A signal light for rail transit engineering with easy angle adjustment

Abstract

The present invention relates to the technical field of signal lamps, and discloses a signal lamp for rail transit engineering that is easy to adjust the angle, comprising a base, a pulley fixedly mounted on the bottom of the base, a solar panel fixedly mounted on the surface of the base, and an auxiliary component arranged on the side wall of the base, wherein the auxiliary component comprises a cleaning mechanism installed on the side wall of the base, one end of the cleaning mechanism is installed on the inner wall of the base, and the other end of the cleaning mechanism passes through the top of the base and extends to the outer side of the base. The present invention solves the problem that the existing device drives the position of the support rod to rotate by a motor to further adjust the angle of the signal lamp, but the device is exposed to the air for a long time. During the long-term use of the signal lamp, there will be a lot of dust on the surface. If it is not cleaned in time, it may cause blurred vision of pedestrians, thereby reducing the efficiency of the device.

Description

Technical Field

[0001] The invention relates to the technical field of signal lamps, and in particular to a signal lamp for rail transit engineering that is easy to adjust in angle. Background Art

[0002] Traffic lights are lights that direct traffic, and are generally composed of red, green, and yellow lights. Red lights indicate that passage is prohibited, green lights indicate that passage is permitted, and yellow lights indicate warnings. In rail transit projects, traffic lights are also used for the safety of operators, so rail transit lights that are easy to adjust in angle are used.

[0003] For example, Chinese patent CN215954508U discloses a signal light for rail transit engineering that is easy to adjust the angle. When the device passes, the motor can drive the second gear to rotate, and when the second gear rotates, it can drive the first gear to rotate in meshing, and when the first gear rotates, it drives the first support rod to rotate, and when the first support rod rotates, it can rotate with the operating slot, and when the first support rod rotates, it can drive the control box to rotate, and when the control box rotates, it can drive the red light and the green light to rotate, aiming the green light at the train, and the red light at the pedestrians and vehicles. When the train leaves, the green light can be aimed at the pedestrians and vehicles, and the red light can be aimed at the train track, so that the signal light can be adjusted according to the needs.

[0004] However, there are certain defects in this patent. The device uses a motor to drive the position of the support rod to rotate, thereby further adjusting the angle of the signal light. However, the device is exposed to the air for a long time. During the long-term use of the signal light, there will be a lot of dust on the surface. If it is not cleaned in time, it may cause blurred vision for pedestrians and reduce the efficiency of the device. Summary of the invention

[0005] The purpose of the present invention is to provide a signal light for rail transit engineering that is easy to adjust the angle, so as to achieve the purpose of solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a signal light for rail transit engineering that is easy to adjust the angle, comprising a base,

[0007] A pulley fixedly mounted on the bottom of the base;

[0008] A solar panel fixedly mounted on the surface of the base;

[0009] and an auxiliary component disposed at a side wall of the base;

[0010] The auxiliary component includes a cleaning mechanism installed at a side wall of the base, one end of the cleaning mechanism is installed at the inner wall of the base, and the other end of the cleaning mechanism passes through the top of the base and extends to the outer side of the base;

[0011] An adjustment mechanism is installed on the side wall of the base, the adjustment mechanism is located at the top of the base, and the adjustment mechanism is located on one side of the cleaning mechanism;

[0012] The side walls of the base are provided with stabilizing mechanisms, which are respectively located at the left and right sides of the base.

[0013] Preferably, there are four pulleys, the shapes and sizes of the four pulleys are equal, and the four pulleys are fixedly installed at the four corners of the bottom of the base respectively, and the position of the device can be effectively moved through the pulleys.

[0014] Preferably, the cleaning mechanism comprises a motor, which is fixedly mounted on the inner wall of the base. The motor extends to the outside of the base through a rotating shaft at the output end thereof, and is rotatably connected to the inner wall of the base.

[0015] Preferably, a transmission wheel is fixedly installed on the rotating shaft at the output end of the motor, a long rod is installed on the surface of the transmission wheel through a transmission belt, a turntable is fixedly installed on the top of the long rod, a hinge block is hingedly installed on the surface of the turntable, a sliding block is hingedly installed on the other end of the hinge block, a sealing block is sealed on the side wall of the sliding block, a transport pipe is fixedly installed on the top of the sealing block, the other end of the transport pipe passes through the inner wall of the base and extends to the outside of the base, a water tank is fixedly installed on the other end of the transport pipe, an arc block is fixedly installed on the side wall of the water tank, a column is fixedly installed on the inner wall of the water tank, a sleeve block is fixedly installed on the top of the column, a nozzle is fixedly installed on the inner wall of the sleeve block, a water pipe is fixedly installed on the side wall of the nozzle, and the other end of the water pipe is fixedly connected to the top of the water tank.

[0016] Preferably, the bottom of the column is fixedly connected to the top of the base, the side wall of the sealing block is fixedly connected to the inner wall of the base, the inner wall of the sealing block is slidably connected to the surface of the sliding block, and a disc is rotatably installed at the bottom of the long rod, and the bottom of the disc is fixedly connected to the inner wall of the base.

[0017] Preferably, the interior of the sealing block is connected to the inner wall of the transport pipe, the interior of the transport pipe is connected to the interior of the water tank, the interior of the water tank is connected to the inner wall of the water pipe, and the interior of the water pipe is connected to the inner wall of the nozzle.

[0018] Preferably, the adjustment mechanism includes a first bracket block, the first bracket block is fixedly mounted on the top of the rotating shaft, a second bracket block is slidably mounted on the inner wall of the first bracket block, a rectangular plate is fixedly mounted on the top of the second bracket block, a signal light is fixedly mounted on the top of the rectangular plate, a clamping bolt is mounted on the inner wall of the first bracket block, and a nut is mounted on the surface of the clamping bolt.

[0019] Preferably, the inner wall of the first bracket block is slidably connected to the side wall of the clamping bolt, one end of the clamping bolt passes through the inner wall of the second bracket block, the side wall of the clamping bolt is slidably connected to the inner wall of the second bracket block, the side wall of the clamping bolt is threadedly connected to the inner wall of the nut, and the nut can effectively stabilize the position of the clamping bolt.

[0020] Preferably, the stabilizing mechanism includes a stabilizing block, which is fixedly mounted on the side wall of the base, a threaded rod is threadedly mounted on the inner wall of the stabilizing block, a circular block is rotatably mounted on the bottom of the threaded rod, a rubber disc is fixedly mounted on the bottom of the circular block, and a rotating block is fixedly mounted on the top of the threaded rod, and when the threaded rod rotates, the position of the rubber disc can be effectively driven to move.

[0021] Preferably, there are two rubber discs, the two rubber discs are equal in shape and size, and the two rubber discs are symmetrically arranged on the left and right middle planes of the base.

[0022] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0023] (1) The present invention enables an operator to turn on the motor, and the motor effectively drives the position of the transmission wheel to rotate through the rotating shaft at the output end. The transmission wheel can wash the surface of the signal light under the joint action of the transmission belt, long rod, disc, turntable, hinge block, sliding block, sealing block, transport pipe, water tank, water pipe and nozzle, thereby improving the cleanliness of the signal light surface. The device solves the problem of rotating the support rod through the motor to further adjust the angle of the signal light. However, the device is exposed to the air for a long time. During the long-term use of the signal light, there will be a lot of dust on the surface. If it is not cleaned in time, it may cause blurred vision of pedestrians, thereby reducing the efficiency of the device.

[0024] (2) In the present invention, when the operator adjusts the angle of the signal light, the motor can be directly turned on. Under the joint action of the first bracket block and the rectangular plate, the motor can effectively adjust the angle of the signal light, thereby improving the performance of the device.

[0025] (3) In the present invention, when the operator adjusts the height of the signal light, the position of the second bracket block can be directly moved. The second bracket block is on the surface of the first bracket block, the clamping bolts, the nuts, and the clamping bolts, and the height of the signal light can be effectively adjusted to a suitable height so that pedestrians can see it clearly.

[0026] (4) The present invention allows an operator to rotate the position of the rotating block. Under the joint action of the threaded rod, the stabilizing block, the annular block and the rubber disk, when the bottom of the rubber disk contacts the ground, the operator can quickly stabilize the position of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the appearance structure of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the auxiliary components of the present invention;

[0030] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention;

[0031] Figure 4 It is a structural schematic diagram of the cleaning mechanism of the present invention;

[0032] Figure 5 It is a partial structural schematic diagram of the regulating mechanism of the present invention;

[0033] Figure 6 It is a partial structural schematic diagram of the cleaning mechanism of the present invention;

[0034] Figure 7 It is a structural schematic diagram of the stabilizing mechanism of the present invention.

[0035] In the figure: 1, base; 2, pulley; 3, solar panel; 4, auxiliary component; 41, cleaning mechanism; 411, motor; 412, transmission wheel; 413, transmission belt; 414, long rod; 415, disc; 416, turntable; 417, hinge block; 418, sliding block; 419, sealing block; 4110, transport pipe; 4111, water tank; 4112, column; 4113, water pipe; 4114, arc block; 4115, sleeve block; 4116, nozzle; 42, adjustment mechanism; 421, clamping bolt; 422, nut; 423, first bracket block; 424, second bracket block; 425, rectangular plate; 426, signal light; 43, stabilizing mechanism; 431, rubber disc; 432, stabilizing block; 433, threaded rod; 434, circular ring block; 435, rotating block. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention. Example 1

[0038] like Figure 1-7 As shown, the present invention provides a technical solution: a signal light for rail transit engineering that is easy to adjust the angle, comprising a base 1,

[0039] A pulley 2 is fixedly mounted on the bottom of the base 1. There are four pulleys 2. The four pulleys 2 are of equal shape and size. The four pulleys 2 are respectively fixedly mounted at the four corners of the bottom of the base 1. The position of the device can be effectively moved through the pulleys 2.

[0040] A solar panel 3 fixedly mounted on the surface of the base 1;

[0041] and an auxiliary component 4 disposed on the side wall of the base 1;

[0042] The auxiliary component 4 includes a cleaning mechanism 41 installed at the side wall of the base 1, one end of the cleaning mechanism 41 is installed on the inner wall of the base 1, and the other end of the cleaning mechanism 41 passes through the top of the base 1 and extends to the outer side of the base 1. The cleaning mechanism 41 includes a motor 411, which is fixedly installed on the inner wall of the base 1. The motor 411 passes through the inner wall of the base 1 through the rotating shaft at the output end and extends to the outer side of the base 1, and is rotatably connected to the inner wall of the base 1. The motor 411 is fixedly installed with a transmission wheel 412 through the rotating shaft at the output end. When the operator adjusts the angle of the signal light 426, the motor 411 can be directly turned on. Under the joint action of the first bracket block 423 and the rectangular plate 425, the motor 411 effectively adjusts the angle of the signal light 426. The angle of the lamp 426 can be adjusted to improve the performance of the device. A long rod 414 is installed on the surface of the driving wheel 412 through a driving belt 413. A turntable 416 is fixedly installed on the top of the long rod 414. A hinge block 417 is hingedly installed on the surface of the turntable 416. A sliding block 418 is hingedly installed on the other end of the hinge block 417. A sealing block 419 is sealed and connected to the side wall of the sliding block 418. A transport pipe 4110 is fixedly installed on the top of the sealing block 419. The other end of the transport pipe 4110 passes through the inner wall of the base 1 and extends to the outside of the base 1. A water tank 4111 is fixedly installed on the other end of the transport pipe 4110. An arc block 4114 is fixedly installed on the side wall of the water tank 4111. A column 4112 is fixedly installed on the inner wall of the water tank 4111. A sleeve block 4115 is fixedly installed on the top of the column 4112, a nozzle 4116 is fixedly installed on the inner wall of the sleeve block 4115, a water pipe 4113 is fixedly installed on the side wall of the nozzle 4116, the other end of the water pipe 4113 is fixedly connected to the top of the water tank 4111, the bottom of the column 4112 is fixedly connected to the top of the base 1, the side wall of the sealing block 419 is fixedly connected to the inner wall of the base 1, the inner wall of the sealing block 419 is slidably connected to the surface of the sliding block 418, a disc 415 is rotatably installed on the bottom of the long rod 414, the bottom of the disc 415 is fixedly connected to the inner wall of the base 1, the interior of the sealing block 419 is connected to the inner wall of the transport pipe 4110, the interior of the transport pipe 4110 is connected to the interior of the water tank 4111, and the water tank 4111 is connected to the inner wall of the water tank 4111. The interior of 111 is connected to the inner wall of water pipe 4113, and the interior of water pipe 4113 is connected to the inner wall of nozzle 4116. The operator turns on motor 411, and motor 411 effectively drives the position of transmission wheel 412 to rotate through the rotating shaft at the output end. Under the joint action of transmission belt 413, long rod 414, disc 415, turntable 416, hinge block 417, sliding block 418, sealing block 419, transport pipe 4110, water tank 4111, water pipe 4113, and nozzle 4116, transmission wheel 412 can wash the surface of signal lamp 426, improve the cleanliness of the surface of signal lamp 426, solve the problem that the device drives the position of support rod to rotate through the motor, and further adjust the angle of signal lamp.However, the device is exposed to the air for a long time. During the long-term use of the signal light, there will be a lot of dust on the surface. If it is not cleaned in time, it may cause blurred vision for pedestrians and reduce the efficiency of the device.

[0043] When the operator adjusts the angle of the signal light 426, the motor 411 can be directly turned on. The motor 411 effectively drives the first bracket block 423 to rotate through the rotating shaft at the output end. The first bracket block 423 further drives the rectangular plate 425 and the signal light 426 to rotate, effectively adjusting the angle of the signal light 426. The motor 411 effectively drives the transmission wheel 412 to rotate through the rotating shaft at the output end. The transmission wheel 412 effectively drives the position of the long rod 414 to rotate under the action of the transmission belt 413. The long rod 414 rotates on the top of the disc 415. The rod 414 effectively drives the position of the rotating disk 416 to rotate. Under the action of the hinge block 417, the rotating disk 416 effectively drives the sliding block 418 to slide inside the sealing block 419. When the sliding block 418 slides, the air inside the sealing block 419 is effectively compressed, and the compressed air is further squeezed into the inside of the water tank 4111 through the transport pipe 4110, and the water inside the water tank 4111 is effectively compressed into the inside of the water pipe 4113, and further sprayed out through the nozzle 4116. When the rotation angle of the signal light 426 is reached, the surface of the signal light 426 can be washed; Example 2

[0044] On the basis of Example 1, an adjusting mechanism 42 is installed on the side wall of the base 1, the adjusting mechanism 42 is located at the top position of the base 1, and the adjusting mechanism 42 is located at one side position of the cleaning mechanism 41. The adjusting mechanism 42 includes a first bracket block 423, the first bracket block 423 is fixedly installed on the top of the rotating shaft, the inner wall of the first bracket block 423 is slidably installed with a second bracket block 424, the top of the second bracket block 424 is fixedly installed with a rectangular plate 425, the top of the rectangular plate 425 is fixedly installed with a signal light 426, the inner wall of the first bracket block 423 is installed with a clamping bolt 421, the surface of the clamping bolt 421 is installed with a nut 422, and the inner wall of the first bracket block 423 is slidably connected to the side wall of the clamping bolt 421 One end of the clamping bolt 421 passes through the inner wall of the second bracket block 424, the side wall of the clamping bolt 421 is slidably connected to the inner wall of the second bracket block 424, and the side wall of the clamping bolt 421 is threadedly connected to the inner wall of the nut 422. The nut 422 can effectively stabilize the position of the clamping bolt 421. When the operator adjusts the height of the position of the device signal light 426, the position of the second bracket block 424 can be directly moved. The second bracket block 424 is on the surface of the first bracket block 423, the clamping bolt 421, the nut 422, and the clamping bolt 421, and the height of the signal light 426 can be effectively adjusted to a suitable height so that pedestrians can see it clearly.

[0045] When the operator needs to adjust the height of the position of the device signal light 426, the position of the second bracket block 424 can be directly moved to enable the second bracket block 424 to effectively slide inside the first bracket block 423. When the signal light 426 is adjusted to a suitable position, the clamping bolt 421 can be inserted into the first bracket block 423 and further penetrate the inner wall of the second bracket block 424. Then, the position of the nut 422 can be rotated, and the nut 422 can be effectively installed on the surface of the clamping bolt 421, effectively stabilizing the position of the signal light 426. Example 3

[0046] On the basis of Example 1 and Example 2, a stabilizing mechanism 43 is installed on the side wall of the base 1. The stabilizing mechanism 43 is respectively located at the left and right sides of the base 1. The stabilizing mechanism 43 includes a stabilizing block 432. The stabilizing block 432 is fixedly installed on the side wall of the base 1. A threaded rod 433 is threadedly installed on the inner wall of the stabilizing block 432. A circular ring block 434 is rotatably installed at the bottom of the threaded rod 433. A rubber disk 431 is fixedly installed at the bottom of the circular ring block 434. A rotating block 435 is fixedly installed on the top of the threaded rod 433. The threaded rod 433 is rotated when being rotated. When rotating, the position of the rubber disc 431 can be effectively driven to move. There are two rubber discs 431. The shapes and sizes of the two rubber discs 431 are equal. The two rubber discs 431 are symmetrically arranged on the left and right middle planes of the base 1. The operator rotates the position of the rotating block 435. Under the joint action of the threaded rod 433, the stabilizing block 432, the annular block 434, and the rubber disc 431, when the bottom of the rubber disc 431 contacts the ground, it is convenient for the operator to quickly stabilize the position of the device.

[0047] The operator first moves the position of the device through the pulley 2 to effectively move the device to the appropriate position, and then directly rotates the position of the rotating block 435. The rotating block 435 effectively drives the position of the threaded rod 433 to rotate. Since the side wall of the threaded rod 433 is threadedly connected to the inner wall of the stabilizing block 432, the threaded rod 433 can effectively drive the position of the circular block 434 to descend when it rotates. The circular block 434 effectively drives the position of the rubber disk 431 to descend. When the bottom of the rubber disk 431 contacts the ground, the position of the device can be effectively stabilized.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A signal light for rail transit engineering that is easy to adjust the angle, comprising a base (1), A pulley (2) fixedly mounted on the bottom of the base (1); and an auxiliary component (4) arranged on the side wall of the base (1); characterized in that: The auxiliary component (4) comprises a cleaning mechanism (41) mounted on a side wall of the base (1), one end of the cleaning mechanism (41) being mounted on an inner wall of the base (1), and the other end of the cleaning mechanism (41) penetrating through the top of the base (1) and extending to an outer position of the base (1); An adjusting mechanism (42) is installed at a side wall of the base (1), the adjusting mechanism (42) is located at a top position of the base (1), and the adjusting mechanism (42) is located at a side position of the cleaning mechanism (41); the adjusting mechanism (42) comprises a first bracket block (423), the first bracket block (423) is fixedly installed at the top of the rotating shaft, a second bracket block (424) is slidably installed on the inner wall of the first bracket block (423), a rectangular plate (425) is fixedly installed on the top of the second bracket block (424), a signal light (426) is fixedly installed on the top of the rectangular plate (425), a clamping bolt (421) is installed on the inner wall of the first bracket block (423), and a nut (422) is installed on the surface of the clamping bolt (421); A stabilizing mechanism (43) is installed on the side wall of the base (1), and the stabilizing mechanism (43) is located at the left and right sides of the base (1) respectively; The cleaning mechanism (41) comprises a motor (411), wherein the motor (411) is fixedly mounted on the inner wall of the base (1), and the motor (411) extends through the inner wall of the base (1) to the outer side of the base (1) via a rotating shaft at the output end, and is rotatably connected to the inner wall of the base (1), wherein a transmission wheel (412) is fixedly mounted on the motor (411) via the rotating shaft at the output end, and a long rod (414) is installed on the surface of the transmission wheel (412) via a transmission belt (413), and a rotating disk (416) is fixedly mounted on the top of the long rod (414), and a hinge block (417) is hingedly mounted on the surface of the rotating disk (416), and a sliding block (418) is hingedly mounted on the other end of the hinge block (417), and a side wall of the sliding block (418) is sealed and connected to a sealing block (416). 19), a transport pipe (4110) is fixedly installed on the top of the sealing block (419), the other end of the transport pipe (4110) penetrates the inner wall of the base (1) and extends to the outside of the base (1), a water tank (4111) is fixedly installed on the other end of the transport pipe (4110), an arc block (4114) is fixedly installed on the side wall of the water tank (4111), a column (4112) is fixedly installed on the inner wall of the water tank (4111), a sleeve block (4115) is fixedly installed on the top of the column (4112), a nozzle (4116) is fixedly installed on the inner wall of the sleeve block (4115), a water pipe (4113) is fixedly installed on the side wall of the nozzle (4116), and the other end of the water pipe (4113) is fixedly connected to the top of the water tank (4111).

2. The signal light for rail transit engineering with easy angle adjustment according to claim 1, characterized in that: There are four pulleys (2), the four pulleys (2) are of equal shape and size, and the four pulleys (2) are respectively fixedly mounted at the four corners of the bottom of the base (1).

3. The signal light for rail transit engineering with easy angle adjustment according to claim 2, characterized in that: The bottom of the column (4112) is fixedly connected to the top of the base (1), the side wall of the sealing block (419) is fixedly connected to the inner wall of the base (1), the inner wall of the sealing block (419) is slidably connected to the surface of the sliding block (418), and a disc (415) is rotatably mounted on the bottom of the long rod (414), and the bottom of the disc (415) is fixedly connected to the inner wall of the base (1).

4. The signal light for rail transit engineering with easy angle adjustment according to claim 3, characterized in that: The interior of the sealing block (419) is connected to the inner wall of the transport pipe (4110), the interior of the transport pipe (4110) is connected to the interior of the water tank (4111), the interior of the water tank (4111) is connected to the inner wall of the water pipe (4113), and the interior of the water pipe (4113) is connected to the inner wall of the nozzle (4116).

5. The signal light for rail transit engineering with easy angle adjustment according to claim 4, characterized in that: The inner wall of the first bracket block (423) is slidably connected to the side wall of the clamping bolt (421), one end of the clamping bolt (421) passes through the inner wall of the second bracket block (424), the side wall of the clamping bolt (421) is slidably connected to the inner wall of the second bracket block (424), and the side wall of the clamping bolt (421) is threadedly connected to the inner wall of the nut (422).

6. The signal light for rail transit engineering with easy angle adjustment according to claim 5, characterized in that: The stabilizing mechanism (43) comprises a stabilizing block (432), the stabilizing block (432) being fixedly mounted on the side wall of the base (1), a threaded rod (433) being threadedly mounted on the inner wall of the stabilizing block (432), a circular block (434) being rotatably mounted on the bottom of the threaded rod (433), a rubber disc (431) being fixedly mounted on the bottom of the circular block (434), and a rotating block (435) being fixedly mounted on the top of the threaded rod (433).

7. The signal light for rail transit engineering with easy angle adjustment according to claim 6, characterized in that: There are two rubber discs (431), the two rubber discs (431) are equal in shape and size, and the two rubber discs (431) are symmetrically arranged on the left and right middle planes of the base (1).

Images