JPH0572068U - Mating lock structure for TV receiver connector - Google Patents

Abstract

(57) [Summary] [Purpose] The fitting of the male and female parts is reliably prevented from coming off. [Structure] The grounding metal fitting 21 is provided with a spring piece 23 formed continuously by cutting and raising to the outside along the inserting / removing direction of the mating connector plug, and when the mating mating plug and the grounding metal fitting are in a fitted state, Lock claw 2 with the tip of the spring piece bent inward
4 is hooked on the male screw portion on the outer circumference of the mating connector to maintain the fitted state.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fitting lock structure of a connector for a television receiver for connecting a 300Ω feeder line or a 75Ω coaxial cable.

[0002]

[Prior Art]

 The conventional fitting structure of this type of connector has been to simply fit the male and female parts by strengthening the holding force.

[0003]

[Problems to be solved by the device]

 However, such conventional connector mating has a drawback in that even though the holding force is strengthened, the male and female parts are simply mated, and therefore pulling out causes the mating to come off. Was there. An object of the present invention is to provide a fitting lock structure for a connector for a television receiver, which does not come off by simply pulling.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention comprises an output coaxial connector having a center conductor assembled to an insulating base and a grounding metal fitting, and the base metal fitting is fitted to the male screw portion on the outer periphery of the mating connector. In the fitting lock structure of the TV receiver connector to be connected by connecting the spring fitting to the grounding fitting, a spring piece is continuously formed along the insertion direction of the mating connector plug and raised outward. It is characterized in that the front end is bent inward, and when the mating plug and the grounding fitting are in a fitted state, a lock claw is provided for catching on the male screw portion and maintaining the fitted state.

[0005]

[Action]

 In the fitting lock structure of the connector for the television receiver according to the present invention, the grounding metal fitting is provided with the spring piece formed by continuously cutting and raising the mating fitting along the inserting / removing direction of the mating mating plug, and When is engaged, the lock claw formed by bending the tip of the spring piece inward is hooked on the external thread on the outer circumference of the mating connector to maintain the engaged state, so it can be pulled out simply by pulling. It does not come off.

[0006]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings by taking a two-input matching connector capable of selecting two types of input lines having different characteristic impedances as an example. FIG. 1 is a side sectional view showing a main part of a two-input matching connector according to a first embodiment of the present invention, and FIG. 2 is a side sectional view showing a state in which a grounding metal fitting and a mating connector are fitted and locked, FIG. 3 is a rear view showing a state in which the grounding fitting and the mating connector are fitted together. In the fitting lock structure of the matching connector according to the present embodiment, the grounding metal fitting 21 assembled to the insulating base body 4 of the lower insulating case 1 is continuously connected in the insertion / removal direction of the mating connector plug 10 and is cut and raised outward. The lock claw 24 is provided with the formed spring piece 23, and the tip of the spring piece 23 is bent inward when the grounding metal fitting 21 is fitted to the outer circumference of the mating connector 10. Since the tip of the plug enters the thread groove of the male screw portion 11 on the outer periphery of the mating connector 10 and catches the fitting state, it does not come off even if only a tensile force is applied.

The matching connector has a lower insulating case 1 and an upper insulating case 7 that closes the upper opening 1 a of the lower insulating case 1, and these are joined to each other at a joint 6 and assembled to the lower insulating case 1. An output coaxial connector 20 and an earth clamp 18 which is connected to an earth fitting 21 of the output coaxial connector 20 and which has a holding portion 18a and an earth terminal 18b to which the outer conductor of the coaxial cable 12 is held and connected. , A center conductor contact 13 into which the center conductor of the coaxial cable 12 is fitted and connected.

Further, the matching connector is provided with a feeder line connecting terminal 14 on one end side of the lower insulating case 1, and the feeder line connecting terminal 14 and the grounding metal fitting 21 of the output coaxial connector 20 are balanced. A balun transformer 15 used for matching the unbalanced conversion impedance is connected and arranged. The balun transformer 15 is provided with a terminal plate 16 which is connected to the core wire 15a side and to which the contact spring portion 13a of the central conductor contact 13 comes in and out. The ground wire 15b of the balance transformer 15 is connected to the ground terminal 18b. The slider 17 which is slidable in the vertical direction and which is attached to the lower insulating case 1 and biased upward by the compression spring 19 descends, and the protrusion 17a provided integrally with the slider 17 is interposed between the slider 17 and the terminal board 16. When intervening, the contact spring portion 13a separates from the terminal plate 16 and comes into contact with the terminal plate 16 when the slider 17 moves up.

The lower insulating case 1 integrally includes a cylindrical portion 3 formed in a protruding shape and having an external thread 3a engraved on the outer periphery thereof, and an insulating base 4 arranged in the inner portion of the cylindrical portion 3, and has a cylindrical inner periphery. A claw pressing member 30 having a female screw 31a screwed onto the male screw 3a of the portion 3 is screwed to the cylindrical portion 3.

The output coaxial connector 20 includes a grounding metal fitting 21 and a central conductor 29 arranged concentrically with the grounding metal fitting 21, and is fitted to the inner circumference of the cylindrical portion 3 to assemble the grounding metal fitting 21 and penetrate the insulating base 4. Then, the central conductor 29 is prevented from coming off and assembled. The grounding metal fitting 21 has a spring piece 23 formed by notching the cylindrical portion 22 along the insertion / removal direction of the mating contact plug 10 and raising it to the outside. The insulating base member 4 is provided at two locations on one end side of the cylindrical portion 22. A ground terminal 27 (see FIG. 2) is formed so as to penetrate therethrough, and the ground terminal 27 is fixed to the lower insulating case 1 at a position not shown.

The spring piece 23 is continuous from the base portion 23 a at a position near the tip of the grounding metal fitting 21 along the fitting direction of the mating connector 10, and has a lock claw 24 in which the tip is bent inward. In this state, when the tip of the lock claw 24 is outside the inner surface of the grounding metal fitting 21 and the mating connector 10 and the grounding metal fitting 21 are in a fitted state, the claw pressing member 30 is rotated as described later. When the male screw 3a of the cylindrical portion 3 and the female screw 31a are screwed together, the cut and raised slope 23b and the outer protruding portion 24a are pressed and the tip of the lock pawl 24 enters the screw groove of the male screw portion 11 and is caught. To hold.

The claw pressing member 30 includes a collar portion 31 having an internal thread 31a on the inner circumference, and a cylindrical body 32 having no internal thread on the inner circumference and having an inner diameter smaller than that of the female thread 31a and larger than the outer diameter of the grounding fitting 21. A claw pressing inner surface 33 having a tapered hole shape is provided on the inner surface of the boundary portion between the collar portion 31 and the cylindrical body 32 integrally, and the claw pressing inner surface 33 is a spring at the position where the female screw 31a starts to be screwed into the male screw 3a. It almost coincides with the position of the cut and raised slope 23b of the piece 23, and when screwing is advanced from this position to the position shown by the chain double-dashed line, the pawl pressing inner surface 33 moves the lock pawl 24 of the spring piece 23 from the outside. When the tip of the lock claw 24 is pushed into the thread groove of the male screw part 11 on the outer circumference of the mating connector 10, and is returned to the position of the solid line, the tip of the lock claw 24 of the spring piece 23 is screwed with the screw of the male screw part 11. To come off the groove There is.

In such an alignment connector, after the mating contact plug 10 is inserted into the inner circumference of the grounding metal fitting 21 and brought into a fitted state, the pawl pressing member 30 is rotated to advance the screwing of the male screw portion 11 and the female screw 31a. When the claw pressing member 30 is moved to the position indicated by the chain double-dashed line in FIG. 1, the tip of the lock claw 24 enters the thread groove of the male screw portion 11 of the mating connector 10 as shown in FIG. State is retained. When it is desired to release this fitting state, the pawl pressing member 30 is turned in the opposite direction and returned to the position shown by the solid line in FIG. 1 so that the tip of the lock pawl 24 is disengaged from the thread groove of the male screw portion 11. Later, the mating connector can be pulled to release the mated condition.

When the 75Ω coaxial cable 12 is connected to the television receiver, the outer conductor of the coaxial cable 12 is connected to the sandwiching portion 18a and the center conductor 12a is connected to the center conductor contact 13, and at the same time the slider 17 is connected. By lowering the protrusion 17a between the contact spring portion 13a and the terminal plate 16 and separating the contact spring portion 13a from the terminal plate 16, the core side of the 300Ω system feeder wire and the output coaxial connector 2 are connected. The connection with the center conductor 29 of 0 is cut off. As a result, only the central conductor 12a on the coaxial cable 12 side is connected to the central conductor 29 of the output coaxial connector 20 through the central conductor contact 13.

When connecting the 300Ω feeder line to the television receiver, the coaxial cable 12 is removed from the center conductor contact 13 and the earth clamp 18, and at the same time, the slider 17 is returned to the raised position as shown in FIG. Then, the protrusion 17a is disengaged from between the contact spring portion 13a and the terminal plate 16, the contact spring portion 13a contacts the terminal plate 16, and the core wire 15a side of the balun transformer 15 is inserted through the terminal plate 16 and the center conductor contact 13. It is connected to the center conductor 29 of the output coaxial connector 20.

FIG. 4 is a side sectional view showing a state in which a grounding metal fitting according to a second embodiment of the present invention is fitted to the outer periphery of the mating connector plug, and is the same as the first embodiment. The same reference numerals are attached. The spring piece 23 of the earth metal fitting 21 is located at a position where the tip of the lock claw 24 enters the thread groove of the male screw portion 11 of the mating connector 10 in a free state, and is further bent and extended outward at the tip of the lock claw 24. The third embodiment is different from the first embodiment in that the claw pressing member 30 is unnecessary because the lock releasing piece 25 is provided. In this case, when the mating connector 10 is inserted into the cylindrical portion 22 of the grounding metal fitting 21, the spring piece 23 is elastically deflected and the tip of the lock claw 24 is threaded as the male screw portion 11 moves toward the inner side. The thread groove and the screw thread of the portion 11 are sequentially brought into contact with each other, and they can be advanced straight along the common axis of the grounding metal fitting 21 and the mating connector plug 10 into a fitted state. The fitting state can be released by applying an outward force to the lock release piece 25 to bend the spring piece 23, pulling the alignment connector with the lock claw 24 removed from the male screw portion 11.

FIG. 5 is a side sectional view showing an essential part of a connector according to a third embodiment of the present invention. In the case of this embodiment, the spring pieces 23 of the earth metal fitting 21 are symmetrically arranged on both sides of the cylindrical portion 22, and the claw pressing member 30 is slidably fitted to the outer periphery of the cylindrical portion 22 and the claw pressing member concerned. When 30 is slid in the direction indicated by the arrow P and moved to the position indicated by the chain double-dashed line to the left, the tapered tapered pawl pressing inner surface 33 begins to press the lock pawl 24 of the spring piece 23 from the outside, and further to the right. To the position indicated by the chain double-dashed line, and the tip of the locking claw 24 is inserted into the thread groove of the male screw part 11 on the outer periphery of the mating connector 10 to be fitted and locked, and the claw pressing member 30 is returned to the position indicated by the solid line. As a result, the tip of the locking claw 24 of the spring piece 23 can be removed from the thread groove of the male screw portion 11.

FIG. 6 is a side sectional view showing an essential part of a connector according to a fourth embodiment of the present invention. In this case, the spring piece 23 of the grounding metal fitting 21 is continuous from the base portion 23a at the intermediate position of the grounding metal fitting 21 in the withdrawing direction of the mating connector 10, contrary to the first to fourth embodiments. Corresponding to, the claw pressing inner surface 33 of the claw pressing member 30 has a taper shape which is divergent, and when the claw pressing member 30 is slid in the direction indicated by the arrow Q and moved to the position indicated by the chain double-dashed line. The diverging tapered claw pressing inner surface 33 presses the lock claw 24 of the spring piece 23 from the outside so that the tip of the lock claw 24 is inserted into the thread groove of the male screw portion 11 on the outer circumference of the mating connector 10. By returning the pressing member 30 to the position indicated by the solid line, the tip of the lock claw 24 of the spring piece 23 can be removed from the thread groove of the male screw portion 11.

The present invention is not limited to the above embodiment, and can be applied not only to a 2-input matching connector but also to a connector for exclusive use of a 300Ω feeder line or a connector for exclusive use of a 75Ω coaxial cable. Can be provided at three or more locations on the grounding metal fitting 21, and various modifications can be made without departing from the scope of the invention.

[0020]

[Effect of the device]

 As described above, the mating lock structure of the connector according to the present invention is provided with the spring piece formed on the grounding metal fitting by continuously cutting and raising it along the insertion / removal direction of the mating connector plug. When the metal fittings are fitted together, the lock claw formed by bending the tip of the spring piece inward is caught by the male thread on the outer circumference of the mating connector, and the mated condition is maintained. In that case, the remarkable effect of not falling out can be obtained.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a main part of a matching connector according to a first embodiment of the present invention.

FIG. 2 is a side sectional view showing a state in which the grounding metal and the mating connector according to the first embodiment of the present invention are fitted and locked.

FIG. 3 is a rear view of the grounding fitting and the mating connector according to the first embodiment of the present invention in a fitted state.

FIG. 4 is a side sectional view showing a fitted state of a grounding metal fitting and a mating connector of a connector according to a second embodiment of the present invention.

FIG. 5 is a side sectional view showing an essential part of a connector according to a third embodiment of the present invention.

FIG. 6 is a side sectional view showing an essential part of a connector according to a fourth embodiment of the present invention.

[Explanation of symbols]

 1 Lower Insulation Case 3 Cylindrical Part 3a Male Screw 4 Insulating Base 7 Upper Insulation Case 10 Counterpart Plug 11 Male Thread Part 20 Output Coaxial Plug 21 Grounding Metal Fitting 22 Cylindrical Part 23 Spring Piece 23a Base Part 23b Cut-and-raised Slope 24 Lock Claw 24a Outer Projection Part 25 unlocking piece 27 ground terminal 29 center conductor 30 claw pressing member 31a female screw 32 cylindrical body 33 claw pressing inner surface

Claims (1)

[Scope of utility model registration request] 1. A connector for a television receiver, comprising an output coaxial connector having a central conductor assembled to an insulating base and a grounding metal fitting, wherein the grounding metal fitting is fitted to a male screw portion on the outer periphery of the mating connector. In the fitting lock structure, the earth metal fitting is provided with a spring piece which is formed continuously and outwardly along the insertion / extraction direction of the mating contact plug, and the tip of the spring piece is bent inward to form the mating piece. A fitting lock structure for a connector for a television receiver, comprising a lock claw that is hooked on the male screw portion and holds the fitted state when the plug and the grounding fitting are fitted.