WO2013080840A1

WO2013080840A1 - Door opening/closing detecting device

Info

Publication number: WO2013080840A1
Application number: PCT/JP2012/080051
Authority: WO
Inventors: 英太郎亀田
Original assignee: 株式会社村田製作所
Priority date: 2011-11-30
Filing date: 2012-11-20
Publication date: 2013-06-06
Also published as: JPWO2013080840A1

Abstract

Provided is a door opening/closing detecting device which is capable of transmitting a radio signal, and has a high degree of freedom in terms of mounting position. A door opening/closing detecting device (1) is a door rotation detecting device mounted on a door (10) which comprises a door main body (11), a first rotation operation member (12a), a second rotation operation member (12b), and a metal rotation shaft (13) which penetrates the door main body (11) and rotates the first rotation operation member (12a) and the second rotation operation member (12b) in conjunction with each other, the first rotation operation member (12a) being connected to one end of the metal rotation shaft and the second rotation operation member (12b) being connected to the other end of the metal rotation shaft. The door opening/closing detecting device (1) comprises a metal rotation member (21), a power generation mechanism (30), and a transmission unit (40). The rotation member (21) is rotated according to a rotation of the rotation shaft (13). The power generation mechanism (30) performs power generation according to a rotation of the rotation member (21). When power is generated by the power generation mechanism (30), the transmission unit (40) transmits a radio signal by using the power generated by the power generation mechanism (30). The transmission unit (40) comprises an antenna terminal. The rotation shaft (13) and the rotation member (21) are electrically connected to each other. The antenna terminal of the transmission unit (40) and the rotation member (21) are electrically connected to each other.

Description

Door open / close detection device

The present invention relates to a door open / close detection device.

In recent years, there has been an increasing demand for security systems that centrally manage the locking and opening / closing operations of building doors and windows from the viewpoint of crime prevention. For example, Patent Document 1 describes an example of a locking confirmation device that is added to a door knob having a locking rotary knob on the front surface and confirms locking. The locking confirmation device described in Patent Document 1 includes an arm-type door grip that is detachably attached to the outer periphery of a door knob, a lever that is attached to a locking knob, and an adjacent portion between the arm-type door grip and the lever. A locking confirmation switch that is provided and detects whether the lever is in a locked or unlocked position.

Patent Document 1 describes that the lock confirmation device is adapted to the wireless lock confirmation device by incorporating a wireless transmitter in the arm type door grip of the lock confirmation device.

JP 7-331936 A

Conventionally, metal doors are sometimes used for buildings. Metal doors do not transmit radio waves. For this reason, when a wireless lock confirmation device incorporating a wireless transmitter as described in Patent Document 1 is attached to a metal door, a signal is sent to the side of the door where the lock confirmation device is attached. Although it can be transmitted, there may be a case where a signal cannot be transmitted to the side where the door locking confirmation device is not attached. Therefore, in the lock confirmation device described in Patent Document 1, there is a restriction on the attachment position due to the positional relationship with the receiver.

The main object of the present invention is to provide a door opening / closing detection device capable of transmitting a radio signal and having a high degree of freedom in the mounting position.

A door opening / closing detection device according to the present invention includes a door body, a first rotation operation member provided on one side of the door body, a second rotation operation member provided on the other side of the door body, and the door body. , The first rotation operation member is connected to one end, the second rotation operation member is connected to the other end, the first rotation operation member and the second rotation operation It is a door rotation detection apparatus attached to the door which has a metal rotating shaft which rotates a member interlockingly. A door open / close detection device according to the present invention includes a metal rotating member, a power generation mechanism, and a transmission unit. The rotating member rotates as the rotating shaft rotates. The power generation mechanism generates power with the rotation of the rotating member. The transmission unit transmits a radio signal using the power generated by the power generation mechanism when the power generation mechanism generates power. The transmission unit includes an antenna terminal. The rotating shaft and the rotating member are electrically connected, and the antenna terminal of the transmitting unit and the rotating member are electrically connected.

In a specific aspect of the door opening / closing detection device according to the present invention, the door opening / closing detection device is mounted inside the door body.

In another specific aspect of the door opening / closing detection device according to the present invention, the door opening / closing detection device is attached to one side of the door body.

In another specific aspect of the door opening / closing detection device according to the present invention, the power generation mechanism includes a piezoelectric element and a stress application mechanism. The stress applying mechanism applies stress to the piezoelectric element by the number of times corresponding to the rotation angle of the rotating member when the rotating member rotates.

In another specific aspect of the door opening / closing detection device according to the present invention, the door opening / closing detection device further includes an acceleration mechanism that accelerates the rotation of the rotating member and transmits the acceleration to the stress applying mechanism.

According to the present invention, it is possible to provide a door opening / closing detection device capable of transmitting a radio signal and having a high degree of freedom in the mounting position.

FIG. 1 is a schematic side view of a door opening / closing detection device according to a first embodiment of the present invention. FIG. 2 is a schematic plan view of the door opening / closing detection device according to the first embodiment of the present invention. FIG. 3 is a schematic perspective view of the power generation mechanism in the door open / close detection device according to the first embodiment of the present invention. FIG. 4 is a schematic perspective view of the power generation mechanism in the door open / close detection device according to the second embodiment of the present invention. FIG. 5 is a schematic side view of a door opening / closing detection device according to a third embodiment of the present invention.

Hereinafter, an example of a preferable embodiment in which the present invention is implemented will be described. However, the following embodiment is merely an example. The present invention is not limited to the following embodiments.

In the drawings referred to in the following embodiments and the like, members having substantially the same function are referred to by the same reference numerals. In addition, each drawing referred to in the following embodiments and the like is schematically described, and the ratio of the dimensions of an object drawn in the drawing may be different from the ratio of the dimensions of an actual object. is there. The dimensional ratio of the object may be different between the drawings. The specific dimensional ratio of the object should be determined in consideration of the following description.

(First embodiment)
FIG. 1 is a schematic side view of a door opening / closing detection device 1 according to a first embodiment of the present invention. In FIG. 1 and FIGS. 2 to 5 described later, xy− of an orthogonal coordinate system including an x axis, a y axis orthogonal to the x axis, and a z axis orthogonal to the x axis and the y axis. The z axis is appended.

As shown in FIG. 1, the door opening / closing detection device 1 is used by being attached to a door 10. The door 10 has a door body 11. The door main body 11 includes a first door plate 11a and a second door plate 11b. The 1st door board 11a and the 2nd door board 11b are distribute | arranged substantially parallel at intervals. An internal space 11c is formed between the first door plate 11a and the second door plate 11b. Since each of the first door plate 11a and the second door plate 11b is made of metal, it shields radio waves. Each of the 1st door board 11a and the 2nd door board 11b can be comprised by alloys, such as metals, such as iron and aluminum, and stainless steel, for example.

In the present invention, “metal” includes “alloy”.

The door 10 is rotatably provided with a first door knob 12a as a first rotation operation member and a second door knob 12b as a second rotation operation member. The first door knob 12a is provided on the x1 side (first door plate 11a side) of the door body 11. The second door knob 12b is provided on the x2 side (second door plate 11b side) of the door body 11.

The door 10 is provided with a rotating shaft 13. The rotation shaft 13 penetrates the door body 11 and is provided so as to extend from the x1 side of the door body 11 to the x2 side. The rotating shaft 13 is rotatable with respect to the door body 11. The x1 side end of the rotating shaft 13 is connected to the first door knob 12a, and the x2 side end is connected to the second door knob 12b. The rotating shaft 13 rotates together with the first and

second door knobs

12a and 12b. That is, the rotating shaft 13 rotates the first door knob 12a and the second door knob 12b in conjunction with each other. The rotating shaft 13 is made of metal and has conductivity. The rotating shaft 13 can be made of, for example, a metal such as iron or aluminum, or an alloy such as stainless steel.

In the present embodiment, the door opening / closing detection device 1 is attached to the inside of the door 10. Specifically, the door opening / closing detection device 1 is mounted in the internal space 11 c of the door body 11.

FIG. 2 is a schematic plan view of the door opening / closing detection device 1 according to the first embodiment of the present invention. As shown in FIG. 2, the door open / close detection device 1 includes a housing 20. The housing | casing 20 can be comprised with metals, ceramics, resin, etc., such as iron and stainless steel, for example. The casing 20 houses a rotating member 21, a power generation mechanism 30, and a transmission unit 40. The housing 20 is fixed to the door body 11.

Rotating member 21 is provided with an opening 21a. The rotary shaft 13 is inserted and fixed in the opening 21a. For this reason, the rotating member 21 rotates as the rotating shaft 13 rotates.

Rotating member 21 is made of metal and has conductivity. For this reason, the rotating member 21 is electrically connected to the rotating shaft 13. The rotating member 21 can be made of, for example, a metal such as iron or aluminum, or an alloy such as stainless steel.

The power generation mechanism 30 is a mechanism that generates power as the rotating member 21 rotates. The power generation mechanism 30 is electrically connected to the transmission unit 40 and supplies the generated power to the transmission unit 40.

The transmission unit 40 transmits a radio signal using the power generated by the power generation mechanism 30 when the power generation mechanism 30 generates power. Here, the antenna terminal (not shown) of the transmission unit 40 is electrically connected to the rotating member 21 electrically connected to the rotating shaft 13. For this reason, the wireless signal transmitted from the transmission unit 40 is wirelessly transmitted from the rotary shaft 13 functioning as an antenna.

FIG. 3 is a schematic perspective view of the power generation mechanism 30 in the door opening / closing detection device 1 according to the first embodiment of the present invention. Next, the configuration of the power generation mechanism 30 in this embodiment will be described with reference mainly to FIGS. 2 and 3.

2 and 3, the power generation mechanism 30 includes a piezoelectric element 31 and a stress application mechanism 32.

The piezoelectric element 31 has a columnar piezoelectric body and an electrode. The piezoelectric body can be made of, for example, lead zirconate titanate (PZT). The electrodes may be arranged in any way as long as the electric power generated in the piezoelectric body can be taken out. The electrodes may be, for example, a pair and may be arranged so as to sandwich the piezoelectric body. Each of the pair of electrodes may be composed of a plurality of electrodes. The piezoelectric element 31 may be configured by a stacked piezoelectric body formed by stacking a plurality of piezoelectric layers and a plurality of internal electrodes. As shown in FIG. 3, the piezoelectric element 31 has a quadrangular prism shape. The piezoelectric element 31 has a first surface 31a and a second surface 31b. The first surface 31a and the second surface 31b face each other in the z-axis direction.

The stress applying mechanism 32 is a mechanism that applies stress to the piezoelectric element 31 as many times as the rotational angle of the rotating member 21 when the rotating member 21 rotates. In the present embodiment, the stress application mechanism 32 is specifically configured as follows.

The stress application mechanism 32 includes a stopper 33. As shown in FIG. 3, the stopper 33 includes a contact portion 33 a including a contact surface that is in contact with the first surface 31 a of the piezoelectric element 31. A cam 35 is rotatably attached to the stopper 33. The planar shape of the cam 35 is non-circular. Specifically, the cam 35 has a substantially polygonal shape, more specifically, a substantially rectangular shape in plan view. A shaft having a gear on the outer peripheral surface is fixed to the central portion of the cam 35 so as not to rotate. The shaft of the cam 35 is meshed with the rotating member 21. For this reason, the cam 35 rotates as the rotating member 21 rotates.

A lever 34 is attached to the stopper 33. In the present embodiment, the lever 34 is directly connected to the stopper 33. That is, the stopper 33 and the lever 34 are integrally formed. The lever 34 can be made of, for example, metal, ceramics, resin, or the like. The lever 34 includes a connecting portion 34a, a contact portion 34b, and a displacement portion 34c. The connection part 34a connects the contact part 34b and the displacement part 34c. The contact portion 34 b includes a contact surface that is in contact with the second surface 31 b of the piezoelectric element 31. The displacement part 34c is provided on the opposite side of the contact part 34b with respect to the connection part 34a in the y-axis direction. A substantially cylindrical protrusion 36 is fixed to the displacement part 34c. The protrusion 36 is in contact with the cam 35.

In the door opening / closing detection device 1, when the operator rotates the first door knob 12a or the second door knob 12b, the rotating member 21 rotates as the rotating shaft 13 rotates. When the rotating member 21 rotates, the cam 35 rotates accordingly. Here, the planar shape of the cam 35 is non-circular as described above. Therefore, the distance between the central axis of the cam 35 and the protrusion 36 changes as the cam 35 rotates. Therefore, as the cam 35 rotates, the protrusion 36 and the displacement portion 34c fixed thereto swing in the y-axis direction. When the displacement portion 34c swings in the y-axis direction, the lever 34 swings in the rotation direction around the rotation axis C located near the connection portion between the stopper 33 and the lever 34. Accordingly, the contact part 34b is displaced relatively along the z-axis direction with respect to the contact part 33a. Thereby, the contact surface of the contact part 34b presses the second surface 31b of the piezoelectric element 31, and the piezoelectric element 31 is compressed along the z-axis direction by the contact part 33a and the contact part 34a. As a result, stress is applied to the piezoelectric element 31, and electric power is generated in the piezoelectric element 31 due to the piezoelectric effect.

The electric power generated in the piezoelectric element 31 is supplied to the transmission unit 40 shown in FIG. The transmission unit 40 transmits a signal including information on the operation of the first door knob 12a or the second door knob 12b from the antenna terminal using the electric power generated in the power generation mechanism 30. Here, the antenna terminal of the transmission unit 40 is electrically connected to the metal rotation shaft 13 via the metal rotation member 21. For this reason, the signal is wirelessly transmitted to a receiving device installed outside the door 10 using the rotary shaft 13 as an antenna.

As described above, in the door open / close detection device 1, the rotating shaft 13 and the rotating member 21 are made of metal and therefore have electrical conductivity, and the rotating member 21 and the rotating shaft 13 are electrically connected. In addition, the rotating member 21 and the antenna terminal of the transmitter 40 are electrically connected. For this reason, the metal rotating shaft 13 that reaches both the first door plate 11a side and the second door plate 11b side of the door body 11 can function as an antenna. Therefore, for example, as in this embodiment, even when the door open / close detection device 1 is installed inside the door 10, the first door plate 11 a side and the second door plate 11 b side of the door 10 Both can transmit radio signals. Therefore, the door opening / closing detection device 1 can be installed inside the door 10.

In addition, since the door opening / closing detection device 1 includes the power generation mechanism 30, it is not always necessary to provide a battery or an external power source. Therefore, the door opening / closing detection apparatus 1 can be used semipermanently.

Further, the door opening / closing detection device 1 can be easily attached to the door 10 by inserting the rotating shaft 13 into the rotating member 21.

In the present embodiment, an example in which the rotation operation member is a door knob has been described. However, in the present invention, the rotation operation member is not limited to the door knob. In the present invention, the rotation operation member may be, for example, a lever type switch, a rotary handle, or the like.

Hereinafter, another example of the preferred embodiment of the present invention will be described. In the following description, members having substantially the same functions as those of the first embodiment are referred to by the same reference numerals, and description thereof is omitted.

(Second Embodiment)
FIG. 4 is a schematic perspective view of the power generation mechanism 30 in the door open / close detection device according to the second embodiment of the present invention. The door open / close detection device according to the second embodiment is different from the first embodiment in that an acceleration mechanism 37 is provided in the power generation mechanism 30. The acceleration mechanism 37 includes a gear 37 a meshed with the rotating member 21, has at least one gear pair, accelerates the rotation of the rotating member 21, and transmits the acceleration to the stress applying mechanism 32. For this reason, for example, the rotation angle of the cam 35 when the rotation member 21 rotates together with the rotation shaft 13 is larger than the rotation angles of the rotation shaft 13 and the rotation member 21. Therefore, by providing the acceleration mechanism 37, the number of times stress is applied to the piezoelectric element 31 can be increased. Therefore, the amount of power generation can be increased without increasing the stress applied to the piezoelectric element 31.

From the viewpoint of increasing the amount of power generation, the ratio of the rotation angle of the cam 35 to the rotation angle of the rotation member 21 ((rotation angle of the cam 35) / (rotation angle of the rotation member 21)) is 1 or more. It is preferable that it is 2 or more. However, if the ratio ((rotation angle of the cam 35) / (rotation angle of the rotating member 21)) is too large, the torque required to rotate the first or

second door knob

12a, 12b may become too large. is there. For this reason, the ratio ((the rotation angle of the cam 35) / (the rotation angle of the rotating member 21)) is preferably 100 or less.

(Third embodiment)
FIG. 5 is a schematic side view of a door opening / closing detection device according to a third embodiment of the present invention. As shown in FIG. 5, the door opening / closing detection device 1 may be attached to one side (the first door plate 11 a side or the second door plate 11 b side) of the door body 11. Even in such a case, since the rotary shaft 13 functions as an antenna, a radio signal can be transmitted to both the first door plate 11a side and the second door plate 11b side of the door 10.

In this case, the door opening / closing detection device 1 can be installed without disassembling the door body 11. For this reason, installation of the door opening / closing detection apparatus 1 becomes easier.

DESCRIPTION OF SYMBOLS 1 ... Door opening / closing detection apparatus 10 ... Door 11 ... Door main body 11a ... 1st door board 11b ... 2nd door board 11c ... Internal space 12a ... 1st door knob 12b ... 2nd door knob 13 ... Rotating shaft 20 ... Housing Body 21 ... Rotating member 21a ... Opening 30 ... Power generation mechanism 31 ... Piezoelectric element 31a ... First surface 31b ... Second surface 32 ... Stress applying mechanism 33 ... Stopper 33a ... Abutting portion 34 ... Lever 34a ... Connecting portion 34b ... Contact part 34c ... Displacement part 35 ... Cam 36 ... Projection part 37 ... Acceleration mechanism 37a ... Gear 40 ... Transmission part

Claims

A door main body, a first rotation operation member provided on one side of the door main body, a second rotation operation member provided on the other side of the door main body, and the one end of the door main body. The first rotation operation member is connected to a portion, and the second rotation operation member is connected to the other end portion, and the first rotation operation member and the second rotation operation member are linked to each other. A door rotation detecting device attached to a door having a metal rotating shaft to be rotated,
A metal rotating member that rotates as the rotating shaft rotates;
A power generation mechanism that generates power with the rotation of the rotating member;
When the power generation mechanism generates power, a transmission unit that transmits a radio signal using the power generated by the power generation mechanism;
With
The transmission unit includes an antenna terminal, the rotating shaft and the rotating member are electrically connected, and the antenna terminal of the transmitting unit and the rotating member are electrically connected. .
The door opening / closing detection device according to claim 1, which is attached to the inside of the door body.
The door opening / closing detection device according to claim 1, which is attached to one side of the door body.
The power generation mechanism is
A piezoelectric element;
A stress applying mechanism that applies stress to the piezoelectric element a number of times according to the rotation angle of the rotating member when the rotating member rotates;
The door opening / closing detection device according to any one of claims 1 to 3, further comprising:
The door opening / closing detection device according to claim 4, further comprising an acceleration mechanism that accelerates rotation of the rotating member and transmits the acceleration to the stress applying mechanism.