Automatic sample changing device based on medical nuclide activity meter

Abstract

The utility model belongs to the technical field of medical nuclear instruments, and particularly relates to an automatic sample changing device based on a medical nuclide activity meter. Comprising a main body and a medical nuclide activity meter, and the main body is arranged at the top of the medical nuclide activity meter. The automatic sample changing device has the beneficial effects that (1) the automatic sample changing operation of most common medical activity meters can be realized through the lightweight and miniaturized automatic sample changing device; (2) the automatic sample changing device has few interfaces, is simple to connect and convenient to operate, reduces the learning cost of medical personnel, and greatly improves the working efficiency; (3) the guide rail is embedded in the automatic sample changing device, so that the vertical space is saved, and the whole structure is more stable and attractive; and (4) limiting grooves are formed in the ends of the inner guide rails, so that the consistency of sample conveying positions every time is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical nuclear instruments, and in particular relates to an automatic sample changing device based on a medical nuclide activity meter. Background Art

[0002] With the rapid development of nuclear medicine, radiopharmaceuticals are widely used in clinical diagnosis and treatment. Radioactive medical activity meters are special equipment for measuring the activity of radionuclides. However, the operators of medical activity meters still need to manually take and place radioactive drugs for measurement under necessary radiation protection conditions. Therefore, in the process of taking and placing radioactive drugs, operators are at risk of being irradiated by radioactive drugs, and there is also a risk of leakage of radioactive drugs. In addition, manual placement has the problem of large errors in the position of samples each time. Based on the characteristics of existing medical activity meters, it is urgent to use automation technology to replace manual work to complete a large number of simple and repetitive sample replacement tasks, so as to reduce the contact time between hospital staff and radioactive drugs. Utility Model Content

[0003] The utility model aims to provide an automatic sample changing device based on a medical nuclide activity meter, which can solve the problems of long-term close contact with radioactive materials by medical staff and large errors in the position of manually placed samples, and provides great convenience for the activity meter to accurately measure the activity of samples.

[0004] The technical solution of the utility model is as follows: an automatic sample changing device based on a medical nuclide activity meter comprises a main body and a medical nuclide activity meter, wherein the main body is arranged on the top of the medical nuclide activity meter.

[0005] The main body includes a shell, one side of the shell is provided with a main controller interface and a foot switch interface, the side of the shell opposite to the side provided with the main controller interface and the foot switch interface is provided with a power supply interface, and the lower part of the shell is connected to a disc-shaped counterweight base.

[0006] The counterweight base and the activity meter are positioned and joined.

[0007] The outer shell contains a guide mechanism, a sample lifting slot and a conveying device.

[0008] The guide mechanism comprises a guide mechanism bracket, a left baffle, a right baffle and a control circuit board, the control circuit board is connected to the back side of the guide mechanism bracket, the sample lifting slot is clamped between the left baffle, the right baffle and the guide mechanism bracket and moves up and down along the guide slot formed by them;

[0009] The conveying device includes a brushless motor, which is installed on the counterweight base through a motor seat. The motor shaft of the brushless motor passes through the hole of the first side plate and drives the driven shaft through a synchronous belt. The driven shaft drives the guide wheel shaft installed on the second side plate through a gear transmission mechanism. The sample lifting groove passes through the center hole of the counterweight base. A rack is provided on the sample lifting groove. The guide wheel shaft drives the sample lifting groove to move up and down through a gear rack structure.

[0010] The upper and lower ends of the inner side of the first side plate are respectively connected with an upper limit switch and a lower limit switch.

[0011] The shell is made of white POM material, the power interface is a 5.5*2.5mm DC power socket, the main controller interface is a 6-pin aviation plug female socket, and the foot switch interface is a 3-pin aviation plug female socket.

[0012] The beneficial effects of the present invention are: (1) the automatic sample changing operation of most commonly used medical activity meters can be realized through a lightweight and miniaturized automatic sample changing device; (2) the automatic sample changing device has few interfaces, simple connection, and convenient operation, which reduces the learning cost of medical personnel and greatly improves work efficiency; (3) the guide rail is embedded in the automatic sample changing device, saving vertical space, and the overall structure is more stable and beautiful; (4) a limit groove is set at the end of the internal guide rail to ensure the consistency of the sample transfer position each time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a front view of an automatic sample changing device based on a medical nuclide activity meter provided by the utility model;

[0014] Figure 2 An isometric view of an automatic sample changing device based on a medical nuclide activity meter provided by the utility model;

[0015] Figure 3 This is a first internal structure diagram of an automatic sample changing device based on a medical nuclide activity meter provided by the utility model;

[0016] Figure 4 The second internal structure diagram of an automatic sample changing device based on a medical nuclide activity meter provided by the utility model.

[0017] In the figure: 1 main body, 2 medical radionuclide activity meter, 3 shell, 4 main controller interface, 5 foot switch interface, 6 power interface, 7 counterweight base, 8 sample lifting slot, 9 guide mechanism bracket, 10 left baffle, 11 right baffle, 12 control circuit board, 13 brushless motor, 14 synchronous belt, 15 driven shaft, 16 rack, 17 guide wheel shaft, 18 upper limit switch, 19 lower limit switch. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0019] like Figure 1 As shown, the utility model provides an automatic sample changing device based on a medical nuclide activity meter, which completes the automatic sample changing of radioactive drugs when the medical nuclide activity meter is measuring. The device comprises a main body 1 and a medical nuclide activity meter 2, wherein the main body 1 is arranged on the top of the medical nuclide activity meter 2.

[0020] like Figure 2 As shown, the main body 1 includes a shell 3 which is a frame structure similar to a rectangular parallelepiped, a main controller interface 4 and a foot switch interface 5 are provided on one side of the shell 3, a power supply interface 6 is provided on the side of the shell 3 opposite to the side where the main controller interface 4 and the foot switch interface 5 are provided, and the lower part of the shell 3 is connected to a disc-shaped counterweight base 7.

[0021] The outer shell 3 contains a guide mechanism, a sample lifting slot 8 and a conveying device.

[0022] like Figure 3 and 4 As shown, the guide mechanism is fixed on the counterweight base 7, and the guide mechanism includes a guide mechanism bracket 9, a left baffle 10, a right baffle 11 and a control circuit board 12. The control circuit board 12 is connected to the back of the guide mechanism bracket 9. The sample lifting tank 8 is stuck between the left baffle 10, the right baffle 11 and the guide mechanism bracket 9 and moves up and down along the guide groove formed by them; wherein the conveying device includes a brushless motor 13, the motor shaft of the brushless motor 13 passes through the hole of the guide mechanism bracket 9 and drives the driven shaft 15 through the synchronous belt 14, and the driven shaft 15 drives the sample lifting tank 8 equipped with a rack 16 to move up and down through the gear transmission mechanism, and the guide wheel shaft 17 applies a positive preload force to the sample lifting tank 8. The long strip sample lifting tank 8 passes through the central hole of the counterweight base 7, and the bottom of the sample lifting tank 8 is a flat bowl-shaped structure. The upper and lower ends of the inner side of the guide mechanism bracket 9 are respectively connected to the upper limit switch 18 and the lower limit switch 19.

[0023] The housing 3 is integrally covered on the guide mechanism bracket 9 , the conveying device and the upper part of the sample lifting tank 8 .

[0024] The housing 3 is made of white POM material, and the main body 1 of the automatic sample changer is positioned and joined with the activity meter 2 through the counterweight base 7, and does not need to be fixed. The main body 1 of the automatic sample changer is provided with a power interface 6, a main controller interface 4 and a foot switch interface 5. The power interface 6 is a 5.5*2.5mm DC power socket, the main controller interface 4 is a 6-pin aviation plug female socket, and the foot switch interface 5 is a 3-pin aviation plug female socket. The sample lifting tank 8 is made of white POM.

[0025] The control circuit board 12 mainly receives external control signals to control the start and stop of the motor. The brushless motor 13 and the synchronous belt 14 form a transmission mechanism to realize the lifting function of the device. The upper limit switch 18 and the lower limit switch 19 are installed at the upper and lower ends of the inner side of the guide mechanism bracket 9. The guide wheel shaft 17 is made of stainless steel to provide positive pre-tightening and guiding effects on the sample lifting slot 8.

[0026] The working process of the utility model is as follows:

[0027] When a switch signal is sent manually to the control circuit board 12 inside the device through the main controller interface 4 or the foot switch interface 5 via the main controller button or the foot switch pedal, the control circuit board 12 controls the brushless motor 13 to drive the driven shaft 15 to rotate through the synchronous belt 14, and the driven shaft 15 drives the sample lifting slot 8 equipped with a rack 16 to rise and fall through the gear transmission mechanism, thereby completing the action of loading or removing the radioactive drugs in the sample lifting slot 8.

[0028] When the sample lifting slot 8 moves to the bottom, the upper limit switch 18 is triggered, and the control circuit board 12 stops the brushless motor 13 from rotating and locks it after receiving the in-position signal. At this time, the device can only rise but not fall; when the sample lifting slot 8 moves to the top, the lower limit switch 19 is triggered, and the control circuit board 12 stops the brushless motor 13 from rotating and locks it after receiving the in-position signal. At this time, the device can only fall but not rise, thereby ensuring that the relative position of the guide rails is consistent each time the sample is loaded or taken out.

[0029] After the power interface 6 in the activity meter automatic detection device is plugged into the power supply and connected to the control switch, the device can receive the injection and sampling signals from the main control switch or the foot control switch from the main controller interface 4 and the foot switch interface 5, thereby realizing the injection and sampling operations of the activity meter. The principles and operating steps of the two operating modes are the same.

[0030] The utility model can realize automatic sample changing detection of medical radionuclide activity meters, and can be compatible with the automatic sample changing operations of most commonly used medical radionuclide activity meters on the market. In addition, the overall device has few interfaces, simple connection, and convenient operation. The automatic sample changing device is lightweight and miniaturized through the design of embedded guide rails, saving vertical space, and limit grooves are arranged at the upper and lower ends of the guide rails to ensure the consistency of the sample transmission position each time.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic sample changing device based on a medical nuclide activity meter, characterized in that: The invention comprises a main body and a medical nuclide activity meter, wherein the main body is arranged on the top of the medical nuclide activity meter; the main body comprises a shell, one side of the shell is provided with a main controller interface and a foot switch interface, a power supply interface is arranged on the side of the shell opposite to the side provided with the main controller interface and the foot switch interface, and the lower part of the shell is connected to a disc-shaped counterweight base; the inner cover of the shell is provided with a guide mechanism, a sample lifting slot and a conveying device; The guide mechanism comprises a guide mechanism bracket, a left baffle, a right baffle and a control circuit board, the control circuit board is connected to the back side of the guide mechanism bracket, the sample lifting slot is clamped between the left baffle, the right baffle and the guide mechanism bracket and moves up and down along the guide slot formed by them; The conveying device includes a brushless motor, the motor shaft of the brushless motor passes through the guide mechanism bracket hole and drives the driven shaft through a synchronous belt, the driven shaft drives the sample lifting trough equipped with a rack to lift and lower through a gear transmission mechanism, the sample lifting trough passes through the center hole of the counterweight base, the sample lifting trough is provided with a rack, and the bottom of the sample lifting trough is a flat bowl-shaped structure.

2. The automatic sample changing device based on the medical nuclide activity meter according to claim 1, characterized in that: The counterweight base and the activity meter are positioned and joined.

3. The automatic sample changing device based on the medical nuclide activity meter according to claim 1, characterized in that: The upper and lower ends of the inner side of the guide mechanism bracket are respectively connected with an upper limit switch and a lower limit switch.

4. The automatic sample changing device based on the medical nuclide activity meter according to claim 1, characterized in that: The shell is made of white POM material, the power interface is a 5.5*2.5mm DC power socket, the main controller interface is a 6-pin aviation plug female socket, and the foot switch interface is a 3-pin aviation plug female socket.

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