A teaching limb device that can be quickly and easily disassembled and allows for evaluation of plaster cutting results.
Patent Information
- Application Number
- TW114112170
- Authority / Receiving Office
- TW · TW
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-10-01
- Estimated Expiration
- 2045-03-27
AI Technical Summary
Current plaster cast teaching methods face difficulties in disassembly and evaluation of cutting results, leading to disrupted teaching progress and unfair assessments due to the inability to objectively measure plaster cutting depth and pressure.
A teaching limb device with modular components and pressure sensing technology allows for easy disassembly and evaluation of plaster cutting results, featuring a modular hand mold assembly, thumb mold portion, and pressure sensing components to assess cutting accuracy.
Enables efficient disassembly of plaster casts without teacher intervention and provides objective data for cutting results, ensuring fair assessments and continuous teaching progress.
Smart Images
Figure TWG2TA001078012_001 
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Abstract
Description
A teaching limb device that can be quickly and easily disassembled and allows for evaluation of plaster cutting results. This invention relates to a teaching limb device that can be quickly and easily disassembled and used to evaluate plaster cutting results, and more particularly to a teaching limb device that combines the convenience of retracting plaster components from the device in reverse, and the ability to assist in evaluating cutting results. In the current medical system, plaster cast teaching mostly uses traditional prosthetic hands or real students to practice applying plaster casts. After the plaster cast is fixed and formed, the plaster cast is then removed, thus completing the entire medical teaching and practice of plaster cast fixation treatment. The aforementioned teaching practice of applying plaster casts using traditional prosthetic hands has the following problems: [a] Difficulty in disassembly can affect teaching progress. After a traditional prosthetic hand is applied and fixed in place with plaster, the plaster covering makes it difficult to detach from the hand unless the plaster is cut and removed. Sometimes, interns may not be able to successfully cut and remove the plaster. For example, if there are 20 groups of interns, with 4 groups per session for 5 sessions, and at least one group fails to successfully cut and remove the plaster in each session, the next group will be unable to participate in the teaching. In this case, the instructor may need to remove the plaster, thus affecting the teaching progress. Furthermore, current medical teaching assessments and tests often rely on standard patients or teaching aids that can quickly return to their original state. During teaching tests, to ensure that each student has the same testing baseline, the teaching aids must return to their original state within a limited time. If the teaching aids cannot return to their original state within the limited time, they cannot be used as testing tools. [b] It is difficult to assess the cutting results. Secondly, when the intern saws the plaster cast, is the sawing depth correct throughout the entire movement path? Or are some parts sawed too deep, potentially causing injury to the patient? Currently, no objective data can be provided for these issues. Even with traditional prosthetic hands, only the external integrity can be observed. This not only makes it impossible to conduct tests and scoring but may also lead to unfair scoring and the regrettable inability to record sawing depth or pressure data (for subsequent review or teaching research). In view of this, it is necessary to develop a technology that can solve the above-mentioned shortcomings of conventional methods. The purpose of this invention is to provide a teaching limb device that can be quickly and easily disassembled and used to evaluate the results of plaster cutting. It combines the advantages of a teaching limb device that allows for easy retraction of the plaster components and assists in evaluating cutting results. In particular, this invention aims to solve the problems of difficulty in disassembly, which can affect teaching progress, and difficulty in evaluating cutting results. The technical solution to the above problems is to provide a teaching limb device that can be quickly and easily disassembled and whose plaster cutting results can be evaluated, comprising: A modular hand mold assembly comprises a front section, a rear section, and a mating surface. The front section includes a finger and palm shaping portion, a first mating surface, and a first hole. The first hole is recessed into the first mating surface. The rear section includes an arm shaping portion, a second mating surface, an outer end face of the hand mold, a hand mold channel, and a fixing element. The second mating surface corresponds to the first mating surface and is located on the arm shaping portion. The hand mold channel passes through the arm shaping portion and connects the second mating surface and the outer end face of the hand mold. The fixing element passes through the hand mold channel from the outer end face of the hand mold and is fixed to the first hole, thus fixing the front section and the rear section into a single structure. The mating surface is disposed on one of the front section and the rear section, and the mating surface has a second hole. A modular thumb mold portion is provided corresponding to a modular hand mold portion; the modular thumb mold portion has a thumb shaping portion, a thumb engaging end face, a thumb outer end face, a thumb channel, and a thumb fixing element; the thumb engaging end face is located on the thumb shaping portion corresponding to the engaging surface; the thumb channel passes through the thumb shaping portion and connects the thumb engaging end face and the thumb outer end face; the thumb fixing element is used to pass through the thumb channel and fix it to the second hole, so that the modular thumb mold portion and the modular hand mold portion are fixed as the teaching limb device; A plaster component is provided corresponding to the combined hand mold portion and the combined thumb mold portion; the plaster component has a protective layer and a plaster layer; the protective layer covers at least the combined hand mold portion, and the plaster layer covers the protective layer; and At least one pressure sensing component is fixed to the combined hand mold portion and placed within the protective layer. The above-mentioned objects and advantages of the present invention will be readily understood from the following detailed description and accompanying drawings of the selected embodiments. The present invention will now be described in detail with reference to the following embodiments and accompanying drawings: Referring to Figures 1A, 1B, 2, 3, 4A, 4B, and 5, the present invention is a teaching limb device that can be quickly and easily disassembled and used to evaluate the results of plaster cutting, comprising: A combined hand mold portion 10 has a front section 11, a rear section 12, and a mating surface 13. The front section 11 has a finger and palm shaping portion 111, a first mating surface 112, and a first hole 113. The first hole 113 is recessed from the first mating surface 112. The rear section 12 has an arm shaping portion 121, a second mating surface 122, a hand mold outer end face 123, a hand mold channel 124, and a fixing element 125. The second mating surface 122 corresponds to the first mating surface 112 and is located on the arm shaping portion 121. The hand mold channel 124 passes through the arm shaping portion 121 and connects the second mating surface 122 and the outer end face 123 of the hand mold. The fixing element 125 is used to pass through the hand mold channel 124 from the outer end face 123 of the hand mold and is fixed in the first hole 113, so that the front section 11 and the rear section 12 are fixed as a single structure. The mating surface 13 is provided on one of the front section 11 (as shown in Figure 1A) and the rear section 12 (as shown in Figure 1B), and the mating surface 13 has a second hole 132 (as shown in Figure 2). A modular thumb mold portion 20 is provided corresponding to the modular hand mold portion 10. The modular thumb mold portion 20 has a thumb shaping portion 21, a thumb engaging end face 22, a thumb outer end face 23, a thumb channel 24, and a thumb fixing element 25. The thumb engaging end face 22 is located on the thumb shaping portion 21 corresponding to the engaging surface 13. The thumb channel 24 passes through the thumb shaping portion 21 and connects the thumb engaging end face 22 and the thumb outer end face 23. The thumb fixing element 25 passes through the thumb channel 24 and is fixed to the second hole 132, so that the modular thumb mold portion 20 and the modular hand mold portion 10 are fixed as the teaching limb device. A plaster component 30 is provided corresponding to the combined hand mold portion 10 and the combined thumb mold portion 20. The plaster component 30 has a protective layer 31 and a plaster layer 32; the protective layer 31 covers at least the combined hand mold portion 10 (as shown in Figures 4B and 6A), and the plaster layer 32 covers the protective layer 31. At least one pressure sensing component 40 is fixed to the combined hand mold part 10 and placed inside the protective layer 31. In practice, the protective layer 31 can be at least one of a cotton layer 311 or a plaster stocking 312. That is, it usually has the following two forms: [a] Single-layer type: At this point, referring to Figures 4B and 6A, the protective layer 31 is entirely composed of the cotton layer 311. During the plastering process, the cotton layer 311 covers at least the combined hand mold portion 10, and then the plaster layer 32 is applied over the cotton layer 311. [b]Dual-layer form: Referring to Figure 4C, the protective layer 31 is composed of the cotton layer 311 and the plaster stocking 312. During the plastering process, the plaster stocking 312 is first wrapped around the combined hand mold portion 10 (located on the at least one pressure sensing component 40); then, the cotton layer 311 is wrapped around the plaster stocking 312; finally, the plaster layer 32 is wrapped around the cotton layer 311. The at least one pressure sensing component 40 can be used in the following two applications: [a] At least one pressure-sensitive device 41 and a signal receiving device 42 (see Figure 4B). The at least one pressure-sensitive device 41 may be, for example, a pressure sensor, or a complex array of distributed sensing units. The at least one pressure-sensitive device 41 can be used to determine whether the pressure is greater than a reference value. Furthermore, the complex array-distributed sensing unit can determine the two-dimensional distribution state of pressure. The signal receiving device 42 is used to receive data sensed and judged by the at least one pressure-sensitive device 41. [b] A carbon paper 43 and two copy sheets 44 (as shown in Figure 5). The two copy sheets 44 are located on both sides of the carbon paper 43. When the carbon paper 43 senses an external contact (pressure), at least one copy mark is generated on at least one of the two copy sheets 44. The at least one copy mark can also be used to determine whether the pressure is greater than the reference value, or to determine the two-dimensional distribution of the pressure. The usage method in this case is as follows: First, the fixing element 125 is passed through the hand mold channel 124 and fixed to the first hole 113, so that the front part 11 and the rear part 12 are fixed into a whole structure, thus completing the combined hand mold part 10. Next, the thumb fixing element 25 is passed through the thumb channel 24 and fixed to the second hole 132, so that the combined thumb mold part 20 and the combined hand mold part 10 are fixed into an integral structure. Next, first, fix at least one pressure sensing component 40 to the combined hand mold portion 10, and then cover the at least one pressure sensing component 40 and the combined hand mold portion 10 with the plaster component 30. For this part, medical and nursing-related department interns can first cover the combined hand mold portion 10 (and the at least one pressure sensing component 40) with the protective layer 31, and then cover the protective layer 31 with the plaster layer 32 (refer to Figure 4B or 4C), thus completing the plaster application teaching internship. In practice, the pressure sensing component 40 (more specifically, the two pressure-sensing devices 41) is usually provided in pairs, spaced 180 degrees apart. Once the plaster component 30 is fixed in shape, the plaster can be disassembled for instruction (refer to Figures 6A and 6B). At this time, a sawing device 91 can be set up to saw the plaster component 30. The key point is that when the sawing device 91 cuts through the plaster component 30, the pressure sensing component 40 (more specifically, the dual pressure sensing device 41) can be used to determine whether the contact pressure of the sawing device 91 is greater than the reference value (meaning that it may have cut the teaching limb device), or to determine the two-dimensional distribution of the pressure (e.g., whether the entire sawing path is correct or deviated), which can be used to help evaluate whether the cutting results pass the teaching practice. Furthermore, if the plaster component 30 cannot be easily detached from the teaching limb device by sawing, the thumb fixing element 25 can be detached separately, and the combined thumb mold portion 20 can be detached from the combined hand mold portion 10, thus allowing the plaster component 30 to be removed in the reverse direction. Then, the fixing element 125 can be detached, allowing the front section 11 and the rear section 12 to be separated from each other from side to side, again removing the plaster component 30 in the reverse direction. In this way, the teaching limb device can still be easily detached from the plaster component 30 without affecting the teaching progress. It is worth noting that, in the current medical system, plaster cast training often uses traditional prosthetic hands for instruction and practice. However, once a plaster cast is applied, it is not easy to disassemble and separate the traditional prosthetic hand due to the plaster covering. In addition, interns may sometimes be unable to successfully complete the plaster cast removal training. Suppose there are 40 groups of interns, with 5 groups teaching each time, for a total of 8 sessions. If one or more groups fail to remove the plaster casts each time, the next group will be unable to teach. In this case, the teacher may have to remove the casts themselves, which will also affect the teaching progress. This case addresses the aforementioned issues and has the following two characteristics: [a] The plaster cast assembly can be detached in reverse to reduce the impact on teaching progress: In this case, the thumb fixing element 25 can be detached first (refer to the component correspondence in Figure 1A), and then the combined thumb mold 20 can be detached from the combined hand mold 10, thus detaching the plaster cast assembly 30 in reverse. Next, the fixing element 125 can be detached, and the front part 11 and the rear part 12 can be detached relative to each other, thus detaching the plaster cast assembly 30 in reverse. In this way, even if the plaster cast assembly 30 cannot be successfully cut and detached from the teaching limb device, the teaching limb device can be separated and the plaster cast assembly 30 can be detached in reverse. The intern can complete the task without the teacher's intervention, thus reducing the impact on teaching progress. [b] Assessment of whether the internship is qualified: In this case, at least one pressure sensing component 40 (refer to the component correspondence in Figure 4B or Figure 4C) can be fixed to the combined hand mold part 10. Then, the protective layer 31 and the plaster layer 32 are wrapped on the combined hand mold part 10 in sequence. After the plastering teaching is completed, the plaster removal teaching can be carried out. Then, when the sawing device 91 cuts the plaster component 30, as long as the sawing device 91 cuts through the plaster component 30 and contacts the pressure sensing component 40, the pressure sensing component 40 can be used to determine whether the contact pressure of the sawing device 91 is greater than the reference value (if it is greater, it means that the teaching limb device may be cut), or can determine the two-dimensional distribution state of the pressure (for example, whether the entire sawing movement path is correct or deviated), and can be recorded by the signal receiving device 42 to help evaluate the cutting results and to help evaluate whether the cutting results pass the teaching internship. The advantages and benefits of this case can be summarized as follows: [1] The teaching limb device can be easily detached from the plaster component in reverse. In this case, the thumb fixing element can be removed, and then the combined thumb mold part can be removed from the combined hand mold part, thus detaching the plaster component in reverse (achieving the same result of removing the plaster). Next, the fixing element can be removed, and the front part and the rear part can be separated from each other (left and right), thus detaching the plaster component in reverse (achieving the same result of removing the plaster). That is, even if the plaster component cannot be removed from the teaching limb device by sawing, the teaching limb device can still be separated and detached from the plaster component in reverse. Therefore, the teaching limb device can be easily detached from the plaster component in reverse. [2] It can assist in evaluating the cutting results. In this case, at least one pressure sensing component can be fixed to the combined hand mold part, and then the protective layer and the plaster layer can be successively wrapped on the combined hand mold part. When the plastering teaching is completed and the plastering disassembly teaching is carried out, and the plaster component is sawed by the sawing device, as long as the sawing device cuts through the plaster component and contacts the pressure sensing component, the pressure sensing component can be used to determine whether the contact pressure of the sawing device is greater than the reference value (meaning that the teaching limb device may be cut), or can determine the two-dimensional distribution state of the pressure (for example, whether the entire sawing movement path is correct or deviated, and can be recorded by the signal receiving device). Therefore, it can assist in evaluating the cutting results. The above description is merely a detailed explanation of the present invention through preferred embodiments. Any simple modifications and variations made to these embodiments do not depart from the spirit and scope of the present invention. 10: Combined hand mold part; 11: Front section; 111: Finger and palm shaping section; 112: First mating surface; 113: First hole; 12: Rear section; 121: Arm shaping section; 122: Second mating surface; 123: Outer end face of hand mold; 124: Hand mold channel; 125: Fixing element; 13: Mating surface; 132: Second hole; 20: Combined thumb mold part; 21: Thumb shaping section; 22: Thumb mating end face; 23: Outer end face of thumb; 24: Thumb channel; 25: Thumb fixing element; 30: Plaster component; 31: Protective layer; 311: Cotton layer; 312: Plaster sock; 32: Plaster layer; 40: Pressure sensing component; 41: Pressure sensing device; 42: Signal receiving device; 43: Carbon paper; 44: Copy paper; 91: Sawing device. Figure 1A is a partial cross-sectional view of the first embodiment of the present invention. Figure 1B is a partial cross-sectional view of the second embodiment of the present invention. Figure 2 is a schematic diagram of a partial breakdown of Figure 1A. Figure 3 is a schematic diagram combining Figure 2. Figure 4A is a schematic diagram illustrating the correspondence of some structures in this invention. Figure 4B is a partial sectional view of the plaster application example (single-layer type) above Figure 4A. Figure 4C is a partial sectional view of the double-layered form of Figure 4B. Figure 5 is a schematic diagram of another embodiment of the pressure sensing component of the present invention. Figure 6A is a schematic diagram of the first angle of the plaster sawing instruction of the present invention. Figure 6B is a schematic diagram of the second angle of the plaster sawing instruction of the present invention. 10: Modular hand mold section 11: Front section 111: Finger and Palm Shaping Section 12: Rear section 121: Arm Styling Department 123: Outer face of the hand mold 124: Hand Model Channel 125: Fixed element 13: Joint surface 20: Combined thumb mold 21: Thumb-shaped section 22: Thumb engagement end face 23: The outer end face of the thumb 25: Thumb fixing element 30: Plaster components 31: Protective layer 32: Plaster layer 40: Pressure sensing component 41: Pressure Sensing Device 42: Signal receiving device
Claims
1. A teaching limb device that can be quickly and easily disassembled and whose plaster cutting results can be evaluated, comprising: A modular hand mold assembly comprises a front section, a rear section, and a mating surface. The front section includes a finger and palm shaping portion, a first mating surface, and a first hole. The first hole is recessed into the first mating surface. The rear section includes an arm shaping portion, a second mating surface, an outer end face of the hand mold, a hand mold channel, and a fixing element. The second mating surface corresponds to the first mating surface and is located on the arm shaping portion. The hand mold channel passes through the arm shaping portion and connects the second mating surface and the outer end face of the hand mold. The fixing element passes through the hand mold channel from the outer end face of the hand mold and is fixed to the first hole, thus fixing the front section and the rear section into a single structure. The mating surface is disposed on one of the front section and the rear section, and the mating surface has a second hole. A modular thumb mold portion is provided corresponding to the modular hand mold portion; the modular thumb mold portion has a thumb shaping portion, a thumb engaging end face, a thumb outer end face, a thumb channel, and a thumb fixing element; the thumb engaging end face is located on the thumb shaping portion corresponding to the engaging surface; the thumb channel passes through the thumb shaping portion and connects the thumb engaging end face and the thumb outer end face; the thumb fixing element is used to pass through the thumb channel and fix it to the second hole, so that the modular thumb mold portion and the modular hand mold portion are fixed as the teaching limb device; a plaster assembly is provided corresponding to the modular hand mold portion and the modular thumb mold portion; the plaster assembly has a protective layer and a plaster layer; the protective layer covers at least the modular hand mold portion, and the plaster layer covers the protective layer; and at least one pressure sensing component is fixed to the modular hand mold portion and placed inside the protective layer.
2. The teaching limb device as described in claim 1, which can be quickly and easily disassembled and allows for evaluation of plaster cutting results, wherein: The protective layer is a cotton layer; and the cotton layer covers at least the combined hand mold part, and the plaster layer covers the cotton layer.
3. The teaching limb device as described in claim 1, which can be quickly and easily disassembled and allows for evaluation of plaster cutting results, wherein: The protective layer comprises a cotton layer and a plaster stocking; the cotton layer covers at least the combined hand mold portion, the plaster stocking covers the cotton layer, and the plaster layer covers the plaster stocking.
4. The teaching limb device as described in claim 1, which can be quickly and easily disassembled and allows for evaluation of plaster cutting results, wherein, The at least one pressure sensing component includes at least one pressure sensing device and a signal receiving device.
5. The teaching limb device as described in claim 4, which can be quickly and easily disassembled and allows for evaluation of plaster cutting results, wherein, The at least one pressure-sensitive device is at least one of a pressure sensor or a complex array distributed sensing unit.
6. The teaching limb device as described in claim 5, which can be quickly and easily disassembled and allows for evaluation of plaster cutting results, wherein: The at least one pressure-sensitive device is used to determine whether the contact pressure of a sawing device during sawing is greater than a reference value; and the signal receiving device is used to receive the data sensed and determined by the at least one pressure-sensitive device.
7. The teaching limb device as described in claim 5, which can be quickly and easily disassembled and allows for evaluation of plaster cutting results, wherein, The complex array-distributed sensing unit is used to determine the two-dimensional distribution of the contact pressure during sawing by a sawing device.
8. The teaching limb device as described in claim 5, which can be quickly and easily disassembled and allows for evaluation of plaster cutting results, wherein: The at least one pressure sensing component includes a carbon paper and two copies; and the two copies are respectively located on two sides of the carbon paper. The carbon paper is used to sense the contact pressure of a sawing device making a sawing operation and to produce at least one copy mark on at least one of the two copies.
9. The teaching limb device as described in claim 8, which can be quickly and easily disassembled and allows for evaluation of plaster cutting results, wherein: The at least one copy mark is used to determine whether the contact pressure is greater than a reference value, and to determine the two-dimensional distribution state of the contact pressure.