Anti-tightening tail plug

Abstract

The anti-tightening tail plug comprises a tail plug body, an external thread section matched with an internal thread on an inner cavity of a fishing rod is arranged on the periphery of the tail plug body, an inner cavity sealing gasket for sealing the inner cavity of the tail plug body is arranged at the front end of the tail plug body, and a screwing cover for controlling the tail plug body to rotate is arranged at the rear end of the tail plug body. And a force release mechanism for preventing excessive tightening is arranged between the tail plug main body and the screwing cover. The tail plug body in threaded fit with the fishing rod is tightened through the tightening cover, the force relief mechanism is arranged between the tightening cover and the tail plug body, and when tightening force exceeds the limit, the force relief mechanism plays a protection role, so that the tightening cover cannot drive the tail plug body to rotate, excessive tightening is prevented, and a screw thread is protected against damage; and the inner cavity sealing gasket covers the front end of the tail plug main body and the anti-tightening O-shaped ring, so that a buffering effect can be achieved, and damage to screw threads is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of fishing gear, specifically relating to anti-tightening tail plugs. Background Technology

[0002] Fishing rods are fitted with end caps to prevent foreign objects such as dust, sand, and water from entering the rod. This prevents these substances from corroding, wearing down, or clogging the guide rings, thus extending the rod's lifespan. The end cap installed at the rear of the rod is called a tail cap. The tail cap is usually connected to the rod via a detachable structure such as threads, and is used to seal the rear of the rod to prevent the rod sections from protruding. When tightening the tail cap, it's easy to overtighten it, making it difficult to separate from the rod during disassembly, and may even damage the connecting threads. Utility Model Content

[0003] The purpose of this invention is to overcome the defect of over-tightening the tail plug in the prior art and to provide a tail plug that is prevented from being over-tightened.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0005] An anti-tightening tail plug includes a tail plug body, the outer periphery of which is provided with an external thread section that mates with the internal thread on the inner cavity of the fishing rod, the front end of which is provided with an inner cavity sealing gasket that seals the inner cavity of the tail plug body, and the rear end of which is provided with a screwing cap that controls the rotation of the tail plug body. A stress relief mechanism is provided between the tail plug body and the screwing cap to prevent over-tightening.

[0006] As a preferred embodiment, the pressure relief mechanism includes a positioning tooth A connected to the end of the elastic arm on the upper end face of the tail plug body and a positioning tooth disc on the lower end face of the screwing cover. The positioning tooth disc is composed of a plurality of positioning teeth B arranged in a circular array. The positioning tooth A has a positioning inclined surface A and a positioning straight surface A, and the positioning tooth B has a positioning inclined surface B and a positioning straight surface B. In the tightening direction of the tail plug body, the positioning straight surface B cooperates with the positioning inclined surface A, and in the loosening direction, the positioning inclined surface B cooperates with the positioning straight surface A.

[0007] As a preferred embodiment, the pressure relief mechanism includes a limiting hole provided on the inner wall of the tail plug body and a limiting block provided on the screwing cover. The limiting block has a limiting straight surface and a limiting inclined surface. In the tightening direction of the tail plug body, the limiting inclined surface engages with the limiting hole, and in the loosening direction, the limiting straight surface engages with the limiting hole.

[0008] More preferably, the outer end face of the inner cavity sealing gasket covers the front end of the tail plug body.

[0009] More preferably, the inner cavity sealing gasket is made of an elastic material.

[0010] More preferably, an anti-tightening O-ring is provided between the screw cap and the tail plug body.

[0011] More preferably, the screw cap and the inner cavity sealing gasket are provided with vent holes.

[0012] More preferably, the inner wall of the tail plug body is provided with positioning protrusions, and the inner cavity sealing gasket is provided with positioning grooves that cooperate with the positioning protrusions.

[0013] The beneficial effects of this utility model are: (1) By tightening the end cap and the tail plug body that is threaded with the fishing rod, a stress relief mechanism is set between the tightening cap and the tail plug body. When the tightening force exceeds the limit, the stress relief mechanism plays a protective role, so that the tightening cap cannot drive the tail plug body to rotate, preventing over-tightening and protecting the threads from damage; (2) The inner cavity sealing gasket covering the front end of the tail plug body and the anti-tightening O-ring can play a buffering role and reduce damage to the threads. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0015] Figure 1 and Figure 2 This is a schematic diagram of the overall structure of the anti-tightening tail plug;

[0016] Figure 3 This is a schematic diagram of a fishing rod plug with the inner sealing gasket omitted;

[0017] Figure 4 This is a schematic diagram of the screw-on cap structure;

[0018] Figure 5 This is a schematic diagram of the main structure of the tail plug;

[0019] Figure 6 This is a schematic diagram of the internal cavity sealing gasket structure;

[0020] Figure 7 This is a cross-sectional view of the anti-tightening tail plug in Example 1;

[0021] Figure 8 This is a cross-sectional view of the anti-tightening tail plug in Example 2;

[0022] In the diagram, 1 is the screw cap, 11 is the positioning toothed disc, 12 is the positioning tooth B, 121 is the positioning inclined surface B, 122 is the positioning straight surface B, 13 is the limiting block, 2 is the tail plug body, 21 is the external thread section, 22 is the elastic arm, 23 is the positioning tooth A, 231 is the positioning inclined surface A, 232 is the positioning straight surface A, 24 is the limiting hole, 25 is the positioning ridge, 3 is the inner cavity sealing gasket, 31 is the outer end face of the inner cavity sealing gasket, 32 is the positioning groove, 4 is the vent hole, and 5 is the anti-tightening O-ring. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Example 1

[0025] See Figures 1-7 This utility model discloses an anti-tightening tail plug, comprising a tail plug body 2. The outer periphery of the tail plug body 2 is provided with an external thread section 21 that mates with the internal thread on the inner cavity of the fishing rod. An inner cavity sealing gasket 3 is provided at the front end to seal the inner cavity of the tail plug body 2, and a rotating cover 1 is provided at the rear end to control the rotation of the tail plug body 2. A pressure relief mechanism is provided between the tail plug body 2 and the rotating cover 1 to prevent over-tightening. In this embodiment, the pressure relief mechanism includes a positioning tooth A23 connected to the end of an elastic arm 22 on the upper end face of the tail plug body 2 and a positioning tooth disk 11 on the lower end face of the rotating cover 1. The positioning tooth disk 11 is composed of a plurality of positioning teeth B12 arranged in a circular array. The positioning tooth A23 has a positioning inclined surface A231 and a positioning straight surface A232, and the positioning tooth B12 has a positioning inclined surface B121 and a positioning straight surface B122. In the tightening direction of the tail plug body 2, the positioning straight surface B122 mates with the positioning inclined surface A231, and in the loosening direction, the positioning inclined surface B121 mates with the positioning straight surface A232. The diagram illustrates the situation where the tail plug body 2 is tightened onto the fishing rod when the screw cap 1 is turned clockwise. The positioning surface B122 of the positioning tooth B12 on the screw cap 1 engages with the positioning inclined surface A231 of the positioning tooth A23, causing the tail plug body 2 to rotate. When the tail plug body 2 is tightened onto the fishing rod, the force applied by the screw cap 1 exceeds a certain range. The positioning tooth B12 acts on the positioning tooth A23, causing the elastic arm 22 to move downward. The force exerted by the positioning tooth B12 on the positioning tooth A23 decreases and can no longer drive the tail plug body 2 to rotate, thus achieving the purpose of releasing force. When the screw cap 1 is turned counterclockwise, the positioning inclined surface B121 engages with the positioning surface A232, driving the tail plug body 2 to rotate in the opposite direction, loosening the tail plug.

[0026] In this embodiment, the outer end face 31 of the inner cavity sealing gasket covers the front end of the tail plug body 2. The inner cavity sealing gasket 3 is made of elastic material. The inner cavity sealing gasket 3 can provide shock absorption and protection for the tail plug body, preventing the threads from misaligning when the fishing rod section hits the tail plug body 2.

[0027] In this embodiment, an anti-tightening O-ring 5 is provided between the screw cap 1 and the tail plug body 2. The anti-tightening O-ring 5 has a certain shock absorption effect and prevents the threads from being twisted too tightly without any gap.

[0028] In this embodiment, the screw cap 1 and the inner cavity sealing gasket 3 are provided with vent holes 4. Vent holes 4 can expel gas from the fishing rod.

[0029] In this embodiment, a positioning protrusion 25 is provided on the inner wall of the tail plug body 2, and a positioning groove 32 that mates with the positioning protrusion 25 is provided on the inner cavity sealing gasket 3. The engagement of the positioning protrusion 25 and the positioning groove 32 enables rapid assembly between the inner cavity sealing gasket 3 and the tail plug body 2, and increases the connection strength between the two.

[0030] Example 2

[0031] like Figure 8 As shown, the force relief mechanism in this embodiment differs from that in Embodiment 1. The force relief mechanism includes a limiting hole 24 on the inner wall of the tail plug body 2 and a limiting block 13 on the rotating cover 1. The limiting block 13 has a limiting straight surface and a limiting inclined surface (not shown in the figure, but refer to the positioning inclined surface B121 and the positioning straight surface B122). In the tightening direction of the tail plug body 2, the limiting inclined surface engages with the limiting hole 24; in the loosening direction, the limiting straight surface engages with the limiting hole 24. When the force applied to the rotating cover 1 exceeds a certain range, the limiting inclined surface disengages from the limiting hole 24, preventing the tail plug body 2 from rotating, thus achieving the force relief purpose.

[0032] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A tamper-evident tail plug comprising a tail plug body, characterised in that: The tail plug body is provided with an outer thread segment matched with an inner thread of the inner cavity of the fishing rod on the outer periphery of the tail plug body, a cavity sealing gasket for sealing the inner cavity of the tail plug body is arranged at the front end of the tail plug body, and a screwing cap for controlling rotation of the tail plug body is arranged at the rear end of the tail plug body.

2. The anti-twist tail plug of claim 1, wherein: The relief mechanism comprises positioning teeth A connected with the ends of the elastic arms and arranged on the upper end surface of the tail plug body and a positioning tooth disc arranged on the lower end surface of the screwing cap, the positioning tooth disc is arranged in an annular array of a plurality of positioning teeth B, the positioning teeth A have positioning inclined surfaces A and positioning straight surfaces A, the positioning teeth B have positioning inclined surfaces B and positioning straight surfaces B, the positioning straight surfaces B are matched with the positioning inclined surfaces A in the tightening direction of the tail plug body, and the positioning inclined surfaces B are matched with the positioning straight surfaces A in the loosening direction.

3. The anti-twist tail plug of claim 1, wherein: The relief mechanism comprises limiting holes arranged on the inner wall of the tail plug body and limiting blocks arranged on the screwing cap, the limiting blocks have limiting straight surfaces and limiting inclined surfaces, the limiting inclined surfaces are matched with the limiting holes in the tightening direction of the tail plug body, and the limiting straight surfaces are matched with the limiting holes in the loosening direction.

4. A tamper-evident plug as claimed in any one of claims 1 to 3, characterised in that: The outer end surface of the cavity sealing gasket covers the front end of the tail plug body.

5. A twist-resistant tail plug according to claim 4, wherein: The cavity sealing gasket is made of an elastic material.

6. A tamper-evident plug as claimed in any one of claims 1 to 3, wherein: An anti-tightening O-shaped ring is arranged between the screwing cap and the tail plug body.

7. A tamper-evident plug as claimed in any one of claims 1 to 3, wherein: Exhaust holes are arranged on the screwing cap and the cavity sealing gasket.

8. A tamper-evident plug as claimed in any one of claims 1 to 3, wherein: A positioning convex rib is arranged on the inner wall of the tail plug body, and a positioning groove matched with the positioning convex rib is arranged on the cavity sealing gasket.

Images