A handheld terminal for preventing electromagnetic interference

Abstract

The present invention relates to the technical field of handheld terminals, and discloses a handheld terminal for preventing electromagnetic interference, comprising a shell, an inner wall at the top of the shell being slidably connected with a protective cover, front and rear sides of the protective cover being fixedly connected with sliders, an inner wall of the shell being provided with a code scanning transmission terminal, and a handle being installed at the front of the shell; an inner wall of the shell being provided with a grounding device, inner walls at the front and rear of the shell being provided with supporting devices, an inner wall of the shell being provided with a winding device, and an inner wall of the shell being provided with a sealing device. When the present invention is used, a knob is opened and a tool and a grounding column in the shell are taken out, and then the grounding column is driven into the ground, so that the device can be grounded, thereby preventing the device from electromagnetic interference, ensuring that the terminal can receive and transmit communication information in some areas with electromagnetic interference, and improving the application scope of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of handheld terminals, and in particular to a handheld terminal capable of preventing electromagnetic interference. Background Art

[0002] A handheld transmission terminal generally refers to a portable electronic device that can be used for data collection, processing and transmission, and is usually used in commercial and industrial fields.

[0003] When users sell goods outdoors, they usually carry a handheld code scanning transmission terminal with them, which is used for customers to scan the code to pay after the goods are sold. After the payment is completed, the transmission terminal will transmit the customer's payment information to the user's mobile phone. However, there are some places with electromagnetic interference outdoors, which may easily cause the transmission terminal to have difficulty in transmitting payment information, affecting the normal use of the code scanning transmission terminal. Therefore, an anti-electromagnetic interference handheld terminal is proposed to solve the above-mentioned problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a handheld terminal that is resistant to electromagnetic interference in view of the deficiencies in the above-mentioned prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an electromagnetic interference-proof handheld terminal, comprising a shell, a protective cover is slidably connected to the inner wall of the top of the shell, sliders are fixedly connected to the front and rear sides of the protective cover, a code scanning transmission terminal is arranged on the inner wall of the shell, and a handle is installed on the front of the shell; a grounding device is arranged on the inner wall of the shell, a supporting device is arranged on the inner walls of the front and rear of the shell, a winding device is arranged on the inner wall of the shell, a sealing device is arranged on the inner wall of the shell, and an ejection device is arranged on the bottom of the code scanning transmission terminal; the grounding device comprises a knob, a tool, a grounding column and a wire, and the knob is threadedly connected On the inner wall on the left side of the shell, the tool is placed on the inner wall of the shell, the grounding column is slidably connected to the inner wall of the shell, and the wire is fixedly connected to the right end of the grounding column; the supporting device includes a bidirectional screw, a moving block, a support rod, a fixed rod, a baffle and a slide plate, the bidirectional screw is rotatably connected to the inner wall of the shell, the moving block is threadedly connected to the surface of the bidirectional screw, the support rod is rotatably connected to the bottom of the moving block, the fixed rod is rotatably connected to the inner walls of the two support rods, the baffle is rotatably connected to the inner wall of the bottom of the shell by a torsion spring, and the slide plate is fixedly connected to the front end of the rear fixed rod; the side of the slide plate away from the fixed rod is slidably connected to the inner wall of the shell, and the moving block is threadedly connected to the surface of the bidirectional screw, the support rod is rotatably connected to the bottom of the moving block, the fixed rod is rotatably connected to the inner walls of the two support rods, and the baffle is rotatably connected to the inner wall of the bottom of the shell through the torsion spring. The surface of the moving block is slidably connected to the inner wall of the shell, the end of the fixing rod away from the slide plate is in contact with the inner wall of the shell, and the surface of the support rod is in contact with the inner wall of the shell; the surface of the sliding block is slidably connected to the inner wall of the shell, the right side of the knob is in contact with the left side of the tool, the right side of the tool is in contact with the left side of the grounding post, and the end of the wire away from the grounding post is fixedly connected to the inner wall of the shell. When the device is in use, the knob is opened and the tool and the grounding post in the shell are taken out, and then the grounding post is driven into the ground, so that the device can be grounded, thereby realizing the anti-electromagnetic interference of the device, ensuring that the terminal can be used in some places where electromagnetic interference exists. The segment receives and transmits communication information, which improves the application scope of the device. At the same time, the front and rear two bidirectional screws in the shell can be driven to rotate through tools. The bidirectional screw drives the two moving blocks to gather through the threads. The two gathered moving blocks push the two support rods to rotate around the fixed rod, and let the crossed support rods extend out of the bottom of the shell. The support rods will push the baffle to rotate and extend out of the shell. At this time, the terminal can be placed flat on the ground through the support rods, so that the terminal remains stable and ensures that the electromagnetic waves can be effectively scattered to the ground instead of reflecting or interfering with the normal operation of the terminal, further improving the terminal's anti-electromagnetic interference effect. A scanning camera is set on the top of the scanning code transmission terminal.

[0006] Preferably, the winding device includes a roller, a transmission rod, a connecting rod, a reciprocating screw, a winding roller, a guide plate, a clamping rod and a pulley, the transmission rod is rotatably connected to the inner wall of the shell, the roller is fixedly connected to the left end of the transmission rod, the connecting rod is installed at the end of the transmission rod away from the roller through a universal joint, the reciprocating screw is installed at the end of the connecting rod away from the transmission rod through a universal joint, the end of the reciprocating screw away from the connecting rod is fixedly connected with the winding roller, the guide plate is movably connected to the surface of the reciprocating screw, the clamping rod is slidably connected to the inner wall of the shell, and the pulley is rotatably connected to The inner wall at the bottom of the clamping rod; the surface of the pulley contacts with the top of the guide plate, the surface of the reciprocating screw is provided with a cross-type spiral groove, the inner wall of the guide plate is provided with a clamping block, and the clamping block is located in the cross-type spiral groove, the surface of the guide plate is slidably connected with the inner wall of the shell, and the surface of the roller contacts with the side of the slide plate away from the fixed rod. When the device is used, the bidirectional screw is rotated in the opposite direction to retract the support rod, and the support rod drives the fixed rod to move, and the fixed rod drives the slide plate to move and retract into the shell. At this time, the slide plate drives the roller in contact with it to rotate, and the roller belt The driving transmission rod rotates, and the transmission rod drives the reciprocating screw to rotate through the connecting rod, and the reciprocating screw drives the winding roller to rotate, and the winding roller will wind up the wire on the grounding column, which is convenient for the subsequent grounding column to be retracted into the shell, to prevent the wire from accumulating and winding, and affecting the use of the grounding column next time. When the device is in use, the fixed rod will drive the slide plate to extend out of the shell, and the slide plate will drive the roller and its subsequent winding roller to rotate in the opposite direction, so that the winding roller can release the wound wire, which is convenient for taking out and using the grounding column. When the device is in use, the reciprocating screw rotates through the cross-type spiral grooves on the surface and the blocks on the inner wall of the guide plate to drive the guide plate to The guide plate rotates, but the guide plate is limited by the inner wall of the shell, so the reciprocating screw will drive the guide plate to move back and forth, the guide plate moves to the right and the pulley rolls on its top, when the inclined surface of the guide plate moves to the pulley, the pulley will move down through the inclined surface at the top of the guide plate, and the pulley drives the clamping rod to move down. At this time, the clamping rod moves out of the protective cover, so the protective cover can be opened, allowing the user to operate the terminal in the shell or take out the terminal for handheld use, and the protective cover can protect the terminal when the device is not in use, and the clamping rod can limit it to prevent the protective cover from being easily opened and affecting its protective effect.

[0007] Preferably, the sealing device comprises an outer rod, an inner rod, a guide rod, a guide plate and a sealing block, the outer rod is fixedly connected to the front part of the rear moving block, the inner rod is slidably connected to the inner wall of the outer rod by a spring, the guide rod is fixedly connected to the front part of the inner rod, the sealing block is slidably connected to the inner wall of the shell, and the guide plate is fixedly connected to the bottom of the sealing block; the surface of the outer rod is slidably connected to the inner wall of the shell, the surface of the guide plate is provided with a guide groove, the surface of the guide rod and the inner wall of the guide groove are in contact with each other, and the top of the sealing block is in contact with the bottom of the protective cover; the ejection device comprises a top plate, an inclined groove and a push rod, the top plate is slidably connected to the inner wall of the shell, the inclined groove is provided on the surface of the top plate, the push rod is fixedly connected to the rear part of the front moving block, the surface of the push rod is in contact with the inner wall of the shell, the surface of the push rod is in contact with the inner wall of the inclined groove, the top of the top plate is in contact with the sweep The bottoms of the code transmission terminal are in contact with each other. After the device is used, the bidirectional screw at the rear is rotated first to make the card rod leave the protective cover. At the same time, when the two moving blocks at the rear are gathered together, the moving block drives the outer rod to move, and the outer rod drives the inner rod to move through the spring, and the inner rod drives the guide rod to move. The guide rod drives the guide plate to move down through the guide groove, and the guide plate drives the sealing block to move down and no longer contacts the protective cover to prevent the protective cover from rubbing against the sealing block when the protective cover is pulled open, thereby affecting the service life of the sealing block. When the guide plate moves down to a certain position, it will not be able to move further. After that, the movement of the moving block will only pull the outer rod and the inner rod apart and stretch the spring inside it, and then rotate the bidirectional screw in the front. At this time, the two moving blocks driven close by the bidirectional screw drive the two push rods close together, and the push rod pushes the top plate up through the inclined groove, and the top plate pushes the code scanning transmission terminal up, and the code scanning transmission terminal will extend to the top of the shell for subsequent use.

[0008] The present invention adopts the above technical solution to bring the following beneficial effects:

[0009] 1. The electromagnetic interference-proof handheld terminal operates in coordination with a shell, a protective cover, a slider, a knob, a tool, a grounding column, a wire, a bidirectional screw, a moving block, a support rod, a fixed rod, a baffle, a slide plate, and a code scanning transmission terminal. When the device is in use, the knob is opened and the tool and the grounding column in the shell are taken out, and then the grounding column is driven into the ground, so that the device can be grounded, thereby realizing the electromagnetic interference protection of the device, ensuring that the terminal can transmit information in some areas with electromagnetic interference, and improving the application scope of the device. At the same time, the support rod can be extended out of the shell. At this time, the terminal can be placed flat on the ground through the support rod, so that the terminal remains stable, ensuring that the electromagnetic waves can be effectively scattered on the ground instead of reflecting or interfering with the normal operation of the terminal, further improving the electromagnetic interference protection effect of the terminal, and placing the handheld transmission terminal on the ground can be more convenient for users to use.

[0010] 2. The electromagnetic interference-proof handheld terminal operates through the coordinated operation of the roller, transmission rod, connecting rod, reciprocating screw, winding roller, guide plate, clamping rod and pulley. When the device is used, the winding roller will wind up the wire on the grounding column, so that the subsequent grounding column can be retracted into the shell to prevent the wire from accumulating and winding, which will affect the use of the grounding column next time. When the device is in use, the fixed rod will drive the slide plate to extend out of the shell, and the slide plate will drive the roller and its subsequent winding roller to rotate in the opposite direction, so that the winding roller can release the wound wire, which is convenient for taking out and using the grounding column. When the device is in use, the clamping rod will move out of the protective cover, so the protective cover can be opened, allowing the user to operate the terminal in the shell or take out the terminal for handheld use. The protective cover can protect the terminal when the device is not in use, and the clamping rod can limit it to prevent the protective cover from being easily opened and affecting its protective effect.

[0011] 3. The electromagnetic interference-proof handheld terminal cooperates with the outer rod, the inner rod, the guide rod, the guide plate, the sealing block, the top plate, the inclined groove, and the push rod to operate. After the device is used, the bidirectional screw at the rear is rotated first to make the card rod leave the protective cover. At the same time, when the two moving blocks at the rear are gathered, the moving block drives the outer rod to move, and the outer rod drives the inner rod to move through the spring, and the inner rod drives the guide rod to move. The guide rod drives the guide plate to move downward through the guide groove, and the guide plate drives the sealing block to move downward and no longer contacts the protective cover to prevent the protective cover from rubbing against the sealing block when the protective cover is pulled open, thereby affecting the service life of the sealing block. When the guide plate moves down to a certain position, it will not be able to move further. After that, the movement of the moving block will only pull the outer rod and the inner rod apart and stretch the spring inside them, and then the bidirectional screw at the front is rotated. At this time, the two moving blocks driven close by the bidirectional screw drive the two push rods close, and the push rod pushes the top plate up through the inclined groove, and the top plate pushes the code scanning transmission terminal to move up, and the code scanning transmission terminal will extend to the top of the shell body for subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0013] Figure 2 A half-section view of the shell structure of the present invention;

[0014] Figure 3 This is a schematic diagram of the structure of the skateboard of the present invention;

[0015] Figure 4 It is a schematic diagram of the reciprocating screw structure of the present invention;

[0016] Figure 5 This is a schematic diagram of the outer rod structure of the present invention;

[0017] Figure 6 For the present invention Figure 5 A magnified view of the structure at center;

[0018] Figure 7 It is a schematic diagram of the top plate structure of the present invention.

[0019] In the figure: 1. shell; 2. protective cover; 3. slider; 4. grounding device; 41. knob; 42. tool; 43. grounding column; 44. wire; 5. supporting device; 51. bidirectional screw; 52. moving block; 53. supporting rod; 54. fixing rod; 55. baffle; 56. slide plate; 6. winding device; 61. roller; 62. transmission rod; 63. connecting rod; 64. reciprocating screw; 65. winding roller; 66. guide plate; 67. clamping rod; 68. pulley; 7. sealing device; 71. outer rod; 72. inner rod; 73. guide rod; 74. guide plate; 75. sealing block; 8. ejection device; 81. top plate; 82. inclined groove; 83. push rod; 9. code scanning transmission terminal. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-Figure 7An embodiment of the present invention is: an electromagnetic interference-proof handheld terminal, comprising a shell 1, a protective cover 2 is slidably connected to the inner wall of the top of the shell 1, sliders 3 are fixedly connected to the front and rear sides of the protective cover 2, a code scanning transmission terminal 9 is arranged on the inner wall of the shell 1, and a handle is installed at the front of the shell 1; a grounding device 4 is arranged on the inner wall of the shell 1, a supporting device 5 is arranged on the inner wall of the front and rear of the shell 1, a winding device 6 is arranged on the inner wall of the shell 1, a sealing device 7 is arranged on the inner wall of the shell 1, and an ejection device 8 is arranged at the bottom of the code scanning transmission terminal 9; the grounding device 4 includes a knob 41, a tool 42, a grounding column 43 and a wire 44, the knob 41 is threadedly connected to the inner wall on the left side of the shell 1, and the tool 42 is placed on the shell 1, the grounding post 43 is slidably connected to the inner wall of the shell 1, the wire 44 is fixedly connected to the right end of the grounding post 43, the knob 41 is opened and the tool 42 and the grounding post 43 in the shell 1 are taken out, and then the grounding post 43 is driven into the ground, so that the device can be grounded, and then the anti-electromagnetic interference of the device can be realized, ensuring that the terminal can receive and transmit communication information in some areas with electromagnetic interference, thereby improving the application scope of the device; the supporting device 5 includes a bidirectional screw 51, a moving block 52, a supporting rod 53, a fixing rod 54, a baffle 55 and a slide plate 56, the bidirectional screw 51 is rotatably connected to the inner wall of the shell 1, the moving block 52 is threadedly connected to the surface of the bidirectional screw 51, and the supporting rod 53 is rotatably connected to the inner wall of the shell 1. It is connected to the bottom of the moving block 52, the fixed rod 54 is rotatably connected to the inner walls of the two support rods 53, the baffle 55 is rotatably connected to the inner wall of the bottom of the shell 1 through a torsion spring, and the slide plate 56 is fixedly connected to the front end of the rear fixed rod 54; the side of the slide plate 56 away from the fixed rod 54 is slidably connected to the inner wall of the shell 1, the surface of the moving block 52 is slidably connected to the inner wall of the shell 1, the end of the fixed rod 54 away from the slide plate 56 is in contact with the inner wall of the shell 1, and the surface of the support rod 53 is in contact with the inner wall of the shell 1; the surface of the slider 3 is slidably connected to the inner wall of the shell 1, the right side of the knob 41 is in contact with the left side of the tool 42, the right side of the tool 42 is in contact with the left side of the grounding column 43, and the wire 44 is away from the grounding column 43. One end is fixedly connected to the inner wall of the shell 1, and the tool 42 can drive the front and rear two bidirectional screws 51 in the shell 1 to rotate. The bidirectional screw 51 drives the two moving blocks 52 to gather together through the thread. The two gathered moving blocks 52 push the two support rods 53 to rotate around the fixed rod 54, and let the crossed support rods 53 extend out of the bottom of the shell 1. The support rods 53 will push the baffle 55 to rotate and extend out of the shell 1. At this time, the terminal can be placed flat on the ground through the support rods 53, so that the terminal remains stable, ensuring that the electromagnetic waves can be effectively scattered to the ground instead of reflecting or interfering with the normal operation of the terminal, further improving the terminal's anti-electromagnetic interference effect, and a scanning camera is set on the top of the scanning code transmission terminal 9.

[0022] The winding device 6 includes a roller 61, a transmission rod 62, a connecting rod 63, a reciprocating screw 64, a winding roller 65, a guide plate 66, a clamping rod 67 and a pulley 68. The transmission rod 62 is rotatably connected to the inner wall of the housing 1, the roller 61 is fixedly connected to the left end of the transmission rod 62, the connecting rod 63 is installed at the end of the transmission rod 62 away from the roller 61 through a universal joint, the reciprocating screw 64 is installed at the end of the connecting rod 63 away from the transmission rod 62 through a universal joint, the end of the reciprocating screw 64 away from the connecting rod 63 is fixedly connected with the winding roller 65, the guide plate 66 is movably connected to the surface of the reciprocating screw 64, the clamping rod 67 is slidably connected to the inner wall of the housing 1, and the pulley 68 is rotatably connected to the bottom of the clamping rod 67 The inner wall of the part, when the device is used, the bidirectional screw 51 is rotated in the opposite direction to retract the support rod 53, and at the same time the support rod 53 will drive the fixing rod 54 to move, and the fixing rod 54 will drive the slide plate 56 to move and retract into the shell 1, at this time the slide plate 56 drives the roller 61 in contact with it to rotate, the roller 61 drives the transmission rod 62 to rotate, the transmission rod 62 drives the reciprocating screw 64 to rotate through the connecting rod 63, and the reciprocating screw 64 drives the winding roller 65 to rotate, and the winding roller 65 will wind up the wire 44 on the grounding column 43, so as to facilitate the subsequent retraction of the grounding column 43 into the shell 1, and prevent the wire 44 from accumulating and winding, which will affect the use of the grounding column 43 next time; the surface of the pulley 68 and the guide plate The tops of the guide plates 66 are in contact with each other, the surface of the reciprocating screw 64 is provided with a cross-type spiral groove, the inner wall of the guide plate 66 is provided with a card block, and the card block is located in the cross-type spiral groove, the surface of the guide plate 66 is slidably connected with the inner wall of the shell 1, and the surface of the roller 61 is in contact with the side of the slide plate 56 away from the fixed rod 54. When the device is in use, the fixed rod 54 will drive the slide plate 56 to extend out of the shell 1, and the slide plate 56 will drive the roller 61 and the subsequent winding roller 65 to rotate in the opposite direction, so that the winding roller 65 can release the wound wire 44, which is convenient for taking out the grounding column 43 for use. When the device is in use, the reciprocating screw 64 rotates through the cross-type spiral groove on the surface and the card block on the inner wall of the guide plate 66 to drive the guide The guide plate 66 rotates, but the guide plate 66 is limited by the inner wall of the shell 1, so the reciprocating screw 64 will drive the guide plate 66 to reciprocate, the guide plate 66 moves to the right and the pulley 68 will roll on its top, when the inclined surface of the guide plate 66 moves to the pulley 68, the pulley 68 will move downward through the top inclined surface of the guide plate 66, and the pulley 68 drives the clamping rod 67 to move downward, at this time the clamping rod 67 moves out of the protective cover 2, so the protective cover 2 can be opened, allowing the user to operate the terminal in the shell 1 or take out the terminal for handheld use, and the protective cover 2 can protect the terminal when the device is not in use, and the clamping rod 67 can limit it to prevent the protective cover 2 from being easily opened and affecting its protective effect.

[0023] Working principle: When the device is in use, the knob 41 is opened and the tool 42 and the grounding column 43 in the shell 1 are taken out, and then the grounding column 43 is driven into the ground, so that the device can be grounded, thereby realizing the device's anti-electromagnetic interference, ensuring that the terminal can transmit information in some areas with electromagnetic interference, and improving the scope of application of the device. At the same time, the tool 42 can drive the front and rear two bidirectional screws 51 in the shell 1 to rotate, and the bidirectional screw 51 drives the two moving blocks 52 to gather together through the thread. The gathered two moving blocks 52 push the two support rods 53 to rotate around the fixed rod 54, and let the crossed support rods 53 extend out of the bottom of the shell 1. The support rod 53 will push the baffle 55 to rotate and extend out of the shell 1. At this time, the terminal can be placed flat on the ground through the support rod 53, so that the terminal remains stable, ensuring that the electromagnetic waves can be effectively scattered to the ground instead of reflecting or interfering with the normal operation of the terminal, and further improving the terminal's anti-electromagnetic interference effect. When the user sells goods outdoors, when the customer scans the code transmission terminal 9 for payment, the code transmission terminal 9 will transmit the payment information to the user's mobile phone.

[0024] When the device is used, the bidirectional screw 51 is rotated in the opposite direction to retract the support rod 53. At the same time, the support rod 53 will drive the fixed rod 54 to move, and the fixed rod 54 will drive the slide plate 56 to move and retract into the shell 1. At this time, the slide plate 56 drives the roller 61 in contact with it to rotate, and the roller 61 drives the transmission rod 62 to rotate. The transmission rod 62 drives the reciprocating screw 64 to rotate through the connecting rod 63, and the reciprocating screw 64 drives the winding roller 65 to rotate. The winding roller 65 will rewind the wire 44 on the grounding column 43, which is convenient for the subsequent grounding column 43 to be retracted into the shell 1, to prevent the wire 44 from accumulating and then getting entangled, affecting the next use of the grounding column 43. When the device is in use, the fixed rod 54 will drive the slide plate 56 to extend out of the shell 1, and the slide plate 56 drives the roller 61 and its subsequent winding roller 65 to rotate in the opposite direction, so that the winding roller 65 can release the wound wire 44 , it is convenient to take out and use the grounding column 43. When the device is in use, the reciprocating screw 64 rotates through the cross-type spiral groove on the surface and the block on the inner wall of the guide plate 66 to drive the guide plate 66 to rotate, but the guide plate 66 is limited by the inner wall of the shell 1, so the reciprocating screw 64 will drive the guide plate 66 to move back and forth, the guide plate 66 moves to the right and the pulley 68 will roll on its top. When the inclined surface of the guide plate 66 moves to the pulley 68, the pulley 68 will move downward through the top inclined surface of the guide plate 66, and the pulley 68 drives the clamping rod 67 to move downward. At this time, the clamping rod 67 moves out of the protective cover 2, so the protective cover 2 can be opened, allowing the user to operate the terminal in the shell 1 or take out the terminal for handheld use, and the protective cover 2 can protect the terminal when the device is not in use, and the clamping rod 67 can limit it to prevent the protective cover 2 from being easily opened and affecting its protective effect.

[0025] See also Figure 1-Figure 7On the basis of the above embodiment, in another embodiment of the present invention, the sealing device 7 includes an outer rod 71, an inner rod 72, a guide rod 73, a guide plate 74 and a sealing block 75. The outer rod 71 is fixedly connected to the front of the rear moving block 52, the inner rod 72 is slidably connected to the inner wall of the outer rod 71 through a spring, the guide rod 73 is fixedly connected to the front of the inner rod 72, the sealing block 75 is slidably connected to the inner wall of the housing 1, and the guide plate 74 is fixedly connected to the bottom of the sealing block 75; the surface of the outer rod 71 .... A guide groove is provided on the surface, the surface of the guide rod 73 contacts the inner wall of the guide groove, the top of the sealing block 75 contacts the bottom of the protective cover 2, and after the device is used, the bidirectional screw 51 at the rear is rotated first to make the clamping rod 67 leave the protective cover 2, and at the same time, when the two moving blocks 52 at the rear are gathered together, the moving block 52 drives the outer rod 71 to move, the outer rod 71 drives the inner rod 72 to move through the spring, the inner rod 72 drives the guide rod 73 to move, the guide rod 73 drives the guide plate 74 to move downward through the guide groove, and the guide plate 74 drives the sealing block 75 to move downward and does not move. The ejection device 8 includes a top plate 81, an inclined groove 82 and a push rod 83. The top plate 81 is slidably connected to the inner wall of the shell 1. The inclined groove 82 is provided on the surface of the top plate 81. The push rod 83 is fixedly connected to the rear part of the front moving block 52. The surface of the push rod 83 contacts the inner wall of the shell 1. The surface of the push rod 83 contacts the inner wall of the inclined groove 82. The top of the top plate 81 contacts the inner wall of the shell 1. The top of the top plate 81 contacts the inner wall of the inclined groove 82. The bottoms of the code scanning transmission terminal 9 are in contact with each other. When the guide plate 74 moves down to a certain position, it will not be able to move further. After that, the movement of the moving block 52 will only pull the outer rod 71 and the inner rod 72 apart and stretch the spring inside them. Then, the bidirectional screw 51 in front is rotated. At this time, the two moving blocks 52 driven by the bidirectional screw 51 drive the two push rods 83 to move closer. The push rod 83 pushes the top plate 81 upward through the inclined groove 82. The top plate 81 pushes the code scanning transmission terminal 9 upward, and the code scanning transmission terminal 9 will extend to the top of the shell 1 for subsequent use.

[0026] Working principle: After the device is used, the bidirectional screw 51 at the rear is rotated first, so that the clamping rod 67 leaves the protective cover 2. At the same time, when the two moving blocks 52 at the rear are gathered together, the moving block 52 drives the outer rod 71 to move, and the outer rod 71 drives the inner rod 72 to move through the spring, and the inner rod 72 drives the guide rod 73 to move, and the guide rod 73 drives the guide plate 74 to move downward through the guide groove, and the guide plate 74 drives the sealing block 75 to move downward and no longer contact the protective cover 2, so as to prevent the protective cover 2 from rubbing against the sealing block 75 when the protective cover 2 is pulled open, thereby affecting the sealing block 75. 5. When the guide plate 74 moves down to a certain position, it will not be able to move further. Then the movement of the moving block 52 will only pull the outer rod 71 and the inner rod 72 apart and stretch the spring inside them. Then the front bidirectional screw 51 will be rotated. At this time, the two moving blocks 52 driven by the bidirectional screw 51 will drive the two push rods 83 to move closer. The push rods 83 push the top plate 81 upward through the inclined slot 82. The top plate 81 pushes the code scanning transmission terminal 9 upward. The code scanning transmission terminal 9 and the code scanning camera will extend to the top of the shell 1, which is convenient for subsequent customers to scan codes.

[0027] The present invention provides a handheld terminal for preventing electromagnetic interference. There are many methods and ways to implement the technical solution. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. A handheld terminal for preventing electromagnetic interference, comprising a housing, characterized in that: The inner wall of the top of the shell is slidably connected with a protective cover, the front and rear sides of the protective cover are fixedly connected with sliders, the inner wall of the shell is provided with a communication terminal body, and the front part of the shell is provided with a handle; The inner wall of the shell is provided with a grounding device, the inner walls of the front and rear parts of the shell are provided with a supporting device, the inner wall of the shell is provided with a winding device, the inner wall of the shell is provided with a sealing device, and the bottom of the communication terminal body is provided with an ejection device; The grounding device includes a knob, a tool, a grounding post and a wire, wherein the knob is threadedly connected to the inner wall of the left side of the shell, the tool is placed on the inner wall of the shell, the grounding post is slidably connected to the inner wall of the shell, and the wire is fixedly connected to the right end of the grounding post; The supporting device includes a bidirectional screw, a moving block, a support rod, a fixed rod, a baffle and a slide plate, wherein the bidirectional screw is rotatably connected to the inner wall of the shell, the moving block is threadedly connected to the surface of the bidirectional screw, the support rod is rotatably connected to the bottom of the moving block, the fixed rod is rotatably connected to the inner walls of the two support rods, the baffle is rotatably connected to the inner wall of the bottom of the shell through a torsion spring, and the slide plate is fixedly connected to the front end of the rear fixed rod; The winding device includes a roller, a transmission rod, a connecting rod, a reciprocating screw, a winding roller, a guide plate, a clamping rod and a pulley. The transmission rod is rotatably connected to the inner wall of the shell, the roller is fixedly connected to the left end of the transmission rod, the connecting rod is installed at the end of the transmission rod away from the roller through a universal joint, the reciprocating screw is installed at the end of the connecting rod away from the transmission rod through a universal joint, the end of the reciprocating screw away from the connecting rod is fixedly connected with the winding roller, the guide plate is movably connected to the surface of the reciprocating screw, the clamping rod is slidably connected to the inner wall of the shell, and the pulley is rotatably connected to the inner wall at the bottom of the clamping rod.

2. The electromagnetic interference-proof handheld terminal according to claim 1, characterized in that: The side of the slide away from the fixed rod is slidably connected to the inner wall of the shell, the surface of the moving block is slidably connected to the inner wall of the shell, the end of the fixed rod away from the slide is in contact with the inner wall of the shell, and the surface of the support rod is in contact with the inner wall of the shell.

3. The electromagnetic interference-proof handheld terminal according to claim 2, characterized in that: The surface of the slider is slidably connected to the inner wall of the shell, the right side of the knob contacts the left side of the tool, the right side of the tool contacts the left side of the grounding column, and the end of the wire away from the grounding column is fixedly connected to the inner wall of the shell.

4. The electromagnetic interference-proof handheld terminal according to claim 3, characterized in that: The surface of the pulley contacts the top of the guide plate, the surface of the reciprocating screw is provided with a cross spiral groove, the inner wall of the guide plate is provided with a block, and the block is located in the cross spiral groove, the surface of the guide plate is slidably connected to the inner wall of the shell, and the surface of the roller contacts the side of the slide plate away from the fixed rod.

5. The electromagnetic interference-proof handheld terminal according to claim 4, characterized in that: The sealing device includes an outer rod, an inner rod, a guide rod, a guide plate and a sealing block, the outer rod is fixedly connected to the front part of the rear moving block, the inner rod is slidably connected to the inner wall of the outer rod through a spring, the guide rod is fixedly connected to the front part of the inner rod, the sealing block is slidably connected to the inner wall of the shell, and the guide plate is fixedly connected to the bottom of the sealing block.

6. The electromagnetic interference-proof handheld terminal according to claim 5, characterized in that: The surface of the outer rod is slidably connected to the inner wall of the shell, the surface of the guide plate is provided with a guide groove, the surface of the guide rod and the inner wall of the guide groove are in contact with each other, and the top of the sealing block and the bottom of the protective cover are in contact with each other.

7. The electromagnetic interference-proof handheld terminal according to claim 6, characterized in that: The ejection device includes a top plate, an inclined groove and a push rod, the top plate is slidably connected to the inner wall of the shell, the inclined groove is opened on the surface of the top plate, the push rod is fixedly connected to the rear part of the front moving block, the surface of the push rod is in contact with the inner wall of the shell, the surface of the push rod is in contact with the inner wall of the inclined groove, and the top of the top plate is in contact with the bottom of the communication terminal body.

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