A microbial colony counter

Abstract

The present application relates to the field of microbial detection equipment, and in particular to a microbial colony counter, comprising a body, a mounting groove is provided on the top side of the body, a lighting lamp is installed inside the mounting groove, a light-transmitting plate is installed inside the mounting groove, the light-transmitting plate is located above the lighting lamp, a pressure sensor is installed inside the body, a counter is fixedly installed on one side of the body, the pressure sensor is electrically connected to a comparison module, the comparison module is electrically connected to the counter, the pressure sensor is used to form a pressure signal according to the pressure of the light-transmitting plate and send it to the comparison module, the comparison module is provided with a pressure threshold, the comparison module generates a counting signal according to the pressure threshold and the pressure signal and sends it to the counter, the counter counts according to the counting signal, the comparison module is also electrically connected to an adjustment module, and the adjustment module is used to adjust the pressure threshold set by the comparison module. The present application has the effect of reducing the statistical difficulty of colonies.

Description

Technical Field

[0001] The present application relates to the field of microbial detection equipment, and in particular to a microbial colony counter. Background Art

[0002] A microbial colony counter is a device for detecting the number of colonies and is commonly used in the food, medicine and other industries.

[0003] At present, the relevant counting discloses a microbial colony counter, which includes a body, and a light-emitting area is arranged on the top side of the body. A pressure sensor is installed inside the body, and a counter is fixedly installed on one side of the body. The pressure sensor is electrically connected to a comparison module, and the comparison module is electrically connected to the counter. The pressure sensor is used to form a pressure signal according to the pressure on the light-emitting area and send it to the comparison module, and the comparison module is provided with a pressure threshold. The comparison module generates a counting signal according to the pressure threshold and the pressure signal and sends it to the counter, and the counter counts according to the counting signal. The inspector places the culture dish in the light-emitting area, and the light emitted by the light-emitting area illuminates the culture dish. Then the inspector uses a magnifying glass to find the colonies on the culture dish. After the colonies are found, the inspector clicks on the colonies with a marker pen, thereby increasing the pressure detected by the pressure sensor. When the pressure signal is greater than the pressure threshold, the comparison module sends a counting signal to the counter, thereby increasing the number of colonies counted by the counter by one.

[0004] With respect to the above-mentioned related technologies, the size of the culture dish is not fixed, and the weights of culture dishes of different sizes vary greatly. When the weight of the culture dish decreases, the pressure that needs to be applied to the light-transmitting area when the comparison module outputs the counting signal increases, which makes it easy for the comparison module to fail to output the counting signal after clicking the colony with a marker pen; when the weight of the culture dish increases, the pressure that needs to be applied to the light-transmitting area when the comparison module outputs the counting signal decreases, which makes it easy for the comparison module to mistakenly output the counting signal, thereby increasing the difficulty of colony statistics. Utility Model Content

[0005] In order to reduce the difficulty of counting colonies, the present application provides a microbial colony counter.

[0006] The present application provides a microbial colony counter, which adopts the following technical solution:

[0007] A microbial colony counter comprises a body, a mounting groove is provided on the top side of the body, a lighting lamp is installed inside the mounting groove, a light-transmitting plate is installed inside the mounting groove, the light-transmitting plate is located above the lighting lamp, a pressure sensor is installed inside the body, a counter is fixedly installed on one side of the body, the pressure sensor is electrically connected to a comparison module, the comparison module is electrically connected to the counter, the pressure sensor is used to form a pressure signal according to the pressure exerted on the light-transmitting plate and send it to the comparison module, the comparison module is provided with a pressure threshold, the comparison module generates a counting signal according to the pressure threshold and the pressure signal and sends it to the counter, the counter counts according to the counting signal, the comparison module is also electrically connected to an adjustment module, the adjustment module is used to adjust the pressure threshold set by the comparison module.

[0008] By adopting the above technical solution, the culture dish is placed on the light-transmitting plate, and the lighting lamp is turned on to illuminate the culture dish. Then, the inspector adjusts the pressure threshold through the adjustment module according to the weight of the culture dish, so as to facilitate the adjustment of the pressure that the light-transmitting plate needs to apply when the comparison module outputs the counting signal, thereby reducing the difficulty of colony statistics.

[0009] Optionally, the comparison module includes a comparator IC, a first resistor R1 and a second resistor R2, there are multiple first resistors R1, each of the first resistors R1 has a different resistance value, the output end of the pressure sensor is connected to the positive input end of the comparator IC, one end of each of the first resistors R1 is connected to the adjustment module, the other end of each of the first resistors R1 is connected to one end of the second resistor R2 and the reverse input end of the comparator IC, the other end of the second resistor R2 is connected to the power ground, the output end of the comparator IC is connected to the counter, and the adjustment module is used to select the first resistor R1 to connect to the power supply.

[0010] By adopting the above technical solution, the adjustment module selects different first resistors R1 to be connected to the power supply, so that the comparator IC obtains different pressure thresholds, thereby facilitating the adjustment of the pressure threshold set by the comparison module. When the pressure signal is greater than the pressure threshold, the comparator IC outputs a high level, thereby increasing the count of the counter by one, thereby facilitating the counter to count.

[0011] Optionally, the regulating module includes a variable resistor RB selecting switch K, the selecting switch K having an input end and multiple control ends, the control end of the selecting switch K corresponding to the first resistor R1 one by one, one end of the variable resistor RB is used to connect to the power supply, the other end of the variable resistor RB is connected to the input end of the selecting switch K, and the control end of the selecting switch K is connected to one end of a first resistor R1.

[0012] By adopting the above technical solution, the selection switch K is turned to conveniently select different first resistors R1 to connect to the power supply, thereby conveniently adjusting the pressure threshold set by the comparison module. At the same time, the resistance value of the variable resistor RB is adjusted, so that the detection personnel can further adjust the pressure threshold.

[0013] Optionally, the regulating module further includes a capacitor C, one end of the capacitor C is connected to the output end of the comparator IC, and the other end of the capacitor C is connected to a power ground.

[0014] By adopting the above technical solution, the capacitor C delays the counting signal output by the comparison module, thereby reducing the occurrence of the counter falsely triggering the count increase.

[0015] Optionally, a pressure rod is fixedly installed on the peripheral side of the light-transmitting plate, and the inner side wall of the mounting groove is provided with a through hole for the pressure rod to pass through, the diameter of the through hole is larger than the pressure rod, the pressure rod is pressed against the top side of the pressure sensor, and the light-transmitting plate squeezes the pressure sensor through the pressure rod.

[0016] By adopting the above technical solution, the light-transmitting plate squeezes the pressure sensor through the pressure rod, so that the pressure sensor generates a pressure signal according to the pressure exerted by the light-transmitting plate.

[0017] Optionally, one end of the pressure rod away from the light-transmitting plate is fixedly connected to an elastic rope, a pull plate is provided inside the machine body, one end of the elastic rope away from the pressure rod is fixedly connected to the peripheral side of the pull plate, the elastic force of the elastic rope is used to drive the pull plate to rise, and the pull plate is provided with a driving assembly, and the driving assembly is used to drive the pull plate to descend.

[0018] By adopting the above technical solution, the driving component drives the pull plate to descend, and the elastic rope is stretched, so that the light-transmitting plate is subjected to downward pulling force, thereby reducing the pressure that the light-transmitting plate needs to apply when the comparison module outputs a counting signal. When the driving component is reset, the elastic rope drives the pull plate to rise, thereby increasing the pressure that the light-transmitting plate needs to apply when the comparison module outputs a counting signal. By lifting and lowering the pull plate, it is convenient to adjust the pressure that the light-transmitting plate needs to apply when the comparison module outputs a counting signal.

[0019] Optionally, the driving assembly includes a rotating rod, a rotating block and a driving rod, the rotating block is located outside the machine body, one end of the rotating rod is fixedly connected to the rotating block, the other end of the rotating rod is threaded through the side wall of the machine body, the driving rod is located inside the machine body, one end of the rotating rod away from the rotating block is fixedly connected to one end of the driving rod, the rod body of the driving rod is used to squeeze the top side of the pull plate downward, and the diameter of the driving rod gradually decreases from one end close to the rotating rod to the other end.

[0020] By adopting the above technical solution, the rotating block drives the rotating rod to rotate into the machine body, so that the driving rod squeezes the pull plate to move downward. The rotating block drives the rotating rod to rotate out of the machine body, so that the elastic rope drives the pull plate to move upward.

[0021] Optionally, a pressure block is fixedly mounted in the middle of the top surface of the pull plate, and the rod body of the driving rod abuts against the top side of the pressure block.

[0022] By adopting the above technical solution, the pressure block is pressed by the driving rod, so that it is convenient for the driving rod to apply downward pressure on the middle part of the pull plate.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The pressure threshold set by the comparison module is adjusted through the adjustment module, so as to facilitate the adjustment of the pressure that the light-transmitting plate needs to apply when the comparison module outputs the counting signal, thereby reducing the difficulty of colony statistics;

[0025] 2. The pull plate is driven down by the driving assembly, and the elastic rope is used to drive the pull plate up, so as to facilitate the adjustment of the pressure that the light-transmitting plate needs to apply when the comparison module outputs the counting signal, thereby reducing the difficulty of colony statistics. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0027] Figure 2 yes Figure 1 Sectional view at AA;

[0028] Figure 3 It is a principle block diagram of an embodiment of the present application;

[0029] Figure 4 It is a circuit diagram of an embodiment of the present application.

[0030] Explanation of the accompanying drawings: 1. body; 2. counter; 3. mounting groove; 4. lighting lamp; 5. light-transmitting plate; 6. pressure rod; 7. through hole; 8. pressure sensor; 9. comparison module; 10. adjustment module; 11. elastic rope; 12. pull plate; 13. driving assembly; 131. rotating rod; 132. rotating block; 133. driving rod; 14. pressure block. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] The embodiment of the present application discloses a microbial colony counter 2 .

[0033] Reference Figure 1 , Figure 2A microbial colony counter 2 includes a body 1 and a counter 2 fixedly mounted on one side of the body 1. The top side of the body 1 is recessed to form a mounting groove 3, and a lighting lamp 4 is fixedly mounted inside the mounting groove 3. The lighting lamp 4 is arranged along the inner circumference of the mounting groove 3.

[0034] A light-transmitting plate 5 is arranged inside the installation groove 3, and a pressure rod 6 is fixedly installed around the light-transmitting plate 5. A through hole 7 is provided on the inner wall of the installation groove 3 for the pressure rod 6 to pass through. The interior of the machine body 1 is a hollow structure. After the light-transmitting plate 5 is placed in the installation groove 3, the pressure rod 6 is inserted into the through hole 7 and then bonded to the side of the light-transmitting plate 5. By inserting the pressure rod 6 into the through hole 7, it is convenient to install the light-transmitting plate 5 inside the installation groove 3.

[0035] Reference Figure 1 , Figure 2 , the light-transmitting plate 5 is located above the illuminating lamp 4, and the top surface of the light-transmitting plate 5 is used to place the culture dish. The culture dish is placed on the light-transmitting plate 5, and then the illuminating lamp 4 is turned on. The culture dish is illuminated by the illuminating lamp 4, so as to facilitate the counting of the number of colonies.

[0036] Reference Figure 1 , Figure 2 A pressure sensor 8 is provided inside the body 1. The pressure sensor 8 is annularly fixedly sleeved on the recessed portion of the body 1 forming the mounting groove 3. The pressure rod 6 is pressed against the top side of the pressure sensor 8, and the aperture of the through hole 7 is larger than the diameter of the pressure rod 6. The light-transmitting plate 5 applies pressure to the pressure sensor 8 through the pressure rod 6, so that the pressure sensor 8 forms a pressure signal according to the pressure of the light-transmitting plate 5.

[0037] Reference Figure 3 , Figure 4 The pressure sensor 8 is electrically connected to a comparison module 9, the comparison module 9 is electrically connected to an adjustment module 10, and the comparison module 9 is electrically connected to the counter 2. The body 1 has a PCB board inside, and the comparison module 9 and the adjustment module 10 are integrated on the PCB board.

[0038] The comparison module 9 includes a comparator IC, a first resistor R1 and a second resistor R2. The adjustment module 10 includes a capacitor C, a variable resistor RB and a selection switch K. There are multiple first resistors R1, and each first resistor R1 has a different resistance value. The selection switch K has an input terminal and multiple control terminals, and the first resistors R1 correspond to the control terminals of the selection switch K one by one.

[0039] Reference Figure 3 , Figure 4, the output end of the pressure sensor 8 is connected to the positive input end of the comparator IC. The input end of the selection switch K is used to access the power supply. One end of each first resistor R1 is electrically connected to a control end of the selection switch K, and the other end of each first resistor R1 is connected to one end of the second resistor R2 and the reverse input end of the comparator IC. The other end of the second resistor R2 is connected to the power ground. The output end of the comparator IC is connected to the counter 2 and one end of the capacitor C, and the other end of the capacitor C is connected to the power ground.

[0040] Reference Figure 3 , Figure 4 The first resistor R1 and the second resistor divide the power supply voltage to form a pressure threshold. When the resistance of the variable resistor RB is set to zero, the resistance of each first resistor R1 is set according to the weight of a commonly used culture dish and the strength of using a marker to click on the colony, thereby forming multiple pressure thresholds.

[0041] When counting the number of colonies, if it is a culture dish of a commonly used size, set the variable resistor RB to zero, and then turn the selection switch K to let the selection switch K select the corresponding pressure threshold, thereby reducing the time for adjusting the pressure threshold. If it is a culture dish of an uncommon size, adjust the resistance value of the variable resistor RB to facilitate changing the pressure threshold. The adjustable pressure threshold facilitates adjustment of the pressure that the light-transmitting plate 5 needs to apply when the comparison module 9 outputs a counting signal, thereby reducing the difficulty of counting the colonies.

[0042] The culture dish is placed on the light-transmitting plate 5, and the inspector uses a marker to click on the colonies on the culture dish, thereby increasing the pressure applied by the light-transmitting plate 5 to the pressure sensor 8, thereby increasing the pressure signal output by the pressure sensor 8. The pressure sensor 8 inputs the pressure signal to the positive input terminal of the comparator IC. When the pressure signal is greater than the pressure threshold, the comparator IC outputs a high-level signal, which is the counting signal. The counting signal is delayed by the capacitor C and input to the counter 2, thereby increasing the count of the counter 2 by one.

[0043] Reference Figure 1 , Figure 2 The end of the pressure rod 6 away from the light-transmitting plate 5 is fixedly connected with an elastic rope 11. A pull plate 12 is provided inside the machine body 1, and the pull plate 12 is located below the pressure sensor 8. The end of the elastic rope 11 away from the pressure rod 6 is connected to the peripheral side of the pull plate 12. The elastic rope 11 is used to apply an upward pulling force to the pull plate 12.

[0044] The pull plate 12 is provided with a driving assembly 13, and the driving assembly 13 includes a rotating rod 131, a rotating block 132 and a driving rod 133. The rotating block 132 is located outside the body 1, one end of the rotating rod 131 is fixedly connected to the rotating block 132, and the other end of the rotating rod 131 is threadedly penetrated through the side wall of the body 1. The driving rod 133 is located inside the body 1, and one end of the rotating rod 131 away from the rotating block 132 is fixedly connected to one end of the driving rod 133. A pressure block 14 is fixedly installed in the middle of the top surface of the pull plate 12, and the rod body of the driving rod 133 abuts against the top side of the pressure block 14. The diameter of the driving rod 133 gradually decreases from one end close to the rotating rod 131 to the other end. The driving rod 133 applies downward pressure to the pull plate 12 through the pressure block 14.

[0045] Reference Figure 1 , Figure 2 , rotate the rotating block 132 to rotate the rotating rod 131 into the machine body 1, so that the driving rod 133 squeezes the pull plate 12 to move downward, thereby reducing the pressure that the light-transmitting plate 5 needs to apply when the comparison module 9 outputs a counting signal. Rotate the rotating block 132 to rotate the rotating rod 131 out of the machine body 1, so that the elastic rope 11 drives the pull plate 12 to move upward, thereby increasing the pressure that the light-transmitting plate 5 needs to apply when the comparison module 9 outputs a counting signal. By rotating the rotating block 132 to adjust the pressure that the light-transmitting plate 5 needs to apply when the comparison module 9 outputs a counting signal, it is convenient to adjust when the selection switch K fails.

[0046] The implementation principle of a microbial colony counter 2 in the embodiment of the present application is: the pressure threshold is adjusted by the regulating module 10, thereby adjusting the pressure that the light-transmitting plate 5 needs to apply when the comparison module 9 outputs a counting signal, thereby reducing the difficulty of colony statistics.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A microbial colony counter (2), characterized in that: The invention comprises a body (1), wherein a mounting groove (3) is provided on the top side of the body (1), a lighting lamp (4) is installed inside the mounting groove (3), a light-transmitting plate (5) is installed inside the mounting groove (3), and the light-transmitting plate (5) is located above the lighting lamp (4); a pressure sensor (8) is installed inside the body (1), and a counter (2) is fixedly installed on one side of the body (1); the pressure sensor (8) is electrically connected to a comparison module (9), and the comparison module (9) is electrically connected to the counter (2); the pressure sensor (8) is used to form a pressure signal according to the pressure of the light-transmitting plate (5) and send it to the comparison module (9); the comparison module (9) is provided with a pressure threshold; the comparison module (9) generates a counting signal according to the pressure threshold and the pressure signal and sends it to the counter (2); the counter (2) counts according to the counting signal; the comparison module (9) is also electrically connected to an adjustment module (10), and the adjustment module (10) is used to adjust the pressure threshold set by the comparison module (9).

2. A microbial colony counter (2) according to claim 1, characterized in that: The comparison module (9) comprises a comparator IC, a first resistor R1 and a second resistor R2, there are a plurality of first resistors R1, each of which has a different resistance value, the output end of the pressure sensor (8) is connected to the positive input end of the comparator IC, one end of each of the first resistors R1 is connected to the adjustment module (10), the other end of each of the first resistors R1 is connected to one end of the second resistor R2 and the reverse input end of the comparator IC, the other end of the second resistor R2 is connected to the power ground, the output end of the comparator IC is connected to the counter (2), and the adjustment module (10) is used to select the first resistor R1 to be connected to the power supply.

3. A microbial colony counter (2) according to claim 2, characterized in that: The regulating module (10) comprises a variable resistor RB and a selection switch K, wherein the selection switch K has an input end and a plurality of control ends, the control ends of the selection switch K correspond one-to-one to the first resistor R1, one end of the variable resistor RB is used to connect to a power supply, the other end of the variable resistor RB is connected to the input end of the selection switch K, and the control end of the selection switch K is connected to one end of a first resistor R1.

4. A microbial colony counter (2) according to claim 3, characterized in that: The regulating module (10) further comprises a capacitor C, one end of the capacitor C is connected to the output end of the comparator IC, and the other end of the capacitor C is connected to the power ground.

5. A microbial colony counter (2) according to claim 1, characterized in that: A pressure rod (6) is fixedly mounted on the peripheral side of the light-transmitting plate (5); a through hole (7) for the pressure rod (6) to pass through is formed on the inner side wall of the mounting groove (3); the diameter of the through hole (7) is larger than the pressure rod (6); the pressure rod (6) is pressed against the top side of the pressure sensor (8); and the light-transmitting plate (5) presses the pressure sensor (8) through the pressure rod (6).

6. A microbial colony counter (2) according to claim 5, characterized in that: An end of the pressure rod (6) away from the light-transmitting plate (5) is fixedly connected to an elastic rope (11); a pull plate (12) is provided inside the machine body (1); an end of the elastic rope (11) away from the pressure rod (6) is fixedly connected to the peripheral side of the pull plate (12); the elastic force of the elastic rope (11) is used to drive the pull plate (12) to rise; the pull plate (12) is provided with a driving assembly (13); the driving assembly (13) is used to drive the pull plate (12) to descend.

7. A microbial colony counter (2) according to claim 6, characterized in that: The driving assembly (13) comprises a rotating rod (131), a rotating block (132) and a driving rod (133); the rotating block (132) is located outside the machine body (1); one end of the rotating rod (131) is fixedly connected to the rotating block (132); the other end of the rotating rod (131) is threadedly penetrated through the side wall of the machine body (1); the driving rod (133) is located inside the machine body (1); one end of the rotating rod (131) away from the rotating block (132) is fixedly connected to one end of the driving rod (133); the rod body of the driving rod (133) is used to press the top side of the pull plate (12) downward; the diameter of the driving rod (133) gradually decreases from one end close to the rotating rod (131) to the other end.

8. A microbial colony counter (2) according to claim 7, characterized in that: A pressure block (14) is fixedly mounted in the middle of the top surface of the pull plate (12), and the rod body of the driving rod (133) abuts against the top side of the pressure block (14).

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