Concealed alarm device and method

Abstract

The invention belongs to the technical field of campus safety, and provides a concealed alarm device and method, and the device comprises an alarm part which comprises a housing, a sealing cover connected with the housing in a clamping manner, and an alarm assembly, a trigger assembly and an adjustment assembly which are disposed in the housing; the mounting component comprises a mounting box, a mounting cover clamped with the mounting box, a mounting assembly connected with the mounting box and an operation assembly, and the shell is clamped with the mounting cover; the decoration part comprises a schoolbag strap and a decoration which is arranged on the alarm part and the mounting part in a sleeving manner; the alarm component is camouflaged through the ornament, so that the alarm component is not easily found by manufacturers under special conditions, the attention of the manufacturers under the special conditions can be reduced, and a user can conveniently use the alarm component to ask for help under the condition that the attention of the other side is not aroused; and therefore, a hidden alarm means can be provided for a user in an emergency.

Description

Technical Field

[0001] The invention belongs to the technical field of campus safety, in particular to a concealed alarm device and method. Background Art

[0002] Campus safety involves all aspects of students' life, study and growth on campus, such as personal safety, material property safety, mental health, etc. Certain social behaviors in school will disrupt the overall harmony and affect students' self-identity and social skills.

[0003] When faced with social behaviors that disrupt overall harmony, students will experience psychological pressure, which usually manifests as being at a loss, unable to leave the scene or seek help.

[0004] Therefore, those skilled in the art have proposed a concealed alarm device and method to solve the problems raised by the background technology. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a concealed alarm device and method to solve the problem in the prior art that students will experience psychological pressure when faced with social behaviors that disrupt overall harmony, which usually manifests as being at a loss and unable to leave the scene or seek help.

[0006] A concealed alarm device comprises an alarm component, comprising a housing, a closing cover engaged with the housing, and an alarm component, a trigger component and an adjustment component arranged in the housing;

[0007] The installation component includes an installation box, an installation cover snap-fitted with the installation box, the housing snap-fitted with the installation cover, and an installation component and an operating component connected with the installation box;

[0008] The decorative component comprises a school bag strap and an ornament sleeved on the alarm component and the installation component.

[0009] Preferably, the alarm assembly includes a buzzer fixedly installed in the shell, and sound transmission holes opened on the shell and the closing cover.

[0010] Preferably, the trigger assembly includes a pressing hole opened on the shell, a pressing rod slidably connected to the pressing hole, an adjustment groove opened on the circumference of the pressing rod, a trigger plate rotatably connected to the shell, and a trigger spring fixedly connected to the trigger plate.

[0011] Preferably, the trigger plate is a "Z"-shaped plate, one end of the trigger plate extends into the adjustment slot, the other end of the trigger plate is fixedly connected to the trigger spring, and the end of the trigger spring away from the pressing plate is fixedly connected to the housing.

[0012] Preferably, the adjustment assembly includes a baffle fixedly connected to the pressing rod, a telescopic rod fixedly connected to the baffle, a telescopic cylinder slidably connected to the telescopic rod, an adjustment plate sleeved on the circumference of the telescopic rod and the telescopic cylinder and threadedly connected to the telescopic cylinder, and a fixing plate fixedly connected to the telescopic cylinder.

[0013] Preferably, two ends of the adjusting spring are respectively against the baffle plate and the adjusting plate, and the fixing plate is fixedly connected to the housing.

[0014] Preferably, the installation assembly includes an operating plate rotatably connected to the installation box, a guide groove opened on the operating plate, a guide rod slidably connected to the guide groove, a clamping plate fixedly connected to the guide rod, a plurality of sockets opened on the installation box, and pins inserted into the clamping plate and the sockets.

[0015] Preferably, one end of the guide groove is far away from the center of the operating plate, and the other end of the guide groove is close to the center of the operating plate, and the backpack strap is located in a groove formed by the clamping plate.

[0016] Preferably, the operating assembly includes a rotating disk fixedly connected to the operating panel, and a receiving groove provided on the mounting box, and the rotating disk is rotatably connected to the receiving groove.

[0017] A method for using a concealed alarm device comprises the following steps:

[0018] S1: Place the mounting component near the backpack strap and make the backpack strap be located in the groove formed by the two clamping plates;

[0019] S2: Turn the rotating disk, the rotating disk drives the operation panel to rotate, at this time the guide slot rotates synchronously with the operation panel, the guide rod is affected by the guide slot to make the two clamping plates approach each other until the clamping plates and the backpack belt abut against each other, then insert the pin from the rear end of the clamping plate, the pin passes through the backpack belt and enters the inside of the installation box through the jack, at this time the alarm component is fixed on the backpack belt through the installation component;

[0020] S3: Rotate the adjustment plate, the adjustment plate moves on the telescopic cylinder due to the thread, adjust the distance between the baffle and the adjustment plate, and then adjust the elasticity of the adjustment spring so that the force of squeezing the pressing rod is suitable for the user's operation;

[0021] S4: putting the decoration on the alarm component and the installation component, and providing camouflage for the alarm component through the decoration;

[0022] 5S: When a special situation occurs, the user holds the decoration tightly with both hands. The holding force will push the pressing rod into the shell. As the pressing rod moves, the edge of the adjustment slot will contact the pressing rod and drive the trigger plate to rotate during the movement of the pressing rod. The trigger plate rotates and touches the switch of the buzzer. The buzzer sounds an alarm to attract the attention of people around.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention provides camouflage for the alarm component through decorations, so that the alarm component is not easily discovered by the maker of the special situation, thereby reducing the attention of the maker of the special situation, making it easier for the user to use the alarm component to ask for help without attracting the attention of the other party, thereby providing the user with a concealed alarm means in an emergency.

[0025] 2. The present invention fixes the alarm component on the backpack strap through the installation component, and the operating component can change the size of the installation component, so that the installation component can adapt to backpack straps of different widths, thereby improving the adaptability of the device.

[0026] 3. The present invention allows the user to hold the decoration on the backpack strap with both hands. The holding force will push the pressing rod. During the movement of the pressing rod, the trigger plate will drive the rotation of the trigger plate, which will touch the switch of the buzzer, and then the buzzer will sound an alarm to attract the attention of people around. The holding action is a subconscious action when a person is nervous. The holding action is not likely to attract the attention of the creator of the special situation, and provides a means for the user to seek help. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is an overall schematic diagram of a concealed alarm device;

[0028] Figure 2 A schematic diagram of a concealed alarm device before the decoration is installed;

[0029] Figure 3 It is a front schematic diagram of an alarm component of a concealed alarm device;

[0030] Figure 4 It is a rear schematic diagram of the installation components of a concealed alarm device;

[0031] Figure 5 A schematic diagram of the parts inside the housing of a concealed alarm device;

[0032] Figure 6 The figure is a rear schematic diagram of the installation components of a concealed alarm device.

[0033] In the figure:

[0034] 100, alarm component; 101, housing; 102, closure cover; 103, alarm assembly; 104, trigger assembly; 105, adjustment assembly; 200, installation component; 201, installation box; 202, installation cover; 203, installation assembly; 204, operation assembly; 300, decoration component; 301, backpack strap; 302, decoration; 103a, buzzer; 103b, sound transmission hole; 104a, press hole; 104b, press rod; 104c, adjustment slot; 104d, trigger plate; 104e, trigger spring; 105a, baffle; 105b, telescopic rod; 105c, telescopic cylinder; 105d, adjustment spring; 105e, adjustment plate; 105f, fixing plate; 203a, operating plate; 203b, guide slot; 203c, guide rod; 203d, clamping plate; 203e, jack; 203f, pin; 204a, rotating disk; 204b, accommodating slot. DETAILED DESCRIPTION

[0035] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] Embodiment 1

[0037] As attached Figure 1 To Attachment Figure 4 As shown, the present invention provides a concealed alarm device, including an alarm component 100, including a shell 101, a closing cover 102 clamped with the shell 101, wherein the shell 101 and the closing cover 102 cooperate to form a closed space to provide an environment for the installation of other parts, an alarm component 103, a trigger component 104 and an adjustment component 105 are arranged in the shell 101, wherein the triggering force of the trigger component 104 can be adjusted according to the strength of the user through the adjustment component 105, which is convenient for use and can play a role in preventing accidental touch, and the alarm component 103 can be made to sound an alarm through the trigger component 104;

[0038] The installation component 200 includes an installation box 201, an installation cover 202 clamped with the installation box 201, wherein the installation box 201 and the installation cover 202 cooperate to form a closed space to provide an environment for the installation of other parts, the housing 101 is clamped with the installation cover 202, and an installation component 203 and an operating component 204 connected to the installation box 201, wherein the size of the installation component 203 can be adjusted according to the backpack strap 301 of different widths through the operating component 204, and then the installation component 203 is fixed on the backpack strap 301;

[0039] The decorative component 300 includes a backpack strap 301. A backpack is a common item for students. Setting the alarm component 100 on the backpack strap 301 can reduce the attention of the maker in special circumstances. The decoration 302 mounted on the alarm component 100 and the installation component 200 can further reduce the attention of the maker in special circumstances by providing a shield for the alarm component 100. The decoration 302 preferably uses decorations that will not affect the propagation of sound, such as plush toys.

[0040] As can be seen from the above, the size of the installation component 203 is adjusted according to the backpack strap 301 of different widths through the operating component 204, and then the installation component 203 is fixed on the backpack strap 301, and then the decoration 302 is put on the alarm component 100 and the installation component 200 to provide shielding, thereby reducing the attention of the maker of special circumstances. When encountering special circumstances, the user holds the decoration 302 on the backpack strap 301 with both hands. The holding force will cause the trigger component 104 to move and touch the alarm component 103 to sound an alarm. The holding action is a subconscious action when a person is nervous, and the holding action is not easy to attract the attention of the maker of special circumstances, providing a means for the user to seek help.

[0041] Embodiment 2:

[0042] As attached Figure 5 As shown, this embodiment is basically the same as the previous embodiment, with the difference that the alarm component 103 includes a buzzer 103a fixedly installed in the housing 101, wherein the buzzer 103a can sound an alarm to attract the attention of people around and call for help, and sound transmission holes 103b are opened on the housing 101 and the closing cover 102, wherein the opening of the sound transmission holes 103b facilitates the sound transmission of the buzzer 103a.

[0043] Specifically, the trigger assembly 104 includes a pressing hole 104a provided on the housing 101, a pressing rod 104b slidably connected to the pressing hole 104a, and when the user holds the ornament 302 tightly, the pressing rod 104b will be pushed into the housing 101 along the pressing hole 104a; an adjusting groove 104c provided on the peripheral side of the pressing rod 104b, and in an initial state, the adjusting groove 104c does not contact the trigger plate 104d, and the length of the adjusting groove 104c is redundant, which can prevent the pressing rod 104b from touching the trigger plate 104d as soon as it moves, thereby reducing the possibility of being accidentally touched; a trigger plate 104d rotatably connected to the housing 101, wherein as the pressing rod 104b moves, the edge of the adjusting groove 104c contacts the trigger plate 104d, thereby driving the trigger plate 104d to rotate; a trigger spring 104e fixedly connected to the trigger plate 104d, wherein the trigger spring 104e can reset the trigger plate 104d for the next use.

[0044] Furthermore, the trigger plate 104d is a "Z"-shaped plate, which facilitates the rotation of the trigger plate 104d in the housing 101 without adversely affecting the operation of other parts. One end of the trigger plate 104d extends into the adjustment slot 104c to prepare for the edge of the adjustment slot 104c to contact the trigger plate 104d. The other end of the trigger plate 104d is fixedly connected to the trigger spring 104e, and the end of the trigger spring 104e away from the pressing plate is fixedly connected to the housing 101.

[0045] Furthermore, the adjustment assembly 105 includes a baffle 105a fixedly connected to the pressing rod 104b, a telescopic rod 105b fixedly connected to the baffle 105a, and a telescopic cylinder 105c slidably connected to the telescopic rod 105b, wherein as the pressing rod 104b enters the housing 101, the pressing rod 104b pushes the telescopic rod 105b to make the telescopic rod 105b enter the telescopic cylinder 105c, and an adjustment spring 105d is sleeved on the sides of the telescopic rod 105b and the telescopic cylinder 105c. When the telescopic rod 105b enters the telescopic cylinder 105c, the adjustment spring 105d is compressed and is used to drive the pressing rod 104b to move. The pressure rod 104b resets to accumulate energy, and the telescopic cylinder 105c is provided with a thread, and an adjustment plate 105e is threadedly connected to the telescopic cylinder 105c, wherein the movement of the adjustment plate 105e will change the distance from the baffle 105a, thereby changing the elastic force of the adjustment spring 105d, and the user can adjust the elastic force of the spring 105d as needed, which is easy to operate. At the same time, the movement of the pressing rod 104b needs to overcome the elastic force of the adjustment spring 105d, thereby reducing the possibility of accidental touching, and a fixed plate 105f fixedly connected to the telescopic cylinder 105c, wherein the fixed plate 105f is used to fix the telescopic cylinder 105c.

[0046] Furthermore, two ends of the adjusting spring 105 d are respectively against the baffle 105 a and the adjusting plate 105 e , and the fixing plate 105 f is fixedly connected to the housing 101 .

[0047] As can be seen from the above, by rotating the adjustment plate 105e, the adjustment plate 105e will be affected by the thread and move along the length direction of the telescopic cylinder 105c, changing the distance between the adjustment plate 105e and the baffle 105a, and then the elastic force of the adjustment spring 105d can be changed according to the strength of the user; when encountering special circumstances, the user holds the decoration 302 on the backpack strap 301 with both hands, and the holding force will cause the pressing rod 104b to enter the interior of the shell 101 along the pressing hole 104a. As the pressing rod 104b moves, the edge of the adjustment groove 104c contacts the trigger plate 104d, and the thrust of the continued movement of the pressing rod 104b will cause the trigger plate 104d to rotate, and the rotation touches the switch of the buzzer 103a, thereby causing the buzzer 103a to sound an alarm, and the alarm sound is transmitted to the surroundings through the sound transmission hole 103b and the decoration 302, attracting the attention of people around, thereby achieving the purpose of asking for help. Most of the creators of special circumstances do not want their behavior to be discovered and stop.

[0048] Embodiment three:

[0049] As attached Figure 4 and attached Figure 6 As shown, this embodiment is basically the same as the previous embodiment, except that the installation assembly 203 includes an operation plate 203a rotatably connected to the installation box 201. When the operation plate 203a rotates, it drives the two guide grooves 203b to rotate synchronously. The guide grooves 203b are provided on the operation plate 203a, and the guide rods 203c are slidably connected to the guide grooves 203b. When the guide grooves 203b rotate, the guide rods 203c located in the guide grooves 203b will move, thereby causing the clamping plate 203d to move, and the guide rods 203c fixedly connected to the guide rods 203c will move. The clamping plate 203d will move toward or oppositely according to the rotation direction of the operating plate 203a, thereby adapting to the backpack straps 301 of different widths. A plurality of sockets 203e are provided on the installation box 201, and the pins 203f are inserted into the clamping plate 203d and the sockets 203e. When the backpack strap 301 is placed in the groove formed by the clamping plate 203d, the pins 203f will be inserted into the clamping plate 203d, the backpack strap 301 and the sockets 203e in turn, thereby connecting the backpack strap 301 and the installation component 203 together.

[0050] Specifically, one end of the guide groove 203b is far away from the center of the operating plate 203a, and the other end of the guide groove 203b is close to the center of the operating plate 203a, and the backpack strap 301 is located in the groove formed by the clamping plate 203d.

[0051] Furthermore, the operating component 204 includes a rotating disk 204a fixedly connected to the operating panel 203a. The user drives the operating panel 203a to rotate by operating the rotating disk 204a. A receiving groove 204b is provided on the installation box 201. The rotating disk 204a is rotatably connected to the receiving groove 204b. By providing the receiving groove 204b, the rotating disk 204a is partially located outside the installation box 201, which is convenient for operation.

[0052] As can be seen from the above, first operate the rotating disk 204a to drive the operating plate 203a to rotate, and through the cooperation of the guide groove 203b and the guide rod 203c, the two clamping plates 203d are moved in opposite directions, and the distance between the two clamping plates 203d is adjusted to be larger than the width of the backpack strap 301, and then the backpack strap 301 is placed in the groove formed by the clamping plate 203d, and then the rotating disk 204a is operated in reverse to move the two clamping plates 203d towards each other to clamp the backpack strap 301, and then use the pin 203f to insert the clamping plate 203d, the backpack strap 301 and the socket 203e in turn, and then the installation component 200 is connected to the backpack strap 301 together.

[0053] Embodiment 4:

[0054] The present invention provides a method for using a concealed alarm device, comprising the following steps:

[0055] S1: Place the mounting component 200 near the backpack strap 301, and make the backpack strap 301 located in the groove formed by the two clamping plates 203d;

[0056] S2: Turn the rotating disk 204a, the rotating disk 204a drives the operating plate 203a to rotate, and the guide slot 203b rotates synchronously with the operating plate 203a. The guide rod 203c is affected by the guide slot 203b to make the two clamping plates 203d approach each other until the clamping plates 203d are against the backpack belt 301, and then the pin 203f is inserted from the rear end of the clamping plate 203d. The pin 203f passes through the backpack belt 301 and enters the interior of the installation box 201 through the jack 203e. At this time, the alarm component 100 is fixed on the backpack belt 301 through the installation component 200;

[0057] S3: Rotate the adjustment plate 105e, the adjustment plate 105e moves on the telescopic cylinder 105c due to the thread, adjust the distance between the baffle 105a and the adjustment plate 105e, and then adjust the elasticity of the adjustment spring 105d, so that the force of squeezing the pressing rod 104b is suitable for the user's operation;

[0058] S4: putting the decoration 302 on the alarm component 100 and the installation component 200, and providing camouflage for the alarm component 100 through the decoration 302;

[0059] 5S: When a special situation occurs, the user holds the ornament 302 tightly with both hands, and the holding force will push the pressing rod 104b into the shell 101. As the pressing rod 104b moves, the edge of the adjustment groove 104c will contact the pressing rod 104b, and drive the trigger plate 104d to rotate during the movement of the pressing rod 104b. The trigger plate 104d rotates and touches the switch of the buzzer 103a, and the buzzer 103a emits a sound alarm to attract the attention of people around.

[0060] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and deform the above embodiments within the scope of the present invention.

[0061] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0063] In the drawings of the embodiments disclosed in the present invention, only the structures involved in the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

Claims

1. A concealed alarm device, characterized in that: include, An alarm component (100) comprises a housing (101), a closing cover (102) snap-fitted to the housing (101), and an alarm component (103), a trigger component (104) and an adjustment component (105) arranged in the housing (101); The installation component (200) comprises an installation box (201), an installation cover (202) snap-fitted to the installation box (201), the housing (101) snap-fitted to the installation cover (202), and an installation component (203) and an operating component (204) connected to the installation box (201); The decorative component (300) comprises a school bag strap (301) and a decorative ornament (302) sleeved on the alarm component (100) and the installation component (200).

2. A concealed alarm device as claimed in claim 1, characterized in that: The alarm component (103) comprises a buzzer (103a) fixedly installed in the housing (101), and sound transmission holes (103b) opened on the housing (101) and the closing cover (102).

3. A concealed alarm device as claimed in claim 2, characterized in that: The trigger assembly (104) comprises a pressing hole (104a) provided on the housing (101), a pressing rod (104b) slidably connected to the pressing hole (104a), an adjusting groove (104c) provided on the peripheral side of the pressing rod (104b), a trigger plate (104d) rotatably connected to the housing (101), and a trigger spring (104e) fixedly connected to the trigger plate (104d).

4. A concealed alarm device as claimed in claim 3, characterized in that: The trigger plate (104d) is a "Z"-shaped plate, one end of the trigger plate (104d) extends into the adjustment slot (104c), the other end of the trigger plate (104d) is fixedly connected to the trigger spring (104e), and the end of the trigger spring (104e) away from the pressing plate is fixedly connected to the housing (101).

5. A concealed alarm device as claimed in claim 4, characterized in that: The adjustment assembly (105) comprises a baffle (105a) fixedly connected to the pressing rod (104b), a telescopic rod (105b) fixedly connected to the baffle (105a), a telescopic tube (105c) slidably connected to the telescopic rod (105b), an adjustment spring (105d) sleeved around the telescopic rod (105b) and the telescopic tube (105c), an adjustment plate (105e) threadedly connected to the telescopic tube (105c), and a fixing plate (105f) fixedly connected to the telescopic tube (105c).

6. A concealed alarm device as claimed in claim 5, characterized in that: The two ends of the adjustment spring (105d) are respectively against the baffle plate (105a) and the adjustment plate (105e), and the fixing plate (105f) is fixedly connected to the housing (101).

7. A concealed alarm device as claimed in claim 6, characterized in that: The installation assembly (203) comprises an operating plate (203a) rotatably connected to the installation box (201), a guide groove (203b) provided on the operating plate (203a), a guide rod (203c) slidably connected to the guide groove (203b), a clamping plate (203d) fixedly connected to the guide rod (203c), a plurality of plug holes (203e) provided on the installation box (201), and plug pins (203f) inserted into the clamping plate (203d) and the plug holes (203e).

8. A concealed alarm device as claimed in claim 7, characterized in that: One end of the guide groove (203b) is away from the center of the operating plate (203a), and the other end of the guide groove (203b) is close to the center of the operating plate (203a). The backpack strap (301) is located in a groove formed by the clamping plate (203d).

9. A concealed alarm device as claimed in claim 8, characterized in that: The operating assembly (204) comprises a rotating disk (204a) fixedly connected to the operating panel (203a), and a receiving groove (204b) provided on the installation box (201), wherein the rotating disk (204a) is rotatably connected to the receiving groove (204b).

10. A method for using a concealed alarm device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: placing the mounting component (200) near the backpack strap (301), and placing the backpack strap (301) in a groove formed by two clamping plates (203d); S2: The rotating disk (204a) is turned, and the rotating disk (204a) drives the operating panel (203a) to rotate. At this time, the guide groove (203b) rotates synchronously with the operating panel (203a). The guide rod (203c) is affected by the guide groove (203b) to make the two clamping plates (203d) approach each other until the clamping plates (203d) and the backpack belt (301) are butted against each other. Then, the pin (203f) is inserted from the rear end of the clamping plate (203d). The pin (203f) passes through the backpack belt (301) and enters the interior of the installation box (201) through the jack (203e). At this time, the alarm component (100) is fixed on the backpack belt (301) through the installation component (200); S3: Rotate the adjustment plate (105e), the adjustment plate (105e) moves on the telescopic cylinder (105c) due to the thread, adjust the distance between the baffle (105a) and the adjustment plate (105e), and then adjust the elasticity of the adjustment spring (105d) so that the force of squeezing the pressing rod (104b) is suitable for the user's operation; S4: putting the decoration (302) on the alarm component (100) and the installation component (200), and using the decoration (302) to provide camouflage for the alarm component (100); 5S: When a special situation occurs, the user holds the ornament (302) tightly with both hands, and the force of holding will push the pressing rod (104b) toward the inside of the housing (101). As the pressing rod (104b) moves, the edge of the adjustment slot (104c) will contact the pressing rod (104b), and the trigger plate (104d) will rotate during the movement of the pressing rod (104b). The trigger plate (104d) rotates and touches the switch of the buzzer (103a), and the buzzer (103a) emits a sound alarm to attract the attention of people around.

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