Light curing machine for orthodontic bonding of oral teeth

Abstract

The invention relates to the technical field of orthodontic bonding, in particular to an orthodontic bonding light curing machine which comprises a handheld end, a storage battery is mounted in the handheld end, a display screen is mounted on the outer side of the handheld end in an embedded mode, and a multi-end light curing mechanism with a plurality of irradiation ends is mounted at the end of the handheld end. The multi-end light curing mechanism comprises a cross-shaped sliding block, a linear motion assembly is installed in the middle of the cross-shaped sliding block, and four installation blocks are installed on the outer side of the cross-shaped sliding block in a magnetic attraction mode. The multiple light-emitting assemblies are adopted and can move to the corresponding irradiation requirement areas respectively, curing irradiation on multiple teeth in the oral cavity of a patient is achieved, the working efficiency is improved, and the practicability is high. In addition, a doctor can change the irradiation direction of the light-emitting assembly according to actual requirements, the irradiation direction of the light-emitting assembly can be turned only by pulling out and rotating the light-emitting assembly and the cross-shaped magnetic attraction clamping piece by a half circle and then inserting the cross-shaped magnetic attraction clamping piece into the cross-shaped clamping groove, and therefore the application range of the medical endoscope is wider.

Description

Technical Field

[0001] The invention relates to the technical field of tooth orthodontic bonding, in particular to a light curing machine for oral orthodontic bonding. Background Art

[0002] Photocuring refers to the curing process of monomers, oligomers or polymer matrices under light induction. This technology is characterized by high efficiency, wide adaptability, economy, energy saving and environmental protection. In the photocuring process, photosensitizers play a key role. After absorbing light energy, photosensitizers produce active species such as free radicals or ions, which then initiate polymerization reactions of materials such as resins. Photocuring is widely used. In the field of orthodontics, photocuring technology is usually not used directly in the process of correcting teeth, but may be used as a bonding bracket and accessories. Special resin materials are used to stick the brackets on the tooth surface, and then a light curing machine is used to irradiate the brackets coated with resin. Ultraviolet rays or blue light will excite the photosensitive components in the resin, causing it to cure quickly and adhere firmly to the teeth. The photocuring time depends on the type and thickness of the resin, and generally takes a few seconds to a few minutes, but in actual use, there are the following problems.

[0003] When doctors use light curing machines, they usually do it by hand. On the one hand, it takes up the doctors' precious time, reduces work efficiency, and increases labor intensity. On the other hand, during the curing process, the irradiation end of the light curing machine may deviate from the tooth to be irradiated due to the shaking of the doctor's hands or the shaking of the patient's head, affecting the curing efficiency.

[0004] Some light curing machines in the prior art are only equipped with one light-emitting end. When a patient needs to bond multiple brackets or accessories, that is, multiple teeth need to be cured by irradiation, the doctor needs to do it one by one, which wastes time and reduces work efficiency. Summary of the invention

[0005] In response to the above problems, the present application provides a light curing machine for oral orthodontic bonding, which solves the problem that doctors in the prior art mostly use hand-held operations when using light curing machines, which on the one hand takes up the doctor's valuable time, reduces work efficiency and increases labor intensity; on the other hand, during the curing process, the irradiation end of the light curing machine may deviate from the repaired tooth due to the doctor's hand shaking or the patient's head shaking, affecting the curing efficiency. Moreover, some light curing machines in the prior art are only equipped with one light-emitting end. When a patient needs to bond multiple brackets or accessories, that is, multiple teeth need to be irradiated and cured, the doctor needs to do it one by one, which is time-consuming and reduces work efficiency.

[0006] The technical solution of the present invention is:

[0007] A light curing machine for orthodontic bonding of oral teeth, comprising a handheld end, a battery is installed inside the handheld end, a display screen is inlaid and installed outside the handheld end, a multi-terminal light curing mechanism with multiple irradiation ends is installed at the end of the handheld end, and the multi-terminal light curing mechanism comprises a cross slider, a linear motion component is installed in the middle of the cross slider, four mounting blocks are magnetically installed outside the cross slider, and a light emitting component is installed outside the mounting block;

[0008] A fixing frame is installed on the outer side of the cross slide, and a plurality of fixing electromagnets are symmetrically fixedly installed on the inner side of the fixing frame. When the fixing electromagnets are energized, the mounting blocks are adsorbed and separated from the cross slide.

[0009] Furthermore, the linear motion assembly includes a motor, a lead screw is fixedly mounted on the output end of the motor, an end of the lead screw away from the motor is rotatably mounted on the inner side of a fixed frame, and a cross slide is movably mounted on the outer periphery of the lead screw;

[0010] Limit blocks are fixedly installed on the top and bottom of the cross slide block, and a limit groove which is slidably engaged with the limit block is opened on the inner side of the fixed frame.

[0011] Furthermore, the end of the handheld terminal is threadedly connected to a storage bin, a bite cover is fixedly installed on the outside of the storage bin, the top and bottom of the bite cover are provided with a snap-in groove, and a snap-in fixing plate is slidably snap-into the outside of the snap-in groove.

[0012] Furthermore, a mounting chamber is fixedly installed on the outside of the storage chamber, a motor is fixedly installed inside the mounting chamber, and an output end of the motor rotates through the mounting chamber, and a fixing frame is fixedly installed on the outside of the mounting chamber.

[0013] Furthermore, cameras and fill lights are fixedly mounted on both ends of the cross slider away from the fixing frame.

[0014] Furthermore, a first fixing groove is provided on the top of the mounting block, and the first fixing groove cooperates with the fixing electromagnet;

[0015] A moving electromagnet is fixedly mounted on the bottom of the mounting block, and a second fixing groove is provided on the top of the cross slide block, and the second fixing groove matches the moving electromagnet.

[0016] Furthermore, a coil spring is fixedly installed at the outer end inside the mounting block, a linkage column is fixedly installed at the inner end of the coil spring, the top of the linkage column rotates through the mounting block, the exposed end of the linkage column is fixedly connected to a connecting block, and the connecting block is movably connected to the light-emitting component.

[0017] Furthermore, a cross slot is provided at one end of the connection block close to the light emitting component, and a cross magnetic card is fixedly installed at one end of the light emitting component close to the connection block, and the cross magnetic card is plugged into and matched with the cross slot.

[0018] Furthermore, two blocking rods are symmetrically fixedly mounted on the fixing frame near the outer side of the motor.

[0019] Furthermore, a magnetic base is fixedly installed on the end of the handheld terminal.

[0020] The beneficial effects of the present invention are as follows:

[0021] (1) The light curing machine for oral orthodontic bonding of teeth described in the present invention adopts multiple light-emitting components. Compared with the commonly used fixed connection method in the prior art, the light-emitting components in the present invention that can be rotated and retracted can reduce their opening and closing angles and the width of their moving tracks, making it easier to put the multi-terminal light curing mechanism into the patient's mouth and also easier to take the multi-terminal light curing mechanism out of the patient's mouth;

[0022] Multiple light-emitting components can be moved to corresponding irradiation required areas respectively, so as to realize curing irradiation of multiple teeth in the patient's mouth that need to be bonded with brackets or accessories, thereby improving work efficiency. Doctors can also change the irradiation direction of the light-emitting component according to actual needs. They only need to pull out the light-emitting component and the cross magnetic card, rotate half a circle, and then insert the cross magnetic card into the cross card slot to achieve the reversal of the irradiation direction of the light-emitting component, thereby making the application scope of the present invention wider.

[0023] (2) In the light curing machine for oral orthodontic bonding described in the present invention, during the curing process, the doctor can rotate the multi-terminal light curing mechanism away from the handheld end, and the patient uses the tooth occlusal fixation plate without the doctor holding it, thereby reducing the doctor's labor intensity. During the light curing period, the doctor can handle other things, thereby improving work efficiency. In addition, the patient can fix the multi-terminal light curing mechanism to his or her head through his or her teeth. When the patient's head shakes, the light-emitting component moves synchronously, and the irradiated area remains basically unchanged, thereby reducing the error caused by external factors to the curing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 A schematic diagram of the overall structure of a light curing machine for oral orthodontic bonding provided by the present invention;

[0026] Figure 2 A schematic diagram of the working state structure of a light curing machine for oral orthodontic bonding provided by the present invention;

[0027] Figure 3 A schematic diagram of the structure of a multi-terminal light-curing mechanism of a light-curing machine for oral tooth orthodontic bonding provided by the present invention;

[0028] Figure 4 A schematic diagram of the internal structure of an installation chamber of a light curing machine for oral orthodontic bonding provided by the present invention;

[0029] Figure 5 A schematic diagram of the internal structure of a fixing frame of a light curing machine for oral orthodontic bonding provided by the present invention;

[0030] Figure 6 A schematic diagram of a cross-slider connection of a light curing machine for oral orthodontic bonding provided by the present invention;

[0031] Figure 7 A schematic diagram of the connection of a mounting block of a light curing machine for oral orthodontic bonding provided by the present invention;

[0032] Figure 8 A schematic diagram of the connection of a light-emitting component of a light-curing machine for oral tooth orthodontic bonding provided by the present invention.

[0033] In the figure:

[0034] 1. Handheld terminal;

[0035] 2. Display screen;

[0036] 3. Multi-terminal light curing mechanism; 31. Engagement cover; 32. Storage bin; 33. Snap-in slot; 34. Engagement fixing plate; 35. Mounting bin; 36. Motor; 37. Screw rod; 38. Fixing frame; 39. Cross slider; 310. Limiting slot; 311. Fixed electromagnet; 312. Limiting block; 313. Camera; 314. Fill light; 315. Mounting block; 316. Moving electromagnet; 317. First fixing slot; 318. Linkage column; 319. Coil spring; 320. Second fixing slot; 321. Connecting block; 322. Light-emitting assembly; 323. Cross magnetic card; 324. Cross card slot; 325. Stop lever;

[0037] 4. Magnetic base. DETAILED DESCRIPTION

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0039] like Figure 1-Figure 8As shown, an embodiment of the present invention provides a light curing machine for oral orthodontic bonding, including a handheld terminal 1, a battery is installed inside the handheld terminal 1, a display screen 2 is inlaid and installed on the outside of the handheld terminal 1, and a multi-terminal light curing mechanism 3 with multiple irradiation ends is installed at the end of the handheld terminal 1, which can simultaneously irradiate and cure multiple teeth of the patient that need to be bonded with brackets or accessories, thereby improving efficiency. The multi-terminal light curing mechanism 3 includes a cross slider 39, a linear motion component is installed in the middle of the cross slider 39, four mounting blocks 315 are magnetically installed on the outside of the cross slider 39, and a light emitting component 322 is installed on the outside of the mounting block 315;

[0040] A fixing frame 38 is installed on the outer side of the cross slide 39 , and a plurality of fixing electromagnets 311 are symmetrically fixedly installed on the inner side of the fixing frame 38 . When the fixing electromagnets 311 are energized, the mounting block 315 is adsorbed and separated from the cross slide 39 .

[0041] In this embodiment, the position of the light-emitting component 322 is adjusted, and the linear motion component drives the cross slider 39 and the light-emitting component 322 to move to the desired position, and then the corresponding fixed electromagnet 311 is started. Under the suction of the fixed electromagnet 311, the mounting block 315 is driven to separate from the cross slider 39 and adsorbed on the inner side of the fixed frame 38. The linear motion component drives the cross slider 39 to continue to move, and moves the remaining light-emitting components 322 to the desired position, thereby realizing the curing irradiation of multiple repaired teeth in the patient's mouth, thereby improving work efficiency.

[0042] Specifically, the linear motion assembly includes a motor 36, a screw rod 37 is fixedly installed at the output end of the motor 36, and is used to drive the cross slider 39 to move linearly. The end of the screw rod 37 away from the motor 36 is rotatably installed on the inner side of the fixed frame 38, and the cross slider 39 is movably installed on the outer periphery of the screw rod 37. Limit blocks 312 are fixedly installed on the top and bottom of the cross slider 39, and are used to limit the moving trajectory of the cross slider 39. A limit groove 310 is provided on the inner side of the fixed frame 38, which is slidably engaged with the limit block 312.

[0043] Specifically, the end of the handheld terminal 1 is threadedly connected with a storage bin 32, a bite cover 31 is fixedly installed on the outside of the storage bin 32, the top and bottom of the bite cover 31 are provided with a snap-in groove 33, and a snap-in fixing plate 34 is slidably snapped on the outside of the snap-in groove 33.

[0044] In this embodiment, the patient uses the teeth to bite the occlusal fixing plate 34, which does not require the doctor to hold it, thereby reducing the doctor's labor intensity. During the light curing period, the doctor can handle other things, thereby improving work efficiency. In addition, the patient uses the teeth to fix the multi-terminal light curing mechanism 3 to his own head. When the patient's head shakes, the light emitting component 322 moves synchronously, and the irradiation area remains basically unchanged, thereby reducing the error caused by external factors to the curing.

[0045] The doctor can replace the corresponding occlusal fixing plate 34 according to the size of the patient's oral cavity, which is convenient and quick.

[0046] Specifically, a mounting chamber 35 is fixedly installed outside the storage chamber 32 , a motor 36 is fixedly installed inside the mounting chamber 35 , and an output end of the motor 36 rotates and passes through the mounting chamber 35 , and a fixing frame 38 is fixedly installed outside the mounting chamber 35 .

[0047] Specifically, cameras 313 are fixedly installed at both ends of the cross slider 39 away from the fixed frame 38, which is convenient for the doctor to view the internal conditions of the patient's mouth and to control and adjust the light-emitting component 322. Fill lights 314 are fixedly installed at both ends of the cross slider 39 away from the fixed frame 38, without the need for external tools, so that the camera 313 can capture clearer images and it is also convenient for the doctor to directly view the internal conditions of the patient's mouth.

[0048] Specifically, a first fixed groove 317 is formed on the top of the mounting block 315, and the first fixed groove 317 cooperates with the fixed electromagnet 311. A movable electromagnet 316 is fixedly installed on the bottom of the mounting block 315. A second fixed groove 320 is formed on the top of the cross slider 39, and the second fixed groove 320 cooperates with the movable electromagnet 316.

[0049] In this embodiment, the light-emitting component 322 is reset, and the doctor controls the motor 36 to move the cross slider 39 to the position of the mounting block 315 and the light-emitting component 322, and then cuts off the power to the fixed electromagnet 311. Under the suction force of the moving electromagnet 316, the mounting block 315 and the light-emitting component 322 are driven to move toward the cross slider 39, and the moving electromagnet 316 is inserted into the second fixed slot 320.

[0050] Specifically, a coil spring 319 is fixedly installed inside the mounting block 315 at one end thereof. The coil spring 319 can be deformed to store force. When the external limiting force disappears, the stored force is used for resetting. A linkage column 318 is fixedly installed at the inner end of the coil spring 319. The top of the linkage column 318 rotates and passes through the mounting block 315. The exposed end of the linkage column 318 is fixedly connected to a connecting block 321, and the connecting block 321 is movably connected to the light-emitting component 322.

[0051] Specifically, a cross slot 324 is formed at one end of the connection block 321 close to the light emitting component 322 , and a cross magnetic card 323 is fixedly installed at one end of the light emitting component 322 close to the connection block 321 , and the cross magnetic card 323 is plugged into and matched with the cross slot 324 .

[0052] In this embodiment, the doctor can also change the irradiation direction of the light-emitting component 322 according to actual needs. The doctor only needs to pull out the light-emitting component 322 and the cross magnetic card 323, rotate them half a circle, and then insert the cross magnetic card 323 into the cross slot 324 to flip the irradiation direction of the light-emitting component 322, thereby making the application scope of the present invention wider.

[0053] Specifically, two blocking rods 325 are symmetrically fixedly installed on the outer side of the fixing frame 38 close to the motor 36, and are used to block the light-emitting assembly 322 to retract it.

[0054] In this embodiment, the light emitting component 322 is stored, the motor 36 is started, the motor 36 rotates to drive the screw 37 to rotate, and then drives the cross slide 39 and the light emitting component 322 to approach the motor 36, the light emitting component 322 moves to contact the blocking rod 325, the light emitting component 322 drives the connecting block 321 and the linkage column 318 to rotate, the coil spring 319 deforms and stores force, and the light emitting component 322 gradually enters the interior of the fixing frame 38. Compared with the common fixed connection method in the prior art, the rotatable light emitting component 322 in the present invention can reduce its opening and closing angle and the width of its moving track, which is convenient for placing the multi-terminal light curing mechanism 3 into the patient's mouth, and also convenient for taking the multi-terminal light curing mechanism 3 out of the patient's mouth;

[0055] The light-emitting component 322 is turned on and the motor 36 is started in reverse. The motor 36 rotates in reverse to drive the screw 37 to rotate in reverse, thereby driving the cross slider 39 and the light-emitting component 322 away from the motor 36. The light-emitting component 322 gradually breaks away from the restriction of the blocking rod 325. Under the elastic force of the coil spring 319, the light-emitting component 322 drives the linkage column 318, the connecting block 321, and the light-emitting component 322 to rotate in reverse and reset.

[0056] Specifically, a magnetic base 4 is fixedly installed at the end of the handheld terminal 1 to facilitate the stable placement of the handheld terminal 1.

[0057] How it works:

[0058] The light-emitting component 322 is stored, and the motor 36 is started. The rotation of the motor 36 drives the screw 37 to rotate, thereby driving the cross slider 39 and the light-emitting component 322 to approach the motor 36. The light-emitting component 322 moves to contact the blocking rod 325. The light-emitting component 322 drives the connecting block 321 and the linkage column 318 to rotate, and the coil spring 319 deforms to store force. The light-emitting component 322 gradually enters the interior of the fixed frame 38. Compared with the common fixed connection method in the prior art, the rotatable light-emitting component 322 in the present invention can reduce its opening and closing angle and the width of its moving trajectory, which is convenient for placing the multi-terminal light-curing mechanism 3 into the patient's mouth and also convenient for taking the multi-terminal light-curing mechanism 3 out of the patient's mouth.

[0059] The light-emitting component 322 is turned on and the motor 36 is started in reverse. The motor 36 rotates in reverse to drive the screw 37 to rotate in reverse, thereby driving the cross slider 39 and the light-emitting component 322 away from the motor 36. The light-emitting component 322 gradually breaks away from the restriction of the blocking rod 325. Under the elastic force of the coil spring 319, the light-emitting component 322 drives the linkage column 318, the connecting block 321, and the light-emitting component 322 to rotate in reverse and reset.

[0060] The position of the light emitting component 322 is adjusted, the fill light 314 is turned on, the camera 313 takes a picture of the inside of the patient's mouth, and transmits the picture to the display screen 2. The doctor controls the motor 36 to move the cross slider 39 and the light emitting component 322 to the desired position, and then starts the corresponding fixed electromagnet 311. Under the suction of the fixed electromagnet 311, the mounting block 315 is driven to separate from the cross slider 39 and adsorbed on the inner side of the fixing frame 38. The cross slider 39 continues to move to move the remaining light emitting components 322 to the desired position, thereby realizing the treatment of multiple particles in the patient's mouth. The repaired teeth are cured and irradiated to improve work efficiency. When in use, the doctor can rotate the multi-terminal light-curing mechanism 3 away from the handheld end 1, and the two are connected by wires. The patient uses the tooth occlusal occlusal fixing plate 34, which does not require the doctor to hold it, reducing the doctor's labor intensity. During the light-curing period, the doctor can handle other things, improving work efficiency. The patient uses the teeth to fix the multi-terminal light-curing mechanism 3 to his own head. When the patient's head shakes, the light-emitting component 322 moves synchronously, and the irradiation area remains basically unchanged, reducing the error caused by external factors to the curing.

[0061] The light-emitting component 322 is reset, and the doctor controls the motor 36 to move the cross slider 39 to the position of the mounting block 315 and the light-emitting component 322, and then cuts off the power to the fixed electromagnet 311. Under the suction force of the moving electromagnet 316, the mounting block 315 and the light-emitting component 322 are driven to move toward the cross slider 39, and the moving electromagnet 316 is inserted into the second fixed slot 320.

[0062] Doctors can also change the irradiation direction of the light emitting component 322 according to actual needs. They only need to pull out the light emitting component 322 and the cross magnetic card 323, rotate them half a circle, and then insert the cross magnetic card 323 into the cross slot 324 to flip the irradiation direction of the light emitting component 322, thereby making the application scope of the present invention wider.

[0063] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A light curing machine for orthodontic bonding of oral teeth, comprising a handheld end (1), a battery installed inside the handheld end (1), and a display screen (2) embedded and installed outside the handheld end (1), characterized in that: The handheld end (1) is provided with a multi-terminal light curing mechanism (3) having a plurality of irradiation ends, the multi-terminal light curing mechanism (3) comprising a cross slider (39), a linear motion component being provided in the middle of the cross slider (39), four mounting blocks (315) being magnetically mounted on the outer side of the cross slider (39), and a light emitting component (322) being provided on the outer side of the mounting block (315); A fixing frame (38) is installed on the outer side of the cross slide (39), and a plurality of fixing electromagnets (311) are symmetrically fixedly installed on the inner side of the fixing frame (38). When the fixing electromagnets (311) are energized, the mounting block (315) is adsorbed and separated from the cross slide (39).

2. The light curing machine for oral orthodontic bonding according to claim 1, characterized in that: The linear motion assembly comprises a motor (36), a screw rod (37) is fixedly mounted on the output end of the motor (36), an end of the screw rod (37) away from the motor (36) is rotatably mounted on the inner side of a fixed frame (38), and a cross slide (39) is movably mounted on the outer periphery of the screw rod (37); The top and bottom of the cross slide block (39) are fixedly mounted with limit blocks (312), and the inner side of the fixed frame (38) is provided with a limit groove (310) which is slidably engaged with the limit block (312).

3. The light curing machine for oral orthodontic bonding according to claim 1, characterized in that: The end of the handheld end (1) is threadedly connected with a storage bin (32), a bite cover (31) is fixedly installed on the outside of the storage bin (32), a snap-fitting groove (33) is provided on the top and bottom of the bite cover (31), and a snap-fitting fixing plate (34) is slidably snap-fitted on the outside of the snap-fitting groove (33).

4. A light curing machine for oral orthodontic bonding according to any one of claims 2 or 3, characterized in that: The outside of the storage bin (32) is fixedly mounted with a mounting bin (35), the motor (36) is fixedly mounted inside the mounting bin (35), and the output end of the motor (36) rotates through the mounting bin (35), and the fixing frame (38) is fixedly mounted on the outside of the mounting bin (35).

5. The light curing machine for oral orthodontic bonding according to claim 1, characterized in that: Cameras (313) and fill-in lights (314) are fixedly mounted on both ends of the cross slide (39) away from the fixing frame (38).

6. The light curing machine for oral orthodontic bonding according to claim 1, characterized in that: The top of the mounting block (315) is provided with a first fixing groove (317), and the first fixing groove (317) matches with the fixing electromagnet (311); A moving electromagnet (316) is fixedly mounted on the bottom of the mounting block (315), and a second fixing groove (320) is provided on the top of the cross slide block (39), and the second fixing groove (320) matches the moving electromagnet (316).

7. The light curing machine for oral orthodontic bonding according to claim 1, characterized in that: The mounting block (315) has a coil spring (319) fixedly mounted on its outer end, and a linkage column (318) fixedly mounted on its inner end. The top of the linkage column (318) rotates through the mounting block (315), and the exposed end of the linkage column (318) is fixedly connected to a connection block (321), which is movably connected to the light-emitting component (322).

8. The light curing machine for oral orthodontic bonding according to claim 7, characterized in that: A cross card slot (324) is provided at one end of the connection block (321) close to the light emitting component (322), and a cross magnetic card member (323) is fixedly installed at one end of the light emitting component (322) close to the connection block (321), and the cross magnetic card member (323) is plugged into and matched with the cross card slot (324).

9. The light curing machine for oral orthodontic bonding according to claim 2, characterized in that: Two blocking rods (325) are symmetrically fixedly mounted on the outer side of the fixing frame (38) close to the motor (36).

10. The light curing machine for oral orthodontic bonding according to claim 1, characterized in that: A magnetic base (4) is fixedly mounted on the end of the handheld terminal (1).

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