Split type O-ring intestinal feeding device

Abstract

The present application relates to a kind of split O-ring intestinal feeding device, including cylinder and push rod, the front end of the push rod is provided with push rod upper cover;Push rod upper cover and the push rod between O-ring are provided, one side of the O-ring is in contact with the push rod upper cover, the other side is in contact with the push rod.This split O-ring intestinal feeding device provided by the present application, when using, when push rod is pushed and pulled, one side of O-ring is limited by the front end of push rod, the other side is limited by push rod upper cover, therefore, it is not easy to turn over, so that the side of O-ring keeps sufficient contact with the inner wall of cylinder, and the sealing performance is good;Because sealing ring is not easy to turn over, so its replacement piston rear thickness is greatly reduced, in turn, the contact area with the inner wall of cylinder is greatly reduced, so that the resistance when sealing element moves is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a split type O-ring intestinal feeding device. BACKGROUND

[0002] Intestinal feeding device is a commonly used medical device for assisting patients in eating. The existing intestinal feeding device generally uses a needle cylinder type intestinal feeding device. For example, a liquid feeding device for a digestive department in application No. 202021270609.8. The piston of this feeding device is arranged at the front end of the push rod. During pushing and pulling, the thickness of the piston is large, so the resistance is large, which is not convenient for medical staff to use. In order to reduce the resistance of the piston, some people apply medical silicone oil lubricant to the side surface of the piston during production. This method uses a large amount of medical silicone oil, which has relatively poor biocompatibility to the human body. Therefore, how to reduce the resistance of the sealing element while maintaining the sealing property of the sealing element has become a technical problem to be solved by people. SUMMARY

[0003] In view of the problems in the prior art, the present application provides a split type O-ring intestinal feeding device to solve at least one of the above technical problems.

[0004] In order to achieve the above-mentioned application purpose, one technical scheme provided by the present application is as follows:

[0005] A split type O-ring intestinal feeding device, comprising a cylinder and a push rod, wherein the front end of the push rod is provided with a push rod upper cover; an O-ring is arranged between the push rod upper cover and the push rod, one side of the O-ring abuts against the push rod upper cover, and the other side abuts against the push rod.

[0006] Preferably, the front end of the push rod is provided with an annular protrusion, and the O-ring is sleeved on the annular protrusion; the push rod upper cover comprises a cover body and a connecting portion, the cover body and the connecting portion are connected, and the connecting portion is connected with the push rod.

[0007] Preferably, the connecting portion is a column, the diameter of the connecting portion is smaller than the diameter of the cover body, the cover body and the connecting portion are coaxially arranged, so that the edge of the cover body extends out of the side surface of the connecting portion, the top surface of the push rod is provided with a hole for inserting the connecting portion, and the connecting portion is inserted into and fixed in the hole.

[0008] Preferably, the end of the connecting portion away from the cover body is provided with a clamping hook, and the hole is provided with a clamping groove matched with the clamping hook.

[0009] Preferably, the side of the cover away from the connecting part is a conical surface, and the shape of the inner side of the front end of the cylinder matches the shape of the cover; the position where the connecting part connects to the cover forms a conical cavity, the interior of the connecting part is hollow to form a cylindrical structure, a strip groove is provided circumferentially at the end of the connecting part away from the cover, and a rib is provided on the push rod corresponding to the position of the strip groove, the width of the rib being smaller than the width of the strip groove.

[0010] Preferably, the rib is disposed on the inner wall of the hole.

[0011] Preferably, the push rod includes a cross rod and a support plate disposed at the front end of the push rod. The annular protrusion is disposed on the support plate, and the hole is located at the center of the support plate with the same diameter as the inner diameter of the annular protrusion. The edge of the support rib of the cross rod protrudes upward to form a connecting end, which is connected to the support plate. There is a gap between the inner wall of the support plate and the connecting end, and the gap forms the slot in the circumferential direction. One or two support ribs of the cross rod form the ridge. A notch is provided on the annular protrusion corresponding to the position of the strip groove.

[0012] Preferably, a sealing rib is fitted onto the connecting part.

[0013] Preferably, the diameter of the cover is smaller than the outer diameter of the O-ring; the outer diameter of the push rod is smaller than the outer diameter of the O-ring.

[0014] Preferably, the thickness of the O-ring is greater than the thickness of the annular protrusion.

[0015] The split-type O-ring intestinal feeder provided by this invention, during use, is constrained on one side by the front end of the push rod and on the other side by the top cover of the push rod when the push rod is pushed or pulled. Therefore, it is not easy for the O-ring to flip over, thus ensuring that the side of the O-ring maintains full contact with the inner wall of the cylinder, resulting in good sealing performance. Because the sealing ring is not easy to flip over, its thickness is greatly reduced after replacing the piston, which in turn greatly reduces the contact area with the inner wall of the cylinder, thereby reducing the resistance when the sealing element moves. Of course, in actual production, to further reduce the resistance of the sealing element, medical-grade silicone oil can also be coated on the side of the O-ring. Since the thickness of the sealing ring is relatively small, the amount of medical-grade silicone oil used for lubrication during production can be significantly reduced, resulting in better biocompatibility with the human body. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of a split-type O-ring intestinal feeder provided in an embodiment is shown;

[0017] Figure 2 It shows Figure 1 Decomposition state diagram;

[0018] Figure 3 A structure diagram of a push rod upper cover in an embodiment is shown;

[0019] Figure 4 A partial structure diagram of a push rod in an embodiment is shown;

[0020] Figure 5 A top view of Figure 4

[0021] Markings in the drawings:

[0022] Cylinder 1;

[0023] Upper cover 2, cover body 2-1, connecting part 2-2, clamping hook 2-3, conical cavity 2-4, strip-shaped slot 2-5, clamping slot 2-6;

[0024] O-ring 3;

[0025] Push rod 4, annular protrusion 4-1, hole 4-2, support sheet 4-3, support sheet 4-3, support rib of cross rod 4-4, connecting end 4-41, gap 4-5. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0027] Embodiments, please refer to Figure 1 and Figure 2 ​The embodiment of the present application provides a split type O-ring intestinal feeding device, which comprises a barrel 1 and a push rod 4, and the front end of the push rod is provided with a push rod upper cover 2; in the embodiment, the push rod upper cover can be made of medical polypropylene, which is better in biocompatibility than silica gel; an O-ring 3 is arranged between the push rod upper cover and the push rod, one side of the O-ring abuts against the push rod upper cover, and the other side abuts against the push rod, wherein the O-ring can use a silica gel O-ring; in the present application, the push rod upper cover and the push rod can be connected by using an existing structure, such as a bolt connection; in the embodiment, the applicant designs the following structure: the front end of the push rod is provided with an annular protrusion 4-1, and the O-ring is sleeved on the annular protrusion; the push rod upper cover comprises a cover body 2-1 and a connecting portion 2-2, the cover body is connected with the connecting portion, and the connecting portion is connected with the push rod; in the embodiment, the connecting portion is columnar, and the diameter of the connecting portion is smaller than that of the cover body; the cover body and the connecting portion are coaxially arranged, so that the edge of the cover body extends out of the side surface of the connecting portion; the top surface of the push rod is provided with a hole 4-2 for inserting the connecting portion, and the connecting portion is inserted into and fixed in the hole; in order to further fix the push rod, the end of the connecting portion away from the cover body is provided with a clamping hook 2-3, and the hole is provided with a clamping groove 2-6 matched with the clamping hook.

[0028] The split type O-ring intestinal feeding device described above is sleeved with the O-ring on the annular protrusion, the connecting portion of the cover body is inserted into the hole, and the clamping hook is clamped in the clamping groove, so that the O-ring is limited between the cover body and the push rod; after the O-ring is assembled, the O-ring and the push rod are inserted into the barrel; when the push rod is pushed and pulled, one side of the O-ring is limited by the front end of the push rod, and the other side is limited by the push rod upper cover, so that the O-ring is not easy to be turned up, so that the side surface of the O-ring can keep in full contact with the inner wall of the barrel, and the sealing performance is good; since the sealing ring is not easy to be turned up, the thickness of the sealing ring is greatly reduced after replacing the piston, and the contact area with the inner wall of the barrel is greatly reduced, so that the resistance of the sealing member in movement is reduced. Of course, in actual production, in order to further reduce the resistance of the sealing member, medical silicone oil can also be coated on the side surface of the O-ring; since the thickness of the sealing ring is relatively small, the amount of medical silicone oil used for lubrication in production can be greatly reduced, and the biocompatibility to the human body is better.

[0029] In actual production, the clamping hook and the connecting portion are less deformed under stress and are not easy to enter the hole due to the limitation of volume and shape, so the applicant also designs as follows: refer to Figure 3, the one side of the cover body away from the connecting part is a conical surface, the shape of the inner side of the front end of the cylinder body matches the shape of the cover body; the position where the connecting part connects with the cover body forms a conical cavity 2-4, the inside of the connecting part is hollow to form a cylindrical structure, the one end of the connecting part away from the cover body is provided with a strip-shaped slot 2-5 in the circumferential direction, the corresponding position of the push rod to the strip-shaped slot is provided with a ridge, and the width of the ridge is smaller than the width of the strip-shaped slot.

[0030] When the structure is installed, when the clamping hook of the connecting part is pressed, first, the positions on both sides of the strip-shaped slot are deformed to the middle, at this time, due to the existence of the conical cavity, the edge position of the cover body is slightly deformed to the middle driven by the deformation of the connecting part, so that the diameter of the connecting part at the clamping hook position is reduced and a certain inclination is generated, which is beneficial to the connecting part entering the hole, the ridge corresponding to the strip-shaped slot is arranged to form positioning of the connecting part before and after installation, which is beneficial to the installation and fixation of the connecting part.

[0031] In the embodiment, the ridge can be directly arranged on the inner wall of the hole. In order to further facilitate the installation of the connecting part, the applicant has also made the following design: referring to Figures 4-5 , the push rod comprises a cross rod and a support sheet 4-3 arranged at the front end of the push rod, the annular protrusion is arranged on the support sheet, the hole is located at the central position of the support sheet, and the diameter is the same as the inner diameter of the annular protrusion; the edge position of the support rib 4-4 of the cross rod is upwardly protruded to form a connecting end 4-41, the connecting end is connected with the support sheet, there is a spacing between the inner wall of the support sheet and the connecting end, the spacing forms the clamping slot in the circumferential direction, and one or two support ribs of the cross rod form the ridge; the annular protrusion is provided with an opening 4-5 at the position corresponding to the strip-shaped slot. When the structure is used, the strip-shaped slot is aligned at the opening, then force is applied to the connecting part to deform the positions on both sides of the strip-shaped slot to the middle, although the deformation of the connecting part in the ridge direction (the direction of arrow E) is relatively small due to the fact that the force is generally not applied at the position of the strip-shaped slot (the direction of the force can refer to Figure 5 the direction of arrow F), the deformation of the connecting part in the force direction is relatively large, in this way, the position of the strip-shaped slot of the connecting part is deformed and is easy to pass through the opening to enter the hole, then the connecting part elastically restores to the original state when the force is eliminated, the clamping hook is clamped in the clamping slot, and the structure is especially suitable for the structure provided with two strip-shaped slots.

[0032] In actual production, a sealing rib can also be sleeved on the connecting part, or sealing ribs can also be added on the contact surfaces of the O-shaped ring and the push rod cover, so that the maximum positive and negative pressure sealing performance is obtained with the smallest interference amount. In actual production, the diameter of the cover body can be slightly smaller than the outer diameter of the O-shaped ring; the outer diameter of the push rod can be slightly smaller than the outer diameter of the O-shaped ring; and the thickness of the O-shaped ring can be slightly larger than the thickness of the annular protrusion.

[0033] It should be noted that, as used in this specification and the appended claims, the singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component" can include a combination of two or more components, and the term "an element" can include comparable reference to a plurality of elements. Also, as used in this specification and the appended claims, the term "or" is not intended to be exclusive, unless it is explicitly indicated to be so. Thus, for example, "A or B" means "A, B, or both A and B." Also, as used in this specification and the appended claims, the term "coupled" means either an indirect or direct electrical association or functional relationship between the things that are connected or related.

[0034] It should be readily understood that "on," "over," and "above" in the present disclosure are to be interpreted in the broadest context possible so that "on" means not only "directly on" but also includes the meaning of "on" with intervening features or layers therebetween, and "above" or "over" includes not only the meaning of "above" or "over" but also the meaning of "above" or "over" without intervening features or layers therebetween (i.e., directly on).

[0035] In addition, spatially relative terms, such as "beneath", "below", "lower", "above", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0036] It should be noted that, as used in this specification and the appended claims, the singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component" can include a combination of two or more components, and the term "an element" can include comparable reference to a plurality of elements. Also, as used in this specification and the appended claims, the term "or" is not intended to be exclusive, unless it is explicitly indicated to be so. Thus, for example, "A or B" means "A, B, or both A and B." Also, as used in this specification and the appended claims, the term "coupled" means either an indirect or direct electrical association or functional relationship between the things that are connected or related.

[0037] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A split-type O-ring intestinal feeder, comprising a cylindrical body (1) and a push rod (4), characterized in that, The front end of the push rod is provided with a push rod cover (2); An O-ring (3) is provided between the push rod cover and the push rod, with one side of the O-ring abutting against the push rod cover and the other side abutting against the push rod; The front end of the push rod is provided with an annular protrusion (4-1), and the O-ring is fitted on the annular protrusion; The push rod cover includes a cover body (2-1) and a connecting part (2-2), the cover body and the connecting part are connected, and the connecting part is connected to the push rod; The connecting part is cylindrical with a diameter smaller than that of the cover. The cover and the connecting part are coaxially arranged such that the edge of the cover extends out of the side of the connecting part. The top surface of the push rod is provided with a hole (4-2) for the connecting part to be inserted. The connecting part is inserted into the hole and fixed in the hole. A hook (2-3) is provided at the end of the connecting part away from the cover, and a groove (2-6) that cooperates with the hook is provided in the hole. The side of the cover away from the connecting part is a conical surface, and the shape of the inner side of the front end of the cylinder matches the shape of the cover. The connection between the connecting part and the cover forms a conical cavity (2-4). The interior of the connecting part is hollow, forming a cylindrical structure. A strip groove (2-5) is provided circumferentially at the end of the connecting part away from the cover. A rib is provided on the push rod corresponding to the position of the strip groove. The width of the rib is smaller than the width of the strip groove. The ribs are set on the inner wall of the hole; The push rod includes a cross rod and a support plate (4-3) disposed at the front end of the push rod. The annular protrusion is disposed on the support plate, and the hole is located at the center of the support plate, with a diameter the same as the inner diameter of the annular protrusion. The edge of the support rib (4-4) of the cross rod protrudes upward to form a connecting end (4-41). The connecting end is connected to the support plate. There is a gap between the inner wall of the support plate and the connecting end. The gap forms the slot in the circumferential direction. One or two support ribs of the cross rod form the ridge. The annular protrusion has a notch (4-5) corresponding to the position of the strip groove.

2. A split-type O-ring intestinal feeder according to claim 1, characterized in that, A sealing rib is fitted onto the connecting part.

3. A split-type O-ring intestinal feeder according to claim 1, characterized in that, The diameter of the cover is smaller than the outer diameter of the O-ring; The outer diameter of the push rod is smaller than the outer diameter of the O-ring.

4. A split-type O-ring intestinal feeder according to claim 1, characterized in that, The thickness of the O-ring is greater than the thickness of the annular protrusion.

Images