CN112432795A - Dummy for children - Google Patents
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- CN112432795A CN112432795A CN202011504389.5A CN202011504389A CN112432795A CN 112432795 A CN112432795 A CN 112432795A CN 202011504389 A CN202011504389 A CN 202011504389A CN 112432795 A CN112432795 A CN 112432795A
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- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
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- G01M17/0078—Shock-testing of vehicles
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Abstract
The invention provides a child dummy, which comprises a head, shoulder joints, a trunk, thighs, shanks, a big arm, a small arm, hip joints, knee joints and simulation skin, wherein the head is fixedly connected with the trunk, the trunk is connected with the big arm through the shoulder joints, the trunk is connected with the thighs through the hip joints, the thighs are connected with the shanks through the knee joints, and the big arm is connected with the small arm; the simulated skin is laid on the head, the trunk, the thighs, the crus, the upper arms and the lower arms; the simulated skin comprises a surface layer, a supporting layer and a connecting layer; the torso has a first center of gravity adjustment mechanism therein. The invention accords with the appearance characteristics, the mass distribution characteristics and the joint movement characteristics of the children aged three in China at the present stage, and can better reflect the real biomechanical characteristics of the children aged three in China; biomechanical evaluation can be realized during product safety evaluation of the three-year-old children based on ergonomic test requirements, and particularly, three-dimensional motion tracks, human-computer interaction force and the like of the three-year-old children during tests such as toppling or falling can be objectively and truly reproduced.
Description
Technical Field
The invention belongs to the technical field of ergonomic experimental tests, and particularly relates to a child dummy, in particular to a child dummy for ergonomic tests.
Background
In ergonomic testing experiments or studies, it is often necessary to perform a large number of experiments, and it is not advisable to perform the tests directly on a real person for health and safety reasons. The dummy is used for carrying out the ergonomic test, so that the influence of individual difference on an experimental result can be eliminated, the problems of repeated selection of experimenters and the like can be effectively solved, the experimental period is shortened, the experimental cost is reduced, and the dummy has high accuracy and good repeatability.
At present, because data acquisition of children at low ages is difficult, a high-simulation physical structure model which is used for safety assessment of children consumer goods and accords with physical sign size and weight data of three-year-old children in China does not exist in China at present. In the field of automobile collision, the child dummy purchased by China in a foreign import mode and applied to safety assessment is widely applied to automobile collision tests, the price is very high, and related physiological parameters of the child dummy are different from those of children in China. When the safety detection and evaluation of the children consumer goods are carried out, China does not have a child dummy which accords with the physiological characteristics of China children at present, the requirements of different fields on the dummy are different, at present, no related ergonomic evaluation dummy which can truly reflect the appearance and the body quality of China children in three years old exists in the ergonomic field, in the ergonomic evaluation work of related human-machine geometric suitability, mechanical suitability, use safety and the like, plastic and textile children dummy, even sandbags, hard humanoid water tanks and the like are adopted in some tests, and the dummy can not reflect the physiological characteristics and the human-machine interactive response of real human bodies, so that the detection result has larger difference with the experimental result in a real use scene, and certain difficulty is caused for the safety evaluation and quality supervision of the children products.
Therefore, it is necessary and important to develop a standardized safety assessment dummy meeting the characteristics of children in China, and it is urgently needed to manufacture a simulation test dummy meeting the physical signs (body size and weight distribution) of children in China based on the requirements of consumer product safety and functional analysis work, and the simulation test dummy is used for research on the injury mechanism of children falling and collision during foreseeable and reasonable abuse of children products, injury accident simulation and product safety evaluation.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a child dummy for an efficacy test in order to provide an experimental institution with a high-simulation physical structure model which can meet the size and weight data of physical signs of children three years old in China.
The child dummy provided by the invention has basic physical signs of the child, including head, neck, chest, abdomen, pelvis, upper arm, forearm, hand, thigh, shank and foot; the physical sign data of Chinese children are adopted in the overall dimension, the sitting posture and the standing posture can be structurally maintained, and the hands and the feet can simulate the grabbing and treading of the children during climbing; the outer skin and the filler are made of elastic materials, so that the joint structure can bear high-strength mechanical injuries such as falling, smashing and the like, and the joint structure is durable and can not be damaged or deformed.
In order to achieve the above purpose, the invention adopts the following technical scheme.
A child dummy comprises a head (1), shoulder joints (2), a trunk (3), thighs (4), shanks (5), a big arm (6), a small arm (7), hip joints (8), knee joints (9) and simulation skins (10), wherein the head (1) is fixedly connected with the trunk (3), the trunk (3) is connected with the big arm (6) through the shoulder joints (2), the trunk (3) is connected with the thighs (4) through the hip joints (8), the thighs (4) are connected with the shanks (5) through the knee joints (9), and the big arm (6) is connected with the small arm (7); the simulated skin (10) is laid on the head (1), the trunk (3), the thighs (4), the shanks (5), the big arm (6) and the small arm (7);
the simulated skin comprises an epidermal layer (101), a support layer (102) and a connecting layer (103);
the trunk (3) is internally provided with a first gravity center adjusting mechanism.
Preferably, the epidermal layer of the simulated skin is a silica gel layer, and the support layer is a glass fiber reinforced plastic layer.
Preferably, the shoulder joint (2) comprises: a first connecting plate (21), a friction plate (22), a second connecting plate (23), a first rotating shaft (24), and a second rotating shaft (25); the first connecting plate is connected with the inner framework of the trunk, and the second connecting plate is respectively connected with the left shoulder joint and the right shoulder joint, so that the shoulder joints rotate around the axes of the first rotating shaft and the second rotating shaft.
Preferably, the hip joint comprises: the friction plate is arranged on the first connecting plate; the trunk and the thighs are connected through two connecting plates of the hip joint, so that the trunk and the thighs can rotate relatively.
Preferably, the knee joint comprises: the first connecting plate and the second connecting plate are respectively connected with thighs and shanks through bolts.
Preferably, the first connecting plate and the second connecting plate of the hip joint are respectively connected with the knee joints of the thighs and the calves through bolts, and threaded holes are formed in the knee joints of the thighs and the calves to be matched with the knee joints of the thighs and the calves; the first connecting plate and the second connecting plate determine the distance between the first connecting plate and the second connecting plate through positioning rings, and the first connecting plate, the second connecting plate, the positioning rings and the damping friction plates are connected through nuts by a rotating shaft; and a damping friction plate is arranged between the first connecting plate and the nut.
Preferably, one or a combination of the head, the thigh, the calf, the upper arm and the lower arm is provided with a second gravity center adjusting mechanism;
the second gravity center adjusting mechanism comprises a balancing weight (41), a threaded connecting rod (42) and a set screw (43); the end part of the threaded connecting rod (42) is provided with threads; the balancing weight (41) is provided with a through hole for the threaded connecting rod (42) to pass through and a positioning hole for the fastening screw (43) to be screwed in; the positioning hole is vertically communicated with the through hole; the inner wall of the positioning hole is provided with an internal thread matched with the external thread of the set screw (43); the threaded connecting rod (42) is arranged in the through hole in a penetrating mode, and the set screw (43) is used for locking the position of the balancing weight (41).
Preferably, the first gravity center adjusting mechanism comprises a balancing weight, a threaded connecting rod and a set screw; the end part of the threaded connecting rod is provided with threads; the balancing weight is provided with a through hole for the threaded connecting rod to pass through and a positioning hole for the fastening screw to be screwed in; the positioning hole is vertically communicated with the through hole; the inner wall of the positioning hole is provided with an internal thread matched with the external thread of the set screw; the threaded connecting rod penetrates through the through hole, and the set screw is used for locking the position of the balancing weight.
Preferably, the first center of gravity adjusting mechanism includes: a Z-direction gravity center adjusting mechanism, a Y-direction gravity center adjusting mechanism and an X-direction gravity center adjusting mechanism; the X direction, the Y direction and the Z direction are mutually vertical.
Preferably, the Z-direction gravity center adjusting mechanism consists of a Z-direction guide rod, a gear shaft and a Z-direction balancing weight; one end of the Z-direction guide rod is provided with a thread and is connected with the trunk, and the two ends of the gear shaft are connected with the trunk; the end part of the Z-direction balancing weight is provided with teeth meshed with the gear shaft, and the inside of the Z-direction balancing weight is provided with a unthreaded hole for the Z-direction guide rod to pass through;
the X-direction gravity center adjusting mechanism consists of an X-direction balancing weight, an X-direction guide rod and an X-direction screw rod; a hole for the X guide rod to pass through and a threaded hole matched with the X-direction screw rod are formed in the X-direction balancing weight; the X-direction guide rod and the X-direction screw rod are respectively connected with the trunk;
the Y-direction gravity center adjusting mechanism consists of a Y-direction guide rod, a Y-direction screw rod and a Y-direction balancing weight; a hole for the Y guide rod to pass through and a threaded hole matched with the Y-direction screw rod are formed in the Y-direction balancing weight; the Y-direction guide rod and the Y-direction screw rod are respectively connected with the trunk.
Compared with the prior art, the invention has the following beneficial effects:
the child dummy provided by the invention is suitable for performing the ergonomic test of children's consumer goods, is a high-simulation physical structure model which accords with the physical sign size and weight data of a 3-year-old child in China, can simulate the activities of hands, feet and heads of the child, and simulate the activities of grasping, climbing and the like of the child, and has the following advantages:
in terms of safety, ergonomic studies usually require extensive experimentation, and it is not advisable to test directly with real persons for health and safety reasons. The dummy is used for carrying out the ergonomic test, so that the influence of individual difference on an experimental result can be eliminated, the problems of repeated selection of experimenters and the like can be effectively solved, the experimental period is shortened, the experimental cost is reduced, and the dummy has high accuracy and good repeatability.
The invention is based on the latest acquired physiological parameter data of the Chinese three-year-old child, accords with the appearance characteristics, the mass distribution characteristics and the joint activity characteristics of the Chinese three-year-old child at the present stage, and can better reflect the real biomechanical characteristics of the Chinese three-year-old child; the biomechanical evaluation requirement during product safety evaluation of the three-year-old children can be met based on the ergonomic test requirement, and particularly, the three-year-old children can objectively and really realize three-dimensional motion tracks, human-computer interaction force and the like during tests such as toppling or falling; the human-computer interaction position and the key failure point can be determined accurately and truly.
Drawings
FIG. 1 is a schematic illustration of an assembly of a child dummy according to an embodiment of the present invention;
FIG. 2 is a schematic view of a head and torso connection according to an embodiment of the present invention;
FIG. 3 is a view of a shoulder joint structure according to an embodiment of the present invention;
FIG. 4 is a diagram of a hip joint and a knee joint configuration according to an embodiment of the present invention;
FIG. 5 is a schematic view of the connection of the torso to the upper arm of the embodiment of the present invention;
FIG. 6 is a schematic view of the connection between the large arm and the small arm according to the embodiment of the present invention;
FIG. 7 is a schematic view of a torso and thigh connection according to an embodiment of the present invention;
FIG. 8 is a schematic view of a thigh and calf connection according to an embodiment of the invention;
FIG. 9 is a schematic view of a center of gravity adjustment mechanism employed in embodiments of the present invention;
FIG. 10 is a schematic view of the head center of gravity adjustment mechanism of the embodiment of the present invention installed;
FIG. 11 is a diagram of torso support layer connections according to an embodiment of the present invention;
FIG. 12 is a diagram illustrating the connection between the supporting layers of the large arm according to the embodiment of the present invention;
FIG. 13 is a diagram of the connection of the forearm support layer according to an embodiment of the invention;
FIG. 14 is a diagram of thigh support layer connections according to an embodiment of the present invention;
FIG. 15 is a diagram of a connection of a calf support layer according to an embodiment of the invention;
FIG. 16 is a schematic diagram of a simulated skin structure according to an embodiment of the invention.
FIG. 17 is a schematic view of a preferred center of gravity adjustment mechanism of an embodiment of the present invention;
FIG. 18 is a schematic view of a preferred adjustment of the center of gravity adjustment mechanism according to an embodiment of the present invention;
fig. 19 is a partial schematic view of a preferred center of gravity adjustment mechanism according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment provides a child dummy which can be used as an ergonomics testing device for children's consumer goods. The dummy is a high-simulation physical structure model which accords with the human body size and weight data of the three-year-old children in China. The external skin is made of elastic materials, and the moving range of each joint is consistent with that of children three years old in China; can be seated and stood; the joint structure can bear mechanical damage with high strength such as falling, smashing and pressing, and has durability and no damage and deformation.
In the embodiment, the child dummy is specifically applied to the ergonomics test of the child scooter, and the injury mechanism of the child when falling and colliding is researched by simulating different foreseeable reasonable abuse situations, and a corresponding test method is provided. The child dummy provided by the embodiment is simple in structure, convenient to operate, safe to use, suitable for adding different sensors and capable of simulating more complete data parameters.
The main parts assembly drawing of the child dummy provided by the embodiment is shown in fig. 1 and comprises:
a head 1, shoulder joints 2, a trunk 3, thighs 4, calves 5, a big arm 6, a small arm 7, hip joints 8, knee joints 9 and simulated skin 10;
each part of the dummy is provided with a gravity center adjusting mechanism for finely adjusting the gravity center, so that the gravity center and the quality of the human body are the same as those of a real person.
In this embodiment, the trunk 3, the thigh 4, the calf 5, the upper arm 6, and the lower arm 7 are internally provided with an internal center-of-gravity adjusting mechanism.
As shown in fig. 2, the head and torso are bolted together at the neck.
The structure of the shoulder joint 2 is shown in fig. 3 and consists of the following five parts: the damper friction plate comprises a first connecting plate 21, a damper friction plate 22, a second connecting plate 23, a first rotating shaft 24 and a second rotating shaft 25.
The first connecting plate is connected with the internal frame of the chest through bolts, the two second connecting plates 23 are connected with the shoulder part of the large arm through bolts, and the shoulder part of the large arm is provided with a threaded hole matched with the shoulder part of the large arm. A damping friction plate 22 is arranged between the second connecting plate 23 and the first rotating shaft 24, so that the second connecting plate 23 provides damping and maintains the position when driving the large arm to rotate around the second rotating shaft 25; the damping friction plate 22 is interposed between the first connecting plate 21 and the end nut of the first rotating shaft 24, so that the large arm can provide damping and position holding in the rotating body around the first rotating shaft 24. Nuts are arranged at the end parts of the first rotating shaft 24 and the second rotating shaft 25, and the damping value of the damping sheet is increased or decreased by adjusting the positions of the nuts, so that the damping is adjusted.
The hip joint 8 and the knee joint 9 have the same structure, and as shown in fig. 4, each comprises a first connecting plate 31, a damping friction plate 32, a rotating shaft 33, and a second connecting plate 34.
The first connecting plate 31 and the second connecting plate 34 of the hip joint 8 are respectively connected with the knee joints of the thigh and the shank through bolts, and the knee joints of the thigh and the shank are provided with threaded holes matched with the threaded holes. The first connecting plate 31 and the second connecting plate 34 determine the distance between the first connecting plate 31 and the second connecting plate 34 through the positioning ring, the rotating shaft 33 connects the first connecting plate 31, the second connecting plate 34, the positioning ring and the damping friction plate 32 through the nuts, the damping friction plate 32 is arranged between the first connecting plate 31 and the nuts, and the damping value of the damping plate is increased or reduced by adjusting the position of the nuts, so that the damping adjusting function is achieved.
The hip joint and the knee joint are kept consistent in structure, a first connecting plate and a second connecting plate of the hip joint are respectively connected with the trunk and the hip of the thigh, and threaded holes are formed in the corresponding positions of the trunk and the hip of the thigh to be matched with the trunk and the hip of the thigh.
The trunk and the big arm are connected through the shoulder joint 2, as shown in fig. 5, the first connecting plate is connected with the internal frame of the chest, the second connecting plate is respectively connected with the shoulder joint 2, the shoulder joint 2 can rotate around the axes of the first rotating shaft and the second rotating shaft, the friction plate provides damping, the movement of the shoulder under the condition of external force is ensured, and the external force disappears to keep the posture.
The upper arm and the lower arm can be rotatably connected through an elbow joint similar to a hip joint or a knee joint structure or through a conventional dummy elbow joint structure, and can also be connected in a simplified mode, for example, in an alternative embodiment, the upper arm and the lower arm are connected in a mode shown in figure 6, the upper arm and the lower arm are connected through pins, and the position of the rotation of the lower arm relative to the upper arm is adjusted through the tightness of adjusting pins.
The connection mode of the trunk and the thighs is shown in fig. 7, the trunk and the thighs are connected through two connecting plates of hip joints, so that the trunk and the thighs can rotate relatively, the friction plates provide damping for the mechanism, and the existing position is kept unchanged under the condition that external force disappears.
The connection mode of the thigh and the shank is shown in fig. 8, the knee joint and the hip joint adopt the same structure, the first connecting plate and the second connecting plate are respectively connected with the thigh and the shank through bolts, and the friction plates provide damping to ensure that the shank and the thigh rotate around the rotating shaft under the action of external force and are kept in position after the external force disappears.
The schematic diagram of the gravity center adjusting mechanism of the body (except for the trunk) is shown in fig. 9, and includes a weight 41, a threaded connecting rod 42, and a set screw 43.
The threaded part of the threaded connecting rod is fixed with the body structure, and the gravity center position of each part of the body is realized by adjusting the position of the balancing weight through the set screw.
The head support layer is connected in relation to one another as shown in fig. 10 and includes an adjustment mechanism 51, a head support layer 52, a connection bolt 53 and a torso support layer 54.
The supporting layer, the gravity center adjusting mechanism and the trunk supporting layer are connected through bolts.
The trunk support layer is connected to a support layer 61, an inner frame (inner layer) 62, a shoulder joint 2, a center-of-gravity adjusting mechanism 64, and a hip joint 8, as shown in fig. 11.
The supporting layer is connected with the shoulder joint through a bolt, the supporting layer is connected with the internal frame through a bolt, the hip joint is connected with the supporting layer through a bolt, and the internal frame is connected with the trunk gravity center adjusting mechanism through a bolt.
The large arm support layer is connected in relation to shoulder joint 2, large arm shoulder 72, large arm support layer 73, large arm elbow 74, and large arm gravity center adjusting mechanism 75, as shown in fig. 12.
The large arm supporting layer is connected with the large arm shoulder part, the large arm elbow part is connected through a screw, and the internal gravity center adjusting mechanism is connected with the large arm elbow part through a threaded connecting rod.
The connection relationship of the forearm support layer is shown in fig. 13, an elbow connector 81, a center of gravity adjusting mechanism 82, and a forearm support layer 83.
The forearm supporting layer is connected with the elbow connecting piece through a screw, and the gravity center adjusting mechanism is connected with the elbow connecting piece through a threaded connecting rod.
The thigh support layer connection is shown in fig. 14: thigh knee joint 91, center of gravity adjustment mechanism 92, hip joint 8, thigh support layer 94, knee joint 9.
The thigh supporting layer is respectively connected with a thigh knee connecting piece and a hip joint through screws, the thigh knee connecting piece is connected with a knee joint through screws, and the gravity center adjusting mechanism is connected with the thigh knee joint through a threaded connecting rod.
The connection relationship of the lower leg support layer is shown in fig. 15: knee joint 9, knee joint connecting piece 95, centre of gravity adjustment mechanism 96, shank supporting layer 97.
The crus supporting layer is connected with the knee joint connecting piece through a screw, the gravity center adjusting mechanism is connected with the knee joint connecting piece through a threaded connecting rod, and the knee joint is connected with the knee joint connecting piece through a screw.
The simulated skin has a three-layer structure as shown in fig. 16, and comprises an epidermal layer 101, a support layer 102 and a connecting layer 103 from the outside to the inside; the epidermal layer is a silica gel layer and can be reasonably deformed according to the design of human skin; the supporting layer is a glass fiber reinforced plastic layer, has small density and high strength and plays a supporting role; the inner layer is a connecting layer and provides support for the gravity center adjusting mechanism and the joint connection.
In a preferred embodiment, the trunk center of gravity adjusting mechanism is as shown in fig. 17, and the trunk center of gravity adjusting mechanism can be adjusted in three directions of XYZ for adjusting the total center of gravity of the child dummy. The gravity center adjusting mechanism is provided with a three-dimensional gravity center adjusting mechanism so as to adjust the gravity center of the dummy in the three X, Y and Z directions, and comprises a Z direction gravity center adjusting mechanism, a Y direction gravity center adjusting mechanism and an X direction gravity center adjusting mechanism; the X direction, the Y direction and the Z direction are mutually vertical.
The Z-direction gravity center adjusting mechanism is composed of a Z-direction guide rod 201, a gear shaft 202 and a Z-direction balancing weight 203. The connection mode is as follows: one end of the Z-guide 201 is threaded to engage with a threaded hole of the inner frame. The two ends of the gear shaft 202 are connected with the trunk supporting layer. The Z-direction balancing weight 203 is toothed at the end and meshed with the gear shaft 202, and a light hole is formed inside the Z-direction balancing weight for the Z-direction guide rod 201 to pass through.
And the Z-direction counterweight block is adjusted through the Z-direction guide rod, the gear shaft and the Z-direction counterweight block in the Z direction. The hexagonal groove in opening at the tip of gear shaft, truck one side, aim at gear shaft 202 and open the position that has hexagonal groove one end and open there is the through-hole to use interior hexagonal spanner externally to rotate, drive Z simultaneously and reciprocate to the balancing weight, realize that the focus adjusts (Z direction promptly) from top to bottom.
The X-direction gravity center adjusting mechanism is composed of an X-direction balancing weight 204, an X-direction guide rod 205 and an X-direction screw rod 206. Two holes are formed in the X-direction balancing weight 204, one hole is a light hole for the X guide rod 205 to pass through, and the other hole is a threaded hole matched with the X-direction screw rod 206. The X-direction guide 205 and the X-direction lead screw 206 are connected to the torso support layer, respectively.
The X-direction balancing weight, the X-direction guide rod and the X-direction screw rod are used for adjusting in the X direction. An inner hexagonal groove is formed in the end portion of the X-shaped screw rod, a through hole is formed in the position, aligned with the hexagonal groove, of the trunk, so that the trunk can rotate outside through an inner hexagonal wrench, meanwhile, the balancing weight is in threaded fit with the screw rod, the screw rod rotates to drive the balancing weight to move in the X direction, and the gravity center left-right adjusting effect is achieved.
The Y-direction gravity center adjusting mechanism is composed of a Y-direction guide rod 207, a Y-direction screw rod 208 and a Y-direction balancing weight 209. Two holes are formed in the Y-direction balancing weight 209, one hole is a smooth hole for the Y guide rod 207 to penetrate through, and the other hole is a threaded hole matched with the Y-direction screw rod 208. The Y-direction guide rod 207 and the Y-direction lead screw 208 are connected to the trunk support layer, respectively.
And the Y-direction counterweight block is adjusted through a Y-direction guide rod, a Y-direction screw rod and the Y-direction counterweight block in the Y direction. An inner hexagonal groove is formed in the end portion of the Y-shaped screw rod, a through hole is formed in the position, aligned with the hexagonal groove, of the trunk, so that the trunk can rotate outside through an inner hexagonal wrench, meanwhile, the balancing weight is in threaded fit with the screw rod, the screw rod rotates to drive the balancing weight to move in the Y direction, and the gravity center front-back adjusting effect is achieved.
The adjustment mode is as shown in fig. 18, when X is adjusted to the focus adjustment mechanism, through inserting spanner 210 inside the truck, open the through-hole that corresponds on the truck, X is to opening interior hexagonal groove at lead screw both ends, there is interior hexagonal boss on the spanner, X is to balancing weight and lead screw threaded connection, spanner and X are to the lead screw cooperation back, the spanner drives the lead screw clockwise or anticlockwise rotation, adjust about the balancing weight, X has the mating holes to the balancing weight on to, can guarantee balancing weight directional motion and do not take place the rotation.
Y is when adjusting to focus adjustment mechanism, through inserting spanner 210 inside the truck, open the through-hole that corresponds on the truck, Y is opened interior hexagonal groove to the lead screw both ends, has interior hexagonal boss on the spanner, Y is to balancing weight and lead screw threaded connection, spanner and Y are to the lead screw cooperation back, and the spanner drives the lead screw clockwise or anticlockwise rotation, adjusts and controls about the balancing weight, and Y has the mating holes to the balancing weight on to, can guarantee balancing weight directional motion and do not take place the rotation.
When the Z-direction gravity center adjusting mechanism is adjusted, the two end parts of the gear shaft are provided with inner hexagonal grooves, and the wrench 210 is matched with the gear shaft to drive the gear shaft to rotate clockwise or anticlockwise, so that the structure is shown in fig. 19. The Z-direction balancing weight end is provided with end face teeth matched with the gear shaft, the balancing weight is provided with a guide hole matched with the guide rod, and the rotation of the gear shaft drives the Z-direction balancing weight to move up and down along the Z-direction guide rod, so that the purpose of adjusting the gravity center to move up and down is achieved.
Due to the design process of the dummy, other limbs except the trunk are provided with the unidirectional gravity center adjusting mechanisms, and the XYZ gravity center adjusting mechanism in the trunk plays a role in correcting the total gravity center of the body.
Damping supporting seats 211 are arranged at the two ends of the screw rod and the two ends of the gear shaft, so that the screw rod and the gear shaft are not rotated after being adjusted by a wrench and are fixed and adjusted in the gravity center position while the effects of fixing the screw rod and the gear shaft are achieved.
The child dummy provided by the invention supports tests of various child consumer goods (such as child scooters and child furniture), including child injury tests and consumer goods safety performance evaluation tests when the consumer goods fall and collide.
The operator twists each joint, thereby makes the dummy adjust the gesture, and the joint has certain damping, can make the gesture keep, and each joint has the nut of adjusting the damping size simultaneously, makes the regulation more convenient.
The embodiment can provide a dummy which accords with Chinese children physical signs (body size and weight distribution) for the test, highly simulates the physical sign characteristics of the children, can simulate different postures of the children, and enhances the feasibility and operability of the test.
The children dummy is used for replacing a real person to finish falling injury, collision and falling test, so that the danger possibly existing in the test of the real person is avoided, the data fed back by the sensor is more objective and accurate, and convenience is brought to later analysis.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. It will be apparent to those skilled in the art that various changes and modifications may be made in the invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A child dummy comprises a head (1), shoulder joints (2), a trunk (3), thighs (4), shanks (5), a big arm (6), a small arm (7), hip joints (8), knee joints (9) and simulation skins (10), wherein the head (1) is fixedly connected with the trunk (3), the trunk (3) is connected with the big arm (6) through the shoulder joints (2), the trunk (3) is connected with the thighs (4) through the hip joints (8), the thighs (4) are connected with the shanks (5) through the knee joints (9), the big arm (6) is connected with the small arm (7), the simulation skins (10) are laid on the head (1), the trunk (3), the thighs (4), the shanks (5), the big arm (6) and the small arm (7),
the method is characterized in that:
the simulated skin comprises an epidermal layer (101), a support layer (102) and a connecting layer (103);
the trunk (3) is internally provided with a first gravity center adjusting mechanism.
2. The child dummy of claim 1, wherein:
the epidermal layer of the simulated skin is a silica gel layer, and the supporting layer is a glass fiber reinforced plastic layer.
3. The child dummy of claim 1, wherein:
the shoulder joint (2) comprises: a first connecting plate (21), a friction plate (22), a second connecting plate (23), a first rotating shaft (24), and a second rotating shaft (25); the first connecting plate is connected with the inner framework of the trunk, and the second connecting plate is respectively connected with the left shoulder joint and the right shoulder joint, so that the shoulder joints rotate around the axes of the first rotating shaft and the second rotating shaft.
4. The child dummy of claim 1, wherein:
the hip joint comprises: the friction plate is arranged on the first connecting plate; the trunk and the thighs are connected through two connecting plates of the hip joint, so that the trunk and the thighs can rotate relatively.
5. The child dummy of claim 1, wherein:
the knee joint includes: the first connecting plate and the second connecting plate are respectively connected with thighs and shanks through bolts.
6. The child dummy of claim 4, wherein:
the first connecting plate and the second connecting plate of the hip joint are respectively connected with the knee joints of thighs and calves through bolts, and threaded holes are formed in the knee joints of the thighs and the calves to be matched with the knee joints of the thighs and the calves; the first connecting plate and the second connecting plate determine the distance between the first connecting plate and the second connecting plate through positioning rings, and the first connecting plate, the second connecting plate, the positioning rings and the damping friction plates are connected through nuts by a rotating shaft; and a damping friction plate is arranged between the first connecting plate and the nut.
7. The child dummy of claim 1, wherein:
one or the combination of the head, the thigh, the shank, the big arm and the small arm is provided with a second gravity center adjusting mechanism;
the second gravity center adjusting mechanism comprises a balancing weight (41), a threaded connecting rod (42) and a set screw (43); the end part of the threaded connecting rod (42) is provided with threads; the balancing weight (41) is provided with a through hole for the threaded connecting rod (42) to pass through and a positioning hole for the fastening screw (43) to be screwed in; the positioning hole is vertically communicated with the through hole; the inner wall of the positioning hole is provided with an internal thread matched with the external thread of the set screw (43); the threaded connecting rod (42) is arranged in the through hole in a penetrating mode, and the set screw (43) is used for locking the position of the balancing weight (41).
8. The child dummy of claim 1, wherein:
the first gravity center adjusting mechanism comprises a balancing weight, a threaded connecting rod and a set screw; the end part of the threaded connecting rod is provided with threads; the balancing weight is provided with a through hole for the threaded connecting rod to pass through and a positioning hole for the fastening screw to be screwed in; the positioning hole is vertically communicated with the through hole; the inner wall of the positioning hole is provided with an internal thread matched with the external thread of the set screw; the threaded connecting rod penetrates through the through hole, and the set screw is used for locking the position of the balancing weight.
9. The child dummy of claim 1, wherein:
the first center of gravity adjusting mechanism includes: a Z-direction gravity center adjusting mechanism, a Y-direction gravity center adjusting mechanism and an X-direction gravity center adjusting mechanism; the X direction, the Y direction and the Z direction are mutually vertical.
10. The child dummy of claim 9, wherein:
the Z-direction gravity center adjusting mechanism consists of a Z-direction guide rod, a gear shaft and a Z-direction balancing weight; one end of the Z-direction guide rod is provided with a thread and is connected with the trunk, and the two ends of the gear shaft are connected with the trunk; the end part of the Z-direction balancing weight is provided with teeth meshed with the gear shaft, and the inside of the Z-direction balancing weight is provided with a unthreaded hole for the Z-direction guide rod to pass through;
the X-direction gravity center adjusting mechanism consists of an X-direction balancing weight, an X-direction guide rod and an X-direction screw rod; a hole for the X guide rod to pass through and a threaded hole matched with the X-direction screw rod are formed in the X-direction balancing weight; the X-direction guide rod and the X-direction screw rod are respectively connected with the trunk;
the Y-direction gravity center adjusting mechanism consists of a Y-direction guide rod, a Y-direction screw rod and a Y-direction balancing weight; a hole for the Y guide rod to pass through and a threaded hole matched with the Y-direction screw rod are formed in the Y-direction balancing weight; the Y-direction guide rod and the Y-direction screw rod are respectively connected with the trunk.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011504389.5A CN112432795B (en) | 2020-12-17 | 2020-12-17 | Dummy for children |
| PCT/CN2021/083677 WO2022126912A1 (en) | 2020-12-17 | 2021-03-29 | Child dummy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011504389.5A CN112432795B (en) | 2020-12-17 | 2020-12-17 | Dummy for children |
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| Publication Number | Publication Date |
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| CN112432795A true CN112432795A (en) | 2021-03-02 |
| CN112432795B CN112432795B (en) | 2022-10-18 |
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| CN202011504389.5A Active CN112432795B (en) | 2020-12-17 | 2020-12-17 | Dummy for children |
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| Country | Link |
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| CN (1) | CN112432795B (en) |
| WO (1) | WO2022126912A1 (en) |
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| CN113639951A (en) * | 2021-07-22 | 2021-11-12 | 北京理工大学 | Dummy device with individualized and adjustable body segment and joint characteristics |
| WO2022126912A1 (en) * | 2020-12-17 | 2022-06-23 | 中国标准化研究院 | Child dummy |
| RU213419U1 (en) * | 2022-03-21 | 2022-09-12 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Поволжский государственный технологический университет" | Manikin for testing baby beds, cradles and cradles |
| CN115356124A (en) * | 2022-07-26 | 2022-11-18 | 长春汽车检测中心有限责任公司 | Automobile anti-collision performance testing device |
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| CN116620446B (en) * | 2023-07-26 | 2023-11-24 | 之江实验室 | Humanoid robot thigh, humanoid robot and manufacturing method |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112432795B (en) | 2022-10-18 |
| WO2022126912A1 (en) | 2022-06-23 |
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