Low-residue paste conveying device

Abstract

The utility model 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] This utility model relates to the field of medical device technology, and in particular to a low-residue paste delivery device. Background Technology

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

[0003] The paste filling process involves using a paste delivery device to fill the root canal with paste. The delivery device has a delivery needle hub, and the needle consists of a needle tube and a needle hub. The needle hub includes a needle tube mounting section and a connecting section. The needle tube is fixed to the needle tube mounting section, and the connecting section is used to connect to the syringe barrel of the delivery device. The front end of the delivery device syringe inserts into the inner cavity of the connecting section of the needle tube. During paste delivery, the space formed between the needle hub connecting section and the front end of the syringe barrel becomes a residual space. As the paste is pushed from the syringe barrel to the needle tube, some paste remains in this residual space, thus failing to fill the root canal, resulting in paste waste, reduced paste utilization, and increased treatment costs. Utility Model Content

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

[0005] This application provides a low-residue paste delivery device, including: a delivery device, a needle, a delivery needle seat, and a needle seat connector;

[0006] The delivery device has a syringe for dispensing the paste;

[0007] The needle has a paste dispensing cavity;

[0008] The delivery needle hub includes a syringe mounting part and a needle mounting part. The syringe mounting part has a syringe mounting cavity and is mounted on the syringe through the syringe mounting cavity. The needle mounting part has a needle mounting cavity. The relative inner diameter of the needle mounting cavity is smaller than the inner diameter of the syringe mounting cavity. The needle mounting cavity is connected to the syringe mounting cavity and communicates with the syringe through the syringe mounting cavity. The needle is inserted into and mounted in the needle mounting cavity. The first end of the needle extends into the syringe mounting cavity, and the second end of the needle extends out of the needle mounting cavity. A residual space is formed between the syringe, the side wall of the syringe mounting cavity, and the paste output cavity of the needle.

[0009] The needle hub connector has a throttling cavity extending through it. The needle hub connector fills the residual space and is connected to both the needle tip and the syringe. 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 cavity.

[0011] In one embodiment, the pin 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 embodiment, the needle hub connector has an injection-molded structure, an extrusion-molded structure, or a 3D-printed structure.

[0013] In one embodiment, the central axes of the paste output cavity, the throttling cavity, and the syringe coincide.

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

[0015] In one embodiment, when the needle hub connector is installed in the residual space, the needle hub connector is mechanically secured to the syringe mounting cavity.

[0016] In one embodiment, the delivery needle seat is screwed onto the syringe.

[0017] In one embodiment, the syringe has a delivery head that extends into the syringe mounting cavity and abuts against the needle hub connector.

[0018] In one embodiment, 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;

[0019] In one embodiment, the pin connector is made of a metallic or non-metallic material. The metallic material includes any one of nickel-titanium alloy, stainless steel, cobalt-chromium alloy, and titanium alloy; the non-metallic material includes any one of polypropylene, TPU, and resin materials.

[0020] The aforementioned low-residue paste delivery device, by incorporating a needle hub connector that fills the residual space, allows the syringe to directly connect to the paste delivery cavity of the needle via the throttling chamber of the connector. This reduces paste waste in the residual space, ensuring the paste connects directly to the needle through a relatively small throttling chamber, minimizing paste residue and waste between the needle hubs, thereby improving paste utilization and reducing treatment costs associated with paste use. Furthermore, the needle hub connector of this application can be directly inserted into existing delivery needle hubs, avoiding significant structural alterations. The reduction of paste residue and waste can be achieved simply by adding the connector. The needle hub connector of this application can be installed on currently available conventional needle hubs, allowing for convenient and economical installation without altering the original needle hub structure. Attached Figure Description

[0021] Figure 1 A schematic cross-sectional view of a low-residue paste delivery device according to an embodiment;

[0022] Figure 2 for Figure 1 Exploded view;

[0023] Figure 3a This is a schematic diagram of the structure of the needle hub connector of a paste delivery device according to an embodiment;

[0024] Figure 3b This is a schematic diagram of the structure of the needle hub connector of a paste delivery device according to an embodiment;

[0025] Figure 3c This is a schematic diagram of the structure of the needle hub connector of a paste delivery device according to an embodiment;

[0026] Figure 3d This is a schematic diagram of the structure of the needle hub connector of a paste delivery device according to an embodiment;

[0027] Figure 3e This is a schematic diagram of the structure of the needle hub connector of a paste delivery device according to an embodiment;

[0028] Figure 3f This is a schematic diagram of the structure of the needle hub connector of a paste delivery device according to an embodiment;

[0029] Figure 3g This is a schematic diagram of the structure of the needle hub connector of a paste delivery device according to an embodiment;

[0030] Figure 3h This is a schematic diagram of the structure of the needle hub connector of a paste delivery device according to an embodiment;

[0031] Figure 3i This is a schematic diagram of the structure of the needle hub connector of a paste delivery device according to an embodiment;

[0032] Figure 4a This is a schematic diagram of the structure of a paste delivery device according to an embodiment, showing the needle hub connector installed on the delivery needle hub;

[0033] Figure 4b This is a schematic diagram of the structure of a paste delivery device according to an embodiment, showing the needle hub connector installed on the delivery needle hub;

[0034] Figure 4c This is a schematic diagram of the structure of a paste delivery device according to an embodiment, showing the needle hub connector installed on the delivery needle hub;

[0035] Figure 4d This is a schematic diagram of the structure of a paste delivery device according to an embodiment, showing the needle hub connector installed on the delivery needle hub;

[0036] Figure 4e This is a schematic diagram of the structure of a paste delivery device according to an embodiment, showing the needle hub connector installed on the delivery needle hub;

[0037] Figure 4f This is a schematic diagram of the structure of a paste delivery device in which the needle hub connector is installed on the delivery needle hub. Detailed Implementation

[0038] To facilitate understanding of this utility model and to make the aforementioned objects, features, and advantages of this utility model more apparent, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this utility model, and preferred embodiments of this utility model are shown in the accompanying drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model. This utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model; therefore, this utility model is not limited to the specific embodiments disclosed below. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. In the description of this utility model, "a number" means at least one, such as one, two, etc., unless otherwise explicitly specified. It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the utility model. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] This application provides a low-residue paste delivery device; please refer to [link / reference]. Figure 1 and Figure 2 The paste delivery device includes: 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 dispensing paste; the needle 3 has a paste dispensing cavity 31;

[0040] The needle delivery hub 1 includes a syringe mounting portion 11 and a needle mounting portion 12. The syringe mounting portion 11 has a syringe mounting cavity 111, and the syringe mounting portion 11 is mounted to the syringe 21 through the syringe mounting cavity 111. The needle mounting portion 12 has a needle mounting cavity 121, the relative inner diameter of which is smaller than the inner diameter of the syringe mounting cavity 111. The needle mounting cavity 121 communicates with the syringe mounting cavity 111. The syringe mounting cavity 111 is connected to the syringe 21. The needle 3 is inserted into and mounted in the needle mounting cavity 121. The first end of the needle 3 extends into the syringe mounting cavity 111, and the second end of the needle 3 extends out of the needle mounting cavity 111. A residual space 1111 is formed between the syringe 21, the side wall of the syringe mounting cavity 111, and the paste output cavity 31 of the needle 3. If this residual space is not treated, paste is easily left behind during paste delivery. This residual space can also be understood as the cavity gap formed between the syringe, the needle, and the delivery needle seat.

[0041] The needle hub connector 5 has a throttling cavity 54 that extends through the needle hub connector 5. The needle hub connector 5 fills the residual space 1111 and is connected to the needle 3 and the syringe 21 respectively. The paste output cavity 31 is connected to the syringe 21 through the throttling cavity 54.

[0042] The aforementioned low-residue paste delivery device, by providing a needle hub connector 5 and filling the residual space 1111 with the needle hub connector 5, allows the syringe 21 to directly connect to the paste output cavity 31 of the needle 3 through the throttling cavity 1111 of the needle hub connector 5. This reduces paste waste in the residual space and ensures that the paste is directly connected to the needle 3 through a relatively small throttling cavity 54, reducing paste residue waste between the needle hubs, thereby improving paste utilization and reducing treatment costs related to paste use. Moreover, the needle hub connector 5 of this application can be directly filled into existing delivery needle hubs, avoiding significant structural changes to existing delivery needle hubs. The problem of reducing paste residue and waste can be achieved simply by adding an additional needle hub connector.

[0043] In one embodiment, the delivery needle holder 1 is screwed onto the syringe 21. This allows for convenient and quick installation and disassembly. When the needle holder is connected to the syringe interface, the syringe interface contacts the needle holder connector. The syringe interface can either wrap around the outside of the connector or enter the hole and throttling chamber in the middle of the connector. For example, the syringe 21 has a delivery head 211 extending into the syringe mounting cavity 111, and the delivery head 211 abuts against the needle holder connector 5. For example, the delivery head extends into the throttling chamber, and the delivery head abuts against the side wall of the throttling chamber; this further reduces residue during paste delivery.

[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, paste residue can be further reduced.

[0045] In one embodiment, the central axes of the paste dispensing cavity 31, the throttling cavity 51, and the syringe 21 coincide. This facilitates rapid delivery of the paste and reduces residue.

[0046] Please see Figures 3a to 3i and Figures 4a to 4f The needle hub connectors (5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h, 5i) are used to install in the syringe mounting cavity 111 of the delivery needle hub 1. Each needle hub connector (5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h, 5i) includes a connector body. The connector body has opposing first and second abutment flat walls 51 and 52, both of which are straight walls. The connector body also has a connecting sidewall 53 connecting the first and second abutment flat walls 51 and 52. The first abutment flat wall 51 is located on the side of the needle tube adjacent to the needle tip, and the second abutment flat wall 52 is located on the side adjacent to the syringe barrel. The throttling cavity 54 of the connector body penetrates through the first and second abutment flat walls. By setting the first clamping flat wall 51 and the second clamping flat wall 52, it is convenient to install the needle hub connector into the syringe mounting cavity 111.

[0047] Please see Figures 3a to 3i and Figures 4a to 4f In this application, Figures 3a to 3i Specific examples of various pin connectors 5 are given. Figures 4a to 4f Several example schematic diagrams are provided showing the needle hub connector 5 installed on the delivery needle hub 1. For example, the needle hub connector has a cylindrical structure, a cylindrical structure with a platform, a slanted cylindrical structure, or a slanted cylindrical structure with a platform. For example, the connector body is cylindrical or has a platform. A cylindrical structure, such as... Figure 3f , Figure 3g In this case, the cylindrical structure with the platform is as follows: Figure 3c , Figure 3d , Figure 3e In this embodiment, the platform can also be understood as a disc-shaped portion. For example, the connector body is shaped like a slanted cylinder or a slanted cylinder with a platform. A slanted cylinder structure, such as... Figure 3a In such cases, a slanted cylindrical structure with a platform, such as Figure 3b , Figure 3c The situation.

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

[0049] In one embodiment, the needle hub connector has an injection-molded structure, an extrusion-molded structure, or a 3D-printed structure. That is, the needle hub connector of this application can be manufactured by injection molding, extrusion molding, or 3D printing.

[0050] In one embodiment, when the needle hub connector is installed in the residual space, a resin adhesive layer or a UV-cured adhesive layer is formed between the needle hub connector and the side wall of the syringe mounting cavity. For example, when the needle hub connector is installed in the residual space, the needle hub connector is mechanically secured to the syringe mounting cavity. That is, the needle hub connector can be processed separately from the needle hub and then assembled together; the connector and the needle hub can be combined by resin adhesive bonding, UV-cured adhesive bonding, or mechanical securing.

[0051] In one embodiment, the pin connector is made of a metallic or non-metallic material. The metallic material includes any one of nickel-titanium alloy, stainless steel, cobalt-chromium alloy, and titanium alloy; the non-metallic material includes any one of polypropylene, TPU, and resin materials.

[0052] The aforementioned low-residue paste delivery device, by incorporating a needle hub connector that fills the residual space, allows the syringe to directly connect to the paste delivery cavity of the needle via the throttling chamber of the connector. This reduces paste waste in the residual space, ensuring the paste connects directly to the needle through a relatively small throttling chamber, minimizing paste residue and waste between the needle hubs, thereby improving paste utilization and reducing treatment costs associated with paste use. Furthermore, the needle hub connector of this application can be directly incorporated into existing delivery needle hubs, avoiding significant structural alterations. The reduction of paste residue and waste can be achieved simply by adding the needle hub connector.

[0053] It should be noted that the low-residue paste delivery device provided in this application, which reduces residue and improves paste utilization, includes a needle hub and a delivery device, the delivery device including a syringe and a push rod. The needle hub connector of this application can be installed on conventional needle hubs currently on the market, thus adding the connector without changing the original needle hub structure, which is economical and convenient. When the needle hub connector and needle hub are processed separately and then assembled, the connector and needle hub can be combined by resin adhesive bonding, UV-cured adhesive bonding, or mechanical clamping. The needle hub with the connector can be manufactured by injection molding, extrusion molding, or 3D printing. The needle hub connector can be processed by injection molding, extrusion molding, 3D printing, or machining. The material of the needle hub connector can be metal or non-metal. Metal materials can be nickel-titanium alloy, stainless steel, cobalt-chromium alloy, titanium alloy, etc. Non-metal materials can be polypropylene, TPU, resin materials, etc. When the needle hub is connected to the syringe port, the syringe port contacts the needle hub connector. The syringe port can either surround the outside of the connector or enter the orifice and throttling chamber in the middle of the connector. When the syringe port of the delivery system is connected to the needle hub connector, the paste delivered from the delivery system can pass directly through the syringe port into the connector and then into the needle tube. This avoids paste residue remaining in the space between the needle hub and the syringe port, improving paste utilization.

[0054] Furthermore, regarding the syringe structure, this application also allows for the following: the needle hub adopts a traditional structure, meaning the inner cavity of the part connecting the needle hub and the syringe connector does not have a protrusion, i.e., the delivery head. By providing a delivery head, paste residue can be further reduced.

[0055] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. It should be noted that the terms "in one embodiment," "for example," and "again," etc., in this application are intended to illustrate the application and not to limit it. The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A low-residue paste delivery device, characterized in that, include: A delivery device having a syringe for dispensing a paste; The needle has a paste dispensing cavity; A delivery needle holder includes a syringe mounting portion and a needle mounting portion. The syringe mounting portion has a syringe mounting cavity and is mounted on the syringe through the syringe mounting cavity. The needle mounting portion has a needle mounting cavity, the relative inner diameter of which is smaller than the inner diameter of the syringe mounting cavity. The needle mounting cavity is connected to the syringe mounting cavity and communicates with the syringe through the syringe mounting cavity. The needle is inserted into and mounted in the needle mounting cavity, with a first end of the needle extending into the syringe mounting cavity and a second end of the needle extending out of the needle mounting cavity. A residual space is formed between the syringe, the sidewall of the syringe mounting cavity, and the paste output cavity of the needle. A needle hub connector has a throttling cavity extending through it. The needle hub connector fills the residual space and is connected to both the needle tip and the syringe. 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 pin 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 hub 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.

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

7. The low-residue paste delivery device according to claim 1, characterized in that, When the needle hub connector is installed in the residual space, the needle hub connector is mechanically secured to the syringe mounting cavity.

8. The low-residue paste delivery device according to claim 1, characterized in that, The delivery needle seat is screwed onto the syringe.

9. The low-residue paste delivery device according to claim 8, characterized in that, The syringe has a delivery head that extends into the syringe mounting cavity and abuts against the needle hub 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 abuts against the needle seat connector on the side wall of the throttling cavity.

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