Joint motion range limiter of human lower limb skeleton model
By designing the joint mobility limiter for the human lower limb bone model, the femoral model is limited and fixed using structures such as arc grooves, drums and tooth blocks, the problem of model instability is solved and the teaching quality and user experience are improved.
Patent Information
- Application Number
- CN202422425915.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-10-09
AI Technical Summary
The existing human lower limb skeleton models lack limits and fixed structures during teaching use, resulting in instability of the model and affecting the learning effect and teaching quality.
A joint motion limiter including a femoral model and a tibial model is designed. Through the coordination of structures such as the first arc groove, the rotor, the second arc groove and the tooth block, the limit and fixation of the femoral model's movement angle is achieved, and the spring reset mechanism is used to ensure the stability of the model in a predetermined position.
It effectively limits the activity angle of the femoral model, conforms to the physiological structure of the human body, improves the teaching quality and learning effect, and ensures the stability of the model during use.
Smart Images
Figure CN223205951U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of skeleton model teaching aids, in particular to a joint range of motion limiter of a human lower limb skeleton model. Background Art
[0002] The human lower limb skeleton model is a three-dimensional model used to display and study the skeletal structure of the human lower limb (including the thigh, knee, leg and foot). It is commonly used in fields such as medicine, anatomy, education and sports science to help students and professionals understand the skeletal structure, joint movement and related muscle and ligament combinations of the lower limb.
[0003] When existing human lower limb skeleton models are used in teaching, the characteristics of the bones are generally observed from different angles through operations such as rotation and scaling, thereby enhancing students' spatial perception ability. However, most existing models do not have a structure to limit and fix the skeleton model when in use, which may cause students to produce incorrect positions or shapes of the skeleton model due to insufficient knowledge reserves. At the same time, when using a model that is not limited and fixed, students may feel troubled or uneasy due to the instability of the model, thereby reducing learning effects and teaching quality. Therefore, a joint range of motion limiter for a human lower limb skeleton model is proposed to solve the problems raised in the background technology. Utility Model Content
[0004] In order to solve the problems raised in the above background technology, the utility model provides a joint range of motion limiter for a human lower limb skeleton model, which has the advantage of conveniently limiting and fixing the skeleton model, thereby improving the teaching quality.
[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: A joint range of motion limiter for a human lower limb skeleton model, comprising a femur model and a tibial model, wherein the outer wall of the femur model is fixedly connected to a first round rod, the outer side of the tibial model is fixedly connected to a support frame, the surface of the support frame is provided with a first arc groove, the middle part of the inner cavity of the support frame is movably connected to a knob, the outer wall of the knob is fixedly connected to a connecting rod, the inner part of the knob is movably connected to a limiting circular block, the outer wall of the limiting circular block is provided with a second round rod in an annular shape at 180 degrees, the inner part of the knob is movably connected to a rotating cylinder, the inner wall of the rotating cylinder is provided with a guide groove in an annular shape at 180 degrees, the side of the rotating cylinder away from the limiting circular block is provided with a second arc groove in an annular shape at 180 degrees, the inner part of the second arc groove is movably clamped with a third round rod, the end of the third round rod away from the rotating cylinder is fixedly connected to a tooth block, and the middle part of the inner cavity of the support frame is fixedly connected to a gear plate.
[0006] Preferably, the tibial model is hinged to the first round rod, the first round rod is movably engaged in the interior of the first arcuate groove, and the arc of the first arcuate groove is one hundred and fifty degrees.
[0007] Preferably, the end of the connecting rod away from the knob is fixedly connected to the first round rod, and the end of the limiting round block away from the rotating cylinder passes through the outer wall of the knob and extends to the outside of the knob.
[0008] Preferably, a spring fixed to the support frame is fixedly connected to one side of the limiting circular block, and the spring is used to squeeze the limiting circular block and keep the limiting circular block moving toward the outside of the knob.
[0009] Preferably, the second round rod is movably clamped in the interior of the rotating drum, and the arc angles of the rotating drum and the second arc-shaped groove are both ninety degrees.
[0010] Preferably, opposite ends of the two tooth blocks penetrate the outer wall of the knob and extend to the outside of the knob, and the tooth blocks are engaged with the gear plate in an initial state.
[0011] Preferably, a straight slot is provided on the inner wall of the knob, and the straight slot is used to circumferentially limit the third round rod when the drum rotates.
[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0013] The utility model is provided with a first arc groove, a rotating cylinder, a second arc groove and a tooth block and other structures to facilitate limiting and fixing the angle of the femoral model movement. The first round rod moves inside the first arc groove, so that the first round rod can only drive the femoral model to rotate a maximum of one hundred and fifty degrees, which conforms to the normal physiological structure of the human body and limits the angle of the femoral model movement. After the femoral model is rotated to a predetermined position, the limiting round block is reset under the action of the spring force, and the second round rod and the guide groove cooperate to drive the rotating cylinder to rotate in the opposite direction, so that the second arc groove drives the third round rod and the tooth block thereon to move toward the gear plate until the tooth block is engaged with the gear plate, thereby fixing the position of the knob after rotation, thereby achieving the effect of fixing the angle of the femoral model after movement. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the overall structure of the utility model;
[0015] Figure 2 This is a schematic diagram of the side cross-section structure of the support frame of the utility model;
[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle;
[0017] Figure 4 This is a schematic diagram of the front cross-section structure of the gear plate of the utility model;
[0018] Figure 5 This is a schematic diagram of the positional relationship among the limiting circular block, the spring, the second arc-shaped groove and the tooth block of the utility model.
[0019] In the figure: 1. Femoral model; 2. Tibia model; 3. First round rod; 4. Support frame; 5. First arc groove; 6. Knob; 7. Connecting rod; 8. Limiting round block; 9. Second round rod; 10. Spring; 11. Rotating cylinder; 12. Guide groove; 13. Second arc groove; 14. Third round rod; 15. Tooth block; 16. Straight slot; 17. Gear plate. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0021] like Figures 1 to 5 As shown, the utility model provides a joint range of motion limiter of a human lower limb skeleton model, comprising a femur model 1 and a tibial model 2, the outer wall of the femur model 1 is fixedly connected to a first round rod 3, the outside of the tibial model 2 is fixedly connected to a support frame 4, a surface of the support frame 4 is provided with a first arc groove 5, the middle part of the inner cavity of the support frame 4 is movably connected to a knob 6, the outer wall of the knob 6 is fixedly connected to a connecting rod 7, the inner part of the knob 6 is movably connected to a limiting circular block 8, the outer wall of the limiting circular block 8 is provided with a second round rod 9 in a ring shape of 180 degrees, the inner part of the knob 6 is movably connected to a rotating cylinder 11, the inner wall of the rotating cylinder 11 is provided with a guide groove 12 in a ring shape of 180 degrees, the side of the rotating cylinder 11 away from the limiting circular block 8 is provided with a second arc groove 13 in a ring shape of 180 degrees, the inner part of the second arc groove 13 is movably clamped with a third round rod 14, the end of the third round rod 14 away from the rotating cylinder 11 is fixedly connected to a tooth block 15, and the middle part of the inner cavity of the support frame 4 is fixedly connected to a gear plate 17.
[0022] The above scheme is adopted: the first round rod 3 is moved inside the first arc groove 5, so that the first round rod 3 can only drive the femoral model 1 to rotate a maximum of one hundred and fifty degrees, which is in line with the normal physiological structure of the human body. At the same time, the angle of movement of the femoral model 1 is limited. After the femoral model 1 is rotated to the predetermined position, the limiting round block 8 is reset under the action of the elastic force of the spring 10, and the second round rod 9 cooperates with the guide groove 12 to drive the rotating cylinder 11 to rotate in the opposite direction, so that the second arc groove 13 drives the third round rod 14 and the tooth block 15 thereon to move toward the gear plate 17 until the tooth block 15 is engaged with the gear plate 17, thereby fixing the position of the knob 6 after rotation, thereby achieving the effect of fixing the angle of the femoral model 1 after movement.
[0023] like Figures 1 to 5 As shown, the tibial model 2 and the first round rod 3 are hinged, the first round rod 3 is movably clamped inside the first arc groove 5, the arc of the first arc groove 5 is one hundred and fifty degrees, the end of the connecting rod 7 away from the knob 6 is fixedly connected to the first round rod 3, and the end of the limiting circle 8 away from the rotating cylinder 11 passes through the outer wall of the knob 6 and extends to the outside of the knob 6.
[0024] The above scheme is adopted: the arc angle of the first arc groove 5 is one hundred and fifty degrees. Its function is that, under normal physiological conditions, the femoral model 1, the tibial model 2 and the patella form a knee joint, thereby participating in the rotational movement of the knee joint. However, the bending angle of the knee joint has a certain limit range, roughly between 120° and 150°. Therefore, the arc angle of the first arc groove 5 is one hundred and fifty degrees, so that the first round rod 3 can only drive the femoral model 1 to rotate a maximum of one hundred and fifty degrees, thereby achieving the limit of the rotation angle of the femoral model 1.
[0025] like Figures 2 to 5 As shown, one side of the limiting circular block 8 is fixedly connected to a spring 10 fixed to the support frame 4. The spring 10 is used to squeeze the limiting circular block 8 and keep the limiting circular block 8 moving toward the outside of the knob 6. The second round rod 9 is movably clamped in the inside of the rotating drum 11. The arc of the rotating drum 11 and the second arc groove 13 are both ninety degrees. The opposite ends of the two tooth blocks 15 pass through the outer wall of the knob 6 and extend to the outside of the knob 6. The tooth blocks 15 are engaged with the gear plate 17 in the initial state. A straight slot 16 is provided on the inner wall of the knob 6. The straight slot 16 is used to circumferentially limit the third round rod 14 when the rotating drum 11 rotates.
[0026] Adopting the above solution: through the design of the spring 10, its function is that when the pressure on the limit circle 8 is released, the limit circle 8 will be reset under the action of the elastic force of the spring 10, thereby facilitating the operator's use next time and ensuring the normal operation of the device.
[0027] When the second rod 9 abuts against the inner wall of the guide groove 12, the third rod 14 drives the tooth block 15 at one end thereof to move in the same direction. When the second rod 9 abuts against the inner wall of the guide groove 12, the third rod 14 drives the tooth block 15 to completely retract into the interior of the knob 6, thereby releasing the engagement between the tooth block 15 and the gear plate 17, thereby releasing the fixation of the knob 6 position. Finally, the operator rotates the knob 6, thereby driving the first rod 3 to slide along the trajectory of the first arc groove 5 through the connecting rod 7. When the first rod 3 rotates, the femoral model 1 is driven to perform simulated movement.
[0028] When the femoral model 1 rotates to the predetermined position, the operator releases the pressure on the limiting block 8, so that the limiting block 8 drives the second round rod 9 to reset under the action of the elastic force of the spring 10, and then the second round rod 9 drives the rotating cylinder 11 to rotate in the opposite direction along the trajectory of the guide groove 12. While the rotating cylinder 11 rotates in the opposite direction, the cooperation between the second arc groove 13 and the third round rod 14 drives the two tooth blocks 15 to move in the opposite direction, and then the tooth blocks 15 are re-engaged with the gear plate 17, thereby fixing the position of the knob 6 after rotation, thereby achieving the effect of limiting the angle of the femoral model 1 after activity.
[0029] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.
[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A joint range of motion limiter for a human lower limb skeleton model, comprising a femur model (1) and a tibia model (2), characterized in that: The outer wall of the femoral model (1) is fixedly connected to a first round rod (3), the outer part of the tibial model (2) is fixedly connected to a support frame (4), the surface of the support frame (4) is provided with a first arc groove (5), the middle part of the inner cavity of the support frame (4) is movably connected to a knob (6), the outer wall of the knob (6) is fixedly connected to a connecting rod (7), the inner part of the knob (6) is movably connected to a limited circular block (8), the outer wall of the limited circular block (8) is provided with a second round rod (9) in an annular shape of 180 degrees, the knob ( 6) is movably connected to a rotating drum (11), the inner wall of the rotating drum (11) is provided with a guide groove (12) in an annular shape at a 180-degree angle, a second arc-shaped groove (13) is provided in an annular shape at a 180-degree angle on the side of the rotating drum (11) away from the limiting circular block (8), a third round rod (14) is movably engaged with the inner part of the second arc-shaped groove (13), one end of the third round rod (14) away from the rotating drum (11) is fixedly connected to a tooth block (15), and a gear plate (17) is fixedly connected to the middle part of the inner cavity of the support frame (4).
2. The joint range of motion limiter for a human lower limb skeleton model according to claim 1, characterized in that: The tibial model (2) and the first round rod (3) are hinged, and the first round rod (3) is movably clamped inside the first arc groove (5), and the arc of the first arc groove (5) is one hundred and fifty degrees.
3. The joint range of motion limiter for a human lower limb skeleton model according to claim 1, characterized in that: The end of the connecting rod (7) away from the knob (6) is fixedly connected to the first round rod (3), and the end of the limiting round block (8) away from the rotating cylinder (11) passes through the outer wall of the knob (6) and extends to the outside of the knob (6).
4. The joint range of motion limiter for a human lower limb skeleton model according to claim 1, wherein: One side of the limiting circular block (8) is fixedly connected to a spring (10) fixed to the support frame (4), and the spring (10) is used to squeeze the limiting circular block (8) and keep the limiting circular block (8) moving toward the outside of the knob (6).
5. The joint range of motion limiter for a human lower limb skeleton model according to claim 1, characterized in that: The second round rod (9) is movably clamped inside the rotating drum (11), and the arc angles of the rotating drum (11) and the second arc-shaped groove (13) are both ninety degrees.
6. The joint range of motion limiter for a human lower limb skeleton model according to claim 1, wherein: The opposite ends of the two tooth blocks (15) penetrate the outer wall of the knob (6) and extend to the outside of the knob (6). In the initial state, the tooth blocks (15) are engaged with the gear plate (17).
7. The joint range of motion limiter for a human lower limb skeleton model according to claim 1, wherein: A straight notch (16) is provided on the inner wall of the knob (6), and the straight notch (16) is used to circumferentially limit the third round rod (14) when the rotating drum (11) rotates.