CN106971498B

CN106971498B - Hidden alarm device

Info

Publication number: CN106971498B
Application number: CN201710216638.2A
Authority: CN
Inventors: 王淑云; 朱雅娜; 严梦加
Original assignee: Zhejiang Normal University CJNU
Current assignee: Hefei Jiuzhou Longteng Scientific And Technological Achievement Transformation Co ltd; Shaanxi Smart Daqin Information Technology Co.,Ltd.
Priority date: 2017-03-21
Filing date: 2017-03-21
Publication date: 2022-12-27
Anticipated expiration: 2037-03-21
Also published as: CN106971498A

Abstract

The invention belongs to the technical field of safety, and particularly relates to a hidden alarm device. A seat plate of the hidden alarm device is provided with a round hole, a guide groove, a groove and a counter bore; the rotating shaft penetrates through two ends of the round hole and is connected with a backrest through threads; the rotating shaft is sleeved with a torsion spring; the long rod passes through the guide groove and is fixed on the rotating plate; the middle part of the long rod is sleeved with a connecting block, and the short rod is fixed in a through hole on the connecting rod through a limiting clamp spring and a positioning shaft shoulder; the two ends of the short rod are sleeved with upper connecting sleeves; the piezoelectric vibrator is formed by bonding a metal substrate and uniformly distributed piezoelectric wafers, and the middle parts of the adjacent metal substrates are fixed together through a connecting block; the piezoelectric vibrators are electrically connected in series and connected to the energy storage device through a lead; the trigger button is connected to the circuit board through a wire, and the energy accumulator is connected to the circuit board through a wire. The alarm device is embedded in the seat, so that the concealment is good; a self-generating structure is arranged in the device, so that batteries do not need to be installed and wires do not need to be arranged, and the device is convenient and reliable to work; the operation is simple, and the alarm operation can be completed without two hands.

Description

Hidden alarm device

Technical Field

The invention belongs to the technical field of safety, and particularly relates to a hidden alarm device.

Background

In recent years, robbery in banks/supermarkets/jewelry stores, medical injury of patients and other criminal cases are reported, and affected staff, medical staff and the like are often limited by conditions to take post-alarm, so that the optimal alarm and pursuit opportunities of security guards and police are delayed, and serious loss and casualty events are easily caused. Various anti-theft and monitoring systems are installed in important office places such as banks, supermarkets, jewelry stores, hospitals and the like to ensure property and personal safety; however, the conventional video monitoring center and the telephone alarm help-seeking system have the problems of alarm lag, slow alarm positioning and the like, once emergencies such as robbery, medical injury of patients and the like occur, the alarm means of the victim is single and is limited to the modes of a telephone, a mobile phone, an alarm and the like, the transmission speed of dialing and telephone lines is slow, the alarm means is obvious, the alarm is easy to be interrupted and prevented, the alarm is delayed, and property loss and even personal injury are caused. In addition, most of the existing alarm and help-seeking systems adopt cables or batteries for power supply, and once the power supply problem occurs, the alarm system cannot work normally, and the problems of missing report or under report and the like occur. In summary, many problems still remain to be solved in order to realize effective, stable and reliable operation of the alarm system.

Disclosure of Invention

The invention aims to provide a hidden alarm device, which can realize alarm of a victim in a hidden state. The invention adopts the following implementation scheme: the seat plate is provided with a round hole, a guide groove, a groove and a counter bore; the rotating shaft penetrates through the circular hole, and two ends of the rotating shaft are connected with a backrest through threads; the backrest consists of a backrest arm and a rotating plate, and the backrest can rotate around a rotating shaft; the rotating shaft is sleeved with a torsion spring, the left end of the torsion spring is clamped on the groove, and the right end of the torsion spring is clamped on the pin; the pin is fixed in the small hole on the rotating shaft; the long rod passes through the guide groove and is fixed on the rotating plate; the middle part of the long rod is sleeved with a connecting block, and the connecting block is riveted with a connecting rod through a rivet; the short rod is fixed in the through hole of the connecting rod through a limiting clamp spring and a positioning shaft shoulder; the two ends of the short rod are sleeved with upper connecting sleeves, and the end parts of the upper connecting sleeves are fixed on the short rod through screws; the piezoelectric vibrator is formed by bonding a metal substrate and uniformly distributed piezoelectric wafers, the piezoelectric vibrator is in a straight structure in a natural state before assembly and is changed into a bent structure after installation, the curvature radius of the piezoelectric wafers after installation is smaller than that of the metal substrate, and the piezoelectric wafers bear compressive stress; the upper ends of the metal substrates are fixed on the upper connecting sleeve through screws, the middle parts of the adjacent metal substrates are fixed together through a connecting block, and the lower ends of the metal substrates are fixed on the lower connecting sleeve through screws; the piezoelectric vibrators are electrically connected in series and connected to the energy storage device through a lead; the upper and lower connecting sleeves are sleeved on the guide rod, and the middle part of the guide rod is arranged in the chute; the right end of the guide rod is fixed through a nut; the cushion is fixed on the upper part of the seat board; the sitting legs are fixed at the bottom of the seat plate through screws, and the triggering buttons are arranged at the positions, close to the right side of the seat plate, of the sitting legs; the trigger button is connected to the circuit board through a wire, and the energy accumulator is connected to the circuit board through a wire.

When the backrest works normally and the backrest is not stressed, the connecting rod keeps a balanced state under the acting force of the torsion spring and the piezoelectric vibrator, and the pressure stress borne by the piezoelectric wafer is half of an allowable value; the back of a user leans against the backrest, the long rod on the rotating plate is driven by the force of the leaning arm to rotate anticlockwise by a certain angle, the connecting rod moves rightwards under the driving of the long rod, the piezoelectric vibrator on the connecting rod is pressed and deformed, and the pressed amount of the piezoelectric vibrator is smaller than the maximum allowable value; when the backrest does not lean against, the backrest resets under the acting force of the torsion spring and the piezoelectric vibrator; electric energy generated by the piezoelectric vibrator through alternative stretching deformation is stored in the energy storage device after being processed by the circuit board; when the user steps on the trigger button with the foot, the trigger button is closed, and the circuit board sends alarm signal to the control cabinet after receiving the pulse signal.

The characteristics and advantages are as follows: (1) the alarm device is embedded in the seat, so that the concealment is good; (2) a self-generating structure is arranged in the device, so that batteries do not need to be installed and wires do not need to be arranged, and the device is convenient and reliable to work; (3) the operation is simple, and the alarm operation can be finished without two hands; (4) the pre-bending assembly of the piezoelectric vibrator only bears the compressive stress, the stress distribution is uniform, and the power generation capacity is strong.

Drawings

FIG. 1 is a schematic diagram of a concealed alarm device according to a preferred embodiment of the present invention;

FIG. 2 isbase:Sub>A sectional view A-A of FIG. 1;

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a schematic view of the seat pan of the preferred embodiment of the present invention;

FIG. 5 is a left side view of FIG. 4;

fig. 6 is a schematic structural view of a piezoelectric vibrator according to a preferred embodiment of the present invention;

FIG. 7 is a top view of FIG. 6;

the specific implementation mode is as follows:

the seat plate 1 is provided with a round hole 101, a guide groove 102, a groove 103 and a counter bore 104; the rotating shaft a2 penetrates through the round hole 101, and two ends of the rotating shaft a2 are connected with the backrest 2 through bolts; the backrest 2 consists of a backrest arm 201 and a rotating plate 202, and the backrest 2 can rotate around a rotating shaft a 2; the rotating shaft a2 is sleeved with a torsion spring S, the left end of the torsion spring S is clamped on the groove 103, and the right end of the torsion spring S is clamped on the pin X; the pin X is fixed in a small hole on the rotating shaft a 2; the long rod a1 passes through the guide groove 102 and is fixed on the rotating plate 202; the middle part of the long rod a1 is sleeved with a connecting block 3, and the connecting block 3 is riveted with a connecting rod 5 through a rivet 301; the short rod 4 is fixed in the through hole of the connecting rod 5 through a limiting clamp spring 401 and a positioning shaft shoulder; an upper connecting sleeve 402 is sleeved at two ends of the short rod 4, and the end part of the upper connecting sleeve 402 is fixed on the short rod 4 through a screw; the piezoelectric vibrator I is formed by bonding a metal substrate m and uniformly distributed piezoelectric wafers p, the piezoelectric vibrator I is in a straight structure in a natural state before assembly and is changed into a bent structure after installation, the curvature radius of the piezoelectric wafers p after installation is smaller than that of the metal substrate m, and the piezoelectric wafers p bear compressive stress; the upper ends of the metal substrates m are fixed on the upper connecting sleeve 402 through screws, the middle parts of the adjacent metal substrates m are fixed together through a connecting block 6, and the lower ends of the metal substrates m are fixed on the lower connecting sleeve 7 through screws; the piezoelectric vibrators I are electrically connected in series and connected to the energy accumulator B through a lead; the upper and lower connecting sleeves 7 are sleeved on the guide rod a3, and the middle part of the guide rod a3 is arranged in the sliding chute 302; the right end of the guide rod a3 is fixed through a nut 8; the cushion 9 is fixed on the upper part of the seat board 1; the sitting leg 10 is fixed at the bottom of the seat plate 1 through a screw, and the triggering button 11 is arranged at the position, close to the right side of the seat plate 1, of the sitting leg 10; the trigger button 11 is connected to the circuit board C through a wire, and the energy accumulator B is connected to the circuit board C through a wire.

When the invention works normally and the backrest 2 is not stressed, the connecting rod 5 keeps a balance state under the acting force of the torsion spring S and the piezoelectric vibrator I, and the pressure stress borne by the piezoelectric chip p is half of an allowable value; the back of a user leans against the backrest 2, the leaning arm 201 is stressed to drive the long rod a1 on the rotating plate 202 to rotate anticlockwise for a certain angle, the connecting rod 5 is driven by the long rod a1 to move rightwards, the piezoelectric vibrator I on the connecting rod 5 is pressed to deform, and the pressed amount is smaller than the maximum allowable value; when the backrest 2 is not leaned, the backrest resets under the acting force of the torsion spring S and the piezoelectric vibrator I; electric energy generated by the alternative stretching deformation of the piezoelectric vibrator I is processed by the circuit board C and then stored in the energy accumulator B; when the user steps on the trigger button 11 with the foot, the trigger button 11 is closed, and the circuit board C sends out an alarm signal to the console after receiving the pulse signal.

Claims

1. A hidden alarm device which is characterized in that: the seat plate is provided with a round hole, a guide groove, a groove and a counter bore; the rotating shaft penetrates through the circular hole, and two ends of the rotating shaft are connected with a backrest through threads; the backrest consists of a backrest arm and a rotating plate, and the backrest can rotate around a rotating shaft; the rotating shaft is sleeved with a torsion spring, the left end of the torsion spring is clamped on the groove, and the right end of the torsion spring is clamped on the pin; the pin is fixed in the small hole on the rotating shaft; the long rod passes through the guide groove and is fixed on the rotating plate; the middle part of the long rod is sleeved with a connecting block, and the connecting block is riveted with a connecting rod through a rivet; the short rod is fixed in the through hole of the connecting rod through a limiting clamp spring and a positioning shaft shoulder; the two ends of the short rod are sleeved with upper connecting sleeves, and the end parts of the upper connecting sleeves are fixed on the short rod through screws; the piezoelectric vibrator is formed by bonding a metal substrate and uniformly distributed piezoelectric wafers, the piezoelectric vibrator is in a straight structure in a natural state before assembly and is changed into a bent structure after installation, the curvature radius of the piezoelectric wafers after installation is smaller than that of the metal substrate, and the piezoelectric wafers bear compressive stress; the upper ends of the metal substrates are fixed on the upper connecting sleeve through screws, the middle parts of the adjacent metal substrates are fixed together through a connecting block, and the lower ends of the metal substrates are fixed on the lower connecting sleeve through screws; all the piezoelectric vibrators are electrically connected in series and connected to an energy accumulator through a lead; the upper and lower connecting sleeves are sleeved on the guide rod, and the middle part of the guide rod is arranged in the chute; the right end of the guide rod is fixed through a nut; the cushion is fixed on the upper part of the seat board; the sitting legs are fixed at the bottom of the seat plate through screws, and the triggering buttons are arranged at the positions, close to the right side of the seat plate, of the sitting legs; the trigger button is connected to the circuit board through a lead, and the energy accumulator is connected to the circuit board through a lead; when the backrest works normally and the backrest is not stressed, the connecting rod keeps a balanced state under the acting force of the torsion spring and the piezoelectric vibrator, and the pressure stress borne by the piezoelectric wafer is half of an allowable value; the back of a user leans against the backrest, the leaning arm is stressed to drive the long rod on the rotating plate to rotate anticlockwise for a certain angle, the connecting rod is driven by the long rod to move rightwards, the piezoelectric vibrator on the connecting rod is pressed to deform, and the pressed amount of the piezoelectric vibrator is smaller than the maximum allowable value; when the backrest does not lean against, the backrest resets under the acting force of the torsion spring and the piezoelectric vibrator; electric energy generated by the piezoelectric vibrator through alternative stretching deformation is stored in the energy storage device after being processed by the circuit board; when the user steps on the trigger button with the foot, the trigger button is closed, and the circuit board sends alarm signal to the control cabinet after receiving the pulse signal.