CN108572203A - A Portable Meat Detector - Google Patents

Abstract

The present invention provides a kind of portable rotten apparatus for investigating meat, belong to technical field of food detection.It solves the problems such as existing meat quality detection device frequently replaces battery.This detector includes detector ontology, capacitive reactance detecting element is provided on detector ontology, sampler, A/D converter, microprocessor, memory, key cell, touch display screen and the supply unit powered to each consuming parts, capacitive reactance detecting element is connect with sampler, the invention also includes multi wave length illuminating source and pattern collecting units, pattern collecting unit is connect with above-mentioned microprocessor, pattern collecting unit is for acquiring analog image information, and microprocessor is transmitted a signal to by A/D converter, by metric attribute include in touch display screen after microprocessor calculation process.The energy sources of this detector can automatically switch in two power supplys, and per task, and at every moment total power supply there are one in not reusing is voluntarily charged by solar energy, and using effect is fabulous.

Description

A Portable Meat Detector

technical field

The invention belongs to the technical field of food detection and relates to a portable deteriorating meat detector.

Background technique

In the daily diet, meat is a common dish on people's table, such as pork, beef, mutton or other meat, etc. People obtain the protein needed for life activities by ingesting the fat in meat, so as to maintain normal life activities. Therefore, the quality of meat quality is not only related to the taste of eating, but also endangers people's health.

According to incomplete statistics, the daily trading volume of meat is measured in tons, and it occupies a relatively large market share in the farmers' market. The huge economic benefits have stimulated the nerves of some people. Huge profits, as small as adding water to the meat to increase the weight, as large as using chemicals to keep the meat fresh, this practice not only disrupts the normal transaction order, but also brings deception to consumers. Therefore, whether it is possible to buy fresh meat Class is already the most concerned issue for consumers today.

The sensory inspection of existing meat is very necessary. The Soviet Union divided the freshness of meat into three grades, namely fresh meat, suspicious fresh meat and stale meat. my country has also formulated sensory quality standards for fresh pork, beef and mutton, chicken and duck meat, etc. The index divides fresh meat into first-level freshness and second-level freshness. Suspicious fresh meat and second-grade fresh meat are difficult to be directly identified sensory, but it is not difficult to detect it using rapid biochemical detection methods.

In the prior art, there have also appeared many detection devices for detecting spoiled meat products, but the existing meat detection devices have complex and bulky structures, and are generally used together with computers, which are not convenient for people to carry. In addition, these devices are due to It is used frequently all day long, consumes a lot of power, and needs to be replaced or charged frequently, and some meat stalls on the roadside may not be equipped with charging ports to charge such devices, so the usability is not high.

Contents of the invention

The purpose of the present invention is to solve the problems that the existing meat quality detection device is inconvenient to carry and frequent battery replacement and charging is very cumbersome, and proposes a portable deteriorating meat detector that is easy to carry, can quickly detect whether the meat is fresh, and is easy to use. class detector.

The purpose of the present invention can be achieved through the following technical solutions:

A portable deteriorating meat detector is characterized in that it includes a detector body, which is provided with a capacitive reactance detection element capable of measuring the capacitive reactance value of meat, a sampler, an analog/digital converter, a microprocessor Device, memory, key control unit, touch display screen and power supply device for supplying power to various electrical components, the capacitive reactance detection element is connected to the sampler, the sampler is connected to the analog/digital converter, and the analog/digital converter is connected to the microprocessor Connected, the capacitive reactance detection element measures the capacitive reactance value of the meat, after being sampled and held by the sampler, it is sent to the microprocessor through the analog/digital converter, and the result is displayed on the touch screen after comparing with the capacitive reactance standard value in the memory It shows that the detector also includes a multi-wavelength light source and a pattern acquisition unit arranged on the detector body, the pattern acquisition unit is connected to the above-mentioned microprocessor, the multi-wavelength light source provides a stable light source of a specific wavelength for the detector, and the pattern acquisition unit It is used to collect analog image information, and transmit the signal to the microprocessor through the analog/digital converter, and the microprocessor will display the quality attributes on the touch screen after operation and processing. The key control unit is a man-machine exchange interface, including relevant operation buttons of the detector.

Preferably, the capacitive reactance detection element includes a capacitive probe, and the capacitive probe includes a steel needle tube, an insulating material sheath, a conductor and an insulating layer.

Preferably, the power supply unit includes a first power supply and a second power supply, the first power supply and the second power supply can independently form a loop and independently supply power to each electric component on the detector body, and the first power supply and the second power supply are both It is a rechargeable power source, all of which are externally connected with solar power generating devices.

Preferably, the first power supply includes a housing with an inner cavity, two first wires and two first connection contacts arranged on the corresponding first wires, and the first connection contacts are arranged below There is a lifting metal plate, and two lifting contacts corresponding to the first connecting contacts are arranged at intervals on the lifting metal plate, and the two first connecting contacts can contact the corresponding lifting contacts respectively.

The lifting contacts are vertically arranged on the lifting metal plate, and the two ends of the two lifting contacts are respectively located on both sides (upper and lower sides) of the lifting metal plate.

One end of the two first wires connected with the first connection contact is located in the inner cavity of the housing, and the other end is drawn from the lower opening of the housing to connect with the above-mentioned electrical components (such as capacitive reactance detection element, sampler, mold/ digital converter, microprocessor, memory, key control unit, touch display screen, multi-wavelength light source and pattern acquisition unit, etc.), when the two first connecting contacts and the two lifting contacts are connected in corresponding contact , the circuit loop of the first power supply is connected, at this time, only need to press the corresponding switch button, the first power supply can work to supply power to the detector, and the detector works.

Preferably, the second power supply includes two second wires and second connection contacts arranged on each second wire corresponding to the two lifting contacts one by one, and the two second connection contacts are arranged on the above-mentioned Below the lifting contacts, the detector also includes a switching mechanism for the first power supply and the second power supply. Under the action of the switching mechanism, the two lifting contacts can be connected with the corresponding second connecting contacts.

At the beginning, the upper ends of the two lifting contacts are connected to the first connecting contact, and at this time the first circuit of the first power supply is connected; after the two lifting contacts are lowered, the lower ends of the two lifting contacts are connected to The second connecting contact contacts, the first circuit is interrupted, and the second circuit of the second power source is connected.

The two second wires are located between the two first wires, one end of the two second wires connected to the second connection contact is located in the inner cavity of the housing, and the lower ends of the two second wires are drawn out from the bottom of the housing, Connect with the detector's electrical components.

After the two lifting contacts are connected with the corresponding second connecting contacts, the second power supply is connected, and after pressing the corresponding power switch, the second power supply supplies power to the detector, and the detector starts to work.

Preferably, the switching mechanism includes a lifting button, a self-locking block, a lifting piece and a lifting drive mechanism arranged on the housing from top to bottom, the lifting metal plate is horizontally arranged on the upper end of the lifting piece, and the lifting piece A lifting spring is arranged between the lower end and the bottom of the housing. The lifting button includes a button body and a button head arranged on the button body. An opening is provided at the upper end of the housing. The button body is vertically inserted into the opening into the inner cavity of the housing. The lower end is provided with a guide slope, the self-locking block is located between the lifting button and the lifting piece, and the upper and lower ends of the self-locking block are always in contact with the lower end of the button body and the upper end of the lifting piece, and the lifting drive mechanism can drive the lifting button downward. Movement, so that the lifting contact on the lifting metal plate is in contact with the corresponding second connecting contact. There is a lifting button between the self-locking block and the housing. After pressing down, the lifting contact and the second connecting contact are always in contact with each other. self-locking structure.

The lifting drive mechanism drives the lifting button down. When the lifting contact is in contact with the corresponding second connecting contact, the self-locking block is locked with the housing through the self-locking structure, so that the lifting contact is always in contact with the second connecting contact. , when the lifting drive mechanism is reset and the self-locking block is unlocked, the lifting member returns under the action of the lifting spring, driving the self-locking block and the lifting button to return. At this time, the lifting contact is connected to the corresponding first connecting contact .

Preferably, the lifting drive mechanism includes a button switch arranged outside the detector body, a sliding rod is arranged horizontally at the inner end of the button switch, a pressing protrusion is vertically arranged on the sliding rod, and the lower end of the pressing protrusion is arranged There is an arc surface, and the button head of the lifting button is provided with a rounded corner that matches the lower end of the extrusion protrusion. After the sliding rod moves horizontally under the drive of the button switch, the arc surface of the extrusion protrusion moves along the bottom of the button head. The rounding movement makes the lifting button move downward, and the lifting drive mechanism also includes a return mechanism of the sliding rod. The return mechanism includes a return spring, one end of the return spring is connected with the sliding rod, and the other end is connected with the detector body.

After the arc surface at the lower end of the extrusion protrusion contacts the rounded corner on the button head, when the sliding rod continues to move away from the button switch, the extrusion protrusion continues to slide along the rounded corner on the button head to drive the lifting Button moves down.

Preferably, the self-locking structure includes a hook arranged on the side of the self-locking block, two limiting plates are arranged at the opening of the housing, the self-locking block is located between the two limiting plates, and the self-locking block The upper and lower ends are arc-shaped. The self-locking block can swing left and right with the contact point of the lifting piece as the fulcrum. The lower ends of the two limit plates are provided with convex edges, and the two convex edges are on the same horizontal plane. And set opposite to each other, during the downward movement of the self-locking block, the hooks arranged on one side of the self-locking block can be hooked on the convex edge of the corresponding side limit plate.

Compared with the prior art, the detector has the following beneficial effects: through capacitive reactance detection element, sampler, multi-wavelength light source, pattern acquisition unit, analog/digital converter, microprocessor, memory, key control unit and touch display The setting of the screen can quickly identify whether the meat to be inspected is fresh or not. This detector is small in size and easy to carry; the energy comes from two power sources, and each work can be automatically switched, and there is always one that is not in use at all times. The power supply is self-charging through solar energy, and the use effect is excellent.

Description of drawings

Fig. 1 is the external structure schematic diagram of this detector;

Fig. 2 is the rendering of the detector using the first power supply;

Fig. 3 is the effect diagram that this detector adopts the second power supply to supply energy;

Fig. 4 is a schematic diagram of the connection structure of various components inside the detector.

In the figure, 1. Detector body; 2. Detection switch; 3. Slide rod; 4. Return spring; 5. Squeeze protrusion; 6. Housing; Contact; 10, first connecting contact; 11, second connecting contact; 12, lifting spring; 13, return spring; 14, hook; 15, convex edge; 16, self-locking block.

Detailed ways

The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

As shown in Figures 1 and 4, a portable deteriorating meat detector includes a detector body 1, and the detector body 1 is provided with a capacitive reactance detection element capable of measuring the capacitive reactance value of meat, a sampler, a mold/ Digital converter, microprocessor, memory, key control unit, touch display screen and power supply device for supplying power to various electrical components.

The capacitive reactance detection element is connected with the sampler, the sampler is connected with the analog/digital converter, and the analog/digital converter is connected with the microprocessor. The analog/digital converter is sent to the microprocessor, and the result is displayed on the touch screen after comparing with the capacitive reactance standard value in the memory.

The present invention also includes a multi-wavelength light source and a pattern acquisition unit arranged on the detector body 1, the pattern acquisition unit (camera) is connected with the above-mentioned microprocessor, the multi-wavelength light source provides a stable light source of a specific wavelength for the detector, and the pattern acquisition unit uses It is used to collect analog image information, and transmit the signal to the microprocessor through the analog/digital converter, and the microprocessor will display the quality attributes on the touch screen after processing. The key control unit is a man-machine exchange interface, including relevant operation buttons of the detector. The capacitive reactance detection element of the present invention includes a capacitance probe, and the capacitance probe includes a steel needle tube, an insulating material sleeve, a conductor and an insulating layer.

As shown in Figures 2-3, the detector body 1 is provided with a detection switch 2, and each time the detection switch 2 is turned on, the detector will perform a detection operation. A slide bar 3 is connected, and one end of the slide bar 3 is connected with the inner end of the button switch, and the other end is aimed at the detection switch 2 .

After the sliding rod 3 moves, it can touch the detection switch 2. A return spring 4 is connected between the sliding rod 3 and the detector body 1, which can make the sliding rod 3 return to its original position. 5, the extrusion protrusion 5 has rounded corners.

The first power supply includes a housing 6 with an inner cavity, two first wires and two first connection contacts 10 arranged on the corresponding first wires, and a lifting metal is arranged below the first connection contacts 10. Two lifting contacts 9 corresponding to the first connecting contacts 10 are arranged at intervals on the lifting metal plate, and the two first connecting contacts 10 can contact the corresponding lifting contacts 9 respectively.

The lifting contacts 9 are vertically arranged on the lifting metal plate, and the two ends of the two lifting contacts 9 are respectively located on both sides (upper and lower sides) of the lifting metal plate.

One end of the two first wires connected with the first connection contact 10 is located in the inner chamber of the housing 6, and the other end is drawn from the lower opening of the housing 6 to connect with the above-mentioned electrical components (such as capacitive reactance detection element, sampler, etc.) , analog/digital converter, microprocessor, memory, key control unit, touch display screen, multi-wavelength light source and pattern acquisition unit, etc.) connection, when the two first connection contacts 10 are in corresponding contact with the two lifting contacts 9 When they are connected together, the circuit of the first power supply is connected. At this time, only need to press the corresponding switch button, the first power supply can work to supply power to the detector, and the detector works.

The second power supply includes two second wires and the second connection contacts 11 corresponding to the two lifting contacts 9 on each second wire, and the two second connection contacts 11 are arranged on the above-mentioned lifting contacts. 9, the detector also includes a switching mechanism for the first power supply and the second power supply. Under the action of the switching mechanism, the two lifting contacts 9 can be connected with the corresponding second connecting contacts 11.

The two first connection contacts 10 are located on the power supply line of the first power supply, and the two second connection contacts 11 are located on the power supply line of the second power supply. Return to the return spring 13 of the highest position under the situation of no external force.

At the beginning, the upper ends of the two lifting contacts 9 were connected with the first connecting contact 10, and the first circuit of the first power supply was connected at this time; after the two lifting contacts 9 descended, the two lifting contacts The lower end of 9 is in contact with the second connection contact 11, the first circuit is interrupted, and the second circuit of the second power supply is connected.

Two second wires are located between the two first wires, and one end of the two second wires connected to the second connection contact 11 is located in the inner chamber of the housing 6, and the lower ends of the two second wires are connected from the housing 6. Lead out from the bottom and connect with the electrical parts of the detector.

After the two lifting contacts 9 are connected to the corresponding second connecting contacts 11, the second power circuit is connected, and after pressing the corresponding power switch, the second power supply supplies power to the detector, and the detector starts to work.

The switching mechanism includes a lifting button 7 , a self-locking block 16 , a lifting member 8 and a lifting drive mechanism for the lifting button 7 arranged on the housing 6 from top to bottom. The lifting member 8 is arranged in the inner cavity, and the lower end of the lifting button 7 is inserted into the inner cavity and can drive the lifting member 8 to move up and down.

The lifting metal plate is horizontally arranged on the upper end of the lifting member 8, and a lifting spring 12 is arranged between the lower end of the lifting member 8 and the bottom of the housing 6. The lifting button 7 includes a button body and a button head arranged on the button body. The upper end is provided with an opening, the button body is vertically inserted into the opening into the inner cavity of the housing 6, the lower end of the button body is provided with a guide slope, the self-locking block 16 is located between the lifting button 7 and the lifting member 8 and the upper and lower sides of the self-locking block 16 The lower end of the button body and the upper end of the lifting member 8 are always in contact with each other, and the lifting drive mechanism can drive the lifting button 7 to move downward, so that the lifting contact 9 on the lifting metal plate is in contact with the corresponding second connecting contact 11. Connection, between the self-locking block 16 and the housing 6, there is a self-locking structure that keeps the lifting contact 9 and the second connecting contact 11 in contact with each other after the lifting button 7 is pressed down.

The lifting drive mechanism drives the lifting button 7 to descend. When the lifting contact 9 is in contact with the corresponding second connecting contact 11, the self-locking block 16 is locked with the housing 6 through the self-locking structure, so that the lifting contact 9 is connected to the second connecting contact 11. The connecting contact 11 is always in contact with the connection. When the lifting drive mechanism is reset and the self-locking block 16 is unlocked, the lifting member 8 returns under the action of the lifting spring 12, driving the self-locking block 16 and the lifting button 7 to return. At this time, the lifting The contacts 9 are in turn connected to corresponding first connection contacts 10 .

The lifting drive mechanism includes a button switch arranged on the outside of the detector body 1. A slide bar 3 is arranged horizontally at the inner end of the button switch. An extruding protrusion 5 is vertically arranged on the sliding bar 3. The lower end of the extruding protrusion 5 is provided with a On the arc surface, the button head of the lifting button 7 is provided with a rounded corner that matches the lower end of the extrusion protrusion 5. After the slide bar 3 moves horizontally under the push button switch, the arc surface of the extrusion protrusion 5 moves along the The rounding movement of the button head makes the lift button 7 move downward, and the lift drive mechanism also includes a return mechanism of the slide rod 3 . The return mechanism includes a return spring 4 , one end of the return spring 4 is connected to the sliding rod 3 , and the other end is connected to the detector body 1 .

After the arc surface at the lower end of the extrusion protrusion 5 contacts the rounded corner on the button head, when the sliding rod 3 continues to move away from the button switch, the extrusion protrusion 5 continues to slide along the rounded corner on the button head , to the arc groove on the button head, driving the lifting button 7 to move downward.

The self-locking structure includes the grab hook 14 that is arranged on the side of the self-locking block 16, and the opening of the housing 6 is provided with two spacer plates, and the above-mentioned self-locking block 16 is located between the two spacer plates, and on the self-locking block 16 , The lower ends are arc-shaped, and the self-locking block 16 can swing left and right with the contact point in contact with the lifting member 8 as the fulcrum. The lower ends of the two limit plates are provided with convex edges 15, and the two convex edges 15 are in the They are arranged on the same horizontal plane and opposite to each other. During the downward movement of the self-locking block 16 , the hook 14 provided on one side of the self-locking block 16 can be hooked on the convex edge 15 of the corresponding side limit plate.

Originally, as shown in FIG. 2 , the lifting contact 9 forms a circuit with the first connecting contact 10 , so each component in the detector is powered by the first power supply. When people click the button switch, the slide bar 3 touches the detection switch 2 to make the detector work once, but this detection uses the second power supply to provide energy. The reason is as follows: after the slide bar 3 slides, the extrusion convex Lift 5 to move, and press down the lifting button 7, and indirectly press the self-locking block 16 and the lifting part 8 below the self-locking block 16 to make them all move down, as shown in Figure 3. At this time, the lifting part 8 moves down and then lifts The contact 9 is connected with the second connection contact 11 to form a loop, and the second connection contact 11 will continue to move down a part distance under the action of the return spring 13, and at this time, the self-locking block 16 is under gravity and has an inclined surface. Under the influence of the lifting button 7, it falls to the left. When the sliding rod 3 returns to the original position under the action of the return spring 4, the second connection contact 11 moves upward under the action of the return spring 13, and the lifting member 8 also moves upward under the action of the return spring 4. 12 moves up, but because the hook 14 on the side of the self-locking block 16 is just stuck on the convex edge 15 on the inner wall of the inner cavity, so the self-locking block 16 will no longer be able to move up, and then the lifting contact 9 It is still connected with the second connecting contact 11 to form a loop. When people click the button switch again, the slope of the lifting button 7 will extrude the top left side of the self-locking block 16, making it topple over to the right, and then the grab 14 on the side of the self-locking block 16 is just in contact with the protrusion on the inner wall of the cavity. Separate along 15, at this time, the self-locking block 16 will return to the position in FIG. 2 under the action of the lifting spring 12, so that the lifting contact 9 and the first connecting contact 10 form a loop again. Therefore, every time the detector is started to work in the present invention, the power source used by each power-consuming part in the whole detector will be switched once. When the second power supply is working, the first power supply can absorb solar energy for charging, and the two power supplies can be switched back and forth so that the detector does not need to be charged or replaced, and the use effect is excellent.

It should be understood that in the claims and description of the present invention, all "comprising..." should be understood as an open meaning, that is, its meaning is equivalent to "at least containing...", and should not be understood as a closed Meaning, that is, its meaning should not be understood as "contains only...".

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Claims (8)

1. A portable deteriorating meat detector is characterized in that it comprises a detector body (1), and the detector body (1) is provided with a capacitive reactance detection element, a sampler, and a meat capacitive reactance value that can be measured. Analog/digital converter, microprocessor, memory, key control unit, touch display screen and power supply device for supplying power to various electrical components, the capacitive reactance detection element is connected to the sampler, the sampler is connected to the analog/digital converter, and the analog The /digital converter is connected with the microprocessor, and the capacitive reactance detection element measures the capacitive reactance value of the meat. After being sampled and held by the sampler, it is sent to the microprocessor through the analog/digital converter, and compared with the standard value of capacitive reactance in the memory. After the result is displayed on the touch screen, the detector also includes a multi-wavelength light source and a pattern acquisition unit arranged on the detector body (1), the pattern acquisition unit is connected with the above-mentioned microprocessor, and the multi-wavelength light source is used for detecting The detector provides a stable light source with a specific wavelength, and the pattern acquisition unit is used to collect analog image information, and transmit the signal to the microprocessor through the analog/digital converter, and the microprocessor will display the quality attributes on the touch screen after processing. 2. A portable deteriorating meat detector according to claim 1, wherein the capacitive reactance detection element comprises a capacitive probe, and the capacitive probe comprises a steel needle tube, an insulating material cover, a conductor and insulating layer. 3. A portable deteriorating meat detector according to claim 1 or 2, characterized in that, the power supply unit includes a first power supply and a second power supply, the first power supply and the second power supply can form a loop independently and Independently supply power to each electric component on the detector body (1), the first power supply and the second power supply are both rechargeable power supplies, both of which are externally connected with solar power generating devices. 4. A portable deteriorating meat detector according to claim 3, characterized in that the first power supply includes a housing (6) with an inner cavity, two first wires and Two first connecting contacts (10) on a wire, a lifting metal plate is arranged below the first connecting contact (10), and two connecting contacts (10) are arranged at intervals on the lifting metal plate. ) one-to-one corresponding lifting contacts (9), and the two first connecting contacts (10) can contact the corresponding lifting contacts (9) respectively. 5. A kind of portable spoilage meat detector according to claim 3, is characterized in that, described second power supply comprises two second lead wires and is arranged on each second lead wire and two lifting contacts ( 9) One-to-one corresponding second connection contacts (11), the two second connection contacts (11) are arranged below the lifting contact (9), and the detector also includes a first power supply and a second The switching mechanism of the power supply, under the action of the switching mechanism, the two lifting contacts (9) can be connected with the corresponding second connecting contacts (11). 6. A portable deteriorating meat detector according to claim 5, characterized in that, the switching mechanism includes a lifting button (7) arranged on the casing (6) from top to bottom, a self-locking block (16), the lifting drive mechanism of the lifting piece (8) and the lifting button (7), the lifting metal plate is horizontally arranged on the upper end of the lifting piece (8), between the lower end of the lifting piece (8) and the bottom of the housing (6) A lifting spring (12) is provided. The lifting button (7) includes a button body and a button head arranged on the button body. The upper end of the casing (6) is provided with an opening, and the button body is vertically inserted into the opening into the casing (6) In the cavity, the lower end of the button body is provided with a guide slope, and the self-locking block (16) is located between the lifting button (7) and the lifting piece (8) and the upper and lower ends of the self-locking block (16) are respectively connected to the lower end of the button body and the lower end of the button body. The upper end of the lifting member (8) is always in contact with each other, and the lifting drive mechanism can drive the lifting button (7) to move downward, so that the lifting contact (9) on the lifting metal plate contacts the corresponding second connecting contact (11) Connection, a self-locking structure is provided between the self-locking block (16) and the housing (6) to keep the lifting contact (9) and the second connecting contact (11) in contact with each other after the lifting button (7) is pressed down. 7. A portable deteriorating meat detector according to claim 6, characterized in that the lifting drive mechanism includes a button switch arranged outside the detector body (1), and a button switch is horizontally arranged at the inner end of the button switch. Slide bar (3), vertically be provided with an extruding protrusion (5) on the sliding bar (3), the lower end of extruding protrusion (5) is provided with arc-shaped surface, and the button head of lifting button (7) is provided with The rounded corner matched with the lower end of the extrusion protrusion (5), after the sliding rod (3) moves horizontally under the drive of the button switch, the arc surface of the extrusion protrusion (5) moves along the rounded corner of the button head , so that the lift button (7) moves downward, and the lift drive mechanism also includes a return mechanism for the slide rod (3). 8. A portable deteriorating meat detector according to claim 6, characterized in that, the self-locking structure comprises a hook (14) arranged on the side of the self-locking block (16), and the housing (6 ) openings are provided with two limiting plates, the above-mentioned self-locking block (16) is located between the two limiting plates, the upper and lower ends of the self-locking block (16) are arc-shaped, and the self-locking block (16) ) can swing left and right with the point of contact with the lifting member (8) as the fulcrum, and the lower ends of the two limit plates are provided with convex edges (15), and the two convex edges (15) are arranged on the same horizontal plane and facing each other. During the downward movement of the self-locking block (16), the hook (14) arranged on one side of the self-locking block (16) can be hooked on the convex edge (15) of the corresponding side limit plate.