JP2001082013A - Case storing record medium, security lock device for the case, case storing record medium having security lock device, and exhibition method using the case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exhibition method utilizing the security lock device for a case simple in structure and convenient of use the case provided with the security lock device, and the case as it is, as a case for exhibition. SOLUTION: By pushing a lock member 30 in a lock case 10, claw pieces 45 elastical brought into contact with the upper face of lock pieces 14 inside the lock case 10 are moved to the lower part of the lock pieces 14 to engage with them, and a stopper piece 41 is inserted into the engaging hole 17 of the lock case 10 to be locked. When it is made in an unlock condition, by inserting a first key piece of a key in a specific key hole of the lock member 30, a second key piece in the other key hole, the first key piece on the head moves a slide piece 50 to conform the other key hole to the position of a through hole of the slide piece 50, and the second key piece presses the part giving spring resiliency of the claw piece 45 to release the engaged condition. Next by pulling out the key, the lock member 30 is lifted, the second key piece is moved upward in the condition releasing engagement of the claw piece 45, the extreme end part of the key piece is separated from the part given spring resiliency by the claw pirece 45, and simultaneously, the claw piece 45 is constituted so as to elastical come into contact with the upper face of the lock piece again.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a case for accommodating a recording medium such as a compact disk on which music and video are recorded, a security lock device for the case, a case for accommodating a recording medium provided with the security lock device, and the case. About the exhibition method.

[0002]

2. Description of the Related Art Disc-shaped recording media, such as compact discs (CD) and digital video discs (DVD), on which music and video are recorded, are sold in a case with a door. Hereinafter, in this specification, "recording medium"
Means a disc-shaped recording medium such as a CD or DVD. Therefore, in the rental shop, the recording medium is taken out of the sales case, stored in a storage shelf in the counter, empty sales cases are arranged on the shelf for display, and when the recording medium is lent out, for example, `` rented '' The tag is attached to a sales case with a rubber band and displayed again. In addition, the recording medium taken out of the sales case is sometimes replaced with another exhibition / rental case and presented for display. In this case, the original sales case is discarded as unnecessary. In addition, in a rental shop, in order to prevent unauthorized removal of the recording medium, the sales case containing the recording medium is displayed in a security case equipped with a lock. However, a security system that detects a detection element attached to a security case at the exit of a shop and sounds an alarm buzzer is adopted. As an example of such a security case, Japanese Unexamined Patent Publication No. 9-290856 discloses a lock body provided with a keyhole at a side of a case body having an insertion opening at a front end face for inserting and removing a sales case containing a recording medium. A structure is disclosed in which the latch is locked to the case body when the lock body is pushed in, and the lock piece is projected from the insertion opening so that the internal sales case cannot be taken out.

[0003]

When a recording medium is taken out of a sales case that has been shipped from a conventional manufacturing and sales company and empty cases are arranged on a shelf for display, the recording medium is illegally used. Although it is possible to avoid being taken out, it is necessary to install a storage shelf for storing the recording medium, and it is troublesome to manage the recording medium. If the recording medium is replaced with a display / rental case and presented for display, the rental shop must purchase a new rental case, and the original sales case is wasted and must be disposed of as garbage. . In the case of the security case, since the lock can be easily opened by intentionally inserting a nail or the like into the keyhole, there is a risk that the internal recording medium may be illegally taken out. If not, a large number of security cases must be purchased at the rental shop, resulting in a disadvantage that the cost is extremely high. In addition, the security lock device is not retrofitted to the exhibition / rental case, and the security lock device is not retrofitted to the sales case shipped from the manufacturing and sales company, and the case is not used as it is for display. .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a security lock device having a simple structure and an easy-to-use case, a case provided with the security lock device, and a display method using the case as it is as a display case.

[0005]

According to a first aspect of the present invention, there is provided a security lock device for a case for accommodating a recording medium, wherein a plurality of keyholes are disposed substantially on a straight line and the keyholes are orthogonal to the keyholes. A lock member slidably provided with a sliding piece having a through hole corresponding to each keyhole formed in a base provided with a groove in the longitudinal direction, and a lock member provided in an opening formed on one side surface in the longitudinal direction. The lock member is provided so as to be able to protrude and retract from the opening by a predetermined stroke, and a recording medium such as a compact disc is stored in the case main body, and the door is freely opened and closed. A lock case provided to fit a fixing piece formed on the other side surface opposite to the one side surface into an engagement groove provided along the lock groove, and the lock case is provided on the lock member. When pushed into And a stopper piece inserted into an engagement hole formed in the fixed piece of the lock case, and a claw piece having a spring resilience engaged with the locking piece formed on the other side are integrally formed. The sliding piece is moved when inserted into a specific keyhole to match the position of the other keyhole and the through hole, and when the sliding piece is pulled out, the sliding piece is moved back to the original position and the other sliding hole is moved to another position. A key provided with a first key piece that functions to make the position of the key hole and the through hole inconsistent, and a second key piece that is inserted into another key hole and releases the engagement state of the claw piece. It is characterized by the following.

According to a second aspect of the present invention, there is provided a security lock device for a case for storing a recording medium according to the first aspect of the present invention, which communicates with a dummy keyhole provided in addition to the keyhole. A dummy hole is provided in the sliding piece,
A window hole communicating with the groove accommodating the sliding piece is provided in the lock member, and when an illegal foreign object is inserted into the dummy hole, the sliding piece moves and one of the sliding pieces moves into the window hole. It is characterized in that it is configured to represent a part.

In order to achieve the same object, a case for storing a recording medium provided with a security lock device according to claim 3 is
A square case in which a door is openably and closably provided on a case main body for storing a recording medium such as a compact disk and an engagement groove is formed along a free end side of the door, and a plurality of keyholes arranged substantially linearly And a lock member slidably provided with a sliding piece having a through hole corresponding to each keyhole formed on a base provided with a groove orthogonal to the keyhole in the longitudinal direction, and formed on one side surface in the longitudinal direction. The lock member is inserted into the opening, the lock member is provided so as to be able to protrude and retract from the opening by a predetermined stroke, and a lock body including a lock case having a fixing piece formed on the other side opposite to the one side is provided, The lock member has a claw piece having a spring elasticity for engaging with a locking piece formed inside the lock case when pushed into the lock case, and an engaging member formed on the fixing piece of the lock case. Formed integrally with the stopper piece inserted into the hole When the slide piece is inserted into a specific keyhole of the keyhole, the slide piece is moved to match the position of another keyhole with the through hole, and when the slide piece is pulled out, the slide piece is moved back to the original position. A first key piece that functions to make the position of the through hole inconsistent with another key hole, and a second key piece that is inserted into the other key hole and releases the engagement state of the claw piece. A security lock device provided with a key, wherein a fixing piece of the lock case is fitted in an engagement groove of the square case, and when the lock member is pushed into the lock case, a stopper piece of the lock member is formed. The lock case is configured so that the lock case does not come off from the square case by engaging the front end of the lock case with the locking groove formed in the end surface of the case.

According to a fourth aspect of the present invention, in order to achieve the same object, in a case for storing a recording medium provided with the security lock device according to the third aspect, the security lock device according to the second aspect is provided. Is a security lock device of a case for accommodating a recording medium.

In order to achieve the same object, a case for storing a recording medium according to claim 5 is a square case in which a door is provided in a case main body for storing a recording medium such as a compact disk so that a door can be opened and closed. A lock member having a stopper piece is provided in an engagement groove formed along the free end side of the door so as to be able to protrude and retract from the lock case, and when the lock member is pushed in, the stopper piece is inserted into the lock case. When the fixing piece of the security lock device configured to be inserted into the engaging hole of the formed fixing piece is fitted and the lock member is pushed into the lock case, the tip of the stopper piece is By engaging with a locking groove formed on the end face of the case,
The lock case of the security lock device is configured not to come off from the square case.

In order to achieve the same object, a display method using a case for storing a recording medium provided with a security lock device according to claim 6 is a display using a case for storing a recording medium provided with a security lock device. The method is characterized in that display contents or a message to the user are displayed on the periphery of the lock case and displayed.

[0011]

When the lock member is pushed into the lock case, the claw piece elastically contacting the locking piece formed inside the lock case moves to the lower part of the locking piece. And the stopper piece is inserted into the engagement hole formed in the fixing piece of the lock case (locked state). In the unlocked state, when the first key piece of the key is inserted into a specific key hole of the lock member and the second key piece is inserted into another key hole, the first key piece at the head becomes a sliding piece. Is moved so that another keyhole matches the position of the through hole of the sliding piece, and the second keypiece presses the portion of the claw piece to which the spring elasticity is applied, thereby releasing the engagement state.
Then, when the key is pulled out, the lock member is lifted up to a predetermined stroke, and the second key piece moves upward in a state where the engagement of the claw piece is released, and the tip end of the key piece applies the spring elasticity of the claw piece. At the same time, the claw is re-engaged on the locking piece. Further, the first key piece functions to move the sliding piece to the original position again so that the positions of the other keyholes and the through holes of the sliding piece do not match.

The security lock device for a case for storing a recording medium can be easily attached to and detached from a rectangular case in which a recording medium such as a compact disk is stored in a case body and a door can be freely opened and closed. Operation can be performed with one touch. In addition, since the claw piece and the stopper piece that give the spring elasticity of the lock member are integrally formed,
The structure is simple and assembly is easy.

In the lock member of the security lock device, a dummy hole communicating with the dummy keyhole provided in addition to the keyhole is provided in the sliding piece, and the locking member communicates with the groove in which the sliding piece is housed. A window hole is provided. Therefore, if an illegal foreign matter such as a nail is inserted from the dummy keyhole into the dummy hole, the unlocking cannot be performed, and the sliding piece moves to one side, and a part thereof appears in the window hole. .

In the security lock device of the case for storing the recording medium, it is possible to confirm that an unauthorized unlocking operation has been performed by a sliding piece appearing in the window hole. It is useful in doing.

(Invention of Claim 3) In order to attach the security lock device to the square case containing the recording medium, the fixing piece of the lock case of the security lock device is fitted into the engaging groove of the case. Push in the lock member. As a result, the tip of the stopper piece of the lock member engages with the locking groove formed on the end face of the case, so that the lock case cannot be removed from the rectangular case, and the door of the case cannot be opened. Also,
To open the door of the case, the security lock device may be removed from the case after performing the unlocking operation described in the first aspect of the present invention.

The case for storing the recording medium provided with the security lock device can be divided into two rental systems: a sales case when shipped from the current production / release company and an exhibition / rental case prepared at a rental shop. It is possible to apply it, and by attaching a security lock device to the sales case, it can be used as it is as a display case as it is, and similarly, the exhibition and rental case can be used as an exhibition and rental case with security function, so it is very difficult Good convenience.

(Invention of Claim 4) In the case for storing a recording medium provided with this security lock device, it is possible to confirm that an unauthorized unlocking operation has been performed by a sliding piece appearing in the window hole. It is. The operation of the security lock device is the same as that described in the second aspect of the present invention, and a description thereof will not be repeated.

(Invention of Claim 5) There are two types of rental systems, a storage case for shipping from a current production and release company and a display / rental case prepared at a rental shop. This is a new type of case in which the security lock device having the structure specified here can be retrofitted.

According to a sixth aspect of the present invention, in a display method using a case for storing a recording medium provided with the security lock device, display contents or a message can be displayed on a peripheral surface of the lock case of the security lock device. Therefore, it is convenient in terms of advertising, differentiation and management of the recording medium.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of the security lock device,
2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a sectional view taken along line BB of FIG. 2, FIG. 4 is a plan view of a sliding piece, FIG.
Is a partially cutaway front view of the security lock device showing a state where the lock member is pushed in, FIG. 7 is a partially cutaway front view of the security lock device illustrating an unauthorized unlocking operation, and FIG. 8 is a sales case for storing a recording medium. 9, FIG. 9 is a cross-sectional view taken along line CC of FIG. 8, FIG. 10 is a cross-sectional view taken along line DD of FIG. 8, FIG. 11 is an explanatory view showing how to attach the security lock device to a sales case, and FIG. FIG. 13 is an explanatory view showing a state in which the security lock device is attached to the sales case and the lock member is pushed in, FIG. 13 is an explanatory view showing a state in which the key is inserted into the lock body and unlocked, and FIG. FIG. 15 is a perspective view showing the attached state, and FIG. 15 is a perspective view showing the state in which the security lock device is attached to the exhibition / rental case.

In FIG. 1 to FIG.
Is a lock body 2 including a lock case 10 and a lock member 30.
And a key 55. Box-shaped lock case 1
0, a step portion 13 extending slightly outward from an opening 12 formed in an upper surface 11 which is one side surface in the longitudinal direction;
13 are respectively formed, and two locking pieces 14 are formed at a substantially middle level inward and spaced apart in the longitudinal direction. Lock case 1
Fixing pieces 16 and 18 are respectively formed at the center and both end positions of a bottom face 15 which is the other side face opposing the upper face 11 of the “0”, and an engaging hole 17 is formed in the center fixing piece 16. Notches 21 and 22 are formed on the bottom surface 15 of the left and right side walls 19 and 20 of the lock case 10, respectively.

The lock member 30 is integrally formed of a synthetic resin, and has one specific keyhole 35, two other keyholes 36, as shown in FIGS. Two dummy keyholes 37 are arranged substantially on a straight line, and a rectangular groove 38 orthogonal to them is provided in the longitudinal direction. Reference numeral 39 denotes a window hole provided on the base 31 so as to communicate with the groove 38 on the left side of the specific keyhole 35. Upward hook pieces 40 are respectively formed below both ends of the base 31. A substantially V-shaped stopper piece 41 is formed at the center of the lower surface of the base 31, and the inner space of the stopper piece 41 is provided so as to substantially match the position of the dummy keyhole 37. Further, at the left and right positions of the stopper piece 41, a protrusion 44 and a claw piece 45 are formed in a vertical direction on a loop portion 43 for imparting spring elasticity, and the protrusion 44 is disposed directly below the other keyhole 36. To be provided. Reference numeral 46 denotes an abutment projection provided on the lower surface of the base 31.

Reference numeral 50 denotes a plate-like sliding piece. As shown in FIG. 4, the sliding piece 50 has through holes 51 corresponding to the specific keyhole 35, another keyhole 36, and the dummy keyhole 37, respectively. 5
2, 53 are formed. The through holes 53 therein are dummy holes. As shown in FIGS. 2 and 3, the sliding piece 50 is loosely fitted in the groove 38 of the base 31 and is slidably provided.

Then, the lock member 30 is inserted from the opening 12 of the lock case 10 and the hook piece 40 is
, The lower portion of the claw piece 45 is elastically contacted with the locking piece 14, and the distal end portion 41 a of the stopper piece 41 is provided so as to be located on the center line of the engagement hole 17. The lock main body 2 is configured to be able to come and go through the opening 12. The lock member 30 is, as shown in FIG.
The claw piece 45 engages with the lower surface of the locking piece 14 when pushed into the lock case 10, and the distal end 41 a of the stopper piece 41 is inserted into the engagement hole 17. At this time, the abutting projection 46 comes into contact with the locking piece 14 so that the pushing depth of the lock member 30 is regulated.

Reference numeral 55 denotes a key of the lock body 2. When the key 55 is inserted into the specific keyhole 35, the key 55 moves the sliding piece 50 so that the positions of the other keyholes 36 and the through holes 52 are adjusted. A first key piece 56 that functions to move the sliding piece 50 back to its original position when pulled out so that the positions of the other keyholes 36 and the through holes 52 do not match; A pin-shaped second key piece 60 that is inserted into the lock member 36 to release the engagement state of the claw piece 45 of the lock member 30 is provided. As described above, the security lock device 1 of the case for storing the recording medium is configured.

As shown in FIG. 7, in the security lock device 1, even if an unauthorized nail n or the like is inserted into the dummy key hole 37 to perform the unlocking operation, the lock cannot be unlocked. Moreover, in this case, since the sliding piece 50 moves to the left and a part thereof is shown in the window hole 39, it is possible to confirm that an illegal operation has been performed.

FIG. 14 shows a sales case 80 as an example of a case for accommodating a recording medium. The known sales case when shipped from a conventional manufacturing and sales company is redesigned and displayed at a rental shop. The security lock device 1 is provided so that it can be retrofitted so that it can be used as a case. Specifically, the recording medium 1
One side 82a of a door 82 is pivotally supported by a hinge on a square case body 81 that stores 00, and the door 82 is provided to be openable and closable. As shown in FIG. 8 to FIG.
The width (thickness) dimension of the free end 82b side of the door 82 is slightly reduced, and a locking groove 84 is formed at the center position of the end surface 83, and cutouts 85, 85 are formed on both sides of the locking groove 84, respectively. The space between the cutouts 85 is set to the same size as the space between the fixing pieces 16 and 18 of the lock case 10 of the security lock device 1. 86 is a recess formed in the end surface 83 of the sales case 80, 87 is the door 8
2 are formed inside the free end 82b, and when the door 82 is closed, the protrusion 87
2 is provided so as not to be opened carelessly. Reference numeral 89 denotes an engagement groove formed along the outer edge 88 of the end surface 83 of the sales case 80.

When attaching the security lock device 1 to the selling case 80, as shown in FIGS. 11 and 12, the fixing pieces 16 and 18 of the lock case 10 are
By moving to the left after aligning with 5, 85,
The fixing pieces 16 and 18 are fitted into the engaging grooves 89 and 89, respectively, so that the lock case 10 is fixed. Thus, the lock member 3
0 is pushed into the lock case 10 to lock it, the tip 41a of the stopper piece 41 of the lock member 30 engages with the locking groove 84 of the sales case 80.
Is not detached from the sales case 80, and opening of the door 82 is prevented.

FIG. 14 shows an embodiment in which the security lock device 1 is attached to a sales case 80 and is used as it is for a display case. On the peripheral surface of the lock case 10, items such as the name of a rental shop, "rental OK", a message, and the like can be displayed and displayed. When lending a recording medium, the security lock device 1 may be removed from the sales case 80 and then the internal recording medium may be taken out. The unlocking operation is described above.

The operation and effects of the present invention have been described in the first aspect of the present invention, and the description thereof will be omitted.

Reference numeral 90 denotes a display / rental case integrally formed of a synthetic resin material. As shown in FIG. 15, the rental case 90 is thinly formed on a square case main body 91 for accommodating the recording medium 100. A door 92 is provided so as to be openable and closable via the two hinge portions (not shown) provided, and the security lock device 1 is provided on the free end 92b side of the door 92 so as to be retrofittable. Specifically, the rental case 90 is provided with the locking groove 8 of the sales case 80 described above.
4, a configuration corresponding to the notch 85 and the engagement groove 89 is provided, but the description is omitted because the contents are duplicated. This display / rental case 90 can be used as a display / rental case having a security function. It should be noted that the fact that a message or the like can be displayed on the periphery of the lock case 10 for display is also described in the sales case 80.
Is the same as

[Brief description of the drawings]

FIG. 1 is a plan view of a security lock device.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a plan view of a sliding piece.

FIG. 5 is a front view of the key.

FIG. 6 is a partially cutaway front view of the security lock device showing a state where a lock member is pushed in;

FIG. 7 is a partially broken front view of the security lock device illustrating an unauthorized unlocking operation.

FIG. 8 is a plan view of a sales case for storing a recording medium.

FIG. 9 is a sectional view taken along line CC of FIG. 8;

FIG. 10 is a sectional view taken along line DD of FIG. 8;

FIG. 11 is an explanatory view showing how to attach the security lock device to a sales case.

FIG. 12 is an explanatory view showing a state in which the security lock device is attached to a sales case and a lock member is pushed in;

FIG. 13 is an explanatory view showing a state in which a key is inserted into a lock main body and unlocked.

FIG. 14 is a perspective view showing a state in which a security lock device is attached to a sales case.

FIG. 15 is a perspective view showing a state in which the security lock device is attached to the exhibition / rental case.

[Explanation of symbols]

1 → Security lock device 2 → Lock body 10 → Lock case 11 → Upper surface (one side) 12 → Opening
14 → locking piece 15 → bottom face (other side face) 17 → engagement hole 16, 18 → fixing piece 30 → lock member 31 → base 35 → specific keyhole
36 → other keyhole 37 → dummy keyhole 38 → groove 39 → window hole 41 → stopper piece 41a → tip 45 → claw piece 50 → sliding piece 51-53 → through hole (53) → dummy hole 55 → key 56 → First key piece 60 → Second key piece 80 → Sales case (case) 81 → Case body 82 →
Door 82b → free end 83 → end face 84 → locking groove 85 → notch 88 → outer edge 89 → engaging groove 90 → exhibition / rental case (case) 91 → case body 92 → door 92b → free end 98 → outer end Rim 100 → recording medium

Claims (6)

[Claims] 1. A sliding member having through holes corresponding to respective keyholes slidable on a base provided with a plurality of keyholes arranged substantially on a straight line and a groove orthogonal to the keyholes in a longitudinal direction. A lock member provided, the lock member is inserted into an opening formed on one side surface in the longitudinal direction, the lock member is provided so as to be able to protrude and retract from the opening by a predetermined stroke, and a recording medium such as a compact disk is used as a case. A fixing piece formed on the other side opposite to the one side is fitted into an engagement groove provided along the free end side of the door of a square case which is housed in the main body and the door is freely opened and closed. A lock body comprising a lock case provided, wherein the lock member has a claw piece having a spring elasticity to be engaged with a locking piece formed inside the case when pushed into the lock case. , An engagement hole formed in the fixing piece of the lock case When integrally formed with a stopper piece to be inserted into the keyhole of the keyhole, the slide piece is moved when inserted into a specific keyhole to match the position of the other keyhole with the through hole, and when the keyhole is pulled out. And a first key piece that functions to move the sliding piece to its original position again to make the position of the through hole inconsistent with the other key hole, and to engage the claw piece inserted in the other key hole. A security lock device for a case containing a recording medium, comprising a key provided with a second key piece for releasing a state. 2. A dummy hole communicating with a dummy keyhole provided in addition to the keyhole is provided in the sliding piece, and a window hole communicating with a groove accommodating the sliding piece is provided in the lock member. 2. The storage medium according to claim 1, wherein the sliding piece moves so as to represent a part of the sliding piece in the window hole when foreign matter is inserted into the dummy hole. Security lock device for the case. 3. A quadrangular case in which a door is openably and closably provided on a case main body for storing a recording medium such as a compact disk and an engagement groove is formed along a free end side of the door, and is disposed substantially on a straight line. A locking member having a base provided with a plurality of formed keyholes and a groove orthogonal to the keyhole in a longitudinal direction, a sliding member provided with a sliding piece having a through hole corresponding to each keyhole slidably, A lock case in which the lock member is inserted into an opening formed in the side surface, the lock member is provided so as to be able to protrude and retract from the opening by a predetermined stroke, and a fixing piece is formed on the other side facing the one side. A lock main body, wherein the lock member has a spring resilient claw that engages with a locking piece formed inside the case when pushed into the lock case; and the fixing piece of the lock case. A stopper piece inserted into an engagement hole formed in The sliding piece is moved when inserted into a specific keyhole of the keyhole so that the position of the through hole matches the position of another keyhole, and the sliding piece is again removed when the keyhole is pulled out. A first key piece that moves to an original position to make the position of the other hole and the through hole inconsistent, and a second key that is inserted into the other key hole and releases the engagement state of the claw piece Security lock device provided with a key provided with a piece, a fixing piece of the lock case is fitted in the engagement groove of the square case, and when the lock member is pushed into the lock case, By engaging the tip of the stopper piece of the same member with the locking groove formed on the end face of the case,
A case for storing a recording medium provided with a security lock device, wherein a lock case is not detached from a square case. 4. The security lock device according to claim 3, wherein the security lock device is a security lock device of a case for storing the recording medium according to claim 2. Case. 5. A rectangular case in which a door is openably and closably provided on a case main body for storing a recording medium such as a compact disk, and a stopper piece is formed in an engagement groove formed along a free end side of the door. A security lock provided with a lock member provided with a lock case so that the stopper piece can be inserted into an engagement hole of a fixing piece formed in the lock case when the lock member is pushed in. When the fixing piece of the device is fitted and the lock member is pushed into the lock case, the tip of the stopper piece is engaged with a locking groove formed on the end face of the case, so that the security lock is provided. A case for accommodating a recording medium, wherein a lock case of the device is configured not to come off from a square case. 6. A display method using a case for storing a recording medium provided with a security lock device, wherein the display content or a message to the user is displayed and displayed on a peripheral surface of a lock case of the security lock device. A display method using a case for storing a recording medium provided with a security lock device.