JPH0645054U - Safeguard device for public telephones - Google Patents

Abstract

(57) [Abstract] [Purpose] Protects public telephones from vandalism by a thief in the safe, sounds an alarm when there is such an act, and
Providing a safe and anti-theft device for public telephones that automatically stops the alarm after a certain amount of time when the action is stopped. [Structure] A main body made of a plate body that wraps the lower part of the public telephone along the left side, the bottom, and the right side, and a front door that covers the front of the telephone and can be freely opened and closed around a hook hinge.
It is composed of a lock device for locking the front door to the main body, and an alarm device that detects the height of the bottom surface of the telephone and sounds a buzzer when the height exceeds a predetermined value. The alarm includes a detection lever 42 for detecting the height and a screw shaft 4
A switch lever 44 which is braked by friction by a spring inserted in 9, a micro switch 46 which is turned on by pressing a push button switch 46a, and a weight 47 which is loosely fitted to a support shaft 47a which receives vibration of a buzzer. And are equipped with. When the buzzer rings, a shocking force is periodically applied to the weight 47 by the vibration of the buzzer, the switch lever 44 rotates against friction, and the push button 46a is separated from the engaging portion 42b, and the buzzer rings. Stops.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device that protects a public telephone from vandalism for the purpose of a telephone charge safe and generates an alarm sound when the vandalism occurs.

[0002]

[Prior art]

 Since public telephones are often installed in unmanned places, they are vulnerable to vandalism using tools such as crowbars and saws for the purpose of telephone charges. There was a safeguarding device for public telephones to protect public telephones from such acts.

[0003]

[Problems to be solved by the device]

 In the conventional safeguarding device for public telephones, no measures have been taken to stop vandalism, so the actor can continue the action for a sufficient time, and Were often stolen. Therefore, an object of the present invention is to solve the problems left over in the conventional device, and immediately generate a warning sound when an act of vandalism occurs, and give the vandalist a shock of action detection to stop the act. At the same time, it is to provide a safe and theft protection device for a public telephone that automatically stops the generation of an alarm sound after a certain time has passed when the action is stopped.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides the following means. According to the first invention of the present application, by wrapping the portion of the public telephone (100) in which the safe is housed, that is, the lower portion of the telephone (100) from the front, both sides and the bottom with a plate-like body, the public telephone ( 100) is a device for protecting the public telephone from vandalism, wherein the plate-shaped body has a main body (1) provided along a left side surface, a bottom surface and a right side surface of the public telephone, and the main body (1) at a left end or a right end. ) Is attached by a hook hinge (5) to cover the front of the public telephone (100), and the front door (2) is attached to the main body (1) by a key locking operation. The front door (2) is locked to fix the front door (2) to the main body (1), and the front door (2) can be rotated about the hook hinge (5) by unlocking the key. The lock device (3) is attached to the lower side of the body (1), and the body (1 An alarm device (4) that detects the distance between the bottom plate of the public telephone and the bottom surface of the public telephone (100) through a detection hole (6) provided in the bottom plate and issues an alarm when the distance exceeds a predetermined value. ) And a public telephone safe burglar protection device.

According to the second invention of the present application, the alarm transmission time of the alarm device (4) is set by mechanical means in a timed manner, and the public of the first invention, which consumes less battery to generate an alarm sound. A safe and anti-theft device for the telephone is obtained.

According to the third invention of the present application, a mechanical means for timely setting the alarm sending time of the alarm device (4) is attached to the bottom plate and vertically extends downward from the bottom plate. The base angle (41) consisting of a body and a first spindle (43) attached to the base angle (41) parallel to the bottom plate are oscillated as a center to move the head from the detection hole (6). A detection lever (42) having at one end a detection part (42a) that comes out and comes into contact with the bottom face; and a force that urges the detection lever (42) by elastic force to constantly press the detection part (42a) to the bottom face. The pressing means (48) of No. 1 and the second support shaft (45) attached to the base angle (41) in parallel with the bottom plate are pivoted to move the second support shaft (45). Circular arcuate slot along the center arc A switch lever (44) having a switch 44a), and the switch lever (44) is fixed to the switch lever (44), and the push button (46a) comes into contact with the engaging portion (42b) of the detection lever (42) to turn it on and off. A switch (46) for switching between the switch and a weight (47) loosely attached to one end of the switch lever (44) by a third shaft (47a) parallel to the bottom plate; A buzzer (50) attached to (41) that sounds when a current flows, a power supply (51) that supplies the current to the buzzer (50) via the switch (46), and the circle A shaft (49) inserted into the arcuate slot (44a) and attached to the base angle (41) parallel to the bottom plate, and an elastic force which is inserted into the shaft (49). A second pressing means (49a) for pressing the switch lever (44) in the direction of the base angle (41) described above, and the detection unit (49a) until the interval reaches the predetermined value or more. 42a) moves upward, the engaging portion (42b) acts on the push button (46a) to turn on the switch (46), and the engaging portion (42b) further pushes the push button (46a). When the detection part (42a) rises until is pressed, the switch lever (44) near the arcuate slot (44a) and the base angle (41) or the second pressing means (49a) The switch lever (44) rotates in the first direction against the frictional force of the base, and when the rise of the detection unit (42a) is stopped, the buzzer (50) rings to generate the base. The switch lever (44) further gradually rotates in the first direction against the frictional force due to the vibration of the toggle (41) and the gravity of the weight (47), and the push button is timed. (46a) is released from the engaging portion (42b) to stop the output of an alarm sound, and a safe and theft protection device for a public telephone according to a second invention is obtained.

According to the fourth invention of the present application, when the detection part (42a) is in the lowered state, the gap between the engagement part (42b) and the push button (46a) is in the OFF state of the switch (46). The switch lever (44) is provided with an engagement protrusion (44b) that defines a minimum distance that allows the switch lever (44) to interact with the switch lever (44) at any position. The third aspect of the present invention provides a safe and burglar protection device for a public telephone, which is characterized in that when the position is returned to the initial state and a subsequent sabotage is performed, an alarm can be immediately issued.

[0008]

[Action]

 The present invention is provided with an alarm device that stops ringing by a mechanical mechanism after a predetermined time when the vandalism ends. In this alarm, the detection lever detects the distance between the bottom of the public telephone and the bottom plate of the main body. When the switch lever that tries to maintain a certain position by frictional force is pushed by the detection lever and rotates in the first direction (for example, counterclockwise direction), the push button is pushed and the switch (46) is turned on. And the buzzer begins to ring. At this time, when the act of vandalism is stopped, the switch lever remains at the position at that time due to the frictional force, and the buzzer continues to ring, but the vibration of the buzzer is intermittently applied to the weight, resulting in continuous weight loss. A kind of impact force greater than the gravity is periodically applied to the switch lever, and the switch lever is further gradually rotated in the first direction (eg, counterclockwise direction). When the switch lever rotates in the first direction by a certain angle, the push button of the switch is released from the engaging portion of the detection lever, the switch is turned off, and the buzzer stops ringing.

[0009]

【Example】

 Next, the present invention will be described in more detail with reference to examples. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a plan view of the embodiment of FIG. 1, FIG. 3 is a right side view of the embodiment of FIG. 1, and FIG. 4 is provided on an alarm device 4 of FIG. 1 is a partial right side view of the embodiment shown in FIG. 1 for explaining the movement of the detection lever, FIG. 5 is a plan view showing the internal structure of the lock device 3 in FIG. 1, and FIG. Sectional drawing, FIG. 7 is a sectional view of the lock device for explaining the operation of the lock device 3 in FIG. 1, FIG. 8 is a front view showing the internal structure of the alarm device 4 in FIG. 1, and FIG. 9 is the alarm of FIG. 10 is a front view for explaining the operation of the alarm device, FIG. 10 is a sectional view of the alarm device taken along the line II-II of FIG. 8, FIG. 11 is a sectional view taken along the line III-III of FIG. 9, and FIG. 2 is a plan view (a) and a front view (b) showing FIG. 2, and FIG. 13 is a plan view (a) of the main body 1 of the portion constituting the hook hinge 5 in FIG. A fine front view (b).

The embodiment shown in FIG. 1 is a safe and anti-theft device for a public telephone attached to a public telephone. This embodiment comprises a main body 1, a front door 2, a lock device 3 and an alarm device 4. As shown by the two-dot chain line in FIG. 2, a public telephone 100 is fitted in the main body 1. The telephone 100 has two holes in a plate corresponding to the bottom of the telephone. Female screws 7a and 7b are provided on the bottom plate of the main body 1 corresponding to the two holes. Therefore, the main body 1 is fixed to the telephone 100 by inserting bolts into the two holes on the bottom surface of the telephone 100, fitting them into the female screws 7a and 7b, and tightening them. The public telephone is fixed to a strong fixed object called a back plate by bolting on the back side, and the left and right side surfaces, the bottom surface and the front surface are opened. Therefore, the main body 1 and the front door 2 are shown in FIG. It is mounted as shown in FIG.

The left end of the front door 2 and the main body 1 are connected by a hook hinge (5) 5, and the front door 2 can be opened and closed within a range of about 90 degrees around the hook hinge 5. As shown in the plan view of FIG. 12A and the front view of FIG. 12B, the front door 2 has protrusions 2a and 2b at the left end. Further, the main body 1 of the portion forming the hook hinge 5 has an L-shaped bent portion 1a as shown in the plan view (portion) of FIG. 13 (a) and the front view of FIG. 13 (b). The L-shaped bent portion 1a is provided with hooking holes 1a and 1b. By inserting the protrusions 2a and 2b (FIG. 12B) of the front door 2 into the hooking holes 1a and 1b, respectively, and by fitting the protrusions 2a and 2b into the hooking holes 1a and 1b, the hooking hinge 5 Is formed. In the conventional public telephone protection device, as a means for connecting the front door 2 and the main body 1, a general hinge structure having a rotating shaft is adopted. The hinge with a general structure in which the edge is formed in a rectangular wave shape and each protrusion on the rectangular wave edge is wound around the rotating shaft was easily broken by a burl, a metal saw, or the like. On the other hand, the hook hinge used in this embodiment has a large length in the vertical direction of the protrusions 2a and 2b and is tough, and is difficult to bend and cut, so that it has excellent fracture resistance. Further, a bar 1b covering the projections 2a and 2b is fixed to the main body 1 by welding so that the burl or the like cannot contact the projections 2a and 2b.

The front door 2 is provided with an opening 22 through which a caller can come in contact with the refund port and the emergency call button of the telephone 100. The right end of the front door 2 is fitted into the lock device 3. When the lock of the lock device 3 is locked with a key, the front door 2 is fixed to the main body 1 while covering the lower front part of the telephone 100, and protects the safe housed in the lower part of the telephone 100 from theft. To take out the safe, the lock of the lock device 3 is unlocked, the front door 2 is opened about 90 degrees, and the lock of the safe door at the lower front of the telephone 100 is unlocked.

The internal structure of the lock device 3 is shown in detail in FIGS. 5, 6 and 7. FIG. 5 is a plan view of the lock cover 31 cut at a position close to the right side surface of the main body 1 in parallel with the right side surface. The lock device 3 includes a lock 30, a lock cover 31, a lock lever 32, a support shaft 33 of the lock lever 32, an inclined cam 34, and springs 35a and 35b. When the key is inserted into the key insertion hole 30a of the lock 30 and the shaft 30b is rotated, the lock lever 30c rotates integrally with the shaft 30b, and the engagement protrusion 30d provided at the tip of the lock lever 30c rotates. Move. Now, as shown in FIG. 6, it is assumed that the tip of the lock lever 32 is fitted into the engaging hole 21 of the front door 2 and the front door 2 is locked by the lock device 3. At this time, when the shaft 30b is rotated clockwise by about 90 degrees with the key, the lock lever 30c and the engaging projection 30d reach the position shown in FIG. Between the state of FIG. 6 and the state of FIG. 7, the engaging projection 30d pushes up the inclined cam plate 34 while contacting the inclined cam plate 34. Since the inclined cam plate 34 is screwed to the lock lever 32, when the inclined cam plate 34 is pushed up, the lock lever 32 is also pushed up, and the tip of the lock lever is disengaged from the engaging hole 21 of the front door 2 2 is released from the lock device 3 and is in a state where it can be opened.

In order to lock the opened front door 2, the front door is closed and brought into the state of FIG. 7, the key is inserted into the key insertion hole 30a, and the key is rotated counterclockwise by about 90 degrees. Since one end of the lock lever 32 is pulled toward the cut-and-raised portion 11 of the main body by the springs 35a and 35b, when the lock lever 30c and the engaging protrusion 30d are rotated in the locking direction by the key, the lock lever 32 is locked. 32 rotates around the support shaft 33, the tip of the lock lever 32 is fitted into the engaging hole 21, and the locking of the front door 2 is completed.

The detailed internal structure of the alarm device 4 is shown in FIGS. The alarm device 4 includes a base plate 40, one surface (bottom surface) of which is welded to the base plate 40, and a base angle 41 made of a plate material that extends downward from the bottom surface at a right angle, a detection lever 42, and a base angle. A support shaft 43, one end of which is screwed to 41 and serves as a rotation center of the detection lever 42, a switch lever 44 made of a plate material, and one end of which is screwed to the base angle 41, which serves as a rotation center of the switch lever 44. A support shaft 45, a micro switch 46 fixed to the switch lever 44, a weight 47, a support shaft 47a screwed to the switch lever 44 and rotatably supporting the weight 47, and a spring 48. The screw shaft 49, the spring 49a, the buzzer 50 attached to the base angle 41, the battery 51, and the buzzer 50 so that the alarm sound of the buzzer 50 leaks to the outside. Numerous consists cover 52 provided with a small hole in the vicinity of -5 0.

The base plate 40 has two longitudinal edges inserted into two parallel grooves provided on the lower surface of the main body 1, and the two U-shaped notches illustrated at the left end of FIG. 10 are screwed together. It is fastened with and fixed to the lower surface of the main body 1. The base plate 40 has a detection hole 40a. The base plate 40 is fixed to the bottom of the main body 1 at a position where the detection hole 40a coincides with the detection hole 6 (FIG. 2) provided in the bottom plate of the main body 1.

As shown in FIG. 11, the detection lever 42 is formed by bending a plate material into a U shape, receives a rotational force constantly by a spring 48, and has one end forming a detection portion 42a, and the detection portion 42a is , Is in contact with the bottom surface of the telephone 100 through the detection holes 40a and 6. When the telephone 100 is in a steady state (initial position), the level of the detection unit 42a is L0. When the telephone 100 is tilted with a large force due to vandalism and its bottom surface rises, the level of the detection unit 42a changes. For example, in L1. The engagement protrusion 44b is formed by bending a part of the upper side of the switch lever 44, and the engagement protrusion 41b is formed by bending a part of the upper side of the base angle 41. When the detection portion 42a protrudes higher than the level L0, the other end (the left end in FIG. 8) of the detection lever 42 contacts the engagement protrusion 41b and stops. Further, when the detecting portion 42a is pushed down by the bottom surface of the telephone 100 and the other end of the detecting lever 42 rises, the other end comes into contact with the engaging projection 44b, and the switch lever 44 is rotated clockwise (in FIG. 8). Let

The switch lever 44 is a plate body that swings around a support shaft 45. The switch lever 44 is provided with an arcuate slot 44a whose contour is defined by an arc centered on the support shaft 45. A screw shaft 49, which is erected by a screw on the base angle 41, is inserted through the arcuate slot 44a. As shown in FIG. 11, a spring 49a is coaxially provided on the screw shaft 49, and the spring 49a pushes the switch lever 44 toward the base angle 41. Therefore, when the switch lever 44 swings around the support shaft 45, it receives resistance due to frictional force.

A support shaft 47a is erected at one end (left end in FIG. 8) of the switch lever 44 with a screw, and a columnar weight 47 is loosely inserted coaxially through the support shaft 47a. One end of the support shaft 47a slightly penetrates the switch lever 44 and is in light contact with the base angle 41. The position where one end of the support shaft 47a contacts the base angle 41 is on the back side of the buzzer 50. When the buzzer 50 sounds, the base angle 41 vibrates, and when the base angle 41 vibrates, one end of the support shaft 47a comes into contact with or separates from the base angle 41 at a vibration cycle. At this time, the weight 47 is vibrated from the base angle 41, so that an impulsive force is periodically applied. At this time, the switch lever 44 receives the shocking vibration on the dead weight of the weight 47 and rotates in the gravity direction of the weight 47 against the frictional force of the spring 49a.

A micro switch 46 is fixed to the switch lever 44. When the push button 46a of the micro switch 46 is pressed, the micro switch 46 is turned on, current flows from the battery 51 to the buzzer 50, and the buzzer 50 sounds. When the push button 46a is opened, the micro switch 46 is turned off, the current circuit between the battery 51 and the buzzer 50 is cut off, and the buzzer 50 stops ringing. When the detection lever 42 and the switch lever 44 are in the posture relationship depicted by the chain double-dashed line in FIG. 8, the push button 46a is brought into contact with the engaging portion 42b, which is a part of the lower surface of the detection lever 42, and is pushed down. It When the engaging portion 42b tries to push down the push button 46a, a moment to rotate the switch lever 44 around the support shaft 45 acts on the switch lever 44, but the switch lever 44 moves due to the friction of the spring 49a. The posture at that time is maintained for a while, the push button 46a is sufficiently pressed, and the micro switch 44 is turned on.

When the telephone 100 and the main body 1 are in the steady state and the detecting portion 42a is at the level L0 in FIG. 8, the engaging protrusion 44b is pulled up by the left end of the detecting lever 42 (FIG. 8), and the switch lever 44 Takes the posture shown in FIG. At this time, the screw shaft 49 is located near the lower end of the arcuate groove hole 49a. The push button 46a is close to the engaging portion 42b, but is not pressed. This state is the initial state. When the left end of the detection lever 42 (FIG. 8) is in contact with the engagement protrusion 44b, the distance between the engagement portion 42b and the push button 46a is set to the minimum distance that allows the micro switch 46 to be turned off. The position of the engaging projection 44b is set at.

It is assumed that when the alarm device 4 is in the initial state, there is a sabotage or the like, and the detection unit 42a rises from the level L 0 by D1 to reach the level L1. Then, the engaging portion 42b presses the push button 46a, and the buzzer 50 sounds. When the buzzer 50 sounds, the switch lever 44 receives a moment that overcomes the friction from the weight 47 and starts rotating counterclockwise (FIG. 8). The limit of rotation of the switch lever 44 is until the engagement protrusion 44b contacts the left end (FIG. 8) of the detection lever 42. When the switch lever 44 is rotated until just before the engagement protrusion 44b comes into contact with the left end (FIG. 8) of the detection lever 42, the push button 46a is separated from the engagement portion 42b and enters the state shown in FIG. FIG. 9 shows the state in which the level of the detection unit 42a is changed to L3. At this time, the micro switch 46 is turned off, the buzzer 50 stops ringing, and the alarm device 4 is in the initial state. As described above, in this embodiment, when the micro switch 44 is activated and turned ON, the buzzer 50 sounds, and the micro switch 44 is turned OFF again and the buzzer 50 stops sounding, the alarm device 4 is always in the initial state. Return to. Therefore, in the present embodiment, the alarm device 4 returns to the initial state when the buzzer 50 stops ringing regardless of the position of the detection unit 42a when the sabotage is stopped, and then the sabotage is performed again. There can be an audible alarm as well.

In the state of FIG. 9, when the sound of the buzzer is stopped, the telephone 100 is swayed again, the relative position between the telephone 100 and the main body 1 is changed, and the detection unit 42a is set to level L0. When returning to the position of, the alarm device 4 returns to the initial state of FIG. 8 again. Therefore, if the sabotage is further continued, the buzzer 50 sounds again for a certain period of time and issues an alarm.

The alarm device 4 shown in FIGS. 8 to 11 mechanically gives a resistance to the rotation of the switch lever 44 by the spring 49a, and the engagement portion 42b allows the push button 46a to be pushed by the resistance. When the push button 46a is pressed and the buzzer 50 rings, the ring resistance reduces the rotation resistance of the switch lever 44, and the weight of the weight allows the switch lever 44 to rotate, so that the switch lever 44 rotates to some extent. The push button 46a is released from the engaging portion 42b, and the buzzer 50 stops ringing. With the configuration of the alarm device 4, it is possible to generate an alarm sound when there is vandalism, and to automatically stop the alarm sound when the vandalism is stopped for a certain period of time.

[0025]

[Effect of device]

 As described above in detail with reference to the embodiments, according to the present invention, when a sabotage is performed, an alarm sound is immediately generated to give the actor a shock to detect the act and stop the act. It is possible to provide a safe and burglar protection device for a public telephone that automatically stops the generation of an alarm sound after a certain time has elapsed when the action is stopped. In addition, the alarm sound can be stopped for a limited period of time, so battery consumption is low and there is no annoyance to the neighborhood due to the alarm sound. Further, the device of the present invention has a hook hinge for the opening / closing mechanism of the front door, and thus has excellent resistance to breakage. Therefore, the adoption of the present invention can significantly improve the crime prevention performance of public telephones.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a plan view of the embodiment shown in FIG.

FIG. 3 is a right side view of the embodiment shown in FIG.

4 is a partial right side view of the embodiment of FIG. 1 for explaining the movement of a detection lever provided in the alarm device 4 in FIG.

5 is a plan view showing the internal structure of the lock device 3 in FIG. 1. FIG.

6 is a cross-sectional view taken along the line I-I of FIG.

7 is a sectional view of the lock device for explaining the operation of the lock device 3 in FIG.

FIG. 8 is a front view showing the internal structure of the alarm device 4 in FIG.

9 is a front view for explaining the operation of the alarm device of FIG.

10 is a view of the alarm device of FIG. 8 taken along the line II-II.

11 is a sectional view taken along the line III-III in FIG.

FIG. 12 is a plan view (a) and a front view (b) showing the front door 2 in FIG.

FIG. 13 is a plan view (a) and a front view (b) of the main body 1 of a portion forming the hook hinge 5 in FIG. 1.

[Explanation of symbols]

 1 Main body 2 Front door 3 Lock device 4 Alarm device 5 Hooking hinge 6 Detection hole 7 Reinforcing plate 7a, 7b Female screw 11 Cut-and-raised part of main body 12 Bottom plate 21 Engagement hole 22 Front door opening 30 Lock 30a Key insertion hole 30b Lock Shaft 30c Lock lever 30d Engagement protrusion 30e Lock cover 30f Protect plate 31 Lock cover 32 Lock lever 32a Lock lever angular hole 33 Support shaft 34 Inclined cam plate 35a, 35b Spring 40 Base plate 40a Detection hole 41 Base angle 41b Engagement protrusion 42 detection lever 42a detection part 42b engagement part 43 support shaft 44 switch lever 44a arcuate slot 44b engagement protrusion 45 support shaft 46 micro switch 46a push button 47 weight 47a support shaft 48 spring 49 screw shaft 49a spring 50 buzzer 51 Battery 52 Cover 100 Phone D Level interval L0, L1, L3 telephone bottom plate of the telephone set and the body

Claims (4)

[Scope of utility model registration request] 1. A device for protecting a public telephone from vandalism by wrapping a lower portion of the public telephone from the front, both side surfaces and the bottom with a plate, wherein the plate is the left side and the bottom of the public telephone. And a main body provided along the right side surface, a front door attached to the main body at the left end or the right end with a hook hinge to cover the front surface of the public telephone, and the front door is locked to the main body by a key locking operation. A lock device for fixing the front door to the main body by means of an unlocking operation of the key so that the front door can be rotated around the hook hinge, and the lock device is attached to the lower side of the main body. A public telephone that is provided with an alarm device that detects a gap between the bottom plate of the main body and the bottom face of the public telephone through a detection hole provided in the bottom plate and that issues an alarm when the gap exceeds a predetermined value. Safe theft protection device 2. The safe and burglar protection device for a public telephone according to claim 1, wherein the alarm transmission time of the alarm device is set in a timed manner by mechanical means. 3. A base angle, which is a plate member attached to the bottom plate and vertically protruding downward from the bottom plate, and mechanical means for setting the alarm sending time of the alarm device in a timely manner. A detection lever having at one end a detection portion that swings in parallel about a first support shaft attached to the base angle and that extends out of the detection hole and comes into contact with the bottom surface of the detection lever; A first pressing unit that constantly urges the detection unit against the bottom surface by urging the lever, and a second supporting shaft that is attached to the base angle in parallel with the bottom plate and swings around the second supporting shaft. A switch lever having an arcuate groove hole having a contour along an arc centered on the support shaft, and a switch button fixed to the switch lever and brought into contact with the engaging portion of the detection lever by a push button to turn on and off.
A switch for switching to F, a weight loosely attached to one end of the switch lever by a third shaft parallel to the bottom plate, and a weight attached to the base angle so that a current flows. A ringing buzzer, a power supply for supplying the current to the buzzer via the switch, a shaft inserted into the arcuate slot and attached to the base angle parallel to the bottom plate, A second pressing means which is inserted and elastically presses the switch lever in the direction of the base angle, wherein when the detection unit rises by the time the distance reaches the predetermined value or more. When the engaging portion acts on the push button to turn on the switch, and the detecting portion rises until the engaging portion further presses the push button, The switch lever rotates in the first direction against the frictional force between the switch lever and the base angle or the second pressing means in the vicinity of the arcuate slot, and the ascending of the detection unit is stopped. Occasionally, the switch lever further gradually rotates in the first direction against the frictional force due to the vibration of the base angle caused by the buzzer sounding and the gravity caused by the weight. 3. The safe and burglar protection device for a public telephone according to claim 2, wherein the alarm sound is released when released from the engaging portion. 4. The switch is OFF when the distance between the engagement portion and the push button is OFF when the detection portion is in a lowered state.
4. The safe and burglar protection device for a public telephone according to claim 3, wherein the switch lever is provided with an engagement protrusion 44b which defines a minimum distance for keeping the state.