Safety hammer with switch anti-theft alarm function

Abstract

The utility model belongs to the technical field of safety hammers, and particularly relates to a safety hammer with a switch anti-theft alarm, the bottom of a base is also provided with a movable cavity, the movable cavity is positioned on the side surface of a wiring terminal, a push plate is movably arranged in the movable cavity, a push rod and a spring are fixed on the surface of the push plate, the spring is sleeved outside the push rod, and the switch anti-theft alarm is arranged in the movable cavity. The end part of the push rod extends out of the base and is fixedly provided with a first magnet, and the surface of the hammer body is fixedly provided with a second magnet corresponding to the first magnet; when the hammer body is taken down, the push plate enables the copper contact piece to be in contact with the contact under the action of the spring, so that the alarm is switched on to give an alarm, and the problem that when the hammer body is traditionally installed on the base and the normally-closed switch is pressed, the normally-closed switch is switched on and the alarm gives an alarm when the hammer body is loosened is solved; meanwhile, the first magnet and the second magnet which are fixed through magnetic force are adopted, and the stability of the hammer body installed on the base is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of safety hammers, in particular to a safety hammer with a switch for anti-theft alarm. Background Art

[0002] As people's living standards continue to improve, cars have become the preferred means of transportation for many people. However, this brings with it the hidden danger of frequent traffic accidents. In order to allow people to break the glass and escape in the event of an accident inside the car, a safety hammer is usually installed on the glass inside the car. Buses and coaches are equipped with safety hammers. The safety hammer is mounted on the body of the vehicle through a base. When in use, the safety hammer is directly removed and struck on the glass.

[0003] When using the existing safety hammer with a switch anti-theft alarm, the hammer body is installed on the base to press the normally closed switch, so that the normally closed switch is disconnected. Due to the shaking of the vehicle body, the pressure of the hammer on the normally closed switch may become loose, causing the normally closed switch to turn on the alarm. At the same time, the pressing of the normally closed switch by the hammer body may also easily cause the installation of the hammer body to be unstable. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the utility model provides a safety hammer with a switch anti-theft alarm. The specific technical solution is as follows:

[0005] A safety hammer with a switch anti-theft alarm includes a base and a hammer body installed on the base, a wiring terminal is provided at the bottom of the base, two contacts are provided on the wiring terminal, and the two contacts are electrically connected by two wires, a movable cavity is also provided at the bottom of the base, and the movable cavity is located on the side surface of the wiring terminal, a push plate is movably installed in the movable cavity, a push rod and a spring are fixed on the surface of the push plate, the spring is sleeved on the outside of the push rod, the end of the push rod extends to the outside of the base and is fixed with a first magnet, a second magnet corresponding to the first magnet is fixed on the surface of the hammer body, and the first magnet and the second magnet are fixed by magnetic force, a copper contact is fixed on the side surface of the push plate close to the contact, a pull rope is fixed on the hammer body, and a winding mechanism for winding the pull rope is provided at the bottom of the base.

[0006] Preferably, the winding mechanism includes a coil spring arranged at the bottom of the base, the end of the pull rope is fixed to the coil spring, the bottom of the base is rotatably installed with a first guide wheel and a second guide wheel for guiding the pull rope, and the distance between the first guide wheel and the second guide wheel is smaller than the diameter of the pull rope, and the bottom of the base is provided with a clamping member for preventing the pull rope from being recovered after being stretched.

[0007] Preferably, the clamping member includes a rib provided at the bottom of the base for supporting the pull rope, and a vertical guide groove opened at the bottom of the base, a locking wheel is provided on the side of the rib, and the shaft of the locking wheel is slidably installed in the guide groove.

[0008] Preferably, an anti-slip convex strip is provided in the middle of the locking wheel, and retaining rings are provided at both ends of the locking wheel.

[0009] Preferably, the first magnet and the second magnet are both circular structures.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. Through the movable cavity set at the bottom of the base, the push plate movably installed in the movable cavity is facilitated to bring the copper contact piece close to the contact under the action of the spring, so that the push plate is convenient for short-circuiting the two contacts set on the terminal. The push rod fixed on the side surface of the push plate and the first magnet fixed at the end of the push rod make it possible for the second magnet fixed on the surface of the hammer to attract the first magnet through magnetic force when the hammer is installed on the base, so that the first magnet moves the push rod, so that the push rod is separated from the contact with the copper contact piece through the push plate, thereby realizing the disconnection of the two contacts set on the terminal, so that when the hammer is installed on the base , the two wires connected to the alarm are disconnected, and when the hammer is removed, the push plate makes the copper contact piece contact with the contact under the action of the spring, so that the alarm is turned on and the alarm is sounded, which solves the problem that when the hammer is installed on the base and the normally closed switch is pressed, the normally closed switch will be closed when the hammer is loose, causing the alarm to sound an alarm. At the same time, the first magnet and the second magnet fixed by magnetic force are used to further increase the stability of the hammer installed on the base. The reel provided at the bottom of the base makes it easy for the reel to reel in the pull rope, avoiding the problem that the pull rope is too long when the hammer is installed on the base and the people in the car pull it by mistake.

[0012] 2. The winding mechanism composed of a pull rope, a coil spring, a first guide wheel, a second guide wheel and a clamping piece makes it convenient to clamp the pull rope through the clamping piece after it is pulled out, so that the clamping piece fixes the length of the pull rope, and the first guide wheel and the second guide wheel are used to guide the pull rope to increase the stability of the pull rope when it is pulled out, and the coil spring is used to reel the pull rope after it is pulled out.

[0013] 3. Through the clamping part composed of a locking wheel, a guide groove and a rib, the shaft of the locking wheel is slidably installed in the inside of the guide groove, and the locking wheel is located on the side of the rib, so that when the pull rope is pulled downward, it approaches the locking wheel, causing the locking wheel to slide to the bottom of the guide groove to release the rope; when the winding spring brings the pull rope to be retracted upward, the pull rope approaches the locking wheel, and brings the locking wheel to slide to the top of the guide groove, so that the locking wheel and the rib cooperate to clamp the pull rope. When the pull rope needs to be retracted, a downward force is applied to the locking wheel, so that the locking wheel is always located below the guide groove. At this time, the pull rope slowly moves upward under the action of the winding spring, thereby achieving the purpose of rope reeling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0015] Figure 2 This is a side structural diagram of the present utility model;

[0016] Figure 3 This is a schematic diagram of the base structure in the present utility model;

[0017] Figure 4 for Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0018] Figure 5 for Figure 3 Schematic diagram of the enlarged structure at B in the middle;

[0019] Figure 6 for Figure 5 Schematic diagram of the forces acting on the draw rope and the locking wheel when the middle draw rope is pulled out;

[0020] Figure 7 for Figure 5 Schematic diagram of the force acting on the pull rope when the middle pull rope is wound;

[0021] Figure 8 for Figure 5 Schematic diagram of the forces acting on the rope and the locking wheel when the middle rope is clamped;

[0022] Figure 9 This is a schematic diagram of the lock wheel and guide groove structure in the utility model.

[0023] Figure numerals: 1. base; 2. hammer body; 3. terminal; 4. wire; 5. movable cavity; 6. push plate; 7. copper contact; 8. push rod; 9. spring; 10. first magnet; 11. second magnet; 12. contact; 13. pull rope; 14. coil spring; 15. locking wheel; 16. guide groove; 17. rib; 18. first guide wheel; 19. second guide wheel, 20. protective cover. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present utility model are described below.

[0025] See also Figure 1-9The utility model provides a technical solution: a safety hammer with a switch anti-theft alarm, comprising a base 1 and a hammer body 2 installed on the base 1, a wiring terminal 3 is provided at the bottom of the base 1, two contacts 12 are provided on the wiring terminal 3, and the two contacts 12 are electrically connected through two wires 4, a movable cavity 5 is also provided at the bottom of the base 1, and the movable cavity 5 is located on the side surface of the wiring terminal 3, a push plate 6 is movably installed in the movable cavity 5, a push rod 8 and a spring 9 are fixed on the surface of the push plate 6, the spring 9 is sleeved on the outside of the push rod 8, the end of the push rod 8 extends to the outside of the base 1 and is fixed with a first magnet 10, a second magnet 11 corresponding to the first magnet 10 is fixed on the surface of the hammer body 2, and the first magnet 10 and the second magnet 11 are fixed by magnetic force, a copper contact piece 7 is fixed on the side surface of the push plate 6 near the contact 12, a pull rope 13 is fixed on the hammer body 2, and a winding mechanism for winding the pull rope 13 is provided at the bottom of the base 1.

[0026] In this embodiment, the movable cavity 5 is provided at the bottom of the base 1, so that the push plate 6 movably installed in the movable cavity 5 can bring the copper contact piece 7 close to the contact 12 under the action of the spring 9, so that the push plate 6 can short-circuit the two contacts 12 provided on the terminal 3. The push rod 8 fixed on the side surface of the push plate 6 and the first magnet 10 fixed at the end of the push rod 8 make it possible for the second magnet 11 fixed on the surface of the hammer body 2 to attract the first magnet 10 through magnetic force when the hammer body 2 is installed on the base 1, so that the first magnet 10 moves with the push rod 8, so that the push rod 8 is separated from the contact 12 with the copper contact piece 7 through the push plate 6, thereby realizing the disconnection of the two contacts 12 provided on the terminal 3, thereby making the hammer When the hammer body 2 is installed on the base 1, the two wires 4 connected to the alarm are disconnected. When the hammer body 2 is removed, the push plate 6 makes the copper contact piece 7 contact with the contact 12 under the action of the spring 9, so that the alarm is turned on and an alarm is sounded. This solves the problem that when the hammer body 2 is installed on the base 1 and the normally closed switch is pressed, when the hammer body 2 is loose, the normally closed switch will be closed, causing the alarm to sound an alarm. At the same time, the first magnet 10 and the second magnet 11 are fixed by magnetic force to further increase the stability of the hammer body 2 installed on the base 1. The reel provided at the bottom of the base 1 facilitates the reel to reel in the pull rope 13, avoiding the problem that the pull rope 13 is too long when the hammer body 2 is installed on the base 1 and the people in the car accidentally pull it.

[0027] Specifically, the reeling mechanism includes a coil spring 14 disposed at the bottom of the base 1. The end of the pull rope 13 is fixed to the coil spring 14. A first guide wheel 18 and a second guide wheel 19 are rotatably mounted on the bottom of the base 1 for guiding the pull rope 13. The distance between the first guide wheel 18 and the second guide wheel 19 is smaller than the diameter of the pull rope 13. A clamping member is provided at the bottom of the base 1 to prevent the pull rope 13 from being retracted after being stretched. In this embodiment, the reeling mechanism, consisting of the pull rope 13, coil spring 14, first guide wheel 18, second guide wheel 19, and clamping member, facilitates clamping of the pull rope 13 by the clamping member after it is pulled out, thereby fixing the length of the pull rope 13. The first guide wheel 18 and second guide wheel 19 guide the pull rope 13, increasing its stability during pulling, while the coil spring 14 rewinds the pull rope 13 after it is pulled out. A protective cover 20 is provided within the base 1. The protective cover 20 covers the reeling mechanism on the bottom of the base 1, thereby increasing its service life and facilitating maintenance of the reeling mechanism.

[0028] Specifically, the clamping member includes a rib 17 provided at the bottom of the base 1 for supporting the pull rope 13, and a vertical guide groove 16 provided on the base 1. A locking wheel 15 is provided on the side of the rib 17, and the shaft of the locking wheel 15 is slidably installed in the guide groove 16. An anti-slip ridge is provided in the middle of the locking wheel 15, and retaining rings are provided at both ends of the locking wheel 15. In this embodiment, vertical guide grooves 16 are provided on both the base 1 and the protective cover 20. The clamping member is composed of the locking wheel 15, the guide groove 16 and the rib 17. The shaft of the locking wheel 15 is slidably installed inside the guide groove 16, and one end of the shaft of the locking wheel 15 located in the guide groove 16 in the protective cover 20 protrudes outward to facilitate the application of downward pressure. The end of the shaft is in the shape of a ball head; at the same time, the locking wheel 15 is located on the side of the rib 17. When the pull rope 13 is pulled out, as shown in FIG. Figure 6 As shown, when the pull rope 13 is pulled downward, the surface of the pull rope 13 is in contact with the locking wheel 15, thereby driving the locking wheel 15 to slide below the guide groove 16, thereby pulling out the pull rope. Figure 8 As shown, when the pull rope 13 loses its downward pulling force, the coil spring 14 pulls the pull rope 13 upwards, and at this time the pull rope 13 with the locking wheel 15 on its surface slides toward the top of the guide groove 16, so that the locking wheel 15 and the retaining edge 17 cooperate to clamp the pull rope 13. Figure 7 As shown, a downward force is applied to the end of the shaft that passes through the protective cover 20, so that the locking wheel 15 is always located below the guide groove 16. At the same time, the pull rope 13 slowly moves upward under the action of the winding spring 14, thereby achieving the purpose of winding the pull rope 13. After the winding is completed, the locking wheel 15 is released.

[0029] Specifically, the first magnet 10 and the second magnet 11 are both circular in structure. In this embodiment, the first magnet 10 and the second magnet 11 are attracted to each other by magnetic force when they are close to each other.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A safety hammer with a switch anti-theft alarm, comprising a base (1) and a hammer body (2) mounted on the base (1), characterized in that: The bottom of the base (1) is provided with a terminal (3), and the terminal (3) is provided with two contacts (12), and the two contacts (12) are electrically connected through two wires (4). The bottom of the base (1) is also provided with a movable cavity (5), and the movable cavity (5) is located on the side surface of the terminal (3). A push plate (6) is movably installed in the movable cavity (5), and a push rod (8) and a spring (9) are fixed on the surface of the push plate (6), and the spring (9) is sleeved on the outside of the push rod (8). The end of the push rod (8) extends to the outside of the base (1) and is fixed with a first magnet (10), the surface of the hammer body (2) is fixed with a second magnet (11) corresponding to the first magnet (10), and the first magnet (10) and the second magnet (11) are fixed to each other by magnetic force, the side surface of the push plate (6) close to the contact (12) is fixed with a copper contact piece (7), the hammer body (2) is fixed with a pull rope (13), and the bottom of the base (1) is provided with a winding mechanism for winding the pull rope (13).

2. A safety hammer with a switch anti-theft alarm according to claim 1, characterized in that: The winding mechanism includes a coil spring (14) arranged at the bottom of the base (1), the end of the pull rope (13) is fixed to the coil spring (14), the bottom of the base (1) is rotatably mounted with a first guide wheel (18) and a second guide wheel (19) for guiding the pull rope (13), and the spacing between the first guide wheel (18) and the second guide wheel (19) is smaller than the diameter of the pull rope (13), and the bottom of the base (1) is provided with a clamping member for preventing the pull rope (13) from being retracted after being stretched.

3. The safety hammer with a switch anti-theft alarm according to claim 2, characterized in that: The clamping member comprises a rib (17) provided at the bottom of the base (1) for supporting the pull rope (13), and a vertical guide groove (16) provided at the bottom of the base (1); a locking wheel (15) is provided on the side of the rib (17), and the shaft of the locking wheel (15) is slidably installed in the guide groove (16).

4. The safety hammer with a switch anti-theft alarm according to claim 3, characterized in that: The middle of the locking wheel (15) is provided with an anti-slip convex strip, and both ends of the locking wheel (15) are provided with retaining rings.

5. The safety hammer with a switch anti-theft alarm according to claim 1, characterized in that: The first magnet (10) and the second magnet (11) are both circular structures.

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