 811 projecting from the holes 73 of the insertion case 7 are engaged with each other to lock, and the locked state is held by the cylinder lock 2 in the locked state, so that the USB port P is closed. , It is difficult to unlock after locking, and reliable security can be realized. When removing the insertion case 7 from the USB port P, the cylinder lock 2 is unlocked by inserting the dedicated key 5 into the key hole 40 of the cylinder lock 2, and the inner cylinder 4 is unlocked in this unlocked state. By pushing the spring member 6 toward the insertion case 7 side against the biasing force of the spring member 6, the lock release portion 41 is pushed into the insertion case 7, and the lock member 8 is locked by the lock claws 811 by the USB port P. Since the lock is released by pressing and displacing the slit 92 in a direction away from each slit 92, only the administrator of the key 5 can easily unlock the USB port P.
Further, in this USB port lock device L, the cylinder lock 2 is not unlocked by inserting the key 5 into the key hole 40 of the inner cylinder 4, and the inner cylinder 4 in the outer cylinder 3 is rotated by the key 5. Since the cover case 1, the outer cylinder 3, and the inner cylinder 4 are formed in a flat rectangular tube shape by pushing in the axial direction, and the entire apparatus is formed in a flat rectangular shape, the entire apparatus is made as thin as possible. Even if two or more USB ports P are provided in parallel on the back or side of the main body of the personal computer, it is possible to lock the two USB ports P with the two USB port lock devices L. It is also possible to lock only one USB port P with one USB port lock device L so as not to interfere with the use of the other USB port P.
Further, in this USB port lock device L, the cylinder lock 2 is composed of four code pins of different lengths and four steps, so that it is possible to make 256 different key differences by 4 to the fourth power. It is possible to realize highly reliable security.

In this USB port lock device L, two lock claws 811 are provided in the insertion case 7 corresponding to the two slits 92 arranged in parallel on one surface of the outer frame 91 of the USB port P, and the two slits 92 are provided. The two lock claws 811 are engaged and locked, but one lock claw is provided in the insertion case corresponding to one slit arranged on one surface of the outer frame of the USB port. Alternatively, one lock claw may be engaged to lock. Even in this case, substantially the same action and effect can be obtained.
Further, in this USB port lock device L, the number of key differences is 256, but it is possible to increase the number of pin arrangements by 4 each time the number of pin arrangements is increased, and by increasing the number of pin arrangements, reliability is further increased. It is possible to realize high security.

L USB port lock device 1 cover case 10 opening 11 flange 2 cylinder lock 3 outer cylinder 31 opening 32 opening 33 pin hole 34 spring member (coil spring)
35 lock pin 36 hollow part 361 one end side hollow part 362 intermediate hollow part 363 other end side hollow part 364 step part 365 step part 37 mounting hole 4 inner cylinder 401 opening 402 opening 40 key hole 41 lock release part 43 pin hole 45 driver pin 46 hollow part 47 receiving part 5 key 51 blade 52 head 53 convex engaging part 6 spring member (coil spring)
7 Inserting Case 71 Opening 72 Opening 73 Hole 74 Fixing Part 741 Projecting Piece 75 Mounting Hole 77 Pin 8 Locking Member 81 Wide Square Plate 811 Locking Claw 82 Narrow Square Plate 821 Slope P USB Port 90 Inserting Port 91 Outer Frame 91s Left side surface of outer frame 92 Slit 93 Presser spring 94 Electrode support member

Claims (2)

Insert the insertion case into the USB port to close it, and lock it by engaging the lock claw provided on the insertion case with the slit on one surface of the outer frame of the USB port to prevent access to the USB port and In the USB port lock device to prevent leakage,
A substantially cylindrical cover case having openings at both ends,
An outer cylinder having openings at both ends, arranged and fixed in the cover case, a lock release portion having a wedge-shaped tip at one end, and a keyhole at the other end side An inner cylinder movably fitted in the outer cylinder in the axial direction, a plurality of pin holes are provided between the outer cylinder and the inner cylinder, and each pin hole of the outer cylinder is movably arranged and a spring. A plurality of lock pins that are urged and biased toward the inner cylinder by a member and a plurality of driver pins that are movably arranged in the pin holes of the inner cylinder and that are elastically pressed against the lock pins of the outer cylinder. It has a lock state as a normal state, and is unlocked by inserting a dedicated key into the keyhole, and the inner cylinder can be moved in the outer cylinder toward one end of the outer cylinder. Cylinder lock,
A spring that is arranged in the cylinder lock and normally presses and urges the inner cylinder toward the other end side of the outer cylinder to hold the lock release portion of the inner cylinder in the one end opening of the outer cylinder. Members,
It has openings at both ends, has a hole on the peripheral surface facing the slit on one surface of the outer frame of the USB port, and has a substantially cylindrical shape that can be inserted into the USB port. insert case the substantially cylindrical in shape unlocking portion of the inner cylinder protrudes from the coupled has been the one end opening forward and backward to the outside of said cover case, and the substantially cylindrical shape within the bore of the insertion case A wide plate having a locking claw extending from one end side to a position of the hole along the surface having, and protruding from the hole to the outside of the insertion case at the position of the hole, and from the other end of the wide plate. The other end of the insertion case extends to a predetermined position, and is composed of a leaf spring including a narrow plate having an inclined surface at an end thereof capable of contacting a wedge shape of a tip of the lock releasing portion of the inner cylinder, Arranged along the surface having the hole in the substantially tubular shape of the insertion case , one end of the wide plate is supported on one end side of the insertion case , and the inclined surface of the narrow plate end is in contact along the wedge shape before Symbol unlocking tip, a locking member the locking claw of the wide plate is protruded from the hole of the insertion case,
Equipped with
By inserting the insertion case into the USB port, the USB port is closed by the insertion case, the engagement between the locking pawl this condition is protruded from the hole of the insertion case the slit of the outer frame of the USB port Locked by the cylinder lock in a locked state as a normal state,
When pulling out the insertion case from the USB port, the cylinder lock is unlocked by inserting the dedicated key into the key hole of the cylinder lock, and in the unlocked state, the inner cylinder is locked to the spring member. By pushing the lock release portion toward the insertion case side against the biasing force, the lock release portion is pushed into the insertion case, and the lock release member pushes the lock member in the direction in which the lock claw is separated from the slit of the USB port. Press and displace to release the lock,
A USB port lock device characterized by the above. The USB port lock device according to claim 1, wherein the cover case, the outer cylinder, and the inner cylinder are each formed in a flat rectangular tube shape, and are formed in a flat rectangular shape as a whole.

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