Hydraulic breaking hammer with dust falling function

Abstract

The invention provides a hydraulic breaking hammer with a dust falling function, and belongs to the technical field of hydraulic breaking hammers, the hydraulic breaking hammer comprises a hammer body and a drill rod, a second channel is formed in the hammer body, one end of the drill rod extends into the second channel, and the other end of the drill rod extends to the bottom of the hammer body; the device further comprises a spraying assembly, a main piston rod, an auxiliary piston rod and a dust detection assembly. A first channel is further formed in the hammer body, and the main piston rod is arranged in the second channel and controlled by a hydraulic system to move up and down in the second channel in a reciprocating mode. Compared with the prior art, according to the embodiment of the invention, when the drill rod carries out crushing operation, not only can dust settling be carried out, but also whether dust falling is carried out or not can be automatically selected according to the amount of dust around the drill rod, so that meaningless dust falling operation is avoided when the amount of dust around the drill rod is small, and the purpose of saving water resources is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydraulic break hammers, and specifically relates to a hydraulic break hammer with a dust reduction function. Background Art

[0002] A hydraulic break hammer is an important engineering crushing tool, which is an impact device that converts hydraulic energy into mechanical energy. The hydraulic break hammer is installed on a machine and connected to a hydraulic system. High-pressure fluid from the hydraulic system is supplied to the hydraulic break hammer to drive the piston rod to reciprocate. When the piston rod strokes, it hits the drill rod at high speed, and the drill rod breaks solids such as walls or the ground to complete the crushing task.

[0003] Currently, when the drill rod of a hydraulic break hammer is performing a crushing operation, the drill rod will transmit vibration force to the ground or wall. When there is a lot of dust on the ground or wall, a large amount of dust will be raised with the vibration and then accumulate around the drill rod, blocking the line of sight of the operator and thus affecting the smooth progress of the crushing operation. Summary of the Invention

[0004] Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the embodiments of the present invention is to provide a hydraulic break hammer with a dust reduction function.

[0005] To solve the above technical problem, the present invention provides the following technical solutions: A hydraulic break hammer with a dust reduction function includes a hammer body and a drill rod. A second channel is opened inside the hammer body. One end of the drill rod extends into the second channel, and the other end extends to the bottom of the hammer body. It also includes a spray component, a main piston rod, a sub-piston rod, and a dust detection component; A first channel is also opened inside the hammer body. The main piston rod is arranged inside the second channel and is controlled by the hydraulic system to reciprocate up and down inside the second channel; The sub-piston rod is arranged inside the first channel and is controlled by the main piston rod to reciprocate up and down inside the first channel; The spray component is installed at the bottom of the hammer body, and the dust detection component is arranged inside the first channel. When the drill rod is performing a crushing operation, the dust detection component is used to detect the dust around the drill rod; When the dust detection component detects less dust, the sub-piston rod performs an air pumping action. When the dust detection component detects more dust, the sub-piston rod performs a water pumping action to press out the water source through the spray component to achieve dust settlement.

[0006] As a further improvement of the present invention: a water inlet pipe is provided on the side wall of the hammer body. One end of the water inlet pipe is connected to an external water tank, and the other end is communicated with the first channel. A first notch for communicating the first channel with the second channel is opened inside the hammer body. A connecting rod is fixedly provided on the side wall of the auxiliary piston rod. One end of the connecting rod away from the auxiliary piston rod extends into the second channel from the first notch and is fixedly connected to the main piston rod; The spraying assembly includes a support pipe and an annular pipe. One end of the support pipe is fixedly connected to the bottom wall of the hammer body and is communicated with the first channel, and the other end is communicated with the annular pipe. The annular pipe is arranged around the outside of the drill rod. A plurality of spray holes are opened at the bottom of the annular pipe at intervals; The dust detection assembly includes a detection pipe and a partition net fixedly arranged inside the detection pipe. The detection pipe is movably arranged inside the first channel. A water inlet hole corresponding to the water inlet pipe is opened on the side wall of the detection pipe. A check valve is arranged inside the water inlet pipe.

[0007] As a further improvement of the present invention: a one-way valve assembly is further arranged inside the hammer body. When the detection pipe moves upward along the inside of the first channel and the water inlet pipe is communicated with the water inlet hole, the one-way valve assembly is used to cooperate with the upward movement of the auxiliary piston rod to perform one-way closing of the first channel.

[0008] As a further improvement of the present invention: a second notch is opened on one side of the inside of the hammer body where the first channel is located; The one-way valve assembly includes an annular plate, a one-way valve and a second elastic member. The annular plate is movably arranged inside the second notch. One end of the second elastic member is connected to the annular plate, and the other end is connected to the inner wall of the second notch, and is used to provide elastic support for the annular plate. The one-way valve is arranged inside the annular plate.

[0009] As a further improvement of the present invention: a reset assembly is further arranged inside the hammer body. After the drill rod finishes the crushing operation, the reset assembly is used to drive the detection pipe to move downward along the inside of the first channel to realize the reset of the detection pipe.

[0010] As a further improvement of the present invention: the reset assembly includes an annular stopper and a first elastic member. The annular stopper is fixedly arranged inside the first channel. One end of the first elastic member is connected to the annular stopper, and the other end is connected to the detection pipe, and is used to provide elastic support for the detection pipe. A pull rod is also fixedly arranged on the side wall of the annular plate. One end of the pull rod away from the annular plate extends outside the hammer body.

[0011] As a further improvement of the present invention: the first elastic member and the second elastic member are springs or metal shrapnel.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: In the embodiment of the present invention, when a crushing operation is required, the hydraulic system is used to control the main piston rod to reciprocate up and down inside the second channel, and then repeatedly impact the drill rod. The drill rod transmits the impact force to the wall or ground to be crushed, thereby realizing the crushing of the wall or ground. When the main piston rod reciprocates up and down inside the second channel, the main piston rod can also drive the auxiliary piston rod to reciprocate up and down inside the first channel. At the same time, the dust detection component is used to detect the dust raised around the drill rod. When the dust detection component detects that the raised dust is less, the auxiliary piston rod only performs the action of pumping air, rather than pumping water; when the dust detection component detects that the raised dust is more, the auxiliary piston rod performs the action of pumping water and presses the water out through the spraying component. After the water is pressed out, it acts on the dust raised around the drill rod, thereby performing sedimentation treatment on the dust, so as to avoid blocking the sight of the wall or ground around the drill rod due to excessive dust, enabling the staff to smoothly carry out the crushing operation. Compared with the prior art, when the drill rod is performing a crushing operation, not only can dust sedimentation be carried out, but also it can be self-selected whether to perform dust reduction according to the amount of dust around the drill rod, thereby avoiding meaningless dust reduction operations when the amount of dust around the drill rod is less, achieving the purpose of saving water resources. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of a hydraulic breaker with a dust reduction function; Figure 2 is a schematic structural diagram inside a hydraulic breaker with a dust reduction function; Figure 3 is Figure 2 an enlarged schematic diagram of area A in Figure 4 is Figure 2 an enlarged schematic diagram of area B in In the figure: 10 - hammer body, 101 - second channel, 102 - water inlet pipe, 103 - first channel, 104 - first notch, 105 - second notch, 20 - drill rod, 30 - spraying component, 301 - support pipe, 302 - annular pipe, 303 - spray hole, 40 - main piston rod, 50 - auxiliary piston rod, 501 - connecting rod, 60 - dust detection component, 601 - detection pipe, 602 - water inlet hole, 603 - partition net, 70 - reset component, 701 - annular block, 702 - first elastic member, 80 - one-way valve component, 801 - annular plate, 802 - one-way valve, 803 - pull rod, 804 - second elastic member. Detailed Embodiments

[0014] The technical solutions of the present invention will be further described in detail below in conjunction with the specific embodiments.

[0015] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0016] Please refer to Figure 1 and Figure 2 , this embodiment provides a hydraulic breaker with a dust reduction function, including a hammer body 10, a drill rod 20, a spray assembly 30, a main piston rod 40, a sub-piston rod 50, and a dust detection assembly 60. A first channel 103 and a second channel 101 are formed inside the hammer body 10. One end of the drill rod 20 extends into the second channel 101, and the other end extends to the bottom of the hammer body 10. The main piston rod 40 is arranged inside the second channel 101 and is controlled by a hydraulic system (not shown in the figure) to reciprocate up and down inside the second channel 101. The sub-piston rod 50 is arranged inside the first channel 103 and is controlled by the main piston rod 40 to reciprocate up and down inside the first channel 103. The spray assembly 30 is installed at the bottom of the hammer body 10, and the dust detection assembly 60 is arranged inside the first channel 103. When the drill rod 20 performs a crushing operation, the dust detection assembly 60 is used to detect the dust around the drill rod 20. When the dust detection assembly 60 detects less dust, the sub-piston rod 50 performs an air pumping action. When the dust detection assembly 60 detects more dust, the sub-piston rod 50 performs a water pumping action to press out the water source through the spray assembly 30 to achieve dust settlement.

[0017] When a crushing operation needs to be performed, the main piston rod 40 is controlled by the hydraulic system to reciprocate up and down inside the second channel 101, and then repeatedly impacts the drill rod 20. The drill rod 20 transmits the impact force to the wall or ground to be crushed, thereby realizing the crushing of the wall or ground. When the main piston rod 40 reciprocates up and down inside the second channel 101, the main piston rod 40 can also drive the sub-piston rod 50 to reciprocate up and down inside the first channel 103. At the same time, the dust detection assembly 60 is used to detect the dust raised around the drill rod 20. When the dust detection assembly 60 detects less raised dust, the sub-piston rod 50 only performs an air pumping action instead of a water pumping action. When the dust detection assembly 60 detects more raised dust, the sub-piston rod 50 performs a water pumping action and presses out the water source through the spray assembly 30. After the water source is pressed out, it acts on the dust raised around the drill rod 20, thereby performing dust settlement treatment to avoid blocking the sight of the wall or ground around the drill rod 20 due to excessive dust, so that the staff can smoothly perform the crushing operation.

[0018] Please refer to Figure 1 、 Figure 2 and Figure 4 , in one embodiment, a water inlet pipe 102 is provided on the side wall of the hammer body 10. One end of the water inlet pipe 102 is connected to an external water tank (not shown in the figure), and the other end is communicated with the first channel 103. A first notch 104 for communicating the first channel 103 with the second channel 101 is opened inside the hammer body 10. A connecting rod 501 is fixedly provided on the side wall of the auxiliary piston rod 50. One end of the connecting rod 501 away from the auxiliary piston rod 50 extends from the first notch 104 into the second channel 101 and is fixedly connected to the main piston rod 40. The spraying assembly 30 includes a support pipe 301 and an annular pipe 302. One end of the support pipe 301 is fixedly connected to the bottom wall of the hammer body 10 and is communicated with the first channel 103, and the other end is communicated with the annular pipe 302. The annular pipe 302 is arranged around the outside of the drill rod 20. A plurality of spray holes 303 are opened at the bottom of the annular pipe 302. The dust detection assembly 60 includes a detection pipe 601 and a partition net 603 fixedly arranged inside the detection pipe 601. The detection pipe 601 is movably arranged inside the first channel 103. A water inlet hole 602 corresponding to the water inlet pipe 102 is opened on the side wall of the detection pipe 601. A check valve (not shown in the figure) is arranged inside the water inlet pipe 102.

[0019] Initially, the detection tube 601 is located inside the first channel 103, and the water inlet hole 602 is located below the water inlet pipe 102. The side wall of the detection tube 601 is blocked against the water inlet pipe 102. When the hydraulic system controls the main piston rod 40 to move up and down along the inside of the second channel 101 and then repeatedly hits the drill rod 20, the main piston rod 40 drives the auxiliary piston rod 50 to move up and down synchronously along the inside of the first channel 103 through the connecting rod 501. When the auxiliary piston rod 50 moves upward, the auxiliary piston rod 50 extracts the dust around the drill rod 20 together with the air through the spray hole 303 into the inside of the annular tube 302, and then the dust is sucked into the annular tube 302 by the support tube 303. 1 is extracted into the first channel 103, and the dust and air enter the first channel 103 and then pass through the detection tube 601. At this time, the dust is blocked at the bottom of the partition 603, while the air directly passes through the partition 603. When the auxiliary piston rod 50 moves downward, the auxiliary piston rod 50 reversely presses the air inside the first channel 103 to the outside through the support tube 301, the ring tube 302 and the plurality of spray holes 303; when there is less dust around the drill rod 20, there is less dust blocked at the bottom of the partition 603, so the dust cannot cause the blockage of the partition 603, and thus cannot affect the smooth passage of the air through the partition 603, so that Therefore, the up-and-down movement of the auxiliary piston rod 50 along the inside of the first channel 103 can only pump air; on the contrary, if there is a lot of dust around the drill rod 20 and a lot of dust is blocked at the bottom of the partition net 603, the more dust will block the partition net 603, resulting in the subsequent air being unable to pass through the partition net 603. At this time, as the auxiliary piston rod 50 moves upward along the inside of the first channel 103, the auxiliary piston rod 50 pulls the detection tube 601 so that the detection tube 601 moves upward along the inside of the first channel 103, thereby driving the water inlet hole 602 to move upward, so that the water inlet hole 602 is connected to the water inlet pipe 102 accordingly. During the process, the auxiliary piston rod 50 draws water from the external water tank into the detection tube 601 through the water inlet pipe 102 and the water inlet hole 602, and then presses the water inside the detection tube 601 into the support tube 301 through the first channel 103, and finally presses the water out through the plurality of spray holes 303 at the bottom of the annular tube 302 to settle the dust around the drill rod 20; when the water is pressed from the inside of the detection tube 601 to the inside of the first channel 103, the water can pass through the partition net 603 in the reverse direction, and then clean the dust at the bottom of the partition net 603, and the cleaned dust is pressed out from the spray holes 303 along with the water.

[0020] See also Figure 2, in one embodiment, a check valve assembly 80 is further disposed inside the hammer body 10. When the detection tube 601 moves upward along the inside of the first channel 103 and the water inlet pipe 102 communicates with the water inlet hole 602, the check valve assembly 80 is configured to cooperate with the upward movement of the auxiliary piston rod 50 to perform a one-way closing of the first channel 103, so that when the auxiliary piston rod 50 moves upward along the inside of the first channel 103, the water source in the external water tank can be smoothly extracted into the detection tube 601 via the water inlet pipe 102 and the water inlet hole 602. At the same time, when the auxiliary piston rod 50 moves downward along the inside of the first channel 103, the water source in the detection tube 601 can be smoothly pressed into the annular tube 302 via the first channel 103 and the support tube 301, so that the water source is smoothly ejected from a plurality of spray holes 303 at the bottom of the annular tube 302.

[0021] Please refer to Figure 4 , in one embodiment, a second notch 105 is formed on one side of the first channel 103 inside the hammer body 10. The check valve assembly 80 includes an annular plate 801, a check valve 802, and a second elastic member 804. The annular plate 801 is movably disposed inside the second notch 105. One end of the second elastic member 804 is connected to the annular plate 801, and the other end is connected to the inner wall of the second notch 105 for providing elastic support to the annular plate 801. The check valve 802 is disposed inside the annular plate 801.

[0022] When there is less dust around the drill rod 20, resulting in less dust blocked at the bottom of the partition net 603, since the upward movement of the auxiliary piston rod 50 inside the first channel 103 cannot pull the detection tube 601, the detection tube 601 cannot move upward inside the first channel 103. At this time, the auxiliary piston rod 50 only performs the action of pumping air, and the detection tube 601 remains stationary or moves upward a very short distance inside the first channel 103, resulting in the water inlet pipe 102 being unable to communicate with the water inlet hole 602. The entire ring plate 801 is located inside the second notch 105, and the ring plate 801 abuts against the outer wall of the detection tube 601 under the support of the second elastic member 804; when there is more dust around the drill rod 20, resulting in more dust blocked at the bottom of the partition net 603, thus causing the partition net 603 to be blocked, the upward movement of the auxiliary piston rod 50 inside the first channel 103 can pull the detection tube 601 to move upward inside the first channel 103. When the water inlet hole 602 on the side wall of the detection tube 601 corresponds and communicates with the water inlet pipe 102, the lower end of the detection tube 601 moves above the ring plate 801. At this time, the second elastic member 804 pushes the ring plate 801, causing the ring plate 801 and the one-way valve 802 inside it to extend into the first channel 103 together. The ring plate 801 acts on the bottom of the detection tube 601 to provide support for the detection tube 601. After that, as the auxiliary piston rod 50 moves up and down inside the first channel 103, when the auxiliary piston rod 50 moves upward, the check valve inside the water inlet pipe 102 opens, and the one-way valve 802 inside the ring plate 801 closes. The auxiliary piston rod 50 extracts the water source from the external water tank through the water inlet pipe 102 and the water inlet hole 602 into the detection tube 601. When the auxiliary piston rod 50 moves downward, the check valve inside the water inlet pipe 102 closes, and the one-way valve 802 inside the ring plate 801 opens. The auxiliary piston rod 50 presses the water source inside the detection tube 601 into the first channel 103, then is pressed into the ring tube 302 by the support tube 301, and finally sprays out through a number of spray holes 303 to achieve the sedimentation of dust.

[0023] Please refer to Figure 2 and Figure 3 , in one embodiment, a reset assembly 70 is further provided inside the hammer body 10. After the drill rod 20 finishes the crushing operation, the reset assembly 70 is used to drive the detection tube 601 to move downward inside the first channel 103 to realize the reset of the detection tube 601.

[0024] Please refer to Figure 2 , Figure 3 and Figure 4, in one embodiment, the reset assembly 70 includes an annular stopper 701 and a first elastic member 702. The annular stopper 701 is fixedly disposed inside the first channel 103. One end of the first elastic member 702 is connected to the annular stopper 701, and the other end is connected to the detection tube 601 for providing elastic support to the detection tube 601. A pull rod 803 is also fixedly disposed on the side wall of the ring plate 801, and the end of the pull rod 803 away from the ring plate 801 extends outside the hammer body 10.

[0025] After the breaker rod 20 finishes the crushing operation, the staff can pull the pull rod 803, thereby driving the ring plate 801 to move reversely to the inside of the second notch 105. The ring plate 801 and the one-way valve 802 are removed from the lower end of the detection tube 601. Subsequently, the first elastic member 702 can push the detection tube 601 to move the detection tube 601 downward along the inside of the first channel 103 to realize the reset of the detection tube 601.

[0026] In one embodiment, the first elastic member 702 and the second elastic member 804 can be springs or metal elastic sheets, and there is no limitation here.

[0027] In the embodiment of the present invention, when a crushing operation needs to be performed, the hydraulic system is used to control the main piston rod 40 to reciprocate up and down along the inside of the second channel 101, and then repeatedly impact the breaker rod 20. The breaker rod 20 transmits the impact force to the wall or ground to be broken, thereby realizing the breaking of the wall or ground. When the main piston rod 40 reciprocates up and down along the inside of the second channel 101, the main piston rod 40 can also drive the auxiliary piston rod 50 to reciprocate up and down along the inside of the first channel 103. At the same time, the dust detection assembly 60 is used to detect the dust raised around the breaker rod 20. When the dust detection assembly 60 detects that the raised dust is less, the auxiliary piston rod 50 only performs the action of pumping air instead of pumping water source; when the dust detection assembly 60 detects that the raised dust is more, the auxiliary piston rod 50 performs the action of pumping water source and presses the water source out through the spraying assembly 30. After the water source is pressed out, it acts on the dust raised around the breaker rod 20, thereby performing sedimentation treatment on the dust to avoid blocking the sight of the wall or ground around the breaker rod 20 due to the existence of excessive dust, so that the staff can smoothly perform the crushing operation. Compared with the prior art, when the breaker rod 20 performs the crushing operation, not only can dust sedimentation be performed, but also whether to perform dust reduction can be selected according to the dust amount around the breaker rod 20, thereby avoiding meaningless dust reduction operations when the dust amount around the breaker rod 20 is less and realizing the conservation of water resources.

[0028] The above has described the preferred embodiments of the present invention in detail, but the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present invention.

Claims

1. A hydraulic breaker with a dust reduction function, comprising a hammer body (10) and a drill rod (20). A second channel (101) is provided inside the hammer body (10). One end of the drill rod (20) extends into the second channel (101), and the other end extends to the bottom of the hammer body (10). It is characterized in that, It further includes a spray component (30), a main piston rod (40), a sub-piston rod (50), and a dust detection component (60); A first channel (103) is further formed inside the hammer body (10). The main piston rod (40) is arranged inside the second channel (101) and is controlled by a hydraulic system to reciprocate up and down inside the second channel (101); The sub-piston rod (50) is arranged inside the first channel (103) and is controlled by the main piston rod (40) to reciprocate up and down inside the first channel (103); The spray component (30) is installed at the bottom of the hammer body (10), and the dust detection component (60) is arranged inside the first channel (103). When the drill rod (20) performs a crushing operation, the dust detection component (60) is used to detect the dust around the drill rod (20); When the dust detection component (60) detects less dust, the sub-piston rod (50) performs an air pumping action. When the dust detection component (60) detects more dust, the sub-piston rod (50) performs a water pumping action to press out the water source through the spray component (30) to achieve dust settlement.

2. The hydraulic breaker with a dust reduction function according to claim 1, wherein A water inlet pipe (102) is arranged on the side wall of the hammer body (10). One end of the water inlet pipe (102) is connected to an external water tank, and the other end is communicated with the first channel (103). A first notch (104) for communicating the first channel (103) with the second channel (101) is formed inside the hammer body (10). A connecting rod (501) is fixedly arranged on the side wall of the sub-piston rod (50). The end of the connecting rod (501) away from the sub-piston rod (50) extends into the second channel (101) from the first notch (104) and is fixedly connected to the main piston rod (40); The spray component (30) includes a support pipe (301) and an annular pipe (302). One end of the support pipe (301) is fixedly connected to the bottom wall of the hammer body (10) and is communicated with the first channel (103), and the other end is communicated with the annular pipe (302). The annular pipe (302) is arranged around the outside of the drill rod (20), and a plurality of spray holes (303) are formed at the bottom of the annular pipe (302) at intervals; The dust detection component (60) includes a detection pipe (601) and a partition net (603) fixedly arranged inside the detection pipe (601). The detection pipe (601) is movably arranged inside the first channel (103). A water inlet hole (602) corresponding to the water inlet pipe (102) is formed on the side wall of the detection pipe (601), and a check valve is arranged inside the water inlet pipe (102).

3. The hydraulic breaker with a dust reduction function according to claim 2, characterized in that, A one-way valve assembly (80) is further provided inside the hammer body (10). When the detection tube (601) moves upward along the inside of the first channel (103) and the water inlet pipe (102) communicates with the water inlet hole (602), the one-way valve assembly (80) is used to cooperate with the upward movement of the auxiliary piston rod (50) to close the first channel (103) unidirectionally.

4. A hydraulic breaker with a dust reduction function according to claim 3, characterized in that, A second notch (105) is formed on one side of the first channel (103) inside the hammer body (10); The one-way valve assembly (80) includes an annular plate (801), a one-way valve (802), and a second elastic member (804). The annular plate (801) is movably arranged inside the second notch (105). One end of the second elastic member (804) is connected to the annular plate (801), and the other end is connected to the inner wall of the second notch (105) for providing elastic support to the annular plate (801). The one-way valve (802) is arranged inside the annular plate (801).

5. A hydraulic breaker with a dust reduction function according to claim 4, characterized in that, A reset assembly (70) is further provided inside the hammer body (10). After the breaker rod (20) finishes the crushing operation, the reset assembly (70) is used to drive the detection tube (601) to move downward along the inside of the first channel (103) to realize the reset of the detection tube (601).

6. The hydraulic breaker with a dust reduction function according to claim 5, characterized in that, The reset assembly (70) includes an annular stopper (701) and a first elastic member (702). The annular stopper (701) is fixedly arranged inside the first channel (103). One end of the first elastic member (702) is connected to the annular stopper (701), and the other end is connected to the detection tube (601) for providing elastic support to the detection tube (601). A pull rod (803) is also fixedly arranged on the side wall of the annular plate (801). The end of the pull rod (803) away from the annular plate (801) extends outside the hammer body (10).

7. The hydraulic breaker with a dust reduction function according to claim 6, characterized in that, The first elastic member (702) and the second elastic member (804) are springs or metal shrapnel.

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