A syringe for dispensing a dental composite material

Abstract

The utility model provides a syringe for dispensing dental composite material, including syringe and push cap. Syringe inside is equipped with plunger, and plunger is screwed into the inside of injection cavity through thread cooperation. Push cap is located in the inside of injection cavity, is equipped with force chamber and push surface on push cap, and is connected with the limiting piece on the syringe to prevent push cap from being pushed out. The limiting piece is sleeved with the cap. The plunger is screwed into the syringe from one end, and then is pushed into the push cap and screwed into the limiting piece from the other end, and the push cap covers the top end of the plunger. The composite material is loaded into the syringe through the channel opening in the limiting piece, and after loading is completed, the cap is sleeved on the limiting piece. The limiting piece structure of the utility model can effectively prevent the push cap from being pushed out, and through the thread cooperation between the plunger and the inner wall of the syringe, the syringe can realize accurate material dispensing.

Description

Technical Field

[0001] This invention relates to the field of syringes, and in particular to a syringe for dispensing dental composite materials. Background Technology

[0002] In dental treatment, dental composite materials are widely used for tooth restoration and filling. However, traditional syringe designs have limitations in facilitating precise and hygienic injection of these materials into the affected tooth, particularly in the effective distribution of the material. Traditional dental syringes typically employ manual pushing, which can lead to material leakage, inaccurate injection, and inconvenience. Common defects in existing designs include the inability to achieve accurate pressure control within the injection chamber, insufficiently secure connection between the plunger and the plunger cap, and ineffective designs to prevent the plunger cap from being ejected.

[0003] For example, Chinese patent document CN110418657B discloses a dental safety syringe, including a barrel assembly and a plunger assembly with a mating configuration that slidably engages with the barrel assembly; the barrel assembly further includes: a reusable barrel having a longitudinally extending window and a protruding lug; and a removable syringe inserted into the barrel through the window; and the mating plunger assembly further includes: a plunger body having open proximal and distal ends, an outer surface and a groove provided on the outer surface, and a plunger rod having proximal and distal ends and slidably inserted into the plunger body; this patent does not demonstrate the ability to accurately control the pressure of the plunger; therefore, we have designed a syringe for dispensing dental composite materials. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The problem to be solved by this invention is to provide a syringe for dispensing dental composite materials, thereby overcoming the deficiencies in the prior art.

[0006] (II) Technical Solution

[0007] To solve the aforementioned technical problem, this utility model provides a syringe for dispensing dental composite materials, comprising a syringe barrel and a push cap. The syringe barrel contains a plunger; the syringe barrel has an injection chamber, and the plunger is screwed into the injection chamber via a threaded connection; the push cap is disposed inside the injection chamber; a limiting member is connected to the syringe barrel to prevent the push cap from being ejected, and a protective cap is fitted onto the limiting member; during syringe assembly, the plunger is screwed into the syringe barrel from one end, and the push cap is pushed into the syringe barrel from the other end and screwed into the limiting member, with the push cap covering the top of the plunger. After the composite material is loaded into the syringe barrel, the protective cap is then fitted onto the limiting member.

[0008] This solution includes an injection barrel, a plunger, a push cap, a limiting component, and a protective cap. The injection barrel has an injection chamber, and the plunger engages with the injection chamber via threads. The push cap is located within the injection chamber and is prevented from being ejected by the limiting component. When the plunger is rotated and screwed into the injection chamber, the push cap is simultaneously pushed. The amount of composite material to be extruded can be controlled by rotating the threads. The syringe assembly process includes screwing the plunger into one end of the injection barrel, then pushing the push cap in and screwing it into the limiting component. After the composite material is loaded into the injection barrel, the protective cap is finally placed on the limiting component.

[0009] In some embodiments, the push cap is cylindrical in shape, and has a force-receiving surface and a pushing surface. The force-receiving cavity is fitted onto one end of the plunger, and the pushing surface is in contact with the composite material.

[0010] In this design, one end of the push cap is fitted onto the plunger, and the pushing surface contacts the composite material, which can effectively transmit the thrust and allow the filling material to be smoothly discharged through the syringe port.

[0011] In some embodiments, the limiting member is provided with a channel opening, and the channel opening is provided with a first blocking rib for preventing the push cap from being pushed out.

[0012] In some embodiments, the outer side of the injection cylinder is provided with a first external thread, and the inner wall of the limiting member is provided with a first internal thread that mates with the first external thread.

[0013] In this solution, the limiting member can be securely connected to the injection cylinder by the engagement of the first external thread on the outside of the injection cylinder and the first internal thread on the inner wall of the limiting member.

[0014] In some embodiments, the plunger is provided with a first lug and a second external thread, and the inner wall of the injection cylinder is provided with a second internal thread that matches the second external thread. Through the cooperation of the second external thread and the second internal thread, the plunger moves within the injection cavity.

[0015] In this design, the first lug on the plunger facilitates rotation of the plunger as a whole, and the engagement of the second external thread and the second internal thread allows the plunger to move within the injection cavity, thereby facilitating the adjustment of the filling material distribution.

[0016] In some embodiments, the cap is engaged with the limiting member by a second blocking rib provided inside to prevent the cap from falling off, and the cap is also provided with a second lug on the outside to facilitate the user to remove the cap.

[0017] In some embodiments, the syringe is provided with a third lug, and when the plunger is rotated, the user can hold the syringe more stably by pinching the third lug with his hand.

[0018] In some embodiments, the syringe is an unsealed cylindrical structure.

[0019] (III) Beneficial Effects

[0020] This utility model provides a syringe for dispensing dental composite materials. Through a threaded connection between the plunger and the syringe barrel, the user can precisely control the injection volume of the composite material according to their needs. The push cap has a force-receiving cavity and a pushing surface, which can evenly distribute pressure, allowing the composite material to be pushed more smoothly out of the injection cavity. The limiting member has a first blocking rib to effectively prevent the push cap from being pushed out of the injection cavity during use. The protective cap has a second lug for easy removal by the user. The first external thread on the outside of the syringe barrel engages with the first internal thread on the inner wall of the limiting member, allowing the limiting member to be firmly installed on the syringe barrel, avoiding unnecessary loosening during injection. This syringe is simple to operate. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is an exploded view of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of this utility model;

[0024] Figure 3 This is a cross-sectional view of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the plunger and push cap assembly of this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the limiting component of this utility model;

[0027] Figure 6 This is a schematic diagram of the push cap structure of this utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the protective cap of this utility model;

[0029] The component names corresponding to the various labels in the figure are as follows: 1. Injector; 2. Plunger; 3. Injection chamber; 4. Limiting component; 5. Protective cap; 6. Third lug; 7. Push cap; 701. Force-receiving chamber; 702. Pushing surface; 401. Channel opening; 402. First blocking rib; 101. First external thread; 403. First internal thread; 203. First lug; 204. Second external thread; 102. Second internal thread; 501. Second blocking rib; 502. Second lug. Detailed Implementation

[0030] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0031] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0033] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0034] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0035] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0036] See Figures 1 to 7 This utility model provides a syringe for dispensing dental composite materials, including a syringe barrel 1 and a push cap 7. The syringe barrel 1 is provided with a plunger 2. The syringe barrel 1 has an injection cavity 3. The plunger 2 is screwed into the injection cavity 3 through a threaded fit. The push cap 7 is disposed inside the injection cavity 3. A limiting member 4 is connected to the syringe barrel 1 to prevent the push cap 7 from being pushed out. A protective cap 5 is sleeved on the limiting member 4.

[0037] When assembling the syringe, screw the plunger 2 into one end of the syringe barrel 1, push the plunger cap 7 into the other end of the syringe barrel 1 and screw in the limiting member 4. The plunger cap 7 covers the top of the plunger 2. After filling the syringe barrel 1 with composite material, put the protective cap 5 on the limiting member 4.

[0038] When using the syringe, remove the protective cap 5 from the limiting member 4, and rotate the plunger 2 to push the push cap 7 into the channel opening 401. The pushing surface 702 of the push cap 7 is in direct contact with the composite material and pushes the composite material into the channel opening 401. The user can control the rotation depth of the plunger 2 according to the usage requirements.

[0039] In some embodiments, such as Figure 1 As shown, the push cap 7 is designed as an integral cylinder, and has two key parts: a force-receiving cavity 701 and a pressing surface 702. The force-receiving cavity 701 is fitted onto one end of the plunger 2 and can effectively withstand the thrust applied by the plunger 2 during operation; the pressing surface 702 is the area in direct contact with the composite material, and during use, the pressure applied to the composite material by the pressing surface 702 evenly pushes the composite material out of the injection cylinder 1.

[0040] In some embodiments, such as Figure 2 As shown, the limiting member 4 has a channel opening 401 through which the composite material is discharged. To ensure that the push cap 7 is not pushed out during use, the limiting member 4 is provided with a first blocking rib 402 to prevent the push cap 7 from being accidentally pushed out during the injection process.

[0041] In some embodiments, such as Figure 3 As shown, the outer side of the syringe 1 is provided with a first external thread 101, and the inner wall of the limiting member 4 is provided with a first internal thread 403 that mates with the first external thread 101. During assembly, the user can connect the limiting member 4 to the syringe 1 by rotating it, so that the limiting member 4 is securely fixed to the end of the syringe 1.

[0042] In some embodiments, such as Figure 2 As shown, the plunger 2 is provided with a first lug 203 and a second external thread 204. The plunger 2 engages with the second internal thread 102 on the inner wall of the injection cylinder 1 through the second external thread 204. The matching of the second external thread 204 and the second internal thread 102 allows the plunger 2 to move within the injection chamber 3 as needed by the user. The first lug 203 can be used to apply appropriate force during manual operation, making the movement of the plunger 2 smoother, thereby achieving effective distribution of the composite material.

[0043] In some embodiments, such as Figure 5 As shown, the protective cap 5 is engaged with the limiting member 4 by a second blocking rib 501 provided inside. The second blocking rib 501 can tightly fit the limiting member 4 to prevent the protective cap 5 from being accidentally detached during use. In order to facilitate the user to remove the protective cap 5 during use, the protective cap 5 is also provided with a second lug 502 on the outside. The user can easily pull off the protective cap 5 through the second lug 502. The protective cap 5 can not only protect the internal materials from leakage, but also facilitate quick removal when needed.

[0044] In some embodiments, such as Figure 1 As shown, the syringe 1 is provided with a third lug 6.

[0045] In some embodiments, such as Figure 1 As shown, the syringe 1 is an unsealed cylindrical structure.

[0046] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0047] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A syringe for dispensing dental composite materials, comprising a syringe barrel (1) and a pusher cap (7), characterized in that: The syringe (1) is provided with a plunger (2); the syringe (1) is provided with an injection cavity (3), and the plunger (2) is screwed into the injection cavity (3) through a threaded fit; the push cap (7) is provided inside the injection cavity (3), and the push cap (7) is provided with a force-receiving cavity (701) and a pushing surface (702); the syringe (1) is connected with a limiting member (4) to prevent the push cap (7) from being pushed out, the limiting member (4) is provided with a channel opening (401), and a protective cap (5) is fitted on the limiting member (4); When assembling the syringe, screw the plunger (2) into one end of the syringe (1) and push the push cap (7) into the other end of the syringe (1). Screw in the limiting member (4), and the push cap (7) covers the top of the plunger (2). After filling the syringe (1) with composite material, put the protective cap (5) on the limiting member (4).

2. The syringe for dispensing dental composite materials as described in claim 1, characterized in that: The push cap (7) is cylindrical in shape, the force-receiving cavity (701) is sleeved on one end of the plunger (2), and the pushing surface (702) is in contact with the composite material.

3. The syringe for dispensing dental composite materials as described in claim 1, characterized in that: The channel opening (401) is provided with a first blocking rib (402) to prevent the push cap (7) from being pushed out.

4. The syringe for dispensing dental composite materials as described in claim 1, characterized in that: The injection cylinder (1) has a first external thread (101) on its outer side, and the limiting member (4) has a first internal thread (403) on its inner wall that mates with the first external thread (101).

5. The syringe for dispensing dental composite materials as described in claim 1, characterized in that: The plunger (2) is provided with a first lug (203) and a second external thread (204). The inner wall of the injection cylinder (1) is provided with a second internal thread (102) that matches the second external thread (204). Through the cooperation of the second external thread (204) and the second internal thread (102), the plunger (2) moves in the injection cavity (3).

6. The syringe for dispensing dental composite materials as described in claim 1, characterized in that: The cap (5) is engaged with the limiting member (4) by the second blocking rib (501) provided inside, and the cap (5) is also provided with a second lug (502) on the outside to facilitate the user to remove the cap (5).

7. The syringe for dispensing dental composite materials as claimed in claim 1, characterized in that: The syringe (1) is provided with a third lug (6).

8. The syringe for dispensing dental composite materials as claimed in claim 1, characterized in that: The injection cylinder (1) has an unsealed cylindrical structure.

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