CN113856073A - Vehicle-mounted water-falling induction type automatic safety hammer - Google Patents
Vehicle-mounted water-falling induction type automatic safety hammer Download PDFInfo
- Publication number
- CN113856073A CN113856073A CN202111257316.5A CN202111257316A CN113856073A CN 113856073 A CN113856073 A CN 113856073A CN 202111257316 A CN202111257316 A CN 202111257316A CN 113856073 A CN113856073 A CN 113856073A
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- Prior art keywords
- safety hammer
- vehicle
- shell
- gear
- battery
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000006698 induction Effects 0.000 title claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 44
- 239000011521 glass Substances 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 28
- 206010013647 Drowning Diseases 0.000 claims description 20
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 3
- 239000002390 adhesive tape Substances 0.000 claims description 3
- 229910001416 lithium ion Inorganic materials 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000010009 beating Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 20
- 238000010586 diagram Methods 0.000 description 9
- 239000003990 capacitor Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 241000976416 Isatis tinctoria subsp. canescens Species 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001795 light effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B3/00—Devices or single parts for facilitating escape from buildings or the like, e.g. protection shields, protection screens; Portable devices for preventing smoke penetrating into distinct parts of buildings
- A62B3/005—Rescue tools with forcing action
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Mechanical Engineering (AREA)
- Emergency Lowering Means (AREA)
Abstract
The invention discloses a vehicle-mounted water falling induction type automatic safety hammer, which comprises: the device comprises a shell, and a motor, a transmission device, a spring safety hammer, a circuit board, a battery and a liquid induction head which are arranged in the shell; one end of the transmission device is connected with the motor, and the other end of the transmission device is connected with the spring safety hammer; the shell is provided with a through hole corresponding to the striking part of the spring safety hammer; the circuit board is respectively connected with the motor, the battery and the liquid induction head; the battery is respectively connected with the motor and the liquid induction head in a power supply mode. The automobile safety hammer has usability, and after a vehicle falls into water, the liquid induction head detects liquid, the safety hammer is automatically started to break glass, and the escape opportunity and the escape time of people in the automobile are increased.
Description
Technical Field
The invention belongs to the field of automobile lifesaving products, and relates to a vehicle-mounted drowning induction type automatic safety hammer.
Background
Along with the development of society and the progress of science and technology, the material culture living standard of people is greatly improved, automobiles are increasingly popularized to various families as common transportation means in life, and the safety protection of the automobiles also becomes a topic which is increasingly concerned by people.
In recent years, due to serious urban waterlogging in rainy days, news that many vehicles are flushed into flood or the vehicles are flooded and people in the vehicles cannot escape has been generated. The automobile is heavy after falling into water, so the automobile can sink into water in a short time after falling into water, meanwhile, the water pressure when the automobile is submerged is too high, the automobile door is generally difficult to open immediately, personnel in the automobile can not escape from the automobile in a short time, and the automobile door can not be opened, so the tragic of automobile death can be caused.
Generally, to solve this problem, drivers place a safety hammer in the vehicle to break the window for escaping when the vehicle is submerged. But the safety hammer is not always placed in a place where the driver can touch, and the driver needs to search for the safety hammer in case of an accident. The existing manual safety hammer is characterized in that after an automobile falls into water, due to scare of people, the safety hammer cannot be found in time or cannot be found, so that self-rescue opportunities are lost, and serious irretrievable loss is caused.
Disclosure of Invention
In view of the problems in the prior art, an object of the present invention is to provide a vehicle-mounted drowning sensing type automatic safety hammer, which at least partially solves the above technical problems.
The embodiment of the invention provides a vehicle-mounted water falling induction type automatic safety hammer, which comprises: the device comprises a shell, and a motor, a transmission device, a spring safety hammer, a circuit board, a battery and a liquid induction head which are arranged in the shell;
one end of the transmission device is connected with the motor, and the other end of the transmission device is connected with the spring safety hammer; the shell is provided with a through hole corresponding to the striking part of the spring safety hammer;
the circuit board is respectively connected with the motor, the battery and the liquid induction head; the battery is respectively connected with the motor and the liquid induction head in a power supply mode.
Further, the spring safety hammer comprises a spring and a glass striking rod; one end of the spring is mounted at the tail part of the glass striking rod, and the other end of the spring is abutted against the inner wall of the shell; the peripheral surface of the glass striking rod is provided with a rack; the glass striking rod is meshed with the transmission device through a rack.
Further, the transmission device comprises an output gear, a first transmission gear, a second transmission gear, a third transmission gear and a change gear;
the output gear, the first transmission gear, the second transmission gear, the third transmission gear and the change gear are meshed in sequence; the output gear is in driving connection with the motor;
the direction changing gear consists of a zero-degree bevel gear and an incomplete gear; wherein the incomplete gear is engaged with the rack of the glass striking rod.
Furthermore, an LED lamp is arranged on the shell; the LED lamp is connected with the circuit board.
Further, still include: a photoresistor; the photoresistor is connected with the circuit board, corresponds to the through hole in the shell and is used for detecting the brightness of an external environment.
Furthermore, a double-sided adhesive tape is arranged on the surface of the shell corresponding to the beating part and used for adhering the shell.
Further, a solar panel is mounted on the shell; the solar panel is connected with the battery.
Further, the battery is a 18650 lithium ion battery.
Compared with the prior art, the vehicle-mounted water falling induction type automatic safety hammer provided by the embodiment of the invention has usability, and after a vehicle falls into water, the liquid induction head detects liquid, the safety hammer automatically starts to break glass, so that the escape chance of people in the vehicle is increased. The invention also comprises an LED lamp and a photoresistor, when the light is too dark, the circuit board is detected through the liquid induction head and the photoresistor, so that the signal lamp is bright. After the black day, the photoresistor conducts electricity, so that the signal lamp is on to play a role of a warning lamp, and after the white day, the photoresistor does not conduct electricity, and the signal lamp is turned off.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
Fig. 1 is a schematic plan view of a vehicle-mounted drowning sensing type automatic safety hammer according to an embodiment of the present invention;
fig. 2 is a sectional view of a three-dimensional structure of a vehicle-mounted water-falling induction type automatic safety hammer according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a spring safety hammer according to an embodiment of the present invention;
FIG. 4 is a front view of a transmission configuration provided by an embodiment of the present invention;
FIG. 5 is a top view of a transmission configuration provided in accordance with an embodiment of the present invention;
fig. 6 is a schematic view of a liquid inlet of the vehicle-mounted drowning sensing type automatic safety hammer according to the embodiment of the invention;
fig. 7 is a side view of an external structure of a vehicle-mounted drowning sensing type automatic safety hammer according to an embodiment of the present invention;
fig. 8 is a schematic external structural view of a vehicle-mounted drowning sensing type automatic safety hammer for installation in a vehicle according to an embodiment of the present invention;
fig. 9 is a longitudinal cross-sectional view of a vehicle-mounted drowning sensing type automatic safety hammer for in-vehicle installation according to an embodiment of the present invention;
fig. 10 is a schematic external structural view of a vehicle-mounted drowning sensing type automatic safety hammer for vehicle exterior installation according to an embodiment of the invention;
fig. 11 is a transverse cross-sectional view of a vehicle-mounted drowning sensing type automatic safety hammer for vehicle exterior installation according to an embodiment of the invention;
FIG. 12 is a schematic diagram of a battery circuit according to an embodiment of the present invention;
fig. 13 is a schematic circuit diagram of a battery charging module according to an embodiment of the invention;
fig. 14 is a schematic circuit diagram of a battery discharging module according to an embodiment of the present invention;
FIG. 15 is a schematic diagram of a circuit connection of a central control chip according to an embodiment of the present invention;
fig. 16 is a schematic diagram of the circuit connection between the LED and the motor according to the embodiment of the present invention.
In the drawing, a shell 1, a motor 2, a transmission device 3, a spring safety hammer 4, a circuit board 5, a photoresistor 51, a battery 6, a liquid induction head 7, an LED lamp 8, a solar panel 9, an electric quantity display lamp 10, an output gear 31, a first transmission gear 32, a second transmission gear 33, a third transmission gear 34, a change gear 35, a spring 41, a glass striking rod 42 and a striking rod hole 43 are arranged.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "inscribed," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
The vehicle-mounted drowning sensing type automatic safety hammer provided by the embodiment of the invention is arranged on glass inside or outside a vehicle, preferably on front windshield outside the vehicle, as shown in fig. 1 and 2, and comprises: the device comprises a shell 1, a motor 2, a transmission device 3, a spring safety hammer 4, a circuit board 5, a battery 6 and a liquid induction head 7 which are arranged in the shell 1;
one end of the transmission device 3 is connected with the motor 2, and the other end is connected with the spring safety hammer 4; the shell 1 is provided with a through hole corresponding to the striking part of the spring safety hammer 4;
the circuit board 5 is respectively connected with the motor 2, the battery 6 and the liquid induction head 7; the battery 6 is respectively connected with the motor 2 and the liquid induction head 7 in a power supply mode. The size of the shell 1 is 120mm multiplied by 44.2mm, and the volume is small.
The invention has practicability, and after the vehicle falls into water, the liquid induction head 7 detects liquid, the safety hammer is automatically started to break glass, and the escape chance of people in the vehicle is increased.
In one embodiment, as shown in fig. 3, the spring safety hammer 4 includes a spring 41 and a glass striking rod 42; one end of the spring 41 is arranged at the tail part of the glass striking rod 42, and the other end is abutted against the inner wall of the shell 1; the peripheral surface of the glass striking rod 42 is provided with a rack; the glass striking rod 42 is engaged with the transmission 3 through a rack. The spring 41 is compressed and restored by the rotation of the direction changing gear 35, and pushes the glass striking rod 42 to strike the glass.
In one embodiment, as shown in fig. 4 and 5, the transmission device 3 includes an output gear 31, a first transmission gear 32, a second transmission gear 33, a third transmission gear 34, and a direction changing gear 35; the output gear 31, the first transmission gear 32, the second transmission gear 33, the third transmission gear 34 and the change gear 35 are sequentially meshed; the output gear 31 is in driving connection with the motor 2; as shown in fig. 3, the direction change gear 35 is constituted by a zero-degree bevel gear and an incomplete gear; wherein the partial gear is engaged with the rack of the glass striking rod 42.
In order to prevent the motor 2 from short circuit due to water inflow, as shown in fig. 6, the case is welded by ultrasonic waves, the motor 2 and the battery 6 are sealed by using a gasket, and a sealing rubber gasket is installed between the direction changing gear 35 and the side surface of the glass striking rod 42 to prevent the battery 6, the circuit board 5 and the motor 2 from water intrusion. Meanwhile, as the liquid induction head 7 is arranged in the shell, as shown in fig. 7, the shell 1 is provided with the liquid inlet, and the three liquid inlets are sequentially lowered, so that the liquid can flow out conveniently.
In one embodiment, the face of the housing 1 corresponding to the striking portion is provided with a double-sided adhesive tape for adhering the housing 1.
In one embodiment, as shown in fig. 8 and 10, the housing 1 has a solar panel 9 mounted thereon; the solar panel 9 is connected with the battery 6 and supplies power to the battery 6. Utilize 5V solar panel to charge for battery 6, guarantee that the safety hammer is in the electrified state. As shown in fig. 12, the battery 6 is a lithium ion battery BT1, model 18650, low cost, and the housing 1 has a power display lamp 10. Wherein B + represents the positive pole of the battery, B-represents the negative pole of the battery, B + signal is connected with B + signal in the circuit diagram.
When the safety hammer is installed in a vehicle, as shown in fig. 8 and 9, the solar panel 9, the LED lamp 8, the light dependent resistor 51 of the electric quantity display lamp 10 and the striking rod hole 51 corresponding to the glass striking rod are located on the same plane; when the safety hammer is installed outside a vehicle, as shown in fig. 10 and 11, the solar panel 9, the LED lamp 8, the charge level indicator lamp 10, and the photo resistor 51 are located on the same plane facing the outside of the vehicle, and the striking rod hole 51 is located on the back surface of the housing 1 and is closely attached to the glass.
In an embodiment, the invention provides a vehicle-mounted drowning sensing type automatic safety hammer, further comprising: an LED lamp 8; the LED lamp 8 is connected to the circuit board 5.
In an embodiment, the invention provides a vehicle-mounted drowning sensing type automatic safety hammer, as shown in fig. 11, further including: a photo-resistor 51; the photo resistor 51 is connected to the circuit board 5 and corresponds to a through hole on the housing for detecting the brightness of the external environment.
When the automatic safety hammer detects that the light is dim when the automobile falls into water, the MCU controls the LED lamp 8 to be turned on. Under the dim environment promptly, the photo resistance is electrically conductive, makes 8 liang of LED lamp, plays the warning light effect, gets into after the day, and the photo resistance nonconducting, the signal lamp is closed. The LED lamp 8 lights in the dark, can play warning effects such as giving the passing vehicle, and after the vehicle wades, the LED lamp lights and can play search and rescue effect. According to the vehicle-mounted water falling induction type automatic safety hammer provided by the embodiment of the invention, after glass is broken, the vehicle is separated from the vehicle, and due to the impact of water flow rushing into the vehicle, the safety hammer falls into the vehicle after the glass is broken under most conditions. When the safety hammer is arranged on the upper part of the front windshield of the vehicle, after the broken glass is separated, the safety hammer has a falling process under the action of gravity, and the situation that the safety hammer falls out of the vehicle can be reduced.
The vehicle-mounted water falling induction type automatic safety hammer provided by the embodiment of the invention has certain usability, and can be automatically started to hammer glass after a vehicle falls into water, so that the escape chance of people in the vehicle is increased, and after the LED is started, if the vehicle falls into water at night, search and rescue personnel can quickly find the position falling into water to save trapped people. The invention has simple installation, small occupied space and certain economic value.
As shown in fig. 12-16, the circuit board 5 is integrated with a charging module, a discharging module, a central control chip MCU, a capacitor C2 and a battery BT1, and the battery is charged by a solar panel. As shown in fig. 13, the charging module includes a chip U1, a diode D1, a capacitor C1, resistors R1 and R2, and two parallel light emitting diodes as the power display lamp 10, and the model of the chip U1 is 4056. A pin 1 TEMP and a pin 3 GND of the chip U1 are grounded, a pin 2 PROG is connected in series with a resistor R1 and then grounded, and a pin 4 and a pin 8 are connected with a power transmission line in parallel; the power transmission line is connected with the solar panel 9, a diode D1 is installed on the power transmission line, and the model of the D1 is SS 14. The anode of the diode D1 is connected with the solar panel 9, the cathode is respectively connected with the capacitor C1 and the resistor R2, and the capacitor C1 is grounded. One end of two parallel light-emitting diodes in the electric quantity display lamp 10 is respectively connected with a 7-pin CHRG and a 6-pin STDBY of a chip U1, the other end of the two parallel light-emitting diodes is connected with a resistor R2, a diode connected with the 7 pin emits red light to indicate a charging state, and a diode connected with the 6 pin emits green light to indicate a full-charging state. The 5 pin of the chip U1 is connected to the positive electrode of the battery 6 for charge control.
As shown in fig. 14, the discharge module is used for short circuit/overcharge discharge protection, and includes: the chip U2, electric capacity C4, resistance R3, the model of U2 chip is 5353. The battery 6 is connected with a pin 3 VDD of a chip U2 series connection R3, a pin 2 is connected with a cathode and an anode of the battery 6, a capacitor C4 is connected between the pin 3 and the pin 2 in parallel, and a pin 4 VM and a pin 5 VM are connected with the ground in parallel.
As shown in fig. 15 and 16, the central control chip MCU is labeled as U3, pin 1 VDD of U3 is connected to the battery 6, parallel capacitors C2 and C8 pins of U3 are grounded, pin 2 series resistor R4 is grounded, and pin 4 and pin 5 are connected to the liquid sensor head 7 and pin 7 of LS1 in parallel and are connected to the motor 2. The motor 2 is represented by a direct current motor M1 in a circuit diagram, two ends of the direct current motor are respectively connected with a capacitor C3 and a diode D2 in parallel, one end of the parallel circuit is connected with the battery 6, the other end of the parallel circuit is connected with a C pin of a PNP type triode Q2, a pin E of the triode Q2 is grounded, and a pin B is connected with a pin 7 of the MCU after being connected with a resistor R6 in series.
One end of the LED lamp 8 is connected with a pin 6 of the MCU, a connecting wire of the LED lamp comprises a resistor R6 and an NPN type triode Q1, the model of Q1 is SS8050, one end of the resistor R6 is connected with the pin 6 to be connected with a pin B of the NPN type triode, a pin C is connected with the battery 6, and a pin E is grounded. The other end of the LED lamp 8 is connected with a B + signal of the battery 6, and a resistor R7 is connected in series on the connecting wire. When the liquid detection head 7 detects liquid, the LED lamp 8 is turned on to warn. The photoresistor 51 is marked as RL in the circuit diagram, and has one end connected to the pin 2 of the central control chip MCU in parallel with the resistor R4 and the other end connected to the battery 6.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the equivalent replacement or change according to the technical solution and the modified concept of the present invention should be covered by the scope of the present invention.
Claims (8)
1. The utility model provides an automatic safe hammer of on-vehicle drowning induction type which characterized in that includes: the device comprises a shell (1), a motor (2), a transmission device (3), a spring safety hammer (4), a circuit board (5), a battery (6) and a liquid induction head (7) which are arranged in the shell (1);
one end of the transmission device (3) is connected with the motor (2), and the other end of the transmission device is connected with the spring safety hammer (4); the shell (1) is provided with a through hole corresponding to the striking part of the spring safety hammer (4);
the circuit board (5) is respectively connected with the motor (2), the battery (6) and the liquid induction head (7); the battery (6) is respectively connected with the motor (2) and the liquid induction head (7) in a power supply mode.
2. The vehicle-mounted drowning sensing type automatic safety hammer according to claim 1, characterized in that: the spring safety hammer (4) comprises a spring (41) and a glass striking rod (42); one end of the spring (41) is mounted at the tail part of the glass striking rod (42), and the other end of the spring is abutted against the inner wall of the shell (1); the peripheral surface of the glass striking rod (42) is provided with a rack; the glass striking rod (42) is meshed with the transmission device (3) through a rack.
3. The vehicle-mounted drowning sensing type automatic safety hammer according to claim 2, characterized in that: the transmission device (3) comprises an output gear (31), a first transmission gear (32), a second transmission gear (33), a third transmission gear (34) and a change gear (35);
the output gear (31), the first transmission gear (32), the second transmission gear (33), the third transmission gear (34) and the change gear (35) are meshed in sequence; the output gear (31) is in driving connection with the motor (2);
the direction changing gear (35) is composed of a zero-degree bevel gear and an incomplete gear; wherein the partial gear is engaged with a rack of the glass striking rod (42).
4. The vehicle-mounted drowning sensing type automatic safety hammer according to claim 1, characterized in that: the shell (1) is also provided with an LED lamp (8); the LED lamp (8) is connected with the circuit board (5).
5. The vehicle-mounted drowning sensing automatic safety hammer according to claim 4, characterized in that: further comprising: a photoresistor; the photoresistor is connected with the circuit board (5), corresponds to the through hole in the shell (1), and is used for detecting the brightness of an external environment.
6. The vehicle-mounted drowning sensing type automatic safety hammer according to claim 1, characterized in that: and a double-sided adhesive tape is arranged on the surface of the shell (1) corresponding to the beating part and used for adhering the shell (1).
7. The vehicle-mounted drowning sensing type automatic safety hammer according to claim 1, characterized in that: a solar panel (9) is arranged on the shell (1); the solar panel (9) is connected with the battery (6).
8. The vehicle-mounted drowning sensing type automatic safety hammer according to claim 1, characterized in that: the battery (6) is a 18650 lithium ion battery.
Priority Applications (1)
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CN202111257316.5A CN113856073A (en) | 2021-10-27 | 2021-10-27 | Vehicle-mounted water-falling induction type automatic safety hammer |
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CN202111257316.5A CN113856073A (en) | 2021-10-27 | 2021-10-27 | Vehicle-mounted water-falling induction type automatic safety hammer |
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Application publication date: 20211231 |