Municipal vehicle warning device

Abstract

The invention discloses a municipal vehicle warning device which comprises a base, a machine box is arranged on the base, a warning mechanism is arranged on the machine box, fixing supporting legs are fixedly welded to the corners of the lower end of the base, roller supporting legs are arranged at the corners of the lower end face of the base, and limiting assemblies are arranged on the two sides of the base. Each roller supporting leg comprises a first motor and a roller assembly, the first motor is connected with the roller assembly through a gear transmission box, the limiting assembly comprises an electric cylinder, one end of a push rod of the electric cylinder is connected with a negative pressure pump assembly, and the negative pressure pump assembly is connected with a suction cup. The warning device is technically characterized in that the display screen assembly, the reflective strip, the flashing light assembly, the audible and visual alarm, the loudspeaker assembly and the radar are integrated, the warning effect of the warning device is improved, the fixed supporting feet and the rolling wheel supporting feet are flexibly switched through the first motor, the warning device is limited through the limiting assembly, and the road holding force of the warning device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle warnings, and in particular to a municipal vehicle warning device. Background Art

[0002] Municipal vehicle warning refers to a traffic sign system with specific warning functions set up by municipal management departments to ensure road safety and maintain traffic order. These signs use visual signals to remind road users of potential risks or special road conditions, thereby reducing the incidence of traffic accidents. The main functions include warning, indication and prohibition, reminding drivers and pedestrians that there are dangerous areas or special road conditions ahead, and they need to drive carefully or take preventive measures, guiding road users to drive in the correct direction or comply with traffic rules, such as speed limits, no passage, etc., and clearly prohibiting or restricting the traffic behavior of vehicles and pedestrians, such as no left turn, no right turn, etc.

[0003] With the development of society, many cities are carrying out a large amount of municipal engineering infrastructure construction, such as road maintenance and construction, water conservancy pipeline laying, power engineering construction, etc. Most of the construction projects are located in the city, so it is necessary to warn pedestrians and vehicles near the construction site to improve the safety of the operation.

[0004] Existing warning methods are mostly to build traffic warning signs on site, relying on single graphic symbols and text to convey specific information, so as to manage traffic and indicate driving directions. If it is at night or in a poorly lit environment, it is difficult to see the warning signs clearly. If it is windy, it is easy to blow down the warning device or blow the warning device away from the designated position. Under severe weather conditions, its warning effect will be greatly reduced. Summary of the invention

[0005] Technical issues solved: In view of the shortcomings of the prior art, the present invention provides a municipal vehicle warning device, which integrates a display screen assembly, a reflective strip, a flashing light assembly, an sound and light alarm, a speaker assembly and a radar, thereby improving the warning effect of the warning device. The fixed support leg and the roller support leg are flexibly switched by a first motor, and the warning device is limited by a limiting assembly, thereby improving the grip of the warning device and solving the technical problems mentioned in the background technology.

[0006] Technical solution: To achieve the above object, the present invention is implemented through the following technical solutions: A municipal vehicle warning device comprises a base, a chassis is arranged on the base, a warning mechanism is arranged on the chassis, fixed feet are welded and fixed at the corners of the lower end of the base, roller feet are arranged at the corners of the lower end surface of the base, and limiting components are arranged on both sides of the base, the roller feet comprise a first motor and a roller assembly, the first motor and the roller assembly are connected through a gear transmission box, the limiting component comprises an electric cylinder, one end of the electric cylinder push rod is connected to a negative pressure pump assembly, the negative pressure pump assembly is connected to a suction cup, an air pipe is arranged between the negative pressure pump assembly and the suction cup, the electric cylinder drives the negative pressure pump assembly and the suction cup at one end thereof to move downward, the end suction cup contacts the ground, and at the same time, the negative pressure pump assembly works to pump air through the air pipe, and under the action of the external atmospheric pressure, the suction cup is tightly adsorbed on the ground, The grip of the warning device is improved to improve the placement stability of the warning device. The warning mechanism includes a display screen assembly, which can display text and images. A reflective strip is provided on the outer frame of the display screen assembly. The reflective strip increases the visibility of objects by reflecting light and can reflect surrounding light at night. A strobe light assembly is provided on the top of the display screen assembly. The strobe light assembly reminds the driver of road hazards through strobe or strong light. The flashing frequency and brightness of the strobe light can be adjusted accordingly according to usage requirements. Sound and light alarms and speaker assemblies are provided on both sides of the display screen assembly. The speaker assembly can perform voice broadcasts. The warning device integrates the display screen assembly, the reflective strip, the strobe light assembly, the sound and light alarm, the speaker assembly and the radar, thereby improving the warning effect of the warning device.

[0007] In a possible implementation, the output shaft of the first motor is fixedly connected to the driving gear, the roller assembly is fixedly connected to the driven gear, and the driven gear is meshed with the driving gear. The driven gear and the driving gear are both located inside the gear transmission box. The roller assembly is driven by the first motor to rotate and switch the working state of the roller assembly.

[0008] In one possible implementation, a mounting lug is welded and fixed on the gear transmission box, and a slot is provided on the mounting lug. The roller support foot is fixedly connected to the base by screws. The gear transmission box is mounted and fixed on the inner side of the base by screws through the mounting lug, thereby achieving installation and fixation of the roller support foot.

[0009] In a possible implementation, the limiting component is located between the two groups of roller feet, and the warning device is limited by the limiting component to improve the grip of the warning device, thereby improving the placement stability of the warning device.

[0010] In a possible implementation, radars are installed at the corners of the upper end surface of the base. The radars are used in conjunction with an audible and visual alarm. When the radar detects an intrusion, it can trigger a high-decibel alarm and strobe light of the audible and visual alarm.

[0011] In a possible implementation, the warning mechanism includes a vertical plate and a drive frame, and the vertical plates are provided with two groups, and a second motor is installed on one group of the vertical plates. Connecting shafts are welded and fixed on both sides of the drive frame, and the connecting shafts are connected to the vertical plates by bearings. The output shaft of the second motor is fixedly connected to the connecting shaft by a coupling, and the working state of the warning mechanism is adjusted by the second motor. When the warning device is not in use, the warning mechanism of the warning device is in a flat state. Folding and laying the warning mechanism flat facilitates the transportation and storage of the warning device.

[0012] In a possible implementation, the reflective strip is adhered and fixed to the outer frame of the display screen assembly, and the reflective strip is adhered and fixed to both the front end surface and the rear end surface of the outer frame of the display screen assembly to perform full reflection.

[0013] In one possible implementation, the chassis has a built-in battery module, which is rechargeable and can store electricity. The battery module can be charged and discharged multiple times through external charging and can be used with an external power supply. When the warning device cannot be connected to an external power supply, the warning device can be powered by the battery module.

[0014] In a possible implementation, the driving frame includes a main frame body and an adjusting frame, the main frame body is provided with a groove inside, one end of the adjusting frame is fixedly connected to the display screen assembly, and the other end of the adjusting frame extends into the groove of the main frame body.

[0015] In a possible implementation, the main frame and the adjustment frame are fixedly connected by a tightening screw. When the tightening screw is loosened, the adjustment frame can slide along the groove of the main frame. At this time, the extension length of the adjustment frame can be adjusted. By changing the extension length of the adjustment frame, the height position of the warning mechanism can be adjusted.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention integrates a display screen assembly, a reflective strip, a strobe light assembly, an acousto-optic alarm, a speaker assembly and a radar. The display screen assembly can select corresponding text and images for display according to actual use requirements, the speaker assembly can perform voice broadcasting, the reflective strip can reflect light, the strobe light assembly can remind the driver of road hazards through strobe or strong light, and when the radar detects an intrusion object, it can trigger the high-decibel alarm sound and strobe light of the acousto-optic alarm, thereby improving the warning effect of the warning device.

[0017] 2. The present invention flexibly switches between the fixed legs and the roller legs through the first motor. When the warning device is in a normal placement state, the four groups of fixed legs at the lower corners of the base are in contact with the ground. When the warning device needs to be moved, the roller assembly is driven by the first motor to rotate a certain angle to contact the ground, and lift up the fixed legs, and the warning device is quickly moved by the roller assembly of the four groups of roller legs.

[0018] 3. When the present invention works under adverse weather conditions, the warning device is limited by a limiting component to improve the grip of the warning device, thereby improving the placement stability of the warning device. In windy weather, the limiting component can prevent the warning device from tipping over or moving away from the working area, so that the warning device can perform warning operations under adverse weather conditions.

[0019] 4. When not in use, the warning mechanism of the present invention is in a flat state. Folding the warning mechanism and laying it flat facilitates the transportation and storage of the warning device. The height position of the warning mechanism is flexibly adjustable, which improves the flexibility of the warning device during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0021] Figure 1 It is a folding schematic diagram of the warning mechanism of the present invention; Figure 2 It is a working schematic diagram of the warning mechanism of the present invention; Figure 3 It is a working schematic diagram of the roller support foot of the present invention; Figure 4 It is a schematic diagram of the top view structure of the base of the present invention; Figure 5 It is a schematic diagram of the structure of the base of the present invention when viewed from the bottom; Figure 6 It is a schematic structural diagram of the roller support foot of the present invention; Figure 7 It is a transmission schematic diagram of the first motor and the roller assembly of the present invention; Figure 8 It is a structural schematic diagram of the limit assembly of the present invention; Fig. 9 It is a structural schematic diagram of the warning mechanism of the present invention; Fig.10 It is a structural schematic diagram of the drive frame of the present invention.

[0022] In the figure: 1. base; 2. chassis; 3. warning mechanism; 4. radar; 11. fixed support foot; 12. roller support foot; 13. limit assembly; 121. first motor; 122. roller assembly; 123. gear transmission box; 124. driving gear; 125. driven gear; 126. mounting lug; 131. electric cylinder; 132. negative pressure pump assembly; 133. suction cup; 134. air pipe; 31. display assembly; 32. reflective strip; 33. flashing light assembly; 34. sound and light alarm; 35. speaker assembly; 36. vertical plate; 37. drive frame; 38. second motor; 39. connecting shaft; 371. main frame; 372. adjustment frame; 373. tightening screw. DETAILED DESCRIPTION

[0023] The embodiment of the present application provides a municipal vehicle warning device that integrates a display screen assembly, a reflective strip, a flashing light assembly, an audible and visual alarm, a speaker assembly, and a radar, thereby improving the warning effect of the warning device. The fixed support leg and the roller support leg are flexibly switched by a first motor, and the warning device is limited by a limiting assembly to improve the grip of the warning device, thereby solving the technical problems mentioned in the background technology.

[0024] The technical solution in the embodiment of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows: Embodiment 1: See also Figure 1-10 The present invention provides a technical solution: a municipal vehicle warning device, comprising a base 1, a chassis 2 is arranged on the base 1, a warning mechanism 3 is arranged on the chassis 2, fixed legs 11 are welded and fixed at the corners of the lower end of the base 1, roller legs 12 are arranged at the corners of the lower end surface of the base 1, and limited position components 13 are arranged on both sides of the base 1. The roller legs 12 include a first motor 121 and a roller assembly 122. The first motor 121 and the roller assembly 122 are connected through a gear transmission box 123. Next, the limit assembly 13 includes an electric cylinder 131, one end of the push rod of the electric cylinder 131 is connected to the negative pressure pump assembly 132, the negative pressure pump assembly 132 is connected to the suction cup 133, and an air pipe 134 is arranged between the negative pressure pump assembly 132 and the suction cup 133. The warning mechanism 3 includes a display screen assembly 31, a reflective strip 32 is arranged on the outer frame of the display screen assembly 31, a flashing light assembly 33 is arranged on the top of the display screen assembly 31, and sound and light alarms 34 and speaker assemblies 35 are arranged on both sides of the display screen assembly 31.

[0025] The warning device is placed in a designated area for use to warn vehicles. When the warning device is in a normal placement state, the four sets of fixed legs 11 at the lower corners of the base 1 are in contact with the ground, so that the warning device is stable and will not be easily displaced by external forces, thereby improving the stability during the warning operation. When the four sets of fixed legs 11 are in contact with the ground, the four sets of roller legs 12 are folded on the inner side of the base 1, and the roller legs 12 do not bear weight at this time.

[0026] When the warning device needs to be moved, the first motor 121 is driven by the gear box 123 to drive the roller assembly 122 to rotate. The roller assembly 122 rotates a certain angle in a specified direction and contacts the ground during the rotation. At the same time, the four sets of fixed legs 11 are lifted up to realize the switching of the legs. Figure 3 As shown, when the roller assembly 122 is driven by the first motor 121 to rotate a certain angle and contact the ground, the roller assembly 122 at this time bears weight and is used as a mobile support leg, while the four groups of fixed legs 11 are lifted off the ground, and the fixed legs 11 do not bear weight. The warning device can be quickly moved by the roller assembly 122 of the four groups of roller legs 12 to move the warning device to a designated position, thereby realizing rapid adjustment of the working position of the warning device and facilitating the transportation of the warning device.

[0027] The display screen component 31 can display text and images, and the speaker component 35 can broadcast voice. The text display and voice broadcast can be performed simultaneously. The display screen component 31 can import text information and image information through a U disk, and can select corresponding text and images for display according to actual usage needs, thereby playing the role of real-time road condition information prompts, early warnings, etc., and improving the warning effect.

[0028] The flashing light assembly 33 includes multiple modules, each module includes a number of LED lamp beads, the flashing frequency and brightness of which can be adjusted to remind the driver of road hazards through flashing or strong light. The flashing frequency and brightness of the flashing light can be adjusted accordingly according to usage requirements.

[0029] The reflective strip 32 increases the visibility of the object by reflecting light, and can reflect the surrounding light at night, thereby playing a certain warning role for passers-by and drivers, thereby improving the warning effect of the warning device.

[0030] When the radar 4 detects an intruding object, it triggers the high-decibel alarm sound and strobe light of the sound and light alarm 34 to remind personnel and prevent accidents.

[0031] The limit assembly 13 is used to limit the warning device and enhance the placement stability of the warning device. When the warning device works under severe weather conditions, the limit assembly 13 is started, and the electric cylinder 131 works to drive the negative pressure pump assembly 132 and the suction cup 133 at one end thereof to move downward, and the end suction cup 133 contacts the ground. At the same time, the negative pressure pump assembly 132 works to pump air through the air pipe 134, and the air in the suction cup 133 is pumped away to form a vacuum state. The air pressure inside the suction cup 133 is lower than the atmospheric pressure outside the suction cup 133. Under the action of the external atmospheric pressure, the suction cup 133 is tightly adsorbed on the ground, thereby improving the grip of the warning device, thereby improving the placement stability of the warning device. In windy weather, the limit assembly 13 can prevent the warning device from tipping over or displacing from the working area, so that the warning device can perform warning operations under severe weather conditions.

[0032] In some examples, the output shaft of the first motor 121 is fixedly connected to the driving gear 124, the roller assembly 122 is fixedly connected to the driven gear 125, and the driven gear 125 is meshed with the driving gear 124, and the driven gear 125 and the driving gear 124 are both located inside the gear transmission box 123.

[0033] When the first motor 121 is working, it drives the driving gear 124 at one end thereof to rotate, and through the meshing transmission between the teeth, the driving gear 124 drives the driven gear 125 to rotate, and the driven gear 125 drives the roller assembly 122 to rotate. The rotation direction and angle of the roller assembly 122 are controlled by the rotation direction and number of rotations of the output shaft of the first motor 121. The first motor 121 drives the roller assembly 122 to rotate, and the working state of the roller assembly 122 is switched.

[0034] In some examples, a mounting lug 126 is welded and fixed on the gear transmission box 123 , and a slot is provided on the mounting lug 126 , and the roller support foot 12 is fixedly connected to the base 1 by screws.

[0035] The gear transmission box 123 is fixed to the inner side of the base 1 by means of screws through the mounting lugs 126, so as to achieve the installation and fixation of the roller support foot 12. The roller support foot 12 and the base 1 are detachably connected, so that the roller support foot 12 is easy to replace and facilitates subsequent maintenance.

[0036] In some examples, the limiting assembly 13 is located between two sets of roller feet 12. When the warning device is limited, the limiting assemblies 13 on both sides work simultaneously to drive the suction cups 133 at the ends to move downward and contact the ground, thereby improving the grip of the warning device.

[0037] In some examples, radars 4 are installed at the corners of the upper end surface of the base 1. The radar 4 obtains the distance, speed and angle of the target object by sending electromagnetic waves to the target object and receiving echoes, and is used in conjunction with the sound and light alarm 34 to give warnings. When the radar 4 detects an intruding object, it can trigger the high-decibel alarm sound and strobe light of the sound and light alarm 34.

[0038] In some examples, the warning mechanism 3 includes a vertical plate 36 and a driving frame 37. The vertical plates 36 are provided in two groups, and a second motor 38 is installed on one group of the vertical plates 36. Connecting shafts 39 are welded and fixed on both sides of the driving frame 37. The connecting shafts 39 are connected to the vertical plates 36 through bearings, and the output shaft of the second motor 38 is fixedly connected to the connecting shaft 39 through a coupling.

[0039] When the warning device is not in use, Figure 1 As shown, the warning mechanism 3 of the warning device is in a flat state. Folding the warning mechanism 3 flat is helpful for transporting and storing the warning device. When the warning device is in use, Figure 2 As shown, the warning mechanism 3 of the warning device is in an upright state and performs a warning operation. The working state of the warning mechanism 3 is adjusted by the second motor 38. When the second motor 38 is working, it drives the connecting shaft 39 fixed thereto to rotate relative to the vertical plate 36. The connecting shaft 39 drives the driving frame 37 to rotate synchronously relative to the vertical plate 36. The driving frame 37 drives the warning mechanism 3 to rotate synchronously relative to the vertical plate 36, so as to adjust the working state of the warning mechanism 3. The position of the warning mechanism 3 is controlled by the rotation direction and number of rotations of the output shaft of the second motor 38.

[0040] In some examples, the reflective strip 32 is pasted and fixed on the outer frame of the display screen assembly 31. The reflective strip 32 is pasted and fixed on the front and rear ends of the outer frame of the display screen assembly 31 for full reflection. The connection method of the reflective strip 32 is simple, and the reflective strip 32 is easy to replace.

[0041] In some examples, the chassis 2 has a built-in battery module, which is rechargeable and can store electricity. The battery module can be charged and discharged multiple times through external charging and can be used with an external power supply. When the warning device cannot be connected to an external power supply, the warning device can be powered by the battery module.

[0042] By adopting the above technical solution: The warning device integrates a display screen assembly 31, a reflective strip 32, a strobe light assembly 33, an audible and visual alarm 34, a speaker assembly 35 and a radar 4. The display screen assembly 31 can select corresponding text and images for display according to actual usage needs, the speaker assembly 35 can perform voice broadcasts, the reflective strip 32 reflects light, and the strobe light assembly 33 reminds the driver of road hazards through strobe or strong light. When the radar 4 detects an intrusion, it can trigger the high-decibel alarm sound and strobe light of the audible and visual alarm 34, thereby improving the warning effect of the warning device.

[0043] The fixed legs 11 and the roller legs 12 are flexibly switched through the first motor 121. When the warning device is in a normal placement state, the four groups of fixed legs 11 at the lower corners of the base 1 are in contact with the ground. When the warning device needs to be moved, the roller assembly 122 is driven by the first motor 121 to rotate a certain angle to contact the ground, and lift up the fixed legs 11, and the warning device is quickly moved by the roller assembly 122 of the four groups of roller legs 12.

[0044] When the warning device is working under severe weather conditions, the warning device is limited by the limit component 13 to improve the grip of the warning device, thereby improving the placement stability of the warning device. In windy weather, the limit component 13 can prevent the warning device from tipping over or moving away from the working area, so that the warning device can perform warning operations under severe weather conditions.

[0045] When the warning device is not in use, the warning mechanism 3 is in a flat state. Folding the warning mechanism 3 and laying it flat facilitates the transportation and storage of the warning device.

[0046] Embodiment 2: Based on Example 1, this example introduces a specific structure of a driving frame 37 in a municipal vehicle warning device. The driving frame 37 includes a main frame body 371 and an adjustment frame 372. A groove is provided inside the main frame body 371. One end of the adjustment frame 372 is fixedly connected to the display screen assembly 31, and the other end of the adjustment frame 372 extends into the groove of the main frame body 371.

[0047] In some examples, the main frame body 371 and the adjustment frame 372 are fixedly connected by a tightening screw 373 . A screw hole is provided on the main frame body 371 , and the tightening screw 373 is threadedly connected to the screw hole of the main frame body 371 .

[0048] When the tightening screw 373 is loosened, the adjustment frame 372 can slide along the groove of the main frame body 371. At this time, the extension length of the adjustment frame 372 can be adjusted. By changing the extension length of the adjustment frame 372, the height position of the warning mechanism 3 can be adjusted. After the adjustment is completed, tighten the tightening screw 373 and re-tighten it. The height position of the warning mechanism 3 is flexibly adjustable, which improves the flexibility of the warning device during use.

[0049] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A municipal vehicle warning device, comprising a base (1), characterized in that: A chassis (2) is arranged on the base (1), a warning mechanism (3) is arranged on the chassis (2), fixed legs (11) are welded and fixed at the corners of the lower end of the base (1), roller legs (12) are arranged at the corners of the lower end surface of the base (1), and limiting components (13) are arranged on both sides of the base (1), the roller legs (12) include a first motor (121) and a roller component (122), the first motor (121) and the roller component (122) are connected via a gear transmission box (123), and the limiting component (13) includes an electric cylinder ( 131), one end of the push rod of the electric cylinder (131) is connected to a negative pressure pump assembly (132), the negative pressure pump assembly (132) is connected to a suction cup (133), an air pipe (134) is provided between the negative pressure pump assembly (132) and the suction cup (133), the warning mechanism (3) comprises a display screen assembly (31), a reflective strip (32) is provided on an outer frame of the display screen assembly (31), a flashing light assembly (33) is provided on the top of the display screen assembly (31), and sound and light alarms (34) and speaker assemblies (35) are provided on both sides of the display screen assembly (31).

2. A municipal vehicle warning device according to claim 1, characterized in that: The output shaft of the first motor (121) is fixedly connected to the driving gear (124), the roller assembly (122) is fixedly connected to the driven gear (125), and the driven gear (125) is meshed with the driving gear (124), and the driven gear (125) and the driving gear (124) are both located inside the gear transmission box (123).

3. A municipal vehicle warning device according to claim 1, characterized in that: A mounting lug (126) is welded and fixed on the gear transmission box (123), and a notch is provided on the mounting lug (126). The roller support foot (12) is fixedly connected to the base (1) by means of screws.

4. A municipal vehicle warning device according to claim 1, characterized in that: The limiting assembly (13) is located between the two sets of roller feet (12).

5. A municipal vehicle warning device according to claim 1, characterized in that: Radars (4) are installed at the corners of the upper end surface of the base (1).

6. A municipal vehicle warning device according to claim 1, characterized in that: The warning mechanism (3) comprises a vertical plate (36) and a driving frame (37), wherein the vertical plates (36) are provided in two groups, wherein a second motor (38) is mounted on one group of the vertical plates (36), and connecting shafts (39) are welded and fixed on both sides of the driving frame (37), wherein the connecting shaft (39) is connected to the vertical plate (36) via a bearing, and an output shaft of the second motor (38) is fixedly connected to the connecting shaft (39) via a coupling.

7. A municipal vehicle warning device according to claim 1, characterized in that: The reflective strip (32) is glued and fixed on the outer frame of the display screen assembly (31).

8. A municipal vehicle warning device according to claim 1, characterized in that: The chassis (2) has a built-in battery module.

9. A municipal vehicle warning device according to claim 6, characterized in that: The driving frame (37) comprises a main frame body (371) and an adjusting frame (372); a groove is provided inside the main frame body (371); one end of the adjusting frame (372) is fixedly connected to the display screen assembly (31); and the other end of the adjusting frame (372) extends into the groove of the main frame body (371).

10. A municipal vehicle warning device according to claim 9, characterized in that: The main frame body (371) and the adjustment frame (372) are fixedly connected via a tightening screw (373).

Images