JPH11202769A - Opening/closing detection element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening/closing detection element capable of performing attaching work even inside a tightly sealed case body where the hand can not be put in and being easily applied even to case bodys of different dimensions. SOLUTION: For this opening/detection element SE1, when a lid 26 is opened from the case body 24, a conductor 41 is pulled through an attaching guide body 43 fixed to the lid 26. Since the conductor 41 is retained through terminals 37 and 39 to the terminal retaining part 35 of the case body 24, and if the length becomes insufficient, it is disconnected or the terminals 37 and 39 are detached from the terminal locking part 35, a closed state is switched to an open state and the opening of the lid 26 from the case body 24 is detected. The opening/closing detection element SE1 is attached to the case body 24 and the lid 26 by guiding the attaching guide body 43 of a magnetic body to the lid 26 by an electromagnet and fixing the attaching guide body 43 to the lid 26 by an adhesive member 45 at the time of fitting the lid 26 to the case body 24 and thigtly sealing it and it is attached even to the inside of the tightly sealed case body when the hand can not be put in.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents unauthorized alteration of a device in a housing by detecting and storing that fact when a sealed housing containing a predetermined device is opened. Regarding the open / close detection element provided in the sealing device of the housing to prevent, for example, housing a housing for electronic devices provided for pachinko gaming machines, spinning-type gaming machines, etc., and housing meters for electricity, gas, water, etc. The present invention relates to an opening / closing detection element suitable for detecting unauthorized opening of a housing to be opened.

[0002]

2. Description of the Related Art Conventionally, an electronic device used for controlling the operation of a pachinko game machine, a turning game machine, or the like is housed in a predetermined housing. Means that the opening can be detected in the casing so that it will not be tampered with after shipment,
For example, it is shipped with a seal paper that once peeled off indicates that it has been peeled off, a sealing device that detects opening, and the like.

As a sealing device for detecting the opening, the present applicant has proposed a sealing device for a housing (Japanese Patent Laid-Open No. 9-34365). In this case sealing device, when the case is opened, the contact type sensor is opened, the opening of the case is detected, the flip-flop is set, and the fact is stored. The contact-type sensor and the flip-flop are always supplied with power from an internal power supply, so that detection and storage operations can be continued even when external power is cut off. Then, by supplying power from the outside, the oscillator, the frequency divider, and the display output circuit are operated, and the display signal is generated using the frequency-divided signal obtained by dividing the signal from the oscillator by the frequency divider. , Make the light emitting diode blink. This blinking pattern is switched according to the output of the flip-flop.

Therefore, according to the sealing device for a housing, it can be quickly confirmed from the blinking state of the light emitting diode whether or not the housing has been opened. In addition, by connecting the output terminal that outputs the display signal to the hall computer, the display signal can be stored in the hall computer.
It is possible for the administrator to monitor the opening of the housing.

[0005] In the sealing device for a housing described above, the contact type sensor serving as an opening / closing detection element has a fixed contact mounted on one housing (a housing on which the body of the sealing device is mounted together with the electronic device). If the movable contact is attached to the other housing (a housing serving as a lid with respect to the housing on the fixed contact side) and both housings are sealed, the fixed contact and the movable contact are The fixed contact and the movable contact are separated from each other and are electrically disconnected when both the housings are opened when they come into contact with each other and become electrically conductive. When both casings are opened, the state is switched from the conductive state to the cutoff state, the flip-flop is set, and the open / closed state is stored.

A contact type sensor having such a configuration is
Although the opening of the housing can be reliably detected, the following situation may occur. In order to operate this contact-type sensor, it is necessary to make the movable contact and the fixed contact abut, but the size of the housing that houses the electronic device of the pachinko gaming machine differs depending on the manufacturer. Therefore, it has been necessary to re-form or adjust the contact-type sensor according to the difference between manufacturers.

[0007] As described above, the contact-type sensor has to be re-formed or adjusted for each housing, so that the production is troublesome. However, the sensor used in the sealing device that detects the opening of the housing must be made to operate reliably when the housing is sealed and opened, and has a configuration that is not easily tampered with. It is necessary to provide a sensor which can be replaced by the above-mentioned contact type sensor because it is difficult to perform the mounting work in this state after the casing has been once sealed and the hand cannot be put into the casing. It was difficult.

Accordingly, the present invention provides an open / close detection element that can easily and accurately confirm that a casing has been illegally opened. It is still another object of the present invention to provide an open / close detection element that can be easily applied to housings having different dimensions.

[0009]

Means for Solving the Problems, Embodiments of the Invention and Effects of the Invention In order to achieve the above object, the open / close detection element according to claim 1 is provided by housing a predetermined device and closing the cover. An open / close detection element that is disposed in a sealed housing and that opens and closes a pair of contacts fixed to the housing side when the lid is opened, thereby detecting that the lid has been opened, An opening / closing member for opening and closing a contact, a mounting member of a magnetic body displaceably locked to the opening / closing member, and a mounting member capable of fixing the mounting member to the lid. I do.

In the opening / closing detection element according to the first aspect, when the lid is opened from the housing, the opening / closing member fixed to the lid via the mounting member and the mounting member is pulled to open and close the pair of contacts. In other words, the pair of contacts change from the open state to the closed state,
Alternatively, the state changes from the closed state to the open state. Therefore,
The open / close detection element can detect that the lid is opened from the housing based on the open / close state.

Here, a method of attaching the opening / closing detection element according to claim 1 to a housing and a lid will be described. First, in a state where the lid is opened from the housing, each of a pair of contacts,
The opening / closing member is fixed to the mounting conductor. Next, the lid of the housing is fitted. Then, the electromagnet is brought close to the mounting dielectric from above the lid, and the mounting dielectric is guided to the lid by the magnetic force. At this time, with respect to the opening and closing member, the displaceable mounting dielectric is:
It is attracted to the lid by the magnet while being locked by the opening / closing member. Then, the mounting dielectric is fixed to the lid by the mounting member.

According to the above-described opening / closing detection element, to attach the opening / closing detection element to the housing and the lid, when the lid is attached to the housing and sealed, an electromagnet guides the mounting derivative of the magnetic material to the lid. However, since the mounting member is fixed to the lid with the mounting member, the mounting member can be mounted even in a sealed and inaccessible housing.

By the way, various configurations can be used for the mounting member. For example, there are a configuration in which the mounting derivative is bonded to the lid and a configuration in which the mounting derivative is fixed to the lid in advance and the mounting derivative can be fitted. It is preferable to adopt a configuration as described in claim 2 or 3.

That is, as described in claim 2, the mounting member is an adhesive member fixed to the mounting dielectric and bonding the mounting dielectric to the lid. As described in the above, the mounting member may be a fitting member fixed to the lid and formed with a fitting groove in which the mounting derivative can be fitted.

According to the opening / closing detection element of the second aspect, the mounting derivative is bonded to the lid by the bonding member and fixed. Therefore, if the bonding member is in contact with the lid, the mounting derivative is fixed to the lid. Therefore, the attachment derivative can be attached to an arbitrary place, and in addition, attachment is easy.
According to the opening / closing detecting element of the third aspect, when the mounting member is fitted into the fitting groove of the fitting member, the fitting member is fixed to the lid in advance, so that the mounting member is fixed to the lid. Is done. Since the fitting member according to claim 3 has the fitting member fixed to the lid in advance, compared with the adhesive member according to claim 2,
The attachment derivative can be more firmly fixed to the lid.

It is preferable that the above-mentioned open / close detecting element can be applied to housings having different dimensions. According to a fourth aspect of the present invention, in the opening / closing detection element according to the second aspect, the opening / closing member is a conductive wire whose end is in contact with each of the contacts, and the length of the conductive wire is equal to the length of the lid. When is closed, while the middle part of the conducting wire is locked to the lid by the mounting conductor, both ends of the conducting wire are formed to a length connecting the respective contacts, and When the lid is opened, the conductive wire is broken, or both ends of the conductive wire are formed to have a length detached from the contact.

According to a fifth aspect of the present invention, in the opening / closing detection element according to the third aspect, the opening / closing member is a conductive wire having an end contacting each of the contact points, and the length of the conductive wire is equal to the length of the housing. When the lid is closed, both ends of the conductive wire are formed to a length that connects the respective contacts while the intermediate portion of the conductive wire is locked to the lid by the mounting conductor, and When the lid is opened from the body, the conductive wire is disconnected, or both ends of the conductive wire are formed so as to be separated from the contact.

According to a sixth aspect of the present invention, in the opening / closing detection element according to the second aspect, the opening / closing member is two conductors whose ends are in contact with the mounting conductor and each of the contacts. When the lid is closed in the housing, the length is formed to be a length connecting the mounting dielectric and each of the contacts, and when the lid is opened from the housing. Is characterized in that the conductive wire is broken or both ends of the conductive wire are formed in such a length that they are separated from the respective contacts or the mounting conductor.

In the opening / closing detection element according to the fourth or fifth aspect, when the lid is opened from the housing, the conductor connecting the pair of contacts is pulled, and the length of the conductor becomes insufficient, resulting in disconnection. Alternatively, since both ends of the conductor are separated from the contact, the state changes from the closed state to the open state. Therefore, the open / close detection element can detect that the lid has been opened from the housing based on the change from the closed state to the open state.

Further, in the opening / closing detecting element according to claim 6,
When the lid is opened from the housing, the two conductors connecting each contact and the mounting conductor are pulled, and the length of the conductor is insufficient, and the conductor is disconnected, or both ends of the conductor are each contact or Since it is detached from the attached derivative, it changes from the closed state to the open state. Therefore, the open / close detection element can detect that the lid is opened from the housing.

Here, a method of attaching the open / close detection element according to the fourth and fifth aspects to the housing and the lid will be described. First, in a state where the lid is opened from the housing, both ends of the conductive wire are connected to respective contacts while the middle portion of the conductive wire is locked by the mounting dielectric. Next, a lid is attached to the housing. Then, the electromagnet is brought close to the mounting dielectric from above the lid, and the mounting dielectric is guided to the lid by the magnetic force. When the mounting member is an adhesive member as described in claim 4, the mounting member is fixed to the lid by bringing the adhesive member close to the lid and bonding the lid. Further, when the mounting member is a fitting member as described in claim 5, the mounting derivative is guided and fitted into the fitting groove by a magnet, and the mounting derivative is fixed to the lid.

Here, a method of attaching the opening / closing detection element according to claim 6 to a housing and a lid will be described. First, in a state where the lid is opened from the housing, each of the two conductors is connected to the mounting conductor and each contact. Then, the lid is attached to the housing. Then, the electromagnet is brought close to the mounting dielectric from above the lid, and the mounting dielectric is guided to the lid by the magnetic force. Then, the attaching member is fixed to the lid by bringing the adhesive member attached to the attaching member close to the lid and adhering.

According to the opening / closing detecting element according to the fourth, fifth, or sixth aspect described above, when the size of the housing and the lid, that is, the distance between the housing and the lid is large, the conducting wire is connected. When the length is long and the size of the housing and the lid is small, it can be dealt with by shortening the conducting wire. As a result, even if the dimensions of the housing and lid differ depending on the manufacturer,
It can be easily applied simply by adjusting the length of the conductor, which is easy to process, according to the dimensions.

Further, when the lid is opened from the housing, the conductor is always disconnected or both ends of the conductor are separated from the contacts, so that the device cannot be returned to the initial state. Therefore, a person who attempts to open the casing illegally falsifies the opening / closing detection element by some method so that the user cannot understand the opening of the casing, and then attempts to falsify a predetermined device inside the casing. Is difficult.

According to a seventh aspect of the present invention, in the opening / closing detecting element according to the second aspect, the opening / closing member is a conductive wire made of a magnetic material having an end contacting each of the contact points, and the mounting conductor is connected to the connecting member. The conductor is formed by coiling a central portion thereof, and the length of the conductor is formed such that both ends of the conductor connect the respective contacts when the lid is closed to the housing. In addition, when the lid is opened from the housing, both ends of the conductive wire are formed to have a length detached from each of the contacts.

In the opening / closing detecting element according to the present invention, when the lid is opened from the housing, the conductor connecting the pair of contacts is pulled, so that the length of the conductor is insufficient, and both ends of the conductor are separated from the contacts. Therefore, the state changes from the closed state to the open state. Therefore,
The open / close detection element can detect that the lid has been opened from the housing based on the change from the closed state to the open state.

Here, a method of attaching the opening / closing detection element according to claim 7 to a housing and a lid will be described. First, in a state where the lid is opened from the housing, both ends of the conductor are connected to each contact. Next, a lid is attached to the housing. And
An electromagnet is brought close to the mounting dielectric formed by forming a part of the conductive wire into a coil from above the lid, and the mounting dielectric is guided to the lid by the magnetic force. Then, the attaching member is fixed to the lid by bringing the adhesive member attached to the attaching member close to the lid and adhering.

According to the opening / closing detecting element according to the seventh aspect described above, the same effect as that of the opening / closing detecting element according to the fourth or sixth aspect is obtained, and furthermore, the mounting derivative is formed of a conductive wire made of a magnetic material. Since the parts are formed, there is no need to separately provide an attachment derivative, and the configuration can be simplified.

According to an eighth aspect of the present invention, in the opening / closing detection element according to the second aspect, the opening / closing member is a string having one end fixed to the mounting conductor, and the contact is provided at a movable portion at the other end of the string. And a fixed contact provided in the movable range of the movable contact, wherein the length of the cord is such that when the lid is closed to the housing, the movable contact is The movable contact is formed to have a length that does not touch the fixed contact, and when the lid is opened from the housing, the movable contact is pulled so that the movable contact touches the fixed contact. It is characterized by having.

According to a ninth aspect of the present invention, in the opening / closing detection element according to the second aspect, the opening / closing member is a string having one end fixed to the mounting conductor, and the contact is connected to a movable portion at the other end of the string. And the fixed contact provided in the movable range of the movable contact, the length of the cord, when the lid is closed to the housing, the movable contact is Formed to a length that touches the fixed contact, and
When the lid is opened from the housing, the movable contact is pulled so that the movable contact is formed so as not to touch the fixed contact.

In the opening / closing detection element according to claim 8 or 9, when the lid is opened from the housing, the string is pulled via the mounting dielectric attached to the lid, and the opening / closing detection element according to claim 8 In the case of (1), the movable contact moves and comes into contact with the fixed contact, so that the pair of contacts changes from the open state to the closed state. In the case of the open / close detection element according to claim 9, one end of the string is fixed. When the movable contact moves away from the fixed contact,
The pair of contacts changes from the closed state to the open state. Therefore, the opening / closing detection element can detect that the lid has been opened from the housing.

Here, a method of attaching the detecting means of the casing sealing device to the casing and the lid according to claim 8 or 9 will be described. First, in a state in which the lid is opened from the housing, one end of the string is already fixed to the mounting conductor, and the other end is fixed to the movable contact. Next, a lid is attached to the housing. Then, the electromagnet is brought close to the mounting dielectric from above the lid, and the mounting dielectric is guided to the lid by the magnetic force. The attachment derivative is fixed to the lid by bonding the adhesive member attached to the attachment derivative to the lid.

According to the opening / closing detecting element according to claim 8 or 9 described above, the size of the housing and the lid, that is,
If the distance between the housing and the lid is large, lengthen the string,
When the size of the housing and the lid is small, it can be dealt with by shortening the string. As a result, even in the case where the dimensions of the housing and the lid are different due to the difference in the manufacturer, the present invention can be easily applied only by adjusting the length of the conductor, which is easy to process, according to the dimension.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An open / close detecting element according to an embodiment of the present invention will be described below. FIG. 1 shows an electronic device 20 to which a sealing device 1 having an open / close detection element SE1 according to the first embodiment is attached, and a housing 24 and a lid 26 that house the electronic device 20.
It is a perspective view of. It should be noted that a part of the lid 26 is omitted so that the internal electronic device 20 can be seen.

The sealing device 1 is mounted on an electronic device 20 which is incorporated in a pachinko gaming machine (not shown) and controls the operation of the pachinko gaming machine.
And a lid 26 is attached to the housing 24 and hermetically sealed. Here, before describing the opening / closing detection element SE1 and the sealing device 1 having the opening / closing detection element SE1, the electronic device 20 will be described.

The electronic device 20 has an electronic circuit board 22 with an RO
M and other control functional parts (electronic parts) are assembled, and at the end thereof, a power supply terminal 22a for power supply and an external connection for connection to a pachinko game machine main body or a pachinko parlor hall computer or the like. It is configured by fixing the terminal 22b.

The electronic circuit board 22 is first fixed to the flat casing 24 side, and the electronic circuit board 22
Cover 26 formed in a box shape so as to cover all the functional components except the power supply terminal 22a and the external connection terminal 22b fixed to the
Can be covered. Then, the lid 26 and the housing 24 are joined to each other and sealed.

The lid 26 is made of a transparent resin so that the functional components such as the ROM mounted on the electronic circuit board 22 can be checked from the outside. Then, when the lid 26 is opened from the housing 24 and the main body 1a in which most of the circuit elements described below are resin-molded,
And an opening / closing detecting element SE1 for detecting opening.

Further, regarding the components of the sealing device 1,
This will be described with reference to the perspective view of FIG. The open / close detection element SE1 of the first embodiment is fixed to the electronic circuit board 22 and has a rectangular pedestal portion 31 on which two pins 33 and 34 corresponding to a pair of contacts are erected, and two through holes 35a. Are formed on the terminal locking portion 35, and terminals 37 and 39 are provided at both ends.
And a lead wire 41 having a length slightly more than twice the distance from the lid 26 to the terminal locking portion 35 when the lid 26 is closed by the housing 24, and a through hole 43b through which the lead wire 41 passes. It has a cut-and-raised portion 43a formed, and a mounting member 43 of a magnetic material formed in a disk shape, and both surfaces are adhesive surfaces, the mounting derivative 43 is bonded on one surface, and the lid 26 is formed on the other surface.
And an adhesive member 45 for adhering the adhesive. In addition,
The through hole 35a of the terminal locking portion 35 is formed in a size capable of locking the pins 33 and 34 and the terminals 37 and 39, respectively. The two pins 33 and 34 are connected to the terminals T of the main body 1a.
2. The electronic circuit board 22 is connected to T5 in a relationship indicated by a chain line A.
Are connected by the conductive pattern.

When the housing 24 is sealed by the lid 26, the mounting conductor 43 is fixed to the lid 26 via an adhesive member 45, and the open / close detecting element SE1
1 is in a folded state with the terminals 37 and 39 at both ends facing down through the through hole 43b of the mounting dielectric 43. The terminals 37 and 39 at both ends of the conductor 41 are in contact with the pins 33 and 34 via the terminal locking portions 35, and the pins 33 and 34 are connected to the terminals T2 and T5 of the main body 1a. . That is, the pins 33 and 34 are closed contacts.

When the lid 26 is opened from the housing 24 in such a state, the opening / closing detecting element SE1 is attached to the mounting member 4.
The conductive wire 41 passing through the third through hole 43b is pulled. The length of the conducting wire 41 is formed to be a little more than twice as long as the distance when the lid 26 is closed in the housing 24, and shortage occurs immediately, resulting in disconnection, or The terminals 37 and 39 of the conductive wire 41 are detached from the pins 33 and 34, and are switched from a conductive state (closed state) to a cut-off state (open state).

The material of the conductor 41 is, for example,
A copper wire with a thin insulating film, specifically a material that can be cut by external force such as an enamel wire of about 0.1 mm, or a copper wire with an insulating film of appropriate strength, specifically 0.3 mm vinyl Terminals 37 and 39 are pins 33 and 3
4 may be made of a material mainly considering detachment from the material. In addition, the length of the conductive wire 41 is formed to be a little more than twice as long as the distance when the lid 26 is closed in the housing 24.
When the lid 26 is sealed in the housing 24, the conducting wire 41 is disconnected, or the terminals 37 and 39 are connected to the pins 33 and 34.
From the case 24 and the cover 2
When the wire 6 is opened, the conductive wire 41 is disconnected, or the terminal 37 and 39 are always separated from the pins 33 and 34, which means an optimum length. Further, the meaning of “strong”, which is more than twice as long as the length of the conductive wire 41, is the case 2
4. When the lid 26 is sealed to the
7 and 39 are length play provided to prevent the pins 7 and 39 from coming off the pins 33 and 34.

Next, a power supply terminal 22 is provided outside the main body 1a via a conductive pattern formed on the electronic circuit board 22.
a terminals T1, T for connection to a DC power source made from
2, a terminal T3 for connecting to the external connection terminal 22b,
T4, a terminal T5 for connecting to the pin 34 of the open / close detection element SE1, and a light emitting diode LED1 and a speaker 7 for displaying and outputting whether or not the lid 26 has been opened from the housing 24 when external power is turned on. Provided. In addition,
The terminal T2 also serves as a terminal for connecting to the pin 33 of the open / close detection element SE1. Terminals T1 and T2 are terminals for supplying an external power supply. An external power supply (DC voltage) Vcc is applied to one terminal T1, and the other terminal T2
Are grounded to a ground line (GND). The terminals T3 and T4 are terminals for external output, and are connected to a hall computer or the like.

FIG. 3 shows a circuit configuration of the main body 1a.
This will be described with reference to FIG. The main body 1a mainly includes a storage circuit 2, a power supply IC 3, an oscillator 4, a frequency divider 5, and a display / output circuit 6. The power supply IC 3 adjusts the external voltage input through the terminal T1 to a stable constant voltage.

The storage circuit 2 includes the above-described open / close detection element SE1.
When the detection that the lid 26 has been opened from the housing 24 is performed, this is stored. The storage circuit 2 includes a diode D1 for preventing backflow from the power supply IC3.
, A large-capacity capacitor C1 composed of an electric double-layer capacitor is connected as an internal power supply that is charged when the external power supply is turned on, and the positive pole of the capacitor C1 has a source of a field effect transistor (FET) 8 and a resistor R5. Are connected. Further, the other end of the resistor R5 is connected to the gate of the FET 8 and the pin 34 connected to the open / close detection element SE1 via the terminal T5. The open / close detection element SE1 is grounded from the pin 34 to the terminal T2 (ground line) via the conductor 41 and the pin 33. The drain of the FET 8 is connected to a capacitor C2 and a resistor R1 of a large electric double layer corresponding to a storage element via a backflow preventing diode D2, and the other end of each of the capacitor C2 and the resistor R1 is grounded. Connected to line. FE
T8 is an n-channel depletion type (normally-on type). The resistor R5 has a large resistance so that the charged electric charge of the capacitor C1 can be maintained for a long time.

In the storage circuit 2, when electric charge is stored in the capacitor C1 in response to a constant voltage from the power supply IC3 generated when the external power supply is turned on, the electric charge of the capacitor C1 is changed to the resistance R5 , Open / close detection element SE
1. A flow called a ground line is formed, and a reverse bias is applied between the gate and the source of the FET 8 due to the voltage drop of the resistor R5, thereby cutting off the source and the drain. In such a state, when the lid 26 is opened from the housing 24 as described above, the open / close detection element SE1 changes from the conductive state due to the disconnection of the conducting wire 41 or the detachment of the terminals 37 and 39 from the pins 33 and 34. Switch to cutoff state. Then
When the open / close detection element SE1 is turned off, the resistance R5
Voltage drop is eliminated. That is, since the potential difference between both ends of the resistor R5 disappears, the FET 8 is switched from the reverse bias state to the reverse bias state.
The state is switched to the state without bias, and the state between the source and the drain is switched from the cutoff state to the conduction state. Then, the charge of the capacitor C1 passes through the diode D2 and is charged in the capacitor C2.

The electric charge charged in the capacitor C2 is discharged through the gate of the FET 6a described later and the resistor R1. The time (storage time) until the discharge is completed is determined by the gate of the FET 6a and the resistor R1. Since the current flowing through the gate of the FET 6a is as small as about 1 nA and the discharge is negligible, the discharge time actually depends on the resistance value of the resistor R1. For example, when the resistance R1 is 20 MΩ and the capacitance of the capacitor C2 is 0.022F, 0.022 × 2 × 10 ⁷
Electric charge can be stored only during the period of “122 hours ≒ 5 days”. Of course, long-term storage can be performed with a capacitor having a smaller capacity except for the resistor R1.
Since the storage time is determined by the current flowing through the gate 6a, the storage time varies due to a change in temperature or the like, which is not preferable.

Next, the oscillator 4 operates by receiving a constant power supply from the power supply IC 3 generated when the external power supply is turned on, and oscillates at a predetermined frequency. The frequency divider 5 frequency-divides the signal from the oscillator 4 and outputs three types of frequency-divided signals S1, S2, and S3. That is, the frequency divider 5
Together with the oscillator 4 constitute a timer circuit for measuring the time after the external power is turned on. When the power is turned on and the operation is started, the frequency divider 5 starts a frequency-divided signal after a lapse of a predetermined time corresponding to the frequency-divided value. Then, after the external power is turned on, the frequency division signals S1, S2, and S3 having a duty ratio of 50% are generated. In this embodiment, the frequency-divided signal S1 is 8 Hz and S2 is 1H.
z and S3 are set to 1024 Hz.

When the external power supply is turned on, the display / output circuit 6
A display signal is generated according to whether or not electric charges are stored in the capacitor C2 in the storage circuit 2 (in other words, whether or not the lid 26 is opened from the housing 24), and the display signal in the housing is generated. A certain light emitting diode LED1 is turned on and off, a display signal is output to the outside via the terminals T3 and T4, and an output signal for notifying the opening is generated and transmitted from the speaker 7. The display / output circuit 6 has a gate connected to the positive electrode of the capacitor C2, a drain connected to the power supply IC3 via the resistor R2, a source connected to the ground line, a drain of the FET 6a and a frequency divider. 5, a NAND circuit 6b connected to the output terminal of the frequency-divided signal S2, an AND circuit 6d connected to the drain of the FET 6a and the output terminal of the frequency-divided signal S3 of the frequency divider 5, and an output terminal of the NAND circuit 6b. An AND circuit 6c connected to an output terminal of the frequency-divided signal S1 of the frequency divider 5;
A speaker 7 having one end connected to the output terminal of the AND circuit 6d and the other end grounded to a ground line;
A light emitting diode LED connected to the output terminal of the circuit 6c via a resistor R3 and the other end grounded to a ground line;
1 and a photorelay PR whose one end is connected to the output terminal of the AND circuit 6c via a resistor R4 and whose other end is grounded to a ground line. The output of the photo relay PR is connected to terminals T3 and T4. The FET 6a is a P-channel depletion type (normally-on type).

In the display / output circuit 6, when the external power is turned on, the oscillator 4 and the frequency divider 5 operate, and the frequency divider 5 outputs frequency-divided signals S1, S2, S3, When no charge is stored in the capacitor C2 as a storage element, that is, when the lid 26 is not opened from the housing 24, there is no potential difference between the gate and the source of the FET 6a, that is, no bias is applied. , And between the drain and source of the FET 6a. Therefore, the current flowing from the power supply IC 3 flows to the ground line through the drain and source of the FET 6a.
An L level signal is input to one end of the circuit 6b. The frequency-divided signal S2 is input to the other end of the NAND circuit 6b, and an H-level signal is output from the output terminal. Further, the H level signal of the NAND circuit 6b is input from one end to the AND circuit 6c, and the frequency-divided signal S1 is input from the other end, so that the frequency-divided signal S1 is output from the output terminal to the light emitting diode LED1 and the photo relay PR. Is output to. As a result, the frequency-divided signal S1 is output from the light-emitting diode LED1.
(For example, 8 Hz as described above), and a frequency-divided signal S1 is output from the terminals T3 and T4.

On the other hand, when charges are stored in the capacitor C2, that is, when the housing 24 is opened, a reverse bias is applied between the gate and the source of the FET 6a due to the charges of the capacitor C2, and the drain of the FET 6a is discharged. -The source is shut off. Therefore, each input of the NAND circuit 6b and the AND circuit 6d becomes H level. Further, as described above, the frequency-divided signals S1, S2, S3 are AND
The signals are input to the other ends of the circuit 6c, the NAND circuit 6b, and the AND circuit 6d, respectively. A signal obtained by inverting the frequency-divided signal S2 is output from the output terminal of the NAND circuit 6b.
In the AND circuit 6c, when the divided signal S2 is an L level signal, the divided signal S1 is output to an output terminal, and when the divided signal S2 is an H level signal, an L level signal is output. Is output to That is, a display signal obtained by combining the frequency-divided signals S1 and S2 is output from the AND circuit 6c. For example, in the present embodiment, the divided signal S
8 Hz for 0.5 seconds because 1 and S2 are set
The signal and the L level signal for 0.5 seconds are output alternately. Then, the frequency-divided signal S1 is output from the light emitting diode LED1.
And light emission is performed based on the display signal obtained by combining S2 and S2.
A display signal synthesized in the same manner is output from the terminals T3 and T4. In the AND circuit 6d, the divided signal S3 is connected to the other end.
As a result, a sound based on the frequency-divided signal S3 is output from the speaker 7.

Next, a method of attaching the open / close detection element SE1 of the sealing device 1 of the first embodiment to the housing 24 and the lid 26 will be described. First, in a state in which the lid 26 is opened from the housing 24, either the terminal 37 or the terminal 39 of the conducting wire 41 is passed through the through hole 43b of the mounting conductor 43, and the conducting wire 41 is folded in two at the through hole 43b. So that
Next, the terminals 37 and 39 are fixed to the terminal locking portion 35. Next, the terminals 37 and 39 are fixed together with the terminal locking portions 35 so as to contact the pins 33 and 34. And the attachment derivative 4
3 with the adhesive member 45 adhered to the upper surface of the housing 24.
Cover 26. Next, an electromagnet is brought close to the attachment 43 from above the lid 26, and the attachment 43 is guided to the lid 26 by the magnetic force. An adhesive member 45 attached to the attachment 43 attaches to the lid 26. Further, the magnetic force of the electromagnet is increased, and the adhesive member 45 is fixed to the lid 26 so that the mounting member 43 is completely fixed to the lid 26.

Next, the sealing device 1 prepared as described above
Will be described. It is assumed that an external power supply has already been input and electric charge is stored in the capacitor C1. First, when the lid 26 is sealed in the housing 24, the pins 33 and 3
4 is connected by the conducting wire 41, a reverse bias is applied between the gate and the source of the FET 8, and the source and the
The drain is in a cutoff state, and the capacitor C2 is not charged.

When the external power supply is turned on in this state, the oscillator 4 operates and the frequency divider 5 outputs the frequency-divided signal S.
1 to 3 are sequentially output. Since the capacitor C2 is not charged, no bias is applied between the gate and the source of the FET 6a and the drain and the source are in a conductive state. An H level signal is always output regardless of the peripheral signal S2. As a result, a constant period (8H) corresponding to the frequency-divided signal S1 is output from the output terminal of the AND circuit 6c.
A signal that is alternately inverted in z) is output.

Therefore, the light emitting diode LED1 as the display element in the casing always blinks at a constant cycle, and it can be confirmed from this blinking state that the lid 26 is not opened from the casing 24. Further, if a management device such as a hall computer is connected to the terminals T3 and T4, the hall computer can also detect that the lid 26 has not been opened from the housing 24 based on a display signal of a fixed period.

On the other hand, in a state where the lid 26 is opened from the housing 24, that is, when the conductor 41 is detached from the pins 33 and 34 of the open / close detection element SE1 or when the conductor 41 is disconnected, the connection between the gate and the source of the FET 8 is established. And the source-drain becomes conductive, and the capacitor C2 is charged by the electric charge of the capacitor C1.

When the external power is turned on in this state, since the capacitor C2 is charged,
Since the drain and source of the FET 6a are cut off, a signal obtained by inverting the frequency-divided signal S2 is output from the output terminal of the NAND circuit 6b. From the output terminal of the AND circuit 6c, when the frequency-divided signal S2 is at the L level, a display signal inverted at a constant period corresponding to the frequency-divided signal S1 is output, and the frequency-divided signal S2 is at the H level. When
An L level signal is output. That is, the AND circuit 6c outputs a display signal obtained by synthesizing the frequency-divided signal S1 and the frequency-divided signal S2. The output terminal of the AND circuit 6d outputs the frequency-divided signal S3.

Therefore, the light emitting diode LED1 alternately repeats a blinking state at a period (8 Hz) corresponding to the frequency-divided signal S1 and a constant period (1 Hz) corresponding to the frequency-divided signal S2, and a non-blinking state without blinking. This indicates that the lid 26 has been opened from the housing 24 by this display state. Further, the speaker 7 emits a sound for notifying of opening based on the frequency-divided signal S3. Further, a terminal T3,
If a hole computer is connected to T4, the hole computer can also detect that the lid 26 has been opened from the housing 24 from the inverted pattern of the display signal.

Further, while the external power is turned on, the cover 24 is removed from the housing 24.
6, when the capacitor C is opened as described above.
2 is charged, and the display / output circuit 6 generates a display signal indicating the opened state. In this case, since the oscillator 4 and the frequency divider 5 are already operating, the signals are transmitted through the terminals T3 and T4. Then, the fact that the lid 26 has been opened from the housing 24 is output to a hall computer or the like.

According to the opening / closing detection element SE1 described above, in order to attach the opening / closing detection element SE1 to the housing 24 and the lid 26, when the lid 26 is fitted to the housing 24 and sealed, an electromagnet is used to form the magnetic material. The attachment derivative 43 is guided to the lid 26, and the attachment derivative 43 is adhered to the lid 26 with the adhesive member 45, so that the attachment derivative 43 can be attached even in a sealed and inaccessible housing. The opening / closing detection element SE1 has the size of the housing 24 and the lid 26, that is, the housing 24 and the lid 26.
If the distance between them is large, the conductor 41 can be lengthened, and if the size of the housing 24 and the lid 26 is small, the conductor 41 can be shortened. As a result, even when the dimensions of the housing 24 and the lid 26 differ depending on the manufacturer, the present invention can be easily applied only by adjusting the length of the conductor 41 that is easy to process according to the dimension.

When the lid 26 is opened from the housing 24, the conductor 41 is always disconnected or the terminals 37 and 39 are detached from the pins 33 and 34.
Cannot be returned to the initial state. Therefore, a person who intends to open the casing 24 illegally falsifies the sealing device 1 by some method so that the user cannot understand the opening of the casing 24 and then falsifies the electronic device 20 inside the casing 24. Hard to do.

Next, the open / close detecting element SE2 of the second embodiment
The sealing device 11 having the opening and closing detection element SE2 will be described. The same parts as those in the sealing device 1 are denoted by the same reference numerals, and detailed description thereof will be omitted. Sealing device 11
Is mounted on the electronic circuit board 22 together with the electronic device 20 in the same manner as the sealing device 1, and is sealed with the housing 24 and the lid 26.

The structure of the sealing device 11 is different from that of the sealing device 1, as shown in the circuit diagram of FIG. When detecting that the cover 26 is opened from the housing 24, the detection element SE2 is provided inside the main body 11a.
The storage circuit 12 stores the information, and the display / output circuit 16 provided inside the main body 11a and generating a display signal. The main body 11a has a power input terminal T1 to which an external power Vcc is input, and a ground line (GND).
A terminal T2 for grounding, an external output terminal T3, T4, and terminals T5, T6 for connecting an open / close detection element to which the open / close detection element SE2 is attached.

The open / close detecting element SE2 of the second embodiment is similar to that shown in FIG.
As shown in (a), an L-shaped fixed contact 51 fixed to the electronic circuit board 22 and connected to the terminal T5, and connected to the terminal T6 fixed to the electronic circuit board 22 and pulled upward in the drawing. And an L-shaped movable contact 53 which is bent as shown by a dotted line F, and a cut-and-raised portion 57 in which a through-hole 57b is formed.
a of the magnetic substance formed into a disk shape having a
And one end thereof is passed through the through hole 53a of the movable contact 53, and a fixed member 61 is connected to the one end.
3 and a string 55 having the other end fixed to the through hole 57b of the mounting dielectric 57, and an adhesive member 59 for bonding the mounting dielectric 57 on one surface and bonding the lid 26 on the other surface. I have. The movable contact 53 is bent at an angle so as not to touch the fixed contact 51, and is usually an open contact.

In the open / close detecting element SE2, when the lid 26 is sealed in the housing 24, the movable contact 53 does not touch the fixed contact 51, that is, the cutoff state (open state).
It is in. Then, when the lid 26 is opened from the housing 24, the mounting dielectric 57, the string 55, the movable contact 53
Is pulled. Then, the movable contact 53 moves to the position shown by the dotted line F and comes into contact with the fixed contact 51, that is, a conductive state (closed state).

Further, in order to create such a cut-off or conduction state, the length of the string 55 should be such that the movable contact 53 does not touch the fixed contact 51 when the lid 26 is closed in the housing 24. When the cover 26 is opened from the housing 24, the movable contact 53 needs to be pulled to adjust the movable contact 53 to a length that allows the movable contact 53 to contact the fixed contact 51. The string 55 is preferably made of a material that is thin, soft, and hard to be cut, for example, a twisted wire obtained by twisting a very thin stainless wire.

Next, a method of attaching the open / close detection element SE2 to the housing 24 and the lid 26 will be described. First, the housing 24
In the state where the lid 26 is opened, one end of the string 55 is fixed to the mounting dielectric 57 having the adhesive member 59 adhered to one surface, and the other end is fixed to the movable contact 53 by the fixing member 61. Keep it. Next, the lid 26 is fitted to the housing 24. Then, the electromagnet is brought close to the mounting dielectric 57 from above the lid 26, and the mounting dielectric 57 is guided to the lid 26 by the magnetic force. Adhesive member 5 attached to attachment dielectric 57
9 adheres to the lid 26. Further, the magnetic force of the electromagnet is strengthened so that the adhesive member 59 is fixed to the lid 26 so that the mounting member 57 is completely fixed to the lid 26.

The storage circuit 12 is connected to a capacitor C1 as an internal power supply which is charged when the external power supply is turned on from a power supply IC3 via a diode D1 for preventing backflow, and a plus terminal of the capacitor C1 is connected to a terminal T6. Is connected to the movable contact 53 of the open / close detection element SE2.
The fixed contact 51 of the open / close detection element SE2 is connected to the capacitor C2 and the resistor R1 of the large electric double layer via the terminal T5 and the diode D2, and the other end of each of the capacitor C2 and the resistor R1 is connected to the ground line. Connected to.

The display / output circuit 16 includes the AND circuit 6d and the speaker 7 from the display / output circuit 6 of the first embodiment.
Is removed. Next, the operation of the sealing device 11 configured as described above will be described. It is assumed that an external power supply has already been input and electric charge is stored in the capacitor C1.

First, when the lid 26 is sealed in the housing 24, the movable contact 53 of the open / close detecting element SE2
Is in a state of not touching the fixed contact 51, the open / close detection element SE2 is in the cut-off state, and the capacitor C2 is not charged. Then, when an external power supply is input in this state, the light emitting diode LED1 is, like the sealing device 1,
It blinks at a constant cycle, and it can be confirmed from this blinking state that the lid 26 is not opened from the housing 24. Further, even on the side of the hall computer from the terminals T3 and T4, it is possible to detect from the display signal of a fixed period that the cover 26 is not opened from the housing 24.

On the other hand, when the lid 26 is opened from the housing 24, that is, when the movable contact 53 of the open / close detection element SE2 is pulled simultaneously with the opening of the lid 26 and comes into contact with the fixed contact 51, the open / close detection element SE2 is opened. SE2 becomes conductive, and the capacitor C2 is charged by the electric charge of the capacitor C1.

When the external power is turned on in this state, since the capacitor C2 is charged,
Similarly to the sealing device 1, the light emitting diode LED1 alternates between a blinking state with a period (8 Hz) corresponding to the frequency-divided signal S1 and a constant period (1 Hz) corresponding to the frequency-divided signal S2, and a non-blinking state without blinking. The display state confirms that the lid 26 is opened from the housing 24. Further, even on the side of the hall computer from the terminals T3 and T4, the case 2
4 can detect that the lid 26 has been opened.

Further, while the external power is turned on, the cover 24 is removed from the housing 24.
6, when the capacitor C is opened as described above.
2 is charged and the display / output circuit 16 generates a display signal indicating the unsealed state. In this case, since the oscillator 4 and the frequency divider 5 are already operating, the terminals T3 and T4 are connected. Through the cover 24 from the housing 24 to a hall computer or the like.
Outputs that has been opened.

According to the opening / closing detection element SE2 described above, in order to attach the opening / closing detection element SE2 to the housing 24 and the lid 26, when the lid 26 is attached to the housing 24 and the housing 24 is hermetically sealed, a magnetic substance is formed by an electromagnet. The mounting dielectric 57 is guided to the lid 26, and the mounting dielectric 57 is bonded to the lid 26 with an adhesive member 59, so that the mounting dielectric 57 can be mounted even in a sealed and inaccessible housing.

When the size of the housing 24 and the lid 26, that is, when the distance between the housing 24 and the lid 26 is large, the opening / closing detection element SE2 increases the length of the string 55 so that the housing 24 and the lid If the size of 26 is small, it can be dealt with by shortening the string 55. As a result, similarly to the open / close detection element SE1 of the first embodiment, the housing 24 differs depending on the manufacturer.
Even when the dimensions of the lid 26 are different, it can be easily applied simply by adjusting the length of the string 55, which is easy to process, according to the dimensions.

Next, an open / close detecting element SE3 according to a third embodiment will be described. The opening / closing detection element SE3 of the third embodiment functions by being attached to the mounting location of the opening / closing detection element SE1 of the first embodiment instead of the opening / closing detection element SE1. In the opening / closing detection element SE3, the same portions as those of the opening / closing detection element SE1 are denoted by the same reference numerals, and the details are omitted.

As shown in FIG. 6A, the open / close detecting element SE3 includes a pedestal 31 on which pins 33 and 34 are erected, and
A terminal locking portion 35 having a through-hole 35a formed at a location, and a conducting wire 72 having terminals 37 and 71 at both ends and formed to be slightly more than one time the distance when the lid 26 is closed in the housing 24. , Having terminals 39 and 73 at both ends, a conductor 74 similar to the conductor 72
And two through holes 75a are formed in the terminal locking portions 35.
It has a terminal locking portion 75 having the same configuration as the above, two cut-and-raised portions 77a that can be inserted into the through-holes 75a, and has a mounting member 77 of a disk-shaped magnetic material and an adhesive member 45. I have.

The opening / closing detection element SE3 thus configured
Then, the pin 33, the terminal 37, the conductor 72, the terminal 71, the mounting conductor 77, the terminal 73, the conductor 74, the terminal 39, and
The pins 34 form a current conduction path in parallel.
The materials of the conductors 72 and 74 may be the same as those of the open / close detection element SE1 of the first embodiment.

When the lid 26 is opened from the housing 24, the conductors 72 and 74 are pulled, and the lengths of the conductors 72 and 74 become short, and the open / close detection element SE3 is disconnected. , Terminal 37 of conductor 72 and conductor 74
Terminal 39 is detached from the pins 33 and 34. In addition, the terminal 71 of the conductor 72 and the terminal 73 of the conductor 74 are detached from the mounting conductor 77. That is, the conductors 72 and 74
Are detached from the pins 33 and 34 and the mounting dielectric 77. Accordingly, the open / close detection element SE3 changes from the conductive state (closed state) to the cutoff state (open state), and detects that the lid 26 has been opened from the housing 24.

According to the open / close detecting element SE3 of the third embodiment described above, the same effect as that of the open / close detecting element SE1 of the first embodiment can be obtained. Next, the open / close detection element S of the fourth embodiment
E4 will be described. The open / close detection element SE4 of the fourth embodiment is
The opening / closing detection element SE1 according to the first embodiment is attached to a place where the opening / closing detection element SE1 is attached, and functions. In the opening / closing detection element SE4, the same portions as those of the opening / closing detection element SE1 are denoted by the same reference numerals, and the details are omitted.

As shown in FIG. 6B, the open / close detecting element SE4 includes a pedestal 31 on which pins 33 and 34 are erected, and
A terminal locking portion 35 having a through hole 35a formed at one location, a conducting wire 91 having terminals 37 and 39 provided at both ends thereof, a coil-shaped mounting dielectric 93a and two spring portions 93b formed, and one surface. To the lid 26 for attaching the mounting dielectric 93a formed on the conducting wire 91 to the lid 26.
5 is provided. The conducting wire 91 is formed of an iron wire, specifically, a piano wire, the mounting conductor 93a at the center is formed in a flat coil shape so that the adhesive member 45 can be easily bonded, and the spring portion 93b is formed of a conducting wire. 91 is formed so that there is a margin in the longitudinal direction.

When the lid 26 is opened from the housing 24, the conductor 91 is pulled and the length of the conductor 91 becomes insufficient.
9 is disengaged from pins 33 and 34. Accordingly, the open / close detection element SE4 changes from the conductive state (closed state) to the cutoff state (open state), and detects that the lid 26 has been opened from the housing 24.

According to the open / close detecting element SE4 of the fourth embodiment described above, the same effect as the open / close detecting element SE1 of the first embodiment can be obtained. Further, the open / close detection element S of the fourth embodiment
According to E4, since the attachment derivative 93a is formed by making a part of the conductive wire 91 into a coil shape, the attachment derivative 4 is separately provided like the open / close detection element SE1 of the first embodiment.
3 does not need to be provided, and the configuration can be simplified.

Next, an open / close detecting element SE5 according to a fifth embodiment will be described. The opening / closing detection element SE5 of the fifth embodiment functions by being attached to the mounting position of the opening / closing detection element SE1 of the first embodiment instead of the opening / closing detection element SE1. In the opening / closing detection element SE5, the same portions as those of the opening / closing detection element SE1 are denoted by the same reference numerals, and the details are omitted.

As shown in FIG. 6 (c), the open / close detecting element SE5 includes a pedestal 31 on which pins 33 and 34
A terminal locking portion 35 having a through-hole 35a formed at a location, a conductor 41 having terminals 37 and 39 at both ends, and a conductor 4
1 and a recess 103b in the center.
And a rectangular U-shaped fitting groove formed by bending a rectangular member so that the mounting derivative 103 is fixed to the lid 26 and can be fitted thereto. And a fitting member 101. In addition, the fitting member 101 has, at one end, a return portion 101a for preventing the attachment derivative 103 sandwiched between the fitting grooves from coming off,
And a projection 101b provided in the fitting groove.

The opening / closing detection element SE5 thus configured
The method of attaching to the housing 24 and the lid 26 will be described.
It is assumed that the fitting member 101 has a portion corresponding to an upper portion as viewed in the drawing fixed to the lid 26. First, housing 2
In a state where the lid 26 is opened from 4, the terminal 37 of the conductor 41 or the terminal 39 is connected to the mounting conductor 1.
03 through the through hole 103a, and the conducting wire 41
Fold it in two at a. Next, terminals 37, 3
9 is fixed to the terminal locking portion 35. Next, the terminals 37 and 39 are fixed together with the terminal locking portions 35 so as to contact the pins 33 and 34. Then, the lid 26 is fitted to the housing 24. Next, an electromagnet is disposed from above the lid 26 with respect to the mounting member 103, and the mounting member 103 is attached to the fitting member 1 by its magnetic force.
Lead to 01. Further, the electromagnet is moved so that the mounting dielectric 103 is fitted into the fitting groove of the fitting member 101. Then, the attachment derivative 103 is formed in the concave portion 103b with a protrusion 101b.
Will be caught and cannot be separated in the longitudinal direction. In addition, the attachment derivative 103 cannot be detached in the lateral direction due to the return portion 101a. Accordingly, the mounting dielectric 103 is fixed to the lid 26 via the fitting member 101.

The operation of the opening / closing detection element SE5 is the same as that of the opening / closing detection element SE1 of the first embodiment, and a description thereof will be omitted. According to the opening / closing detection element SE5 of the fifth embodiment described above, the same effect as that of the opening / closing detection element SE1 of the first embodiment is exerted. In the opening / closing detection element SE1 of the first embodiment, the adhesive member 45 is used. Although the conducting wire 41 is adhered to the lid 26, in the opening / closing detection element SE5, the fixing of the mounting derivative 103 to the lid 26 is not performed by adhesion but by fitting to the fitting member 101, and the fitting Put the member 101 on the lid 26
The attachment derivative 103 can be more firmly fixed to the lid 26 because it is fixed to the cover 26.

Next, an open / close detecting element SE6 according to the sixth embodiment will be described. The opening / closing detection element SE6 of the sixth embodiment functions by being attached to the mounting position of the opening / closing detection element SE1 of the first embodiment instead of the opening / closing detection element SE1. In the open / close detecting element SE6, the same portions as those of the open / close detecting element SE2 of the second embodiment are denoted by the same reference numerals, and the details are omitted.

As shown in FIG. 5 (b), the open / close detecting element SE6 is fixed to the fixed contact 51 and the electronic circuit board 22 and is connected to the terminal T5. L-shaped movable contact 111, a mounting dielectric 57 having a cut-and-raised portion 57 a formed with a through-hole 57 b, and one end of the through-hole 111 a of the movable contact 111.
And a fixing member 61 is connected to the one end to fix the one end to the movable contact 111, and the other end is fixed to the through hole 57 b of the mounting insulator 57, and a bonding member 59 is provided. In addition, the movable contact 111 is bent at an angle so as to maintain the state in which the movable contact 111 is in contact with the fixed contact 51, and is usually a closed contact.

The opening / closing detection element SE6 thus configured
The method of mounting the sensor on the housing 24 and the lid 26 is the same as that of the open / close detection element SE2 of the second embodiment, and a description thereof will be omitted. In the open / close detection element SE6, when the lid 26 is sealed in the housing 24, the movable contact 111 is in contact with the fixed contact 51, that is, in a conductive state (closed state). Then, when the lid 26 is opened from the housing 24, the attachment 57, the string 55, and the movable contact 111 are pulled by the lid 26.
Then, the movable contact 111 moves to the position shown by the dotted line G, and the movable contact 111 is separated from the fixed contact 51,
In other words, the housing 24 is in the cutoff state (open state),
6 can be detected as being opened.

In summary, the correspondence between the above-described embodiments and modified examples and the claims corresponds to the electronic device 20 corresponding to a predetermined device. The embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and may, of course, be implemented in various embodiments.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a housing 24 and a lid 26 for sealing a sub-circuit board 22 provided with a housing sealing device 1 having an open / close detection element SE1 of the first embodiment.

FIG. 2 is a perspective view showing a casing sealing device 1 having the open / close detection element SE1 of the first embodiment.

FIG. 3 is a circuit diagram showing an electrical configuration of a casing sealing device 1 having an open / close detection element SE1 according to the first embodiment.

FIG. 4 is a circuit diagram showing an electrical configuration of a casing sealing device 11 having an open / close detection element SE2 according to a second embodiment.

FIG. 5A is a front view showing an open / close detection element SE2 of a second embodiment, and FIG. 5B is a front view showing an open / close detection element SE6 of a sixth embodiment.

FIG. 6A shows an open / close detection element SE3 according to a third embodiment;
(B) is a perspective view showing the open / close detecting element SE4 of the fourth embodiment, and (c) is a perspective view showing the open / close detecting element SE5 of the fifth embodiment.

[Explanation of symbols]

1, 11: sealing device, 24: housing, 26: lid, 41, 7
2, 74, 91 ... conductor, 43, 57, 77, 93a, 1
03: mounting derivative, 45, 59: adhesive member, 51: fixed contact, 53, 111: movable contact, 55: string, 101: fitting member, SE1, SE2, SE3, SE4, SE5,
SE6: open / close detection element.

Claims (9)

[Claims] 1. A predetermined device is housed in a housing sealed by closing a lid, and when the lid is opened, a pair of contacts fixed to the housing side is opened and closed to open and close the housing. An opening / closing detection element for detecting that the lid has been opened, an opening / closing member for opening / closing the contact, an attachment derivative of a magnetic body displaceably locked to the opening / closing member, and An opening / closing detection element, comprising: an attachment member capable of fixing the attachment derivative. 2. The opening / closing detection element according to claim 1, wherein the attachment member is an adhesive member fixed to the attachment derivative and attaching the attachment derivative to the lid. 3. The opening / closing detection element according to claim 1, wherein the attachment member is a fitting member fixed to the lid and formed with a fitting groove in which the fitting can be fitted. 4. The opening / closing detection element according to claim 2, wherein the opening / closing member is a conductor whose end is in contact with each of the contacts, and the length of the conductor is such that the lid is closed by the housing. When the middle portion of the conducting wire is locked to the lid by the mounting conductor, both ends of the conducting wire are formed to a length connecting the respective contacts, and the lid is opened from the housing. The opening / closing detection element is characterized in that, when the contact is made, the conducting wire is disconnected or both ends of the conducting wire are formed to have a length detached from the contact. 5. The opening / closing detection element according to claim 3, wherein the opening / closing member is a conductor whose end is in contact with each of the contacts, and the length of the conductor is such that the lid is closed by the housing. When the middle portion of the conducting wire is locked to the lid by the mounting dielectric, both ends of the conducting wire are formed to a length connecting the respective contacts, and the lid is opened from the housing. The opening / closing detection element is characterized in that, when the contact is made, the conducting wire is disconnected or both ends of the conducting wire are formed to have a length detached from the contact. 6. The opening / closing detection element according to claim 2, wherein the opening / closing member is two conductors whose ends are in contact with the mounting insulator and each of the contact points, and the length of the conductor wire is When the lid is closed to the housing, the cover is formed to have a length connecting the mounting conductor and each of the contacts, and when the lid is opened from the housing, the conductive wire is disconnected. Or an opening / closing detecting element, wherein both ends of the conducting wire are formed to have a length detached from each of the contacts or the mounting conductor. 7. The opening / closing detection element according to claim 2, wherein the opening / closing member is a conductive wire made of a magnetic material having an end contacting each of the contact points, and the mounting conductor is configured to coil a central portion of the conductive wire. When the cover is closed in the housing, the length of the conductive wire is formed to a length that connects both ends of the conductive wire to the respective contacts, and the length of the housing is When the lid is opened from the body, both ends of the conductive wire are formed to have a length detached from each contact. 8. The opening / closing detection element according to claim 2, wherein the opening / closing member is a string having one end fixed to the mounting conductor, and the contact is a movable contact having the other end fixed to a movable portion. A fixed contact provided in a movable range of the movable contact, wherein the length of the cord is such that the movable contact touches the fixed contact when the lid is closed to the housing. When the lid is opened from the housing, the movable contact is pulled, and the movable contact is formed to have a length in contact with the fixed contact. Open / close detection element. 9. The opening / closing detection element according to claim 2, wherein the opening / closing member is a string having one end fixed to the mounting conductor, and the contact is a movable contact fixed to the other end of the string at a movable portion. A fixed contact provided in a movable range of the movable contact, wherein the length of the cord is such that the movable contact touches the fixed contact when the lid is closed to the housing. And when the lid is opened from the housing, the movable contact is pulled so that the movable contact does not touch the fixed contact. Open / close detection element.