JP2000357279A - Self-sounding article monitor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a lock mechanism which can be reused by allowing a clear case and a self-sounding tag in a self-sounding article monitor device to be separable from each other. SOLUTION: A two-stage lock structure is comprised of a two-stage groove for lock provided in a tag and a U-shaped lock spring fixed to the clear case, and the tag is attached to the case by the groove in the first stage of the lock structure, and a commodity is locked in the case by the groove in the second stage. When the lock mechanism is inserted to a releaser 28, the lock spring is attracted right and left and is opened by the action of strong magnets provided on right and left faces of the releaser 28 and gets over a lock projection, and then, the self-sounding tag is freely moved in the vertical direction, thus releasing the lock mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-sounding article monitoring device which is fixed to a product in order to prevent shoplifting of the product in a CD shop or the like, and particularly to a lock structure thereof.

[0002]

2. Description of the Related Art Conventionally, as this kind of article monitoring apparatus,
2. Description of the Related Art A passive paper tag having no power supply therein is known. This paper tag is attached to the product, and if you try to take out the product without permission, it will react when you pass the side of the transmitting device installed at the entrance of the store etc., and the alarm provided on the transmitting device will sound and the theft will be stolen Prevention.

[0003] However, although this paper tag is inexpensive, the alarm sounds at the gate, and when multiple people pass at the same time, it is not possible to know which person is trying to illegally take out the product, so that the site There is a drawback that is difficult to hold down. In addition, there is also a disadvantage that a criminal trying to forcibly pass through the gate cannot determine the point at which a warning is to be transmitted, so that he can escape with a delay.

[0004] Further, as a solution to this disadvantage, there is known a self-sounding type article monitoring apparatus which has a power supply inside, receives a radio wave from a transmitter at an entrance, and sounds an alarm on the tag itself.

[0005] In the case of a CD, for example, a self-sounding article monitoring device, as shown in FIG. 6, a transparent case (clear case) 1 made of synthetic resin, an alarm operation detection switch 6 and a buzzer 1
In the clear case 1, a product (cassette containing a compact disc) 8 is accommodated. The operation of the buzzer 17 is controlled by the wireless reception circuit 15 and the detection switch 6, and sounds when the cassette 8 does not exist in the clear case 1 or when the self-sounding article monitoring device passes through the gate. Things.

At a store, a cassette 8 containing a CD is housed in a clear case 1 of a self-sounding type article monitoring device and displayed, and when selling compact discs to customers, a store clerk does not sound the buzzer 12. After setting, the cassette 8 is taken out of the clear case 1 and the compact disc is handed to the customer in exchange for a fee. The self-sounding article monitoring device from which the cassette 8 has been taken out is repeatedly used.

In the above-mentioned self-sounding article monitoring apparatus, when the customer takes out the cassette 8 from the clear case 1 of the self-sounding article monitoring apparatus, the alarm operation detection switch 6 determines that the cassette 8 does not exist in the clear case 1. Is detected and a sounding command is issued to the buzzer 17, and the buzzer 17 sounds in response to the sounding command. Thus, the clerk can know that the cassette 8 has been illegally removed from the clear case 1.

If the customer tries to take the cassette 8 out of the store without permission with the cassette 8 accommodated in the clear case 1 of the self-sounding article monitoring apparatus, the receiving circuit 15 of the self-sounding article monitoring apparatus is provided at an entrance gate or the like. The buzzer 17 issues a sounding command to the buzzer 17 in response to a signal from the transmitting circuit, and the buzzer 17 sounds in response to the sounding command. This allows the clerk to know that the compact disc is being illegally taken out of the store.

[0009] The self-sounding article monitoring device makes it easier to identify the culprit because the product to be taken out rings, and is more effective than the passive paper tag in holding down the site. However, while a paper tag costs 10 to 20 yen, a self-sounding tag is expensive at 200 to 300 yen, so that it is difficult to use many of them.

As a paper tag, a tag on which a tuning circuit made of LC is printed on paper on which a barcode is printed is generally used. For example, a frequency of 8.2 MHz is used. 8.2 MHz is a frequency suitable for producing the LC in a size of 2 to 3 cm in length and width. In addition, 58 kh
Paper tags used in z are also widespread. 58 kh
If the above-mentioned LC circuit is made at z, it becomes too large to be practical, and this 58 kHz paper tag uses a special capacitor. Generally 58kHz low frequency
Although z has better performance, 8.2 MHz is lower in cost because the above-mentioned general-purpose LC circuit can be used.

The self-sounding tag is currently 22 kHz, 3
7.5 kHz and 31.5 kHz are known.
If the self-sounding tag uses the same frequency as the frequency of use of the passive paper tag, the transmitting device for the paper tag can be used as it is, and both can be used in the already popular passive paper tag system. It can be used together. In other words, the expensive self-sounding tag can be considerably tamper-proof by mixing only about one out of every ten in a sampling manner. If the frequency is shared with the passive paper tag, it can be used at the entrance, etc. Since the installed transmitting device can be shared, it is easier to spread. Therefore, it is preferable that the self-sounding tag is designed at a frequency of 58 kHz or 8.2 MHz, which is the most widely used frequency of the paper tag.

As a lock mechanism for such a self-sounding tag, a conventional Japanese Patent Application Laid-Open No. 9-328184 and Japanese Patent Application Laid-Open No.
Japanese Patent Publication No. 11566 is known. The conventional example,
A storage container main body having an opening on the back side through which a CD case can be taken in and out, and a push button type lock mechanism for restricting removal of the CD case at an upper end portion of the storage container main body, the lock mechanism is arranged on the left and right. And a lock member which is held in a protruding state by the provided leaf spring.

The lock mechanism has protrusions formed on both sides of a vertically moving lock member, and the leaf spring is formed by bending a single spring material (magnetic material) into a U-shape. I have. Locking of the lock mechanism is performed by pushing a button portion projecting upward from the top of the lock mechanism with a finger. When the button portion is pushed in, the leaf springs disposed on both sides of the lock member engage with the engagement step portions on both sides, and maintain the lock member in a lowered state. In this way, the lock member projects into the gap in the container and is locked. Since the lock member is locked on both sides by the leaf spring, the lock does not come off. When unlocking, a locking device having a strong magnet is applied to both side surfaces of the lock mechanism, and the leaf spring is drawn in the side direction. The unlocking device has a recess in which the lock mechanism can be stored as it is, and has strong magnets at both ends of the recess. When both ends of the leaf spring are drawn to both sides, the lock member is disengaged from the engagement step and can be raised. When the lock member rises, the CD case can freely move through the gap, and the CD case can be taken out arbitrarily.

However, the above-mentioned conventional lock mechanism is fragile because the lock bar protrudes from the upper right portion of the case, and the biggest disadvantage of the conventional example is that the case and the lock mechanism are integrated and separated. That is not possible.

The case costs 50 to 60 yen and is used in large quantities. However, since the lock mechanism having a self-sounding tag built-in therein costs 200 to 300 yen each, it is used only for sampling, for example, one in ten cases. The other cases are dummies in which the lock mechanism is similar in appearance to the self-sounding tag, but does not include the self-sounding tag. As described above, since the lock mechanism incorporating the self-sounding tag is expensive, it is desirable to reuse the lock mechanism. However, in the case where the case and the lock mechanism are integrated as in the above-described conventional example, even if the case portion is damaged, the entirety including the unbroken lock mechanism portion must be discarded, so that it is useless.

[0016]

SUMMARY OF THE INVENTION The present invention improves the disadvantages of the above-mentioned conventional lock mechanism in the self-sounding article monitoring apparatus, makes the case and the lock mechanism separable, and allows only the case (or only the lock mechanism). It is an object of the present invention to provide a lock mechanism in which, when broken, the lock mechanism is removed from the case and an unbroken portion can be reused.

[0017]

SUMMARY OF THE INVENTION The present invention relates to a self-sounding article monitoring apparatus having a case for storing a product and a lock mechanism provided in the case for locking the product to the case when stored. Has a two-stage lock structure, wherein the product is locked and the lock mechanism is detachable from the case.

Further, the two-stage locking structure includes a two-stage locking groove provided on the lock bar, and a U-shaped lock spring which is fitted into the groove and locked and released by an external magnet. The lock mechanism is attached to the case by the first groove of the lock structure, and the product is locked in the case by the second groove.

A case for accommodating a product and a two-stage lock structure are provided. The two-stage lock structure is provided with a lock groove provided in a two-stage lock bar, and the lock is fitted in the groove. The lock structure comprises a U-shaped lock spring that is released by an external magnet. The lock structure is attached to the case by a first-step groove, and has a lock mechanism that locks a product in the case by a second-step groove. A releaser for releasing the lock of the sounding article monitoring device, wherein the releaser comprises a releaser main body, a base separate from the releaser main body, and used in combination with the releaser main body, wherein the second-stage lock is provided. When the product is released and the product is taken out, the two can be used in combination, and by using the releaser body alone, the first-stage lock can be released to separate the lock mechanism from the case. And wherein the door.

Further, the releaser comprises a releaser main body and a tag stopper attached to the bottom of the releaser main body, and the releaser main body is magnetically shielded.

The self-sounding article monitoring apparatus is provided with a power switch for turning on the self-sounding article monitoring apparatus at the time of the lock, and is provided at the tag stopper of the releaser at the time of unlocking. The power switch is turned off by the claw.

Further, the power switch for turning on the power of the self-sounding article monitoring device is a slide switch, and is a non-contact type power switch such as a photoelectric switch or a magnetic detection switch.

[0023]

FIG. 1 is an overall view of a self-sounding article monitoring apparatus according to the present invention. In FIG. 1A, reference numeral 1 denotes a clear case, which is made of transparent plastic, and stores a CD or the like therein and is arranged as a product in the store. FIG. 1A shows a tag 2 serving as a lock mechanism according to the present invention, which is inserted from the tag insertion slot 4 of the clear case 1 and attached to the case 1. Reference numeral 5 denotes an alarm port, which has a built-in alarm device such as a buzzer. The buzzer sounds if the product is illegally taken out of the case, or if the user tries to leave the case silently while leaving the case. . Reference numeral 6 denotes a detection switch provided on an upper portion of the tag. When a product is stored in the case and locked as described later, the detection switch is pushed by the product and turned off. Therefore, when the product is illegally removed as described above, the switch turns on,
The buzzer has a mechanism. 3 in FIG. 1 (b)
Indicates a releaser to unlock the tag,
It is provided at the entrance of a store or the like.

As shown in FIG. 2, the tag (lock mechanism)
Is inserted from the tag insertion slot and attached to the case 1 as shown in FIG. FIG. 2C is an enlarged view of the tag insertion portion. As shown in the figure, when the tag 2 is pushed in, the CD product whose lower end is initially at the position 9 is pushed down to the position indicated by the dotted line 8 so that the detection switch 6 is pressed.
Is pushed into the bottom of the CD product to enter an off state. After the switch 6 is turned on (off) at the time of product setting, a power switch (not shown) is turned off.
Since it becomes n, if the product is pulled out without unlocking after being locked once (without turning off the power), the above detection switch is activated, the alarm circuit (not shown) is turned on, and the buzzer sounds. Has become.

FIG. 3 shows a use state of the self-sounding article monitoring apparatus, and FIG. 4 shows a lock releasing operation. FIG.
As shown in (a), the CD product is shown in FIG.
It is inserted avoiding the claw portion 7 of (a). After inserting the CD product,
As shown in FIG. 3B, the tag is locked by pushing the tag (locking mechanism) from below. As shown in FIG.
When locked, the CD is blocked by the case pawl 7 and cannot be taken out.

To release the lock, the locked case is inserted into the releaser from above as shown in FIG. Then, the lock in the tag is released by the action of the strong magnets 9 provided on the left and right side surfaces of the releaser, and the CD product is moved downward, as shown in FIG.
Can be taken out of the CD. Thus, FIG.
As shown in (c), the case can be made free. FIG. 5 shows an operation of separating the tag and the case when the case is damaged. First, the releaser is separated into a main body and a base (FIG. 5A), and a damaged case is inserted into the separated releaser main body (FIGS. 5B to 5C). Since there is no base (tag / stopper described later), if only the clear case is pulled up while pressing the tag with a finger, the lock mechanism for attaching the tag to the case is also released, and the tag is separated from the case (FIG. 5D). ). Finally, the remaining tags may be taken out (FIG. 5E).

Next, the specific structure and operation of the self-sounding article monitoring device of the present invention will be described. FIG. 6 shows a detailed view of the self-sounding article monitoring device of the present invention. In FIG. 6, 1
Is a clear case 1 as in FIG.
Etc.) 18. The self-sounding tag 2 is a member that is attached to the clear case 1 and locks the product 18. The lock mechanism 13 is a fixing means using a U-shaped spring as described later, and the product detection switch 6 is a micro switch for detecting removal of the product. The wireless receiving circuit 15 receives a wireless signal of a gate installed at a store entrance. The power switch 16 is a slide switch that is turned on / off by the lock mechanism 13. As described later, a non-contact type power switch such as a photoelectric switch or a magnetic switch is recommended. The alarm buzzer 17 is a buzzer for notifying an abnormality. FIG. 7 shows a state where the tag is pushed in and is locked.

FIG. 8 is a diagram illustrating details of the lock mechanism of the present invention and its operation. FIG. 8A shows a locked state. As shown in the figure, since the lock spring 20 is locked to the lock projection 22, the lock spring is fitted into the lower groove 25 (see FIG. 3C), and the self-sounding tag 19 cannot move downward. So locked. FIG. 8B is a diagram illustrating a state when the lock mechanism is inserted into a releaser (release device). When the lock mechanism is inserted into the releaser (release device), the strong magnets provided on the left and right side surfaces of the releaser cause the action of FIG.
(B) As shown, the lock spring 20 is attracted to the left and right and opened, and the self-sounding tag 19 can move freely in the up and down direction by getting over the lock projection. That is, the lock mechanism of the tag is released.

FIG. 8 shows a state in which the releaser body and the base (see FIG. 5A) are combined as shown in FIG. 4. In this case, the upper part of the base becomes the tag stopper 24. Is moved until it comes into contact with the tag stopper. FIG. 3C shows a normal unlocked state. At this time, the tag moves downward, and the lock spring 20 is in a state of being fitted into the upper groove 26 (see FIG. 3A), and the lock spring is fixed in the case. Keeps the state attached to the clear case. When the clear case and the tag are broken and the clear case and the tag are separated, as shown in FIG. 5, if the unlocking operation is performed only by the releaser main body, the lock is performed without the tag stopper 24 shown in FIG. Is released, the lock spring 20 also rides over the retaining projection 21 as described above, and the lock can be further released even when the lock spring 20 is stuck in the upper groove 26. Thus, the engagement between the lock spring and the tag is released, the tag 2 can be separated from the clear case, and the tag can be replaced.

FIG. 9 shows the ON / OFF operation when the power switch 16 is a slide switch. When attaching the tag 2 to the clear case, the power switch 16
When the product is mounted in the FF state and the product is mounted in the case, the power switch 16 is turned on after the detection switch 6 is turned off. Therefore, the buzzer does not sound from the attachment of the tag to the attachment of the product, and the power switch 16 is turned ON after the lock. The operation is as follows.

FIG. 9A shows the initial state, in which the lock mechanism of the clear case 1 is in the released state. FIG. 4B shows a locked state. When the tag 2 is pushed upward to be locked, the power switch 36 is turned on by hitting the clear case 1. FIG. 9C shows the state of insertion into the releaser. In this state, since the clear case is in the locked state, the power switch is in the ON state. When the lock is released by the downward movement of the tag, the power switch is pressed by the claw 27 provided on the tag stopper 24 of the releaser and turned off as shown in FIG. FIG. 7E shows the same initial state as FIG. The product detection switch is turned off when in contact with the product, and turned on when separated from the product. Therefore, when the lock is released by the releaser, the power switch is turned off as described above, so that the buzzer does not occur. However, if the product is taken out without releasing the lock by the releaser, the buzzer sounds. Similarly, when trying to pass through the gate without releasing the lock with the releaser, the wireless receiving circuit receives the transmission radio wave from the gate and sounds the buzzer. Thus, if the product is illegally taken out, the case itself sounds and theft can be prevented more reliably than the paper type. If the operating frequency of the wireless receiving circuit is set to be the same as the operating frequency of the paper tag, the paper tag system can be used as it is.

When a non-contact switch such as a photoelectric switch or a magnetic detection switch is used as the power switch,
It looks like this: FIG. 13 is an overall perspective view of the self-sounding article monitoring device (tag) of the present invention, and FIG. 14 is a side view of the self-sounding article monitoring device (tag). In the figure, 6
Numeral denotes the detection switch. Numerals 21 and 22 denote a retaining projection 21 and a lock projection 22 in FIG. A groove 50 is provided on a side surface of the tag, and when the power switch is a slide switch, a hole 51 is provided in the groove as shown in FIG. The operator of the slide switch indicated as 16 of 9 is protruding. FIGS. 14B and 14C show examples of using a non-contact power switch. FIG.
In FIG. 12B, a sensor 52 is a magnetic sensor 43 that is actuated by a magnet 44 provided at a position opposite to the case at the time of locking, for example, as shown in FIG.
The sensor may be a light receiving element that detects that the light is not received by natural light when the case is covered by the lock. FIG. 14C shows another example of the photoelectric type, which comprises a pair of a light-emitting element 53 and a light-receiving element 54, and as shown in FIG.
It works by. In the case of FIG. 12A, ON and OFF detection sensors 40 and 41 are provided to ensure ON and OFF operations.

In the case of the photoelectric type shown in FIG. 12C, in order to prevent a malfunction of the power switch, for example, Japanese Patent Laid-Open No.
It is recommended to use the circuit of FIG. 15 used in US Pat. The operation of FIG. 15 is as follows. The detection switches 68 and 69 in the figure correspond to the detection switch 6, and when the product is stored, the detection switch 68 is turned on and 69 is turned off. When a product is stored in the case, the detection switch 68 is turned on, an optical signal of a specific code pattern is generated from an optical signal generator in the tag, and the signal is transmitted from the light emitting element 61 to the light receiving element 62 via a power control circuit (not shown). The switch circuit 65 is turned on by checking the coincidence with the predetermined code pattern. As a result, the alarm circuit 67 is in a standby state, and an alarm sounds when the product is removed without permission and the product detection switch 69 is turned on. Note that the detection switch 68 is used as the detection switch 68.
And 69, but the detection switch 68 is the detection switch 6
As described above, the on-off operation is opposite to that of No. 9. The releaser has a power supply, and the optical signal generator for releasing a specific pattern is always operating. When the product is normally removed at the counter of the store, the tag falls downward at the time of unlocking, and the light supplied from the light emitting element 48 provided at the position opposite to the releaser as shown in FIG. When the signal is received by the light receiving element 46, the switch circuit 65 is turned off upon matching with a predetermined release pattern, and no alarm is sounded even if the detection switch 69 is turned on. The use of the non-contact type power switch has an effect that the release switch is not required to have the claw 27 for releasing the slide switch at the same time as being hard to be broken.

As a further simplification, FIG.
6 is shown. In the case of this example, when the product is loaded (locked), the switch circuit 74 which is always on is turned off by checking the coincidence of the release patterns between the light emitting element 48 and the light receiving element 46 shown in FIG. Fig. 12 (b)
A simple non-contact on / off switch is used. In this case, the detection switch 6 can be used as the commodity loading detection switch, and the optical signal generator provided in the tag can be omitted, so that tags used in large quantities can be inexpensive. The switch circuit 7
Reference numeral 4 denotes a self-holding type, which maintains an off state until the detection switch 6 is next turned on. The non-contact type switch may be another type of infrared light type or radio wave type. Further, the detection position at the time of locking and unlocking is not limited to the side direction of the tag, but may be the bottom or another side surface (front and rear surfaces).

FIGS. 10 and 11 show another embodiment of the unlocking releaser used in the self-sounding article monitoring apparatus of the present invention. As described above, the releaser is provided with a strong magnet for attracting the lock spring to the left and right to release the lock as shown at 33 and 34 in FIG. 10 at the locations 38 and 39 in FIG. 10 of the releaser body. Embedded. The magnet is made of neodymium, and is strong enough to break internal magnetic recording when a magnetic recording medium such as a magnetic card is brought close to the magnet.

Accordingly, in this embodiment, the releaser is provided with a magnetic shield in order to use the self-sounding type article monitoring device also for a DVD or the like. The releaser shown in FIG. 5 has a structure in which the releaser main body 28 is fitted on the base 29. However, in this embodiment, as shown in FIG. The structure is such that it is screwed to the lower groove 40 of the releaser body. The magnetic shield material includes left and right side plates 32 made of a 6 mm iron plate and a cover 31 made of a 2 mm iron plate further covering the side plates 32.
As shown in FIG.
It is assembled as shown in (a), and a stopper is attached in the lower groove 40, so that the entire releaser is in use. An opening 41 for inserting a clear case is provided on the upper surface of the cover 31.

According to this embodiment, although a small amount of magnetic flux leaks into the information from the above-mentioned opening, the amount is small, and even if a magnetic recording medium such as a DVD is inserted, the recorded contents are not damaged.

[0038]

As described above, in the self-sounding article monitoring device of the present invention, the self-sounding tag which could not be separated from the case in the past can be separated from the clear case, so that the cost is high. Separate the tag from the clear case so that it can be reused, so if the clear case breaks or only the tag breaks, you can separate them and use them multiple times with different cases and tags Therefore, there is an effect that the use cost can be greatly reduced.

Further, since the lock mechanism of the present invention is provided at the lower portion, it is possible to take out an internal product such as a CD without turning over, and to omit one operation process at the time of unlock operation. Work efficiency is good.

Further, since the lock mechanism is provided at the center of the lower part of the case, the locking state at the time of locking is more secure than that of the conventional one provided on the upper right side. However, it is difficult to take out the product. On the other hand, in the conventional device, since the lock mechanism is biased to one of the end faces, it is possible to take out the product inside by breaking the claw portion on the opposite side to the lock mechanism.

Since the unlocking releaser used in the self-sounding article monitoring device of the present invention has a detachable tag stopper, the self-sounding tag can be separated from the clear case by removing the tag stopper as described above. Is a convenient thing to do.

Further, by applying a magnetic shield to the releaser, the self-sounding article monitoring apparatus of the present invention can be used for a magnetic recording medium such as a DVD.

[Brief description of the drawings]

FIG. 1 is an overall view of a self-sounding article monitoring device of the present invention.

FIG. 2 is a diagram showing an operation of attaching a self-sounding tag to a clear case in the self-sounding article monitoring device of the present invention.

FIG. 3 is a diagram showing an operation of storing a product in a clear case in the self-sounding article monitoring device of the present invention.

FIG. 4 is a view showing an operation of removing a product from a clear case in the self-sounding article monitoring device of the present invention.

FIG. 5 is a view showing an operation of removing the self-sounding tag from the clear case in the self-sounding article monitoring device of the present invention.

FIG. 6 is a detailed view of the self-sounding article monitoring device of the present invention.

FIG. 7 is a view showing a state where the tag is pushed in and locked in FIG. 6;

FIG. 8 is a view showing a tag locking mechanism according to the present invention.

FIG. 9 shows ON / OFF of a power switch of the tag of the present invention.
It is a figure showing an operation.

FIG. 10 is a view showing another embodiment of the unlocking releaser used in the self-sounding article monitoring device of the present invention.

FIG. 11 is an assembly view of another embodiment of the unlocking releaser.

FIG. 12 is a diagram illustrating an operation when a non-contact power switch is used.

FIG. 13 is an overall perspective view of the self-sounding article monitoring device (tag) of the present invention.

FIG. 14 is a side view of the self-sounding article monitoring device (tag) of the present invention.

FIG. 15 is a diagram showing an embodiment of a power supply circuit of the self-sounding article monitoring device (tag) of the present invention.

FIG. 16 is a diagram showing another embodiment of the power supply circuit of the self-sounding article monitoring device (tag) of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clear case 2 Tag 3 Releaser 4 Tag insertion port 5 Sound emission port 6 Detection switch 7 Claw part 9 Magnet 13 Lock mechanism 16 Power switch 17 Alarm buzzer 18 Product 21 Retaining projection 22 Lock projection 24 Tag stopper 25, 26 Groove 27 Claw 31 Cover 32 Side plate 33, 34 Magnet 35 Releaser body 36 Stopper

Claims (8)

[Claims] 1. A self-sounding article monitoring device having a case for storing a product and a lock mechanism provided on the case for locking the product to the case when stored, wherein the lock mechanism has a two-stage lock structure. A self-sounding article monitoring device, having a function of locking the product, wherein the lock mechanism is detachable from the case. 2. The two-stage lock structure includes a two-stage lock groove provided in a lock bar, and a U-shaped lock spring that is fitted and locked in the groove and released by an external magnet. 2. The self-sounding article monitoring device according to claim 1, wherein the lock mechanism is attached to the case with the first groove of the lock structure, and the goods are locked in the case with the second groove. . 3. A case for accommodating a product, a two-stage lock structure, wherein the two-stage lock structure is provided with a two-stage locking groove provided in a lock bar, and is fitted in the groove. It consists of a U-shaped lock spring that is locked and released by an external magnet. It has a lock mechanism that is attached to the case by the first groove of the lock structure and locks the product in the case by the second groove. A releaser for releasing the lock of the self-sounding article monitoring device, wherein the releaser comprises a releaser main body, a separate body from the releaser main body, and a base used in combination with the releaser main body. When unlocking and taking out the product, both can be used in combination, and by using the releaser body alone, the first-stage lock can be released and the lock mechanism can be separated from the case. The self Nashiki article unlocking releaser for monitoring and wherein the. 4. A case for accommodating a product, a two-stage lock structure, wherein the two-stage lock structure is provided with a two-stage locking groove provided in a lock bar, and is fitted in the groove. It consists of a U-shaped lock spring that is locked and released by an external magnet. It has a lock mechanism that is attached to the case by the first groove of the lock structure and locks the product in the case by the second groove. A releaser for unlocking the self-sounding article monitoring device, wherein the releaser comprises a releaser body and a tag stopper attached to a bottom of the releaser body, and the releaser body is magnetically shielded. An unlock releaser for the self-sounding article monitoring device. 5. The self-sounding article monitoring apparatus is provided with a power switch for turning on the self-sounding article monitoring apparatus at the time of the lock, and provided at a tag stopper of the releaser at the time of unlocking. 4. The unlocking releaser for a self-sounding article monitoring device according to claim 3, wherein the power switch is turned off by a claw. 6. The unlocking releaser for a self-sounding article monitoring device according to claim 5, wherein the power switch for turning on the power of the self-sounding article monitoring apparatus is a slide switch. 7. A case for accommodating a product, a two-stage lock structure, wherein the two-stage lock structure is provided with a two-stage locking groove provided in a lock bar, and is fitted in the groove. It consists of a U-shaped lock spring that is locked and released by an external magnet. It has a lock mechanism that is attached to the case by the first groove of the lock structure and locks the product in the case by the second groove. In the self-sounding article monitoring apparatus, the self-sounding article monitoring apparatus is provided with a non-contact type power switch for turning on the self-sounding article monitoring apparatus at the time of the lock. A self-sounding article monitoring device, wherein the power switch is turned off. 8. The self-sounding article monitoring device according to claim 7, wherein the non-contact type power switch is a photoelectric switch or a magnetic detection switch.