JPH0341429Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a jack into which plugs such as earphones and external input/output cords are inserted.

[Prior Art] This type of jack includes a jack in which a large number of contact pieces are individually assembled inside the jack body, and a jack in which a plug is inserted into the jack body and communicates with a plug insertion hole, as shown in Japanese Utility Model Publication No. 43-20025. Some jacks have an opening formed therein, the tip of a conductive wire wound around the outer periphery of the jack body protruding into the plug insertion hole through the opening, and a contact portion formed in this projection.

[Problem that the invention attempts to solve]

However, among the above-mentioned conventional jacks, in which a large number of contact pieces are individually assembled inside the jack body, it is extremely troublesome to assemble the contact pieces, and a large amount of equipment such as an automatic assembly machine is required for this installation. There was a problem that it took a while.

On the other hand, in the case where the tip of a conductive wire wrapped around the outer circumference of the jack body protrudes into the plug insertion hole through the opening, since it is a wire material, the attachment and fixation to the jack body becomes unstable and poor contact is likely to occur. , there was a problem of poor reliability. Further, in order to secure fixation and improve reliability, it is necessary to use a conductive wire with a large diameter. Also,
This requires bending the wire,
There were also problems in providing a compact jack that could be mass-produced.

The present invention was developed in view of the above-mentioned circumstances, and it is easy to assemble the contact piece, the contact part is securely held, and even if a thin band-shaped contact piece is used, it is easy to pry with a plug, etc. The aim is to provide a highly reliable jack that does not deform.

[Means for solving problems]

In order to achieve the above object, the jack according to the present invention has an approximately U-shaped cross section by forming the contact piece with a strip-shaped horizontal piece made of a thin metal plate and strip-shaped side pieces that are connected and suspended from both ends of the horizontal piece. and a contact portion is formed in a longitudinally intermediate portion of the horizontal piece so as to protrude downward, and the horizontal piece is along the upper surface of the jack body, and both side pieces are attached to both side surfaces of the jack body. The contact piece is fitted into the jack body along the same line, the contact portion protrudes into the plug insertion hole through the opening, and both side portions of the contact piece are engaged with concave and convex portions on both side surfaces of the jack body. It is characterized by this.

[Effect]

In the jack constructed as described above, the contact piece is fitted to the jack body on three sides by the strip-shaped horizontal piece and the side pieces, and the both side pieces are engaged with the jack body on both sides of the jack body. The whole thing is held in place by a jack and a jack body.
Since the contact part is formed to protrude downward from the band-shaped horizontal piece between the two side pieces, it can withstand prying caused by the plug due to two elastic forces: the elasticity of the horizontal piece and the elasticity of the contact part itself. It is not easily deformed even by such prying.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 5.

In the figure, numerals 21 to 23 are contact pieces, and 3 is a jack body to which these contact pieces 21 to 23 are attached.

The contact pieces 21 to 23 are made of thin metal plates, and have strip-shaped horizontal pieces 21a to 23a, and each horizontal piece 21
The strip side pieces 21b to 23b are formed in a substantially U-shape in terms of the side pieces 21b to 23b, which are connected and suspended from both ends of the sides a to 23a, respectively. Contact portions 21d to 23d are formed in the center portions of the horizontal pieces 21a to 23a, respectively, and are curved downwardly, and circularly punched engagement holes 21e are formed on both sides of these contact portions 21d to 23d. ~23e are drilled. On the other hand, rectangular engagement holes 21f to 23f are formed in each of the side pieces 21b to 23b, respectively. Furthermore, narrow terminals 21g to 23g are extended to the side pieces 21b to 23b, respectively, as necessary. That is, the terminal 21g is attached to both side pieces 21b, and the terminal 22g is attached to one side piece 22b.
However, terminals 23g extend from one side of the side piece 23b, and the terminals 22g and 23g extend from opposite side pieces.

The contact pieces 21 to 23 formed as described above are attached to the thin metal plate 1 as shown in FIG.
3 in a connected state, and in this state, as shown in FIG.
23b are bent downward at approximately right angles to the horizontal pieces 21a to 23a, and the jack body 3
When attaching the contact pieces 21 to 23 to the
This can be obtained by cutting off the connecting part between the parts and the remaining outer frame part 1b.

The jack body 3 is made of an insulating material such as synthetic resin, and has a circular plug insertion hole 3a extending rearward from the front at the center of the front side. Also,
The upper surface of this jack body 3 has the contact pieces 21 to
Grooves 31b to 33b having a width substantially equal to the width of the plug 23 are formed, and an opening 3c communicating with the plug insertion hole 3a is formed in the center of these grooves 31b to 33b. Further, the grooves 31b to 3
3b has the contact pieces 21 to 2 on both sides of the opening 3c.
Engagement holes 2 bored in the horizontal pieces 21a to 23a of 3.
31 d of upward engaging protrusions that engage with 1e to 23e
~33d is provided in a protruding manner. Furthermore, grooves 31b to 3 are provided on both sides of the jack body 3, respectively.
Preventive protrusions 31e to 33e whose upper portions are tapered are formed at predetermined positions corresponding to 3b. These retaining protrusions 31e to 33e engage with rectangular engagement holes 21f to 23f formed in both side portions 21b to 23b of the contact pieces 21 to 23.

The contact pieces 21 to 23 and the jack body 3 constituting this jack are constructed as described above, and these contact pieces 21 to 23 and the jack body 3 can, for example, form the jack body 3 as shown in FIGS. 3 and 4. It is positioned directly below each of the contact pieces 21 to 23 that are punched out while connected to the thin metal plate 1,
From this state, the punch 5 of the cutting machine is lowered from above the thin metal sheet material 1 toward the female die 4, which has holes through which the contact pieces 21 to 23 can be inserted.
By cutting all the connecting parts of each of the contact pieces 21 to 23, severing the connection relationship between the plurality of contact pieces 21 to 23, and further extending the stroke of the punch 5 to lower it, the jack body 3 is positioned directly below. To,
Each of the cut contact pieces 21 to 23 is pressed and fitted. In this case, both side pieces 21b to 23b of the contact pieces 21 to 23 are bent at a substantially right angle downward.
are the retaining protrusions 31e to 33e of the jack body 3.
It engages with the tapered surface of and expands outward once, and then returns inward as the rectangular engagement holes 21f to 23f and the locking protrusions 31e to 33e engage with each other. At the same time, the circular engagement holes 21e~
23e and the upward engaging protrusions 31d to 33d are also engaged, so that the contact pieces 21 to 23 are pressed into the jack body 3 in a manner that prevents them from coming off while maintaining accurate relative positions.

In this case, the horizontal pieces 2 of the contact pieces 21 to 23 are provided in the opening 3c that communicates with the plug insertion hole 3a.
Contact portions 21d to 23d formed in 1a to 23a are located, and these contact portions 21d to 23d protrude into the plug insertion hole 3a through the opening 3c,
It comes into contact with a plug (not shown) inserted into this plug insertion hole 3a. Furthermore, the opening 3c is
Horizontal piece parts 21a-2 including contact parts 21d-23d
3a, thereby preventing dust from entering from above.

In addition, the engagement holes 21e to 23 of the contact pieces 21 to 23
e, the engagement protrusion 31d engaged with 21f to 23f.
33d and the ends of the retaining projections 31e to 33e are thermally deformed to form the engagement holes 21e to 23e and the engagement holes 21f to
If it covers the periphery of 23f, the contact pieces 21~
23 can be held on the jack body 3 more reliably.

Further, in the present invention, for example, the contact part is integrally formed in the longitudinal middle part of the horizontal piece, and is inserted into the plug insertion hole by protruding into the plug insertion hole through the opening formed in the jack body. Any type of plug that comes into contact with the plug that has been installed may be used. Furthermore, the engagement of the concave and convex portions between both sides of the contact piece and both side surfaces of the jack body may be such that convex portions are formed on one side of both sides and the convex portions are engaged with concave portions on both side surfaces.

[Effect of idea]

As is clear from the above description, according to the jack according to the present invention, both sides of the contact piece are engaged with both sides of the jack body, and these both sides are connected to both ends of the hanging band-shaped horizontal piece. Since a contact part that comes into contact with the plug inserted into the plug insertion hole is formed in the longitudinal middle part, the contact part can cope with the prying of the plug by the elasticity of the contact part itself and the elasticity of the horizontal piece part. It does not easily deform and cause poor contact. Therefore, a jack constructed in accordance with the present invention is extremely reliable. Moreover, since assembly is completed simply by fitting the contact piece onto the outside of the jack body, assembly is easy and manufacturing costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the jack of the embodiment, Fig. 2 is a vertical cross-sectional view, Fig. 3 is a perspective explanatory view showing the assembly process, Fig. 4 is a cross-sectional explanatory view, and Fig. 5 is a cross-sectional view of the contact piece. FIG. 3 is an explanatory plan view showing a molding process. 21-23... contact piece, 21a-23a... horizontal piece part, 21b-23b... side piece part, 21d-23
d... Contact portion, 21f to 23f... Engagement hole, 3...
...Jack body, 3a...Plug insertion hole, 3c
...Opening portion, 31e to 33e... Removal prevention protrusion.

Claims (1)

[Claims for Utility Model Registration] A jack body made of an insulating material is provided with a plug insertion hole extending from the front toward the rear, and an opening communicating with the plug insertion hole is formed in the peripheral wall, and the plug is inserted into the plug insertion hole. In the jack, the contact piece is equipped with a contact piece having a contact part that comes into contact with a plug, the contact piece being a strip-shaped horizontal piece made of a thin metal plate, and strip-shaped side pieces that are connected and suspended from both ends of the horizontal piece. and a substantially U-shaped cross section, and the contact portion is formed in a longitudinally intermediate portion of the horizontal piece so as to protrude downward, and the contact piece is formed such that the horizontal piece follows the upper surface of the jack body and The both sides of the contact piece are fitted onto the jack body so that they are along both sides of the jack body, the contact portion is projected into the plug insertion hole through the opening, and the both side pieces of the contact piece are fitted onto both sides of the jack body. A jack characterized by an uneven engagement on the surface.