Network security device based on Internet of Things

Abstract

The invention discloses a network security device based on Internet of Things, which structurally comprises a security device, a connecting mechanism, a closed box and a power interface, the power interface is installed on the side surface of the closed box, the connecting mechanism is embedded and fixed on the side surface of the security device, and the lower end of the closed box is mutually clamped and connected with the upper end of the security device. When the connector enters the hollow groove, a stress plate in the blocking mechanism is extruded, so that blocking plates on the upper side and the lower side are in contact and fit with each other under the elastic force of a first spring, dust is blocked in the blocking plates, dust is prevented from entering through a gap and entering the line connection position of the connector, and the service life of the connector is prolonged. When external dust passes through the gap plate and then moves towards the collecting structure, the dust is clamped in the gap strip on the surface of the gap strip, the dust is prevented from moving towards the side face and entering the interior through the triangular groove, and the dust is prevented from entering the interior of the machine shell under the current magnetism to cover the interior of the machine shell. And the influence of dust on data circulation of the control panel is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of network security devices, and more specifically, to a network security device based on the Internet of Things. Background Art

[0002] The network security device erects a security barrier between the Internet of Things and the computer. The function of this barrier is to block threats and intrusions from the outside to the network through the network. The network security device can provide timely warnings for network intrusions, monitor the data flow of the Internet of Things, and prevent unauthorized access and unsafe networks from entering the computer, thereby achieving security protection for the network.

[0003] However, network security requires connection to the network, and its network connector is snap-connected with the interface position of the security device. There is a gap between the connector and the interface, and dust can easily enter the line contact position of the connector from the gap, which can easily affect the stability of the network. In addition, various circuit boards are arranged inside the existing network security devices. The internal circuit boards will generate a certain amount of heat when they are consolidated, so the internal heat dissipation is required. The existing method uses a fan to blow internal air circulation for heat dissipation. When the heat dissipation is stopped, the holes generated at the side heat dissipation plate position are easily allowed to be entered by external dust, and then magnetic adsorption is generated under the internal current to cover the dust inside, affecting the smoothness of the circuit flow. Summary of the invention

[0004] The technical solution adopted by the present invention to achieve the technical purpose is: a network security device based on the Internet of Things, whose structure includes a safety device, a connecting mechanism, a closing box, and a power interface. The power interface is installed on the side of the closing box, the connecting mechanism is embedded in the side of the safety device, the lower end of the closing box and the upper end of the safety device are mutually engaged and connected, the connecting mechanism is provided with a line pole, a blocking mechanism, a circuit board, a hollow groove, an interface board, and an extrusion rod. The line pole is embedded in the interface board, the blocking mechanism and the interface board are located at the same central axis position, the circuit board is embedded in the inner end of the line pole, the hollow groove is located on the side of the interface board, the blocking mechanism is embedded on the left side of the safety device, the interface board is installed on the right side of the safety device, the extrusion rod is movably engaged in the safety device, the outer end of the line pole is connected to the internal circuit of the safety device, the hollow groove is located in the safety device and the position above the hollow groove is slightly larger than the interface board, and the circuit board is in contact with the connector circuit.

[0005] As a further improvement of the present invention, the blocking mechanism is provided with a support plate, an elastic plate, a force-bearing plate, and a limiting groove. The elastic plate is attached to the inner side of the support plate, the force-bearing plate is embedded in the side of the elastic plate, the limiting groove is located on the side of the force-bearing plate, the support plate is embedded in the outer side of the safety device, the elastic plate is made of rubber, has the characteristics of deformation and activity, and the elastic plate has a rebound force that can be reset.

[0006] As a further improvement of the present invention, the force-bearing plate is provided with an arc groove, a blocking plate, an inclined plate, a first spring, a horizontal plate, and a sliding plate. The arc groove is located on the inner side of the inclined plate, the first spring is embedded in the side of the horizontal plate, the inclined plate is welded to the outer end of the horizontal plate, the blocking plate is attached to the side of the horizontal plate, the sliding plate is embedded on the left and right sides of the blocking plate, the first spring is engaged inside the blocking plate, the horizontal plate is embedded in the side of the elastic plate, the sliding plate is made of sponge material and has the characteristic of easy compression deformation, the sliding plate occupies two-thirds of the height of the blocking plate, and the surface of the sliding plate is relatively smooth, and the inclined plate is tilted outward at 60 degrees.

[0007] As a further improvement of the present invention, the extrusion rod is provided with a circular rod, a force block, a fixed plate, and a second spring. The second spring is embedded in the upper end of the fixed plate, the circular rod runs through the interior of the fixed plate, the upper end of the second spring is installed on the lower end of the force block, the upper end of the circular rod is embedded in the lower end of the force block, the fixed plate is embedded in the safety device, and a ball is provided on the side of the force block, which slides with the track inside the safety device, thereby making the force block vertically limit movable.

[0008] As a further improvement of the present invention, the safety device is provided with a collecting structure, a fan, a gap plate, a control panel, and a casing; the gap plate is embedded in the outer side of the casing, the collecting structure is installed on the upper and lower sides of the casing, the control panel is installed at the bottom of the casing, the fan is embedded in the bottom of the casing, the fan is connected to the control panel circuit, the connecting mechanism is embedded on the outer side of the casing, the lower end of the closing box and the casing are mutually engaged and connected, the control panel is connected to the power interface position circuit, the control panel is connected to the internal circuit of the closing box, the control panel is connected to the line pole circuit, and the gap of the gap plate is large, which can prevent larger impurities from entering.

[0009] As a further improvement of the present invention, the collecting structure is provided with a first inclined rod, a gap bar, a triangular groove, and a second inclined rod. The gap bar is attached to the side surfaces of the first inclined rod and the second inclined rod, the triangular groove is located at the intersection of the first inclined rod and the second inclined rod, the side surfaces of the first inclined rod and the second inclined rod are embedded with each other, the first inclined rod and the second inclined rod are installed on the upper and lower sides inside the casing, the gap bar is made of sponge material, has the characteristics of low density and large gap, and has the effect of absorbing dust, the first inclined rod and the second inclined rod are staggered, and the first inclined rod and the second inclined rod are crossed with each other at a tilted state of 28 degrees. Beneficial Effects

[0010] 1. In the present invention, the connector squeezes the blocking mechanism into the hollow groove, so that the lower end of the connector is in contact with the circuit board, and then the network data is transmitted to the inside of the safety device through the line pole. At the same time, the connector is engaged in the safety device position, and the connector is sealed to the outside through the blocking mechanism to prevent external dust from entering the hollow groove and reaching the connection of the circuit board. The blocking mechanism prevents the connector from being pressed and released, so that the connector is released from the engagement on the inside of the safety device, and then the connector line is pulled to squeeze the blocking mechanism. Then, under the blocking of the blocking mechanism, dust is prevented from entering the circuit board position from the connector gap, and dust is prevented from affecting the network data connection.

[0011] 2. In the present invention, when the joint enters the hollow groove, it squeezes the force-bearing plate in the blocking mechanism, so that the edge of the joint straightly squeezes the side of the inclined plate, causing the horizontal plate to expand outward, and then the joint is reset after passing through the horizontal plate, so that the first spring drives the blocking plate to return to the center, so that under the elastic force of the first spring, the blocking plates on the upper and lower sides contact and fit each other, so that a closed barrier is formed on the outside of the first spring joint, and dust is blocked inside the blocking plate to prevent dust from entering through the gap, and to prevent dust from entering the line connection of the joint, so as to avoid affecting the transmission stability of the joint to the network.

[0012] 3. In the present invention, when external dust moves toward the collecting structure after passing through the gap plate, the dust moves linearly on one side of the triangular groove and the second inclined rod, and then under the guidance of the inclination angles of the first inclined rod and the second inclined rod, the dust will form an upward or downward guiding force, thereby causing the dust to roll up and down on the surface of the gap bar until it is engaged in the gap bar to block it, preventing the dust from moving sideways through the triangular groove into the interior, preventing the dust from entering the casing and covering it under the magnetic current, and preventing the dust from affecting the data flow of the control board. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention is a schematic structural diagram of a network security device based on the Internet of Things.

[0014] Figure 2 The figure is a schematic diagram of the side structure of a connecting mechanism of the present invention.

[0015] Figure 3 The figure is a schematic diagram of the planar structure of a blocking mechanism of the present invention.

[0016] Figure 4 It is a schematic diagram of the three-dimensional structure of a load-bearing plate of the present invention.

[0017] Figure 5 The figure is a schematic diagram of the side structure of an extrusion rod of the present invention.

[0018] Figure 6 The figure is a schematic diagram of the side structure of a safety device of the present invention.

[0019] Figure 7 This is a schematic diagram of the three-dimensional structure of a collecting structure of the present invention.

[0020] In the figure: safety device-1, connecting mechanism-2, closing box-3, power interface-4, line pole-21, blocking mechanism-22, circuit board-23, hollow groove-24, interface plate-25, extrusion rod-26, support plate-w1, elastic plate-w2, force plate-w3, limit groove-w4, arc groove-w31, blocking plate-w32, inclined plate-w33, first spring-w34, horizontal plate-w35, sliding plate-w36, circular rod-t1, force block-t2, fixed plate-t3, second spring-t4, collecting structure-s1, fan-s2, gap plate-s3, control board-s4, casing-s5, first inclined rod-s11, gap bar-s12, triangular groove-s13, second inclined rod-s14. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings: Example

[0022] As attached Figure 1 To Attachment Figure 5 As shown: The present invention discloses a network security device based on the Internet of Things, which structure includes a security device 1, a connecting mechanism 2, a closing box 3, and a power interface 4. The power interface 4 is installed on the side of the closing box 3, the connecting mechanism 2 is embedded in the side of the security device 1, the lower end of the closing box 3 and the upper end of the security device 1 are mutually engaged and connected, the connecting mechanism 2 is provided with a line pole 21, a blocking mechanism 22, a circuit board 23, a hollow groove 24, an interface board 25, and an extrusion rod 26, the line pole 21 is embedded in the interface board 25, the blocking mechanism 22 and the interface board 25 are located at the same central axis position, the circuit board 23 is embedded in the inner end of the line pole 21, the hollow groove 24 is located on the side of the interface board 25, the blocking mechanism 22 is embedded in the left side of the security device 1, the interface board 25 is installed on the right side of the security device 1, the extrusion rod 26 is movably engaged in the security device 1, and the line pole The outer end of 21 is connected to the internal circuit of the safety device 1, the hollow groove 24 is located inside the safety device 1 and the position above the hollow groove 24 is slightly larger than the interface board 25, the circuit board 23 is in contact with the connector circuit, so that the connector squeezes the blocking mechanism 22 to enter the hollow groove 24, so that the lower end of the connector is in contact with the circuit board 23, and then the network data is transmitted to the inside of the safety device 1 through the line rod 21, and at the same time the connector is engaged in the position of the safety device 1, the connector is sealed to the outside through the blocking mechanism 22 to prevent external dust from entering the hollow groove 24 and reaching the connection of the circuit board 23, and when the connector is released, the squeezing rod 26 is pressed to release the connector from the inner side of the safety device 1, and then the connector circuit is pulled to squeeze the blocking mechanism 22, and then under the blocking of the blocking mechanism 22, dust is prevented from entering the circuit board 23 position from the connector gap, and dust is prevented from affecting the network data connection.

[0023] Among them, the blocking mechanism 22 is provided with a support plate w1, an elastic plate w2, a force plate w3, and a limiting groove w4. The elastic plate w2 is attached to the inner side of the support plate w1, the force plate w3 is embedded in the side of the elastic plate w2, and the limiting groove w4 is located at the side position of the force plate w3. The support plate w1 is embedded in the outer side of the safety device 1. The elastic plate w2 is made of rubber and has the characteristic of deformation and movement. The elastic plate w2 has a rebound force that can be reset, so that the joint squeezes the force plate w3, so that the force plates w3 on the upper and lower sides are squeezed outward under the elastic force of the elastic plate w2, and then the joint enters the hollow groove 24. The line of the joint is limited at the position of the limiting groove w4, so that the force plate w3 is reset again under the elastic force of the elastic plate w2, so that the force plates w3 squeeze and wrap the upper and lower sides of the joint to prevent external dust from entering the hollow groove 24 through the gap of the joint.

[0024] Among them, the force-bearing plate w3 is provided with an arc groove w31, a blocking plate w32, an inclined plate w33, a first spring w34, a horizontal plate w35, and a sliding plate w36. The arc groove w31 is located on the inner side of the inclined plate w33, the first spring w34 is embedded in the side of the horizontal plate w35, the inclined plate w33 is welded to the outer end of the horizontal plate w35, the blocking plate w32 is attached to the side of the horizontal plate w35, the sliding plate w36 is embedded on the left and right sides of the blocking plate w32, the first spring w34 is engaged in the inside of the blocking plate w32, the horizontal plate w35 is embedded in the side of the elastic plate w2, the sliding plate w36 is made of sponge material and has the characteristic of easy compression deformation, the sliding plate w36 occupies two-thirds of the height of the blocking plate w32, and the surface of the sliding plate w36 is relatively smooth, the inclined plate w33 is tilted outward at 60 degrees, so that the edge of the joint linearly squeezes the side of the inclined plate w33, causing the horizontal plate w35 to expand outward, and then the front end of the joint pushes and bends the sliding plate w36, and under the guidance of the sliding plate w36, squeezes the blocking plate w32, driving the first spring w34 to bend and move, so that the joint slides through the sliding plate w36, and is limited at the position of the arc groove w31 through the rear joint line, and then the joint is reset through the rear horizontal plate w35, so that the first spring w34 drives the blocking plate w32 to return to the center, so that under the elastic force of the first spring w34, the blocking plates w32 on the upper and lower sides contact and fit each other, so that the outside of the first spring w34 joint forms a closed barrier, and dust is blocked inside the blocking plate w32 to prevent dust from entering through the gap and preventing dust from entering the line connection of the joint.

[0025] Among them, the extrusion rod 26 is provided with a circular rod t1, a force block t2, a fixing plate t3, and a second spring t4, the second spring t4 is embedded in the upper end of the fixing plate t3, the circular rod t1 runs through the fixing plate t3, the upper end of the second spring t4 is installed at the lower end of the force block t2, the upper end of the circular rod t1 is embedded in the lower end of the force block t2, the fixing plate t3 is embedded in the safety device 1, and the side of the force block t2 is provided with a ball, which slides with the track inside the safety device 1, and has the effect of making the force block t2 vertically limited and movable, so that the force block t2 is manually pressed downward, and the circular rod t1 is driven to be squeezed downward inside the fixing plate t3, thereby squeezing the clamping block of the joint, so that the joint is released from the contact connection with the circuit board 23, and then the force block t2 is reset upward under the elastic force of the second spring t4, and after the joint is released, the joint line is pulled to move out of the hollow groove 24, so as to achieve the effect of pressing and releasing the sealed joint, and prevent the blocking mechanism 22 from blocking the joint from being pressed and released. The specific usage and function of this embodiment are as follows: In the present invention, the connector squeezes and blocks the mechanism 22 to enter the hollow groove 24, so that the lower end of the connector is in contact with the circuit board 23, and then the network data is transmitted to the inside of the safety device 1 through the line rod 21. At the same time, the connector is engaged in the position of the safety device 1, and the connector forms a sealed state to the outside through the blocking mechanism 22 to prevent external dust from entering the hollow groove 24 and reaching the connection of the circuit board 23. When the connector is released, the force block t2 is manually pressed downward to drive the circular rod t1 to squeeze downward inside the fixing plate t3, thereby squeezing the engaging block of the connector to make The connector releases its contact with the circuit board 23, and then the force block t2 is reset upward under the elastic force of the second spring t4. After the connector is released, the connector line is pulled to move out of the hollow groove 24, thereby achieving the effect of pressing and releasing the sealed connector, and preventing the blocking mechanism 22 from blocking the connector from being pressed and released, so that the connector is released from the engagement on the inner side of the safety device 1, and then the connector line is pulled to squeeze the blocking mechanism 22, and then under the blocking of the blocking mechanism 22, dust is prevented from entering the circuit board 23 position from the connector gap, thereby preventing dust from affecting the network data connection.

[0026] In the present invention, when the joint enters the hollow groove 24, it squeezes the force-bearing plate w3 in the blocking mechanism 22, so that the edge of the joint straightly squeezes the side of the inclined plate w33, and the horizontal plate w35 expands outward, so that the force-bearing plates w3 on the upper and lower sides are squeezed outward under the elastic force of the elastic plate w2, and then the front end of the joint pushes the sliding plate w36 to bend, and under the guidance of the sliding plate w36, it squeezes the blocking plate w32, driving the first spring w34 to bend and move, so that the joint slides through the sliding plate w36, and is limited at the position of the arc groove w31 through the rear joint line, and then the joint is reset through the rear horizontal plate w35, so that the first spring w34 drives the blocking plate w32 to return to the center, so that under the elastic force of the first spring w34, the blocking plates w32 on the upper and lower sides contact and fit each other, so that the outer side of the first spring w34 joint forms a closed barrier, and dust is blocked inside the blocking plate w32, so that dust is prevented from entering through the gap, and dust is prevented from entering the line connection of the joint, so as to avoid affecting the transmission stability of the joint to the network. Example

[0027] As attached Figure 6 To Attachment Figure 7 As shown: The safety device 1 is provided with a collecting structure s1, a fan s2, a gap plate s3, a control board s4, and a casing s5. The gap plate s3 is embedded in the inside and outside of the casing s5, the collecting structure s1 is installed on the upper and lower sides of the casing s5, the control board s4 is installed at the bottom of the casing s5, the fan s2 is embedded in the bottom of the casing s5, the fan s2 is connected to the control board s4 by line, the connecting mechanism 2 is embedded in the outside of the casing s5, the lower end of the closing box 3 is connected to the casing s5 by mutual engagement, the control board s4 is connected to the power interface 4 by line, and the control board s 4 is connected to the internal circuit of the closed box 3, the control board s4 is connected to the circuit of the line pole 21, the gap of the gap plate s3 is large, which can block the entry of larger impurities, so that the circuit is connected through the power interface 4, so that after the control board s4 is powered on, the fan s2 is controlled to generate wind force, and then the wind force fills the inside of the casing s5, so that the heat inside the casing s5 is discharged to the collecting structure s1 and the gap plate s3 on the left and right sides, and when the dust passes through the gap plate s3, it is blocked in the collecting structure s1 to avoid the dust from entering the inside of the casing s5 under the magnetic current, so as to prevent the dust from affecting the data flow of the control board s4.

[0028] The collecting structure s1 is provided with a first tilting rod s11, a gap bar s12, a triangular groove s13, and a second tilting rod s14. The gap bar s12 is attached to the side surfaces of the first tilting rod s11 and the second tilting rod s14. The triangular groove s13 is located at the intersection of the first tilting rod s11 and the second tilting rod s14. The side surfaces of the first tilting rod s11 and the second tilting rod s14 are mutually embedded. The first tilting rod s11 and the second tilting rod s14 are installed on the upper and lower sides of the casing s5. The gap bar s12 is made of sponge material, has the characteristics of low density and large gap, and has the effect of absorbing dust. The first tilting rod s11 and the second tilting rod s14 are staggered. , and the first inclined rod s11 and the second inclined rod s14 are inclined at 28 degrees and cross each other, so that the triangular groove s13 circulates air, and its position is between the intersecting sides of the second inclined rod s14 and the first inclined rod s11, and the external dust moves toward the collecting structure s1 after passing through the gap plate s3, and the dust moves in a straight line on one side of the triangular groove s13 and the second inclined rod s14, and then under the guidance of the inclination angles of the first inclined rod s11 and the second inclined rod s14, the dust will form an upward or downward guiding force, thereby causing the dust to roll up and down on the surface of the gap bar s12 until it is engaged in the gap bar s12 to block it, preventing the dust from moving sideways through the triangular groove s13 and entering the interior. The specific usage and function of this embodiment are as follows: In the present invention, the circuit is connected through the power interface 4, so that the control board s4 is powered on to control the fan s2 to generate wind, and then the wind fills the inside of the casing s5, so that the heat inside the casing s5 is discharged to the collection structure s1 and the gap plate s3 on the left and right sides, and when the dust passes through the gap plate s3, it is blocked in the collection structure s1, so that the triangular groove s13 circulates the air, and its position is located between the intersection side of the second inclined rod s14 and the first inclined rod s11, and the external dust passes through the gap plate s3 and goes to the collection structure s1 When moving, the dust moves in a straight line on one side of the triangular groove s13 and the second inclined rod s14, and then under the guidance of the inclination angles of the first inclined rod s11 and the second inclined rod s14, the dust will form an upward or downward guiding force, so that the dust rolls up and down on the surface of the gap bar s12 until it is engaged in the gap bar s12 to block it, preventing the dust from moving sideways through the triangular groove s13 and entering the interior, avoiding the dust from entering the interior of the casing s5 and covering it under the magnetic current, and preventing the dust from affecting the data flow of the control board s4. Utilizing the technical solution of the present invention, or those skilled in the art designing similar technical solutions inspired by the technical solution of the present invention to achieve the above-mentioned technical effects, all fall within the protection scope of the present invention.

Claims

1. A network security device based on the Internet of Things, the structure of which comprises a security device (1), a connecting mechanism (2), a closing box (3), and a power interface (4), characterized in that: The power interface (4) is mounted on a side of the closed box (3), the connection mechanism (2) is embedded in a side of the safety device (1), and the lower end of the closed box (3) and the upper end of the safety device (1) are mutually engaged and connected; The connecting mechanism (2) is provided with a line pole (21), a blocking mechanism (22), a circuit board (23), a hollow groove (24), an interface board (25), and an extrusion rod (26); the line pole (21) is embedded in the interface board (25); the blocking mechanism (22) and the interface board (25) are located at the same central axis position; the circuit board (23) is embedded in the inner end of the line pole (21); the hollow groove (24) is located on the side of the interface board (25); the blocking mechanism (22) is embedded in the left side of the safety device (1); the interface board (25) is installed on the right side of the safety device (1); the extrusion rod (26) is movably engaged in the safety device (1); and the outer end of the line pole (21) is connected to the internal circuit of the safety device (1).

2. A network security device based on the Internet of Things according to claim 1, characterized in that: The blocking mechanism (22) is provided with a support plate (w1), an elastic plate (w2), a force-bearing plate (w3), and a limiting groove (w4); the elastic plate (w2) is fitted on the inner side of the support plate (w1); the force-bearing plate (w3) is embedded in the side of the elastic plate (w2); the limiting groove (w4) is located on the side of the force-bearing plate (w3); and the support plate (w1) is embedded in the outer side of the safety device (1).

3. A network security device based on the Internet of Things according to claim 2, characterized in that: The force-bearing plate (w3) is provided with an arc groove (w31), a blocking plate (w32), an inclined plate (w33), a first spring (w34), a horizontal plate (w35), and a sliding plate (w36); the arc groove (w31) is located on the inner side of the inclined plate (w33); the first spring (w34) is embedded in the side of the horizontal plate (w35); the inclined plate (w33) is welded to the outer end of the horizontal plate (w35); the blocking plate (w32) is attached to the side of the horizontal plate (w35); the sliding plate (w36) is embedded on the left and right sides of the blocking plate (w32); the first spring (w34) is engaged in the inside of the blocking plate (w32); and the horizontal plate (w35) is embedded in the side of the elastic plate (w2).

4. The network security device based on the Internet of Things according to claim 1, characterized in that: The extrusion rod (26) is provided with a circular rod (t1), a force block (t2), a fixing plate (t3), and a second spring (t4); the second spring (t4) is embedded in the upper end of the fixing plate (t3); the circular rod (t1) passes through the interior of the fixing plate (t3); the upper end of the second spring (t4) is mounted on the lower end of the force block (t2); the upper end of the circular rod (t1) is embedded in the lower end of the force block (t2); and the fixing plate (t3) is embedded in the interior of the safety device (1).

5. The network security device based on the Internet of Things according to claim 1, characterized in that: The safety device (1) is provided with a collecting structure (s1), a fan (s2), a gap plate (s3), a control board (s4), and a casing (s5); the gap plate (s3) is embedded inside and outside the casing (s5); the collecting structure (s1) is installed on the upper and lower sides of the casing (s5); the control board (s4) is installed at the bottom of the casing (s5); the fan (s2) is embedded at the bottom of the casing (s5); the fan (s2) and the control board (s4) are connected by circuit; the connecting mechanism (2) is embedded outside the casing (s5); and the lower end of the closing box (3) is mutually engaged and connected with the casing (s5).

6. A network security device based on the Internet of Things according to claim 5, characterized in that: The collecting structure (s1) is provided with a first tilting rod (s11), a gap bar (s12), a triangular groove (s13), and a second tilting rod (s14); the gap bar (s12) is attached to the side surfaces of the first tilting rod (s11) and the second tilting rod (s14); the triangular groove (s13) is located at the intersection of the first tilting rod (s11) and the second tilting rod (s14); the side surfaces of the first tilting rod (s11) and the second tilting rod (s14) are embedded with each other; and the first tilting rod (s11) and the second tilting rod (s14) are installed on the upper and lower sides inside the casing (s5).

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