Low-residue paste conveying device

Abstract

The invention relates to a low-residue paste conveying device. The paste conveying device comprises a conveyor, a needle head, a conveying needle seat and a needle seat connector, the conveyor is provided with a needle cylinder for outputting paste; the needle head is provided with a paste output cavity; the conveying needle head comprises a needle cylinder mounting part and a needle head mounting part; a residual space is formed among the needle cylinder, the side wall of the needle cylinder mounting inner cavity and the paste output cavity of the needle head; the needle seat connector is provided with a throttling cavity penetrating through the needle seat connector, the residual space is filled with the needle seat connector, the needle seat connector is connected with the needle head and the needle cylinder, and the paste output cavity is communicated with the needle cylinder through the throttling cavity. Thus, by arranging the needle seat connector, the needle cylinder is directly communicated with the paste output cavity of the needle head through the throttling cavity of the needle seat connector, waste of paste in residual space can be reduced, the utilization rate of the paste is further increased, and the treatment cost of related use of the paste is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a low-residue paste delivery device. Background Art

[0002] Root canal treatment typically involves removing the dead or infected pulp, cleaning and shaping the canal, and sealing it with a filling material such as a paste.

[0003] The process of paste filling is to use a paste delivery device to fill the paste into the root canal. The delivery device is equipped with a delivery needle, which is composed of a needle tube and a needle seat. The needle seat includes a needle tube mounting part and a connecting part. The needle tube is fixed to the needle tube mounting part, and the connecting part is used to connect with the syringe of the delivery device. The front end interface of the delivery device syringe is plugged into the inner cavity of the connecting part of the needle tube. When the paste is delivered, the space formed by the needle seat connecting part and the front end of the syringe becomes the residual space. When the paste is pushed from the syringe to the needle tube, the paste remains in this residual space and cannot be filled into the root canal, resulting in a waste of paste, reducing the utilization rate of the paste and increasing the cost of treatment. Summary of the invention

[0004] Based on this, it is necessary to provide a low-residue paste delivery device that can reduce paste waste, improve paste utilization, and reduce treatment costs.

[0005] The present application provides a low-residue paste delivery device, comprising: a delivery device, a needle, a delivery needle seat, and a needle seat connector;

[0006] The conveyor has a syringe for outputting the paste;

[0007] The needle has a paste output cavity;

[0008] The delivery needle comprises a syringe mounting portion and a needle mounting portion, the syringe mounting portion having a syringe mounting inner cavity, the syringe mounting portion being mounted on the syringe through the syringe mounting inner cavity, the needle mounting portion having a needle mounting cavity, the relative inner diameter of the needle mounting cavity being smaller than the inner diameter of the syringe mounting inner cavity, the needle mounting cavity being communicated with the syringe mounting inner cavity, the needle mounting cavity being communicated with the syringe through the syringe mounting inner cavity, the needle being inserted into and mounted in the needle mounting cavity, the first end of the needle extending into the syringe mounting inner cavity, the second end of the needle extending out of the needle mounting cavity, a residual space being formed between the syringe, the side wall of the syringe mounting inner cavity and the paste output cavity of the needle;

[0009] The needle seat connector has a throttling cavity penetrating the needle seat connector, the needle seat connector fills the residual space, and the needle seat connector is respectively connected to the needle and the syringe, and the paste output cavity is connected to the syringe through the throttling cavity.

[0010] In one embodiment, the first end of the needle extends into the throttling chamber.

[0011] In one embodiment, the needle hub connector has a cylindrical structure, a cylindrical structure with a platform, an oblique cylindrical structure, or an oblique cylindrical structure with a platform.

[0012] In one of the embodiments, the needle hub connector has an injection molding structure, an extrusion molding structure or a 3D printing molding structure.

[0013] In one of the embodiments, the central axes of the paste output cavity, the throttling cavity and the syringe coincide with each other, or the central axes of the throttling cavity and the syringe are offset within 1 mm.

[0014] In one of the embodiments, when the needle seat connector is installed in the residual space, a resin adhesive layer or a light-cured adhesive layer is formed between the needle seat connector and the side wall of the syringe installation cavity.

[0015] In one of the embodiments, when the needle hub connector is installed in the residual space, the needle hub connector is mechanically fixed to the syringe installation cavity.

[0016] In one embodiment, the delivery needle seat is threadedly mounted on the syringe.

[0017] In one embodiment, the syringe has a delivery head extending into the syringe installation cavity, and the delivery head abuts against the needle seat connector.

[0018] In one embodiment, the delivery head extends into the throttling cavity, and the delivery head is pressed against the needle seat connector on the side wall of the throttling cavity;

[0019] In one embodiment, the needle seat connector is made of metal or non-metal, wherein the metal material includes any one of nickel-titanium alloy, stainless steel, cobalt-chromium alloy and titanium alloy; the non-metal material includes any one of polypropylene, TPU and resin material.

[0020] The above-mentioned low-residue paste delivery device, by providing a needle seat connector and filling the needle seat connector in the residual space, allows the syringe to directly connect to the paste output cavity of the needle through the throttling cavity of the needle seat connector, which can reduce the waste of paste in the residual space, ensure that the paste is directly connected to the needle through a relatively small throttling cavity, reduce the residual waste of paste between the needle seats, and thus improve the utilization rate of the paste and reduce the treatment cost of paste-related use. Moreover, the needle seat connector of the present application can be directly filled in the existing delivery needle seat, avoiding a significant change in the structure of the existing delivery needle seat, and reducing the problem of paste residue and waste by adding an additional needle seat connector. The needle seat connector of the present application can be installed on a conventional needle seat currently on the market, so that the connector can be installed without changing the original needle seat structure, which is economical and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic cross-sectional structure diagram of a low-residue paste delivery device according to an embodiment;

[0022] Figure 2 for Figure 1 Exploded diagram of

[0023] Figure 3a It is a structural schematic diagram of a needle seat connector of a paste delivery device according to an embodiment;

[0024] Figure 3b It is a structural schematic diagram of a needle seat connector of a paste delivery device according to an embodiment;

[0025] Figure 3c It is a structural schematic diagram of a needle seat connector of a paste delivery device according to an embodiment;

[0026] Figure 3d It is a structural schematic diagram of a needle seat connector of a paste delivery device according to an embodiment;

[0027] Figure 3e It is a structural schematic diagram of a needle seat connector of a paste delivery device according to an embodiment;

[0028] Figure 3f It is a structural schematic diagram of a needle seat connector of a paste delivery device according to an embodiment;

[0029] Figure 3g It is a structural schematic diagram of a needle seat connector of a paste delivery device according to an embodiment;

[0030] Figure 3h It is a structural schematic diagram of a needle seat connector of a paste delivery device according to an embodiment;

[0031] Figure 3i It is a structural schematic diagram of a needle seat connector of a paste delivery device according to an embodiment;

[0032] Figure 4a It is a structural schematic diagram of a needle base connector of a paste delivery device according to an embodiment being installed on a delivery needle base;

[0033] Figure 4b It is a structural schematic diagram of a needle base connector of a paste delivery device according to an embodiment being installed on a delivery needle base;

[0034] Figure 4c It is a structural schematic diagram of a needle base connector of a paste delivery device according to an embodiment being installed on a delivery needle base;

[0035] Figure 4d It is a structural schematic diagram of a needle base connector of a paste delivery device according to an embodiment being installed on a delivery needle base;

[0036] Figure 4e It is a structural schematic diagram of a needle base connector of a paste delivery device according to an embodiment being installed on a delivery needle base;

[0037] Figure 4f It is a structural schematic diagram of a needle seat connector of a paste delivery device according to an embodiment being installed on a delivery needle seat. DETAILED DESCRIPTION

[0038] In order to facilitate the understanding of the present invention, in order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, and preferred embodiments of the present invention are given in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood. The present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited to the specific embodiments disclosed below. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the description of the present invention, the meaning of "several" is at least one, such as one, two, etc., unless otherwise clearly and specifically defined. It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a centered element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used herein are only for the purpose of describing specific implementation methods and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0039] This application provides a low-residue paste delivery device, please refer to Figure 1 and Figure 2 The paste delivery device comprises: a delivery device 2, a needle 3, a delivery needle seat 1 and a needle seat connector 5; the delivery device 2 has a syringe 21 for delivering the paste; the needle 3 has a paste delivery cavity 31;

[0040] The delivery needle 1 includes a syringe mounting portion 11 and a needle mounting portion 12, wherein the syringe mounting portion 11 has a syringe mounting inner cavity 111, and the syringe mounting portion 11 is mounted on the syringe 21 through the syringe mounting inner cavity 111, and the needle mounting portion 12 has a needle mounting cavity 121, and the relative inner diameter of the needle mounting cavity 121 is smaller than the inner diameter of the syringe mounting inner cavity 111, and the needle mounting cavity 121 is connected to the syringe mounting inner cavity 111, and the needle mounting cavity 121 is connected to the syringe mounting inner cavity 111 through The syringe installation cavity 111 is connected to the syringe 21, the needle 3 is inserted and installed in the needle installation cavity 121, the first end of the needle 3 extends into the syringe installation cavity 111, and the second end of the needle 3 extends out of the needle installation cavity 111. A residual space 1111 is formed between the syringe 21, the side wall of the syringe installation cavity 111 and the paste output cavity 31 of the needle 3; if the residual space is not processed, it is very easy to leave residual paste when delivering the paste. The residual space can also be understood as the cavity gap formed between the syringe, the needle and the delivery needle seat.

[0041] The needle seat connector 5 has a throttling cavity 54 that penetrates the needle seat connector 5, the needle seat connector 5 fills the residual space 1111, and the needle seat connector 5 is respectively connected to the needle 3 and the syringe 21, and the paste output cavity 31 is connected to the syringe 21 through the throttling cavity 54. For example, the throttling cavity has a circular cross-section, for example, the aperture of the throttling cavity gradually decreases from the direction close to the needle, of course, the aperture of the throttling cavity can also be constant or in other situations.

[0042] The above-mentioned low-residue paste delivery device, by providing a needle seat connector 5 and filling the needle seat connector 5 in the residual space 1111, enables the syringe 21 to directly connect to the paste output cavity 31 of the needle 3 through the throttling cavity 1111 of the needle seat connector 5, which can reduce the waste of paste in the residual space, ensure that the paste is directly connected to the needle 3 through the relatively small throttling cavity 54, reduce the residual waste of paste between the needle seats, and thus improve the utilization rate of the paste, and reduce the treatment cost related to the use of the paste. Moreover, the needle seat connector 5 of the present application can be directly filled in the existing delivery needle seat, avoiding a significant change in the structure of the existing delivery needle seat, and reducing the problem of paste residue and waste by adding an additional needle seat connector.

[0043] In one embodiment, the delivery needle seat 1 is threadedly installed on the syringe 21. In this way, installation and disassembly are convenient and quick. When the needle seat is connected to the syringe interface, the syringe interface part contacts the needle seat connector, and the syringe interface can be wrapped around the outside of the needle seat connector, or it can enter the hole in the middle of the connector and the throttling cavity. For example, the syringe 21 has a delivery head 211 that extends into the syringe installation inner cavity 111, and the delivery head 211 abuts against the needle seat connector 5. For example, the delivery head extends into the throttling cavity, and the delivery head abuts against the needle seat connector on the side wall of the throttling cavity; in this way, the residue in the paste delivery can be further reduced.

[0044] In one embodiment, the first end of the needle 3 extends into the throttling cavity 51. Thus, by extending the needle into the throttling cavity 51, the paste residue can be further reduced.

[0045] In one embodiment, the central axes of the paste output cavity 31, the throttling cavity 51 and the syringe 21 coincide with each other, or the central axes of the throttling cavity and the syringe are offset within 1 mm, so that the paste can be quickly delivered and the residue can be reduced.

[0046] See also Figures 3a to 3i and Figures 4a to 4f The needle seat connector (5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h, 5i) is used to be installed in the syringe installation inner cavity 111 of the delivery needle seat 1. The needle seat connector (5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h, 5i) includes a connector body, and the connector body has a first abutting flat wall 51 and a second abutting flat wall 52 opposite to each other. The first abutting flat wall 51 and the second abutting flat wall 52 are both straight walls. The connector body also has a connecting side wall 53 connected between the first abutting flat wall 51 and the second abutting flat wall 52. The first abutting flat wall 51 is located on the side of the needle tube adjacent to the needle, and the second abutting flat wall 52 is located on the side adjacent to the syringe. The throttling cavity 54 of the connector body passes through the first abutting flat wall and the second abutting flat wall. By providing the first abutting flat wall 51 and the second abutting flat wall 52 , it is convenient to install the needle hub connector into the syringe installation inner cavity 111 .

[0047] See also Figures 3a to 3i and Figures 4a to 4f In this application, Figures 3a to 3i Specific examples of various needle hub connectors 5 are given. Figures 4a to 4fSeveral schematic diagrams of the needle hub connector 5 installed on the delivery needle hub 1 are given. For example, the needle hub connector has a cylindrical structure, a cylindrical structure with a platform, an oblique cylindrical structure, or an oblique cylindrical structure with a platform. For example, the outer shape of the connector body is a cylindrical structure or a cylindrical structure with a platform. Figure 3f , Figure 3g In the case of Figure 3c , Figure 3d , Figure 3e The platform in this embodiment can also be understood as a disc-shaped portion. For example, the shape of the connector body is an oblique cylindrical structure or an oblique cylindrical structure with a platform. Figure 3a In the case of an oblique cylindrical structure with a platform, such as Figure 3b , Figure 3c situation.

[0048] In one embodiment, see Figure 3h and Figure 3i The connector body of the connector 5 is also provided with an extension portion 55 protruding from the first abutting flat wall 51, and the throttling channel 54 passes through the extension portion 55. By providing the extension portion 55, it is convenient to extend the throttling channel 54 to the needle installation cavity where the needle is installed.

[0049] In one embodiment, the needle hub connector has an injection molding structure, an extrusion molding structure or a 3D printing molding structure. In other words, the needle hub connector of the present application can be formed by injection molding, extrusion molding or 3D printing.

[0050] In one embodiment, when the needle seat connector is installed in the residual space, a resin glue layer or a light-curing glue layer is formed between the needle seat connector and the side wall of the syringe installation inner cavity. For example, when the needle seat connector is installed in the residual space, the needle seat connector is mechanically fixed to the syringe installation inner cavity. In other words, the needle seat connector can be processed separately from the needle seat and then assembled, and the connector and the needle seat can be combined together by resin glue bonding, light-curing glue bonding, or mechanical fixing.

[0051] In one embodiment, the needle seat connector is made of metal or non-metal, wherein the metal material includes any one of nickel-titanium alloy, stainless steel, cobalt-chromium alloy and titanium alloy; the non-metal material includes any one of polypropylene, TPU and resin material.

[0052] The above-mentioned low-residue paste delivery device, by providing a needle seat connector and filling the needle seat connector in the residual space, enables the syringe to directly connect to the paste output cavity of the needle through the throttling cavity of the needle seat connector, which can reduce the waste of paste in the residual space, ensure that the paste is directly connected to the needle through a relatively small throttling cavity, reduce the residual waste of paste between the needle seats, and thus improve the utilization rate of the paste and reduce the treatment cost related to the use of the paste. Moreover, the needle seat connector of the present application can be directly filled in the existing delivery needle seat, avoiding a significant change in the structure of the existing delivery needle seat, and reducing the problem of paste residue and waste by adding an additional needle seat connector.

[0053] It should be noted that the low-residue paste delivery device provided by the present application, the delivery device that reduces residue and improves paste utilization, includes a delivery needle and a conveyor, and the conveyor includes a syringe and a push rod. The needle seat connector of the present application can be installed on a conventional needle seat currently on the market, so that the connector is installed without changing the original needle seat structure, which is economical and convenient. When the needle seat connector and the needle seat are separately processed and then assembled, the connector and the needle seat can be combined together by resin glue bonding, light-curing glue bonding, and mechanical clamping. The needle seat with a connector can be formed by injection molding, extrusion molding, and 3D printing. The needle seat connector can be processed by injection molding, extrusion molding, 3D printing, and machining. The material of the needle seat connector can be metal or non-metal. The metal material can be nickel-titanium alloy, stainless steel, cobalt-chromium alloy, titanium alloy, etc. The non-metallic material can be polypropylene, TPU, resin material, etc. When the needle seat is connected to the syringe interface, the syringe interface part contacts the needle seat connector. The syringe interface can be wrapped outside the needle seat connector or enter the hole and throttling cavity in the middle of the connector. When the syringe interface of the conveyor is connected to the needle seat connector, the paste conveyed from the conveyor can directly enter the needle seat connector through the syringe interface and be conveyed to the needle tube. This avoids the paste remaining in the residual space between the needle seat and the syringe interface, and improves the paste utilization rate.

[0054] In addition, the present application can also: the needle seat adopts a needle seat of traditional structure, that is, the inner cavity of the part where the needle seat and the syringe joint are connected does not have a protrusion, that is, a delivery head. The delivery head can further reduce the paste residue.

[0055] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. It should be noted that "in one embodiment", "for example", "for example", etc. in this application are intended to illustrate the present application, rather than to limit the present application. The above-described embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, several variations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A low-residue paste delivery device, characterized in that: include: a conveyor having a syringe for outputting the paste; a needle having a paste output cavity; A delivery needle seat, wherein the delivery needle comprises a syringe mounting portion and a needle mounting portion, the syringe mounting portion having a syringe mounting inner cavity, the syringe mounting portion being mounted on the syringe through the syringe mounting inner cavity, the needle mounting portion having a needle mounting cavity, the relative inner diameter of the needle mounting cavity being smaller than the inner diameter of the syringe mounting inner cavity, the needle mounting cavity being communicated with the syringe mounting inner cavity, the needle mounting cavity being communicated with the syringe through the syringe mounting inner cavity, the needle being inserted into and mounted in the needle mounting cavity, the first end of the needle extending into the syringe mounting inner cavity, the second end of the needle extending out of the needle mounting cavity, a residual space being formed between the syringe, the side wall of the syringe mounting inner cavity and the paste output cavity of the needle; A needle seat connector, wherein the needle seat connector has a throttling cavity penetrating the needle seat connector, the needle seat connector fills the residual space, and the needle seat connector is respectively connected to the needle and the syringe, and the paste output cavity is connected to the syringe through the throttling cavity.

2. The low-residue paste delivery device according to claim 1, characterized in that: The first end of the needle extends into the throttling cavity.

3. The low-residue paste delivery device according to claim 1, characterized in that: The needle seat connector has a cylindrical structure, a cylindrical structure with a platform, an oblique cylindrical structure or an oblique cylindrical structure with a platform.

4. The low-residue paste delivery device according to claim 1, characterized in that: The needle seat connector has an injection molding structure, an extrusion molding structure or a 3D printing molding structure.

5. The low-residue paste delivery device according to claim 1, characterized in that: The central axes of the paste output cavity, the throttling cavity and the syringe coincide with each other, or the central axes of the throttling cavity and the syringe are offset within 1 mm.

6. The low-residue paste delivery device according to claim 1, characterized in that: When the needle seat connector is installed in the residual space, a resin adhesive layer or a light-cured adhesive layer is formed between the needle seat connector and the side wall of the syringe installation inner cavity.

7. The low-residue paste delivery device according to claim 1, characterized in that: When the needle seat connector is installed in the residual space, the needle seat connector is mechanically fixed to the syringe installation inner cavity.

8. The low-residue paste delivery device according to claim 1, characterized in that: The delivery needle seat is threadedly mounted on the syringe.

9. The low-residue paste delivery device according to claim 8, characterized in that: The syringe is provided with a delivery head extending into the syringe installation inner cavity, and the delivery head abuts against the needle seat connector.

10. The low-residue paste delivery device according to claim 9, characterized in that: The delivery head extends into the throttling cavity, and the delivery head is pressed against the needle seat connector on the side wall of the throttling cavity; And / or, the needle seat connector is made of metal or non-metal, the metal material includes any one of nickel-titanium alloy, stainless steel, cobalt-chromium alloy and titanium alloy; the non-metal material includes any one of polypropylene, TPU and resin material.

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