JP2981121B2 - Jack sleeve mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a sleeve for a jack, which is mounted on a cylindrical sleeve to be a plug connecting portion of a jack for decoration.

[0002]

2. Description of the Related Art Conventionally, as a mounting structure of a sleeve fitting of this type, for example, as shown in FIGS. 7 and 8, a structure in which a sleeve fitting 30 is crimped to a jack housing 31 and fixed is known. Have been. That is, the cylindrical portion 32 of the sleeve fitting 30 is formed to be longer, and the tip thereof is used as a crimping portion 32a. After the crimping portion 32a is inserted into the plug insertion hole 33 of the jack housing 31, the crimping portion 32a is formed using a predetermined jig. Then, it is configured to be attached to the jack housing 31 by expanding outward.

However, this mounting structure requires a separate caulking jig, and further requires a caulking operation in the jack housing 31, so that the workability is poor.

In addition, although not shown, a fixing structure in which a sleeve rib is provided on the sleeve fitting 30 and which is pressed into and fixed to the plug insertion hole 33 is also known. Therefore, when the plug is pulled out at an angle, the plug is subjected to a so-called twisting action, and the sleeve fitting 30 is removed.
Had the problem of dropping out.

The applicant of the present invention has devised a mounting structure of a sleeve fitting shown in FIGS.
Application for registration of utility model No. 564

In this mounting structure of the sleeve fitting, the sleeve fitting 40 has legs 42 projecting from four locations on the outer peripheral edge of the ring-shaped portion 41, and has a generally inverted crown shape as a whole.

On the other hand, mounting grooves 44 concentric with the cylindrical sleeve 43 are recessed from the front surface of the cylindrical sleeve 43 of the jack housing 47, and are provided at four locations at 90-degree intervals along the circumferential direction of the mounting groove 44. A locking recess 45 is formed in the mounting groove 44 at the position.

As shown in FIG. 10, when the legs 42 of the sleeve fitting 40 are fitted into the locking recesses 45 in the mounting grooves 44, the retaining claws 46 formed on both side edges of the legs 42 are locked. The sleeve fitting 40 is locked to the inner surface of the concave portion 45, and is fixed to the jack housing 47 so as not to come off.

According to this mounting structure, the sleeve fitting 40
Is not mounted along the plug insertion hole, so that strict dimensional accuracy is not required, and since it does not come into direct contact with the plug, the jack housing 4
There is no drop off from 7.

[0010]

The fixing operation of the sleeve fitting 40 is manually performed. After the leg 42 is rotated so as to coincide with the locking concave portion 45, the ring-shaped portion 41 is pressed. The leg 42 is pressed into the locking recess 45.

However, in a situation where the locking recess 45 cannot be hidden and visually confirmed by the sleeve fitting 40, it is extremely difficult to correct the position of the locking recess 45 while rotating the sleeve fitting 40, and the workability is poor. Depending on the positions of the portion 42 and the locking recess 45, as shown in FIG.
There is a problem that the tip comes into contact with the upper surface of the protrusion 48 between the locking recesses 45.

Further, if the ring-shaped portion 41 is forcibly pressed in the state shown in FIG. 11, the leg 42 is deformed.

Therefore, the sleeve fitting 40 is pressed into the mounting groove 44 by using a jig having a positioning function by rotation. However, it is necessary to use a dedicated jig, and the structure of the jig is complicated. And it is expensive.

The present invention has been made to solve the above problems, and does not require strict dimensional accuracy of the sleeve fitting, does not fall out of the jack housing even by the twisting action from the plug, and furthermore, has the sleeve An object of the present invention is to provide a mounting structure for a jack sleeve metal fitting which can easily fix the metal fitting and does not require a special jig.

[0015]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems. According to the first aspect of the present invention, the cylindrical sleeve of the jack housing is concentric with the cylindrical sleeve from the front. The upper mounting groove is recessed, a plurality of legs are protruded from the ring-shaped portion of the sleeve fitting attached to the cylindrical sleeve, and the retaining claws of the legs are locked to the inner surface of the mounting groove, and the sleeve fitting is formed. In the mounting structure of the jack sleeve fitting for fixing the to the front of the cylindrical sleeve,
The legs of the sleeve fitting are arranged at regular intervals along the ring-shaped portion, and a plurality of positioning projections are protruded at regular intervals along the mounting groove from the inner bottom surface of the mounting groove, and at least the tip of the positioning projection is formed. An inclined guide surface is formed on one side surface, and the leg portion is guided by the inclined guide surface into the locking concave portion between the positioning protrusions, and the retaining claw is locked to the inner surface of the locking concave portion. .

The invention according to claim 2 is characterized in that the number of positioning projections is an integral multiple of the number of legs of the sleeve fitting.

Furthermore, the invention of claim 3 is characterized in that at least one leg of the sleeve fitting is a positioning leg protruding from the other leg.

Further, according to a fourth aspect of the present invention, the tip of the positioning leg is formed in a substantially arrowhead shape having tapered surfaces on both sides, and the other legs except the positioning leg are formed in a ring shape with a substantially arrowhead-shaped intermediate portion. It is characterized by being formed by cutting parallel to the part.

[0019]

According to the first aspect of the present invention, when the ring-shaped portion of the sleeve is pressed, the leg of the sleeve is guided into the locking recess along the inclined guide surface formed at the tip of the positioning projection. Is done. When the leg is inserted into the locking recess, the retaining claw of the leg locks to the inner surface of the locking recess.

The legs are projected at regular intervals along the ring-shaped portion, and the positioning projections are also projected at regular intervals along the mounting groove, so that one leg is formed on the inclined guide surface. When guided along the inside of the locking recess, the other legs are also guided into the locking recess at the same time, and the retaining claws of each leg are locked to the inner surface in the locking recess.

Therefore, even when the sleeve is not rotated and aligned with the locking recess, the sleeve is guided to the locking position, and the leg is deformed while being in contact with the positioning projection between the locking recesses. Absent.

According to the second aspect of the present invention, since the number of positioning projections is an integral multiple of the number of legs of the sleeve, the probability that the legs are located on the locking recesses between the positioning projections is increased. Even when it is located on the positioning protrusion, the moving distance guided by the inclined guide surface is shortened, and the sleeve fitting can be more easily positioned at the locking position.

According to the third aspect of the present invention, since at least one positioning leg of the sleeve fitting protrudes from the other leg, the positioning leg contacts the inclined guide surface before the other leg. When the positioning leg is guided to the locking recess,
At the same time, the other leg is also positioned on the locking recess, and the sleeve fitting is positioned at the locking position. Therefore, it is not necessary to position all the legs by the inclined guide surface.

According to the fourth aspect of the present invention, the distal end of the positioning leg is formed in a substantially arrowhead shape having tapered surfaces on both sides, and the other leg except the positioning leg is formed in a substantially arrowhead-shaped intermediate portion with a ring-shaped portion. Since the legs are cut in parallel, the positioning legs and the other legs can be formed only by molding the legs having the same shape and cutting a part of the legs.

Further, since the substantially arrowhead-shaped intermediate portion is cut in parallel with the ring-shaped portion, the cut leg portion is also provided with a tapered surface acting as a retaining claw.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a side view of a sleeve fitting and a partially broken jack according to the first embodiment, FIG. 2 is a sectional view of FIG. 1, and FIG. 3 is a front view and a view of a cylindrical sleeve of the jack. 4
(A), (b), (c), and (d) are a front view, a side view, a bottom view, and a rear view of the sleeve fitting, respectively.

In FIGS. 1 and 2, reference numeral 2 denotes PBT, A
It is a jack housing molded in a substantially rectangular parallelepiped shape from a plastic material such as BS or nylon. The front (left side in the figure) of the jack housing 2 is a cylindrical sleeve 3
The plug insertion hole 4 is formed so as to penetrate the jack housing 2 from the cylindrical sleeve. In the jack housing 2, a leaf spring terminal piece 5 such as a sleeve terminal, a ring terminal, or a chip terminal is incorporated from the rear so that a contact portion faces the plug insertion hole 4, and the plug inserted into the plug insertion hole 4. 6 are electrically connected to each other.

As shown in FIGS. 2 and 3, a mounting groove 7 is recessed from the front surface 3 a in the pressure portion of the cylindrical sleeve 3.
The mounting groove 7, the cylindrical sleeve 3, and the plug insertion hole 4 are all arranged concentrically.

From the inner bottom surface of the mounting groove 7 to its opening (front)
A plurality of positioning projections 8 are provided at equal intervals along the circumferential direction of the mounting groove 7.

The number of the positioning projections 8 provided in the mounting groove 7 is determined by the number of the legs 11 of the sleeve fitting 10 described later, and is an integral multiple of the number of the legs 11. In the present embodiment, positioning projections 8 are provided at eight positions at intervals of 45 degrees corresponding to four legs.

A locking recess 9 is provided between adjacent positioning projections 8.
Therefore, the locking recesses 9 are also located at eight equally spaced locations along the mounting groove 7.

Both side surfaces of the tip of the positioning projection 8 are inclined guide surfaces 8a that taper the tip of the positioning projection 8, and the side surface of the positioning projection 8 that continues below the inclined guide surface 8a has a locking recess 9 Inner surface 9a.

A sleeve fitting 10 shown in FIG. 4 is attached to the front surface 3a of the cylindrical sleeve 3.

The sleeve fitting 10 is formed by punching a metal plate.
It is formed in an inverted crown shape by drawing and bending, and four leg portions 12 project from the outer peripheral edge of the ring-shaped portion 11 so as to be orthogonal to the ring-shaped portion 11. The four legs 12 are arranged at equal intervals at 90 degrees along the circumferential direction of the ring-shaped portion 11.

One of the legs is a positioning leg 12A which is longer than the other legs.
A retaining claw 13 having a side surface tapered 13a is provided, and the entire leg is formed in a substantially arrowhead shape.

The other leg 12B has four positioning legs 1
After molding 2A, the middle part in the shape of a substantially arrowhead is left, leaving one piece as shown in FIG.
FIG. 4B is a cross-sectional view taken along the line YY and the line XX in FIG. Therefore, a part of the tapered surface 13a is left on both sides of the tip of the other leg portion 12B, and the retaining claw 13 is provided.

The width between the two tapered surfaces 13a of the leg 12 is
The locking recess 9 is formed slightly wider than the gap between the opposed inner side surfaces 9a. When the leg portion 12 is pressed into the locking recess 9, the tapered surface 13a bites into the inner side surface 9a to prevent the sleeve fitting 10 from coming off. Fix it.

As is apparent from FIG.
A plug guide surface 14 inclined rearward is continuously provided on the inner peripheral edge of the sleeve 3, and the sleeve fitting 10 is attached to the front surface 3 a of the cylindrical sleeve 3.
When mounted on the plug insertion hole 4, it is arranged around the opening of the plug insertion hole 4.

Next, in the mounting structure of the jack sleeve fitting configured as described above, the sleeve fitting 10
The operation of attaching to the jack housing 2 will be described with reference to FIG.

FIG. 5 is a developed view in which the sleeve fitting 10 inserted into the mounting groove 7 is developed along the circumferential direction of the mounting groove 7.

When the four legs 12 of the sleeve fitting 10 are inserted into the mounting groove 7 from the front of the cylindrical sleeve 3, as shown in FIG. The positioning legs 4A projecting from the legs 12B of the positioning projections 8 abut against the inclined guide surfaces 8a of the positioning projections 8.

When the sleeve fitting 10 is further pressed downward in this figure from this state, the leg 12A moves in the direction of the arrow along the slope of the inclined guide surface 8a, and moves upward on the locking recess 9 shown in FIG. You will be guided to

At this time, while the leg portions 12 are arranged at regular intervals at 90 degrees, the locking recesses 9 are arranged at equal intervals at 45 degree intervals in the mounting groove 7, so that the other leg portions are arranged. The portion 12B is also located on the locking recess 9.

Further, when the sleeve fitting 10 is pressed downward in the figure, the retaining claw 13 penetrates the inner side surface 9a of the locking concave portion 9 and enters the locking concave portion 9, and comes off at the position shown in FIG. The pawl 13 is locked to the inner surface 9a, and the sleeve fitting 10 is positioned and fixed. In the position shown in FIG. 5C, the ring-shaped portion 11 of the sleeve fitting 10 is in contact with and covers a part of the front surface 3a of the cylindrical sleeve 3, and the plug guide surface 14 is formed in the opening of the plug insertion hole 4. It comes into contact with the peripheral inclined surface.

The pressing of the sleeve fitting 10 is performed manually, but a predetermined jig may be used in the work of attaching a large amount of the sleeve fitting 10 to the jack 1.

In the jack 1 to which the sleeve fitting 10 is attached as described above, the cylindrical sleeve 3 is exposed to the outside from the terminal plate of the VTR or the like, and the metal surface of the sleeve fitting 10 gives the jack 1 a sense of quality. Also, the plug guide surface 14
It covers the periphery of the opening of the plug insertion hole 4, protects the jack housing from collision with the plug 6, and smoothly guides the plug 6 to the plug insertion hole 4.

In this embodiment, the sleeve fitting 10 is provided with four legs 12, but the number is not necessarily limited as long as it is arranged at equal intervals in the circumferential direction of the ring-shaped portion 11.

It is not always necessary to use any one of the legs 12 as the positioning leg 12A. Conversely, a plurality of positioning legs 12A may be formed.

On the other hand, the number of the positioning projections 8 may be an integral multiple of the number of the legs 12, and need not be limited to eight positions as in this embodiment. If a larger number of positioning projections 8 are formed, the distance between the locking recesses 9 becomes smaller, and as a result, the amount of movement of the sleeve fitting 10 from the position shown in FIG. 5A to the position shown in FIG. In addition, the positioning work becomes easier.

In the present embodiment, the inclined guide surfaces 8a are formed on both side surfaces of the tip of the positioning projection 8, but the inclined guide surfaces 8a may be formed on only one surface as shown in FIG. The same operation and effect as those of the first embodiment can be obtained. That is, the positioning leg 12A abutting on the inclined guide surface 8a.
Moves along the inclined guide surface 8a and is guided on the locking recess 9 and is positioned and fixed in the locking recess 9 in the same manner as in the above-described embodiment.

[0052]

As described above, according to the first aspect, the sleeve fitting 10 is mounted in the mounting groove 7 recessed in the wall portion of the cylindrical sleeve 3 and mounted along the plug insertion hole 4. Therefore, there is no need to match the inner diameter of the plug insertion hole 4, and strict dimensional accuracy is not required.

The sleeve fitting 10 is provided with the plug insertion hole 4.
Since it is not exposed to the inside and does not come into direct contact with the plug 6, it does not fall out of the jack housing 2 due to the twisting action when the plug is pulled out.

Further, since the retaining claw 13 is engaged with the inner surface of the mounting groove 7 and the sleeve fitting 10 is fixed to the jack housing, the workability is improved without requiring a separate crimping jig.

An inclined guide surface 8 is provided at the tip of the positioning projection 8.
a is formed and the sleeve fitting 1 provided with the retaining claw 13
Since the structure is such that the zero leg portion 12 is guided to the locking position, the leg portion 12 is positioned at the locking position only by pressing the sleeve fitting 10. Therefore, the positioning work of the sleeve fitting 10 is not required, and the assembling workability is improved. Also, there is no possibility that the leg 12 is deformed by forcibly pressing the sleeve fitting 10 while the leg 12 is in contact with the protrusion between the locking recesses 9 by mistake. Further, there is no need to use a dedicated jig having a rotation positioning function.

The legs are provided at equal intervals along the ring-shaped portion, and the positioning protrusions are also provided at equal intervals along the mounting groove, so that one leg extends along the inclined guide surface. When the guide is guided on the locking recess, the other legs are also guided on the locking recess at the same time, and the positioning operation is not performed for each leg, so that the operation is simple.

According to the second aspect of the present invention, the positioning projections 8
Is an integral multiple of the number of legs of the sleeve fitting 10, so that the locking recess 9 between the adjacent positioning projections 8 is also an integral multiple of the number of legs. As the number of the locking recesses 9 increases twice or three times, the probability that the leg portions 12 are located on the locking recesses 9 between the positioning protrusions 8 increases, and Even in this case, the moving distance guided by the inclined guide surface 8a is reduced, and the sleeve fitting 10 can be more easily positioned at the locking position.

According to the third aspect of the present invention, at least one positioning leg portion 12A of the sleeve fitting 10 is connected to another leg portion 12A.
When the positioning leg 12A is guided by the locking recess 9, the other leg 12B is also positioned on the locking recess 9, and all the legs 12 are positioned by the inclined guide surface 8a. It is not necessary to carry out, and the mounting work becomes easier.

According to the fourth aspect of the present invention, the distal end of the positioning leg has a substantially arrowhead shape having tapered surfaces on both sides, and the other leg except the positioning leg has a substantially arrowhead-shaped intermediate portion and a ring-shaped portion. The sleeve according to the third aspect of the present invention, wherein the positioning leg and the other leg can be formed only by forming the leg having the same shape and cutting a part of the leg, since the leg is cut in parallel. Metal fittings can be manufactured with a common press die.

[0060]

[Brief description of the drawings]

FIG. 1 is a side view of a sleeve fitting according to the present invention and a partially broken jack.

FIG. 2 is a sectional view of FIG.

FIG. 3 is a front view of a cylindrical sleeve of the jack.

FIGS. 4A and 4B show the sleeve fitting of FIG. 1, wherein FIG. 4A is a front view, FIG. 4B is a side view, FIG. 4C is a low view, and FIG.

5A and 5B are views in which a sleeve fitting inserted into the mounting groove is developed along the circumferential direction of the mounting groove, and FIG. 5A is a developed view showing a state in which the leg portions abut the positioning protrusion. () Is a developed view showing a state in which the leg is guided to the locking position. (C) is a developed view showing a state in which the leg is locked in the locking recess.

FIG. 6 is a developed view of a sleeve fitting inserted into a mounting groove according to a different embodiment of the present invention, which is developed along a circumferential direction of the mounting groove.

FIG. 7 is a cross-sectional view showing a state in which a sleeve is mounted in the first conventional example.

8 is a partial sectional view of a jack to which the sleeve fitting of FIG. 7 is attached.

FIG. 9 is a partially cutaway side view showing a sleeve fitting of the second conventional example.

FIG. 10 is a cross-sectional view showing a state in which a sleeve is mounted in the second conventional example.

FIG. 11 is a developed view in which a sleeve fitting inserted into a mounting groove of the second conventional example is developed along a circumferential direction of the mounting groove.

[Explanation of symbols]

 2 Jack Housing 3 Sleeve 7 Mounting Groove 8 Positioning Protrusion 8a Slant Guide Surface 9 Locking Recess 9a Inner Side 10 Sleeve Fitting 11 Ring Shape 12 Leg 13 Lock Claw 13a Tapered Surface

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01R 17/04 510 H01R 17/18

Claims (4)

(57) [Claims] 1. A mounting groove 7 which is concentric with the cylindrical sleeve 3 from the front surface of the cylindrical sleeve 3 of the jack housing 2.
And a plurality of legs 12 are protruded from the ring-shaped portion 11 of the sleeve fitting 10 attached to the cylindrical sleeve 3 to lock the retaining claws 13 of the legs 12 with the inner surface of the mounting groove 7. In the mounting structure of the jack sleeve fitting for fixing the sleeve fitting 10 to the front surface of the cylindrical sleeve 3, the legs 12 of the sleeve fitting 3 are arranged at equal intervals along the ring-shaped portion 11, and the mounting grooves 7 are formed. Mounting groove 7 from inner bottom
A plurality of positioning projections 8 are protruded at equal intervals along the axis, and an inclined guide surface 8a is formed on at least one side surface of the tip of the positioning projection 8, and the leg 12 is positioned between the positioning projections 8 by the inclined guide surface 8a. A mounting structure for a sleeve fitting for a jack, characterized in that it is guided into the locking recess 9 and the retaining claw 13 is locked to the inner surface 9 a of the locking recess 9. 2. The number of positioning projections 8 is determined by the number of sleeve fittings 1.
2. The mounting structure for a jack sleeve according to claim 1, wherein the number of the legs is zero. 3. The positioning device according to claim 1, wherein at least one leg of the sleeve fitting is a positioning leg protruding from another leg.
Mounting structure of the jack sleeve bracket. 4. The tip of the positioning leg 12A has a substantially arrowhead shape having tapered surfaces 13a on both side surfaces.
4. A mounting structure for a sleeve fitting for a jack according to claim 1, wherein the other leg portion 12B other than 2A is formed by cutting at a substantially arrowhead-shaped intermediate portion in parallel with the ring-shaped portion 11. .