JP7373945B2 - medical equipment - Google Patents

Description

TECHNICAL FIELD This disclosure relates to medical devices.

A mounting wall in which an opening is formed, an elongated member that passes through the opening and moves in the longitudinal direction by a driving force from a driving source, a boot that is disposed radially outward with respect to the elongated member, and one end of the boot. BACKGROUND OF THE INVENTION Medical instruments are known that have a mounting member that is mounted to a mounting wall. For example, in the medical device described in Patent Document 1, one end of the boot has an inward flange extending radially inward, and the mounting member cooperates with the mounting wall to extend the inward flange longitudinally. It is configured so that it can be attached to a mounting wall by sandwiching it in the direction.

Japanese Patent Application Publication No. 2010-88564

However, the medical device described in Patent Document 1 is expensive due to the need to increase the thickness of the mounting wall in order to secure the mounting strength of one end of the boot as a cover member to the mounting wall. There was room for improvement in some aspects.

In view of these points, an object of the present disclosure is to provide a medical device that can easily secure the mounting strength of a cover member to a mounting wall.

A medical device as one aspect of the present invention includes: a mounting wall including an inner circumferential surface of an opening that partitions the opening; an elongated member that passes through the opening and moves in the longitudinal direction by a driving force from a drive source; an annular cover member having one end to be inserted and disposed radially outward of the elongate member with respect to the elongate member; the one end of the cover member cooperating with the inner circumferential surface of the opening; and a mounting member that attaches the one end portion of the cover member to the mounting wall by sandwiching the cover member with the mounting member.

In one embodiment of the present invention, the medical device is attached to the attachment wall by the attachment member pressing the one end of the cover member toward the inner peripheral surface of the opening.

In one embodiment of the present invention, the medical device includes an attached state in which the attachment member attaches the one end of the cover member to the attachment wall, and an attachment state in which the one end of the cover member is attached to the attachment wall. It is possible to change between the release state and the release state.

In one embodiment of the present invention, the medical device includes: the attachment member includes an outer member and an inner member located radially inward of the elongated member with respect to the outer member; moves relative to the outer member in the longitudinal direction and presses the outer member radially outward, thereby changing from the released state to the attached state.

In one embodiment of the present invention, the outer member includes an engagement convex portion that protrudes inward in the radial direction and receives a pressing force from the inner member in the radially outward direction in the attached state. have

In one embodiment of the present invention, in the medical device, the inner member has an engagement recess that engages with the engagement protrusion of the outer member in the released state.

In one embodiment of the present invention, the medical device is such that the inner member has a pressing portion that presses the engagement convex portion of the outer member radially outward in the attached state, and the pressing portion is , is located in a direction from the one end of the cover member toward the other end of the cover member with respect to the engagement recess.

In one embodiment of the present invention, the medical device includes the outer member having a locking protrusion that faces the end surface of the one end of the cover member and projects outward in the radial direction, and In the attached state, the locking protrusion protrudes beyond the inner circumferential surface of the opening of the mounting wall to the outside in the radial direction.

In one embodiment of the present invention, the medical instrument is connected to the other end of the cover member, and an end that presses the pusher of the syringe by moving in the longitudinal direction together with the elongated member. It has a member.

According to the present disclosure, it is possible to provide a medical instrument that can easily ensure the mounting strength of the cover member to the mounting wall.

FIG. 1 is an external perspective view showing a medical device according to an embodiment of the present invention. FIG. 2 is a cross-sectional perspective view showing the attachment member and the like in the attached state of the medical instrument shown in FIG. 1; FIG. 2 is a cross-sectional perspective view showing the attachment member and the like in a released state in the medical device shown in FIG. 1 . FIG. 2 is an external perspective view showing the outer member of the attachment member in a released state in the medical device shown in FIG. 1; 2 is an external perspective view showing an inner member of a mounting member in the medical device shown in FIG. 1. FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A medical device according to an embodiment of the present invention will be explained in detail below with reference to the drawings.

As shown in FIG. 1, a medical device 1 according to this embodiment is configured as a syringe pump. However, the medical device 1 is not limited to this, and may be configured as a medical pump such as an infusion pump, a nutritional pump, a blood pump, or other medical devices.

As shown in FIGS. 1 and 2, the medical instrument 1 includes a mounting wall 2 having an inner peripheral surface 2b that defines an opening 2a, and a mounting wall 2 that passes through the opening 2a and is driven by a driving force from a drive source such as an electric motor (not shown). An elongated member 3 that moves in the longitudinal direction Dz, and an annular cover member 4 that is provided with one end portion 4a that is inserted into the opening 2a and is disposed on the radially outer side of the elongated member 3 with respect to the elongated member 3. have. The medical device 1 also includes a mounting member 5 that attaches the one end 4a of the cover member 4 to the mounting wall 2 by sandwiching the one end 4a of the cover member 4 in cooperation with the inner peripheral surface 2b of the opening. . In this way, one end 4a of the cover member 4 is sandwiched between the opening inner peripheral surface 2b and the mounting member 5, thereby attaching the one end 4a of the cover member 4 to the mounting wall 2. The mounting strength of the cover member 4 can be easily ensured.

In addition, in this embodiment, the longitudinal direction Dz means the direction along the central axis O of the elongate member 3, and the longitudinal direction one end side Dz1 is the direction along the other end 4b of the cover member 4 in the longitudinal direction Dz. This means the side on which one end portion 4a of the cover member 4 is located, and the other end side Dz2 in the longitudinal direction means the opposite side. In this embodiment, the radial direction means a direction perpendicular to the central axis O of the elongated member 3, and the circumferential direction means a direction that goes around the central axis O of the elongated member 3. .

The attachment member 5 is configured to be attached to the attachment wall 2 by pressing one end 4a of the cover member 4 toward the inner peripheral surface 2b of the opening. With such a configuration, the attachment strength of the cover member 4 to the attachment wall 2 can be further increased. Further, good waterproof properties, that is, good sealing properties can also be obtained. Note that the mounting member 5 can be attached to the cover by sandwiching the one end 4a of the cover member 4 in cooperation with the inner circumferential surface 2b of the opening without pressing the one end 4a of the cover member 4 toward the inner circumferential surface 2b of the opening. One end portion 4a of the member 4 may be configured to be attached to the mounting wall 2. Such a configuration can be realized, for example, by providing the opening inner circumferential surface 2b and the outer circumferential surface of the one end portion 4a of the cover member 4 with an uneven shape that engages with each other in the longitudinal direction Dz.

The mounting member 5 includes an outer member 6 made of, for example, synthetic resin, and an inner member 7 made of, for example, synthetic resin and located on the radially inner side of the elongated member 3 with respect to the outer member 6. Further, as shown in FIGS. 2 and 3, the mounting member 5 is configured such that the inner member 7 moves relative to the outer member 6 toward one end side Dz1 in the longitudinal direction, thereby pressing the outer member 6 radially outward. , the cover member 4 is configured to change from a released state in which the one end portion 4a of the cover member 4 is unattached to the mounting wall 2 to an attached state in which the one end portion 4a of the cover member 4 is attached to the mounting wall 2. Note that the mounting member 5 changes from the released state to the mounted state by pressing the outer member 6 radially outward by moving the inner member 7 relative to the outer member 6 toward the other end side Dz2 in the longitudinal direction. It may be configured as follows.

In this way, the attachment member 5 is configured to be deformable between the attached state and the released state. Therefore, when cleaning the case 8 having the mounting wall 2, the one end 4a of the cover member 4 can be removed from the mounting wall 2, which is convenient. However, the mounting member 5 may be configured such that one end portion 4a of the cover member 4 cannot be detached from the mounting wall 2. Further, the mounting member 5 is not limited to the configuration having the outer member 6 and the inner member 7, but may be configured by, for example, only one member.

As shown in FIGS. 2 and 4, the outer member 6 has an engaging protrusion 9 that projects radially inward and receives a radially outward pressing force from the inner member 7 in the attached state. As shown in FIGS. 3 and 5, the inner member 7 has an engagement recess 10 that engages with the engagement protrusion 9 of the outer member 6 in the released state. Therefore, separation of the outer member 6 and the inner member 7 can be prevented in the released state. Further, as shown in FIG. 2, the inner member 7 has a pressing portion 11 that presses the engagement convex portion 9 of the outer member 6 radially outward in the attached state. The pressing portion 11 is located in a direction from one end 4a of the cover member 4 toward the other end 4b of the cover member 4, that is, on the other end side Dz2 in the longitudinal direction, with respect to the engagement recess 10. Therefore, by moving the inner member 7 relative to the outer member 6 toward one end side Dz1 in the longitudinal direction from the released state, the engaging protrusion 9 can be pressed radially outward by the pressing portion 11 to bring it into the attached state. I can do it.

Note that the configurations of the outer member 6 and the inner member 7 are not limited to this. For example, the outer member 6 may be configured without the engagement protrusion 9. Furthermore, the inner member 7 may be configured without the engagement recess 10.

The outer member 6 has a locking convex portion 12 that faces the end surface 4c of the one end portion 4a of the cover member 4 and projects radially outward. The locking convex portion 12 is configured to protrude radially outward beyond the opening inner circumferential surface 2b of the mounting wall 2 in the installed state. Therefore, even if the outer member 6 moves toward the other end Dz2 in the longitudinal direction due to an external force, the locking convex portion 12 is locked to the peripheral edge of the opening 2a of the mounting wall 2, so that the cover member 4 is not moved relative to the mounting wall 2. The mounting strength can be further increased.

As shown in FIG. 4, the outer member 6 has an annular shape centered on the central axis O. As shown in FIG. In this embodiment, the outer member 6, the inner member 7, the cover member 4, and the opening 2a will be described as being arranged concentrically with the elongated member 3, but these may be arranged somewhat eccentrically with respect to the elongated member 3. You can stay there.

The outer member 6 also includes a plurality of one-end slits 13 extending from an end on one longitudinal end Dz1 toward the other longitudinal end Dz2 and arranged at intervals in the circumferential direction, and a plurality of one-end slits 13 on the other longitudinal end Dz2. It has a plurality of other end side slits 14 that extend from the end toward one end side Dz1 in the longitudinal direction and are lined up at intervals in the circumferential direction. Therefore, the outer member 6 can be elastically deformed smoothly in the radial direction between the attached state and the released state. Furthermore, the durability of the outer member 6 can be increased by alleviating internal stress caused by elastic deformation. Eight slits 13 at one end and eight slits 14 at the other end are provided, but the number can be changed as appropriate.

The outer member 6 is not limited to such a configuration; for example, it may be configured without at least one of the plurality of one end side slits 13 and the plurality of other end side slits 14, or it may be configured in a C-shape instead of an annular shape. You may.

The engagement convex portion 9 is composed of a plurality of engagement protrusions 9a arranged at intervals in the circumferential direction. Although 16 engaging protrusions 9a are provided, the number can be changed as appropriate. The locking convex portion 12 is composed of a plurality of locking protrusions 12a arranged at intervals in the circumferential direction. Although eight locking protrusions 12a are provided, the number can be changed as appropriate.

As shown in FIGS. 1 and 3, the cover member 4 has a folded shape that allows a main body portion 4d between one end 4a and the other end 4b to expand and contract in the longitudinal direction Dz. In this embodiment, a bellows shape is adopted as the folded shape, but other shapes may be adopted. One end portion 4a of the cover member 4 has an inward flange 4e extending radially inward from the main body portion 4d, and a cylindrical wall 4f extending from the inner circumferential edge of the inward flange 4e to one end side Dz1 in the longitudinal direction. An end surface on one longitudinal end side Dz1 of the cylindrical wall 4f serves as an end surface 4c of the one end portion 4a of the cover member 4. Preferably, the cover member 4 is made of an elastic material such as rubber or elastomer.

As shown in FIGS. 3 and 4, the outer member 6 has a holding protrusion 15 that faces the inward flange 4e of the one end 4a of the cover member 4 and projects radially outward. The holding protrusion 15 can cooperate with the locking protrusion 12 to hold one end 4a of the cover member 4. The holding protrusion 15 is composed of a plurality of holding protrusions 15a arranged at intervals in the circumferential direction. Eight holding protrusions 15a are provided, but the number can be changed as appropriate.

Note that the shape of the one end portion 4a of the cover member 4 is not limited to having the inward flange 4e. Furthermore, the outer member 6 is not limited to having the holding convex portion 15. In addition, in FIG. 4, only one end side slit 13, the other end side slit 14, the engagement protrusion 9a, the locking protrusion 12a, and the holding protrusion 15a are labeled with reference numerals.

As shown in FIG. 5, the inner member 7 has a cylindrical peripheral wall 7a and a flange wall 7b extending radially outward from the other end Dz2 in the longitudinal direction of the peripheral wall 7a. An engagement recess 10 is provided at an end on one longitudinal end side Dz1 of the outer peripheral surface of the peripheral wall 7a. Further, a pressing portion 11 is provided on the outer peripheral surface of the peripheral wall 7a. Note that, although the engaging recess 10 and the pressing portion 11 each extend in the circumferential direction, the present invention is not limited thereto. The flange wall 7b has a contact portion 7c that contacts the end portion of the outer member 6 on the other end side Dz2 in the longitudinal direction in the attached state. Although the contact portion 7c is configured of an annular surface extending in the circumferential direction, the contact portion 7c is not limited to this. Alternatively, a configuration may be adopted in which the contact portion 7c is not provided.

The inner member 7 having the flange wall 7b facilitates the operation of moving the inner member 7 toward the other end side Dz2 in the longitudinal direction relative to the outer member 6 in order to change from the attached state to the released state. I can do it. For example, a spatula-shaped tool is pressed from the outside in the radial direction of the cover member 4, and while deforming the cover member 4, the tool is pushed together with the cover member 4 between the flange wall 7b and the holding convex portion 15, so that the flange wall 7b is By pushing it out toward the other end side Dz2, the attached state can be changed to the released state. However, the inner member 7 is not limited to having the flange wall 7b. Further, the inner member 7 is not limited to having the cylindrical peripheral wall 7a, and may have various shapes.

Note that the elongated member 3, the inner member 7, the outer member 6, the one end 4a of the cover member 4, and the opening 2a are each configured to have a circular shape in a cross section perpendicular to the central axis O, but the present invention is not limited to this. For example, it may be elliptical or polygonal.

The medical device 1 also includes an end member 16 that is connected to the other end 4b of the cover member 4 and that presses a pusher of a syringe (not shown) by moving in the longitudinal direction Dz together with the elongated member 3. are doing. The medical device 1 has a mounting part 17 on which the syringe body is mounted, and by moving the end member 16 to one end side Dz1 in the longitudinal direction, the pusher is placed inside the syringe main body held on the mounting part 17. It can be pushed in. Therefore, the liquid within the syringe body can be pushed out from within the syringe body and delivered. In addition, although the mounting part 17 is comprised by the case 8, it is not limited to this. The mounting wall 2 provided in the case 8 has a substantially circular recess 2c, and has an opening 2a within the recess 2c. However, the shape of the mounting wall 2 can be designed as appropriate. Note that the elongated member 3 can be made of, for example, a metal material. Further, the case 8 can be made of, for example, a synthetic resin material.

It goes without saying that the embodiment described above is only one example of the embodiment of the present invention, and that various changes can be made without departing from the gist of the invention.

1 Medical instrument 2 Mounting wall 2a Opening 2b Opening inner peripheral surface 2c Recessed portion 3 Long member 4 Cover member 4a One end of the cover member 4b Other end of the cover member 4c End surface of one end of the cover member 4d Main body portion of the cover member 4e Inward flange 4f Cylindrical wall 5 Mounting member 6 Outer member 7 Inner member 7a Peripheral wall 7b Flange wall 7c Contact portion 8 Case 9 Engagement protrusion 9a Engagement protrusion 10 Engagement recess 11 Pressing portion 12 Locking protrusion 12a Locking Projection 13 One end slit 14 Other end slit 15 Holding convex portion 15a Holding projection 16 End member 17 Placement portion Dz Longitudinal direction Dz1 One longitudinal end Dz2 Other longitudinal end O Center axis

Claims (7)

a mounting wall including an inner circumferential surface of the opening that defines the opening;
an elongated member that passes through the opening and moves in the longitudinal direction by a driving force from a driving source;
an annular cover member having one end inserted into the opening and disposed radially outward of the elongate member with respect to the elongate member;
a mounting member that attaches the one end of the cover member to the mounting wall by sandwiching the one end of the cover member in cooperation with the inner peripheral surface of the opening;
The mounting member is
deformable between an attached state in which the one end of the cover member is attached to the mounting wall and a released state in which the one end of the cover member is released from the attachment wall;
an outer member; and an inner member located on the radially inner side of the elongated member with respect to the outer member, and when the inner member moves relative to the outer member in the longitudinal direction, the outer member The medical device changes from the released state to the attached state by pressing radially outward . The medical device according to claim 1, wherein the attachment member is attached to the attachment wall by pressing the one end of the cover member toward the inner peripheral surface of the opening. The medical device according to claim 1 , wherein the outer member has an engagement convex portion that projects in the radial direction and receives a pressing force from the inner member in the radially outer direction in the attached state. The medical device according to claim 3 , wherein the inner member has an engagement recess that engages the engagement protrusion of the outer member in the released state. The inner member has a pressing portion that presses the engagement convex portion of the outer member radially outward in the attached state,
The medical device according to claim 4 , wherein the pressing portion is located in a direction from the one end of the cover member toward the other end of the cover member with respect to the engagement recess. The outer member has a locking convex portion that faces the end surface of the one end portion of the cover member and protrudes outward in the radial direction,
The medical device according to any one of claims 1 to 5 , wherein the locking convex portion projects beyond the inner peripheral surface of the opening of the mounting wall in the radial direction in the attached state. Any one of claims 1 to 6 , further comprising an end member that is connected to the other end of the cover member and presses a pusher of a syringe by moving in the longitudinal direction together with the elongated member. Medical devices listed in .

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