JPS61262781A - Simulator for turn of head of delivered baby - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a childbirth head rotation simulator.

(b) Prior Art During delivery, the fetus is delivered from the mother's body while changing its posture (orientation) as follows. That is, as shown in FIG.
(a), but as the head descends down the birth canal, the fetus turns clockwise and faces down (b, c).
), emerges outside the mother's body from the back of the head (d), and when the head is completely expelled (e), the fetus turns in the opposite direction (to the left) again (turning its horizontal shoulders to vertical). ) delivered through the shoulder (f). In the case of the second position, the back of the fetus is on the right side of the mother's body and moves in the opposite direction during delivery compared to the case of the second position. Appropriate assistance is required at each stage of childbirth, and for the purpose of training, a device (simulator) that shows the movements of the fetus at each stage of childbirth is desired.

Conventionally, this type of device has been proposed in which a fetal model is placed inside a model that resembles the lower abdomen of a female body, and the instructor moves the fetal model with his/her hands to teach the childbirth process and assistance methods. has been done.

(c) Problems to be solved by the invention With such a device, the instructor must simultaneously explain the fetal movements during delivery and the assistance movements, so it is difficult to properly control the fetal movements. It was extremely difficult to demonstrate and required an assistant, which was inconvenient.

(d) Means and operation for solving the problem The present invention proposes a childbirth head rotation simulator that solves the above problems.

The device of the present invention includes a base having at least a pelvis model on its upper surface, a model of at least the head of a fetus during normal delivery, a rotating shaft having the head model attached to one end, and the rotating shaft being the rotating shaft. a carriage rotatable about its center and equipped with means for supporting via a spherical bearing at one point in its length direction; a means for rotationally driving the rotating shaft; a means for swinging the rotating shaft; The carriage is reciprocated in its length direction with respect to the base, and the head model is positioned within or near the pelvis model and a position where the head model emerges to the outside through a lower opening of the pelvis model. a drive guide means disposed within the rotating shaft in relation to the head model and tilting the head model between a chin-retracted position and a chin-extended position; and a driving means. By controlling each of the above-mentioned means according to predetermined correlations and anteroposterior relationships, it is possible to simulate the rotation of the fetal head during normal childbirth.

(e) Examples The illustrated embodiment will be described in detail below.

1 is a base, 2 is a pelvis model placed on one end of the upper surface of the base 1, 3 is a fetal head model, and 4 is a head model 3 which is rotated and tilted as described below from inside the pelvic cavity 2a. This is a drive guide mechanism that moves the device through an opening 2b provided at its lower part.

Reference numeral 5 denotes a guide frame fixed to the upper surface of the base 1, one end of which is adjacent to the pelvic cavity 2a, and has a pair of rails 7 on the upper surface that guide and support the carriage 6 so that it can move forward and backward in the longitudinal direction. 8 is a roller hanging from the bottom of the carriage 6, and each rail 7
transfer to the side edge of

9 is a motor for driving the carriage 6, 9a is a reduction gear, 10
is a nut (Fig. 3) screwed onto a screw rod 11 connected to the output shaft of the reducer 9a, which is fixed to the lower surface of the carriage 6, and moves the carriage 6 onto the guide rail 7 according to the rotation of the screw rod 11. advance and retreat along the line.

A support 12 is installed on the carriage 6 and is rotatable with respect to the carriage 6 about an axis 13. An upright frame 14 and a fork 15 are fixed to the upper surface of the support.

16 is a bearing member, and the outer spherical surface of the spherical part 16a is the upright frame 1
4 to form a spherical bearing, and one of the ends 16b has a flange 16c.
is fixed.

A rotating shaft 17 is rotatably inserted and supported by the bearing member 16, and inserted and held between a pair of fingers 15a of the fork 15 so as to be vertically movable and rotatable.

Reference numeral 18 is a motor attached to the rear end of the rotating shaft 17 and a transmission part 19.
The rotary shaft 17 is rotated through. A bearing sleeve 20 supports the rear end of the rotating shaft 17 and is fixed to the casing of the transmission section 19. Reference numeral 21 denotes a vertical operating rod whose upper fork portion 21a is pivotally connected to the bearing sleeve 20, and is connected to a through hole 12a (FIG. 4) provided in the support body 12 and an arcuate thrower 6a (first
(Fig.) and horizontal roller 22 at the lower end.
(FIGS. 3 and 4) and terminates in a vertical abutment roller 23. As will be described later, when the vertical operating rod 21 moves up and down, the bearing sleeve 20 moves up and down, thereby causing the rotating shaft 17 to tilt in a seesaw manner with respect to the upright frame 14 via the spherical bearing.

Reference numeral 24 denotes a guide groove provided in the length direction of the guide frame 5, which consists of two straight sections 24a and 24c and an intermediate diagonal section 24b (
(FIG. 3), the horizontal roller 22 of the vertical operating rod 21 is fitted into the guide groove 24 so as to be movable. Also, the bottom surface 2 of the guide groove
5 has irregularities as shown in cross section in FIG. 4, and the vertical abutting roller 23 at the lower end of the vertical operating rod 21 rolls into contact with the vertical abutting roller 23.

When the carriage 6 is moved forward (to the right) along the guide rail 7 from the retracted position shown in FIG. When moving from the straight portion 24a to the oblique portion 24b, the vertical actuating rod 21 can be displaced within the arcuate thrower 6a of the carriage 6, so that the support 12 through which the vertical actuating rod 21 is inserted is The carriage 6 is rotated slightly clockwise in FIG. 1 about the axis 13. When the support 12 rotates in this manner, the rotation shaft 17 supported by the upright frame 14 and engaged with the fork 15 also rotates the zero operating rod 21, which rotates clockwise around the axis 13 of the support 12. When the horizontal roller 22 moves from the oblique portion 24b of the guide groove 24 to the straight portion 24c, the support 1
2. Therefore, further rotation of the rotating shaft 17 is stopped.

When the horizontal roller 22 of the vertical operating rod 21 moves along the guide groove 24 as described above, the vertical abutting roller 23 at the lower end of the vertical operating rod 21 moves along the bottom surface 25 of the guide groove 24, and the roller 23 When the vertical actuating rod 21 comes into contact with the protrusion 25a of the bottom surface 25, it is lifted up against the tension spring 26, and then when it comes into contact with the recess 25b, it is lowered by the spring 26. The upper end of the vertical operating rod 21 is connected to the rotating shaft 17 (7) and the bearing sleeve 20, so when the vertical operating rod 21 is raised and lowered, the rotating shaft (1 in FIG.
17 (represented by chain lines) swings like a seesaw around the spherical bearings of the upright frame 14 (the centers of which are represented by O-1, O-2, and 0-3 in FIG. 4).

That is, in FIG. 4, the carriage 6 and the support 1
2 is at the initial (left end) position shown by the solid line, the vertical roller 23 is at the left end position P1 of the bottom surface 25 of the guide groove 24, and the rotating shaft 17 is at the horizontal position shown by the chain line 17-1.
When the carriage 6 is moved to the right and the vertical roller 23 comes to the position 22 and then P3 of the recess 25b on the groove bottom surface 25, the rotating shaft 17 moves to a point (spherical bearing) as shown by the chain line 17-2 and 17-3. At O-2 and 0-3, it tilts downward to the left and downward to the right.

Therefore, when the carriage 6 moves along the guide frame 5, the rotation shaft 17 rotates in the horizontal direction around the axis 13, and
The rotating shaft 17 performs a combined motion with seesaw-like rocking around the spherical bearing, and is also driven by the motor 18.
rotates around its own axis. This rotation of the rotating shaft 17 is supported by the bearing sleeve 20 and the bearing member 16.

The fetal head model 3 is provided at the tip of the rotating shaft 17 via a tilting mechanism 30 (a mechanism that tilts the fetal head model backwards to protrude the chin and conversely moves the chin so as to pull it back). That is, as best shown in FIGS. 5 and 6, a rotating cylinder 31 is fixed to the tip of the rotating shaft 17 so as to be rotatable at the same time. 32 is a support arm fixed to the tip of the rotary tube 31; 33 is a bracket rotatably connected to the tip of the support arm 32; the fetal head model 3 is fixed to this bracket.

34 is a motor housed in a rotating cylinder, 35 is its output shaft,
36 is the worm at the tip, 37 is the worm wheel,
38 is a rotating shaft to which a worm wheel 37 is fixed; 39
is a ladder wheel fixed to the rotating shaft 38, 40 is a ladder chain, and 41 is a ladder wheel fixed to a shaft 42, which is fixed to a bracket 33 and rotatably supported by the tip of the support arm 32. There is.

When the ladder chain 40 is run counterclockwise in FIG. 6 via the worm 36, worm wheel 37, and ladder wheel 39 by the rotation of the motor 34, the ladder chain 40 is moved counterclockwise in FIG. Therefore, the shaft 42 is rotated counterclockwise. As a result, the head model 3 tilts in the direction of the arrow Y so as to raise its head (to put out its chin) with respect to the support arm 32.

When the motor 34 is reversed, the ladder chain 40 runs clockwise in FIG. 6, tilting the head model 3 in the opposite direction (as if pulling the chin).

311, 312, and S13 are microswitches that control this tilting movement, and the opening and closing of Sll is controlled by an operating piece 38a fixed to the rotating shaft 38, and 512, 513 is controlled by an operating piece 38b fixed to the rotating shaft 38, respectively.

As shown in FIG. 2, on the side of the guide frame 5 are switches 54 to
SL, S2, and S3 shown in FIG. 1 are start switches provided on the top surface of the base l, respectively, and are actuated by a switch actuation arm 6b installed vertically on the carriage 6 to perform the control described below. It is a stop switch and a return switch. Further, reference numerals 514 and 315 indicate microswitches disposed on the flange 16C at intervals of 90', which are operated by the actuating protrusion 17a (FIG. 5) on the rotating shaft 17 to carry out the control described later.

In the above configuration, as shown in FIG. 1, when the start switch Sl (FIG. 1) is pressed while the fetal head model 3 is in the first position (sideways with its left side facing down), the motor 9 starts rotating. Then, the carriage 6 moves to the right in FIGS. 1 to 4. When the switch activation arm 6b activates the switch S5 by moving the carriage 6 to the right, the motor 1
8 is energized, the rotating shaft 17 rotates clockwise (in the direction indicated by the arrow X in FIG. 1) (forward rotation), and the head model 3 is rotated so that it faces downward (face downward).

Due to the rightward movement of the carriage 6, the vertical roller 23 of the vertical operating rod 21 is transferred from the position Pi of the guide groove 24 on the cam surface 25, and as it approaches the convex portion 25a, the rotating shaft 17 moves to the right around the spherical bearing. Since the head model 3 is tilted, it moves to the lower right within the pelvic cavity. When the horizontal roller 22 of the vertical operating rod 21 enters the diagonal intersection 24b of the guide groove 24 and moves forward, the support 12
rotates clockwise in FIG. 1 around the axis 13 on the carriage, the rotating shaft 17 also rotates clockwise, and the head model 3 moves to the center of the pelvic cavity. When the vertical roller 23 of the vertical operating rod 21 comes to the position P-2 of the recess 25b of the cam surface 25, the rotating shaft 17 tilts upward on the right side around the fulcrum 0-2 as shown by 17-2. Therefore, the head model 3 is moved slightly upward while facing downward.The back of the neck of the head model 3 is located below the pubic bone (Fig. 7(a)).
).

By this time, the rotating shaft 17 has rotated 90 degrees from the state shown in FIG. 1, and the operating piece 17a operates the switch 515 on the 7th flange 16C to deenergize the motor 18 and stop the rotating shaft 17, so the head model is 3 is held with the face facing downward.

By this time, the horizontal roller 22 of the vertical operating rod 21 has entered the straight portion 24c of the guide groove 24. When the switch operating piece 6b operates the switch S7, the motor 34 is energized and the ladder chain 40 runs counterclockwise in FIG.
in the direction of arrow Y). When the switch operating piece 38a (FIGS. 5 and 6) operates the switch Sll due to the movement of the head model, the motor 34 is deenergized and the movement of the head is stopped. During this time, the carriage 6 continues to move to the right, and the vertical roller 23 at the lower end of the vertical actuating rod 24 moves to the convex portion 25c on the cam surface.
Since the rotating shaft 17 is in rolling contact with the rotating shaft 17, the rotating shaft 17 is tilted so that the right end thereof is lowered. That is, the head model 3 moves diagonally downward to the right and moves out of the pelvis through the lower (right side in the figure) opening of the pelvic cavity, while lifting the back of the head and protruding the "chin" (Fig. 7 (b)
) ).

When the switch actuating arm 6a operates the switch S9, the motor 18 is reversed and the rotating shaft 17 is reversed, so that the head model 3 that has exited the pelvic cavity is rotated sideways from the downward direction again with the left side facing downward. , 80 degrees, the protrusion 17a on the rotating shaft 17 operates the switch 314 on the flange 16c to stop the motor 18. The motor 34 is reversely energized by the operation of the switch S9, the ladder chain 40 is rotated in the opposite direction (clockwise in FIG. 6), the head model 3 is moved in the direction of pulling the chin, and the switch 512 is actuated by the switch operating piece 38b. When this happens, the motor 34 is deenergized and the head model 3
is stopped with the chin pulled in halfway (halfway between the initial chin pulled position and the chin protruded position).

During this time, the carriage moves to the right and when the operating arm 6a operates the switch SIO, the motor 9 is deenergized and the carriage 6 stops.

With the above steps, the head model has simulated the movements shown in FIGS. 8a-f.

When the return switch S3 is pressed, the motor 9 is energized in the reverse direction, the carriage 6 is moved in the opposite direction (to the left in the figure), and the motor 18 is energized in the forward direction, causing the head model to rotate in a downward direction and move into the pelvic cavity. When the switch S8 is activated, the motor 34 is reversely energized and the head model is moved from the state where the jaw is pulled halfway to the original state where the jaw is further pulled, and the switch S8 is activated.
Activation of I3 deenergizes motor 34, then switch S
6 is activated, the motor 18 is energized to rotate in the normal direction, and the head model is moved from the face-down state to the initial horizontal state. The motor 18 is de-energized by the activation of switch S14, and switch S4 is activated.
When activated, the carriage 6 stops and the device returns to its original state. As is clear from the above description, when the carriage moves forward to the right, the switches S6 and S8 are not operated, and when the carriage moves backward to the left, the switches S5, S7, and S9 are not operated.

In the illustrated embodiment, the fetal head model is placed with its left side down (first order), but a configuration with its right side down (second order) is also possible. In this case, the guide groove 24 is symmetrical to the case shown. In other words, the oblique text portion 2aC is connected to the left end of the straight portion 24b in the upper left direction in FIG. 3, and the straight portion 24a is connected to the left end of the oblique portion 2aC. It is also possible to provide such two types of grooves in advance so that one can be selectively used, and the head model can also be selectively attached either to the left or to the right. In addition, the fetal model can include not only the head but also the entire body. Furthermore, a model of the entire female body may be used instead of a pelvis model.

(f) Effects As described above, the device of the present invention can automatically simulate the movement of the fetal head during childbirth, and is therefore extremely effective in teaching childbirth and its assistance in obstetrics.

[Brief explanation of drawings]

FIG. 1 is a plan view of the device of the present invention. Fig. 2 is a front view of the same, Fig. 3 is a plan view of Fig. 1 excluding the upper component, Fig. 4 is an explanatory diagram of operation, Fig. 5 is a partially enlarged plan view, Fig. 6 is Fig. 5 Figures 7(a) and (b) are diagrams showing different stages of tilting of the head model, and Figures 8(a), (b), (c), (d), (e) and (f) are normal childbirth. FIG. 3 is an explanatory diagram showing the movement of the fetus during l...Base, 2...Pelvis model 5, fist, guide frame, 6-War-carriage, 12--Support, No. 16 #red bearing member, 17... Rotating shaft, 24...・Guide groove, 30...Tilt mechanism. No. 78 Atsushi 3

Claims (1)

[Claims] (1) a) a base having at least a pelvic model on its upper surface; b) a model of at least the head of a fetus during normal delivery; c) a rotating shaft with the head model attached to one end; d) the above-mentioned a carriage equipped with means for supporting a rotary shaft rotatably about its axis via a spherical bearing at one point in its longitudinal direction; e) means for rotationally driving said rotary shaft; and f) said carriage. g) reciprocating the carriage with respect to the base in its length direction, and positioning the head model in or near the pelvis model and opening the lower part of the pelvis model; h) drive guide means for selectively determining the position through which the head model is exposed to the outside; h) disposed within the rotating shaft in relation to the head model;
a tilting drive means for tilting the head model between a position where the chin is pulled and a position where the chin is protruded; i) a rotation drive means for the rotary shaft, a swing means for the rotary shaft, and a drive for the carriage; A childbirth head rotation simulator comprising: a guide means; and a means for controlling the tilting drive means of the head model according to a predetermined correlation and anteroposterior relationship.