CN201923062U - Fixed type safety hammer - Google Patents

Abstract

The utility model discloses a fixed safety hammer, which comprises a hammer head, the hammer head is connected to the top of an elastic connecting rod, the bottom of the elastic connecting rod is sleeved in a fixed base through a rotating shaft and can Internal rotation. The utility model has the advantages of simple and compact structure, low cost, quick and easy operation, wide application range, good adjustability and high safety.

Description

Fixed Safety Hammer

technical field

The utility model mainly relates to the field of escape equipment, in particular to a safety hammer suitable for closed occasions such as glass windows.

Background technique

The known "safety hammer" is mainly used in enclosed places such as public buses, long-distance buses, and trains, and refers to a tool for escaping by breaking glass, cutting safety belts, etc. in the event of an accident. The traditional safety hammer structure is mainly composed of two parts: a metal hammer head and a plastic hammer handle. The deficiency of this existing structure just is: 1. safety hammer is generally placed on the window corrugated when unused state, is easy to just can be taken off, and this just provides convenience to the not high people of individual quality, Cause the safety hammer to be very easy to lose, and finally affect the normal use when escaping. According to investigations, most of the safety hammers that are equipped on occasions such as buses have disappeared, causing great potential safety hazards. 2. The energy used by the existing safety hammer mainly comes from the human arm, and its destructive power to closures such as windows is limited. Even if the safety hammer is not lost, it will be difficult to break closures such as windows when used. 3. Finally, the existing safety hammer cannot be easily found by the user quickly in a closed environment with poor light such as at night, thereby affecting the success rate of escape.

Utility model content

The technical problem to be solved by the utility model is that: aiming at the technical problems existing in the prior art, the utility model provides a simple and compact structure, low cost, quick and easy operation, wide application range, good adjustability and high safety. Fixed safety hammer.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

A fixed safety hammer, including a hammer head, is characterized in that: the hammer head is connected to the top of an elastic connecting rod, and the bottom of the elastic connecting rod is sleeved in a fixed base through a rotating shaft and can be placed in the fixed base rotate.

As a further improvement of the utility model:

The rotating shaft is provided with more than one hole on the outer wall at one end of the fixed base, and springs and balls are sequentially installed in the holes, and the inner wall of the fixed base is provided with grooves for matching with the balls.

The cross section of one end of the rotating shaft that cooperates with the fixed base is circular, the cross section of the end of the fixed base that cooperates with the rotating shaft is circular, and the grooves are equally spaced and evenly distributed along the circumferential direction of the fixed base.

The hammer head is connected to the top of the elastic connecting rod through a pin.

A fluorescent layer is coated on the hammer head.

Compared with the prior art, the utility model has the advantages of:

1. The fixed safety hammer of the present utility model has the advantages of simple and compact structure, low cost, quick and easy operation, wide application range, good adjustability and safety, and adopts a fixed installation method to prevent it from being moved or stolen;

2. The fixed safety hammer of the present invention adopts the elastic connecting rod design, and the force application method adopts elastic power storage, which is very easy to operate and has strong destructive ability, which greatly improves the safety of the safety hammer;

3. In the fixed safety hammer of the present utility model, the hammer head can be rotated to adjust the force application angle to ensure the accuracy of its use;

4. In the fixed safety hammer of the present invention, the hammer head is provided with a fluorescent layer, which is convenient for the user to find quickly and accurately in the dark, thereby greatly improving the success rate of escape.

Description of drawings

Fig. 1 is the front view structural representation of the utility model;

Fig. 2 is a partial top view structure schematic diagram of the utility model;

Fig. 3 is the structural representation of fixed base in the utility model;

Fig. 4 is the structural representation of connecting rod in the utility model;

Fig. 5 is a structural schematic diagram of the intermediate shaft of the present invention.

illustration:

1. Fixed base; 2. Shaft; 3. Elastic connecting rod; 4. Hammer; 5. Pin; 6. Ball; 7. Spring; 8. Hole; 9. Groove.

Detailed ways

The utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the fixed safety hammer of the present utility model comprises a hammer head 4, and the hammer head 4 is connected to the top of an elastic connecting rod 3, and the elastic connecting rod 3 The bottom is sheathed in a fixed base 1 through a rotating shaft 2 and can rotate in the fixed base 1 . In this embodiment, the fixed base 1 is fixed at the installation point through a connecting piece, and hangs vertically in an unused state, such as being fixed on the window edge between two glass windows by screws to prevent it from being moved or taken away. . The fixed base 1 can be made of ordinary gray cast iron (HT150). The material of the hammer head 4 can be 45# steel, which is prepared through quenching and tempering treatment and surface quenching.

In this embodiment, the hammer head 4 can adopt the secondary impact design according to actual needs. The top of the hammer head is a ball, and there is a stepped surface with an inclined surface at the back of the hammer head, which will have greater destructive power to the glass. The hammer head 4 is coated with a fluorescent layer, which is convenient for the user to find the position of the hammer head 4 quickly and accurately in the dark, and to operate it.

In this embodiment, the elastic connecting rod 3 can be made of light organic composite material PA 6 with very high elastic strength, and its cross section is circular, which can increase the strength of the elastic connecting rod 3. It has two notable features : The first is high flexibility, the second is low cost, easy to popularize and apply. One end of the elastic connecting rod 3 is connected with the rotating shaft 2 through a pin connection, and the other end is fixedly connected with the hammerhead 4 through a pin 5 . At the same time, better elastic material is used between the rotating shaft 2 and the fixed base 1 to buffer the force of the elastic connecting rod 3 on the fixed base 1 .

In this embodiment, the rotating shaft 2 is located on the outer wall of one end of the fixed base 1 and is provided with more than one hole 8. The hole 8 can be cylindrical, and the spring 7 and the ball 6 are sequentially installed in the hole 8. On the inner wall of the fixed base 1 A groove 9 for cooperating with the ball 6 is provided. In this embodiment, there are altogether 24 spherical grooves 9 evenly distributed, that is, there will be a positioning point every time the rotating shaft 2 rotates 15 degrees. The section of one end of the rotating shaft 2 that cooperates with the fixed base 1 is circular, the section of the end of the fixed base 1 that cooperates with the rotating shaft 2 is circular, and the grooves 9 are evenly distributed along the circumferential direction of the fixed base 1 .

Theoretical calculations in actual use:

Known material parameters: Tempered glass parameters: Sample: 920mm×840mm×5mm The compressive strength σbc at the center is about 100Mpa.

Elastic connecting rod 3: Material: High elastic PA nylon rod; Size Φ20mm×600mm Elastic modulus: E=28.3GPa; Poisson’s ratio: μ=0.4;

The mass of hammerhead 4: M=200g.

Using LS-DYNA to simulate stress analysis: when the applied load is 12kg, the obtained data shows that the hammer tip can produce a maximum compressive stress of 103.8Mpa, which is greater than the maximum allowable compressive stress of tempered glass of 100Mpa.

In actual use, first find the position of the hammer head 4, and then adjust the direction of the hammer head 4 after rotating a certain angle through the rotating shaft 2, so that the hammer tip is aligned with the closure; then hold the ball on the top of the hammer head 4 , aim at the closure to be broken (such as a window) and pull it backwards, the elastic connecting rod 3 bends and accumulates full force; when the load force is 12kg, the energy accumulated by the hammer head 4 can break the glass.

The above are only preferred implementations of the utility model, and the scope of protection of the utility model is not limited to the above-mentioned embodiments, and all technical solutions under the thinking of the utility model all belong to the scope of protection of the utility model. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications without departing from the principle of the utility model should be regarded as the protection scope of the utility model.

Claims (5)

1. A fixed safety hammer, comprising a hammer head (4), characterized in that: the hammer head (4) is connected to the top of an elastic connecting rod (3), and the bottom of the elastic connecting rod (3) passes through The rotating shaft (2) is sheathed in a fixed base (1) and can rotate in the fixed base (1). 2. The fixed safety hammer according to claim 1, characterized in that: the shaft (2) is located on the outer wall of one end of the fixed base (1) and has more than one hole (8), and the hole (8) ) are sequentially installed with a spring (7) and a ball (6), and a groove (9) for cooperating with the ball (6) is opened on the inner side wall of the fixed base (1). 3. The fixed safety hammer according to claim 2, characterized in that: the section of one end of the rotating shaft (2) that cooperates with the fixed base (1) is circular, and the fixed base (1) and the rotating shaft (2) ) is a circular cross-section, and the grooves (9) are equally spaced and evenly distributed along the circumferential direction of the fixed base (1). 4. The fixed safety hammer according to claim 1, 2 or 3, characterized in that: the hammer head (4) is connected to the top of the elastic connecting rod (3) through a pin (5). 5. The fixed safety hammer according to claim 1, 2 or 3, characterized in that: the hammer head (4) is coated with a fluorescent layer.

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