CN110807980A - Delivery mechanism model - Google Patents

Abstract

A delivery mechanism model, including a pelvis model and a fetal model, used in combination, the pelvic model, including left and right hip bones, sacrum and coccyx, and an entrance plane, a middle pelvic plane and an exit plane, each plane and the pelvis A plurality of light sources are respectively provided at the joints of the models, and the light sources are arranged along the direction of the pelvis meridian. A sliding rail is fixedly or detachably installed below the entrance plane, the sliding rail includes an outer ring (201) and an inner ring (202), the outer ring (201) does not rotate relative to the pelvis model, and the inner ring (201) does not rotate relative to the pelvis model. The ring (202) can be freely rotated relative to the outer ring (201), an engaging part (501) is provided at the widest part of the head and/or buttocks of the fetal model, and an elastic part (501) is provided in the engaging part (501). and the engaging portion (501) can be snapped into the inner ring (202) of the slide rail under compression, and rotate with the inner ring (202). The delivery mechanism model frees hands, facilitates detailed explanation, and improves the learning efficiency of trainees.

Description

A model of delivery mechanism

technical field

The invention relates to the field of medical teaching models, in particular to a childbirth mechanism model suitable for demonstration in families, hospitals and schools.

Background technique

Childbirth refers specifically to the period and process during which the fetus becomes an independent individual from the mother's body. When the fetus is delivered from the mother's pelvis, the size and shape of the fetus and the length of each meridian of the pelvis are directly related to whether the delivery can proceed smoothly. A full understanding of the pelvic structure and fetal delivery process will help reduce pregnant women's fear of childbirth, and help medical staff to master relevant techniques for prenatal examinations, midwifery, perineal sutures and other operations.

The current pelvic model can only be used in the teaching of pelvic physiology and anatomy in anatomy, obstetrics and gynecology, midwifery and other disciplines, and the usage is single and limited. Although some pelvic models also have meridians, they are usually fixed on the inner surface of the pelvis by iron wires or silk threads, which cannot be disassembled. The usage is relatively limited and cannot interact with the fetal model. For example, Chinese patent CN206148037U three-dimensional obstetric pelvic diameter teaching model discloses an elastic velvet fixed in the pelvis model to display the pelvic diameter, which is convenient for medical staff to understand the pelvic structure, but if it is necessary to display different fetal orientations, It is also necessary to prepare a fetal model and display it by hand, and the elastic velvet is fixed in the pelvis model, and the whole process of childbirth cannot be fully demonstrated when the fetal model is held for demonstration.

At present, if you want to understand the relationship between the size of the fontanelle, the sagittal suture and the pelvic meridian, you can only use the common pelvis model and the fetal model to make dictation, gestures or drawing on the blackboard, which increases the difficulty of understanding. The relationship between the sagittal suture and the pelvic meridian is also not very accurate. In addition, the long-term hand-held operation will make the operator easily fatigued and the teaching effect will be affected.

SUMMARY OF THE INVENTION

The present invention mainly solves the problems that the current pelvic model and the fetal model are not effectively combined, the explanation is laborious and laborious, and the accepting learners cannot accurately grasp the relevant knowledge. Demonstration on the model shows the relationship between the sagittal suture, large and small fontanelles and the pelvic meridian of the fetal head in different fetal orientations and during the delivery process. Moreover, the fetal model can be stuck in the slide rail of the pelvic model and rotate freely, freeing the operator's hands. It is easy to explain in detail and improve the learning efficiency of trainees.

The technical scheme of the present invention is as follows:

A childbirth mechanism model includes a pelvis model and a fetal model, which are used in combination. The fetal model can be passed through the pelvic model, and the fetal model can also be stuck near the meridian of the pelvic model to facilitate the display of different fetal models in the labor mechanism. The relationship between the sagittal sutures, fontanelles, and pelvic meridians in the orientation of the fetal head.

Further, the pelvis model is made by imitating the actual scale of the human body, preferably, it is made of PVC material, which is easy to operate.

Further, the fetal model is made according to the actual size of the fetus reduced by 20% to 30%, so as to facilitate the demonstration of the fetal model on the pelvis model.

The pelvic model as described above, the main body of the pelvis model includes left and right hip bones, sacrum and coccyx, and also includes an entrance plane, a middle pelvis plane and an exit plane, the entrance plane is close to the upper end position of the pelvis model, and the exit plane is A position close to the lower end of the pelvis model, the middle pelvis plane is located between the entrance plane and the exit plane, at least one of the entrance plane, the middle pelvis plane and the exit plane is connected with the pelvis model. The light source is arranged along the direction of the pelvis meridian; one or more track grooves are arranged between the entrance plane and the exit plane of the pelvis model, and a slide rail is fixedly or detachably installed in the track groove, and the lower surface of the track groove is The length from the lower surface of the next track slot or the bottommost surface of the pelvis model is greater than the width of the rail. Preferably, the slide rail includes an outer ring and an inner ring, the outer ring has no rotation relative to the pelvis model, and the inner ring can freely rotate relative to the outer ring.

Further, the direction of the light source where the entrance plane meets the pelvis model includes one or more of the anterior and posterior radial meridians, the transverse meridian, the left oblique meridian and the right oblique meridian at the entrance plane of the pelvis.

Preferably, the light sources at the entrance plane include a first anteroposterior diameter meridian light source, a first transverse meridian light source, a left oblique meridian light source and a right oblique meridian light source, wherein the first anteroposterior diameter meridian light source is located in the upper border of the symphysis pubis The first transverse meridian light source is located on the left or right side of the widest part of the iliopubic border, and the left oblique meridian light source and the right oblique meridian light source are located at the left and right sacroiliac joints.

In the above-mentioned pelvis model, the direction of the light source where the middle pelvis plane meets the pelvis model includes the anteroposterior diameter meridian and/or the transverse meridian at the middle pelvis plane.

Preferably, the light source at the mid-pelvic plane includes a second anteroposterior diameter meridian light source and a second transverse meridian light source, the second anteroposterior diameter meridian light source is located at the midpoint of the lower border of the pubic symphysis, and the second transverse meridian light source is located at Left or right ischial spine location.

In the pelvic model as described above, the light source at the exit plane includes a third anteroposterior diameter meridian light source and a third transverse meridian light source, the third anteroposterior diameter meridian light source is located at the sacrococcygeal joint position, and the third transverse meridian light source is located at the position of the sacrococcygeal joint. Location of the ischial tuberosity on the left or right side.

In the pelvis model described above, some or all of the light sources on the entrance plane, the light sources on the middle pelvis plane, and the light sources on the exit plane are partially or completely colored light sources. Preferably, different warp directions correspond to different color light sources.

As a further preference, the switch of the light source is located on the outer side of the pelvis model, which is convenient to start, and at the same time ensures that no debris inside the pelvis interferes with the demonstration of the fetal model on the pelvis model.

In the pelvic model as described above, at least the sacrum below the entrance plane is provided with one or more track grooves for placing the slide rails, preferably, one or more tracks may also be provided on the left and right hip bones The track groove cooperates with the track groove on the sacrum to support the sliding rail.

Further, the outer surface of the track groove is lower than the outer surface of the sacrum, and one or more elastic members are arranged in the track groove, and the elastic force of the elastic members can support the slide rail from falling. For example, the elastic member can be a ball spring pin, which can be easily rotated from the outside of the pelvis model body to the sacrum or the left and right hip bones, and the ball part is exposed to the outside of the track groove, which is convenient for clamping the slide rail.

Further, the slide rail includes a turntable bearing, the outer ring of which is clamped in the track groove, and the inner ring can freely rotate relative to the outer ring.

In the pelvis model as described above, the inner side of the slide rail is provided with an embedded groove, and the internal size of the embedded groove is not larger than the size of the surface opening. Preferably, the width of the opening of the embedded groove accounts for 1/3 to 2/3 of the thickness of the inner side of the slide rail.

A fetal model, used in conjunction with the above-mentioned pelvic model, includes a head, a body and four limbs. The size of the widest part of the fetal head and buttocks is matched with the inner diameter of the slide rail, and the fetal model can be stuck on the slide rail or rotated with the slide rail. Preferably, the fetus model is made of transparent material, and it is possible to check the situation of different parts of the fetus passing through the pelvic meridian during the delivery process.

Further, the fetal head is provided with a fontanelle and a sagittal suture, and through the demonstration of the positional relationship between the fetal head and the meridians in each plane of the pelvis model, it is convenient to visually understand the relationship between the meridians of each plane of the pelvis and the sagittal suture of the fetal head. , and how to use the size and fontanelle of the fetal head to determine the fetal orientation during vaginal examination. Preferably, the fontanelle and sagittal suture are marked with colored lines or blocks.

Further, the fetal head and/or the widest part of the buttocks are also provided with one or more engaging parts, and the engaging parts are provided with elastic parts, such as the engaging parts composed of springs and steel balls. The steel ball can rotate freely, and under the pressure of the spring, it can touch the widest part of the fetal head and/or buttocks, and a part of the steel ball is exposed. Rotation flexibility of the fetal model and prevent the fetal model from falling. Preferably, the size of the steel ball of the engaging portion matches the size of the embedded groove on the inner side of the slide rail.

Further, the engaging portion is also provided with a pressing portion toward the middle of the fetus, and the inside of the pressing portion is connected with the elastic member in the engaging portion, which can control the stroke of the elastic member, thereby controlling the engaging portion to expose the fetal head and/or hip distance. Preferably, the pressing portion and the engaging portion are arranged staggered by a certain angle.

The beneficial effects of the present invention are:

1. In the delivery mechanism model disclosed in the present invention, the pelvis model and the fetus model are connected by the inner slide rail of the pelvis model, so that the fetus model can be rotated flexibly, and it is convenient to demonstrate the relationship between different fetal positions and different fetal positions and the pelvis during the delivery process. Moreover, the fetal model can be stuck on the pelvis model, which frees the operator's hands, facilitates the explainer to use tools such as pens and teaching rods to explain in detail, and improves the learning efficiency of the trainee.

2. In the delivery mechanism model disclosed in the present invention, the fetus model and the pelvis model are connected by the engaging part, and by pressing the pressing part, the fetus model and the pelvis model can be easily separated, and it is convenient to observe the different meridians or lines of each plane of the pelvic model separately. Demonstrate the birthing process.

3. In the delivery mechanism model disclosed in the present invention, the pelvic model meridian position replaces iron wire, silk thread and other tangible materials with colored light sources, which is beneficial for the fetal model to pass through the pelvic model. In addition, one meridian or multiple meridians in one plane can be opened separately, combined with the fetal model, the relationship between the meridians of the pelvis model, the sagittal suture and the fontanelles of the fetal head can be clearly displayed.

Description of drawings

The aspects and advantages of the present application will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are for the purpose of illustrating preferred embodiments only and are not to be considered limiting of the invention.

In the attached image:

Fig. 1 is the structural representation of the pelvis model without slide rails of the present embodiment 1;

Fig. 2 is the sectional view of the fixed hole in the track groove;

Figure 3 is a schematic structural diagram of the pelvis model after the slide rail is installed;

Figure 4 is a schematic structural diagram of the pelvis model after the meridian light source is turned on;

Fig. 5 is the sectional view of the first slide rail;

Fig. 6 is the meridian position diagram at the entrance plane;

Figure 7 is a meridian position map at the plane of the middle pelvis;

Fig. 8 is the structural representation of fetal model;

Fig. 9 is the structural representation of fontanelle and sagittal suture of fetal head;

Figure 10 is a demonstration diagram of fetal delivery with head presentation;

Figure 11 is a demonstration of fetal delivery with breech presentation;

FIG. 12 is a schematic structural diagram of the pelvis model of Embodiment 3;

13 is a schematic structural diagram of the pelvis model of Embodiment 3 after the second slide rail is installed;

Fig. 14 is the position map of the anterior and posterior diameter meridians of the three planes of the sagittal plane of the pelvis model;

The components represented by each reference number in the figure are:

1. The main body of the pelvis model, 101, the first track groove, 102, the fixing hole, 103, the second track groove, 2, the first slide rail, 201, the outer ring, 202, the inner ring, 203, the embedded groove, 3, second slide rail, 4, ball spring pin, 5, fetal model body, 501, engaging part, 502, pressing part, 503, fontanelle, 504, sagittal suture, 6, first anteroposterior meridian, 601, first Front and back diameter meridian light source, 7, first horizontal meridian, 701, first horizontal meridian light source, 8, left oblique meridian, 801, left oblique meridian light source, 9, right oblique meridian, 901, right oblique meridian light source, 10, second Front and back diameter meridian, 1001, second front and rear diameter meridian light source, 11, second transverse meridian, 1101, second transverse meridian light source, 12, third transverse meridian, 1201, third transverse meridian light source, 13, third front and rear diameter meridian , 1301, the third front and rear diameter meridian light source.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. It should be noted that these embodiments are provided to enable a more thorough understanding of the present disclosure, and to fully convey the scope of the present disclosure to those skilled in the art. The present disclosure can be implemented in various forms, and should not be described herein. Implementation restrictions.

The orientations "front and rear", "left and right", "up and down", etc. mentioned in the present invention are only used to express relative positional relationships, and are not bound by any specific direction reference in practical applications.

Example 1

Referring first to FIGS. 10 and 11, FIGS. 10 and 11 are a delivery mechanism model of the embodiment, including a pelvis model and a fetal model, which can be used in combination to demonstrate different fetal orientations of fetal head or breech presentation. The fetal model can be passed through the pelvic model to simulate the delivery process, or it can be stuck near the pelvic model meridian, freeing hands and facilitating the explanation of the relationship between the pelvic meridian and various parts of the fetal head.

Further, the pelvis model is made by imitating the actual scale of the human body, preferably, it is made of PVC material, which is easy to operate. The fetus model is made according to the actual size of the fetus reduced by 20% to 30%, so as to facilitate the demonstration of the fetus model on the pelvis model and facilitate the fetus model to pass through the pelvis model.

1-3, the pelvis model includes a pelvis model main body 1 and a first sliding rail 2, the pelvic model main body 1 includes left and right hip bones, sacrum and coccyx, in addition, the inside of the pelvis model from top to bottom respectively There is an entrance plane, a middle pelvis plane and an exit plane, the entrance plane is close to the upper end of the pelvis model, the exit plane is close to the lower end of the pelvis model, the middle pelvis plane is located in the middle of the entrance plane and the exit plane, the entrance plane, The middle pelvis plane and the outlet plane are provided with a number of light sources at their junctions with the pelvis model, and the light sources are arranged along the pelvic meridian direction. The entrance plane, middle pelvis plane and exit plane here belong to the basic knowledge of obstetrics and gynecology, and there are clear position divisions in the pelvis, so they are not drawn in the accompanying drawings.

4 and 6, the light sources at the junction of the entrance plane and the pelvis model include a first front-back diameter meridian light source 601, a first transverse meridian light source 701, a left oblique meridian light source 801 and a right oblique meridian light source 901, wherein, The first anteroposterior diameter meridian light source 601 is located at the midpoint of the upper border of the pubic symphysis, and illuminates the opposite direction along the first anteroposterior diameter meridian line 6 at the entrance plane. The left and right oblique meridian light sources 801 and 901 are located at the left and right sacroiliac joints, respectively, along the left oblique meridian 8 and the right oblique meridian. 9 Directions are irradiated to the opposite side.

Of course, only one or more of the first anteroposterior diameter meridian light source 601 , the first transverse meridian light source 701 , the left oblique meridian light source 801 and the right oblique meridian light source 902 can be turned on as needed to observe the effect of each pelvic meridian on childbirth. impact of the process.

4 and 7, FIG. 7 is a meridian position diagram at the plane of the middle pelvis. The light sources at the junction of the plane of the middle pelvis and the pelvis model include a second anteroposterior diameter meridian light source 1001 and a second transverse meridian light source 1101, wherein , the second anteroposterior diameter meridian light source 1001 is located at the midpoint of the lower border of the pubic symphysis, and irradiates the opposite direction along the anteroposterior diameter meridian 10 at the exit plane, that is, it is emitted along the middle point of the lower border of the pubic symphysis, and passes through the midpoint of the line connecting the ischial spines. The second transverse meridian light source 1101 is located at the position of the left or right ischial spine, and irradiates toward the opposite direction along the second transverse meridian 11, that is, the line connecting the left and right ischial spines.

In this embodiment, the light sources at the exit plane include a third anteroposterior radial meridian light source 1301 and a third transverse meridian light source 1201, the third transverse meridian light source 1201 is located at the left or right ischial tuberosity, along the The direction of the third transverse meridian 12, that is, the direction of the connecting line between the left and right ischial tuberosities, is directed toward the opposite side, referring to FIG. Opposite irradiation, ie from the sacrococcygeal joint, towards the lower border of the pubic symphysis, see Figure 14. Through the third anteroposterior diameter meridian light source 1301 and the third transverse meridian light source 1201, the positional state of the fetal model when the pelvis model is drawn can be easily observed.

The positions of the first front and rear diameter meridians 6 , the second front and rear diameter meridians 10 , and the third front and rear diameter meridians 13 and their corresponding light sources can be specifically shown in FIG. 14 .

Preferably, some or all of the above-mentioned light sources on the entrance plane, the light sources on the middle pelvis plane, and the light sources on the exit plane are partially or fully colored light sources. Preferably, different warp directions correspond to different color light sources. For example, the first anteroposterior radial meridian light source 601 adopts a red light source, the first transverse meridian light source 701 adopts a green light source, and the left oblique meridian light source 801 and the right oblique meridian light source 901 use yellow light sources. The sagittal sutures of the fetal model head are associated with which meridians of the pelvic model during labor simulation.

Further, the switches of the above-mentioned light sources are located on the outer side of the pelvis model main body 1, which is convenient to start from the outside, and at the same time, it can ensure that no debris inside the pelvis interferes with the demonstration of the fetal model on the pelvis model. Preferably, each of the above-mentioned light source switches is powered by a battery, and the battery is fixed on the outer side of the pelvis model body 1, so that the pelvis model body 1 can be easily taken to any position for demonstration.

3 below, a detachable first slide rail 2 is installed below the entrance plane of the pelvis model. The first slide rail 2 includes an outer ring 201 and an inner ring 202. Referring to FIG. 5, the outer ring 201 is opposite to the pelvis The model does not rotate, and the inner ring 202 can freely rotate relative to the outer ring 201 .

Further, referring to FIG. 1 , a first track groove 101 is provided below the entrance plane for placing the first slide rail 2 , the first track groove 101 is located on the sacrum and the left and right hip bones, and there are three positions on the same plane.

2, the outer surface of the first track groove 101 is lower than the outer surface of the sacrum, so that the first slide rail 2 can be put into the first track groove 101 from top to bottom, and the first track groove 101 is provided with a plurality of elastic The elastic force of the elastic member can support the first slide rail 2 from falling, and the outer ring 201 thereof does not rotate. Preferably, the elastic member adopts a ball spring pin 4, which can be easily rotated from the outside of the pelvis model body 1 to the sacrum or the left and right hip bones, and the ball part is exposed to the outside of the first track groove 101, which is convenient for clamping the first track groove 101. Slide 2. When the first slide rail 2 is put into the first rail groove 101, press it down with a little force, and then it can be stuck in the first rail groove 101. When the first slide rail 2 is not in use, lift it up with a little force, and then take it out. , it is convenient for the pelvis model and each plane meridian to be displayed separately. Of course, the first slide rail 2 can also be fixedly installed in the first rail groove 101 for a single demonstration.

5 , the first slide rail 2 in this embodiment is preferably a turntable bearing, the outer ring 201 of which is clamped in the first track groove 101 , and the inner ring 202 can freely rotate relative to the outer ring 201 . During the delivery demonstration, the head or buttocks of the fetal model can be clamped on the inner ring 202, so that the fetal model can rotate freely, and it is convenient to observe the relationship between different fetal positions and the pelvic meridian.

Referring to Fig. 8 below, the fetal model is used in conjunction with the above-mentioned pelvis model, and the fetal model main body 5 includes a head, a body and four limbs, with both hands clasped together, the head is in a flexed state (the chin is close to the chest wall), and can be freely rotated, The legs are curled up to the buttocks to simulate the shape of the fetus in the abdomen. The dimensions of the fetal head and the widest part of the buttocks are matched with the dimensions of the inner ring 202 of the first slide rail 2, and the fetal model can be buckled on the inner ring 202. Press or hold the fetal model by hand to rotate along with the first slide rail 2 . Preferably, the fetal model is made of transparent material, which is convenient for checking the situation of different parts of the fetus passing through the pelvic meridian during the delivery process. As a further preference, the fetus model is made of elastic material, which can better simulate the situation that the fetus squeezes in the pelvis. Moreover, the fetal model itself is made according to the actual size of the fetus reduced by 20% to 30%, and the elastic fetal model can be easily squeezed through the first slide rail 2 .

Further, the head of the fetus is provided with a fontanelle 503 and a sagittal suture 504. Referring to FIG. 9, through the demonstration of the positional relationship between the fetal head and each meridian of the exit plane, it is convenient to visually understand the difference between the pelvic meridian and the sagittal suture 504 of the fetal head. and how to use the fontanelle 503 of the fetal head to determine the fetal orientation during vaginal examination. Preferably, the fontanelle 503 and the sagittal slit 504 are marked with colored lines or blocks to facilitate viewing.

Further, the head part and the widest part of the buttocks of the fetal model body 5 are provided with engaging parts 501, and the engaging parts 501 can be one or more. Preferably, the engaging parts 501 exist in pairs and are symmetrical The two ends of the widest part of the head of the fetal model body 5 and the two ends of the widest part of the buttocks are arranged to facilitate the balance of the fetal model. The engaging part 501 is provided with a spring and a steel ball (not shown in the figure), the steel ball can rotate freely, and can touch the widest part of the fetal head and buttocks under the pressure of the spring, and expose a part of the steel ball. outside. Preferably, the outer dimensions of the front and rear engaging portions 501 are slightly larger than the inner dimensions of the inner ring 202 of the first slide rail 2, and the engaging portions 501 can be snapped into the inner ring 202 of the first sliding rail 2 under compression. Referring to FIG. 5 , the steel balls of the engaging portion 501 can roll in the inner ring 202 to improve the rotational flexibility of the fetal model, and are pressed against the inner ring 202 under the action of the spring force to prevent the fetal model from falling.

Further, a pressing portion 502 is also provided below the engaging portion 501 located at the head position and above the engaging portion 501 located at the buttocks position (here “below” and “upper” refer to the upward direction relative to the head of the fetal model. In other words), the outer end face of the pressing part 502 does not exceed the size of the widest part of the fetal model, and the interior is connected with the inner spring of the engaging part 501, which can control the stroke of the spring, and then control the engaging part 501 to expose the head or buttocks of the fetus. distance to separate the fetal model from the pelvis model. By controlling the spring inside the engaging portion 501 by the pressing portion 502, the method of controlling the formation of the engaging portion 501 is applicable to a variety of toys or articles. Moreover, even if the pressing portion 502 is not used, it is possible to use more force to remove the fetal model from the fetus. The inner ring 202 is pulled out to separate the fetal model from the pelvis model, and the specific mechanisms of the engaging portion 501 and the pressing portion 502 will not be described in detail here.

Preferably, the pressing portion 502 and the engaging portion 501 are arranged staggered by a certain angle, and can be arranged 90 degrees apart as shown in FIG.

Example 2

The first slide rail 2 in Embodiment 1 needs to have a certain thickness so that the engaging portion 501 of the fetal model can be caught on the inner ring 202 . In this embodiment, an embedded groove 203 is added on the inner side of the first slide rail 2. Referring to FIG. 5, the size of the embedded groove 203 is matched with the size of the steel ball of the engaging portion 501, so that the fetal model can be well clamped Inside the inner ring 202, it will not fall. It is only necessary to reduce the size of the steel ball of the engaging portion 501 and the size of the embedded groove 203 of the first slide rail 2 synchronously, so that the thickness of the first slide rail 2 can be effectively reduced and the cost can be saved.

Further, the internal size of the embedded groove 203 is not larger than the opening size, preferably a rectangular groove, which is convenient for processing and manufacturing.

As a further preference, the opening width of the embedded groove 203 accounts for 2/3 of the inner thickness of the first slide rail 2 , which can ensure the stable connection between the steel ball of the engaging portion 501 and the embedded groove 203 of the first slide rail 2 on the basis of , to minimize the thickness of the first slide rail 2 .

As a variation of this embodiment, the first slide rail 2 may also have no inner ring 202, and an inner groove 203 is directly added to the inner side of the outer ring 201. The fetal model can also be rotated in the first sliding rail 2 very well.

Other features not mentioned in this embodiment may be the same as those in Embodiment 1, and will not be described again.

Example 3

12-14, in this embodiment, in addition to the first track groove 101 inside the pelvis model main body 1, there is also a second track groove 103 at the position of the middle pelvis plane, the second track groove 103 and the first track groove 103 A certain distance is reserved between the track grooves 101 . The second rail groove 103 can be used to place the second sliding rail 3, and the inner size of the second sliding rail 3 is matched with the size of the widest part of the fetal head and buttocks. Since the inner dimension of the pelvis plane in the pelvis model is smaller than the opening dimension of the upper inlet plane, the outer dimension of the second slide rail 3 needs to be slightly smaller than the first slide rail 2 . At the same time, the second slide rail 3 with a slightly smaller outer size can also be easily inserted into the second rail groove 103 from top to bottom. After reaching the approximate position of the middle pelvic plane, lower the end of the second sliding rail 3 close to the pubic bone downward, so that the second sliding rail 3 slides down into the second rail groove 103 .

Further, the structure of the second track groove 103 is similar to that of the first track groove 101, and there are also fixing holes 102 and ball spring pins 4 inside. The sacrum and the adjacent left and right hip bones are preferably located above the ischial spine, and the second orbital groove 103 formed by the three is on the same plane.

In this embodiment, there are a first rail groove 101 and a second rail groove 103, and the first slide rail 2 or the second slide rail 3 can be selected according to needs for different demonstrations. Referring to FIG. 13, when the second slide rail 3 is put into the second rail groove 103 for use, the head or buttocks of the fetal model can be clamped into the inner ring 202 of the second slide rail 3, and the fetal model can be rotated to observe the middle The positional relationship between the second anteroposterior radial meridian 10 and the second transverse meridian 11 in the pelvic plane and the sagittal suture of the fetal model head.

Of course, multiple orbital grooves other than the first orbital groove 101 and the second orbital groove 103 can also be set between the entrance plane and the exit plane of the pelvis model to observe different meridians in the pelvis model and the sagittal shape of the fetal head. seam position.

Other features not mentioned in this embodiment may be the same as those in Embodiment 1 or Embodiment 2, and will not be described again.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Additions, subtractions, and substitutions should all be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. a delivery mechanism model comprising a pelvis model and a fetal model, wherein the pelvis model comprises left and right hip bones, sacrum and coccyx, and the pelvis model is provided with an entrance plane, a middle pelvis plane and an exit plane , the entrance plane is close to the upper end of the pelvis model, the exit plane is close to the lower end of the pelvis model, the middle pelvis plane is located between the entrance plane and the exit plane, at least one of the entrance plane, the middle pelvis plane and the exit plane A number of light sources are arranged at the junction of the plane and the pelvis model, the light sources are arranged along the direction of the pelvis meridian, one or more track grooves are arranged between the entrance plane and the exit plane of the pelvis model, and a track groove is installed in the track groove. A fixed or detachable slide rail; the fetal model includes a head, a body and four limbs, the outer dimension of which is smaller than the internal size of the pelvis model, and the fetal model is detachably assembled on the slide rail of the pelvis model, And able to pass through the pelvis model. 2 . The delivery mechanism model according to claim 1 , wherein the distance between the lower surface of the track groove in the pelvis model and the lower surface of the next track groove or the bottommost surface of the pelvis model is greater than the width of the slide rail. 3 . 3 . The delivery mechanism model according to claim 1 , wherein the light source direction at the junction of the pelvic model entrance plane and the pelvis model includes anterior and posterior diameter meridians, transverse meridians, and left oblique meridians at the pelvic entrance plane. 4 . (8) and one or more of the right oblique meridian (9). 4 . The delivery mechanism model according to claim 1 , wherein the direction of the light source at the junction of the pelvis plane and the pelvis model in the pelvis model includes the anterior-posterior diameter meridian and/or the transverse meridian at the middle pelvic plane. 5 . 5 . The delivery mechanism model according to claim 1 , wherein the direction of the light source where the outlet plane of the pelvis model meets the pelvis model includes the transverse direction between the ischial tuberosities at the lowermost ends of the left and right hip bones. 6 . The meridian direction of the anteroposterior diameter at the meridian and/or sacrococcygeal. 6 . The delivery mechanism model according to claim 1 , wherein some or all of the light sources are colored light sources. 7 . 7 . The delivery mechanism model according to claim 1 , wherein at least one or more track grooves are provided on the sacrum below the entrance plane of the pelvis model for placing sliding rails. 7 . The surface is lower than the outer surface of the sacrum, and one or more elastic pieces are arranged in the track groove, and the elastic force of the elastic pieces can support the sliding rail not to fall. 8 . The delivery mechanism model according to claim 1 , wherein an inlay groove ( 203 ) is provided on the inner side of the slide rail, and the inner size of the inlay groove ( 203 ) is not larger than the surface opening size. 9 . 9 . A delivery mechanism model according to claim 1 , wherein the head of the fetal model is in a flexed state (the chin is close to the chest wall), and can rotate freely, and the legs are curled up to the buttocks. 10 . The size of the widest part of the fetal head and buttocks is matched with the inner diameter of the slide rail, and the fetal head is provided with a fontanelle (503) and a sagittal slit (504). 10. The delivery mechanism model according to claim 9, wherein one or more engaging parts (501) are further provided at the widest part of the fetal head and/or buttocks, and the engaging parts are (501) is provided with an elastic member, and the engaging portion (501) can be snapped into the slide rail under compression.

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