Control circuit applied to stereomicroscope

Abstract

The utility model discloses a control circuit applied to a stereomicroscope, which comprises a power supply access end, a mechanical switch, a boost chip, a power supply output end, a first diode element, an adjusting resistor and a second diode element, two ends of the first diode element are respectively connected with the power supply input end and the mechanical switch, the boost chip comprises a first pin and a second pin, the second diode element is connected to the first pin, the adjusting resistor is connected to the second pin, and the power supply output end is connected with an LED lamp. According to the utility model, the battery pack is used as a power supply source, and the corresponding control circuit is designed, so that the use flexibility and the working efficiency of the microscope can be effectively improved.

Description

Technical Field

[0001] The utility model relates to but is not limited to the field of circuit technology, and in particular to a control circuit applied to a stereo microscope. Background Art

[0002] As an important optical instrument, stereo microscopes are widely used in many fields such as scientific research, education, medical treatment and industrial production. Traditional stereo microscopes are usually powered by AC power, which is very convenient when used in a fixed position. However, in certain specific scenarios, such as workshop environments, microscopes may need to be moved frequently to observe samples in different positions. Specifically, in industrial production environments such as workshops, microscopes are used frequently and the observation positions are varied. The traditional AC power supply method limits the mobility of the microscope because it is necessary to find a suitable power socket for connection, which not only increases the difficulty of use, but may also affect work efficiency. Summary of the Invention

[0003] In view of the above problems, the present invention proposes a control circuit for a stereo microscope, which can effectively improve the flexibility and work efficiency of the microscope.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] The utility model proposes a control circuit for a stereo microscope, comprising a power supply input terminal, a mechanical switch, a boost chip and a power supply output terminal connected in sequence, wherein the power supply input terminal is externally connected to a battery pack, and the control circuit further comprises a first diode element, an adjustment resistor and a second diode element, wherein the two ends of the first diode element are respectively connected to the power supply input terminal and the mechanical switch, the boost chip comprises a first pin and a second pin, the second diode element is connected to the first pin, the adjustment resistor is connected to the second pin, and the power supply output terminal is connected to an LED lamp.

[0006] According to some embodiments of the present invention, the control circuit further includes a first capacitor and a second capacitor, and the first capacitor and the second capacitor are both connected in parallel with the first diode element.

[0007] According to some embodiments of the present invention, a first resistor and a second resistor are respectively connected in series between the regulating resistor and the boost chip, and the regulating resistor includes a first terminal and a second terminal, the first terminal is connected to the first resistor, the second terminal is connected to the second resistor, and the first resistor and the second resistor are connected.

[0008] According to some embodiments of the present invention, the control circuit further includes a third resistor, a fourth resistor, and a third capacitor connected in parallel, one end of the third resistor is connected to the second diode element, and the other end of the third resistor is connected to the second resistor.

[0009] According to some embodiments of the present invention, the control circuit further includes an inductor element, and the inductor element is connected in parallel with the boost chip.

[0010] According to some embodiments of the present invention, the boost chip includes a third pin and a fourth pin, one end of the inductor element is connected to the third pin and the fourth pin respectively, and the other end is connected to the first pin.

[0011] According to some embodiments of the present invention, the control circuit further includes a fourth capacitor and a fifth capacitor connected in parallel, one end of the fourth capacitor is connected to the third capacitor, and the other end is grounded.

[0012] According to some embodiments of the present invention, the control circuit further includes a fifth resistor and a sixth resistor connected in parallel, one end of the fifth resistor is connected to the fifth capacitor, and the other end is connected to the power output end.

[0013] According to some embodiments of the present invention, the power output end includes a first input end and a second input end, the first input end is connected to the fifth resistor, and the second input end is connected to the fifth capacitor.

[0014] According to some embodiments of the present invention, the resistance adjustment range of the adjustment resistor is 0 to 10,000 ohms.

[0015] The utility model has at least one of the following beneficial technical effects:

[0016] 1. By using a battery pack as the power source and designing the corresponding control circuit, the stereo microscope can be freed from the constraints of a mains power outlet, achieving true portability and mobility. The microscope can be moved to any desired observation location, greatly improving the microscope's flexibility and work efficiency.

[0017] 2. The boost chip in the control circuit effectively increases the battery pack's output voltage, ensuring a stable power supply for the LED light. Furthermore, by adjusting the resistor settings, the output voltage can be further adjusted to suit the power requirements of different LED lights, thus ensuring the normal operation and lighting effect of the microscope.

[0018] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0020] Figure 1 It is a schematic diagram of the overall structure of the control circuit provided by the utility model. DETAILED DESCRIPTION

[0021] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0022] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0023] In the description of this utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] The following is a further description of the embodiments of the present invention with reference to the accompanying drawings.

[0026] Reference Figure 1 , Figure 1This is a schematic diagram of the overall structure of the control circuit provided by the present invention. This control circuit can be applied to stereo microscopes and includes multiple components connected in sequence. First, the power supply terminal P1 serves as the circuit's starting point and can be connected to an external battery pack for power. Next, a mechanical switch SW is connected to the power supply terminal P1 to control the circuit's on / off state. Following the mechanical switch SW is a first diode element D1, whose terminals are connected to the power supply terminal P1 and the mechanical switch SW, respectively, to provide rectification or protection. Specifically, the power supply terminal P1 is equipped with a first interface N1 and a second interface N2, while the mechanical switch SW is equipped with a first interface M1 and a second interface M2. The anode of the first diode element D1 is connected to the first interface N1, and its cathode is connected to the second interface M2. The second interface N2 is connected to the first interface M1. Next, a boost chip U1 is connected to the circuit and includes a first pin and a second pin. The anode of the second diode element D2 is connected to the first pin, while the regulating resistor R1 can be connected to the second pin to adjust the output voltage. In addition, the power output terminal P2 is connected to an LED light, which can provide the required power for the stereo microscope or other equipment.

[0027] In some embodiments of the present invention, the first diode element D1 may be a TVS diode (Transient Voltage Suppressor Diode), also known as a transient voltage suppressor (TVS). This diode is an electronic component specifically designed to protect circuits from transient overvoltage surges. By rapidly responding to and absorbing overvoltage, a TVS diode ensures stable circuit operation and prevents damage or malfunction caused by overvoltage.

[0028] In some embodiments of the present invention, the resistance of the regulating resistor R1 can be adjusted within a range of 0 ohms to 10,000 ohms. This adjustment allows the output voltage to be flexibly adjusted between 8.45V and 12V. As the output voltage changes, the brightness of the LED lamp can also be smoothly adjusted from 0% to 100%. In particular, when the output voltage reaches 12V, the brightness of the LED lamp reaches its maximum value, i.e., 100% brightness.

[0029] In some embodiments of the present invention, the power supply terminal P1 can be connected to a 5V battery pack output to power the device. In order to save power, when the light is not needed, the power supply can be stopped by disconnecting the mechanical switch SW.

[0030] In some embodiments of the present invention, the boost chip U1 can use a chip model MT3540. It should be noted that MT3540 is a current-mode boost converter, and its pins generally include the following pins: an input voltage pin (VIN), which can be used to receive input voltage. In MT3540, the input voltage range is generally 2.5V to 5.5V; a switch pin (SW), which is used to connect an external inductor. When the chip is working, the voltage on this pin can periodically switch between high and low levels to achieve a boost function; a feedback pin (FB), which is used to receive a feedback signal of the output voltage to control the output voltage of the chip. By adjusting the resistor divider network connected to the FB pin, the desired output voltage can be set; a ground pin (GND), which is the ground terminal of the chip; an enable pin (EN), which is a control pin used to turn the chip on or off. When the EN pin is set to a high level, the chip starts working and outputs a boosted voltage, with the output voltage reaching up to 28V; when the EN pin is set to a low level, the chip stops working and does not output any voltage.

[0031] In some embodiments of the present invention, the pins of the boost chip U1 can be configured as follows: its first pin is designated as the SW pin, and the second pin is the FB pin. Furthermore, the positive pole of the second diode element D2 is directly connected to the SW pin. In order to more finely control the circuit, the regulating resistor R1 is connected to the boost chip U1 through a first resistor R2 and a second resistor R3 connected in series. Specifically, the regulating resistor R1 includes a first terminal and a second terminal, wherein the first terminal is connected to the first resistor R2, and the second terminal is connected to the second resistor R3, and the first resistor R2 and the second resistor R3 are connected to each other. By adjusting the parameters of the resistor R1, the output voltage can be effectively adjusted to meet the power supply requirements of different LED lamps, thereby ensuring that the microscope can work normally and provide good lighting effects.

[0032] In some embodiments of the present invention, the control circuit further includes an inductor L1, which is connected in parallel with the boost chip U1. Specifically, the boost chip U1 has a third pin and a fourth pin, with one end of the inductor L1 connected to each of these pins, and the other end connected to the SW pin. Specifically, the third pin can be the enable pin EN, and the fourth pin can be the input voltage pin VIN.

[0033] In addition, in some other embodiments of the present invention, the boost chip U1 further includes a ground pin GND for providing a stable ground connection.

[0034] In some embodiments of the present invention, the control circuit further includes a first capacitor C1 and a second capacitor C2 , both of which can be connected in parallel with the first diode element D1 and work together to stabilize and filter the circuit.

[0035] Furthermore, in some embodiments of the present invention, the control circuit further includes a third resistor R4, a fourth resistor R5, and a third capacitor C3 connected in parallel. One end of the third resistor R4 is closely connected to the cathode of the second diode element D2, and the other end is cleverly connected to the second resistor R3.

[0036] In some embodiments of the present invention, the control circuit further includes a fourth capacitor C4 and a fifth capacitor C5 connected in parallel. One end of the fourth capacitor C4 is tightly connected to the third capacitor C3, achieving mutual cooperation between the capacitors, while the other end is securely grounded, providing additional stability and protection for the entire circuit.

[0037] In some embodiments of the present invention, a fifth resistor R6 and a sixth resistor R7 are further provided in parallel within the control circuit. One end of the fifth resistor R6 is connected to the fifth capacitor C5, while the other end is connected to the power supply output terminal P2, which includes the first input terminal K1 and the second input terminal K2. Specifically, the first input terminal K1 is directly connected to the fifth resistor R6, while the second input terminal K2 is connected to the fifth capacitor C5. It is worth noting that the fifth resistor R6 and the sixth resistor R7 play a crucial role in this circuit. They serve as current-limiting resistors for the LED lamp, effectively preventing damage to the LED lamp due to excessive current.

[0038] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above implementation. Technical personnel familiar with the field can also make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A control circuit for a stereo microscope, characterized in that: The control circuit includes a power supply input terminal, a mechanical switch, a boost chip and a power supply output terminal connected in sequence. The power supply input terminal is externally connected to a battery pack. The control circuit also includes a first diode element, an adjustment resistor and a second diode element. The two ends of the first diode element are respectively connected to the power supply input terminal and the mechanical switch. The boost chip includes a first pin and a second pin. The second diode element is connected to the first pin. The adjustment resistor is connected to the second pin. The power supply output terminal is connected to an LED lamp.

2. The control circuit according to claim 1, wherein: The control circuit further includes a first capacitor and a second capacitor, wherein the first capacitor and the second capacitor are both connected in parallel with the first diode element.

3. The control circuit according to claim 2, characterized in that: A first resistor and a second resistor are respectively connected in series between the regulating resistor and the boost chip. The regulating resistor includes a first terminal and a second terminal. The first terminal is connected to the first resistor, the second terminal is connected to the second resistor, and the first resistor and the second resistor are connected.

4. The control circuit according to claim 3, characterized in that: The control circuit further includes a third resistor, a fourth resistor, and a third capacitor connected in parallel. One end of the third resistor is connected to the second diode element, and the other end of the third resistor is connected to the second resistor.

5. The control circuit according to claim 3, characterized in that: The control circuit further includes an inductor element, which is connected in parallel with the boost chip.

6. The control circuit according to claim 5, characterized in that: The boost chip includes a third pin and a fourth pin. One end of the inductor is connected to the third pin and the fourth pin respectively, and the other end is connected to the first pin.

7. The control circuit according to claim 4, characterized in that: The control circuit further includes a fourth capacitor and a fifth capacitor connected in parallel, wherein one end of the fourth capacitor is connected to the third capacitor and the other end is grounded.

8. The control circuit according to claim 7, characterized in that: The control circuit further includes a fifth resistor and a sixth resistor connected in parallel, one end of the fifth resistor is connected to the fifth capacitor, and the other end of the fifth resistor is connected to the power output end.

9. The control circuit according to claim 8, characterized in that: The power supply output end includes a first input end and a second input end, the first input end is connected to the fifth resistor, and the second input end is connected to the fifth capacitor.

10. The control circuit according to claim 1, wherein: The resistance adjustment range of the adjustment resistor is 0 to 10,000 ohms.

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