A retractable temperature measuring device

Abstract

This utility model provides a retractable temperature measuring device, belonging to the field of temperature detection technology. The retractable temperature measuring device includes a housing, two winding mechanisms, and a temperature measuring module. The housing has protrusions on opposite side walls and two receiving cavities inside, each corresponding to one of the protrusions. The two winding mechanisms are located one-to-one within the receiving cavities, each with a winding strap extending from its corresponding protrusion. The temperature measuring module is located on one side wall of the housing, on a different side wall than the side wall where the protrusions are located. In the retracted state, the winding strap is wound within the receiving cavity, with its end extending beyond the protrusion. In the usage state, the two winding straps are pulled out and their ends connect to form a loop. The retractable temperature measuring device reduces its volume in the retracted state, occupies less space during storage, and significantly reduces transportation and storage costs.

Description

Technical Field

[0001] This utility model belongs to the field of temperature detection technology, specifically relating to a retractable temperature measuring device. Background Technology

[0002] Switch contacts are critical conductive components in power systems. Due to long-term current flow, increased contact resistance, oxidation, or loosening, they are prone to localized overheating. If not monitored in time, this can lead to electric arcing, equipment burnout, or even power outages. To monitor the temperature of switch contacts in real time, a temperature measuring device is usually installed around the outer periphery of the switch contacts. The outer shell of the temperature measuring device is ring-shaped, and the temperature probe protrudes from the inner ring of the device and rests against the switch contact to measure the temperature.

[0003] The ring structure of this temperature measuring device is relatively large, which means that when the device is not in use (such as during transportation or storage) or needs to be temporarily disassembled, it occupies a lot of space, increasing the transportation and storage costs of the device. Utility Model Content

[0004] This utility model provides a retractable temperature measuring device, which aims to solve the technical problem that existing temperature measuring devices are large in size, inconvenient to transport and store, and increase transportation and storage costs.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a retractable temperature measuring device, comprising:

[0006] The box body has protrusions on opposite side walls, and the box body has two receiving cavities, each of which corresponds to one of the protrusions.

[0007] Two winding mechanisms are located in the receiving cavity in a one-to-one correspondence. Each winding mechanism has a winding belt that extends from the corresponding outlet.

[0008] A temperature measuring module is located on one side wall of the box body, and the side wall on which the temperature measuring module is installed is different from the side wall where the outlet is located;

[0009] In the storage state, the take-up tape is wound inside the receiving cavity, with its end extending out of the protrusion; in the use state, the two take-up tapes are pulled out and their ends are connected to form a ring.

[0010] In one possible implementation, the winding mechanism includes:

[0011] winding motor;

[0012] A take-up shaft is fixedly connected to the output shaft of the take-up motor;

[0013] The beginning end of the take-up tape is fixed to the take-up shaft.

[0014] In one possible implementation, the take-up shaft is provided with a slot extending along its own axial direction, and the beginning end of the take-up tape is provided with a protrusion that engages with the slot.

[0015] In one possible implementation, each of the take-up tapes has an insertion portion and an insertion hole at its end, and the insertion portion on each of the take-up tapes is used to engage with the insertion hole on another take-up tape.

[0016] In one possible implementation, the temperature measuring module is located inside the box and has a probe extending out of the box.

[0017] In one possible implementation, the temperature measuring module is provided on both opposite sidewalls of the box.

[0018] In one possible implementation, the side wall of the housing with the temperature measuring module is an arc-shaped side wall, and the arc-shaped side wall is recessed towards the interior of the housing.

[0019] In one possible implementation, the box body has a side wall with an extension opening and a heat dissipation hole.

[0020] In one possible implementation, the box body is provided with a frame that encloses the receiving cavity, and the winding mechanism is fixed to the side wall of the frame.

[0021] In one possible implementation, the frame is detachably connected to the box body.

[0022] The solution shown in this application embodiment, compared with the prior art, has two states. In the storage state, the winding mechanism winds the winding tape into the receiving cavity, with the end of the winding tape extending out of the outlet to form an "exposed positioning end," making it easy for users to quickly locate the end of the winding tape. At this time, the overall volume of the device is only the volume of the box, with no extra exposed structures. In the use state, the user pulls the exposed ends of the two winding tapes, while the winding mechanism unwinds the winding tapes, pulling them out from the outlet until the ends of the two winding tapes meet to form a closed loop. The inner diameter of the loop structure can be adjusted by the length of the winding tape pulled out, adapting to different sizes of switch contacts. After the loop structure is fixed, the temperature measuring module is aligned with the key parts of the switch contact to achieve real-time temperature monitoring. Compared with traditional fixed loop temperature measuring devices, this application embodiment has a reduced volume in the storage state, allowing for stacking during transportation and reducing the space occupied during storage, significantly reducing transportation and storage costs. By adjusting the inner diameter of the loop by the length of the winding tape pulled out, it can cover common switch contact specifications, eliminating the need to customize devices for different switch models, reducing user procurement costs and improving the device's versatility. Attached Figure Description

[0023] Figure 1A cross-sectional structural schematic diagram of the retractable temperature measuring device provided in this embodiment of the utility model;

[0024] Figure 2 A schematic diagram of the left side of the retractable temperature measuring device provided in this embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram showing the unfolding of the take-up tape used in an embodiment of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 10-Box body; 11-Extended opening; 12-Frame; 13-Heat dissipation holes;

[0028] 20-Rewinding mechanism; 21-Rewinding motor; 22-Rewinding shaft; 221-Slot; 23-Rewinding belt; 231-Protrusion; 232-Insertion part; 233-Insertion hole;

[0029] 30 - Temperature measurement module; 31 - Probe. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. It should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0034] In the description of this application, the indicated orientations or positional relationships are generally based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application.

[0035] Please refer to the following: Figures 1 to 3 The retractable temperature measuring device provided by this utility model will now be described. The retractable temperature measuring device includes a box body 10, two winding mechanisms 20, and a temperature measuring module 30. The box body 10 has protrusions 11 on opposite side walls, and two receiving cavities inside, each corresponding to one protrusion 11. The two winding mechanisms 20 are located in corresponding receiving cavities, and each winding mechanism 20 has a winding strap 23 that extends from its corresponding protrusion 11. The temperature measuring module 30 is located on one side wall of the box body 10, and the side wall on which the temperature measuring module 30 is installed is different from the side wall where the protrusion 11 is located.

[0036] In the storage state, the winding tape 23 is wound into the receiving cavity and its end extends out of the outlet 11; in the use state, the two winding tapes 23 are pulled out and their ends are connected to form a ring.

[0037] Specifically, the temperature measurement module 30 can use a contact-type PT100 platinum resistance sensor, which is installed on the side wall (such as the front or rear side wall) of the housing 10 without the protrusion 11. The temperature measurement module 30 also integrates a signal processing unit (such as an MCU), which can convert temperature data into digital signals and support transmission to the back-end system via Bluetooth / 4G.

[0038] The retractable temperature measuring device provided in this embodiment has two states compared with the prior art. In the retractable state, the winding mechanism 20 winds the winding tape 23 into the receiving cavity, and the end of the winding tape 23 extends out of the extension port 11 to form an "exposed positioning end", which makes it easy for users to quickly find the end of the winding tape 23. At this time, the overall volume of the device is only the volume of the box 10, with no extra exposed structure. In the usage state, the user pulls the exposed ends of the two winding tapes 23, and at the same time the winding mechanism 20 unwinds the winding tapes 23. The winding tapes 23 are pulled out from the extension port 11 until the ends of the two winding tapes 23 are connected to each other to form a closed loop. The inner diameter of the loop structure can be adjusted by the length of the winding tapes 23 pulled out to adapt to different sizes of switch contacts. After the loop structure is fixed, the temperature measuring module 30 is aligned with the key parts of the switch contacts to realize real-time temperature monitoring. Compared with traditional fixed ring temperature measuring devices, the embodiments of this application have a reduced volume in the storage state, can be stacked during transportation, and occupy less space during storage, significantly reducing transportation and storage costs; by pulling out the length of the winding belt 23 to adjust the inner diameter of the ring, it can cover common switch contact specifications, eliminating the need to customize devices for different switch models, reducing user procurement costs and improving the versatility of the device.

[0039] In some embodiments, a specific implementation of the winding mechanism 20 described above may employ, as follows: Figure 1 The structure shown. See also Figure 1 The winding mechanism 20 includes a winding motor 21 and a winding shaft 22, with the winding shaft 22 fixedly connected to the output shaft of the winding motor 21. The starting end of the winding tape 23 is fixedly connected to the winding shaft 22. The winding motor 21 has forward and reverse rotation functions; when rotating forward, it releases the winding tape 23, and when rotating in reverse, it retracts the winding tape 23. In use, the winding motor 21 is turned on, releasing the winding tape 23. This process occurs around the outer periphery of the switch contact. Simultaneously, the end of the winding tape 23 is pulled externally to unfold it against the outer periphery of the switch contact. When the ends of the two winding tapes 23 are just aligned and can wrap around the switch contact once, the winding motor 21 is turned off, fixing the ends of the two winding tapes 23. Temperature measurement can then be performed. Compared to a manual winding structure, this embodiment of the winding mechanism 20 eliminates the need for manual pulling of the winding tape 23; the operation of the winding motor 21 can be controlled via a button or remote control, reducing labor intensity and improving work efficiency.

[0040] It should be noted that both the temperature measuring module 30 and the winding motor 21 require electric drive. The box body 10 is also equipped with a power cord. When using it for temperature measurement, the power cord is connected to the power source, which can supply power to the winding motor 21 and the temperature measuring module 30.

[0041] Specifically, the winding motor 21 has a built-in overload protection module. When the tension on the winding belt 23 exceeds the set threshold, the motor will automatically stop to prevent damage to the winding belt 23 or the motor.

[0042] As a modified implementation, the winding mechanism 20 can also adopt the form of a spiral spring + winding shaft 22. A spring fixing seat is provided in the receiving cavity to fix the inner end of the spiral spring. The outer end of the spiral spring is fixed to one end of the winding shaft 22. The other end of the winding shaft 22 is connected to the side wall of the receiving cavity through a bearing to ensure smooth rotation. One end of the winding tape 23 is fixed to the winding shaft 22, and the other end extends out from the extension port 11. When releasing, pulling the end of the winding tape 23 drives the winding shaft 22 to rotate, and the spiral spring torsion stores energy. When storing, releasing the winding tape 23 releases the stored energy, driving the winding shaft 22 to rotate in the opposite direction, automatically winding the winding tape 23 back into the receiving cavity. The exposed length of the end of the winding tape 23 can be controlled by a limiting piece.

[0043] In some embodiments, a specific cooperation method between the aforementioned take-up shaft 22 and take-up belt 23 can be as follows: Figure 1 The structure shown. See also Figure 1 The take-up shaft 22 has a groove 221 extending along its own axial direction, and the beginning end of the take-up belt 23 has a protrusion 231 that engages with the groove 221. The groove 221 extends to the end of the take-up shaft 22 away from the motor. When installing the take-up belt 23, the protrusion 231 on the take-up belt 23 is inserted into the groove 221 along the end of the groove 221 away from the motor. When fully inserted into the groove 221, the take-up belt 23 is fixed to the take-up shaft 22. When the take-up shaft 22 rotates, the engagement of the protrusion 231 and the groove 221 prevents the take-up belt 23 from detaching from the take-up shaft 22. Furthermore, the take-up belt 23 is easy to replace after a period of use, resulting in low maintenance costs.

[0044] In some embodiments, a specific implementation of the above-described take-up tape 23 may employ the following method: Figures 1 to 3 The structure shown. See also Figures 1 to 3 Each take-up tape 23 has an insertion part 232 and an insertion hole 233 at its end. The insertion part 232 on each take-up tape 23 is used to engage with the insertion hole 233 on another take-up tape 23. Multiple insertion holes 233 are provided along the extension direction of the take-up tape 23. The insertion part 232 is fixed in one of the insertion holes 233. During the process of the take-up mechanism 20 releasing the take-up tape 23, the take-up tape 23 may be released too long due to the delay in closing the take-up motor 21. At this time, the insertion part 232 on the take-up tape 23 can be adjusted to engage with the insertion hole 233 at different positions to tighten the take-up tape 23 around the switch contact, ensuring that the temperature measuring module 30 is in contact with the outer peripheral surface of the switch contact and improving the accuracy of temperature measurement.

[0045] Specifically, the plug part 232 is cylindrical and has a spherical structure at the end. The diameter of the spherical structure is slightly larger than the diameter of the plug hole 233, and the diameter of the cylindrical plug part 232 is slightly smaller than the diameter of the plug hole 233. The winding tape 23 is made of rubber and has a certain degree of elastic deformation. When the plug part 232 is engaged with the plug hole 233, the spherical structure on the plug part 232 passes through the plug hole 233, which can prevent the plug part 232 from coming out of the plug hole 233 and improve the firmness of the connection.

[0046] As a modified implementation, a fixing structure may be provided on one of the take-up belts 23. The fixing structure includes a base and a pressure plate hinged to the base. A serrated strip is fixed on the pressure plate. When the pressure plate is rotated to be parallel to the base, the serrated strip presses against the take-up belt 23, which can fix the take-up belt 23. For details, please refer to the waist belt.

[0047] In some embodiments, a specific implementation of the temperature measuring module 30 described above can adopt the following approach: Figure 1 The structure shown. See also Figure 1 The temperature measurement module 30 is located inside the housing 10 and has a probe 31 extending out of the housing 10. The temperature measurement module 30 includes a sensor (contact thermistor), a signal amplifier, an A / D converter, and a data interface, etc. The sensor is the probe 31 of the temperature measurement module 30. Except for the probe 31, everything is located inside the housing 10. The housing 10 can form a sealed protection for the signal amplifier, converter, and other structures, preventing dust, moisture, etc. from entering the module and affecting its normal use, thus extending the service life of the temperature measurement module 30.

[0048] It is easy to imagine that the box 10 is a hollow structure. In addition to the two accommodating cavities, the space can be used to install the temperature measuring module 30. The side wall of the box 10 is provided with a through hole for the probe 31 to extend out. In order to avoid the probe 31 from colliding with the inner wall of the through hole, a sponge or other structure can be pasted on the inner wall of the through hole to prevent the probe 31 from being damaged and affecting the temperature measurement accuracy.

[0049] In some embodiments, an improved implementation of the temperature measuring module 30 described above can adopt the following approach: Figure 1 The structure shown. See also Figure 1 Temperature measuring modules 30 are provided on both opposite side walls of the housing 10. Each temperature measuring module 30 can be arranged as described above, with only the probe 31 of the temperature measuring module 30 protruding.

[0050] See Figure 1In the orientation of the housing 10, protrusions 11 are provided on the left and right side walls, and probes 31 of the temperature measuring module 30 extend from the upper and lower side walls, while the front and rear side walls are closed. When two temperature measuring modules 30 are used, they can be of the same model and specifications or different models and specifications. For example, both temperature measuring modules 30 can be contact temperature sensors, or one can be a contact temperature sensor and the other a non-contact temperature sensor. During testing, one of the two temperature measuring modules 30 can be selected for temperature measurement according to different testing requirements. Furthermore, if one temperature measuring module 30 fails, the other can be used as an emergency measure, improving the reliability of the device.

[0051] It should be noted that the two temperature measuring modules 30 can share a single data processing unit (MCU). When the two modules use different types of sensors, they can also use two separate sensors to measure the temperature of the switch contacts. The data processing unit can analyze the temperatures detected by the two temperature measuring modules 30, such as taking the average value and determining the temperature difference.

[0052] Specifically, the side wall of the temperature measuring module 30 in the housing 10 is an arc-shaped side wall, which is recessed towards the interior of the housing 10. The arc-shaped side wall and its curvature can be set according to the specifications of the switch contact, so that the arc-shaped side wall of the housing 10 fits more closely to the outer circumference of the switch contact. After the two winding tapes 23 are joined together, they can form a near-circular structure with the arc-shaped side wall, which improves the stability of the housing 10 fixed to the outer circumference of the switch contact and avoids shaking during temperature measurement, thus affecting the accuracy of temperature measurement.

[0053] Furthermore, the housing 10 is equipped with two temperature measuring modules 30, which correspond to two arc-shaped sidewalls (the upper and lower sidewalls are arc-shaped, with the upper sidewall concave downwards and the lower sidewall concave upwards). The curvature of the two arc-shaped sidewalls can be different, thereby adapting to the measurement requirements of switch contacts of different specifications.

[0054] In some embodiments, an improved implementation of the housing 10 described above may employ, as follows: Figure 2 The structure shown. See also Figure 2 The box body 10 has a side wall with an extension 11 and a heat dissipation hole 13. Since the box body 10 contains a winding motor 21 and the temperature measuring module 30 (excluding the probe 31), the internal heat can be dissipated through the heat dissipation hole 13, which avoids damage to the motor and other structures due to overheating, and also avoids the winding tape 23 from aging and becoming unusable due to overheating. In addition, the two side walls with extensions 11 are arranged opposite each other, and the heat dissipation holes 13 on them can form air convection, increase the air flow rate, and improve the heat dissipation efficiency.

[0055] Specifically, a dustproof mesh can be installed at the location of the heat dissipation hole 13 to prevent dust from entering the box 10; the dustproof mesh and the heat dissipation hole 13 can be detachably connected by a structure such as a snap-fit, which is convenient for regular disassembly and cleaning, and avoids dust clogging the heat dissipation hole 13.

[0056] In some embodiments, a specific implementation of the above-described receiving cavity may employ, as follows: Figure 1 The structure shown. See also Figure 1 The housing 10 has a frame 12 inside, which encloses and forms a receiving cavity. The winding mechanism 20 is fixed to the side wall of the frame 12. The frame 12 has a grid structure, which can separate the winding motor 21 from other spaces, ensure the normal heat dissipation of the winding motor 21, and prevent the winding tape 23 from being thrown to other areas when it is wound up, thus ensuring the normal operation of the winding motor 21.

[0057] Specifically, the frame 12 and the box body 10 are detachably connected. For example, the connection is achieved using a combination of clips and screws. Each side wall of the frame 12 has two elastic clips, and the free end of the clips has a barb. The inner side wall of the receiving cavity of the box body 10 has a slot 221 corresponding to the clips. The barb of the clips automatically engages with the slot 221 to achieve initial fixation. The top of the frame 12 has two threaded holes, and the top of the box body 10 has a through hole corresponding to the threaded holes. After the frame 12 is initially fixed, an M3 hand-tightened screw passes through the through hole of the box body 10 and connects to the threaded hole of the frame 12 to achieve secondary fixation. The detachable connection makes the frame 12 and the winding mechanism 20 independent modules. When the winding mechanism 20 fails, the entire frame 12 module can be replaced directly without repairing individual parts, thus improving maintenance efficiency. At the same time, users can replace the frame 12 module with different specifications as needed, which greatly improves the functionality of the device. The modular design avoids the scrapping of the entire device due to partial failure. When the winding mechanism 20 is damaged, only the frame 12 module needs to be replaced, which reduces maintenance costs compared to replacing the entire device.

[0058] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A stowable temperature measuring device, characterized by, include: The box body has protrusions on opposite side walls, and the box body has two receiving cavities, each of which corresponds to one of the protrusions. Two winding mechanisms are located in the receiving cavity in a one-to-one correspondence. Each winding mechanism has a winding belt that extends from the corresponding outlet. A temperature measuring module is located on one side wall of the box body, and the side wall on which the temperature measuring module is installed is different from the side wall where the outlet is located; In the storage state, the take-up tape is wound inside the receiving cavity, with its end extending out of the protrusion; in the use state, the two take-up tapes are pulled out and their ends are connected to form a ring.

2. The stowable temperature measuring device of claim 1, wherein, The winding mechanism includes: winding motor; A take-up shaft is fixedly connected to the output shaft of the take-up motor; The beginning end of the take-up tape is fixed to the take-up shaft.

3. The stowable temperature measuring device of claim 2, wherein the temperature measuring device is a thermometer. The take-up shaft is provided with a slot extending along its own axis, and the beginning end of the take-up tape is provided with a protrusion, which engages with the slot.

4. The retractable temperature measuring device as described in claim 1, characterized in that, Each of the take-up tapes has an insertion part and an insertion hole at its end, and the insertion part on each of the take-up tapes is used to engage with the insertion hole on another take-up tape.

5. The stowable temperature measuring device of claim 1, wherein: The temperature measuring module is located inside the box and has a probe that extends out of the box.

6. The stowable temperature measuring device of claim 1 or 5, wherein The temperature measuring module is provided on both opposite side walls of the box.

7. The stowable temperature measuring device of claim 6, wherein the temperature measuring device is a thermometer. The side wall of the box body where the temperature measuring module is located is an arc-shaped side wall, and the arc-shaped side wall is recessed towards the interior of the box body.

8. The stowable temperature measuring device of claim 1, wherein: The box body has a protruding side wall and also has heat dissipation holes.

9. The retractable temperature measuring device as described in claim 1, characterized in that, The box body is provided with a frame, which encloses the receiving cavity, and the winding mechanism is fixed to the side wall of the frame.

10. The stowable temperature measuring device of claim 9, wherein the temperature measuring device is a thermometer. The frame is detachably connected to the box body.

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