Catheter seat structure of remaining needle and mold of catheter seat structure

Abstract

The utility model relates to the field of medical instruments, in particular to a catheter base structure of an indwelling needle and a mold of the catheter base structure. The catheter seat structure comprises a main guide seat, a branch guide seat and an isolation plug, the branch guide seat is obliquely arranged on one side of the main guide seat and communicated with the middle of the main guide seat, glue injection holes are not formed in the peripheral side of the main guide seat, a groove is formed in the inner side of the main guide seat, a clamping ring is arranged in the groove, and the clamping ring is used for abutting against the rear end of the isolation plug and limiting the isolation plug. The clamping ring is a circular ring body with a notch, and the clamping ring is pressed in from the rear end of the main guide seat and is in interference fit with the groove. The utility model further provides a die for producing the conduit seat structure. The utility model has the advantages that under the condition that the product quality is not reduced, the production quantity of each mold cycle is improved; more conduit seats can be simultaneously produced by using a mold with a smaller volume, so that the overall manufacturing cost is reduced; the requirement for manufacturing a guide pipe seat glue injection hole is eliminated, the design of a mold is simplified, and the initial design and manufacturing difficulty of the mold is reduced.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a catheter seat structure of an indwelling needle and a mold thereof. Background Art

[0002] An indwelling needle is a device commonly used in the medical industry to maintain venous access for a long time. The existing indwelling needle includes a catheter seat, which is designed with an isolation plug to prevent blood reflux and bacterial invasion when the indwelling needle is not in use. In order to ensure the stability of the isolation plug, the catheter seat in the prior art is often designed with a glue injection hole. Adhesive is injected into the catheter seat through the glue injection hole, and the isolation plug and the catheter seat are firmly combined.

[0003] In the prior art, in order to produce such a catheter seat, a mold structure is usually used to achieve injection molding, so as to form a glue injection hole on the circumference of the catheter seat. The mold usually has a parting line designed on the horizontal section of the horizontal catheter seat, see Figure 1 This design allows the necessary injection holes to be created on the side of the catheter hub during the injection molding process. Figure 2 As shown, a set of standard size molds can only produce 8 catheter seats at the same time in the same production cycle. Utility Model Content

[0004] The purpose of the utility model is to provide a new indwelling needle catheter seat structure and a mold for producing the catheter seat, which is committed to improving the fixing method of the isolation plug, avoiding the formation of injection holes on the peripheral side of the catheter seat, and can significantly reduce the volume of the required mold, increase the number of catheter seats produced in each mold cycle, thereby improving production efficiency and reducing production costs

[0005] In order to achieve the above-mentioned purpose, a catheter seat structure for an indwelling needle is designed, including a main seat, a support seat and an isolation plug. The support seat is tilted at one side of the main seat and is connected with the middle part of the main seat. No injection holes are provided on the circumferential side of the main seat. A groove is provided on the inner side of the main seat, and a clamping ring is provided in the groove. The clamping ring is used to abut against the rear end of the isolation plug to limit the isolation plug. The clamping ring is a circular ring with a notch. The clamping ring is pressed in from the rear end of the main seat and has an interference fit with the groove.

[0006] Preferably, the groove of the utility model is opened on the inner side of the main seat and close to the rear part of the main seat.

[0007] Preferably, the main seat of the utility model is provided with a cavity narrowing toward the front end, an isolation plug is provided in the cavity, and a clamping ring limits the rear end of the isolation plug.

[0008] The utility model also provides a mold for producing the catheter seat, the mold includes a movable mold and a fixed mold, the parting line between the movable mold and the fixed mold is: starting from the bottom center of the main seat, extending along the center line of its longitudinal axis; at the same time, starting from the bottom center of the support guide seat, extending along the center line of its longitudinal axis; the line formed by the intersection of the two extension paths is the dividing line when the movable mold and the fixed mold are molded together; the parting line is a cross-sectional contour line formed by the intersection of the vertical center axes of the main seat and the support guide seat.

[0009] Compared with the prior art, the utility model has the following advantages:

[0010] 1. Improve production efficiency: The utility model can significantly increase the production quantity of each mold cycle without reducing product quality.

[0011] 2. Reduce production costs: Since a smaller mold can be used to produce more catheter seats at the same time, mold costs, maintenance costs and production costs can be effectively reduced, thereby reducing overall manufacturing costs while maintaining product quality.

[0012] 3. Optimization of mold design: It eliminates the need to make injection holes for the catheter seat and simplifies the design of the mold. It reduces the difficulty of initial design and manufacturing of the mold, reduces mold wear, and extends the service life of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 , schematic diagram of the prior art mold;

[0014] Figure 2 , a top view of batch production of existing molds;

[0015] Figure 3 , a schematic diagram of the structure of the catheter seat of the utility model;

[0016] Figure 4 , a front view of the clamping ring structure in the catheter seat of the utility model;

[0017] Figure 5 , a top view of the batch production of the utility model mold;

[0018] Figure 6 , schematic diagram of the mold of the utility model.

[0019] Among them: 1 main seat; 2 support guide seat; 3 isolation plug; 4 groove; 5 clamp ring; 6 needle seat; 6.1 metal wedge; 6.2 catheter; 6.3 needle tube; 6.4 water stop clamp; 6.5 extension tube; 6.6 hose seat; 6.7 end cap; 6.8 heparin cap; 6.9 protective cover; 7 movable mold; 7.1 fixed mold; 7.2 parting line on main seat; 7.3 parting line on support guide seat; 8 prior art left concave mold; 8.1 prior art right concave mold; 8.2 mold reserved for glue injection hole; 8.3 prior art mold parting line. DETAILED DESCRIPTION

[0020] In order to make the purpose, principle and structure of the utility model clearer, it is further described below in conjunction with the drawings and specific embodiments.

[0021] Embodiment 1:

[0022] See also Figure 3 The present embodiment provides a catheter seat structure for an indwelling needle, comprising a main seat 1, a supporting seat 2 and an isolation plug 3. The supporting seat 2 is obliquely arranged on one side of the main seat 1 and communicated with the middle of the main seat 1. No injection hole is provided on the side of the main seat 1. A groove 4 is provided on the inner side of the main seat 1. A clamping ring 5 is provided in the groove 4. The clamping ring 5 is used to abut against the rear end of the isolation plug 3 to limit the isolation plug 3. Figure 4 The collar 5 is a circular ring with a notch. The collar 5 is pressed in from the rear end of the main seat 1 and has an interference fit with the groove 4. The groove 4 is opened inside the main seat 1 and close to the rear of the main seat. The main seat 1 is provided with a cavity narrowing toward the front end, and the cavity is provided with an isolation plug 3. The collar 5 limits the rear end of the isolation plug 3.

[0023] The specific assembly method of the catheter seat is:

[0024] A metal wedge 6.1 is provided at the front end of the main seat 1, and an isolation plug 3 filler is placed in the cavity behind the metal wedge 6.1. The clamping ring 5 is pressed into the rear part of the main seat 1, and the clamping ring 5 is continuously pressed in to deform it until the gap of the clamping ring 5 is eliminated under the deformation extrusion. At this time, the clamping ring 5 and the main seat form an interference fit seal.

[0025] At this time, the needle seat 6 is inserted from the rear end of the main seat 1, and the needle tube on the needle seat passes through the interference fit collar 5, the isolation plug 3, the middle hole of the metal wedge 6.1, and the catheter 6.2 in sequence. The front end of the catheter 6.2 is also provided with a needle tube 6.3 and a protective sleeve 6.9. The rear end of the supporting seat 2 is connected to the extension tube 6.5, and the extension tube 6.5 is provided with a water stop clamp 6.4. The end of the extension tube is connected to the hose seat 6.6 with an end cap 6.7 and a heparin cap 6.8.

[0026] Embodiment 2:

[0027] See also Figure 6, a mold for producing the catheter seat is also provided, and the mold includes a movable mold 7 and a fixed mold 7.1. A plurality of cavities matching the shape of the vertically arranged catheter seat are provided at the joint of the movable mold 7 and the fixed mold 7.1. The parting line 7.2 between the movable mold 7 and the fixed mold 7.1 is designed to start from the bottom center of the main seat 1 and extend along the center line in the longitudinal direction thereof; at the same time, start from the bottom center of the support guide seat 2 and extend along the center line in the longitudinal direction thereof; the line formed by the intersection of the extension paths of the two is the dividing line when the movable mold 7 and the fixed mold 7.1 are molded together; the parting line is a cross-sectional contour line formed by the intersection of the vertical center axes of the main seat and the support guide seat. The parting line 7.2 on the main seat and the parting line 7.3 on the support guide seat are as shown Figure 6 shown.

[0028] It is worth mentioning that:

[0029] See also Figure 1 In the prior art, a glue injection hole is provided on the peripheral side of the catheter seat main seat, and glue is injected into the catheter seat to limit and seal the isolation plug. Since a glue injection hole needs to be reserved during the production process, a mold reserved glue injection hole 8.2 needs to be set in the mold, and in order to match the mold reserved glue injection hole 8.2, the mold needs to be set to open a left concave mold 8 and a right concave mold 8.1 symmetrically. Multiple concave molds are horizontally arranged in the mold during batch production, which wastes production space, and only 8 can be produced in one batch. See Figure 2 .

[0030] See also Figure 5 , Figure 6 Since the catheter seat of the present application does not need to be provided with a glue injection through hole on the circumferential side and does not need to be reserved for glue injection through holes, the movable mold 7 and the concave mold of the fixed mold 7.1 can be vertically arranged in the production equipment, which can greatly reduce the space required for production. A batch can produce 36 pieces without the need for high-precision control, and the yield rate is greatly improved, thereby reducing the production cost.

[0031] The above is only a specific implementation method of this utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the utility model, according to the technical solution and new concept of the utility model, shall be covered by the protection scope of the utility model.

Claims

1. A catheter seat structure for an indwelling needle, comprising a main seat, a supporting seat and an isolation plug, wherein the supporting seat is obliquely arranged on one side of the main seat and communicated with the middle part of the main seat, characterized in that There is no glue injection hole on the circumferential side of the main seat, and a groove is provided on the inner side of the main seat. A clamping ring is provided in the groove, and the clamping ring is used to abut against the rear end of the isolation plug to limit the isolation plug; the clamping ring is a circular ring with a notch, and the clamping ring is pressed in from the rear end of the main seat and has an interference fit with the groove.

2. The catheter seat structure of the indwelling needle as claimed in claim 1, characterized in that The groove is arranged on the inner side of the main seat and close to the rear part of the main seat.

3. The catheter seat structure of the indwelling needle as claimed in claim 1, characterized in that The main seat is provided with a cavity narrowing toward the front end, the cavity is provided with an isolation plug, and the clamping ring limits the rear end of the isolation plug.

4. A mold for producing a catheter seat structure as claimed in any one of claims 1 to 3, characterized in that The mold includes a movable mold and a fixed mold. The parting line between the movable mold and the fixed mold is: starting from the bottom center of the main seat and extending along the center line of its longitudinal axis; at the same time, starting from the bottom center of the supporting guide seat and extending along the center line of its longitudinal axis; the line formed by the intersection of the two extension paths is the dividing line when the movable mold and the fixed mold are molded together; the parting line is a cross-sectional contour line formed by the intersection of the vertical center axes of the main seat and the supporting guide seat.

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