CN2053773U

CN2053773U - Bacterial colony counter

Info

Publication number: CN2053773U
Application number: CN89206283.5U
Authority: CN
Inventors: 马宗超
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-04-26
Filing date: 1989-04-26
Publication date: 1990-02-28

Abstract

The utility model relates to a bacterial colony counter used for testing the bacterial number contained in the foods, the medicine, etc. The utility model comprises a probe pen, a counting device, a digital display and a bacterial colony lighting part. The utility model is characterized in that the decimal three-position CMOS integrated circuit counter is designed according to the national testing protocol; a microswitch used to mark and simultaneously trigger the counting is positioned at the tail of the sleeve of the probe pen, and the data are displayed via a digitron. The utility model adopts a circular fluorescent lamp which sideways and clearly illuminates the colonies, realizes the hand-marking and the automatic counting and relieves the work intensity of the inspecting personnel. The utility model has the advantages of simple structure and convenient operation.

Description

Bacterial colony counter

The utility model is the instrument about a kind of bacterial detection, specifically relate to a kind of bacterial colony count device that is used for contained bacterial population count check such as food, beverage, medicine, biological products, sanitary sewage, industrial waste water, environmental sample, comprise probe pen, counting, digital display and bacterium colony illumination section.

Existing bacterial colony count method, the double dish that normally will contain sample place the light place, by observing, with wax crayon in the double dish bottom to bacterium colony mark one by one, and the clump count crossed of Tong Shi Summerside note mark.Usually each reviewer of per tour wants continuous counter several, tens even tens double dish, this artificial counting method, and the reviewer must be noted that the power high concentration, labour intensity is big, easily causes personal error.At present still useless in the detection counter of this respect.

The purpose of this utility model is to overcome the weak point of above-mentioned existing bacterial colony count and a kind of bacterial colony count device that includes probe pen, counting, digital display and bacterium colony illumination section is provided, its operation is simple and easy, digital display is clear bright, light is soft, the bacterium colony good contrast is with the labour intensity that alleviates the reviewer, the accuracy that improves check, realization handmarking, automatic counting.

The purpose of this utility model is realized by following scheme:

The utility model comprises parts such as probe pen, counting, digital display and bacterium colony illumination.

According to the national total plate count journey of then establishing rules, the utility model adopts three CMOS integrated circuit countings of the decimal system.

Described probe pen is made up of the pen cap, pen core, nib and microswitch, microswitch is placed on afterbody in the pen cap, its anterior pen core of placing, the break-make of microswitch is by pen core action control, two lead-in wires of switch are drawn from pen cap afterbody, and two switch extension lines connect the count signal input end of counting circuit respectively, and DC voltage provides pulse signal by capacitor C for counting, constitute the discharge loop of capacitor C by resistance R, resistance R is in parallel with capacitor C.

Digital display partly adopts light emitting diode charactron or fluorescent character-display tube.

The utility model bacterium colony illumination section adopts the circline side to penetrate illumination, the double dish of containing sample is placed on the double dish backing in the inboard centre position of circline, the double dish backing adopts optical glass, coordinate scale is carved with on its surface, the fluorescent light outside and bottom thereof are provided with shadow shield, and shadow shield face and instrument bottom interior surface all are coated with unglazed blackboard paint.Between instrument bottom and the backing certain depth is arranged.

The double dish that fills sample is placed on the double dish backing, energized, digital display are zero, and fluorescent light is penetrated illumination to the bacterium colony side, with a probe pen dirt in double dish bottom to bacterium colony mark one by one, the mark while, the nib pressurized will be located pressure by pen core and pass the microswitch that causes pen cap afterbody, switch connection, segment count provides pulse input signal by capacitor C, and the counter triggers counting is shown by charactron; When lifting, pen point pressure disappears, and pen core relies on the elastic reset of microswitch self, and switch disconnects, and the voltage on the capacitor C discharges by resistance R, enters the counting standby condition.The utility model is provided with rest button.

The utlity model has following advantage:

1. the utility model is realized the handmarking, is counted automatically, and operating performance is easy, alleviates reviewer's labour intensity greatly, has reduced personal error, has improved the check accuracy;

2. the utility model combines acquisition of signal and marker pen together, sensitive reliable, simple in structure, easy to use, good looking appearance;

3. the utility model adopts the decimal system three digit counters, not only meets national inspection procedure but also simplify circuit structure, reduces cost, and large-sized luminous charactron clear display is understood;

4. the utility model adopts novel energy-conserving fluorescent light side to penetrate illumination, and at the bottom of the black depth pond, bacterium colony is clear, energy consumption is low.

Fig. 1 is the utility model external form synoptic diagram;

Fig. 2 is the utility model side cross-sectional schematic;

Fig. 3 is the utility model probe pen inner structure synoptic diagram;

Fig. 4 is the utility model counting, digital display partial circuit principle schematic.

Number in the figure: 1 pen cap, 2. pen core, 3. nib, 4. microswitch, 5. circline, 6. double dish backing, 7. double dish, 8. shadow shield, 9. instrument base plate, 10. charactron.

Below in conjunction with accompanying drawing, the utility model is further described by embodiment.

Embodiment:

The utility model partly is made up of probe pen, counting, digital display and bacterial clump, makes power supply with 220 volts of alternating voltages.

With reference to accompanying drawing 3, probe pen is by the pen cap (1), pen core (2), nib (3) and microswitch (4) are formed, two lead-in wires of microswitch (4) are drawn from the pen cap (1) afterbody, one boss is arranged on the front inner wall of the pen cap (1), with and corresponding, front end at pen core (2) has a concave station, this boss matches with concave station, so that the unlikely pen cap (1) that drops out of pen core (2) when nib (3) pressurized, moves behind the pen core (2) and presses microswitch (4), make its connection, when the disappearance of nib (3) pressure, pen core (2) relies on microswitch (4) self elastic reset, and switch disconnects.In the present embodiment, adopt the diaphragm micropump moving switch that declines, probe pen is made by the micropore pen, with the brachymemma of existing micropore pen pen core, at the pen cap afterbody microswitch of packing into, the pen core tail end face after the assembling exactly contacts with the microswitch end face.

The utility model segment count adopts three decimal system CMOS integrated circuit counters, microswitch K ₁(4) two extension lines connect counting trigger pip input end and capacitor C-end respectively, as microswitch K ₁(4) connect, DC voltage provides pulse signal by capacitor C, counter triggers counting, K switch ₁When (4) disconnecting, provide discharge loop by resistance R for capacitor C, button K ₂Be reset switch.

The utility model adopts semiconductor (10) or fluorescent character-display tube to show counting, and the word height is 13mm.

The utility model bacterium colony illumination section circline (5) adopts novel trichromatic energy saving circline or two D fluorescent light side to penetrate illumination, power of lamp tube is 16W, double dish backing (6) is positioned at the inboard centre position of fluorescent light, backing (6) adopts optical glass, 10mm * 10mm grid scale is carved with on its surface, depth between backing (6) and instrument upper surface is decided on double dish (7) height, general double dish height is 16mm, its depth is elected 12mm as, shadow shield (8) is settled in the outside and bottom at fluorescent light (5), shadow shield (8) adopts plastic plate, the unglazed blackboard paint of surface coated, and instrument bottom (9) inside surface also is coated with unglazed blackboard paint.For the ease of observing, the utility model instrument upper surface, promptly the digital display plane of double dish (7) plane, place and charactron all adopts domaticly, and the center depth is 40-60mm between backing (6) and base plate (9).

Claims

1, a kind of bacterial colony count device that is used for contained bacterial population check such as food and drink, medicine, biological products, sewage and environmental sample comprises probe pen, counting, digital display and bacterium colony illumination section, it is characterized in that:

A. described probe pen is made up of the pen cap (1), pen core (2), nib (3) and microswitch (4), and microswitch (4) is placed on the interior afterbody of the pen cap (1), and two lead-in wires of microswitch (4) are drawn from the pen cap (1) afterbody;

B. described segment count adopts three decimal system CMOS integrated circuit; Two lead-in wires of microswitch (4) connect count signal input end and capacitor C one end respectively, and resistance R is in parallel with capacitor C;

C. described digital display partly adopts light emitting diode charactron (10) or fluorescent character-display tube;

D. described bacterium colony illumination section adopts circline (5), double dish backing (6) is positioned at circline (5) middle inside, backing (6) adopts optical flat, the outside and bottom at circline (5) are provided with shadow shield (8), and the inside surface of the surperficial instrument base plate of shadow shield (8) (9) is coated with unglazed blackboard paint.

2, bacterial colony count device as claimed in claim 1 is characterized in that described probe pen adopts the micropore pen, and microswitch (4) adopts the diaphragm type microswitch.

3, bacterial colony count device as claimed in claim 1, the upper surface that it is characterized in that instrument is domatic, the center depth is 40-60mm between backing (6) and base plate (9).

4, bacterial colony count device as claimed in claim 1 is characterized in that described circline (5) is trichromatic energy saving circline or two D fluorescent light, and its power is 16W.