CN215068863U - Atrioventricular block demonstration model capable of adjusting second degree - Google Patents

Abstract

The utility model discloses a two-degree adjustable atrioventricular conduction block demonstration model in the technical field of heart beating models, which comprises a ventricular cavity cover, a closed cavity with a ventricular shape at the outer part, a plurality of ventricular elastic strips fixedly connected with the inner wall uniformly, and a ventricular limiting shaft fixed at the inner part, wherein a ventricular tension wheel is rotatably arranged on the ventricular limiting shaft, the rhythm of the heart beat can be simulated, and the contraction and relaxation of the heart chamber and the heart atrium can be displayed, the device can visually simulate and display the atrioventricular conduction block of the heart, and can simulate not only the atrioventricular conduction block of the I type, but also adjust the heart beating state of the atrioventricular conduction block of the II type for simulating and displaying, moreover, the device has a complete mechanical structure, does not need a power source, does not have cardiovascular simulation, only displays the heart beat rhythm, and is more convenient to carry, can be conveniently carried and displayed for people in different places, and is more convenient to use.

Description

Atrioventricular block demonstration model capable of adjusting second degree

Technical Field

The utility model relates to a heart beat model technical field especially relates to a can adjust two degrees atrioventricular conduction block demonstration model.

Background

The heart's primary function is to provide the motive force for blood flow to the various parts of the body. The human heart is located in the lower left part of the chest, and has a volume about equivalent to the size of a fist and a weight of about 250 g. The heart of a woman is generally smaller and lighter than the heart of a man.

The human heart is shaped like a peach, is positioned above the diaphragm and between the two lungs, is slightly left, is in the middle of the chest cavity, is slightly lower left, is conical, has the size approximately equal to that of a fist of the user, is internally provided with four cavities, and has an atrium at the upper part and a ventricle at the lower part. The relaxation and contraction of the atria and ventricles push the blood circulation through the body.

The heart contracts and relaxes once, called a cardiac cycle, which includes four processes of atrial contraction, atrial relaxation, ventricular contraction and ventricular relaxation, and normal heartbeats are of fixed frequency and sequence.

When the heart is in diastole, the internal pressure is reduced, the vena cava blood flows back into the heart, when the heart is in systole, the internal pressure is increased, the blood is pumped to the artery, and each contraction and diastole of the heart forms a cardiac cycle. The first in a cardiac cycle is a two-atrial contraction, in which the right atrium contracts slightly before the left atrium; the two ventricles contract after the atria begin to relax, while the contraction of the left ventricle is slightly earlier than that of the right ventricle, then the ventricles relax, and the atria begin to contract again at the late stage of the diastole of the ventricles; the heartbeat sequence is thus: atrial contraction, atrial relaxation, ventricular contraction, ventricular relaxation, which is the normal cardiac cycle of the heart beat.

Some people will have a retardation phenomenon when the heartbeat beats:

the second degree atrioventricular block is divided into type I (Venturi or Morse type I) and type II (Morse type II), the second degree I type atrioventricular block is the most common type of second degree atrioventricular block, and the conduction time from an atrium to a ventricle is gradually prolonged until activation of one atrium cannot be transmitted to the ventricle, so that the ventricle stops jumping once;

the second degree II type atrioventricular conduction block means that the excitation of the atria cannot be suddenly transmitted to the ventricles, the electrocardiogram shows that the QRS wave complex has intermittent leakage, namely, the atria and the ventricles are always in a normal beating rhythm, the excitation of the sudden atria cannot be transmitted to the ventricles, the ventricles stop suddenly, the leakage jumps once, and the rhythm is normal under the condition of other normal beats.

Based on this, the utility model designs a can adjust the retardant demonstration model of atrioventricular conduction of second degree to solve above-mentioned problem.

Disclosure of Invention

An object of the utility model is to provide a can adjust the retardant demonstration model of atrioventricular conduction of second degree, can simulate the rhythm of heartbeat, and demonstrate the contraction relaxation of the ventricle of heartbeat and atrium, this device can make audio-visual simulation show to the atrioventricular conduction of heart is retardant, and can not only simulate out the atrioventricular conduction of I type and block, can also adjust the heart state of beating that the atrioventricular conduction of II type is retardant and simulate the demonstration, and this device is complete mechanical structure, do not need the power supply, also do not have cardiovascular simulation, only show heartbeat rhythm, consequently, the preparation is simpler, it is more convenient to carry, can portable show people in different places, it is also more convenient to use.

The utility model discloses a realize like this: a second-degree adjustable atrioventricular block demonstration model comprising:

the outer part of the ventricular cavity cover is a closed cavity in the shape of a ventricle, the inner wall of the ventricular cavity cover is uniformly and fixedly connected with a plurality of ventricular elastic strips, a ventricular limiting shaft is fixed in the ventricular cavity cover, a ventricular tension wheel is rotatably arranged on the ventricular limiting shaft, and the other ends of the ventricular elastic strips are fixedly connected with the ventricular tension wheel;

the atrium chamber cover is a closed chamber body with an atrium shape, the inner wall of the atrium chamber cover is uniformly and fixedly connected with a plurality of atrium elastic strips, an atrium limiting shaft is further fixed in the atrium chamber cover, an atrium tension wheel is rotatably arranged on the atrium limiting shaft, and the other ends of the atrium elastic strips are fixedly connected with the atrium tension wheel;

the fixed shaft is a straight shaft, can be rotatably inserted between the ventricular chamber cover and the atrial chamber cover through a bearing, and is uniformly and annularly provided with n atrium rotating rods;

the adjusting rod is a loop bar, can be inserted into and pulled out of the loop bar and is slidably arranged on the fixed shaft in a sleeved mode, one end of the adjusting rod is arranged outside the ventricular cavity cover and the atrial cavity cover, the other end of the adjusting rod is telescopically and slidably arranged on the fixed shaft of the inner cavities of the ventricular cavity cover and the atrial cavity cover, n-1I-type ventricular rotating rods and n-1 II-type ventricular rotating rods are arranged on the adjusting rod, and each of the atrial rotating rods, the I-type ventricular rotating rods and the II-type ventricular rotating rods are arranged in the inner cavities of the ventricular cavity cover and the atrial cavity cover;

the n atrium rotating rods are uniformly and annularly arranged on the same cross section of the fixed shaft, and the n-1 atrium rotating rods are annularly arranged on the same cross section of the adjusting rod;

n-1 of the II type ventricle rotating rods are annularly arranged on the same cross section of the adjusting rod, and the cross sections of the atrium rotating rod, the I type ventricle rotating rod and the II type ventricle rotating rod are mutually parallel,

the adjusting rod and the fixed shaft synchronously rotate through the flat key;

each atrium rotating rod can be separated and mutually shifted with the atrium tension wheel, and each I-type ventricle rotating rod and each II-type ventricle rotating rod can be separated and mutually shifted with the ventricle tension wheel;

the included angles among the n-1I-shaped ventricular rotating rods are sequentially increased;

n-1 interval between II type ventricle dwang is even, and with n atrium dwang position one-to-one, and with the nth II type ventricle dwang position that the atrium dwang corresponds vacates

Further, n is 4;

the included angle interval between 4 atrium dwang is 90 degrees;

3 the included angle size between the I type ventricle dwang is: the included angle B is more than the included angle A and less than the included angle C;

the interval between 3 II type ventricle dwang all is 90, and even distribution is on 180 circumferences of adjusting the pole.

Further, all press from both sides in contained angle A and contained angle B cross section projection range between the I type ventricle dwang and be equipped with an atrium dwang, contained angle C cross section range between the I type ventricle dwang presss from both sides and is equipped with two atrium dwangs, the deviation angle of atrium dwang and I type ventricle dwang is fixed, the projection contained angle between I type ventricle dwang and the adjacent atrium dwang is no more than 90.

Furthermore, the deflection interval of the cross section projection of the II-type ventricle rotating rod and the cross section projection of the atrium rotating rod is 45 degrees, and two atrium rotating rods are arranged on the 180-degree circumferential cross section projection at one side where the II-type ventricle rotating rod is not distributed.

Furthermore, the plurality of ventricular elastic strips are tensioned and fixed on the inner wall of the ventricular cavity cover, and are tensioned between all jumping positions of the ventricles and the ventricular tension wheel;

the atrium elastic strips are tightly fixed on the inner wall of the atrium chamber cover, and the atrium elastic strips are tightly arranged between the full-beating position of the atrium and the atrium tension wheel.

Further, the ventricular elastic strip and the atrial elastic strip are strip-shaped spring strips.

Furthermore, the atrium contracting and expanding wheel is arranged on the atrium limiting shaft in a non-sliding mode through a bearing, and the ventricle contracting and expanding wheel is arranged on the ventricle limiting shaft in a non-sliding mode through a bearing.

Furthermore, the adjusting rod is in transition fit with the fixed shaft.

Furthermore, the ventricular chamber cover and the atrial chamber cover are integrally sealed cavities made of rubber, and stainless steel reinforcing ribs are arranged at the joint between the ventricular chamber cover and the atrial chamber cover.

Further, adjust the pole setting and still fixed turning handle in one of ventricle chamber cover and atrium chamber cover outside, turning handle is sheet structure, still be carved with the regulation mark on the outside regulation pole of ventricle chamber cover and atrium chamber cover, the mark of regulation mark corresponds with I type ventricle dwang and II type ventricle dwang with the position of the cross section of the place when the wheel cooperation is received to the ventricle respectively.

The utility model has the advantages that: 1. the invention does not use electronic products, has high reliability, convenient use and carrying and more applicable environments, and can adjust and display the heartbeat rhythm of different atrioventricular conduction blocks only by shaking hands;

2. the device ensures that the atrium rotating rod is respectively matched with the I-type ventricle rotating rod and the II-type ventricle rotating rod in different ways by pulling and pulling the adjusting rod, so that the adjustment of different beating rhythms of the ventricle cavity cover and the atrium cavity cover is realized, the heart beating rhythm in different states is simulated, and the purpose of displaying different beating rhythms of the heart rhythm blocked by atrioventricular conduction is realized;

3. the device has the advantages that the number and the angle of the atrium rotating rods for ventricular beat are fixed, and the number and the interval of the ventricle adjusting rods can be changed and adjusted, so that multiple beat frequency changes of ventricles can be simulated when the atrium beat frequency is fixed, only the rotating rod of the type I ventricle or the rotating rod of the type II ventricle needs to be adjusted for matching, the ventricular beat frequency change can be completed only by pulling the adjusting rods, and the operation is simple;

4. this device has used strip spring leaf as ventricle elastic strip and atrium elastic strip for ventricle receipts stretch out wheel and atrium receipts stretch out wheel after the atress shrink, because lose external force and elasticity is relaxed again and is opened, the simulation heartbeat is more lifelike, and need not operate once more, only need rotate the regulation pole and can accomplish easy operation.

Drawings

The invention will be further described with reference to the following examples with reference to the accompanying drawings.

FIG. 1 is a schematic view of the overall external structure of the present invention;

FIG. 2 is a schematic view of the overall internal structure of the present invention;

FIG. 3 is a schematic view of the structure of the adjusting lever of the present invention;

fig. 4 is a front schematic view of the atrial rotating rod of the present invention;

FIG. 5 is a front view of the I-shaped ventricular rotating rod of the present invention;

fig. 6 is a front schematic view of a type II ventricular rotating rod of the present invention;

FIG. 7 is a schematic view of the interior of the ventricular chamber cover and the atrial chamber cover of the present invention;

fig. 8 is a schematic front view of an I-shaped ventricular dwang of the present invention mated with an atrial dwang;

fig. 9 is a schematic front view of a type II ventricular dwang of the present invention mated with an atrial dwang;

fig. 10 is a front view of the atrial and ventricular deployment wheels of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1-ventricular chamber cover, 11-ventricular contraction wheel, 12-ventricular elastic strip, 13-ventricular limiting shaft, 14-deflector rod, 2-atrial chamber cover, 21-atrial contraction wheel, 22-atrial elastic strip, 23-atrial limiting shaft, 3-adjusting rod, 31-I type ventricular rotating rod, 32-II type ventricular rotating rod, 33-rotating handle, 34-adjusting mark, 4-fixing shaft and 41-atrial rotating rod.

Detailed Description

Referring to fig. 1 to 10, the present invention provides a technical solution: a model for demonstrating heart rhythm that modulates atrioventricular block, comprising:

the ventricular cavity cover 1 is provided with a closed cavity in the shape of a ventricle on the outside, a plurality of ventricular elastic strips 12 are uniformly and fixedly connected on the inner wall, a ventricular limiting shaft 13 is fixed in the ventricular cavity cover 1, a ventricular tension wheel 11 is rotatably arranged on the ventricular limiting shaft 13, and the other ends of the ventricular elastic strips 12 are fixedly connected with the ventricular tension wheel 11;

the atrium chamber cover 2, the outside is the closed cavity of the atrium shape, the homogeneous fixed connection of inner wall has a plurality of atrium elastic strips 22, the inside has fixed a atrium spacing axle 23, the ones that can rotate on the said atrium spacing axle 23 have installed an atrium and contracted the tension wheel 21, another end of a plurality of said atrium elastic strips 22 all fixedly connects with atrium and contracts the tension wheel 21;

the fixed shaft 4 is a straight shaft, can be rotatably inserted between the ventricular chamber cover 1 and the atrial chamber cover 2 through a bearing, and is uniformly and annularly provided with n atrial rotating rods 41;

the adjusting rod 3 is a loop bar, can be inserted and drawn out and is slidably arranged on the fixed shaft 4 in a sleeved mode, one end of the adjusting rod is arranged outside the ventricular cavity cover 1 and the atrial cavity cover 2, the other end of the adjusting rod is telescopically and slidably arranged on the fixed shaft 4 of the inner cavities of the ventricular cavity cover 1 and the atrial cavity cover 2, n-1I-shaped ventricular rotating rods 31 and n-1 II-shaped ventricular rotating rods 32 are arranged on the adjusting rod, and each of the atrial rotating rods 41, the I-shaped ventricular rotating rods 31 and the II-shaped ventricular rotating rods 32 is arranged in the inner cavities of the ventricular cavity cover 1 and the atrial cavity cover 2;

the n atrium rotating rods 41 are uniformly and annularly arranged on the same cross section of the fixed shaft 4, and the n-1 atrium rotating rods 31 are annularly arranged on the same cross section of the adjusting rod 3;

n-1 II type ventricle rotating rods 32 are annularly arranged on the same cross section of the adjusting rod 3, the cross sections of the atrium rotating rod 41, the I type ventricle rotating rod 31 and the II type ventricle rotating rod 32 which are annularly arranged are mutually parallel,

the adjusting rod 3 and the fixed shaft 4 synchronously rotate through a flat key;

each atrium rotating rod 41 can be separated and mutually pushed with the atrium tension wheel 21, and each I-type ventricle rotating rod 31 and each II-type ventricle rotating rod 32 can be separated and mutually pushed with the ventricle tension wheel 11;

the included angles among the n-1I-shaped ventricular rotating rods 31 are sequentially increased;

n-1 interval between II type ventricle dwang 32 is even, and with n atrium dwang 41 position one-to-one, and with the nth II type ventricle dwang 32 position that atrium dwang 41 corresponds vacates, and this device is complete mechanical structure moreover, does not need the power supply, does not have cardiovascular simulation yet, only demonstrates the heartbeat rhythm, consequently the preparation is simpler, and it is more convenient to carry, can portable give people's show in different places, and it is also more convenient to use.

Wherein n is 4;

the included angles between the 4 atrium rotating rods 41 are 90 degrees;

3 the included angle size between the I type ventricle dwang 31 is: the included angle B is more than the included angle A and less than the included angle C;

the 3 II-type ventricle rotating rods 32 are all 90 degrees in interval and are uniformly distributed on the 180-degree circumference of the adjusting rod 3, the structure is easier to manufacture, the types of atrioventricular conduction block are easier to distinguish obviously, the display effect is better, when n is 4, the 90-degree angle is easier to find the ventricular skip condition, the device is not limited to n being 4, n is any natural number greater than 2, and only 4 is optimal;

both the cross-sectional projection ranges of the included angle A and the included angle B between the I-shaped ventricular rotating rods 31 are provided with an atrium rotating rod 41, two atrium rotating rods 41 are clamped in the cross section range of an included angle C between the I-shaped ventricle rotating rods 31, the deviation angle of the atrium rotating rod 41 and the I-shaped ventricle rotating rod 31 is fixed, the projection included angle between the I-shaped ventricle rotating rod 31 and the adjacent atrium rotating rod 41 is not more than 90 degrees, under the condition that the same interval time for rotating the atrium rotating rod 41 is the same through different angle intervals of the n-1 type I ventricle rotating rods 31, the interval of the type I ventricle rotating rods 31 gradually becomes slower, finally, the rotating rod 31 of the I-shaped ventricle can stop toggling the ventricular contraction wheel 11 once, so that the ventricular cavity cover 1 stops contracting and expanding once, and the conduction block of the I-shaped atrioventricular cavity is clearly displayed;

the deflection interval of the cross section projection of the II-type ventricle rotating rod 32 and the cross section projection of the atrium rotating rod 41 is set at 45 degrees, and the 180-degree circumferential cross section projection at one side without the II-type ventricle rotating rod 32 is provided with two atrium rotating rods 41, so that both the ventricle and the atrium can beat regularly, for example, the ventricle can stop jumping once every three times of beating of the ventricle, when the ventricle beats, the atrium jumps 4 times, the ventricle can only jump 3 times, and the time interval has the same rule, so that the ventricular cavity cover 1 stops contracting and expanding once, and the II-type atrioventricular conduction block is clearly shown;

the ventricular elastic strips 12 are tensioned and fixed on the inner wall of the ventricular cavity cover 1, and the ventricular elastic strips 12 are tensioned between the full-beating position of the ventricle and the ventricular tension wheel 11;

the plurality of the atrial elastic strips 22 are tightly fixed on the inner wall of the atrial chamber cover 2, the plurality of the atrial elastic strips 22 are tightly tightened between the full-beating positions of the atrium and the atrial tension wheel 21, and the ventricular chamber cover 1 and the atrial chamber cover 2 are pulled through the elastic ventricular elastic strips 12 and the elastic strips 22 for simulating the beating of the heart;

the ventricular elastic strip 12 and the atrial elastic strip 22 are strip-shaped spring strips, so that the ventricular elastic strip and the atrial elastic strip are convenient to pull and elastically restore, and the contraction and immediate relaxation of the heart are simulated;

the atrium tension wheel 21 is arranged on the atrium limiting shaft 23 in a non-sliding way through a bearing, the ventricle tension wheel 11 is arranged on the ventricle limiting shaft 13 in a non-sliding way through a bearing, so that the atrium tension wheel 21 and the ventricle tension wheel 11 can rotationally pull the ventricle elastic strip 12 and the atrium elastic strip 22 to contract the ventricle cavity cover 1 and the atrium cavity cover 2;

the adjusting rod 3 is in transition fit with the fixed shaft 4, so that the adjusting rod 3 can be telescopically adjusted on the fixed shaft 4, and the adjusting rod 3 can also rotate by taking the fixed shaft 4 as an axis, so that the atrium rotating rod 41 and the atrium rotating rod 32 can be conveniently pulled during rotation;

the ventricular cavity cover 1 and the atrial cavity cover 2 are integrally sealed cavities made of rubber, and stainless steel reinforcing ribs are arranged at the joint between the ventricular cavity cover 1 and the atrial cavity cover 2 and used for stably fixing the adjusting rod 3 and the fixing shaft 4 and playing a role in reinforcing the integral structure;

adjust pole 3 and set up in one of ventricle chamber cover 1 and atrium chamber cover 2 outside and still fixed turning handle 33, turning handle 33 is sheet structure, it adjusts mark 34 still to be carved with on pole 3 to adjust pole 1 and atrium chamber cover 2 outside, the mark of adjusting mark 34 corresponds with I type ventricle dwang 31 and II type ventricle dwang 32 with the position of the place cross section position when the wheel 11 of opening is received to the ventricle respectively, be convenient for externally just can be accurate the judgement be I type ventricle dwang 31 or II type ventricle dwang 32 with the wheel 11 butt joint of opening is received to the ventricle, be convenient for clear adjust the different types of atrioventricular conduction block show.

In one embodiment of the invention:

the embodiment of the invention provides a heart rhythm demonstration model capable of adjusting a beating rhythm, and the technical problem solved by the invention is as follows: 1. the existing heartbeat model is not available and is basically a fixed model with a blood vessel flow direction; 2. the existing heart model is only fixed, cannot beat, cannot completely display the heartbeat and beat rhythm, and does not have a model convenient to display.

The realized technical effects are as follows: 1. the invention does not use electronic products, has high reliability, convenient use and carrying and more applicable environments, and can adjust and display different types of atrioventricular conduction block heartbeat rhythms only by shaking hands;

2. the device ensures that the atrium rotating rod 41 is respectively matched with the I-type ventricle rotating rod 31 and the II-type ventricle rotating rod 32 in different ways by pulling the adjusting rod 3, so as to adjust different beating rhythms of the ventricle cavity cover and the atrium cavity cover, be used for simulating the heart beating rhythms in different states and further achieve the purpose of displaying different beating rhythms of the heart beating;

3. the device has the advantages that the quantity and the angle of the atrium rotating rods 41 for atrial pulsation are fixed, and the quantity and the interval of the adjusting rods 3 for fixed ventricular transmission can be adjusted in a variable way, so that when the atrial pulsation frequency is fixed, the interval and the pulsation rhythm of the ventricles can be adjusted and changed, the matching can be realized only by adjusting the rotating rods 31 and 32 of the I type ventricle or the II type ventricle, and the operation can be finished only by pulling the adjusting rods 3;

4. the device uses the strip-shaped spring pieces as the ventricle elastic strips 12 and the atrium elastic strips 22, so that the ventricle tension wheel 11 and the atrium tension wheel 21 are elastically stretched after being stressed and contracted due to the loss of external force, the simulated heartbeat is more vivid, the operation is not required again, the operation can be finished only by rotating the adjusting rod 3, and the operation is simple.

In order to solve the above problems, the technical solution in the embodiments of the present invention has the following general idea:

for better understanding of the above technical solutions, the following detailed descriptions will be provided in conjunction with the drawings and the detailed description of the embodiments.

When the invention is manufactured and installed, firstly, two hollow rubber capsule bodies are made of rubber with moderate hardness and good toughness, the external shape is made into the shape of the heart of an adult, the internal part is hollow, one is made into the shape of a ventricle cover 1, the other is made into the shape of an atrium, and is an atrium cover 2, after all parts are assembled, the ventricle cover 1 and the atrium cover 2 are fused or bonded to form an integral sealed cavity, preferably, each part is arranged in the ventricle cover 1 and the atrium cover 2 in advance, and then the ventricle cover 1 and the atrium cover 2 are injected into an integral structure;

the heart in the ventricular cavity cover 1 can jump to contract or relax, the ventricular elastic strip 12 is fixed at the position, then, a ventricular limiting shaft 13 is fixedly inserted into the ventricular cavity cover 1, the ventricular limiting shaft 13 does not rotate, a ventricular tension wheel 11 is installed on the ventricular limiting shaft 13, the ventricular tension wheel 11 can be rotatably installed on the ventricular limiting shaft 13 through a bearing, but the ventricular tension wheel 11 cannot slide on the ventricular limiting shaft 13 and can only be fixed at a specific position and rotate along the axis of the ventricular limiting shaft 13, then, the ventricular elastic strip 12 is tightened between the inner wall of the ventricular cavity cover 1 and the ventricular tension wheel 11, so that the ventricular elastic strip 12 is in the ventricular relaxation state when not stressed, and the ventricular tension wheel 11 is in a hook-shaped structure as shown in fig. 4 and one end opposite to the adjusting rod 3;

the atrial chamber cover 2 has the same internal structure as the ventricular chamber cover 1, as shown in fig. 2, and the structures of the atrial tension wheel 21, the atrial elastic strip 22 and the atrial limiting shaft 23 are also the same as the internal structure of the ventricular chamber cover 1, so that the atrium is in a diastolic state when the atrial elastic strip 22 is free from external force, and the outside of the atrial chamber cover 2 is in a contracted state when the atrial elastic strip 22 is pulled by force;

then a fixed shaft 4 is inserted and fixed between the ventricular cavity cover 1 and the atrial cavity cover 2, one end of the fixed shaft 4 is tightly inserted and fixed in the ventricular cavity cover 1 and the atrial cavity cover 2 through a bearing, the other end of the fixed shaft is suspended, an adjusting rod 3 is inserted through the suspended end of the fixed shaft 4, the adjusting rod 3 is a loop bar, the adjusting rod 3 can slide along the axis of the fixed shaft 4, meanwhile, the adjusting rod 3 can also rotate along the fixed shaft 4, and the fixed shaft 4 can rotate on the ventricular cavity cover 1 and the atrial cavity cover 2 along a bearing and cannot be drawn out or retracted along the axis;

the adjusting rod 3 and the fixed shaft 4 are both made of stainless steel structures, the seam between the ventricular cavity cover 1 and the atrial cavity cover 2 is reinforced by stainless steel and fixed as a reinforcing rib, the seam between the ventricular cavity cover 1 and the atrial cavity cover 2 does not need to be shrunk or stretched in a relaxation mode, and then the fixed shaft 4 is installed on the reinforcing rib between the ventricular cavity cover 1 and the atrial cavity cover 2 through a bearing, so that the fixed shaft 4 can rotate along an axis, but cannot be drawn out or retracted and can only rotate but cannot move;

n atrium rotating rods 41 are arranged on the fixed shaft 4, 4 atrium rotating rods 41 are selected in the embodiment, n-1 is fixed on the adjusting rod 3, 3 ventricle rotating rods 31 of I type and 3 ventricle rotating rods 32 of II type are selected in the embodiment, the angle of the adjacent atrium rotating rods 41 is fixed, the angle between the same adjacent 3 ventricle rotating rods 31 of I type and 3 ventricle rotating rods 32 of II type is also fixed, the atrium rotating rod 41 and the atrium tension wheel 21 are always kept on the same plane which can be shifted mutually, as long as the atrium rotating rod 41 rotates the fixed shaft 4 along with the adjusting rod 3, the fixed shaft 4 can drive the atrium rotating rod 41 to rotate, therefore, the atrium tension wheel 21 is shifted, the rotating frequency and the shifting frequency are fixed, the atrium tension wheel 21 is uniformly shifted once by the n atrium rotating rods 41 every time the adjusting rod 3 rotates for one circle, and the adjusting rod 3 can be pulled and pulled on the fixed shaft 4; three I-shaped ventricle rotating rods 31 and three II-shaped ventricle rotating rods 32 are fixed on the adjusting rod 3, included angles among the three I-shaped ventricle rotating rods 31 are fixed, and the included angles are increased progressively, as shown in FIG. 5, the included angle C is greater than the included angle A and is greater than the included angle B, and the front sides of the three I-shaped ventricle rotating rods 31 and the atrium rotating rods 41 which are in superposition matching are schematically shown in FIG. 8;

the I-type ventricle rotating rod 31 or the II-type ventricle rotating rod 32 can be respectively adjusted and then respectively and alternately blocked with the ventricle tension wheel 11 for shifting;

one end of the adjusting rod 3 is inserted into the fixed shaft 4 and all the atrium rotating rod 41, the type-I ventricle rotating rod 31 and the type-II ventricle rotating rod 32 are positioned inside the ventricular chamber cover 1 and the atrium chamber cover 2, and are not separated, the other end of the adjusting rod 3 is positioned outside the ventricular chamber cover 1 and the atrial chamber cover 2 and is used for manually rotating and drawing the adjusting rod 3, a rotating handle 33 is also arranged at one end of the adjusting rod 3 outside the ventricular chamber cover 1 and the atrial chamber cover 2, adjusting marks 34 with different proportions are also cut on the outer end of the adjusting rod 3, and each adjustment marker 34 corresponds to the position of each set of atrial rotational rod 41 and type I ventricular rotational rod 31 and type II ventricular rotational rod 32, such as when type I ventricular rotational rod 31 and ventricular deployment wheel 11 are snapped into engagement with each other, while the first adjustment mark 34 is exactly aligned with the outer edges of the ventricular chamber cover 1 and the atrial chamber cover 2; similarly, when the type II ventricular rotation lever 32 and the ventricular deployment wheel 11 are snapped into engagement with each other, the second adjustment mark 34 is exactly aligned with the outer edges of the ventricular chamber cover 1 and the atrial chamber cover 2; and the positions need to be matched precisely.

When the invention is used, when the heart beat rhythm of atrioventricular conduction block needs to be displayed, the atrium rotating rod 41 is always butted and pulled with the atrium tension wheel 21, the adjusting rod 3 is firstly pulled, the adjusting rod 3 is pulled out on the fixed shaft 4, so that the plane of the I-shaped atrium rotating rod 31 is butted and pulled with the ventricle tension wheel 11, the matching angle of the atrium rotating rod 41 and the I-shaped atrium rotating rod 31 is shown in figure 8, when the I-shaped atrium rotating rod 31 and the ventricle tension wheel 11 are pulled mutually, the intermittent atrium rotating rod 41 is butted and pulled with the ventricle tension wheel 11, the ventricle tension wheel 11 and the atrium tension wheel 21 are pulled each time, the ventricle cavity cover 1 and the atrium cavity cover 2 are pulled and contracted by the ventricle elastic strip 12 or the atrium elastic strip 22, the heart beat rhythm displayed by the device is that the atrium contracts and relaxes for the first time, the ventricle contracts and relaxes for the first time, then the atrium contracts and relaxes for the second time, the heart chambers delay the contraction and relaxation for 2 times, then the atria contract and relaxation for 3 times, the heart chambers delay the contraction and relaxation for 3 times, the atria contract and relaxation for 4 times, the heart chambers stop the contraction and relaxation for 1 time, when the adjusting rod 3 and the fixing shaft 4 are continuously rotated, the beating of the heart chambers and the atria can start the cycle again, the time interval of the contraction and relaxation of the heart chambers at each time is the same, and the contraction and relaxation interval of the heart chambers and the atria at each time is gradually prolonged, so that the heart beating rhythm simulation display of the type I atrioventricular conduction block is achieved;

when the simulation display of the heart with the II type atrioventricular conduction block is needed, the adjusting rod 3 is pressed to enable the II type ventricle rotating rod 32 and the ventricle tension wheel 11 to be shifted mutually, the angle difference between the II type ventricle rotating rod 32 and the atrium rotating rod 41 is matched as shown in figure 9, the adjusting rod 3 is also rotated to drive the fixing shaft 4 to rotate, at the moment, the atrium rotating rod 41 shifts the atrium tension wheel 21, the same ventricle tension wheel 11 is shifted by the II type ventricle rotating rod 32, each time the ventricle tension wheel 11 and the atrium tension wheel 21 are shifted, the ventricle cavity cover 1 and the atrium cavity cover 2 can be pulled by the ventricle elastic strip 12 or the atrium elastic strip 22 to contract, and then the rhythm displayed by the device is that the atrium contracts and relaxes for the 1 st time, the ventricle contracts and relaxes for the 1 st time, then the atrium contracts and relaxes for the 2 nd time, the atrium contracts and relaxes for the 3 rd time, the heart chamber contracts and expands 3 times, the atrium contracts and expands 4 times, the heart chamber stops contracting and expanding 1 time, the circulation starts again, the contraction and expansion time interval of the heart chamber and the atrium is the same each time, the contraction and expansion time length of the atrium and the heart chamber is fixed each time, and therefore the heart beat rhythm simulation display of type II atrioventricular conduction block is achieved.

Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.

Claims (10)

1. A second-degree adjustable atrioventricular block demonstration model, comprising:

the heart ventricle cavity cover (1) is provided with a closed cavity in the shape of a heart ventricle on the outside, a plurality of heart ventricle elastic strips (12) are uniformly and fixedly connected on the inner wall, a heart ventricle limiting shaft (13) is further fixed in the heart ventricle cavity cover, a heart ventricle tension wheel (11) is rotatably arranged on the heart ventricle limiting shaft (13), and the other ends of the heart ventricle elastic strips (12) are fixedly connected with the heart ventricle tension wheel (11);

the atrium chamber cover (2) is a closed chamber body with an atrium shape on the outer part, a plurality of atrium elastic strips (22) are uniformly and fixedly connected on the inner wall, an atrium limiting shaft (23) is further fixed in the atrium chamber cover, an atrium tension wheel (21) is rotatably arranged on the atrium limiting shaft (23), and the other ends of the atrium elastic strips (22) are fixedly connected with the atrium tension wheel (21);

the fixed shaft (4) is a straight shaft, can be rotatably inserted between the ventricular cavity cover (1) and the atrial cavity cover (2) through a bearing, and is uniformly and annularly provided with n atrial rotating rods (41);

the adjusting rod (3) is a loop bar, can be inserted and drawn out and is arranged on the fixed shaft (4) in a sliding mode, one end of the adjusting rod is arranged outside the ventricular cavity cover (1) and the atrial cavity cover (2), the other end of the adjusting rod is arranged on the fixed shaft (4) of the inner cavities of the ventricular cavity cover (1) and the atrial cavity cover (2) in a sliding mode in a telescopic mode, n-1I-shaped ventricular rotating rods (31) and n-1 II-shaped ventricular rotating rods (32) are arranged on the adjusting rod, and each atrial rotating rod (41), each I-shaped ventricular rotating rod (31) and each II-shaped ventricular rotating rod (32) are arranged in the inner cavities of the ventricular cavity cover (1) and the atrial cavity cover (2);

the n atrium rotating rods (41) are uniformly and annularly arranged on the same cross section of the fixed shaft (4),

n-1 rotating rods (31) of the I-shaped heart chamber are annularly arranged on the same cross section of the adjusting rod (3);

n-1 II type ventricle rotating rods (32) are annularly arranged on the same cross section of the adjusting rod (3), and the cross sections of the atrium rotating rod (41), the I type ventricle rotating rod (31) and the II type ventricle rotating rod (32) which are annularly arranged are mutually parallel,

the adjusting rod (3) and the fixed shaft (4) synchronously rotate through a flat key;

each atrium rotating rod (41) can be separated and mutually shifted with the atrium tension wheel (21), and each I-type ventricle rotating rod (31) and each II-type ventricle rotating rod (32) can be separated and mutually shifted with the ventricle tension wheel (11);

the included angles among the n-1I-shaped ventricular rotating rods (31) are sequentially increased;

n-1 interval between II type ventricle dwang (32) is even, and with n atrium dwang (41) position one-to-one, and with the nth II type ventricle dwang (32) position that atrium dwang (41) corresponds vacates.

2. The demonstration model of atrioventricular block capable of modulating two degrees as claimed in claim 1, wherein: n is 4;

the included angle interval between 4 atrium dwang (41) is 90 degrees;

3 the included angle size between I type ventricle dwang (31) is: the included angle B is more than the included angle A and less than the included angle C;

the interval between 3 II type ventricle dwang (32) all is 90, and the even 180 circumference of distribution on adjusting pole (3).

3. The demonstration model of atrioventricular block capable of modulating two degrees as claimed in claim 2, wherein: all press from both sides in contained angle A between I type ventricle dwang (31) and contained angle B cross section projection range and be equipped with an atrium dwang (41), contained angle C cross section within range between I type ventricle dwang (31) presss from both sides and is equipped with two atrium dwang (41), the deviation angle of atrium dwang (41) and I type ventricle dwang (31) is fixed, the projection contained angle between I type ventricle dwang (31) and adjacent atrium dwang (41) is no more than 90.

4. A second-degree adjustable atrioventricular block demonstration model according to claim 3, wherein: the deflection interval of the cross section projection of the II type ventricle rotating rod (32) and the cross section projection of the atrium rotating rod (41) is 45 degrees, and two atrium rotating rods (41) are arranged on the 180-degree circumferential cross section projection at one side where the II type ventricle rotating rod (32) is not distributed.

5. The demonstration model of atrioventricular block capable of modulating two degrees as claimed in claim 1, wherein: the ventricular elastic strips (12) are tensioned and fixed on the inner wall of the ventricular cavity cover (1), and the ventricular elastic strips (12) are tensioned between the full beating position of the ventricle and the ventricular tension wheel (11);

the atrium elastic strips (22) are tightly fixed on the inner wall of the atrium chamber cover (2), and the atrium elastic strips (22) are tightly arranged between the full beating position of the atrium and the atrium tension wheel (21).

6. The demonstration model of atrioventricular block capable of modulating two degrees as claimed in claim 5, wherein: the ventricle elastic strip (12) and the atrium elastic strip (22) are strip-shaped spring strips.

7. The demonstration model of atrioventricular block capable of modulating two degrees as claimed in claim 1, wherein: the atrium tension wheel (21) is arranged on the atrium limit shaft (23) in a non-sliding mode through a bearing, and the ventricle tension wheel (11) is arranged on the ventricle limit shaft (13) in a non-sliding mode through a bearing.

8. The demonstration model of atrioventricular block capable of modulating two degrees as claimed in claim 1, wherein: the adjusting rod (3) is in transition fit with the fixed shaft (4).

9. The demonstration model of atrioventricular block capable of modulating two degrees as claimed in claim 1, wherein: the heart ventricle cover (1) and the heart atrium cover (2) are integrally sealed cavities made of rubber, and stainless steel reinforcing ribs are arranged at the joint between the heart ventricle cover (1) and the heart atrium cover (2).

10. The demonstration model of atrioventricular block capable of modulating two degrees as claimed in claim 1, wherein: adjust pole (3) and set up and still fixed turning handle (33) on one end of ventricular chamber cover (1) and atrium chamber cover (2) outside, turning handle (33) are sheet structure, still be carved with on regulation pole (3) of ventricular chamber cover (1) and atrium chamber cover (2) outside and adjust mark (34), the mark and I type ventricle dwang (31) and II type ventricle dwang (32) of adjusting mark (34) correspond with the position of the place section when ventricle is received and is opened wheel (11) cooperation respectively.

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