JP3265196B2 - Jack - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jack which is a kind of connector used as a connection terminal for a microphone, a headphone, a power cord and the like in various AV devices and the like, and particularly to a jack mechanism excellent in assemblability. Things.

[0002]

2. Description of the Related Art Generally, a connection between an AV device or the like and a microphone, a headphone, a power cord, or the like is made by inserting a plug provided at the end of the cord into a jack provided on the AV device or the like.

The plug includes a first electrode made of a conductive pin terminal extending at the center of a cylindrical sleeve, and a second electrode made of a cylindrical conductive sleeve (also called an earth terminal). It is composed of

On the other hand, when the plug is inserted, the jack is in contact with the outer surface of the sleeve of the plug and is electrically connected thereto, and the contact is in contact with the pin terminal of the plug and is electrically connected thereto. And

[0005] The sleeve sleeve of the jack is punched out of a thin plate spring material such as phosphor bronze having elasticity and good conductivity into a required shape, for example, a rectangular shape, and then bent at one end into a U-shape. It is manufactured as a contact that contacts the sleeve of the plug and the other end as a terminal.

[0006] Contacts are similarly fabricated. The sleeve spring and the contact thus manufactured are attached to predetermined positions in a jack case integrally formed of a synthetic resin.

Conventional jacks, for example, Japanese Utility Model Application 2-45
As shown in FIGS. 5 and 6, the jack disclosed in Japanese Patent No. 977 includes a jack case 1 formed in a box shape and a sleeve spring 2 that comes into contact with an electrode of a plug. The jack case 1 is provided with a plug insertion port 3 protruding from the front side for inserting a plug.
A plug insertion path 4 communicating with the plug insertion port 3 is provided inside the inside. On the back side of the jack case 1, a housing groove 5 is provided along the side wall into which the sleeve spring 2 is inserted.

The sleeve spring 2 is connected to the electrode portion of a plug (not shown) to obtain an electrical connection by directly contacting the electrode portion, and the sleeve spring 2 is provided outside the jack case 1 by being connected to the contact portion 2a in an intersecting manner. The terminal portion 2b to be extended is formed separately, and each is formed by a separate member.

The contact piece 2a is formed by folding a plate member into a curved shape and bending a tip portion into a U-shape to form a contact portion.

[0010] The sleeve spring 2 composed of the two members
Is designed so that the contact piece 2a and the terminal 2b are inserted into a common receiving groove, and the contact piece 2a and the terminal 2b are press-contacted and connected to each other in a state of being inserted into the jack case 1. .

As described above, by forming the sleeve spring 2 as a separate member, the contacting portion 2a having spring properties is manufactured from a spring member such as a phosphor bronze plate, and the terminal portion 2b is compared with the phosphor bronze plate portion. Since the contact piece 2a and the terminal 2b can be made of suitable materials according to their respective functional purposes, they can be manufactured from a cheap brass plate or the like.

Japanese Utility Model Laid-Open No. 6-36256 discloses a power jack having an improved sleeve spring.

As shown in FIGS. 7 and 8, the jack 6 has an external power supply plug 8 inserted into the plug insertion hole 7.
And a sleeve spring 9 having a curved contact piece 9a elastically contacting the ground terminal 8a. The sleeve spring 9 rises from the elastic leaf spring 9b of the main body separately from the main contact portion 9a and is curved.
Prior to the contact of the plug 8 with the ground terminal 8a while being elastically bent, the influence of the bending action is determined by the main contact portion 9a.
This is a so-called two-point contact structure provided with an auxiliary contact portion 9c formed without affecting the a. As described above, the auxiliary contact portion 9c of the sleeve spring 9 including the main contact portion 9a and the auxiliary contact portion 9c provided on the same elastic leaf spring is connected to the plug 8
, An electrical connection state can be ensured even when an unexpected external force is applied, and the occurrence of temporary disconnection of the power supply when the plug 8 is inserted can be prevented.

[0014]

However, in the case where the contact portion and the terminal portion are electrically connected by surface contact, such as a jack disclosed in Japanese Utility Model Application No. 2-45977, both of them are connected to each other. When attaching to the jack case,
There was a problem that the jack case was easily deformed or cracked by press fitting.

Further, as in the jack of Japanese Utility Model Laid-Open No. 6-36256, the main contact portion and the auxiliary contact portion of the sleeve spring are integrally formed by the same elastic plate, and the sleeve spring itself and the jack case are not provided. Strict precision is required for the shape and dimensions, and there has been a problem that the manufacturing cost is high. or,
If the plug is largely twisted and inserted, the main contact portion 9a and the auxiliary contact portion 9c of the two-point contact structure formed of the same member are distorted, and the ground terminal 8a of the plug and the auxiliary contact portion are distorted. There is a problem that the contact with the portion 9c is separated. Therefore, there is a problem to be solved by a sleeve spring having a structure in which the assembly of the sleeve spring is easy and the deformation of the jack case or the like does not occur.

[0016]

In order to solve the above-mentioned problems, a jack according to the present invention comprises: a contact which is brought into contact with a first electrode of a plug inserted into a jack case to be electrically connected; A sleeve spring that is electrically connected by detecting a plug inserted into the case and making contact with the second electrode of the plug, and turning on / off an electrical connection with the sleeve spring by inserting and removing the plug into and from the jack case. A terminal that is turned off, and an auxiliary spring that is disposed at a position orthogonal to the sleeve spring and contacts the second electrode of the plug to obtain an electrical connection and makes elastic contact with the sleeve spring to obtain an electrical connection. , The contact, front
The sleeve spring, the terminal, and the auxiliary spring
Each of them is configured separately, and the same
This is to assemble from one direction.

Since the contact, the sleeve spring, the terminal, and the auxiliary spring for obtaining the electrical connection are formed as separate members, the restrictions on their shapes and dimensions are relaxed without impairing the performance, and the manufacturing is completed. And assembly becomes easy.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a power jack as a preferred embodiment of a jack according to the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view of a jack case 10, a contact 20, a sleeve spring 30, a terminal 40, and an auxiliary spring 50 constituting a jack.
FIG. 2A is a front view of the jack as viewed from the plug insertion port side, and FIG. 2B is a rear view of the jack.
(C) is a right side view of the jack, FIG. 2 (D) is a bottom view of the jack, and FIG. 2 (E) schematically shows an electrical connection relationship between the contact, the sleeve spring, the terminal, and the auxiliary spring. FIG. 3 is an electric circuit diagram shown in FIG.

Hereinafter, the jack case 10 and the contact 2
0, sleeve spring 30, terminal 40, auxiliary spring 50
, And the assembly of the entire jack will be sequentially described.

As shown in FIG. 1, the jack case 10 is integrally formed of a synthetic resin material in an outwardly-approximately cubic shape, has a circular plug insertion port 11 at the front part, and is connected to the internal space of the jack case 10. It has a communicating structure.

The upper half of the inside of the jack case 10
As shown in FIG. 2A, a plug connection portion 12a provided with a cylindrical portion 13 for guiding a pin terminal, which is a first electrode of a plug (not shown), and a lower half of FIG. 2B and FIG. As shown in FIG. 5, a sleeve spring engaging portion 12b is formed in a space for fitting a sleeve spring 30 described later. The left and right widths of the sleeve spring engaging portion 12b are:
It is designed to be slightly smaller linearly downward.

The lower surface side of the plug connection portion 12a is formed horizontally, and as shown in FIG. 2C, a cylindrical portion 13 is formed to protrude forward from the rear central portion of the plug connection portion 12a. It has reached 11. This cylindrical part 13
The contact 20 is inserted into the center hole from the rear.

As shown in FIG. 1, a cross-shaped groove 12c having a cross-shaped cross section is provided in the plug connecting portion 12a extending in the center line of the cylindrical portion 13 in a horizontal direction with respect to the cylindrical portion 13. . The contact 20 is inserted into the cross-shaped groove 12c.

A notch 15 is provided at the bottom of the sleeve spring engaging portion 12b from the rear end of the jack case 10 to a substantially central position (not shown) inward. The notch 15 is used to connect the sleeve spring 30 to the jack case 1.
When it is incorporated into the sleeve spring 30, it becomes a passage for the terminal portion 31 of the sleeve spring 30. Further, locking portions 15a and 15b which are cut out in the left and right direction are provided on both left and right sides of the cutout 15 formed inward from the rear end of the jack case 10. The locking portions 15 a and 15 b lock with the stopper springs 34 and 35 of the sleeve spring 30 to engage and lock the sleeve spring 30 in the jack case 10.

On the other hand, on the back side of the jack case 10,
In FIG. 1, the structure is such that a groove 14 is provided vertically along the right side wall. The groove 14 is formed in a gap into which the upper and lower ends of the main body 51 of the auxiliary spring 50 are inserted. Groove 1
A groove 14a bent at a right angle to the inside of the jack case 10 communicates with a lower part of the jack case 4, and the groove 14a communicates with the hollow sleeve spring engaging portion 12b. The sleeve spring contact piece 53 of the auxiliary spring 50 is located at the sleeve spring engaging portion 12b via the communicating groove 14a.

The plug connection portion 1 of the jack case 10
Notch grooves 16 are provided at left and right ends between the sleeve spring engaging portion 12a and the sleeve spring engaging portion 12b. This notch groove 16
Is a sleeve spring contact portion 41 of the L-shaped terminal 40.
For engaging and locking both ends of the.

As shown in FIG. 1, the contact 20 is formed by bending an elongated rigid conductive plate at a substantially right angle at a substantially right angle to form an L-shape, and one side of which is in contact with a pin terminal which is a first electrode of the plug. It comprises a terminal contact part 21 and a terminal part 22 for connecting the other side to the printed wiring board. The pin terminal contact portion 21 is bifurcated and sandwiches the pin terminal of the plug from the left and right at the tip. Further, the tip of the terminal portion 22 of the contact 20 is bent in a V shape.

The sleeve spring 30, as shown in FIG.
A conductive plate having a rectangular shape with elasticity is bent at a bent portion 32 near the center with a large curvature to form an elastic member.

The sleeve spring 30 includes a lower base portion 33a and an upper elastic portion 33b with the bent portion 32 as a boundary.

In FIG. 1, the base 33a is
A terminal portion 31 extending downward from a substantially central position extending in a direction perpendicular to the lower side, and having a distal end bent in a U-shape;
Stopper springs 34, 35 provided on both left and right sides of the first spring 1 and springing in the direction of the terminal portion 31, an auxiliary spring contact portion 36 having a circular convex portion, and a tip portion 37 are integrally formed.

The upper portion of the elastic portion 33b, which is formed in the shape of an elastic plate at the boundary of the bent portion 32 of the sleeve spring 30, is provided with a plug contact portion 33c which is elastically contacted when the surface of the bent portion 32 is pressed by a plug (not shown). The terminal contact whose left and right widths and length in the front-rear direction of the base portion 33a are slightly smaller, and whose widths are linearly reduced toward the front, and whose free end center position is cut out in a substantially elliptical shape. Parts 38 and 39 are formed.

As shown in FIG. 1, the terminal 40 has a sleeve spring contact portion 41 which forms a piece obtained by bending an elongated rigid conductor into an L shape, and a terminal which is bent perpendicularly to the sleeve spring contact portion 41. And a unit 42.

The sleeve spring contact portion 41 is provided with convex portions 41 a at both ends formed in a long flat plate shape, and the lower surface of the flat plate contacts the terminal contact portions 38 and 39 of the sleeve spring 30 to be electrically connected. .

The terminal 40 having such a structure
Is inserted into the jack case 10 by engaging the convex portion 41a with a notch groove 16 provided in the horizontal direction at a substantially central position on the back surface of the jack case 10. The terminal section 42 serves as a connection terminal to the printed wiring board.

That is, as shown in FIG. 3, the sleeve contact portion 41 and the terminal contact portion 38, which are electrically connected,
39 means that when the second electrode of the plug comes into contact with the plug contact portion 33c and is inserted, the terminal contact portions 38, 39 move downward in FIG. 3, and the sleeve contact portion 41 and the terminal contact portions 38, 39 Are separated and electrically turned off.

As shown in FIG. 1, the auxiliary spring 50 is formed by bending the lower side of a substantially rectangular conductive plate at right angles, and the upper side is in electrical contact with the second electrode of a plug (not shown). The main body 51 for connection and the lower side bent at a right angle reinforce the auxiliary spring 50 itself and guide the sleeve spring 3.
0 and a supporting portion 52 that makes electrical connection by contact with the support portion 52.

The upper body 51 has a plug contact portion 51a which is cut out from a substantially intermediate position on the front side to be inserted and bent inwardly to form an elastic tongue.
An engaging piece 51b, which is opposite to 1a and has a free end cut off on three sides and bent outward, is formed.

The lower supporting portion 52 bent at right angles to the main body 51 has a base 52a connected to the main body and a notch extending outside the base 52a and bent at right angles. And a sleeve spring contacting piece 53 whose free end is bent downward to form an elastic contacting piece.

The auxiliary spring 50 having such a structure is
Insert from the groove 14 provided on the back of the jack case 10,
The engaging piece 51b is engaged with the opening provided in the groove 14 and is prevented from coming off and incorporated.

At this time, as shown in FIG. 4, the sleeve spring contact piece 53 is attached to the auxiliary spring contact portion 36 of the sleeve spring 30.
Has a structure in which an electrical connection can be obtained by elastic contact from above.

That is, the contact between the auxiliary spring contact portion 36 of the sleeve spring 30 and the sleeve spring contact piece 53 of the auxiliary spring 50 is performed when the auxiliary spring 50 is inserted into the jack case 10 and assembled. Have a structure in which they contact and apply pressure while sliding on the upper surface of the auxiliary spring contact piece 36 to obtain electrical connection. Therefore, even if the dimensional accuracy is relatively low, the electrical connection can be reliably obtained, and the sleeve spring 30 is connected to the jack case 1.
There is also a function of positioning and fixing within 0.

The auxiliary spring 50 is connected to the jack case 10.
2A, the plug contact portion 51a is arranged vertically and the plug contact portion 33c is arranged horizontally with the cylindrical portion 13 as an axis. The lower side of the second electrode of the plug (not shown) is in contact with the plug contact portion 33c, and the side of the second electrode is in contact with the plug contact portion 51a to obtain electrical connection.

Next, the assembling method of assembling the four contacts 20, the sleeve spring 30, the terminal 40, and the auxiliary spring 50 having the above-described structure in the jack case 10 will be described with reference to FIGS. 1 and 2A and 2B. , (C), (D)
This will be described with reference to FIG.

First, the sleeve contact portion 4 of the terminal 40
1 is inserted into the notch groove 16 provided on the back surface of the jack case 10 (see FIGS. 2B and 2C).

Next, the plug contact portion 33 of the sleeve spring 30 is attached to the sleeve spring engagement portion 12b of the jack case 10.
Insert with c forward. When the sleeve spring 30 is pushed all the way forward, the stopper spring 3
4 and 35 are engaged with the locking portions 15a and 15b, and are prevented from falling out of the jack case 10. At the same time, the sleeve spring 3
The terminal contact portions 38 and 39 of the terminal 0 abut on the lower surface of the sleeve spring contact portion 41 of the terminal 40 and become electrically connected (see FIGS. 2B and 2C).

In this state, the main body 51 of the auxiliary spring 50 is fitted and inserted into the groove 14 of the jack case 10. When the auxiliary spring 50 is inserted as far as it will go,
No. 0 is locked in the jack case 10 by engaging the stopper spring 51 b with the opening provided in the groove 14.

At the same time, the sleeve spring abutment portion 53 of the support portion 52 of the auxiliary spring 50 is formed by the elasticity of the sleeve spring 3
The auxiliary spring 50 contacts the upper surface of the auxiliary spring contact portion 36 to support the sleeve spring 30 in the jack case 10 and electrically connect the auxiliary spring 50 and the sleeve spring 30 (FIG. 2).
(See (B) and (C)).

Finally, the contact 20 is inserted into the cross groove 12c of the plug connection portion 12a, and is engaged with the claw 20a of the contact 20 (not shown) so that the contact 20 is prevented from coming off and locked in the jack case 10.

When the plug is inserted into the jack thus assembled, the plug contact portion 33c of the sleeve spring 30 comes into contact with the plug sleeve and is pushed down. As a result, the terminal contact portion 3 of the sleeve spring 30
The sleeve contact portion 41 of the terminal 40 that is in contact with 8, 39 is separated, and the electrical connection state changes from on to off (see FIG. 2C). Therefore, as shown by arrows in the circuit diagram of FIG. 2E, the sleeve spring contact portion 41 of the terminal 40 and the terminal contact portion 38 of the sleeve spring 30,
Since a switch that can be contacted with 39 is formed, the terminal 40 can be used as a terminal for detecting insertion and removal of a plug.

As described above, if the conductive members for obtaining the electrical connection are formed separately from each other and are electrically connected in the jack case 10, the respective members, in the embodiment, the sleeve spring 30 and the terminal 40, the structure itself of the auxiliary spring 50 is simplified, and the dimensional accuracy can be relaxed, so that the assembly can be easily performed.

Further, the parts where the pressure and the like are generated are separated in advance, for example, the auxiliary spring contact portion 36 of the sleeve spring 30 and the sleeve contacting piece 53 of the auxiliary spring 50 are separated from each other. Sometimes, it is possible to avoid excessive pressing by elastic contact, so that no excessive force is applied to the jack case 10 itself and each member, so that the performance of the jack itself can be improved. Then, a material corresponding to the characteristic function of each member can be used.
For example, the jack case 10 as a housing is made of ABS.
/ PBT is used, the contact 20 can be made of phosphor bronze, the sleeve spring 30 can be made of copper-titanium alloy, the terminal 40 can be made of brass, and the auxiliary spring 50 can be made of Cu-Al alloy.

Although the power supply jack according to the present invention has been described above, the present invention is of course applicable to other jacks. In short, the conductive member incorporated in the jack case is changed according to the function. Needless to say, the present invention covers all the structures assembled as separate members so as to obtain an electrical connection when incorporated in the jack case.

[0054]

In the jack according to the present invention, the sleeve spring, which is a conductive member electrically connected to the plug, the terminal, and the auxiliary spring are formed as separate members. And the design and assembly work of the jack is simplified, and the associated costs are reduced.

Further, since the sleeve spring and the auxiliary spring have a structure that makes two-point contact with the plug and are formed of separate members, even when the plug is inserted with twisting, the respective contacts can be reliably obtained. be able to.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of each member constituting a power jack according to the present invention.

2 (A) is a front view, FIG. 2 (B) is a rear view,
2C is a side view, FIG. 2D is a bottom view, and FIG.
FIG. 2 is an electric circuit diagram schematically shown.

FIG. 3 is an explanatory diagram showing an electrical connection state between a sleeve spring and a terminal constituting the power supply jack.

FIG. 4 is an explanatory diagram showing an electrical connection state between a sleeve spring and an auxiliary spring constituting the power supply jack.

FIG. 5 is an exploded perspective view showing a conventional jack case and a sleeve spring.

FIG. 6 is a cross-sectional view of a main part showing a relationship between a terminal portion housed and arranged in a jack case and a contact piece according to a conventional technique.

FIG. 7 is a cross-sectional view of another conventional jack.

FIG. 8 is (a) a plan view, (b) a side view, and (c) a rear view of a sleeve spring arranged in a jack according to another conventional technique.

[Explanation of symbols]

10 Jack case; 11 Plug insertion opening; 12a
Plug connection portion; 12b sleeve spring engagement portion; 12c cross groove; 14 groove; 14a groove; 15 notch;
Locking portion; 15b Locking portion; 16 notch groove; 20 contact; 20a claw; 21 pin terminal contact portion; 22 terminal portion; 30 sleeve spring; 31 stopper spring;
Bending portion; 33a Base portion; 33b Elastic portion; 33c Plug contact portion; 34 Stopper spring; 35 Stopper spring; 36 Auxiliary spring contact portion; 37 Auxiliary spring contact portion;
Terminal contact portion; 40 terminal; 41 sleeve spring contact portion; 41a convex portion; 42 terminal portion; 50 auxiliary spring; 51 main body portion; 51a plug contact portion;
Engagement piece; 52 support; 52a base; 53 sleeve spring support; 53 sleeve spring contact piece

Claims (1)

(57) [Claims] A contact for electrically connecting to a first electrode of a plug inserted into the jack case; detecting a plug inserted into the jack case and contacting a second electrode of the plug; An electrically connected sleeve spring; a terminal for turning on / off an electrical connection to the sleeve spring by inserting and removing a plug into and from the jack case; and a terminal arranged at a position orthogonal to the sleeve spring. An auxiliary spring for obtaining an electrical connection by making contact with the second electrode and elastically contacting the sleeve spring to obtain an electrical connection, the contact, the sleeve spring, the terminal,
A jack, wherein each of the auxiliary springs is formed separately, and is assembled to the jack case from the same direction.