An oval-shaped combination cap anti-loosening device

Abstract

This utility model relates to the field of anti-loosening technology and discloses an elliptical combination cap anti-loosening device, including a lock cylinder and a lock sleeve. The bottom end of the lock cylinder is connected to the lock sleeve through a connecting component. The connecting component includes an external thread and an internal thread. The external thread is located on the outer periphery of the lock cylinder, and the internal thread is located in the inner cavity of the lock sleeve. Both the lock cylinder and the lock sleeve are elliptical. By setting both the lock cylinder and the lock sleeve to be elliptical, when the lock cylinder and the lock sleeve are connected together and the syringe cone is inserted into the lock sleeve, the cap fits snugly against the syringe cone. When the syringe cone pushes the cap, causing the lock cylinder to spring back, a large locking torque can be provided through the overlapping position of the major and minor axes, preventing loosening and falling off, increasing the sealing performance between the cap and the syringe cone, and solving the problem of reduced sealing effect in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of anti-loosening technology, and in particular to an oval-shaped combination cap anti-loosening device. Background Technology

[0002] The locking sleeve on the syringe tip, commonly known as a Luer locking cap, is a safety device used for pre-filled syringes. In addition, there are hard and soft needle caps and end caps specifically designed for syringe tips. These accessories are also used to improve the safety and protection of syringes.

[0003] In the prior art, a sealing element is provided inside the lock sleeve. The sealing element is pressed against the syringe cone to play a sealing role. If the locking force between the lock cylinder and the lock sleeve is insufficient, the syringe cone will push the sealing element open, reducing the sealing effect. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the prior art by proposing an oval-shaped combined cap anti-loosening device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An elliptical combination cap anti-loosening device includes a lock cylinder and a lock sleeve. The bottom end of the lock cylinder is connected to the lock sleeve through a connecting component. The connecting component includes an external thread and an internal thread. The external thread is disposed on the outer periphery of the lock cylinder, and the internal thread is disposed in the inner cavity of the lock sleeve. Both the lock cylinder and the lock sleeve are elliptical in shape. The inner cavity of the lock cylinder is provided with a protective cap through a snap-fit ​​component.

[0007] Preferably, the locking assembly includes a first locking block and a second locking block, a groove is provided on one side of the cap, the first locking block is disposed in the inner cavity of the lock cylinder, the second locking block is disposed in the inner cavity of the groove, and the bottom of the first locking block is movable against the bottom of the inner cavity of the groove.

[0008] Preferably, the inner sides of both the first and second card blocks are provided with inclined surfaces, and the two inclined surfaces are adapted to each other.

[0009] Preferably, the cap is made of rubber.

[0010] Preferably, the lock cylinder and lock sleeve are made of plastic.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention, through the design of a lock cylinder and a lock sleeve, allows the lock cylinder and lock sleeve to be connected together during use. When the lock cylinder is rotated to connect the internal and external threads, the position of the lock cylinder and lock sleeve is precisely within a certain angle (10-30 degrees, adjustable) after the major and minor axes overlap when tightening. At the position where the major and minor axes overlap, the rotational torque is the greatest. Compared with the prior art, this device, by setting both the lock cylinder and lock sleeve to be elliptical, ensures that when the syringe cone is inserted into the lock sleeve after the lock cylinder and lock sleeve are connected, the protective cap fits snugly against the syringe cone. When the syringe cone pushes the protective cap, causing the lock cylinder to spring back, the overlapping position of the major and minor axes provides a large locking torque, preventing loosening and falling off, increasing the sealing between the protective cap and the syringe cone, and solving the problem of reduced sealing effect in the prior art. Attached Figure Description

[0013] Figure 1 This is a cross-sectional schematic diagram of an elliptical combined cap anti-loosening device proposed in this utility model;

[0014] Figure 2 This is a side view of the lock cylinder and lock sleeve of an elliptical combined cap anti-loosening device proposed in this utility model.

[0015] In the diagram: 1. Lock cylinder; 2. Lock sleeve; 3. External thread; 4. Internal thread; 5. Groove; 6. Inclined surface; 7. Protective cap; 8. First locking block; 9. Second locking block. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Reference Figure 1 and Figure 2 An elliptical combination cap anti-loosening device includes a lock cylinder 1 and a lock sleeve 2. The bottom end of the lock cylinder 1 is connected to the lock sleeve 2 through a connecting component. The connecting component includes an external thread 3 and an internal thread 4. The external thread 3 is disposed on the outer periphery of the lock cylinder 1, and the internal thread 4 is disposed in the inner cavity of the lock sleeve 2. Both the lock cylinder 1 and the lock sleeve 2 are elliptical in shape. The inner cavity of the lock cylinder 1 is provided with a protective cap 7 through a snap-fit ​​component.

[0018] In use, this device connects the lock cylinder 1 and the lock sleeve 2 together. When the lock cylinder 1 is rotated to connect the internal thread 4 and the external thread 3, the lock cylinder 1 and lock sleeve 2 are positioned precisely within a certain angle (10-30 degrees, adjustable) after the major and minor axes overlap. The rotational torque is maximized at this overlap position. Compared to existing technologies, this device, by setting both the lock cylinder 1 and lock sleeve 2 to an elliptical shape, ensures that when the syringe cone is inserted into the lock sleeve 2 after connecting the lock cylinder 1 and lock sleeve 2, the protective cap 7 fits against the syringe cone. When the syringe cone pushes the protective cap 7, causing the lock cylinder 1 to spring back, the overlap position of the major and minor axes provides a larger locking torque, preventing loosening and detachment, increasing the sealing between the protective cap 7 and the syringe cone, and solving the problem of reduced sealing effect in existing technologies.

[0019] Furthermore, the snap-fit ​​assembly includes a first snap-fit ​​block 8 and a second snap-fit ​​block 9. A groove 5 is provided on one side of the protective cap 7. The first snap-fit ​​block 8 is disposed in the inner cavity of the lock cylinder 1, and the second snap-fit ​​block 9 is disposed in the inner cavity of the groove 5. The bottom of the first snap-fit ​​block 8 is in contact with the bottom of the inner cavity of the groove 5. With the first snap-fit ​​block 8 and the second snap-fit ​​block 9, when the protective cap 7 is installed in the lock cylinder 1, the protective cap 7 can be squeezed under the first snap-fit ​​block 8. The bottom of the first snap-fit ​​block 8 is in contact with the bottom of the inner cavity of the groove 5, which prevents the protective cap 7 from being squeezed and causing the lock cylinder 1 to separate from the lock sleeve 2 when the injection cone is inserted into the lock sleeve 2, thereby reducing the sealing performance of the protective cap 7 on the injection cone.

[0020] Furthermore, the inner sides of the first locking block 8 and the second locking block 9 are both provided with inclined surfaces 6, and the two inclined surfaces 6 are adapted to each other. By providing inclined surfaces 6, the friction between the first locking block 8 and the second locking block 9 can be increased, preventing the first locking block 8 and the second locking block 9 from separating and reducing the sealing performance of the cap 7 on the injection cone.

[0021] Furthermore, the cap 7 is made of rubber. By making the cap 7 of rubber, the cap 7 has a certain degree of flexibility and can fit better.

[0022] Furthermore, the lock cylinder 1 and lock sleeve 2 are made of plastic. By making the lock cylinder 1 and lock sleeve 2 of rigid plastic, the lock cylinder 1 and lock sleeve 2 have a certain degree of elasticity. When the lock cylinder 1 and lock sleeve 2 rotate relative to each other, the elasticity of the plastic material itself allows the lock cylinder 1 to forcefully pass through the intersection of their major and minor axes.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An oval-shaped combination cap anti-loosening device, comprising a lock cylinder (1) and a lock sleeve (2), characterized in that: The bottom end of the lock cylinder (1) is connected to the lock sleeve (2) through a connecting component. The connecting component includes an external thread (3) and an internal thread (4). The external thread (3) is located on the outer periphery of the lock cylinder (1), and the internal thread (4) is located in the inner cavity of the lock sleeve (2). Both the lock cylinder (1) and the lock sleeve (2) are elliptical. The inner cavity of the lock cylinder (1) is provided with a protective cap (7) through a snap-fit ​​component.

2. The oval-shaped combined cap anti-loosening device according to claim 1, characterized in that: The latching assembly includes a first latching block (8) and a second latching block (9). A groove (5) is provided on one side of the cap (7). The first latching block (8) is located in the inner cavity of the lock cylinder (1), and the second latching block (9) is located in the inner cavity of the groove (5). The bottom of the first latching block (8) moves against the bottom of the inner cavity of the groove (5).

3. The oval-shaped combined cap anti-loosening device according to claim 2, characterized in that: The inner sides of the first card block (8) and the second card block (9) are provided with inclined surfaces (6), and the two inclined surfaces (6) are adapted to each other.

4. The oval-shaped combined cap anti-loosening device according to claim 1, characterized in that: The protective cap (7) is made of rubber.

5. The oval-shaped combined cap anti-loosening device according to claim 1, characterized in that: The lock cylinder (1) and lock sleeve (2) are made of plastic.

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