JPS6121816Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a jack in which an external additional switch can be added or removed by replacing a cover that is removably attached to the jack case.

Recently, with the diversification of devices and for the purpose of improving the operability of devices, there is not only a jack contact piece inside the jack case that simply contacts the electrode part on the plug side to maintain the connection state, but also a plug that can be inserted and removed. Jacks containing a plurality of change-over switches that can be switched by operation are widely used.

By the way, manufacturers who supply such jacks need to respond to customers by manufacturing various jacks with different numbers of built-in switches in consideration of a wide range of usage patterns.

However, if such jacks were individually designed and manufactured, special parts such as the jack case, etc., would be required for each individual component, which would result in a relatively high cost.

The present invention was developed in view of the above circumstances, and in order to ensure the alignment of the jack contacts and the terminals of the changeover switch, an external additional switch is provided on the side of the cover that is removably attached to the jack case. By replacing the cover, external additional switches can be added or removed as desired.
It is possible to respond flexibly depending on the usage pattern,
This provides an inexpensive jack by effectively utilizing common parts.

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings.

In the figure, 1 is a resin-molded jack case with an open rear end, and a cylindrical holder part 2 for plug insertion is provided protruding from the front wall 1a of the jack case. The sexual sleeve 3 is fitted. Reference numeral 11 denotes a ground contact piece that contacts the ground side electrode part P1 of the electrode parts of the plug P inserted into the jack case ₁ , and has a rectangular plate-like main part 11a.
A storage groove 1 provided in the jack case 1 on both sides of the
2 and a dogleg-shaped bent tip 11c of the tongue portion 11b that is press-fitted into the main portion 11a and extends from the front edge of the main portion 11a.
is made to face inside the cylindrical holder part 2. Further, a terminal portion 11d is made to protrude from the rear end portion of the main portion 11a in a direction perpendicular to the main portion 11a.

Reference numeral 13 denotes a ring contact piece that contacts the ring electrode part _P2 constituting the electrode part of one channel among the electrode parts of the plug P, and both side edges of the rectangular plate-shaped main part 13a are provided inside the jack case 1. Press fit into the housing groove 14, extend the tongue piece 13c punched out from the main part 13a from the front end of the main part 13a to the rear of the lower part, and bend the rear end of the main part 13a at a right angle. Thus, a terminal portion 13d is formed.

Reference numeral 15 denotes a tip contact piece that contacts the tip electrode part _P3 constituting the electrode part of the other channel among the electrode parts of the plug P, and the both side edges of the rectangular plate-shaped main part 15a are connected to the ground contact piece 11. Similarly, a tongue piece 15a is press-fitted into the housing groove 12, and is punched out from the main part 15a with one side left behind from the front end of the main part 15a to the upper rear, and a terminal is inserted from the rear end of the main part 15a. The portion 15c is made to protrude in a direction perpendicular to the main portion 15a.

The ground contact piece 11 and the tip contact piece 15 are press-fitted into the same housing groove 12, but the ground contact piece 11 is placed on the front end side of the jack case 1, and the tip contact piece 15 is placed on the rear end side of the jack case 1. The two are separated from each other by being placed in the

Further, a pair of contact pieces switches 16 and 17 are provided on both sides of the jack case 1 as built-in switches that are pressed by the electrodes of the plug P to perform switching operations.

The contact switch 16 is composed of a switching contact 18, a make contact 19, and a break contact 20, and the switching contact 18 has both side edges of a rectangular plate-shaped main portion 18a pressed into a housing groove (not shown). A contact portion 18c is provided by bending to have a step at the tip of a tongue portion 18b extending forward from the center of the main portion 18a at a required angle with the main portion 18a. A separator 18d made of an insulating material is attached to the back surface.

Further, a terminal portion 18e is integrally provided on the lower edge of the main portion 18a.

The make contact piece 19 is formed by press-fitting both side edges of the rectangular plate-shaped main part 19a into a housing part (not shown), and
A tongue portion 19c is extended from the front edge of the tongue portion 9a, the tip of which is branched into two limbs and bent into a square shape to form contact portions 19b, 19b. Note that the contact portions 19b, 19b are the contact portion 18c of the switching contact piece 18 when the plug P is not inserted.
A predetermined gap is maintained between the plugs P and P, so that they contact each other when the plug P is inserted. Further, a terminal portion 19d is integrally provided to protrude from the lower edge of the rear end portion of the main portion 19a.

The break contact piece 20 has a rectangular plate-like main portion 20a.
A notch groove 20b is provided at the center of the front end of the notch groove 2.
Contact portions 20c, 20c are provided at the upper and lower portions of the main portion 20a, and both edges of the main portion 20a are press-fitted into a housing groove (not shown), and the terminal portion 20d is inserted from the lower edge of the front end side of the main portion 20a. are integrally protruded.

On the other hand, the contact piece switch 17 is also the same as the contact piece switch 1.
Similarly to 6, the switching contact piece 18 of the contact piece switch 16,
It consists of a switching contact piece 25, a make contact piece 26, and a break contact piece 27, which are symmetrical to the make contact piece 19 and the break contact piece 20, respectively, and the corresponding parts are given the same alpha alphabet after each number. The explanation will be omitted.

By the way, the opening 1b on the rear end side of the jack case 1 is connected to a first cover 32 made of resin that is integrally provided with a jack case 31 that accommodates an external additional switch 30 on the back side, or a second cover 100 that does not have an external switch. It is blocked by

A partition wall 33 is provided at the base 37 of the first cover 32 to partition the jack main body side and the external additional switch 30 side, and a slit is provided in the partition wall 33 to communicate the inside of the jack case 1 and the inside of the switch case 31. There are 34.

In addition, fitting convex portions 35, 35 are provided at the upper end of the partition wall 33.
The fitting protrusions 35, 35 are fitted into the fitting holes 36, 36 provided on the upper surface of the jack case 1, and the fitting protrusions 36, 36 provided on both side edges of the base 37 are fitted into the fitting holes 36, 36 provided on the upper surface of the jack case 1. A fitting groove 3 provided in the locking walls 1c, 1c that can be integrally extended from both side walls of the
8 and 38, the first cover 32 can be removably attached to the jack case 1.

In addition, through-holes 39 are provided in the base 37 of the first cover 32, through which the terminal portions of the respective contact pieces described above are inserted.
By inserting each terminal portion into the through holes 39, alignment of the terminals can be ensured.

That is, the base 37 of the first cover 32 is connected to the locking walls 1c extending from both side walls of the jack case 1.
1c and held at a position a certain distance from the bottom wall 1d of the jack case 1, each terminal portion protruding from the bottom wall 1d is inserted into a through hole 39 provided in the base 37. By supporting each terminal part with the cover 32, each terminal part can be aligned at a predetermined position, and attachment to a printed circuit board or the like becomes easy.

By the way, the external addition switch 30 is the switching contact piece 4.
0, a make contact piece 41, a break contact piece 42, and a separator 43 made of an insulating material inserted between the switching contact piece 40 and the break contact piece 42.

The switching contact piece 40 has a tongue piece portion 40b bent into an L-shaped cross section from the lower edge of the rectangular plate-shaped main portion 40a.
is extended and a T-shaped contact portion 40c is provided at the tip thereof, and both side edges of the main portion 40a are accommodated in accommodation grooves 44 provided on the inner wall of the switch case 31, and the tongue portion is 40b projects into the jack case 1 through the slit 34.

Note that the terminal portion 40b extends from one side of the main portion 40a and protrudes from the bottom of the switch case 31 to the outside.

The make contact piece 41 has a rectangular plate-like main portion 41.
A tongue portion 41b extends from the lower side of the switch case 31, and a T-shaped contact portion 41c is provided at the tip of the tongue portion 41b. 45 so that the tongue portion 41b projects into the jack case 1 through the slit 34, and the contact portion 41c
is opposed to the contact piece 40c of the switching contact piece 40 at a predetermined distance. Note that the terminal portion 41d extends from the lower side of the main portion 41a and protrudes from the bottom of the switch case 31 to the outside.

Further, the break contact piece 42 has a main portion 4 having a rectangular plate shape.
A tongue portion 42b extends from the lower side of the main portion 42a in a direction perpendicular to the main portion 42a, and a contact portion 42c is provided at the tip of the tongue portion 42c, which is branched into two limbs and bent downward. The tongue portion 42b is inserted into the slit 34 by receiving both sides of the tongue portion 42b into a receiving groove (not shown) provided on the inner wall of the switch case 31.
The contact portion 42c is made to protrude into the jack case 1 through the contact portion 40c of the switching contact piece 40. Note that the terminal portion 42d extends from one side of the main portion 42a and protrudes from the bottom of the switch case 31 to the outside.

Furthermore, the separator 43 is connected to the operating section 4 having an L-shaped cross section from the lower side of the base 43a which also serves as a lid for closing the upper opening 31a of the switch case 31.
3b, and a cylindrical protrusion 43c made of the same insulating material as the separator 43 and having a hemispherical top is protruded from its tip, that is, the operating end.

Further, the operating portion 43b is made to protrude into the jack case 1 through the slit 34, and the protruding portion 43c, which is the operating end, is inserted into the tip contact piece 15.
The tongue portion 15b is brought into contact with the back surface of the tongue portion 15b. In other words, the plug P is inserted into the jack case 1,
The tip electrode portion _P3 of the plug P is connected to the tongue portion 15b.
When pressed, the tongue portion 15b is pushed downward, the operating portion 43b also moves downward, and the contact portion 40c of the switching contact piece 40 separates from the contact portion 42c of the break contact piece 42 to become a make contact piece. 41 contact portion 41c.

Note that a notch 47 having a semicircular cross section is provided on the proximal end side of the operating portion 43b of the separator 43 to increase the flexibility of the operating portion 43b.

Further, a pair of locking parts 48, 48 are provided on the front wall of the base 4a of the separator 43, and the first cover 3
When the separator 43 is engaged with the jack case 1 of No. 2, the upper end portions of the locking portions 48, 48 are pressed by the opening edge on the rear end side of the jack case 1.
Also, each contact piece 40, 41, 42 constituting the external addition switch 30 is prevented from coming off from inside the switch case 31.

Further, as shown in FIG. 6, the second cover 100 has a cylindrical portion 103 protruding from the base 102, and a coil spring 101 inserted into the cylindrical portion 103.
The tongue portion 15b of the tip contact piece 15 is pressed at one end, so that the elastic force of the tip contact piece 15 is supplemented by the coil spring 101, and the external addition switch 30 and the switch case housing the same are provided. It has the same shape as the first cover 32 except that it does not have the cover 31.

According to the present invention, the cover 32 removably attaches the external additional switch 30 to the jack case 1.
Since the external addition switch 30 is provided on the side, it is easy to attach and remove the external addition switch 30. If the external addition switch 30 is not needed, an external addition switch 30 as shown in FIG. 6 can be used in place of the first cover 32. The rear end side opening 1b of the jack case 1 can be closed with the second cover 100 which does not have a switch.

Therefore, the manufacturer of such a jack needs to provide a jack body with jack contacts (earth contact 11, ring contact 13, tip electrode 15) and built-in switches (contact switches 16 and 17). On the other hand, by manufacturing a first cover 32 with an external addition switch 30 and a second cover 100 without an external addition switch, two types of jacks can be provided by rearranging the jack body and the cover. It is.

Furthermore, since the jack body side can be mass-produced as a standard or common part, manufacturing costs can be significantly reduced.

Furthermore, the external additional switch 30 is provided on a first cover 32 for ensuring terminal alignment, and this first cover 32 is attached to the jack case 1 at the final stage of the jack assembly process. , the jack body before the first cover 32 is attached is kept in stock as a semi-finished product, and when an order is received from a customer, the necessary first or second cover 32,100 is attached and shipped. You can also.

Further, in this embodiment, the main portions 40a, 41a, 42 of the contact pieces 40, 41, 42 of the external addition switch 30
a, and the base 43a of the separator 43 are housed in the switch case 31, and each is bent into an L-shape, and only the operating portion is provided in the partition wall 33.
Since the structure is such that the first cover 32 protrudes to the outside through
0 is extremely easy to install and remove.

Further, in this embodiment, the contact piece switches 16 and 17, which are built-in switches, are arranged so that the separators 18d and 25d, which are the operating ends thereof, face the plug insertion path 60 near the plug insertion opening, and the operating end of the external addition switch 30 The protrusion 43c is connected to the tip contact piece 15.
Because the structure is such that it is placed on the back of the
It is possible to ensure a shift in switching timing between the contact pieces switches 16 and 17 and the external additional switch 30.

That is, when the plug P is inserted, first the contact pieces switches 16 and 17, which are built-in switches, are switched, and then the external additional switch 30 is switched. Conversely, when removing the plug P, use the external additional switch 30.
After the switching operation is performed, the changeover switches 16 and 17 are changed over.

Therefore, if the jack shown in this embodiment is used as a headphone jack for a portable radio, commonly called a "radio-cassette player," which combines a transistor radio and a cassette tape recorder, it will be possible to use the headphone for monitoring during recording. Moreover, it also provides the special advantage that no howling phenomenon occurs when inserting and removing the plug.

FIG. 5 shows an example of the connection circuit. That is, when both output terminals of amplifier R and amplifier L are connected to respective break contacts 20 and 27 of contact pieces switches 16 and 17, which are built-in switches, respective changeover contacts 18 and 25 of contact pieces switches 16 and 17 are connected. They are connected to speakers 50 and 51, respectively. Further, the break contacts 20 and 27 are connected to the chip contact piece 15 and the ring contact piece 13 through attenuator resistors _R1 and _R2 , respectively. Further, lead terminals for canceling the muting operation of the muting circuit 52 are connected to the switching contact piece 40 and the break contact piece 42 of the external addition switch 30, respectively.

Next, the operation of this circuit will be explained.

Normally, when the recording button is operated to start recording, the muting circuit 52 is activated at the same time.
Amplifier output becomes zero.

Next, when the headphone plug P is inserted into the jack case 1, the built-in contacts 16 and 17 operate to cut off the speaker circuit and switch the outputs of the amplifiers R and L to the headphone side.

Following this operation, the external addition switch 30 performs a switching operation, so that the muting operation of the muting circuit 52 is canceled, and the monitor outputs from the amplifiers R and L are output to the headphone side.

During this time, since the speaker circuit is cut off before the muting operation is canceled, there is no risk of howling occurring when the plug is inserted.

Furthermore, since the speaker circuit is connected after the muting operation is restarted even when the plug P is removed, there is no risk of howling occurring as in the case when the plug P is inserted.

Further, according to the jack shown in this embodiment, the operating end of the external addition switch 30 is arranged on the back side of the tip contact piece 15, and the tip electrode part _P3 on the plug side is in contact with the tip contact piece 15. In this state, the tip contact piece 15 is connected to the tip electrode part by its own elasticity, that is, by the elasticity of the switching contact piece 40 and the make contact piece 41 of the external addition switch 30.
P Because the pressure is biased in _three directions,
The contact force of the tip contact piece 15 with the tip electrode portion _P3 is improved, and the removal force of the plug is also significantly improved.

Moreover, there is no need to insert a coil spring or the like into the back surface of the tip contact piece 15 as in the past, and the elastic force of the external addition switch 30 itself is used, so no special parts are required and the external A jack with an additional switch can be manufactured at low cost.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing one embodiment of the present invention;
Fig. 2 is a cross-sectional view of the same embodiment, Fig. 3 is a cross-sectional view showing the plug insertion state of the same embodiment, Fig. 4 is a cross-sectional view taken along line X-X' in Fig. 2, and Fig. 5 is a cross-sectional view of the same embodiment. A circuit diagram showing an example of the use of the jack shown in the example, FIG.
It is a perspective view showing an example. 1... Jack case, 11, 13, 15...
Jack contact piece (earth contact piece, ring contact piece, tip contact piece), 16, 17... Built-in switch (contact piece switch), 30... External addition switch, first cover, 100... Second cover, P...Plug,
P ₁ , P ₂ , P ₃ ...Each electrode part of the plug (earth side electrode part, ring electrode part, tip electrode part).

Claims (1)

[Scope of utility model registration request] A jack case 1 is provided with respective jack contact pieces 11, 13, 15 that contact the electrodes P ₁ , P ₂ , P ₃ of the plug P, and the jack case 1 is arranged inside the jack case 1, and when the plug P is inserted, Built-in switches 16, 1 such as actuated contact switches
7 is removably attached to the jack case 1 as a cover, and supports the jack contact pieces 11, 13, 15 and the built-in switches 16, 17 so that their respective terminals are aligned and taken out to the outside, and the plug P
jack contact piece 1 that is operated in contact by pushing the
a first cover 32 made of an insulating material, which is provided with an external additional switch 30 that is interlocked with at least one of 1, 13, and 15 through a separator 43 made of an insulating material to switch and operate the switching contact piece 40; The cover is removably attached to the jack case 1, and includes the jack contact pieces 11, 13, 15, and the built-in switch 1.
A second cover 100 made of an insulating material and having no externally added switch supports the terminals 6 and 17 so as to align them and take them out to the outside. , second
A jack characterized in that either one of the covers 32, 100 can be selectively attached.