JP2007200050A - Power release device for self-sounding type article monitor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To release power of a self-sounding type tag by using a light-transmissive material for a release key, making infrared light transmit through the release key, and making a light-receiving element inside the tag receive the infrared light. <P>SOLUTION: In this power release device for a self-sounding type article monitor, where the power is turned on in time of use and wherein the power is turned off by the release key, the release key is made of the light-transmissive material, the release key transmits a control optical signal through the release key in a state that the release key is inserted in a release hole of the self-sounding type article monitor, and the light-receiving element, provided inside the self-sounding type article monitor optically receives the transmitted control signal, to turn off the power of the self-sounding type article monitor. The power release device is provided with an automatic reset type switch, inside a tip of the release hole of the self-sounding type article monitor, and the automatic reset type switch is turned on by a tip of the release key, when the release key is inserted in the release hole, so that a release circuit by the optical signal comes into a wait state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an anti-theft alarm device and its release mechanism, and particularly suitable for use in a sticking self-sounding article monitoring tag used by being fixed to a product to prevent shoplifting of the product. The present invention relates to a power release device.

  Conventionally, a number of mechanisms are known for locking a self-sounding article monitoring tag and a method for releasing the same. However, there are few things made of plastic with a simple structure, inexpensive to make, and hard to break, and with a simple structure for the release key.

  As a locking mechanism for a self-sounding article monitoring tag, there are conventionally known such as JP-A-7-272139, JP-A-7-129866, and JP-A-7-65253. However, the structure is complicated and the manufacturing is troublesome, the operation is complicated, it is easy to break down, it is easy to break, and the manufacturing cost is high. There were few reliable locking mechanisms.

  This self-sounding article monitoring tag includes an alarm activation detection switch and a buzzer, as seen in, for example, JP-A-8-44963, and the operation of the buzzer is controlled by a radio reception circuit and a detection switch. It sounds when the tag is removed or when the tag passes through the gate.

  At the store, the self-sounding article monitoring tag is attached to the product for display, and when the product is sold to the customer, the store clerk releases the lock and does not sound the buzzer. Handing over the product. As described above, when the customer arbitrarily pulls the tag away from the product, the alarm activation detection switch issues a ring command to the buzzer, and the buzzer rings. This allows the store clerk to know that the tag has been removed illegally.

  Also, if the customer tries to take the product outside without leaving the tag, the receiver circuit in the self-sounding article monitoring tag receives a signal from the transmitter circuit provided at the entrance gate etc. The buzzer sounds in response to the ringing command. This allows the store clerk to know that the product is being illegally taken out of the store.

  As another example of such a self-sounding tag locking mechanism, those disclosed in Japanese Patent Application Laid-Open Nos. 9-328184 and 11-11566 combined with a conventional CD case are also known. The conventional example is provided with a storage container main body having an opening on the back surface through which a CD case can be inserted and withdrawn, and a push button type lock mechanism for restricting the removal of the CD case at the upper end of the storage container main body. Is provided with a lock member that is held in a protruding state by leaf springs arranged on the left and right. The lock mechanism has protrusions formed on both side surfaces of a lock member that moves up and down, and the leaf spring is formed by bending a single spring material (magnetic material) into a U shape. Locking of the locking mechanism is performed by pushing the button portion protruding upward from the top of the locking 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 to maintain the lock member in a lowered state. In this way, the lock member protrudes into the gap in the container and is locked.

Since both sides of the lock member are locked by leaf springs, the lock is not released. Further, when unlocking, an unlocking tool having a strong magnet is applied to both side surfaces of the lock mechanism, and the leaf spring is pulled toward the side surface. The unlocking tool has a recess that can store the lock mechanism as it is,
Strong magnets are provided at both ends of the recess. When both ends of the leaf spring are pulled toward both sides, the lock member is released from the engagement step portion and can be raised. When the lock member is raised, the CD case can freely move in the gap, and the CD case can be taken out arbitrarily.

  As a self-sounding tag locking mechanism that improves these, it can be manually operated without using a jig, etc., and when releasing a locked state, it can be unlocked with a simple plastic plate key. A lightweight and inexpensive locking mechanism has been proposed (see Japanese Patent Application Laid-Open No. 2000-339557).

  This proposed locking mechanism has a reverse C-shaped opening leg portion and a lock engaging portion connected to the opening leg portion. And a male locking member having a cross-sectional plate shape having a slope that slides in correspondence with the above-mentioned inverted C-shaped open leg portion, and provided with a lock engaging portion connected to the slope, and the distance between the leg portions is substantially In a locking mechanism consisting of a biped fork-shaped release key corresponding to the width of the male locking member and having a protrusion on the inside of the leg, the male locking member is pushed into the open leg of the female locking member Thus, the locking engagement portions of both are engaged and locked, and the leg portion of the release key of the biped fork shape is pushed in such a way as to sandwich the male lock member so that the tip end portion of the release key leg portion is Insert it between the open legs of the female locking member and The protrusion on the inner side of the leg portion of the key is in contact with the male lock member, and the leg portion of the release key and the open leg portion of the female lock member that is in contact with the release key are pushed outward to expand the lock. The engagement portion is disengaged.

  Further, the male lock member is further provided with a recess connected to the lock engaging portion, and when the lock is released, the protrusion inside the leg portion of the release key fits into the recess of the male lock member. When the release key is pulled out, the male lock member is also pulled out integrally.

  Further, a protrusion is provided on the upper surface of the male lock member, and the switch is turned on and off by engagement with the protrusion. Furthermore, a lock pin integrated with the lock member is provided behind the male lock member, and the lock pin protrudes outward from the case to which the lock mechanism is attached. Holes for inserting the leg portions of the release key are provided on both sides.

  Hereinafter, this conventional lock mechanism will be described in detail. FIG. 1 shows an overall view of a self-sounding article monitoring tag in which this locking mechanism is used. 1 is a plastic case, 3 is a printed circuit board housed in the case, 4 is a buzzer, 5 is a battery, 6 is a long hole provided in the printed circuit board, 7 is a switch, 8 is a male lock member, 9 is a female locking member, 10 is a lock pin, 11 is an upper lid, 12 is a snap switch, 14 is an operating piece of the snap switch, and 13 is an opening provided in the upper lid. The self-sounding tag has a boat shape with a length of 9 cm and a width of 2 cm. The snap switch operating piece 14 protruding from the case is pressed against the product and fixed to the product with tape or the like. As will be described later, as long as the operation piece is pressed, the buzzer does not sound. However, if the tag is illegally removed from the product, the operation piece 14 is turned on and a buzzer sounds. In addition, if the product is illegally silently exited from the entrance without unlocking, which will be described later, the buzzer sounds when the radio wave of the oscillation device at the entrance is received.

  2 and 3 are enlarged views of a portion of the tag locking mechanism. As shown in FIGS. 2 and 3, the female lock member 9 has a substantially U-shaped bottom, an engagement portion 15 that engages with the male lock member, and a reverse C-shape with respect to the male lock member. The legs 17 are formed of a plastic material together with pins 33 and 34 for engaging and fixing the holes of the printed circuit board. The female lock member is affixed to the bottom of the boat-type case and fixed to the case.

The male locking member 8 has two constricted portions, and has a shape similar to that of a violin body at first glance.
The printed circuit board incorporates a circuit having the above-mentioned function for preventing a self-sounding theft, and the buzzer 4 can be sounded by turning on the switch 12 or receiving a radio wave of, for example, 8.2 MHz. Also, the tip 20 of the release key 2 is inserted through the holes 10 '(FIG. 1 (d)) on both sides provided in the front side of the lock pin behind the boat-shaped case 1, and the release is performed as will be described later. When the key is pushed in and pulled to release the lock, the projection 19 (FIG. 3) of the slide switch (power switch) is turned off by the action of the projections 29 and 30 provided on the upper surface of the male lock member. The power supply to the buzzer ring circuit is cut off and the tag does not ring even if it is removed.

  The locking operation and unlocking operation of this locking mechanism are as follows. 2 shows the unlocked state of the lock mechanism, and FIG. 3 shows the locked state of the lock mechanism. As described above, the locking is achieved by engaging the engaging portion 16 of the male locking member with the engaging portion 15 of the female locking member.

  2 and 3, the unlocking key tip 20 is inserted into the holes 10 '(FIG. 1 (d)) on both sides provided on the front side of the lock pin behind the boat-shaped case 1. This is done by gradually pushing the release key deeply, pushing it deeply, and then pulling it out.

As shown in FIG. 2, the release key 2 has a fork-like shape with two legs, and a semicircular protrusion 21 is provided at an appropriate position inside both the legs 20. .
When the release key 2 is inserted and the release key is pushed further from the state in which the semicircular inner protrusion 21 is in contact with the corner portion 25 of the male lock member, the semicircular protrusion is formed on the male lock member. By riding on the corner 25, the tip 20 of the release key opens outward. At this time, the tip 20 of the release key just contacts the inside of the tip leg 17 that is open in the shape of an inverted C of the female locking member, and pushes the tip leg 17 outward in both directions. The engagement of the engaging portion 16 of the male locking member and the engaging portion 15 of the female locking member is released by the movement of the distal leg portion 17 opening outward. When the release key is pushed further after the unlocking operation, the semicircular inner protrusion 21 of the release key advances further inward than the corner of the male lock member 8, and the semicircular shape of the release key. The inner projection is completely fitted into the semicircular recess 26 having the same size as the inner projection. When this insertion operation is completed, the release key cannot proceed any further.

  Next, when the release key is pulled out, the male lock member 8 is integrated with the release key by the above-mentioned insertion operation, and is thus pulled rightward together with the release key. Returning to FIG. 2, this moving operation is performed until the end face 37 of the male locking member comes into contact with the two beams 38, 38 'provided inside the case. When abutting against the beams 38, 38 ', the inner protrusion 21 of the tip 20 of the release key, which is a projectile body, comes out of the recess 26 of the male lock member, and thereafter only the release key is shown in FIG. So as to be pulled out in the outward direction.

  In contrast to the above-described unlocking, the lock is performed by manually pushing in the lock pin 10 that is integrated with the male lock member and extends outward in the rear of the case in FIG.

The operation when the lock mechanism is used for the self-sounding article monitoring tag is as follows. In FIG. 1B, reference numeral 7 denotes a power switch of the self-sounding alarm circuit, which is turned on when the locking mechanism is locked, and the self-sounding alarm circuit is turned on. When the self-sounding alarm circuit is turned on, the alarm activation switch 12 that is short-circuiting the input of the buzzer sounding circuit (oscillation circuit) is turned on, or the alarm generating radio wave receiving circuit built in the circuit is connected to the receiving circuit. Activated by radio wave input and alarm sounds. An example of the self-sounding alarm circuit has already been proposed as re-published WO 00/31703.

  Two protrusions 29 and 30 are provided on the upper surface of the male lock member of the locking mechanism, and the protrusions are provided on the operating piece 19 of the power switch (slide switch) 7 as shown in FIGS. It comes into contact when locked or unlocked. Thus, the power switch is turned on when locked, and the power switch is turned off when unlocked. When the product is sold normally, at the entrance counter of the store, the store clerk unlocks the self-sounding tag with the release key and removes it from the product and delivers only the product to the customer. Never do.

The proposed locking mechanism is a small and lightweight mechanism that enables reliable locking, but is provided on the front side of the lock pin on the rear side of the boat-type case 1 in FIG. 1 (d). A thin rod such as a toothpick is inserted through the holes 10 ') on both sides, and the tip leg 17 that is open in the shape of an inverted C of the female locking member is pushed outward on both sides to open the male There is a risk of releasing the lock by releasing the lock with the mold locking member, and there is a risk that the lock will be released, and there is a risk that the release key will be stolen or a similar shape will be made to release the lock there were.
JP 7-272139 A JP-A-7-129866 Japanese Patent Laid-Open No. 7-65253 JP 9-328184 A Japanese Patent Laid-Open No. 11-11566

  The present invention relates to an improvement of a conventionally proposed lock mechanism and its release device, and uses a light transmission type material for the release key, and transmits the infrared light to the release key to transmit the infrared light in the tag. The power of the self-sounding tag is released by causing the light receiving element to receive light.

  In order to solve the above-described problem, a power release device for a self-sounding article monitoring apparatus according to the present invention is a self-sounding article monitoring apparatus in which a power source is turned on during use and turned off by a release key. It is made of a light transmissive material, and a control light signal is transmitted through the release key in a state where the release key is inserted into the release hole of the self-sounding article monitoring device, and the transmitted control signal is When the light receiving element provided in the self-sounding article monitoring apparatus receives light, the power of the self-sounding article monitoring apparatus is turned off.

  Furthermore, an automatic return type switch for a control circuit for turning off the power is provided inside the tip of the release hole of the self-sounding article monitoring device, and when the release key is inserted into the release hole The control circuit for turning off the power by the optical signal is put into a standby state by turning on the automatic return switch for the control circuit by the tip of the release key.

Further, the power switch for turning on the power supply during use also serves as a product detection switch.
Further, the control circuit includes a microcomputer, and issues a warning when a product detection switch is turned off in the power-on state or when a gate radio wave is received in the power-on state.

Furthermore, when the release key has a bifurcated shape and the actuator of the automatic return switch for the control circuit that turns off the power at the tip of one leg of the release key is turned on, the tip of the other leg Is in contact with the wall in the case of the self-sounding article monitoring device so that it cannot be pushed any further.

  Still further, an insertion receiving portion for the release key having an inverted C-shaped open leg portion is provided in the case for the self-sounding article monitoring device, and the automatic reset switch for release is provided at the back of the insertion receiving member. It is provided.

  The power release device for the self-sounding article monitoring apparatus of the present invention controls the power release of the self-sounding article monitoring apparatus using infrared rays with the above configuration, and the power can be easily released only by inserting a light transmission type release key. Since it can, the structure is simple and there are few failures.

  Further, the conventional locking mechanism is not required, and if the locking mechanism is eliminated as shown in the preferred embodiment, the locking mechanism is not broken, and the reliability of the tag is increased. Further, since the power release control signal is appropriately formed by a combination of pulses, the number of key combinations can be prepared as many as necessary depending on the number of combinations of the signals, and the safety of the key release is enhanced. That is, even if the release key is stolen, the tag power cannot be released without knowing the contents of the control signal. At the same time, since there is no infrared control signal transmission circuit, the power cannot be released. Therefore, compared to the conventional case where the power can be released by the mechanical release of the lock, the crime prevention against illegal release is high.

  Furthermore, since you can easily turn off the power, the counter at the store will turn off the power for the time being, remove the tag, then turn on the power and prepare for the next use, so it is easier than the conventional lock type, Tag removal work at the counter during busy hours is simplified compared to the prior art.

  Hereinafter, the present invention will be described in detail based on examples with reference to the drawings.

  FIG. 4 is an overall perspective view of a self-sounding article monitoring apparatus (hereinafter simply referred to as a tag) using the power release device of the present invention. In FIG. 4, reference numeral 41 denotes an affixing type tag having the same shape as the conventional one, and reference numeral 42 denotes a release key made of a light transmitting material (transparent) having the same shape as the conventional release key. Accordingly, the external appearance of FIG. 4 is the same as that of FIG. 1 of the related art, and the product detection switch 12 and the operating piece 14 of FIG.

  When canceling the monitoring state of the tag, the cancel key 42 is coupled to a light emitting diode 43 of an infrared signal generator (not shown), and a control signal for power cancellation is transmitted from the infrared signal generator. When the release key is inserted in the tag, the transmitted light control signal is received by the light receiving element 44 in the tag and input to the control circuit in the tag, and the power of the tag is released by the control signal.

  5 to 7 show preferred embodiments of the power release mechanism portion using the release key of the present invention. FIG. 5 is an enlarged view of the monitoring state release mechanism in the tag, and FIG. 6 is a view of FIG. FIG. 7 shows a perspective view of the release key inserted into the tag.

As shown in FIG. 7, the release key 51 for releasing the power supply is provided at the bottom of the self-sounding article monitoring device housing 45 when the power is released at the counter of the store (when the monitoring state of the tag is released). A release key is inserted into the key insertion holes 58 and 59. A release key receiving portion 57 is provided in the self-sounding article monitoring device housing 45, and the release key receiving portion 57 has elastic insertion receiving portions 46 and 47 opened downward in a reverse letter C shape. It is formed integrally with the receiving portion 57.

  As shown in FIGS. 5 and 6, the distal ends 52 and 53 of the release key guided and inserted into the insertion receiving portions 46 and 47 are located at the innermost end of the release key 51 inside the release key receiving portion 57. It abuts against the wall 56 provided on the surface and stops. At the same time, the tip 52 of the other leg pushes in the automatic return type actuator 54 of the release preparation switch 55 provided in the release key receiving portion 57, and the power release preparation switch 55 of the control circuit is pushed. Turn it on.

  When a light control signal is transmitted from an external control signal transmission circuit (not shown) optically coupled to the release key as shown in FIG. 4 with the release preparation switch 55 turned ON, the light control signal is Received by the receiving circuit of the self-sounding article monitoring device optically coupled to the release key in the case of the self-sounding article monitoring device through the release key, and the power supply control circuit operates as described later in response to the control signal. Turn off the sound-type article monitoring device. The light control signal is preferably infrared because it is not visible to the outside and is difficult to understand for customers, shoplifters and the like. The release key is made of transparent plastic, but may be any other material as long as the control signal (for example, infrared rays) passes through.

  The release key may have a lock structure similar to the conventional lock structure, and the release key may have the same shape. However, the non-lock type tag shown in FIGS. 4 to 7 is more suitable when a new tag (self-sounding article monitoring device) is introduced or when the product is switched at the tag update time. The introduction of a new tag is recommended because of its high convenience.

  The release mechanism can be made more convenient by using release keys of other shapes. For example, the number of release key legs is two in the above embodiment, but may be one, or conversely, three or four may be provided. The effect of providing a plurality of legs is that the leg structure itself becomes a key by changing the interval and thickness of the legs, the cross-sectional shape, and the like.

  In addition, since the structure necessary for optical coupling is only rough alignment and does not require a precise and complicated structure, the structure is simplified, and there is an effect that the structure is strong and hardly broken.

FIG. 8 shows a basic circuit for canceling the power supply of the tag by the infrared signal of the present invention.
Hereinafter, the operation of the circuit of FIG. 8 will be described. FIG. 9 is an explanatory diagram of the ports of the microcomputer used in the circuit of FIG.

As shown in FIG. 8, P20 and P21 are terminals for mode selection (71 and 72), and P22 is an input terminal for a power release signal described later. P23 detects the operation of the S1 switch (61), and P30 is an input terminal for an alarm radio wave of, for example, 8.2 MHz from the receiving circuit (70). P31 is a test terminal, and P32 is a light emission control terminal of the display LED. P33 is a power supply self-holding terminal as will be described later, and BU1 is an output terminal for the buzzer sounding circuit (73). Note that the S1 switch (61) is a tag attachment monitoring switch, for example, the same as 12 in FIG. 1, and is set to the 1 side (upper side) when attached to the product, and the tag is removed from the product. And automatically return to the second side (lower side). Therefore, the buzzer sounds when the tag is illegally removed from the product without resetting the power after setting.
1. Unmonitored state (Power OFF)
When the power is off and S1 (61) is on the 1 side (lower side), the gate of Q3 (FET) 63 is 0 potential, so Q3 (63) is turned off and the gate voltage of Q1 (FET) 64 is the source Q1 (64) does not conduct because of the same potential as the voltage. Accordingly, power is not supplied to the microcomputer and the peripheral circuit.
2. Operation for switching to the monitoring state (power is ON) When a tag is affixed to the product and S1 (61) is on the 2 side (upper side), the gate potential of the FET Q3 (63) is passed through the left side of the diode D3 (52). It rises near the power supply voltage and Q3 (63) is turned ON. When Q3 is turned on, the gate potential of the FET Q1 (64) falls below the source potential, so that Q1 (64) is turned on, power is supplied to each circuit, and the microcomputer (67) operates.

When the microcomputer (67) is operated, the terminal P33 becomes H (3 V) by the program, and this potential is applied to the gate of the FET Q3 (63) from the right side of the diode D3 (62), so that S1 (61) is 1 side. (Lower) The power supply to the microcomputer and peripheral circuits is continued (self-maintained). The state where S1 (61) is held on the second side (upper side) is the monitoring state.
3. The alarm mode S1 (61) has two functions: a power supply start function and a theft monitoring function.

・ Step to issue an alarm When the tag is illegally removed and S1 (61) becomes 1 side (downside), the program detects that the terminal P23 of the microcomputer is changed from H to L, and the tag is Raise an alarm.
4). Cancellation by the infrared remote controller Normally, since S2 (66) is OFF, the PTH1 (far infrared receiver) 65 is not turned ON, so that the transistor Q6 (68) is turned OFF and the microcomputer terminal P22 is fixed at the L level.

In order to reset the tag (TAG), a release key is entered from the outside, and far infrared rays including release data are transmitted.
・ Operation details Turn on S2 (66) by entering the release key. S2 (66) is the power release preparation switch 55 shown in FIGS.

↓
A far-infrared control signal (pulse train signal) is transmitted from the release key.
↓
PTH1 (65) is turned on when the far infrared ray enters.

↓
When PTH1 (55) is turned on, the base potential of Q6 (68) falls below the emitter potential, so Q6 (68) is turned on and the microcomputer terminal P22 is set to H. When PTH1 (65) is turned off, the base and emitter of Q6 are at the same potential and Q6 is turned off. This P22 repeating H and L is replaced with a pulse as a release signal.

  When the release signal is identified by the microcomputer and a predetermined combination of pulse trains is input as a control signal, the microcomputer 67 outputs a power-off control signal L to P33. By P33, Q3 (63) and then Q4 (64) are turned off and the power supply is released. If the power is turned off, it will not ring even if the tag is removed. When the tag is attached next time, the operation is the same as described above, and the tag is used repeatedly in this way.

The present invention can be applied not only to the power release device related to the locking mechanism of the self-sounding tag but also to various fields as a simple power supply lock mechanism and its release device. In this case, it is possible to prepare a large number of types of lock mechanisms by preparing different sizes, intervals, numbers and positions of the release key legs, and combining them.

  As the power release device of the self-sounding article monitoring device (self-sounding tag), the present invention has a simple power-release operation and does not mechanically release the power lock as in the prior art. Is high.

  Further, since the power supply is released by an optical signal, a plurality of combinations of control signals can be used, and this change is easy. As a result, the key function becomes more substantial than the conventional one.

Furthermore, if infrared rays are used as the optical control signal, the control signal cannot be seen from the outside, and the confidentiality of the key function is high.
These features make it easy to handle and install self-sounding tags, especially in busy stores, where power can be turned off for the time being and unlocking is not necessary as with conventional tags. Therefore, it contributes to the burden on the store clerk and, consequently, to the increase in sales during busy times, and the utility of the power release device of the present invention is high.

It is a general view of a self-sounding article monitoring tag in which a conventional locking mechanism is used. It is an enlarged view of the part of the lock mechanism of the unlocking state of the self-sounding article monitoring tag. It is an enlarged view of the part of the locking mechanism of the locked state of the self-sounding article monitoring tag. 1 is an overall perspective view of a self-sounding article monitoring apparatus using a power release device of the present invention. It is a figure which shows the Example of the mechanism part of the said power supply cancellation | release by the cancellation | release key of this invention. It is the figure which looked at the Example of the mechanism part of the said power supply cancellation | release by the cancellation | release key of this invention of FIG. 5 from the back side. It is a figure which shows the relationship between the mechanism part of the said power supply cancellation | release by the cancellation | release key of this invention, and a self-sounding article | item monitoring apparatus housing | casing. It is a figure which shows the basic circuit of the power supply cancellation | release of the tag by the infrared signal of this invention. It is explanatory drawing of the port of the microcomputer used for the circuit of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plastic case 2 Release key 3 Printed circuit board 4 Buzzer 5 Battery 6 Long hole 7 Switch 8 Male lock member 9 Female lock member 10 Lock pin 11 Upper cover 12 Snap switch 14 Snap switch operation pieces 15 and 16 Joint portion 17 Leg portion 19 Switch operation piece 20 Tip portion 21 Protrusion 25 Male locking member 26 Recess 29, 30 Protrusion 31 Guide groove 35 Long protrusion 38 Beam 41 Sticking type tag 42 Release key 43 Light emitting diode 44 Light reception Element 51 Release key 52, 53 Leg 54 Actuator 55 Power release preparation switch 57 Receiver 61 Snap switch operation piece 65 Light receiving element 66 Switch 67 Microcomputer 70 Reception circuit 73 Buzzer circuit

Claims (6)

In the self-sounding article monitoring device that turns on the power when in use and turns off the power with the release key,
The release key is made of a light transmissive material, and a control optical signal is transmitted through the release key in a state where the release key is inserted into the release hole of the self-sounding article monitoring device. A power release device for a self-sounding article monitoring apparatus, wherein the light-receiving element provided in the self-sounding article monitoring apparatus receives a control signal to turn off the power of the self-sounding article monitoring apparatus.   An automatic reset switch for a control circuit for turning off the power is provided inside the tip of the release hole of the self-sounding article monitoring device, and the release is performed when the release key is inserted into the release hole. 2. The self-sounding article according to claim 1, wherein the control circuit for turning off the power by the optical signal is put into a standby state by turning on the automatic return switch for the control circuit by the tip of the key. Monitoring device power release device.   3. The power release device for a self-sounding article monitoring apparatus according to claim 1, wherein the power switch for turning on the power supply in use also serves as a commodity detection switch.   2. The control circuit according to claim 1, wherein the control circuit includes a microcomputer and issues a warning when a product detection switch is turned off in the power-on state or when a gate radio wave is received in the power-on state. The power release device of the self-sounding article monitoring device according to any one of?   The release key has a bifurcated shape, and when the actuator of the automatic return switch for the control circuit that turns off the power at the tip of one leg of the release key is turned on, the tip of the other leg 3. The power release device for a self-sounding article monitoring device according to claim 2, wherein the power-release device of the self-sounding article monitoring device according to claim 2, wherein the power-release device is in contact with a wall within the housing of the sounding-type article monitoring device and cannot be pushed further.   An insertion receiving portion for the release key having a reverse-shaped open leg portion is provided in the self-sounding article monitoring device housing, and an automatic return type switch for release is provided at the back of the insertion receiving member. The power release device for a self-sounding article monitoring device according to claim 2 or 5, wherein