JP2010287327A - Wire terminal plug with locking mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire terminal plug with a locking mechanism for preventing loosening of a cap from a plug body by providing a simple hooking structure where a hooking pin arranged at a flange provided in front of a threaded portion of the plug body enter a small hole provided near an opening end of the cap when screwing and fixing the cap on the plug body. <P>SOLUTION: The wire cord terminal plug includes a plug body A connected to a wire cord b, and a tubular cap C for screwing a wire cord connection point of the plug body A on a threaded portion d of the plug body A. A small hole 16 is provided near the opening end of the tubular cap C for screwing on a threaded portion b of the plug body A, and a retractable hooking pin arranged on the outer periphery of a flange 5 provided in front of the threaded portion b of the plug body A enters the small hole. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lead wire terminal plug with a locking mechanism that is widely used for electrical connection of various music equipment and the like.

  In general, when playing a musical instrument such as a guitar using a speaker, electrical connection is made by connecting a conductor terminal plug provided at both ends of the conductor cord between the instrument and the speaker (for example, Patent Documents). 1).

  Here, a representative example of the conventional example will be described with reference to FIG.

  In the figure, a is a plug body, b is a conductive wire cord connected to the plug body a, and c is a cylindrical cap that is screwed with a screw part d provided at the base of the plug body a.

  By the way, the plug main body a has a tubular tube portion 3 formed through the tip engaging portion 1 and the insulating ring 2, and a core rod 4 communicating with the tip engaging portion 1 is inserted into the tubular tube portion 3, The threaded portion d is formed by providing a flange portion 5 at the base portion of the tubular tube portion 3.

  Then, at the rear end of the screw part d, one terminal plate 7 provided with a clamping claw 6 for clamping the conductive wire cord b is provided, and the other terminal plate 9 is provided via an insulating plate 8 to provide a conductive wire. The two conductors 10 and 11 constituting the cord b are used by soldering.

  That is, one conductor 10 of the conductor cord b is electrically connected to the tip engaging portion 1, and the other conductor 11 is electrically connected to the tube portion 3. An insulating cylinder 12 such as rubber for preventing inadvertent contact between the two conductors 10 and 11 of the conductor cord b is interposed inside the cylindrical cap c.

  In the above-described configuration, the cylindrical cap c can be screwed to the screw portion d of the plug main body a, and the cylindrical cap c can be firmly screwed to the base of the plug main body a.

JP 2008-294475 A

  In the above-mentioned plugs, particularly musical instrument plugs, the tip engaging portion 1 of the plug main body a is connected to a musical instrument such as a guitar. However, when handled extremely violently and messyly, the screwed portion between the cap c and the screw portion d of the plug body a is loosened, resulting in a problem that the adhesion is impaired.

  If this state is overlooked, there is a disadvantage that noise is generated due to loosening of the cap during performance, and measures such as fixing the screw part d with an adhesive or the like may be taken, but repair of the disconnection of the conductor cord Can no longer be used, and there are problems such as being disposable.

  The present invention has been made paying attention to the above points. When screwing and fixing the plug body to the cap, a small hole is provided near the opening end of the cap and provided in front of the screw portion of the plug body. To provide a lead terminal plug with a locking mechanism that prevents a loosening of a tightening of a cap to a plug body by providing a simple locking structure that can be engaged with a locking pin disposed on a hook portion. With the goal.

  The present invention can solve the above problems by including the following configuration.

  (1) In a conductor cord terminal plug comprising a plug body connected to a conductor cord and a cylindrical cap capable of screwing and fixing a conductor cord connecting portion of the plug body to a screw portion of the plug body, the thread portion of the plug body A small hole is provided near the open end of the cylindrical cap that can be screwed into the plug body so that a retractable locking pin disposed on the outer periphery of the collar portion provided in front of the screw portion of the plug body can be engaged. A lead wire terminal plug with a locking mechanism, characterized by comprising:

  (2) The locking pin is characterized in that a cylindrical body containing a hooked pin and a coil spring that presses the hooked pin is embedded in a recess formed in the peripheral surface of the flange of the plug body. The lead terminal plug with a locking mechanism according to (1).

  According to the present invention, the small hole is provided near the opening end of the cylindrical cap that can be screwed into the threaded portion of the plug body, and the engagement is provided on the outer periphery of the flange portion provided in front of the threaded portion of the plug body. Since the structure that can be engaged with the stop pin is provided, the small hole of the cylindrical cap engages with the lock pin in the screwing process, and is locked and the tightened state is ensured.

  Therefore, even if a guitar or other instrument on the other end of the conductor cord connected to the plug body is vibrated vigorously, there is no risk that the cap will loosen from the plug body via the conductor cord. Can do.

  Also, in the unlikely event that the connection state with the conductor cord becomes defective, or when the connection with another conductor cord is exchanged, etc., the latch pin facing the small hole is pressed to engage with the small hole. And the cap can be removed from the plug body by twisting the screwed state with the threaded portion in the opposite direction.

  Further, since the locking pin can be moved into and out of the small hole, when engaging with the cap, the locking pin continues to be screwed while pressing the locking pin at the open end, and the one-end locking pin is engaged with the small hole. After entering and locking, the cap cannot be loosened even if it is twisted in the opposite direction, so that the locked state is maintained and it does not come off without unnaturally loosening.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway side view of a lead wire terminal plug with a locking mechanism showing an embodiment of the present invention, where (a) shows a case where the plug body and the cap are not screwed, and (b) shows a case where the plug body and the cap are screwed. The case of time is shown. Note that (b) is a partial enlarged sectional view in a circle. Sectional drawing which shows one Example of the locking pin arrange | positioned on the outer periphery of the collar part of a plug main body It is a side view which shows a part which shows the typical example of a prior art example in a cross section, (a) at the time of non-screwing of a plug main body and a cap, (b) at the time of a screwing process, (c) at the time of screwing tightening

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to examples.

  In each figure, A is a plug body, 13 is a small recess provided on the outer periphery of the flange portion 5 of the base, and the other parts constituting the plug body A are the same as those of the conventional example, and are denoted by the same reference numerals. The detailed explanation is omitted.

  Reference numeral C denotes a cylindrical cap coupled to the plug main body A, and reference numeral 14 denotes a locking pin mounted in the small recess 13 of the plug main body A, and an opening of the cylindrical cap C. It can be locked by engaging with a small hole 16 formed near the end 15.

  By the way, as shown in FIG. 2, the locking pin 14 has a cylindrical body 19 having a spherical end α and a flange portion 17 at the base end, and an opening 18 for locking with the flange portion 17. The cylindrical body 19 is inserted into the small recess portion 13 of the plug main body A or is screwed and locked therein.

  Due to the locking of the cylindrical body 19 into the small recess 13, the pin projecting from the opening 18 of the cylindrical body 19 due to the spring elasticity of the coil spring 20 exhibits a function of allowing it to appear and disappear elastically.

  Since it becomes the above structure, when the cap C is screwed into the threaded portion b to the plug body A and tightening is started and the final stage is reached, the open end 15 of the cap C reaches the outer periphery of the flange portion 5. The spherical shape α of the locking pin 14 is pushed down against the coil spring 20, and finally the locking pin 14 is pushed up into the small hole 16 near the opening end 15 to obtain the elastic force of the coil spring 20 and quickly engage. Then, it is locked to the hook.

  Once engaged, the locking pin 14 secures the engaged state in the small hole 16, so there is no possibility of causing unnatural loosening or disengagement in the normal state.

  When it is necessary to remove, the locking pin 14 facing the small hole 16 is pressed against the coil spring 20 and the head of the spherical surface α is pushed down using a tool or the like to disengage the cap C in the opposite direction. And can be removed by loosening the tightening with the screw portion b.

  In this way, the cap C that can be connected to the connecting portion of the conductor cord with the conductor cord connected to the plug body does not loosen unnaturally once engaged. Even if there is intense vibration, there is no possibility that the cap C will come off the plug body A.

α Spherical shape A, a Plug body b Conductor cord C, c Cap d Screw part 1 Tip engagement part 2 Insulating ring 3 Tube tube part 4 Core collar 5 Gutter part 6 Claw claw 7, 9 Terminal board 8 Insulating board 10, 11 Conductor 12 Insulating cylinder 13 Small recess 14 Locking pin 15 Open end 16 Small hole 17 Gutter 18 Opening 19 Cylindrical body 20 Coil spring

Claims (2)

  In a conductor cord terminal plug consisting of a plug body connected to a conductor cord and a cylindrical cap that can be screwed and fixed to the threaded portion of the plug body, the conductor cord connection portion of the plug body is screwed into the threaded portion of the plug body A small hole is provided near the opening end of the cylindrical cap that can be formed, and a retractable locking pin disposed on the outer periphery of the flange portion provided in front of the screw portion of the plug body can be engaged. Lead wire terminal plug with loosening prevention feature.   The locking pin is formed by embedding a cylindrical body having a hooked pin and a coil spring that presses the hooked pin in a recess formed in the peripheral surface of the flange of the plug body. The lead terminal plug with a locking mechanism according to claim 1.

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