JPH0614967B2 - Assembly and manufacturing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an assembly which is composed of a plurality of assembly members such as a housing and a lid in a medical device such as an artificial lung and which can be assembled with each other. It relates to a manufacturing method.

[Prior Art] Conventionally, as this type of assembly, a hollow fiber type oxygenator having the following structure is known.

That is, it comprises a housing in which a gas chamber for replacing carbon dioxide gas in blood with oxygen through a hollow fiber is formed, and lids assembled at both ends of this housing. And a blood passage opening communicating with the hollow fiber in the lid.

By the way, conventionally, the housing and the lid are assembled by forming a male screw or a female screw at each of these connecting ends and screwing and tightening the screw. Also,
A potting agent such as a urethane adhesive was injected into the threaded portion to strengthen the assembly and prevent blood from leaking from the threaded portion.

[Problems to be Solved by the Invention] However, in the above-mentioned assembly, laborious work is required, such as assembly of assembly members by screws and injection of an adhesive into the threaded portion. It wasn't easy to automate.

Further, the mutual positional relationship between the gas opening of the housing and the blood passage port of the lid is such that the fluid flow inside the device is uniform,
Matching is required due to the design of the piping of the device or operation, but when assembling by screwing tightening, the relative positional relationship of the blood conduction port, etc. must be matched to a predetermined state around the axis. Was not easy.

The present invention has been made in view of such problems, and the assembling of the assembly member is performed without screwing and tightening the connecting portion and without using an adhesive. It is an object of the present invention to provide an assembly and a manufacturing method thereof that facilitates and ensures the relative positional relationship of each assembly member to be matched easily and reliably.

[Means for Solving the Problems] In order to solve the above-mentioned conventional problems, in the present invention,
A first assembly member having an assembly outer peripheral surface at one end, and a second assembly member having an assembly inner peripheral surface at one end, the first assembly member being a second assembly member, In the case of inserting and assembling at these one end portions, a first band-shaped engaging portion that is inclined at a predetermined angle with respect to a direction perpendicular to the axis line of the assembling direction is formed on the assembling outer peripheral surface of the first assembling member, A second strip-shaped engaging portion that can be engaged with the first strip-shaped engaging portion on the inner peripheral surface of the assembly of the second assembly member by inclining at a predetermined angle with respect to the direction perpendicular to the axis of the assembly direction. To form the first and second assembly members into the first and second assembly members.
At a predetermined relative rotational position around the axis of the assembling direction such that the strip-like engaging portions of the first and second strip-like engaging portions are both in the same inclination direction. An assembly is provided which is characterized in that the parts are hooked together.

In this structure, it is preferable that the first and second assembly members are provided with means for restricting the positional deviation of the both members in the rotation direction at the predetermined relative rotation position, and the first belt-shaped engaging portion. Are formed on the outer peripheral surface of the first assembly member in the half-circumferential region and the other half-circumferential region so that the inclination directions are opposite to each other, and the second strip-shaped engaging portion is formed in the second assembly member. On the circumferential surface, the half-circumferential region and the other half-circumferential region are formed so that the inclination directions are opposite to each other, and the first and second strip-shaped engaging portions both have the same inclination direction in each half-circumferential region. Is possible.

Further, the first assembly member is a tubular housing of an artificial lung having a first fluid communication port protrudingly provided on the outer peripheral surface,
The assembly member is a lid body having a second fluid passage port projecting from the outer peripheral surface, the first fluid passage port and the second fluid passage port are aligned at a predetermined relative rotational position. Then, the tubular housing and the lid can be engaged with each other along the axial direction.

Further, the present invention provides a first assembly member and a second assembly member by the gripping means.
Each assembly end of the assembly member is held in a state of facing each other, and both members are matched with a predetermined relative rotation position around the axis line, relatively moved along the axial direction of both members, and The present invention provides a method for manufacturing an assembly, which is characterized in that it is engaged with a hook.

The above-mentioned "hook engagement" means that one and the other are projections, or mutual engagement portions in the shape of a projection and a groove, and they are engaged with each other with elastic deformation. It means a configuration in which it cannot easily be disengaged when engaged.

[Operation] In the assembly of the present invention having the above-mentioned configuration, the first band-shaped engaging portion formed on the outer peripheral surface of the assembly of the first assembly member,
The second band-shaped engaging portion formed on the inner peripheral surface of the assembly of the second assembly member is perpendicular to the axis of the assembly direction,
Since they are inclined at a predetermined angle and can engage with each other by hooks, and both members are assembled via the elastic seal member, the relative pushing force along the axial direction makes it possible to
Both strip-shaped engaging portions are easily engaged, and both members are assembled in a fixed state and a liquid-tight state. Further, since the strip-shaped engaging portions can engage with each other only in the same inclination direction, the relative rotational position of each assembly member is determined to be a predetermined position, for example, the fluid passage port provided in each assembly member. The relative rotational position of the is automatically adjusted by the assembly of both members.

Further, in the method for manufacturing an assembled body according to the present invention, by the gripping means, the both assembled end portions of both assembled members are opposed to each other and at a predetermined relative rotational position, and subsequently moved in the axial direction, The two belt-shaped engaging portions are engaged with each other, whereby the assembly of the first assembly member and the second assembly member is completed, so that the assembly work can be easily automated.

Embodiments Embodiments of the present invention will be described below with reference to the drawings. First, FIGS. 1 and 2 show an assembly according to a first embodiment of the present invention. In the figure, reference numeral 1 is a first assembly member that constitutes a housing, and has a cylindrical assembly outer peripheral surface 2 at one end. The assembly outer peripheral surface 2 is formed with the same outer diameter between the assembly end surface 3 of the first assembly member 1 and the abutting edge 4 protruding like a flange. Reference numeral 5 is a first strip-shaped engaging portion formed by a ridge around the assembly outer peripheral surface 2 at a substantially center thereof, and is a vertical direction with respect to the axis of the assembly member 1 (XX shown in the drawing). In addition, as shown in the drawing, they are integrally provided in a manner inclined by a predetermined slight angle α with respect to the diametrical direction. As can be seen in the figure, the strip-shaped engaging portion 5 thus provided is a hook engaging portion that is erected along the inclined portion 5a facing the assembling end surface 3 and the outer peripheral surface 2 along the inclined surface at the angle α. 5b and has a saw-toothed ridge shape as a whole.

On the other hand, 7 is a second that constitutes the lid of the first assembly member 1.
Which has a cylindrical assembling inner peripheral surface 8 facing the assembling outer peripheral surface 2 and an annular assembling receiving portion 9 facing the assembling end surface 3. Reference numeral 10 is a second strip-shaped engaging portion formed by a groove around the inner peripheral surface of the assembly so as to engage with the first strip-shaped engaging portion 5 of the assembly member 2. Perpendicular to the axis or diametrically,
The corresponding inclined portion 10 is provided in a manner inclined by the same angle α as the inclination angle α of the engaging portion 5 and corresponds to the inclined portion 5a.
a and a corresponding hook engaging portion 10b elastically corresponding to the hook engaging portion 5b.

The tip portion 11 of the second belt-shaped engaging portion 10 has a large inner diameter toward the open end of the inner peripheral surface 8 of the assembly, and the inner peripheral surface of the assembly between the hook engaging portion 5b and the abutting edge 4. It is formed so as to face the surface 8. On the other hand, the rear end portion 12 of the second strip-shaped engaging portion 10 is formed to have the same inner diameter on the side of the assembly end surface 3 of the inclined portion 5a and to face the assembly inner peripheral surface 8. Reference numeral 13 is an elastic seal member formed of, for example, an O-ring made of silicone rubber. The elastic seal member 13 is held in the packing receiving groove portion 14 provided in the assembly receiving portion 9 and is in close contact with the assembly end surface 3 on the first assembly member 1 side.

The butt end edge 4 of the first assembly member 1 is provided with a pair of locking projections 15 and 1 projecting in the axial direction at symmetrical positions with respect to the axial line.
5 are formed (in the drawing, they are located on the front side and the back side of the paper). On the other hand, at the open end of the second assembly member 2, corresponding recesses 16 and 1 for engaging the engagement projection 15 at a predetermined relative rotational position of both assembly members 1 and 7.
6 is formed.

Further, 6 and 6 are schematic views of a gripping device of an automatic assembling machine that grips the assembly members 1 and 2 at the reference portions, respectively.

According to the assembly having the above configuration, the first assembly member 1 and the second assembly member 1
In order to assemble the assembly member 7 of No. 1, first, each assembly member 1, 7 is gripped by the gripping devices 6, 6 of the automatic assembly machine so that the assembly ends face each other and are on the coaxial line.
The belt-shaped engaging portions 5 and 10 are matched with each other at a predetermined relative rotational position around the axis so that the inclination directions of the belt-shaped engaging portions 5 and 10 can match with each other and engage with each other. Next, the assembly member 1 is relatively inserted and pushed into the assembly member 7 in the axial direction. As a result, the inner peripheral surface 8 of the assembly
As the tip portion 11 of the belt-shaped engaging portion 5 slides relative to the inclined portion 5a of the belt-shaped engaging portion 5, the belt-shaped engaging portions 5 and 10 elastically deform each other. As a result, the tip portion 11 can cross over the hook collecting portion 5b, and in this crossed state,
Part of the elastic deformation remains without being released, and the corresponding hook engaging portion 10b of the belt-shaped engaging portion 10 is pressed against the hook engaging portion 5b of the belt-shaped engaging portion 5 as shown in FIG. Can be combined. On the other hand, due to this engagement, movement in the disengagement direction is restrained, so that the assembling end face 3 is in a state of pressing the packing 13 and holds both members 1 and 7 in a liquid-tight manner, and at the same time, the engaging portions 10b and 5b are held. Secure engagement. Therefore,
With one push of mating force, one-touch type assembly is possible,
The assembling work, and thus the automation thereof, is extremely easy. Further, since both engaging portions 5 and 10 can be engaged only at a predetermined relative rotation position, the assembly members 1 and 7 are
In the case where the fluid communication port and the like are provided, the communication port and the like can be automatically arranged and aligned at a predetermined required position.

Further, by engaging the locking convex portion 15 with the corresponding concave portion 16, the positional displacement around the axis line due to the rattling of the engaging portions, which may occur when the manufacturing accuracy of the belt-like engaging portion is not high, is effectively made. Can be prevented.

Next, an assembly according to a second embodiment of the present invention will be described with reference to FIGS. 3 and 4.

In the figure, 5c and 5d are semi-circular belt-shaped engaging portions respectively located in the semi-circumferential area and the other semi-circular area on the outer peripheral surface 2 of the assembly, and both engaging portions 5c and 5d are first belt-shaped engaging portions. Make up 5. As shown in FIG. 4, in this belt-shaped engaging portion 5, one half-circumferential belt-shaped engaging portion 5c is inclined to one side by an angle α, while the other half-circumferential belt-shaped engaging portion 5d is the same. Is inclined to the opposite side at an angle α, that is, the engaging portion 5
Is formed in a two-thread male screw shape so as to cross the axis.

Reference numerals 10c and 10d denote half-circumferential belt-shaped engaging members that are inclined in the opposite sides at the inclination angle α of the engaging portions 5c and 5d in the respective half-circumferential regions corresponding to the above-mentioned half-circumferential belt-shaped engaging portions 5C and 5d, and that can engage with the half-circumferential belt-shaped engaging portions. The second belt-shaped engaging portion 10 is composed of the engaging portions 10c and 10d. Further, the both half-circumferential band-shaped engaging portions 10c and 10d are formed on the inner peripheral surface 8 of the assembly in a two-thread female screw shape substantially continuously up to the opening end.

According to the configuration of the assembly of the above-described embodiment, the second strip-shaped engaging portion 10 is formed into the double thread female thread up to the opening end of the inner peripheral surface 8 for assembly, so that the second assembly is formed by integral molding. This is effective when manufacturing the member 7. That is, of the molds for molding,
If a male thread having a two-thread male thread similar to the semi-peripheral belt-shaped engaging portions 5c, 5d is used, the molded product can be easily released from the male die, and as a result, the desired semi-peripheral belt-shaped engaging portions 10c, 10d can be obtained. Is obtained.

Since other configurations are similar to those of the assembly of the first embodiment, the components corresponding to those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

Furthermore, a third embodiment in which the assembly of the present invention is embodied in an oxygenator having a heat exchanger will be described with reference to FIGS. 5 and 6.

In this oxygenator, the blood inflow port cover 18, the heat exchanger 19, the oxygenator 20, and the blood outflow port cover 21 are coaxially arranged from the blood inflow side to the blood outflow side (from bottom to top in the figure). It is constructed by connecting sequences. At the inflow end of the blood inflow port cover 18, a blood communication port 18a is provided so as to be inclined with respect to the axis. 22
Is a housing of the heat exchanger 19, in which a plurality of blood pipes 23 are arranged and housed, and at both ends,
Heat medium conducting ports 22a, 22a are respectively provided so as to project in the same direction perpendicular to the axis. Reference numeral 24 is a housing of the artificial lung 20, in which the hollow fiber bundle 25 is housed,
At both ends, in the same direction as the axis perpendicular to the gas passage ports 24a, 2
4a are provided respectively. Further, at the outflow end of the blood outflow port cover 21, a blood conduction port 21a is provided so as to be inclined with respect to the axis on the side opposite to the conduction port 18a.

The assembly structure of the blood inflow port cover 18, the heat exchanger housing 22, the artificial lung housing 24, and the blood outflow port cover 21 is the same as that described in the first embodiment. That is, the assembling of the port cover 18 and the housing 22 of the heat exchanger is such that the assembling inner peripheral surface 8 is provided on the port cover 18 side and the housing 20 is provided with the assembling outer peripheral surface 2 corresponding to the inner peripheral surface 8. Assembling of the housing 22 of the heat exchanger and the housing 24 of the oxygenator is performed by mounting the inner peripheral surface 8 on the housing 22 and the outer peripheral surface 2 on the housing 24 corresponding to the inner peripheral surface 8. The assembly of the housing 24 and the blood outflow port cover 21 is such that the assembly outer peripheral surface 2 is formed on the housing 24 and the assembly inner peripheral surface 8 corresponding to the outer peripheral surface 2 is formed on the port cover 21, respectively. by.

The other components are the same as those of the assembly of the first embodiment, and the details are omitted.

According to the above configuration, the first strip-shaped engaging portion 5 and the second strip-shaped engaging portion 10 provided on the assembled outer peripheral surface 2 and the inner peripheral surface 8 engage with each other only at a predetermined relative rotation position. Therefore, as shown in FIG.
a, heat medium conducting ports 22a, 22a, gas conducting port 24a,
24a and the blood passage port 21a are positioned on the same line and aligned.

Although the present invention has been described above with reference to the examples, the present invention is not limited to the above examples, and various modifications can be made without departing from the scope of the present invention. For example, in the above-described first embodiment, the strip-shaped engaging portions 5 and 10 are formed in one line, but they may be multiple lines. In addition, in the second embodiment, the strip-shaped engaging portions 5 and 10 are formed in a double thread shape. The present invention is not limited to this, and for example, it may be formed in a continuous single thread shape or in a multi-threaded shape of three or more threads.

Furthermore, in each embodiment, the first strip-shaped engaging portion 5 is a ridge,
The second strip-shaped engaging portions 10 are each formed in a groove shape, but the present invention is not limited to this, and even if the ridges and the groove shapes are formed in reverse, or between the ridges, It suffices if they can be hook-engaged with each other. Further, the belt-shaped engaging portions 5, 10 are composed of the inclined portions 5a, 10a and the hook engaging portions 5b, 10b, but this configuration is not limited to the respective embodiments, and the hook engaging portions are mutually engaged. Anything can be used as long as it is configured to be able to do so.

[Effects of the Invention] As described above, according to the assembly and the method for manufacturing the same of the present invention, since the assembly of the members forming the assembly does not depend on the screw means, there is no work for tightening the screw, and the axis line is not required. The assembly members can be assembled to each other with a pushing force along the direction, which makes the assembly work extremely easy and
Assembly automation can be easily performed.

Furthermore, since the strip-shaped engaging portions of both assembly members are inclined, both assembly members are engaged only at a predetermined relative rotation position,
Therefore, the positions of the fluid communication ports and the like provided in both assembly members are automatically adjusted by the assembly of the assembly members.
There is also an effect that it is not necessary to pay special attention to the alignment.

FIG. 1 is a front view of a fragmentary broken-away view showing the assembly of the first embodiment of the present invention in a gripping device of an automatic assembly machine in a state where it is gripped in a separated state before assembly, and FIG. 2 is shown in FIG. FIG. 3 is a partially broken front view showing the assembly in an assembled state, FIG. 3 is a fragmentary front view showing the assembly of the second embodiment of the present invention in a separated state before assembly, and FIG. FIG. 5 is a left side view of the first assembly member of the assembly shown in FIG. 5, and FIG. 5 is a fragmentary front view of the third embodiment in which the assembly of the present invention is embodied in an artificial lung device equipped with a heat exchanger. 6 is a right side view of FIG.

DESCRIPTION OF SYMBOLS 1 ... 1st assembly member 2 ... Assembly outer peripheral surface 5 ... 1st strip | belt-shaped engaging part 7 ... 2nd assembly member 8 ... Assembly | attachment inner peripheral surface 10 ... 2nd strip-shaped engaging part 13 ... Elastic sealing member Some of the important advantages of the battery 116 over the nickel-cadmium battery normally used for ventricular assist devices are high energy density of about 2.5 times); weight reduction from 200 g to 80-100 m; low internal resulting in low power dissipation. Impedance;
High voltage per cell; about 4-fold increase in energy retention (40% monthly at body temperature versus 10% monthly), which significantly enhances system efficiency; and reliable residual capacity status indicator (cell voltage), to which In contrast, ni-nickel cadmium batteries have no indicator. Lack of Indicator Unexpected and unexpected equipment outages can occur, putting the patient at risk. Using the cell voltage as a residual capacity indicator, the depth of the cell discharge is precisely controlled by varying the cell voltage within two planned limits, which also allows thousands of charge / discharges to be achieved. It continuously monitors the battery voltage from the control system 28 and automatically activates the charging circuit (not shown) of the rechargeable power supply 32 when it reaches a preset low voltage, and when the battery voltage reaches a preset upper limit. This is achieved by automatically deactivating the charging circuit.

Tightly coupled magnetic circuits (not shown), including movable magnets in the coil of wire to extend the life of the implantable power supply 32, can be integrated into the drive arms 122 and 124. This magnetic circuit connects the pressure plate pump assembly 118 to the ventricle 12
It expands some of the mechanical work done when it expands during its filling period into electrical energy. Accordingly, electrical energy is provided to the implantable rechargeable battery 166. In addition, the power lost due to the truncation of cardioversion / defibrillation pulses required for effective ventricular tachyarrhythmia conversion is transferred to the SCR in the output circuit of the cardioversion / defibrillator device 38. Power MO instead
The SFET can be used to return to the rechargeable battery 166.

The high efficiency battery 166 combines the high efficiency of the ventricular assist device 10 to operate the implanter at normal blood flow for a period of time before requiring recharging of the internal power source 32.

Furthermore, since the batteries 166 do not outgas, they can be sealed within the titanium case 114 of the electronic module for long-term reliability.

Thus, the patient's plague or restraint-release time is significantly increased and the quality of life is correspondingly enhanced.

Referring again to FIG. 1, the functions of transcutaneous power supply 46 and programmer / interrogator 48, 50 will now be further described.
External transdermal power supply 46 includes approximately 15 power cells (not shown), such as batteries 166, in a "C" configuration connected in series. About 2
The external power supply 46, which weighs a pound and is worn by the patient in a belt or vest (not shown), has an internal power supply 3
2 is kept fully charged, during which time it supplies power to the internal subsystem 14 for at least 10 hours without recharging. Under normal conditions, the transcutaneous power supply 46 can operate the internal subsystem 14 until the day before recharging or changing to a new power belt or vest.

Transcutaneous energy transfer from the external power supply 46 to the internal power supply 32 is accomplished by two inductively coupled coaxial coils, one of which is the main coil (not shown) in the internal power supply and the other is the pickup coil 116. The second coil of the latter can be sealed within the electronic module case 114 (as outlined in Figures 3a and 3b) or protected by a butyl rubber coating, which is then in a polyether-based elastomeric urethane. And can be transplanted separately. Energy transfer to the second coil 116 can typically occur at 150 kHz.

Due to the large surface area for transcutaneous power transfer, the resulting electromagnetic radiation to the patient's tissue is low and in the range of the earth's magnetic field.

Telemeter link 66 enables non-invasive programming and interrogation of internal subsystem 14, and communication from programmer 48 to internal device 68 in control system 28 is performed using digital radio frequency (RF) technology.
Communication from the internal device 68 to the programmer 48 can be over an RF channel or an audio channel, the latter using piezoelectric speakers (not shown). Communication over any channel can be digital for data transmission or analog, eg, for real-time or recorded electrocardiographic transmission.

A manual pumping mechanism 44 can be used to maintain blood flow in the event of battery drain or failure of the auxiliary systems 14,16. Mechanism 44 as shown in FIGS. 2a and 2b
In addition to the push button 108, the cylindrical housing 70
And an annular flange 72 for maintaining the position of the housing. The annular flange 72 is the paired bellows 18.
0 (Fig. 4d) and 184 (4a, 4b and 4c)
A flexible plastic tube 74 similar to the elastic tube 182 (FIG. 2b) of the fluid coupling between (FIG. 2) and FIG. The push button 108 can be biased outward by, for example, a helical spring (not shown). Pressing push button 108 causes pressure to flow into the fluid in tubes 74 and 182, and thus bellows 184 (FIG. 4a) in actuator housing 128.
Affected by. This in turn engages the drive wedge 186 and wedge follower 132 to allow pressure plate assembly 11
8 causes the ventricle 12 to compress. It should be appreciated that other procedural pump designs are possible, for example the push button 108 could have a flexible drive rod connection in the absence of a fluid coupling system.

The ventricular assist devices 10-10 according to the present invention may be advantageous in that they can normally support total cardiac output, respectively, if desired. Each of the devices 10-10, for example, has a left ventricle 12-12 of 120 mm with a continuous stroke volume of 7-10 liters / minute without exceeding a pumping rate of 120 beats / minute.
It can support a mean arterial pressure of Hg (which can typically be associated with a peak arterial pressure of 150 mmHg) and a maximum filling pressure of about 150 mmHg. Moreover, the rate of rise and fall of pump-assisted pressure is low enough to avoid excessive blood turbulence, hemolysis or blood cavity formation. Additionally, pressure plate assemblies 118-118 or elastic bands 300-30 outside the ventricular chambers of the hearts 102-102.
0'does not interfere with venous return, does not weaken the organ system, or reduces blood circulation in the coronary arteries. Devices 10-10 are also present in certain previously known ventricular assist devices and can be compromised by fibrous tissue encapsulation and require alternative replacement of gas diffused through the compliance chamber material. Eliminates the need for a compliance chamber (displacement volume that compensates for periodic changes in volume between the pump sac and the containment shell). The present invention also eliminates the need for valves with inherent and well documented problems in previously known cardiac assist devices.

Each of the ventricular assist devices 10-10 is also advantageous in that it reduces the total weight of all implantable elements as compared to the total weight of known prior art ventricular assist devices. The total weight of the elements, including the battery 166, is in the range of 400-500 g,
That corresponds to a quarter reduction in weight from the known prior art systems, which generally weigh between 1,500 and 2,000 g.

Another advantage of ventricular assist device 10 is bellows 180 and 184.
The fluid coupling between and forms a fail-safe mechanism whereby the heart mechanism 10 is activated in the event of pump mechanism 20 motor failure.
The second is not to limit natural movement. Further, some aspects of the invention implant the motor housing 22 separately,
Only pump mechanism 20 can be implanted adjacent to the heart. Moreover, for all ventricular assist devices 10-10, the electronic module 30 need not be implanted near the pump mechanism 20-20 ', but can be implanted remotely. This modular structure facilitates element replacement in the event of any insufficiency and allows flexibility in determining the optimal implantation site for the individual patient physiology.

In summary, new and improved biocompatible ventricular assist and arrhythmia control devices 10-10 have been disclosed. For example, the device 10 is fully and easily implantable in the body of a patient user, eliminates the need for binding to an external power source, has a relatively simple, lightweight and compact construction, and is simply small for long-term reliable operation. Requires a large amount of energy, and incorporates a control mechanism for determining the left ventricular stroke volume and changing the compression force as needed,
It ensures proper supply of oxygenated blood and also includes bradycardia and tachyarrhythmia control features, which facilitate device operation in synchronization with left ventricular contractions. Further, the rechargeable power source 32 of the device 10 can be easily recharged transcutaneously and the device can be programmed and interrogated non-invasively. The device 10 does not allow foreign non-biological material to come into contact with the blood stream, thereby avoiding the evidence of demonstrated clot and associated bodily dysfunction. The device 10 can also provide effective mechanical circulatory support to the ventricles 12 of the heart 102 during postoperative recovery of myocardial function.

All content contained in the above description and shown in the drawings is intended to be illustrative rather than limiting. It is also to be understood that the appended claims are intended to cover all such inclusive and specific features of the invention.

[Brief description of drawings]

1 is a schematic block diagram of a ventricular assist device of a first aspect according to the present invention, and FIG. 2a is a schematic general front view of an upper part of a human body implanted with the ventricular assist device of the first aspect of the present invention, 2b is a schematic general plan view taken along line 2b-2b in FIG. 2a, FIG. 3a is a schematic front view of the electronic module for the device, and FIG. 3b is an electronic module shown in FIG. 3a. 4a is a schematic side view of FIG. 4a is an enlarged front view of the direct heart pump mechanism of the first aspect of the present invention, and FIG. 4b is the pump mechanism shown in FIG. 4a illustrating first and second operating positions. FIG. 4c is a plan view taken along line 4c-4c in FIG. 4a, and FIG. 4d is a plan view taken generally along line 4d-4d in FIG. 2a. Is an enlarged sectional view of the drive mechanism according to the first aspect of Figure 4e is a partial sectional view taken along line 4e-4e in Figure 4d, Figure 4f is a sectional view taken along line 4f-4f in Figure 4d, and Figure 5a is of the present invention. Fig. 5 is a sectional front view of a portion of the second aspect, Fig. 5b is a front view taken along the line 5b-5b in Fig. 5a, and Fig. 6 is a side view of the upper part of the ventricular compression mechanism of the ventricular assist device. FIG. 7 is a cross-sectional view of the portion of the ventricular compression mechanism shown in FIG. 6 taken along line 7-7 and FIG. 8 is the opposite side of the portion of the ventricular compression mechanism shown in FIG. Figure 9 is a schematic diagram of the third aspect of the invention in the first operating position, Figure 10 is a schematic diagram showing the aspect of Figure 9 in the second operating position, and Figure 11 is the present invention. 4 is a schematic diagram of a fourth aspect of FIG. 10 ... Ventricular assist device, 12 ... Left ventricle, 14 ... Implantable subsystem, 16 ... Subsystem, 20 ... Pump mechanism, 22 ... Motor housing, 24 ... Motor, 26 ... Rotation-linear motion conversion device, 28 ... Control system , 30 ... Electronic module, 32 ... Rechargeable power source, 34 ... Energy storage device, 36 ... Pacer device, 38 ... Cardioverter / defibrillator device, 40 ... Recorder, 42 ... Alarm device, 44 ... Manual pump, 46 ... Transcutaneous power supply, 48, 50 ... Programmer / inquiry device.

Claims (5)

[Claims] 1. A first assembly member having an assembly outer peripheral surface at one end, and a second assembly member having an assembly inner peripheral surface at one end, wherein the first assembly member is a second assembly member. A first band-shaped engaging member which is inserted into and assembled to the assembly member at one end thereof and is inclined to the assembly outer peripheral surface of the first assembly member at a predetermined angle with respect to a direction perpendicular to an axis line of the assembly direction. A second part that forms a part, is inclined to the assembly inner peripheral surface of the second assembly member by a predetermined angle with respect to the direction perpendicular to the axis of the assembly direction, and can engage with the first strip-shaped engaging part. Of the first and second assembly members, so that the first and second assembly members have a predetermined inclination around the axis of the assembling direction. At the relative rotation position, the first and second belts are assembled together with the elastic seal member interposed. The assembly formed by mutually brought hook engaged with the engagement portion. 2. The assembly according to claim 1, wherein the first and second assembly members are provided with means for restricting positional deviation in the rotational direction of both members at the predetermined relative rotational position. 3. The first strip-shaped engaging portion is formed on the outer peripheral surface of the first assembly member in its half-circumferential region and in another semi-circular region so that the inclination directions are opposite to each other, and The strip-shaped engaging portion is formed on the inner peripheral surface of the second assembly member in the half circumferential region and the other semi-circular region so that the inclination directions are opposite to each other, and the first and second strip-shaped engaging portions are formed. Both of them have the same inclination direction in each half circumference region.
The described assembly. 4. A first assembly member comprising a first assembly member projecting from an outer peripheral surface of the first assembly member.
Is a tubular housing of an oxygenator having a fluid communication port of
In an assembly in which the second assembly member is a lid body having a second fluid passage port projectingly provided on the outer peripheral surface, the first fluid passage port and the second fluid passage port are arranged at a predetermined relative rotational position. The assembly according to any one of claims 1 to 3, wherein the cylindrical housing and the lid are engaged with each other in the axial direction so as to be aligned with each other. 5. The gripping means grips the assembled end portions of the first assembly member and the second assembly member in a state of facing each other, and aligns both members with a predetermined relative rotational position around the axis, 5. The members are relatively moved along the axial direction of both members and hooked with each other.
A method for manufacturing the assembly according to any one of 1.