JP2509081Y2 - Cable connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a connector for a cable such as an optical fiber cable, and more particularly to a cable connector having a clamp means for preventing axial movement of the cable with respect to the connector housing. It is a thing.

(Prior Art) As a cable connector provided with this type of clamping means, the one disclosed in Japanese Utility Model Publication No. 62-17772 is known, in which the clamp member for holding the cable in the connector housing is In addition to the legs for holding the cable by engaging with the surface of the connector (biting in), a retaining mechanism for locking the clamp member to the connector housing so that the clamp member itself does not come out of the connector housing is provided. It is equipped.

(Problems to be solved by the invention) Therefore, the clamp member and the housing must have projections and locking claws for engaging with each other.
Not only is the structure complicated and the cost is high, but it is difficult to provide the projection and the locking claw particularly in the case of a small clamp member.

An object of the present invention is to provide a cable connector provided with means for effectively fixing the clamp member itself to the housing without providing the retaining mechanism as described above.

(Means for Solving the Problems) According to the present invention, a housing having a through hole through which a cable penetrates in the front and rear surfaces thereof and a slot having a slot extending in a direction intersecting with the through hole on a side surface thereof, and entering into the slot from the outside. And a clamp member having a clamp leg that bites into a coating layer of the cable, the clamp leg is formed to have a constant thickness, and the slot along the thickness direction of the clamp leg is provided. Is formed so as to be partially narrower than the thickness of the clamp leg portion.

(Operation and effect) In the cable connector of the present invention, the width of the slot along the thickness direction of the leg of the clamp member is partially narrower than the thickness of the leg. The clamp member is press-fitted into the narrow portion, and the press-fitting causes the elasticity of the housing to hold the clamp member in the housing.

Therefore, since the retaining member can be retained as it is without providing a retaining mechanism separately, the structure is simple and the cost can be kept low, and a compact clamping member having no locking portion is provided. It is suitable for cable connectors and enables further miniaturization of cable connectors.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

1 and 2 show an embodiment in which the cable connector of the present invention is applied to a plastic optical fiber cable. The optical fiber cable 2 is a core wire portion having a double structure of a core and a clad with a coating 21 such as a nylon coat.
The cable 2 covers the connector 22 and allows the cable 2 to pass through a through hole 40 formed in the connector housing 4 in the front-rear direction. The cable connector includes a connector housing 4 (see FIG. 1a) through which the cable 2 is passed, and a surface of the cable 2 inside the housing 4, that is, a covering portion 21, engages the cable 2 to the housing 4. The housing 4 is composed of a clamp member 6 (see FIG. 1b) to be held against the housing 4, and the housing 4 has slots 41, 41 for advancing the leg portions 61 of the clamp member 6 from the outside into the housing at right angles to the through hole 40. Have

In the embodiment shown in FIGS. 1 and 2, the clamp member 6 is formed by connecting a pair of leg portions 61 having an opening portion 62 for holding the cable 2 by a connecting portion 63. The opening portions 62, 62 are housings. The taper portions 62a, 62a are provided on the inner side so that when the cable is inserted into the four slots 41, 41, the cable 2 inside can be easily bitten into the covering portion 21.

As a result, as shown in FIG. 2 in an enlarged manner, the clamp member 6 inserts its leg portion 61 into the housing 4 from the slot 41 so that the taper portion 62a inside the opening portion 62 of the leg portion 61 becomes a cable. The second coating portion 21 bites into the coating portion 21, and the inner edge of the opening 62 above it also bites into the coating portion 21 to fix the cable 2 in its axial direction. The clamp member 6 itself is inserted into the slot 41 of the housing 4 and positioned, so that the cable 2 is fixed to the housing 4 immovably in the axial direction. If the width of the clamp member 6 is set to be substantially the same as the length of the slot 41, the clamp member 6 can be fixed immovably also in the direction perpendicular to the axis. The inner surface of the housing 4 has a wall surface adjacent to the outer edge of the leg portion 61 of the clamp member 6, and when the clamp member 6 is inserted into the slot 41 and the leg portion 61 bites into the covering portion 21 of the cable 2, the leg portion It acts as a guide to prevent 61 from spreading outward. In addition, a support portion 42 that supports the cable 2 so as not to sag downward when the clamp member 6 is inserted into a portion of the slot 41 that is below the through hole 40.
Is provided. That is, the cross section of the slot 41 is the second
As shown in the figure, the shape is such that the meat of the housing is left below the through hole 40.

In the present invention, in order to prevent the clamp member 6 from coming off easily from this state, the thickness d of the leg portion 61 of the clamp member 6 as shown in FIG. The width D of the slot 41 at the center
In 41a and 41b, the thickness is made larger than the thickness d of the leg portion 61 and constant, taper 41c is provided near both ends to make it smaller than the thickness d of the leg portion 61, and d> D near this both ends, and the clamp member 6 is press-fitted. The leg 61 is fixed to the slot 41 of the housing 4 so as not to come off easily.

The relationship between the thickness d of the leg portion 61 and the width D of the slot 41 is
The center of the slot 41 may be narrowed (that is, the width D may be reduced), and it suffices that the portion where d> D is relatively present is at least a part of the slot 41. Another embodiment thus constructed is shown in FIG. Here, the thickness d'of the leg portion 61 is constant, and the slot 41 'of the housing 4'has a curved portion 41b' to reduce the width D'in the center.

The entire slot 41 may be narrower than the thickness of the leg portion 61.However, depending on the material, the force for press-fitting may become too large at the time of insertion and workability may be reduced. Therefore, it is preferable that d> D.

The shape of the clamp member 6 is such that the inner edge portion of the opening 62 of the leg portion 61 as shown in FIGS.
The diameter of the clamp member 7 may be narrower than the diameter of 21 and wider than the diameter of the core wire portion 22 and may not be parallel. For example, the leg portion of the clamp member 7 in FIG.
Like in 71, the opening has a gentle taper 72a, and has a shape that spreads outward continuously to the steep taper portion 72b below it.Furthermore, the outer edge of the leg 71 is parallel to the upper portion 71a and the lower portion 71b. When the clamp member 7 is press-fitted into the slot 41 of the housing 4, the lower portion 71b of the leg portion 71 is guided inward by the taper 41d when the clamp member 7 is press-fitted into the slot 41 of the housing 4. Narrow and taper 72 inside
You may make it a cut into the coating part 21 of the cable 2. (See FIG. 6) The clamp member 7 of the embodiment shown in FIGS. 5 and 6 can be used instead of the clamp member 6 shown in FIGS. 1 and 2. Change the length slightly and reduce the thickness of the legs 61,71 of both clamp members 6,7 to about half.
You may use it one by one. In this way, it is possible to further increase the holding power of the cable by using two sheets in a stacked manner.

FIG. 7 and FIG. 8 show an example in which the clamp members 8 and 9 are one-piece type without a connecting portion, and the clamp member 8 has a leg portion 81.
Has an opening 82 whose lower portion is tapered 82a. In the clamp member 9, the leg portion 91 has a parallel portion 92a above the inner edge, a lower portion has a taper portion 92b, and an upper portion above the outer edge has a parallel portion 91a, and the lower portion is the inner side. It is a taper portion 91b to the.

As shown in FIGS. 7 and 8, even in the case of one clamp member 8 and 9, the thickness of the clamp member 8 and 9 is made larger than the width of the slot of the housing at least partly, so that the effect of holding and fixing the cable can be obtained. Can play. In this case, the structure is further simplified, workability at the time of assembly is improved, and it is extremely advantageous in terms of manufacturing cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a cable connector according to the present invention, (a) showing a connector housing and (b) showing a clamp member. FIG. 2 is a cross-sectional view showing the state of assembly of FIG. 1, FIG. 3 is a plan view thereof (however, cables are not shown), FIG. 4 is a plan view showing a different embodiment, and FIG. , FIG. 6 is a sectional view showing a further different embodiment, and FIGS. 7 and 8 are perspective views showing a clamp member in a further different one-sheet embodiment. 2 …… (optical fiber) cable 4 …… Housing 6,7,8,9 …… Clamping member 21 …… Coating 41,41 ′ …… Slot 61,71,81,91 …… Leg

Claims (1)

(57) [Scope of utility model registration request] 1. A housing having through-holes through which a cable penetrates and front and rear surfaces, and a slot having a slot extending on a side surface in a direction intersecting with the through-hole, and entering into the slot from the outside and biting into a coating layer of the cable. A cable connector including a clamp member having a clamp leg portion, wherein the clamp leg portion is formed to have a constant thickness, and the width of the slot along the thickness direction of the clamp leg portion is set to the clamp leg portion. The cable connector is formed to be partially narrower than the above thickness.