Safety hammer for laminated glass

Abstract

The invention discloses a safety hammer for laminated glass, and relates to the field of automobile safety instruments, the safety hammer comprises a grab handle and a hammer head fixed at one end of the grab handle, the front end of the hammer head is provided with a conical tip, one side, facing the grab handle, of the hammer head is provided with an overturning cutting piece, the overturning cutting piece is rotatably connected with the hammer head through a rotating shaft, and a torsional spring is arranged between the overturning cutting piece and the hammer head; and the torsion spring drives the turnover cutting piece to rotate towards the conical tip. A limiting part is arranged on the hammer head or the rotating shaft and used for limiting the unfolding angle of the overturning cutting piece. The overturning cutting piece is provided with a retracting position and an unfolding position, the overturning cutting piece is attached to the hammer head at the retracting position, the torsional spring stores energy, and the overturning cutting piece abuts against the limiting part and is unfolded towards the conical tip at the unfolding position. A cutting edge and / or a hook part are / is arranged on the side, away from the conical tip, of the overturning cutting piece. The elastic overturning cutting piece is automatically unfolded after penetrating through the glass, the glass and the adhesive film can be efficiently pulled, cut and broken when the elastic overturning cutting piece is pulled back, the structure is simplified, machining is easy, operation is convenient and fast, and the automobile emergency escape device is suitable for automobile emergency escape.

Description

Technical Field

[0001] This invention relates to the field of automotive safety equipment, and more specifically to a safety hammer for laminated glass. Background Technology

[0002] With the development of the automotive industry, especially the pursuit of ultimate quietness and safety in new energy vehicles, double-layered laminated glass has been widely used in windshields and side windows due to its excellent sound insulation, heat insulation, and impact resistance. Double-layered laminated glass is typically composed of two layers of tempered glass bonded together with a layer of high-strength polyvinyl butyral (PVB) or ionomer cemented carboxylic acid (SGP) interlayer film.

[0003] However, this composite structure presents new challenges in emergency escape scenarios. Currently, the design principle of mainstream car window breakers (such as impact-type safety hammers) is mainly based on the stress characteristics of ordinary tempered glass: using a sharp hammer head made of hard alloy to generate extremely high local pressure in an instant, causing the stress balance of the tempered glass to be disrupted and the glass to shatter as a whole. However, when such window breakers are used to strike double-layered laminated glass, although they can shatter the inner and outer tempered glass layers, the PVB or SGP film in the middle layer, due to its extremely high toughness and tensile strength, can still effectively adhere the glass fragments on both sides, forming a "flexible mesh barrier" that, although broken, still maintains structural integrity. This barrier cannot detach automatically and is difficult to tear by hand, resulting in the inability to quickly form an opening large enough for passengers to escape, seriously delaying the escape opportunity.

[0004] To address the aforementioned issues, utility model patent CN 223787958 U proposes a safety hammer for double-layered laminated glass. This hammer features a beveled and serrated structure on its head, utilizing the lever principle of the beveled surface to further cut the interlayer film after breaking the glass. However, in this design, the beveled and serrated structure is fixed to the hammer head surface, requiring high processing precision and a certain level of user proficiency, and also presenting significant manufacturing challenges.

[0005] Therefore, how to provide a safety hammer with a simpler structure, more convenient operation, and the ability to efficiently cut the interlayer film of laminated glass has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] The present invention aims to provide a safety hammer that is simple in structure, easy to process, and can automatically unfold the cutting part after penetrating the glass to efficiently cut the interlayer film.

[0007] The technical solution adopted in this invention is as follows: A safety hammer for laminated glass includes a handle and a hammer head. The hammer head is fixed to one end of the handle, and the front end of the hammer head is provided with a conical tip. A flip-cutting component is provided on the side of the hammer head facing the handle. The flip-cutting component is rotatably connected to the hammer head via a rotating shaft, and a torsion spring is provided between the flip-cutting component and the hammer head. The torsion spring is configured to apply an elastic force to the flip-cutting component, causing it to rotate about the rotating shaft toward the conical tip. A limiting part is provided on the hammer head or the rotating shaft to limit the unfolding angle of the flip-cutting component under the action of the torsion spring. The flip-cutting component has a retracted position and an unfolded position: in the retracted position, the flip-cutting component is attached to the hammer head and the torsion spring is in a compressed and energy-storing state; in the unfolded position, the flip-cutting component abuts against the limiting part under the action of the elastic force of the torsion spring and unfolds toward the conical tip; the side of the flip-cutting component away from the conical tip is provided with a cutting edge and / or hook for hooking and pulling to cut and break the glass and the film during pullback.

[0008] Furthermore, the hammer head is provided with a groove for accommodating the flipping cutting component. When the flipping cutting component is attached to the hammer head, the flipping cutting component is received in the groove.

[0009] Furthermore, the limiting part is a step provided on the hammer head, and when the flipping cutting member rotates to a preset angle, the flipping cutting member abuts against the step.

[0010] Furthermore, it also includes a locking member for locking the flip-cutting member in the retracted position, the locking member being detachably disposed on the hammer head and forming a releasable locking engagement with the flip-cutting member.

[0011] Furthermore, the locking element is a pin, the hammer head is provided with a first pin hole, and the flipping cutting element is provided with a second pin hole. When the flipping cutting element is in the retracted position, the first pin hole and the second pin hole are aligned, and the pin is inserted into the first pin hole and the second pin hole to restrict the rotation of the flipping cutting element.

[0012] Furthermore, the handle or the hammer head is provided with a cutting device for cutting seat belts, the cutting device including a guide groove for guiding and locking the seat belt, and a cutting blade is provided on the inner side of the guide groove.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) This utility model uses a rotatable flip-cutting part to replace the fixed inclined surface and saw tooth structure in the prior art, which eliminates the need to process complex inclined surfaces and fine saw teeth on the hammer head, greatly reducing the processing difficulty and manufacturing cost of the parts, and making it easy to mass-produce and promote.

[0015] (2) Through the combined design of the torsion spring and the flip-cutting component, the flip-cutting component can automatically switch from the retracted position to the unfolded position after passing through the glass, relying on the elastic force of the torsion spring. No additional operation or angle adjustment is required by the user, which significantly reduces the operation threshold in emergency situations and improves the escape success rate. The flip-cutting component has a cutting edge and / or hook on the side away from the cone tip, which can effectively hook and cut the middle film left after the double-layer laminated glass is broken when the hammer head is pulled back, quickly forming an escape hole. At the same time, the limiting part (such as the step) can precisely control the unfolding angle of the flip-cutting component, ensuring that it is in the best working posture for each cut.

[0016] (3) By setting a locking component, the flip-cutting component can be locked in the retracted position to prevent accidental pop-out due to vibration or accidental touch when not in use, which ensures both carrying safety and convenient daily storage; a seat belt cutting device is integrated on the handle or hammer head to quickly cut the tangled seat belt; further improving the practicality and operational safety of the safety hammer in various emergency scenarios. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the unfolded state of the flip-cut component in Embodiment 1 of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the flip-cut component in the retracted state in Embodiment 1 of the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of the flipped cutting part in the retracted state in Embodiment 2 of the present invention.

[0020] Figure 4 This is a schematic diagram of the unfolded state of the flip-cut component in Embodiment 2 of the present invention.

[0021] Figure 5 This is a schematic diagram of the structure of the flip-cut component in the retracted state in Embodiment 3 of the present invention.

[0022] Figure 6 This is a schematic diagram of the unfolded state of the flip-cut component in Embodiment 3 of the present invention.

[0023] In the diagram: 1. Handle; 2. Hammer head; 3. Cone tip; 4. Flipping cutting part; 401. Cutting edge; 402. Hook; 5. Shaft; 6. Groove; 7. Cutting device; 8. Step; 9. Pin; 10. First pin hole; 11. Second pin hole. Detailed Implementation

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1

[0026] like Figure 1 and Figure 2 As shown in the figure, this embodiment provides a safety hammer for laminated glass, including a handle 1 and a hammer head 2. The hammer head 2 is fixed to one end of the handle 1, and the front end of the hammer head 2 is provided with a conical tip 3.

[0027] The hammer head 2 has a flip-cutting component 4 on the side facing the handle 1. The flip-cutting component 4 is rotatably connected to the hammer head 2 via a pivot 5, and a torsion spring (not shown in the figure) is provided between the flip-cutting component 4 and the hammer head 2. The torsion spring is configured to apply an elastic force to the flip-cutting component 4, causing it to rotate about the pivot 5 toward the cone tip 3.

[0028] The hammer head 2 is provided with a limiting part to restrict the unfolding angle of the flipping cutting component 4 under the action of the torsion spring. In this embodiment, the limiting part is a step 8 provided on the hammer head 2. When the flipping cutting component 4 rotates to a preset angle, the flipping cutting component 4 abuts against the step 8.

[0029] The flip-cutting component 4 has a retracted position and an unfolded position: in the retracted position (e.g., ... Figure 2 As shown), the flipping cutting component 4 is attached to the hammer head 2 and the torsion spring is in a compressed and energy-storing state; in the unfolded position (e.g. Figure 1 As shown), the flipping cutting piece 4 abuts against the step 8 and unfolds towards the cone tip 3 under the elastic force of the torsion spring.

[0030] The flipping cutter 4 is provided with a cutting edge 401 on the side away from the cone tip 3 for pulling and cutting broken glass and film during pullback.

[0031] The hammer head 2 is provided with a groove 6 for accommodating the flip-cutting component 4. When the flip-cutting component 4 is attached to the hammer head 2, it is housed within the groove 6. The shape of the groove 6 matches the flip-cutting component 4, ensuring that the outer surface is basically flush in the retracted state, reducing resistance when penetrating the glass.

[0032] The handle 1 is provided with a cutting device 7 for cutting seat belts. The cutting device 7 includes a guide groove for guiding and securing the seat belt, and a cutting blade is provided on the inner side of the guide groove.

[0033] Working principle: The user holds the handle 1 and strikes the laminated glass with the cone tip 3, shattering both the inner and outer layers of glass. The user then pushes the front end of the hammer head 2 into the opening. During this process, the flip-cutting component 4 is compressed by the glass, overcoming the torsion spring force and fitting into the groove 6. Once the flip-cutting component 4 has completely passed through the glass, it loses the obstruction of the glass, and the torsion spring drives the flip-cutting component 4 to automatically spring open around the pivot 5 towards the cone tip 3 until it reaches the step 8, reaching the unfolded position. The user then pulls back the handle 1, and the cutting edge 401 on the flip-cutting component 4 hooks and cuts the broken glass and the interlayer film, quickly creating an escape opening. If it is necessary to cut the seatbelt, the cutting device 7 at the end of the handle 1 can be used.

[0034] Example 2

[0035] like Figure 3 and Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that this embodiment further includes a locking member for locking the flipping cutting member 4 in the retracted position. The locking member is detachably disposed on the hammer head 2 and forms a releasable locking engagement with the flipping cutting member 4.

[0036] Specifically, the locking element is a pin 9. The hammer head 2 has a first pin hole 10, and the flipping cutter 4 has a second pin hole 11. When the flipping cutter 4 is in the retracted position, the first pin hole 10 and the second pin hole 11 are aligned, and the pin 9 is inserted into the first pin hole 10 and the second pin hole 11 to restrict the rotation of the flipping cutter 4.

[0037] Furthermore, the structure of the groove 6 in this embodiment is slightly different from that in embodiment 1, and its depth is slightly deeper to avoid the insertion pin 9 and the pin hole structure. In this embodiment, the flipping cutting member 4 is provided with a cutting edge 401 and a hook 402 on the side away from the cone tip 3, which further enhances the cutting and pulling effect.

[0038] The remaining structure is the same as in Example 1, and will not be described again here.

[0039] Example 3

[0040] like Figure 5 and Figure 6 As shown, the difference between this embodiment and Embodiment 1 is that the groove 6 is an open recess (i.e., it does not completely cover the flipping cutting piece 4, but is only a shallow groove with an opening on one side), which facilitates processing and cleaning. In this embodiment, the flipping cutting piece 4 is provided with a hook 402 and a cutting edge 401 on the side away from the cone tip 3.

[0041] The remaining structure is the same as in Example 1, and will not be described again here.

[0042] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the inventive concept of the present invention, and all such modifications or additions should fall within the protection scope of the present invention.

Claims

1. A safety hammer for laminated glass, comprising a handle (1) and a hammer head (2), wherein the hammer head (2) is fixed to one end of the handle (1), and the front end of the hammer head (2) is provided with a conical tip (3), characterized in that: The hammer head (2) is provided with a flip-cutting component (4) on the side facing the handle (1). The flip-cutting component (4) is rotatably connected to the hammer head (2) via a rotating shaft (5). A torsion spring is provided between the flip-cutting component (4) and the hammer head (2). The torsion spring is configured to apply an elastic force to the flip-cutting component (4) to make it rotate about the rotating shaft (5) in the direction toward the cone tip (3). The hammer (2) or the rotating shaft (5) is provided with a limiting part to limit the unfolding angle of the flipping cutting piece (4) under the action of the torsion spring; The flip-cutting component (4) has a retracted position and an extended position: in the retracted position, the flip-cutting component (4) is attached to the hammer head (2) and the torsion spring is in a compressed and energy-storing state; in the extended position, the flip-cutting component (4) abuts against the limiting part under the elastic force of the torsion spring and extends toward the cone tip (3). The flip-cutting component (4) is provided with a cutting edge (401) and / or hook (402) on the side away from the cone tip (3) for hooking and pulling the broken glass and film during pullback.

2. A safety hammer for laminated glass according to claim 1, characterized in that: The hammer head (2) is provided with a groove (6) for accommodating the flip-cutting piece (4). When the flip-cutting piece (4) is attached to the hammer head (2), the flip-cutting piece (4) is contained in the groove (6).

3. A safety hammer for laminated glass according to claim 1, characterized in that: The limiting part is a step (8) provided on the hammer head (2). When the flipping cutting part (4) rotates to a preset angle, the flipping cutting part (4) abuts against the step (8).

4. A safety hammer for laminated glass according to claim 1, characterized in that: It also includes a locking member for locking the flip-cutting member (4) in the retracted position, the locking member being detachably disposed on the hammer head (2) and forming a releasable locking engagement with the flip-cutting member (4).

5. A safety hammer for laminated glass according to claim 4, characterized in that: The locking element is a pin (9), the hammer (2) is provided with a first pin hole (10), and the flipping cutter (4) is provided with a second pin hole (11). When the flipping cutter (4) is in the retracted position, the first pin hole (10) and the second pin hole (11) are aligned, and the pin (9) is inserted into the first pin hole (10) and the second pin hole (11) to restrict the rotation of the flipping cutter (4).

6. A safety hammer for laminated glass according to any one of claims 1-5, characterized in that: The handle (1) or the hammer (2) is provided with a cutting device (7) for cutting seat belts. The cutting device (7) includes a guide groove for guiding and clamping the seat belts, and a cutting blade is provided on the inner side of the guide groove.

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