Heating constant-temperature device for small animal operation experiment

Abstract

The utility model discloses a heating constant-temperature device for small animal operation experiments, which comprises a shell, an inner cavity of the shell is divided into a heating bin and an element bin by a partition plate, an electric heating wire is arranged in the heating bin, a shaft sleeve is arranged on the partition plate, a rotating shaft is arranged on the shaft sleeve, a thermosensitive spring is sleeved at one end of the rotating shaft positioned in the heating bin, and the tail end of the thermosensitive spring is connected with the rotating shaft. The end, located in the element bin, of the rotating shaft is provided with a movable contact, and a fixed contact is arranged at the position, corresponding to the movable contact, in the element bin. When the temperature reaches the set temperature, the spring drives the rotating shaft to rotate, the movable contact and the fixed contact are disconnected, and the constant temperature can be kept, so that the body temperature of an animal body in an experiment is ensured to the maximum extent, and the normal function is maintained. Meanwhile, direct-current heating and a mechanical contact switch are adopted, so that pulse model interference is avoided, the experiment success rate is increased, and the experiment effect and result data acquisition are optimized.

Description

Technical Field

[0001] The utility model relates to a small animal surgery experiment device, in particular to a small animal surgery experiment heating constant temperature device. Background Art

[0002] During functional electrophysiological experiments, surgery is usually performed on small rodents such as mice. Surgery is a major injury to the body, especially when the scope of surgery is large, there is a lot of bleeding during the operation, the operation time is long, the incision is exposed, etc., which causes the animal's function to decline during the operation. At the same time, due to the inhibitory effect of anesthetics on central body temperature regulation, it is easy to cause hypothermia and increase the occurrence of various complications. Hypothermia will reduce blood circulation, aggravate tissue hypoxia, and cause experimental animals to shiver. During the experiment, the normal function of the body cannot be guaranteed, resulting in unstable and inaccurate collected data. Therefore, it is very necessary to keep the body warm during surgery.

[0003] The existing small animal surgery laboratory table can only be heated to a certain temperature and cannot maintain constant temperature, resulting in the inability to ensure the optimal body condition of the experimental animals during the experiment. In addition, the use of AC heating has problems such as electrical interference signals, which interfere with the collection of electrophysiological signals and lead to inaccurate recording results. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a small animal surgical experiment heating thermostat, which can constantly control and keep warm, keep the body warm during surgery, and prevent the body from shivering due to excessive temperature difference, thereby ensuring the various functions of the experimental body during the experiment.

[0005] To achieve the above objectives, the utility model provides a small animal surgical experiment heating constant temperature device, comprising a shell with an insulating function, the shell is divided into a heating chamber and a component chamber by a vertically arranged insulating partition, a heating wire is arranged in the heating chamber, a shaft sleeve is fixedly arranged on the partition, a rotating shaft is rotatably connected in the shaft sleeve, both ends of the rotating shaft extend out of the shaft sleeve, a thermistor spring sleeve is sleeved on the outer side of one end of the rotating shaft located in the heating chamber, the end of the thermistor spring is connected to the rotating shaft, and the other end is fixed on the shaft sleeve, a moving contact is arranged at one end of the rotating shaft located in the component chamber, the wiring terminal of the moving contact is connected to one end of the heating wire through a wire, and the other end of the heating wire is connected to the negative pole of a power supply through a wire, and a fixed contact is arranged at a position inside the component chamber corresponding to the moving contact, and the wiring terminal of the fixed contact is connected to the positive pole of a power supply through a wire, so that a heating circuit is formed after the moving and fixed contacts are closed.

[0006] The above technical solution provides heat through electric heating to keep the experimental body warm. During the experiment, when the power is turned on, the heating wire heats up. When the set temperature is reached, the thermal spring expands due to heat and drives the rotating shaft to rotate, causing the moving contact and the fixed contact to disconnect, and the heating wire stops heating. When the temperature drops, the thermal spring retracts, the electric rotating shaft rotates in the opposite direction, the moving contact and the fixed contact close, the power supply is connected, and the heating wire heats up. In this way, the heating chamber can maintain a constant temperature, which maximally ensures the functions of the animal body in the experiment, accelerates the experimental process, optimizes the data collection of the experimental results, and has a reasonable and simple overall structural design, which is easy to implement. In addition, the heating wire of the above technical solution is connected to direct current, and the switch uses a mechanical contact switch, thus avoiding 50 Hz AC interference and the pulse signal interference of the relay switch, reducing the electrical interference factors in the electrophysiological experiment, improving the success rate of the experiment, and optimizing the data collection of the experimental results.

[0007] Further, the fixed contact is fixedly connected to the temperature adjustment turntable through a substrate. On one side of the temperature adjustment turntable, a hollow connecting sleeve is provided. The connecting sleeve is coaxially arranged with the shaft sleeve. The connecting sleeve is rotatably connected to the partition plate. One end of the rotating shaft located in the component chamber passes through the connecting sleeve and is fixedly connected to the connecting disk. The moving contact is arranged on the connecting disk. On one side of the temperature adjustment turntable, a temperature adjustment rod meshing with it is provided. One end of the temperature adjustment rod is fixedly connected to a temperature adjustment knob located outside the housing through a rotating shaft. The rotating shaft is rotatably arranged on the housing.

[0008] This technical solution rotates the temperature adjustment knob to make the temperature adjustment rod drive the temperature adjustment turntable meshing with it to rotate, and then drives the fixed contact connected to the turntable, thereby adjusting the angle of the fixed contact, so that the thermal spring needs to deform in different sizes to disconnect the moving and fixed contacts, thus setting different temperatures. By setting multiple temperature adjustment gears, the convenience of using the heating and constant temperature device for small animal surgery experiments of the technical solution is improved.

[0009] Further, a thermometer is provided on one side of the temperature adjustment knob. The detection head of the thermometer penetrates the wall plate of the housing and extends into the heating chamber to measure the temperature in the heating chamber. Through the thermometer, the temperature inside the housing can be displayed, and the temperature can be observed in real time, improving the convenience of use.

[0010] Further, the moving contact is arranged at one end of the substrate, and the other end of the substrate is connected to the connecting seat disk.

[0011] Further, connecting seats are provided on both sides of the top surface of the housing. The top of the connecting seat is threadedly connected with a fixing seat. The top of the fixing seat is rotatably provided with a rotating part.

[0012] Furthermore, a ratchet mechanism is provided at the bottom of the rotating part, and the ratchet mechanism is used to limit the rotation direction of the rotating part. A fixing rope is detachably provided at the top of the rotating part.

[0013] Furthermore, a through hole is opened in the middle of the rotating part, and the fixing rope passes through the through hole. A fixing bolt is provided on one side of the rotating part, and the fixing bolt is used to fix the fixing rope.

[0014] The above technical solution fixes the small animal by fixing the rope, which is convenient for aligning the experimental small animal during the experiment so that the body is exposed to the surgical operation field of view. At the same time, the small animal is stably fixed and the accuracy of the surgical operation is ensured.

[0015] Furthermore, the power supply is a direct current power supply. Using a direct current power supply reduces the interference of alternating current on monitoring data, reduces electrical interference factors in electrophysiological experiments, and improves the accuracy of data collection.

[0016] Furthermore, the shell is a double-layer structure consisting of an inner shell and an outer shell, the inner shell is enclosed by a wooden board, and the outer shell is enclosed by a metal plate. The wooden shell has insulation and heat preservation properties, which improves the installation of the device while reducing heat dissipation and improving heat utilization. The iron shell can improve the durability of the shell, and the metal has a shielding effect, which reduces electromagnetic interference during the experiment and ensures the accuracy of data collection.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. The utility model provides temperature through the heating mechanism to keep the experimental body warm, avoid various complications caused by low temperature, ensure the normal functions of the body, and provide a basis for ensuring the accuracy of electrophysiological data collection. When the temperature drops, the thermistor spring retracts, the electric rotating shaft rotates in the opposite direction, the moving contact and the fixed contact are closed, the power is turned on, and the heating wire is heated. This reciprocating process can keep the heating chamber at a constant temperature, prevent the body from shivering due to excessive temperature differences, and ensure the animal body function in the experiment to the greatest extent, accelerate the experimental process, optimize the experimental effect and the data collection of the results. The overall structural design is reasonable, simple, and easy to implement;

[0019] 2. The utility model adopts DC heating and mechanical contact switch, avoiding 50 Hz AC interference and pulse type interference of relay switch, improving the success rate of the experiment, and optimizing the data collection of the experimental effect and results;

[0020] 3. The utility model adjusts the angle of the temperature adjustment dial by rotating the temperature adjustment knob, and then adjusts the fixed contact angle to achieve the setting of different temperatures, thereby improving the convenience of use;

[0021] 4. The utility model is provided with a fixing seat, a rotating part and a fixing rope connected to the rotating part. The fixing rope can be used to conveniently fix the small animal, so that the experimental small animal can be straightened during the experiment, so that the body is exposed to the surgical operation field of view, the convenience of the operation is improved, and at the same time, the small animal is stably fixed to ensure the accuracy of the surgical operation, and the operation is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the heating thermostatic device for small animal surgery experiments of the utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the heating thermostatic device for small animal surgery experiments of the utility model;

[0024] Figure 3 for Figure 1 Schematic diagram of the enlarged structure of A.

[0025] In the figure: 1, shell; 101, inner shell; 102, outer shell; 2, component compartment; 3, heating compartment; 4, thermometer; 5, heating wire; 6, partition; 7, bushing; 8, thermal spring; 9, rotating shaft; 10, temperature control knob; 11, rotating shaft; 12, temperature control rod; 13, temperature control dial; 14, connecting sleeve; 15, connecting disk; 16, substrate; 17, fixed contact; 18, connecting seat; 19, fixing seat; 20, fixing rope; 21, fixing bolt; 22, through hole; 23, rotating part; 24, auxiliary plate. DETAILED DESCRIPTION

[0026] The following will combine the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Example 1: Figure 1 and 2The small animal surgical experiment heating and constant temperature device shown includes a housing 1. The housing 1 is rectangular, and the top of the housing 1 is an operation surface for surgical experiments. The interior of the housing 1 is divided into a component bin 2 and a heating bin 3 by a partition 6 fixed therein. The length of the heating bin 3 is greater than that of the component bin 2. The partition 6 is vertically arranged. The housing 1 is a double-layer structure composed of an inner shell 101 and an outer shell 102. The inner shell 101 is enclosed by wooden boards, and the outer shell 102 is enclosed by metal plates. The wooden boards can not only insulate, keep warm, but also reduce noise, providing good conditions for small animal surgical experiments, and the cost is low, reducing the manufacturing cost of this device. A metal plate is arranged on the outside of the wooden shell, and the metal plate is preferably a stainless steel plate to improve the strength and durability of the housing 1. A grounding wire is connected to the outer shell 102 to ensure the safety of using this device. The partition 6 is a wooden board, which can effectively block the heat in the heating bin 3 from being transferred to the component bin 2, improve the heat utilization rate, and also play a role in noise reduction. In other embodiments not shown, heat insulation layers are provided between the side walls and the bottom plates of the inner shell 101 and the outer shell 102 to further prevent heat dissipation and improve the heat utilization rate. In this embodiment, a thermometer 4 is arranged on the outside of the housing 1, and the detection head of the thermometer 4 penetrates the housing 1 and extends into the heating bin 3 to measure the temperature in the heating bin 3.

[0028] An electric heating wire 5 is arranged in the heating bin 3. It should be noted that the electric heating wire 5 here is a group of electric heating wires connected in series by a plurality of electric heating wires. In order to enable the heating bin 3 to heat up quickly, the electric heating wire 5 is arranged in an S shape in the heating length. The electric heating wire 5 is fixed in the heating bin by fixing screws, specifically, it is fixed on the wall plate of the housing 1 by a plurality of screws to form an S-shaped arrangement. In order to enable the heat to be quickly transferred to the operation surface at the top, the resistance wire 5 is arranged in the upper part of the heating bin 3.

[0029] A bushing 7 is provided on the partition plate 6. A rotating shaft 9 is rotatably connected within the bushing 7. Both ends of the rotating shaft 9 extend out of the bushing 7. One end thereof is located within the heating chamber 3, and the other end is located within the component chamber 2. A thermal spring 8 is sleeved on the end of the rotating shaft located within the heating chamber 3. The end of the thermal spring 8 is connected to a fixed shaft, and the other end is fixed to the bushing 7. The thermal spring 8 is a helical spring made of a thermosensitive metal, so that the thermal spring 8 expands when heated to drive the rotation of the rotating shaft 9. The other end of the rotating shaft 9 is fixedly connected to a moving contact 17 located within the component chamber 2, so that the moving contact is displaced as the rotating shaft 9 rotates. The wiring terminal of the moving contact is connected to one end of the heating wire 5 through a wire, and the other end of the heating wire 5 is connected to the negative pole of the power supply through a wire. The moving contact and the rotating shaft 9 are connected in the following manner: A connection disk 15 is fixedly connected to the end of the rotating shaft 9 located within the component chamber 2. A substrate 16 is fixedly connected to the connection disk 15. The moving contact is fixedly arranged on the substrate 16. A fixed contact 17 is provided within the component chamber 2 corresponding to the moving contact. The wiring terminal of the fixed contact 17 is connected to the positive pole of the power supply through a wire. The fixed contact 17 is fixedly connected to the temperature adjustment turntable 13 through the substrate 16, so that as the temperature adjustment turntable 13 rotates, the fixed contact 17 is driven to rotate, thereby adjusting the position of the fixed contact 17. Insulating layers are provided on the surfaces of the bushing 7, the rotating shaft 8, and the connection disk 15, or they are all made of insulating materials. When the power switch is turned on, when the moving contact and the fixed contact 17 are closed, the current flows from the positive pole of the power supply through the two contacts into the heating wire 5 and returns to the negative pole of the power supply via the heating wire 5, forming a closed loop. The heating wire works. When a certain temperature is reached, the thermal spring 8 expands when heated, causing the rotating shaft 9 to rotate, thereby driving the moving contact to be displaced and disconnected from the fixed contact, and the circuit is disconnected, stopping heating. After the temperature drops, the thermal spring 8 contracts, driving the rotating shaft 9 to rotate in the reverse direction, causing the moving contact to be closed again with the fixed contact 17, and the heating wire 5 starts heating, and so on to maintain a constant temperature. In this embodiment, the temperature adjustment turntable 13 has an insulating function. In other embodiments, the temperature adjustment turntable 13 can also be made of a conductive material. At this time, the fixed contact 17 is fixed to the temperature adjustment turntable 13 through the substrate 16, and the temperature adjustment turntable 13 is connected to the positive pole of the power supply through a wire.

[0030] The power supply in this embodiment uses a DC power supply. The power supply uses direct current. The connecting wires of the moving and fixed contacts 17 are connected to the DC power supply through quick plugs, reducing the interference of alternating current on the monitoring data, reducing the electrical interference factors in the electrophysiological experiment, and improving the accuracy of data acquisition.

[0031] A central hole is provided in the center of the temperature adjustment turntable 13. On one side thereof, a hollow connecting sleeve 14 is fixedly connected. The connecting sleeve 14 is rotatably connected to the partition plate 6. One end of the rotating shaft 9 located in the component bin 2 sequentially passes through the connecting sleeve 14 and the central hole and is fixedly connected to the connecting disk 15. The diameter of the central hole and the inner hole of the connecting sleeve 14 is larger than the diameter of the rotating shaft 9, so that the rotating shaft 9 does not contact the connecting sleeve 14 and the temperature adjustment turntable. The rim of the temperature adjustment turntable 13 has teeth, and a temperature adjustment rod 12 meshing with it is provided below. The temperature adjustment rod 12 is a worm, and the temperature adjustment turntable 13 is a worm gear. The temperature adjustment turntable 13 is provided with an insulating layer or made of insulating material. The temperature adjustment knob 10 is arranged on the outside of the housing 1. The rotating shaft 11 of the temperature adjustment knob 10 penetrates through the wall plate of the housing and extends into the component bin 2 and is fixedly connected to the temperature adjustment rod 12. The rotating shaft 11 is rotatably connected to the side plate of the housing 1. When in use, the temperature adjustment knob 10 is rotated to drive the temperature adjustment rod 12 to rotate, and then drive the temperature adjustment turntable 13 to rotate. Under the action of the temperature adjustment turntable 13, the fixed contact 17 is displaced, so as to adjust the angle of the fixed contact 17. By adjusting the angle of the fixed contact 17, the thermal spring 8 needs a longer or shorter deformation to drive the moving contact to disconnect from the fixed contact 17, so as to achieve the purpose of adjusting the temperature inside the heating bin 3. In other embodiments, in order to support the sleeve 7 and the connecting sleeve 14 and facilitate the fixing of the wires in the component bin 2, an auxiliary plate 24 is fixedly arranged on the side of the partition plate 6 close to the component bin 2. The auxiliary plate 24 is an insulating plate, and the connecting sleeve 14 is rotatable relative to the auxiliary plate 24.

[0032] In this embodiment, referring to Figure 1 and Figure 3 , on both sides of the upper surface of the housing 1, connecting seats 18 are provided. The top of the connecting seat 18 is threadedly connected with a fixing seat 19. The top of the fixing seat 19 is rotatably provided with a rotating part 23. A ratchet mechanism is provided at the bottom of the rotating part 23 for restricting the rotation direction of the rotating part 23. A fixing rope 20 is detachably arranged at the top of the rotating part 23. A through hole 22 is provided in the middle of the rotating part 23. The fixing rope 20 penetrates through the through hole 22. A fixing bolt 21 is provided on one side of the rotating part 23 for fixing the fixing rope 20.

[0033] The fixing base 19 is connected to the threaded hole on the connecting base 18 through the threaded posts protruding from the bottom, thereby fixing the fixing base 19 on the connecting base 18. A ratchet mechanism provided between the rotating part 23 and the fixing base 19 is used to limit the rotation direction of the rotating part 23, so that the rotating part 23 can only rotate to one side. The fixing rope 20 can be inserted into the through hole 22. After rotating the fixing bolt 21 on one side of the through hole 22, the fixing bolt 21 can fix the fixing rope 20 in the through hole 22, and the other end of the fixing rope 20 is used to fix the experimental small animal. After fixing, rotating the rotating part 23 to one side can tighten the fixing rope 20. The four rotating parts 23 can be rotated and fixed respectively, which is more convenient when fixing the experimental animal. At the same time, the rotating part 23 is provided with an inward depression for limiting and storing the fixing rope 20 to prevent the fixing rope 20 from slipping out during rotation. The fixing rope 20 can conveniently fix the small animal, so as to straighten the experimental small animal during the experiment, so that the body is exposed within the surgical operation field of view, improving the convenience of the operation. At the same time, the small animal is stably fixed, which also ensures the accuracy of the surgical operation.

[0034] The specific embodiments provided by the present invention have been introduced in detail above. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A heating thermostatic device for small animal surgical experiments, comprising a housing with an insulating function, characterized in that: The shell is divided into a heating chamber and a component chamber by a vertically arranged insulating partition. A heating wire is arranged in the heating chamber, a sleeve is fixedly arranged on the partition, a rotating shaft is rotatably connected in the sleeve, both ends of the rotating shaft extend out of the sleeve, a thermistor spring sleeve is sleeved on the outer side of the end of the rotating shaft located in the heating chamber, the end of the thermistor spring is connected to the rotating shaft, and the other end is fixed on the sleeve, a moving contact is arranged at the end of the rotating shaft located in the component chamber, the wiring terminal of the moving contact is connected to one end of the heating wire through a wire, and the other end of the heating wire is connected to the negative pole of the power supply through a wire, and a fixed contact is arranged at a position inside the component chamber corresponding to the moving contact, and the wiring terminal of the fixed contact is connected to the positive pole of the power supply through a wire, so that a heating circuit is formed after the moving and fixed contacts are closed.

2. The small animal surgery experiment heating constant temperature device according to claim 1, characterized in that: The fixed contact is fixedly connected to the temperature control turntable through a substrate, a hollow connecting sleeve is arranged on one side of the temperature control turntable, the connecting sleeve is coaxially arranged with the shaft sleeve, the connecting sleeve is rotatably connected to the partition, the rotating shaft is located at one end of the element bin and passes through the connecting sleeve and is fixedly connected to the connecting disk, the connecting disk is provided with the moving contact, a temperature control rod meshing with the temperature control turntable is arranged on one side of the temperature control turntable, one end of the temperature control rod is fixedly connected to the temperature control knob located on the outside of the shell through a rotating shaft, and the rotating shaft is rotatably arranged on the shell.

3. The small animal surgery experiment heating constant temperature device according to claim 2, characterized in that: A thermometer is arranged on one side of the temperature adjustment knob, and a detection head of the thermometer penetrates through the shell and extends into the heating chamber.

4. The small animal surgery experiment heating constant temperature device according to claim 2, characterized in that: The moving contact is arranged at one end of the substrate, and the other end of the substrate is connected to the connecting seat.

5. The small animal surgery experiment heating constant temperature device according to claim 1, characterized in that: Four connecting seats are arranged on both sides of the top surface of the shell, the top of the connecting seat is connected with a fixing seat through threads, and the top of the fixing seat is rotatably provided with a rotating part.

6. The heating and constant temperature device for small animal surgery experiments according to claim 5, characterized in that: A ratchet mechanism is provided at the bottom of the rotating part to limit the rotation direction of the rotating part, and a fixing rope is detachably provided at the top of the rotating part.

7. The heating and constant temperature device for small animal surgery experiments according to claim 6, characterized in that: A through hole arranged along the radial direction is opened in the middle of the rotating part, and the fixing rope passes through the through hole. A fixing bolt is provided on one side of the rotating part to fix the fixing rope.

8. The heating and constant temperature device for small animal surgery experiments according to claim 1, characterized in that: The power supply is a direct current power supply.

9. The small animal surgery experiment heating constant temperature device according to any one of claims 1 to 8, characterized in that: The shell is a double-layer structure consisting of an inner shell and an outer shell. The inner shell is enclosed by wooden boards, and the outer shell is enclosed by metal plates.

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