JP2863048B2 - Multi-pole connector plug - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a multi-pole connector plug used for a connector for connecting detachable devices.

[0002]

2. Description of the Related Art Conventionally, a video camera 10 and a television receiver 1 which are examples of detachable devices as shown in FIG.
4 is connected, a connector plug (not shown) connected to one end of the cable 13 is inserted and connected to a connector socket (not shown) provided on the video camera 10.
By inserting and connecting a connector plug (not shown) connected to the other end of the cable 13 to a connector socket (not shown) provided on the television receiver 14, the video camera 10 and the television receiver 14 are electrically connected. The video and audio recorded in the video camera 10 can be reproduced by the television receiver 14.

[0003]

However, in the conventional connection in which the connector plug of the cable 13 is inserted into the connector socket as shown in FIG. 9, video and audio are recorded and reproduced by the video camera 10. In case,
Since the connector plug must be removed or inserted from the connector socket with a force higher than the connection holding force between the connectors, there is a problem that the connection between the devices is troublesome.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a connector plug which allows easy connection between devices and which can be reduced in size and cost. is there.

[0005]

SUMMARY OF THE INVENTION A multi-pole connector plug according to the present invention is provided with a housing having a plurality of contact receiving portions, a contact received in the contact receiving portion of the housing, and engaging with the housing. A cover for closing the lower surface of the housing, and the contact accommodating portion penetrates a long hole-shaped contact protrusion opening on the upper surface of the housing toward the lower surface, and the contact includes a wire rod. A coil winding portion wound in a coil shape; and a contact portion formed by extending and bending one end of the coil winding portion so as to make the coil winding portion a torsion spring. Is supported by the housing and the cover, and the contact portion of the contact projects outside from the contact projecting opening of the housing. And it is characterized in Rukoto.

[0006]

The contact of the connector plug includes a coil winding formed by winding a wire into a coil shape, and a contact formed by extending and bending one end of the coil winding to form the coil winding as a torsion spring. Since the coil winding is supported by the housing and the cover, a sufficient spring length can be obtained without increasing the external dimensions of the contact. Therefore, the contact reliability can be improved without increasing the size of the contact.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 5 shows an example in which the connector plug according to the present invention is used as a connector for connecting detachable devices. In FIG. 5, reference numeral 10 denotes a small-sized video camera, 12 denotes an adapter for the video camera 10, 14 denotes a television receiver coupled to the adapter 12 via a cable 13, and the video camera 10 is detachably attached to the adapter 12. Video camera 10
The video and audio recorded on the video camera 10 can be reproduced by the television receiver 14 by pressing and contacting the connector socket 16 provided on the side and the connector plug 18 provided on the adapter 12 side.

FIGS. 1 to 4 show details of the connector plug 18 of FIG. In FIG. 1, 50 is a housing made of an insulator such as plastic, 52 is a cover made of an insulator such as plastic, 54 is a contact wound with a conductive wire in a coil shape to function as a torsion spring.

The contact 54 is shown in FIG.
As shown in (b), a coiled portion 54a formed by processing a wire having a large conductivity and a good spring property, and wound in a coarsely wound coil shape so that adjacent portions are not in contact with each other; A contact portion 54b formed by extending one end of the coil winding portion 54a and bending the end portion into a substantially closed curve so as to make the torsion spring 54a, and another end portion of the coil winding portion 54a. Terminal portion 5 formed by extending
4c. Then, in order to function as a torsion spring, the coil winding portion 5 of the contact 54 is used.
4a is accommodated in a state of being urged by a contact accommodating portion 55 or 56 formed in the housing 50.

As shown in FIGS. 3A to 3E, the housing 50 has a substantially rectangular parallelepiped outer shape. The housing 50 is provided with a plurality of two types of contact receiving portions 55, 56. These contact receiving portions 55,..., 56,. , 5
6a are formed in a shape penetrating toward the lower surface. The contact winding portions 54a,... Of the contacts 54,.

The above two types of contact accommodating portions 55 and 56
The contact protrusions 55a and 56a are formed to have lengths L ₁ and L ₂ (L ₁ > L ₂ ) in the longitudinal direction. From the contact protrusions 55a and 56a, the contact 5
The contact portions 54b, 54b of the 4, 54 project movably in the longitudinal direction.

On one wall surface of the wide opposing walls of the contact accommodating portions 55 and 56, spring guides 55b and 56b projecting toward the other wall surface are formed, and the end faces of the spring guides 55b and 56b are formed. The distance from the other wall is
The contact protrusions 55a and 56a are formed slightly longer than the length in the short direction.

On the outer surface of the upper wall of the housing 50, positioning projections 58 are projected. On the inner surface of the upper wall of the housing 50, the contact accommodating portion 55,
The positioning protrusions 60 facing the reference numeral 56 are formed. On the outer surface of the short side wall of the housing 50,
Wide guide grooves 61 and 63 are formed.
Locking projections 62, 62 are formed on the bottom surface of 63.
A through hole 6 communicating with the contact accommodating portions 55,..., 56,.
4, ..., 64, ... are formed.

The cover 52 is engaged with the housing 50 to close the lower surface (bottom surface) of the housing 50. As shown in FIGS. 4A to 4C, a bottom plate is provided. 66, and guide plates 68, 70 projecting upward from both short sides of the bottom plate 66.
The guide plates 68 and 70 are provided in the guide grooves 6 of the housing 50.
1, 63 are formed.

On the upper part of the bottom plate 66 of the cover 52, the contact accommodating portions 55,.
The spring holding ribs 72, which fit loosely in the projections, are provided in a protruding manner.
The remaining portion (for example, two turns) is formed so as to be able to move downward.

Guide grooves 74 are formed at both longitudinal sides of the bottom plate 66 of the cover 52 to guide the terminal portions 54c of the contacts 54 to project to the lower surface. A positioning portion 76 for positioning on a substrate or the like is formed below the bottom plate 66. A guide plate 68 of the cover 52;
Lock holes 78, 78 for locking with the lock protrusions 62, 62 of the housing 50 are formed in 70.

Next, the operation of the above embodiment will be described with reference to FIGS.
The explanation will be made in conjunction with the above. First, the assembly will be described. With the housing 50 turned upside down, the coil winding portions 54a,... Of the contacts 54,. At this time, the coil winding portion 54
are assembled in a state of being contracted in the central axis direction (that is, in a contracted state) within a range where the adjacent portions do not come into contact with each other.

Next, while engaging the guide plates 68 and 70 of the cover 52 with the guide grooves 61 and 63 of the housing 50, FIG.
(A), the cover 52 is engaged and inserted into the lower surface side of the housing 50, and the spring pressing rib 72 of the cover 52,
Are loosely fitted in the contact accommodating portions 55,..., 56,.

Next, the cover 52 is moved upward to lock the locking projections 62, 62 of the housing 50 in the locking holes 78, 78 of the guide plates 68, 70. As shown. At this time, one side of the upper part of the coil winding part 54a of the contact 54 is guided by the spring guide 55c (or 56c) of the housing 50, and one side of the lower part of the coil winding part 54a is formed by the tip of the spring pressing rib 72 of the cover 52. Since the contact 54 is pressed and the other side of the side of the coil winding 54a is supported by the inner wall surface of the housing 50, the contact 54 is guided to a predetermined position in the housing 50, and the coil winding 54a is connected to the spring guide 55c (or 56
c), the spring holding rib 72 and the inner wall surface of the housing 50 are supported and fixed.

As shown in FIG. 6B, the coil winding portions 54a of the contacts 54 are in contact with each other in a state where the adjacent portions are not contacted and are shrunk in the central axis direction.
, 56, ..., and the contact portions 54b,... Of the contacts 54,.
a, protruding length H ₁ from ..., ..., H _2, together with the protruding with _{... (H 1> H 2)} , contact spout 55a, ..., 56a,
, And are urged to receive an initial spring force due to the torsional stress of the coil windings 54a,.

FIG. 6C shows the housing 50a as shown in FIG.
This shows a comparative example in which the spring guide 56b (or 55b) as shown in (a) and (b) is not formed. In this case, the coil winding of the contact 54 is performed by the spring pressing rib 72a of the cover 52a. This indicates that when the portion 54a is pressed, the coil winding portion 54a is not guided to a predetermined position in the housing 50a and may be crushed.

Next, the operation when the connector plug according to the present invention is connected to the corresponding connector socket will be described. For example, as shown in FIG. 5, by mounting a detachable small-sized video camera 10 at a predetermined position on the video adapter 12, the connector socket 16 provided on the video camera 10 is connected to the connector plug 18 provided on the video adapter 12. The description will be made on the assumption that the two are connected by pressing and contacting each other.

At this time, as shown in FIGS. 1A and 1B, the contact portions 5 of the contacts 54 of the connector plug are formed.
4b, ... of, the longitudinal length L ₁ is greater contact projection port 55a, the contact portion 54b projecting from ..., ...
Protruding length H ₁ of the longitudinal length L ₂ is smaller contact projection hole 56a, the contact portion 54b projecting from ..., ...
Because of greater than the projecting length H _2, the former is in contact against the contact portion of the corresponding contact of the connector socket before the latter. For example, the contact on the ground side is connected first, and the contact on the power supply side or signal side is connected later, thereby preventing the occurrence of electrical inconvenience.

The coil winding portion 54a of the contact 54
Of the housing 50, only a part (one turn) of the spring guide 55b (or 56b) of the housing 50 and the inner wall surface and the cover 52
, And the remaining portion (two turns) is twistable and slidable. For this reason, when one device (for example, a video camera) is placed on the other device (for example, an adapter) and receives the contact pressure P from the connector socket of one device, the contact 54 is changed to the state shown in FIGS. The state changes from the state shown to the state shown in FIG.

That is, the contact portion 54b of the contact 54
The contact pressure (that is, the load) P applied to the coil is dispersed into a torsional stress Ft for twisting the coil winding 54a and a sliding stress Fs for sliding the coil winding 54a. For this reason,
The total load at the time of initial operation of the multi-pole connector plug can be reduced. Therefore, the initial pressure applied to the connector socket connected to the multipolar connector plug can be reduced, and the initial pressure applied to one device (for example, a video camera) can be reduced.

In particular, the direction of the contact pressure P applied to the contact portion 54b of the contact 54 and the arm portion 54 of the contact 54
When the angle Θ formed by the direction of d is made an acute angle, the component force acting as a torsional moment on the coil winding portion 54a becomes small, and the total load at the time of the initial operation of the multi-pole connector plug is further reduced. The initial pressure applied to the connector socket connected to the multipolar connector plug can be further reduced.

That is, FIGS. 8A and 8B show a comparative example with respect to the case where the pressure at the time of the initial movement is relaxed. The coil winding portion 54a of the contact 54 is entirely (three turns). The contact pressure (that is, the load) P applied to the contact portion 54b of the contact 54 is supported by the columnar support body 57 and the support step 59, and prohibits sliding movement in a direction perpendicular to the central axis. Only the torsional stress for twisting the coil winding part 54a is obtained. For this reason, the total load at the time of the initial operation of the multipolar connector plug is increased. In the case of a multi-pole connector plug having a large number of poles, the total load applied to a connector socket connected to the multi-pole connector plug at the time of initial movement becomes too large, and a large force is applied to one device (for example, a video camera) provided with the connector socket. The burden increases.

Since the coil winding portion 54a of the contact 54 is formed in a non-contact rough winding state at an adjacent portion, current input and output from the contact portion 54b of the contact 54 passes through all the windings of the coil winding portion 54a. Through to the terminal portion 54c,
Input and output are performed from the terminal 54c. Therefore, the conductor resistance of the contact 54 can be stabilized, and the contact resistance value of the contact 54 including the conductor resistance can be stabilized.

That is, FIG. 8C shows a comparative example in which the above-mentioned contact resistance value is stabilized. The coil winding portion 53a of the contact 53 is formed in a tightly wound state in which adjacent portions are in contact with each other. Therefore, the current input from the contact portion 53b of the contact 53, as shown by the arrow X,
The coil 53a passes through a portion of the coil winding portion 53a where the contact resistance is low to reach the terminal portion 53c, and outputs from the terminal portion 53c. Therefore, the conductor resistance of the contact 53 becomes unstable, and the contact resistance value of the contact 53 including the conductor resistance becomes unstable.

In the above embodiment, a spring guide for guiding the contact is provided on the inner wall surface of the contact accommodating portion of the housing, and the coil winding portion of the contact is guided to a predetermined portion of the contact accommodating portion by pressing the spring pressing rib of the cover. do it,
Although the step of positioning and assembling the contact at a predetermined position in the contact accommodating portion can be reduced, the present invention is not limited to this, and can be used even when a spring guide or a spring pushing rib is not provided.

In the above embodiment, a part (for example, one turn) of the coil winding part of the contact is supported, and the remaining part (two turns) is not supported, and the contact pressure P applied to the contact part is applied to the coil winding part. The total load at the time of initial movement is reduced by dispersing the twisting torsional stress Ft and the sliding stress Fs for sliding the coil winding. However, the present invention is not limited to this. It can also be used when supporting all of the above.

In the above embodiment, the coil winding portion of the contact is formed in a rough winding state to stabilize the conductor resistance of the contact and stabilize the contact resistance value. However, the present invention is not limited to this. It can also be used when the coil winding of the contact is formed in a tightly wound state.

[0033]

As described above, the multipolar connector plug according to the present invention comprises a housing, a plurality of contacts, and a cover, and a contact accommodating portion is provided with an elongated contact projecting opening opened on the upper surface of the housing. A contact is formed by penetrating toward the lower surface, and a contact is formed by extending and winding one side end of the coil winding to make the coil winding a torsion spring. And the contact winding portion is supported by the housing and the cover, and the contact portion of the contact is projected to the outside from the contact projection of the housing, so that the following effects are obtained.

(1) The contact of the connector plug has a coil winding portion formed by winding a wire into a coil for forming a torsion spring, so that a sufficient spring length can be achieved without increasing the external dimensions of the contact. Can be obtained. Therefore, the contact reliability can be improved without increasing the size of the contact, and the connector plug can be reduced in size. (2) A precise mold is not required for forming the contacts of the connector plug, and the number of components is minimized, so that the cost can be reduced.

(3) Since there is no sliding contact portion between metals such as a spring pin, it is possible to eliminate an unstable factor in performance due to a change in contact resistance. (4) Since the movement of the contact point moves not in a straight line like a spring pin but in an arc shape, it has a self-cleaning action,
A stable contact can be obtained.

(5) In the case where a plurality of contact protrusions are formed with two types having different lengths in the longitudinal direction, the length of the contact portion of the contact protruding from the housing is set to two types of length. Therefore, a contact having a different contact timing (for example, a ground contact and a signal or power contact) can be formed by one type of contact. For this reason, the types of components can be reduced, the number of management steps can be reduced, and assembly errors (incorporation of wrong types of contacts) can be prevented.

[Brief description of the drawings]

1A and 1B show an embodiment of a multi-pole connector plug according to the present invention, wherein FIG. 1A is a cross-sectional view taken along line AA of FIG.
Is a sectional view taken along line BB of (c), (c) is a plan view of (a),
(D) is a main part of the CC section enlarged sectional view of (a).

2 (a) is a front view and FIG. 2 (b) is a right side view of FIG. 1 (a), showing the contact of FIG.

3A and 3B show the housing of FIG. 1, wherein FIG. 3A is a front view, FIG. 3B is a plan view of FIG. 3A, and FIG. 3C is DD of FIG.
(A) is a right side view when sectioned at a line position, (d) is an EE sectional view of (b), and (e) is a main part of an FF line sectional view of (b).

4A and 4B show the cover of FIG. 1, wherein FIG. 4A is a cross-sectional view taken along line GG of FIG. 1B, FIG. 4B is a plan view of FIG. It is a right side view of (a) when it cross section at the line position.

FIG. 5 is an explanatory diagram illustrating a state in which detachable devices are connected using the connector plugs shown in FIGS. 1 to 4;

6 (a) is a cross-sectional view of a main part showing a state during assembly in which the cover is locked to the housing, and FIG. 6 (b) is a state in which the cover has been locked to the housing. Sectional view of the main part showing the state, (c) is (a), (b)
FIG. 9 is a reference diagram for comparison with FIG.

7 (a) is a perspective view illustrating a stress applied when a contact pressure P is applied to a contact portion of a contact, and FIG. 7 (b) is a perspective view illustrating a stress applied to the contact portion of the contact. Sectional drawing of the principal part showing a state just before pressure P is applied, (c).
FIG. 4 is a cross-sectional view of a main part showing a state immediately after a contact pressure P is applied to a contact portion of the contact.

FIGS. 8A and 8B are diagrams illustrating an operation of a general contact formed in a torsion spring shape, and FIG. 8A is a perspective view illustrating a main part in a state where the contact is supported by a columnar support (for example, a metal core). (B) is a perspective view showing a main part in a state where the contact is supported by a supporting step, and (c) is a perspective view showing a state in which a current flows through a close-wound contact.

FIG. 9 is an explanatory diagram illustrating a state in which devices are connected using a connector that is connected by insertion fitting according to a conventional example.

[Explanation of symbols]

Reference numeral 50: housing, 52: cover, 54: contact, 54a: coil winding part of the contact 54, 54b: contact part of the contact 54, 55, 56: contact accommodating part, 55a, 56a: contact protrusion, 55b, 5
6b ... spring guide, 72 ... Baneosae ribs, L _1, L ₂ ...
Longitudinal length of the contact projection port, the protruding length of the contact portion of the H _1, H ₂ ... contact 54.

Claims (2)

(57) [Claims] A housing provided with a plurality of contact housing portions, a contact housed in the contact housing portion of the housing, and a cover for closing the lower surface of the housing by engaging with the housing. The contact receiving portion penetrates a long hole-shaped contact protrusion opening on the upper surface of the housing toward the lower surface, and the contact has a coil winding portion formed by winding a wire in a coil shape; A contact portion formed by extending and bending one end of the coil winding portion so that the portion becomes a torsion spring. The coil winding portion of the contact is supported by the housing and the cover, and the contact of the contact is formed. A multi-pole connector plug, characterized in that the portion protrudes outside from a contact protrusion of the housing. 2. The multi-pole connector plug according to claim 1, wherein the plurality of contact accommodating portions formed in the housing have at least two types of long and short lengths of the contact protrusions in the longitudinal direction.