CN110174727A - A kind of tail portion sheath and the connector using the tail portion sheath - Google Patents

Abstract

The present invention provides a kind of tail portion sheath and use the connector of the tail portion sheath, tail portion sheath of the invention includes body, the front end of body has the linkage section for connecting with connector shell, it is equipped with circumferentially closed deformable transition annular groove in the position close to linkage section on the endpiece of body, deformable transition annular groove provides deformation space when covering intracorporal cable by lateral force for the lateral deformation of endpiece.Since deformable transition annular groove is circumferentially closed, then deformation space can be provided when with cable lateral deformation occurs for the endpiece of body regardless of lateral force of the cable by which kind of direction, guarantee that the deformability of lateral deformation in a circumferential direction is consistent.

Description

A tail sheath and a connector using the tail sheath

technical field

The invention relates to a tail sheath and a connector using the tail sheath.

Background technique

With the rapid development of communication and information technology, fiber optic connectors are used more and more widely in people's lives, and various types of fiber optic connectors such as SC, FC, and LC have also been derived. As disclosed in the Chinese utility model patent with the authorized announcement number CN202472060U and the utility model name being a new type of SC fiber optic connector, the fiber optic connector generally includes a housing and a tail sheath installed at the tail of the housing, and the optical cable from the tail sheath The middle of the housing penetrates into the housing, and is connected with the pins in the housing and fixed relative to the housing, and the front end of the housing is used for plugging connection with an adapted connector. Wherein, the tail sheath of the optical fiber connector is used to protect the optical cable at the tail of the housing. However, when the optical fiber connector disclosed in the above-mentioned utility model patent is in use, when the optical cable is subjected to lateral tension, because the lateral bending resistance of the tail sheath is relatively large, the maximum bending deformation of the optical cable is mostly located at the tail end of the tail sheath , and it is easy to cause the cable bending radius to be smaller than the minimum bending radius required by the specification.

Aiming at such problems, the prior art also provides various solutions, for example, the authorized announcement number is CN201936034U, and the utility model name is a Chinese utility model patent for a sheath of an SC-type optical fiber active connector suitable for 0.9-diameter optical cables. A tail sheath is disclosed, the front end of the tail sheath has a connection section connected to the housing, and a mesh hollow square hole is provided on the tail section to provide a buffer space for the bending of the optical cable, so that when the optical cable is subjected to When the force is pulled laterally, the tail sheath can easily bend and deform to a certain extent along with the optical cable, so that the deformation of the optical cable at the tail of the optical fiber connector is relatively smooth. However, the two hollow square holes closest to the housing on the tapered tail section of this tail sheath are symmetrically arranged and circumferentially discontinuous, so when the direction of the optical cable subjected to lateral tension is facing the hollow square holes, the tapered tail The section is relatively easy to deform. When the direction of the lateral pulling force on the optical cable is facing the sleeve part between the two hollow square holes, the sleeve part will be squeezed and will hinder the deformation of the tapered tail section. Therefore, this This kind of tail sheath has inconsistent deformation ability when the optical cable is subjected to lateral tension in different directions, and the use effect is not good.

Contents of the invention

The purpose of the present invention is to provide a tail sheath with uniform deformation ability when the cable is subjected to lateral pulling force in different directions; at the same time, the invention also provides a connector suitable for the tail sheath.

In order to achieve the above object, the tail sheath of the present invention includes a sleeve body, the front end of the sleeve body has a connecting section for connecting with the connector housing, and a circumferentially closed seal is provided on the tail section of the sleeve body at a position close to the connecting section. The deformation transition ring groove provides deformation space for the lateral deformation of the tail section when the cable in the casing is subjected to lateral tension. Since the deformation transition ring groove is circumferentially closed, no matter what direction the cable is subjected to lateral tension, it can provide a deformation space when the tail section of the sleeve deforms laterally with the cable, ensuring lateral deformation in the circumferential direction same deformability.

Further, in addition to being provided with a deformed transition ring groove on the tail section of the sleeve body, at least one depth direction extends radially along the sleeve body, the opening is radially outward, and the length is perpendicular to the rear side of the deformed transition ring groove. Give way to the axis of the casing. The setting of the relief groove ensures the deformation ability of the part of the tail section located behind the groove of the deformation transition ring, so that the cables inside can be deformed smoothly.

When setting the relief grooves, preferably, there are more than two relief grooves arranged in groups, each group of relief grooves includes at least one pair of single grooves, and the two grooves contained in the same pair of single grooves are related to the sleeve body Axisymmetric setting. Such a set of relief slots ensures the deformation of the tail section in two opposite directions.

When the relief grooves are arranged in groups, at least one set of relief grooves includes two pairs of U-shaped grooves, and the groove length directions of the two pairs of U-shaped grooves are perpendicular to each other, so that the same group of relief grooves ensures that the tail section in the four directions perpendicular to each other can deform.

When the relief grooves are arranged in groups, there can be at least two groups of relief grooves, and at least two groups of relief grooves are staggered in the circumferential direction of the tail section, which further improves the deformation ability of the tail section of the sleeve body in any direction of the circumference.

The circumferentially staggered setting of each set of relief grooves can preferably make each set of relief grooves cover the tail section of the sleeve body in the circumferential direction, which is more conducive to maintaining the same deformation ability of the tail section of the sleeve body in any direction of the circumference .

Considering that the farther the cable is from the front end of the casing, the greater the degree of deformation, so on the basis of any of the above schemes, the relief grooves can be evenly spaced in the axial direction of the tail section, and each gives way from front to back The groove depth of the groove increases sequentially, and the distance from the bottom of the groove to the axis of the tail section decreases in order, so that the deformation capacity of the tail section of the casing can be increased from front to back. In the same way, the groove width of the give way groove can be further increased sequentially from the front to the rear.

In addition, the tail sheath of the present invention further limits the tail section of the sheath body to a conical shape that gradually shrinks from front to back, and the use of a conical tail section further improves the deformation ability of the rear end of the tail section.

The sleeve body is made of elastically deformable plastic materials such as TPE, TPV or TPU, so that the sleeve body has a certain hardness and elasticity, and the deformation buffering effect is better when the cable is subjected to lateral tension.

The connector of the present invention includes a housing and a tail sheath installed at the rear end of the housing. The tail sheath has a threading channel for cables to pass through the housing from the rear to the front. The tail sheath includes a sleeve body, and the front end of the sleeve body has a It is used to connect the connecting section with the connector shell. The tail section of the sleeve is provided with a circumferentially closed deformed transition ring groove near the connecting section. Provide deformation space for lateral deformation of the tail section. Since the deformation transition ring groove is circumferentially closed, no matter what direction the cable is subjected to lateral tension, it can provide a deformation space when the tail section of the sleeve deforms laterally with the cable, ensuring lateral deformation in the circumferential direction same deformability.

Further, in addition to being provided with a deformed transition ring groove on the tail section of the sleeve body, at least one depth direction extends radially along the sleeve body, the opening is radially outward, and the length is perpendicular to the rear side of the deformed transition ring groove. Give way to the axis of the casing. The setting of the relief groove ensures the deformation ability of the part of the tail section located behind the groove of the deformation transition ring, so that the cables inside can be deformed smoothly.

When setting the relief grooves, preferably, there are more than two relief grooves arranged in groups, each group of relief grooves includes at least one pair of single grooves, and the two grooves contained in the same pair of single grooves are related to the sleeve body Axisymmetric setting. Such a set of relief slots ensures the deformation of the tail section in two opposite directions.

When the relief grooves are arranged in groups, at least one set of relief grooves includes two pairs of U-shaped grooves, and the groove length directions of the two pairs of U-shaped grooves are perpendicular to each other, so that the same group of relief grooves ensures that the tail section in the four directions perpendicular to each other can deform.

When the relief grooves are arranged in groups, there can be at least two groups of relief grooves, and at least two groups of relief grooves are staggered in the circumferential direction of the tail section, which further improves the deformation ability of the tail section of the sleeve body in any direction of the circumference.

The circumferentially staggered setting of each set of relief grooves can preferably make each set of relief grooves cover the tail section of the sleeve body in the circumferential direction, which is more conducive to maintaining the same deformation ability of the tail section of the sleeve body in any direction of the circumference .

Considering that the farther the cable is from the front end of the casing, the greater the degree of deformation, so on the basis of any of the above schemes, the relief grooves can be evenly spaced in the axial direction of the tail section, and each gives way from front to back The groove depth of the groove increases sequentially, and the distance from the bottom of the groove to the axis of the tail section decreases in order, so that the deformation capacity of the tail section of the casing can be increased from front to back. In the same way, the groove width of the give way groove can be further increased sequentially from the front to the rear.

In addition, the connector of the present invention further restricts the tail section of the sleeve body to a conical shape that gradually shrinks from front to back, and adopting the conical tail section further improves the deformation ability of the rear end of the tail section.

The sleeve body is made of elastically deformable plastic materials such as TPE, TPV or TPU, so that the sleeve body has a certain hardness and elasticity, and the deformation buffering effect is better when the cable is subjected to lateral tension.

Description of drawings

Fig. 1 is the structural representation of the embodiment of SC optical fiber connector of the present invention;

Fig. 2 is the sectional view of B-B place in Fig. 1;

Fig. 3 is the structural representation of tail sheath of the present invention;

Fig. 4 is a cross-sectional view at A-A in Fig. 3 .

Detailed ways

Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

The connector of the present invention may be an electrical connector or an optical fiber connector. Here, the present invention is described by taking an SC optical fiber connector as an example.

The SC optical fiber connector of the present invention includes a housing and a tail sheath installed at the rear end of the housing. The optical cable passes through the threading channel in the middle of the tail sheath and protrudes forward into the housing to connect with the pins in the housing and Keep relatively fixed with the shell. Among them, the tail sheath is shown in Figures 3 to 4, including a sleeve body, which can be made of rubber materials such as TPE, TPV, or TPU, and has certain hardness and elasticity. The front end of the sleeve has a connecting section 10 , and an inner convex ring 12 is provided on the inner peripheral surface of the front end of the connecting section 10 , and is connected to the connector housing through the inner convex ring 12 . The sleeve body has a tail section 11 on the rear side of the connecting section. In this embodiment, the tail section 11 is preferably set to a conical shape that gradually shrinks from front to back. Of course, it is not limited to other shapes in other embodiments. Such as cylindrical or stepped column. The front end of the tail section 11 close to the connecting section 10 has a deformed transition ring groove 3, and the deformed transition ring groove 3 is closed in the circumferential direction so that when the optical cable outside the housing is subjected to lateral tension, the sleeve body tail section can be deformed from the transition ring groove. Lateral deformation begins to occur at the position, and no matter what direction the optical cable is subjected to lateral tension, the lateral deformation capacity of the tail section of the sleeve at the deformation transition ring groove remains the same.

On the rear side of the deformation transition ring groove 3, a relief groove is also provided on the tail section of the sleeve body. The depth direction of the relief groove extends radially along the sleeve body, the opening radially outwards, and the length is perpendicular to the axis of the sleeve body. There are a plurality of give way slots and they are arranged in groups, as shown in Figure 3, the give way slot group 2 includes two pairs of single slots 21, 22, and the same pair of single slots, that is, the single slot pair 21 and the single slot pair 22, both include two U-shaped groove, and the two U-shaped grooves included in the same pair of single grooves are symmetrical about the axis of the casing. The groove length directions of the two pairs of single grooves included in the relief groove group 2 are perpendicular, so that the same group of relief grooves ensures that the tail sections can be deformed in four directions perpendicular to each other.

Of course, in other embodiments, the set of relief slots includes a pair of single slots, such as the connector shown in Figures 1 to 2, including a housing 1 and a tail sheath installed at the rear end of the housing 1, and the optical cable passes through the middle of the tail sheath The threading channel 4 passes through and protrudes forward into the housing 1, is connected with the pin 19 in the housing 1 and remains relatively fixed with the housing. The tail section of the cover body of the tail sheath is also provided with seven relief groove groups on the rear side of the deformation transition ring groove 3, each relief groove group includes a pair of single grooves, and the single grooves of the adjacent two relief groove groups The groove length directions of the groove pairs are perpendicular to each other.

In the embodiment shown in Figures 3 to 4, there are four relief groove groups 2 and they are evenly spaced in the axial direction on the tail section. The distance to the axis of the tail section decreases in depth, and the groove width increases in sequence, and the relief grooves of the relief groove group on the rear side even communicate with the threading channel 4 . In this way, the closer the tail section is to the rear side, the stronger the deformability is, so that the optical cable located outside the casing makes a smooth transition when it is bent and deformed from the front to the rear. Of course, the number of relief groove groups is designed according to the length of the tail section of the casing, and in its implementation, it is not limited to four groups, but can be five groups, three groups, six groups, seven groups and eight groups.

On the basis of Embodiment 1, Embodiment 2 and Embodiment 3 of the connector can also be changed. As in Embodiment 2, the difference from Embodiment 1 is that in the direction from front to back, the The distance from the bottom of the groove of the relief groove of the groove group to the axis of the tail section decreases successively, and the groove width remains unchanged; in the third embodiment, the difference from the first embodiment is that in the direction from front to rear, let The slot widths of the step-off slots of the bit slot group increase sequentially, and the distance from the bottom of the slot to the axis of the tail section remains unchanged.

In addition, the present invention also provides the fourth embodiment of the connector. In the fourth embodiment, the relief groove group only includes one relief groove, and a plurality of relief groove groups are evenly spaced in the axial direction, and each relief groove group The circumferential positions of the relief grooves on the tail section are staggered. Preferably, the relief grooves of each relief groove group can be covered with the tail section of the casing in the circumferential direction, for example, two adjacent relief grooves The relief grooves of the group are staggered by a certain angle in the circumferential direction, such as 30°, 45° or 60°, so that the relief grooves of multiple relief groove groups can cover the tail section in the circumferential direction.

The present invention also provides a fifth embodiment of the connector. In the fifth embodiment, the set of relief grooves includes three relief grooves, and the three relief grooves are located on the same circumference and are staggered by 60° in the circumferential direction. Of course, a variety of implementations can be obtained by similar changes from the fifth embodiment, such as the set of relief grooves includes two or four relief grooves located on the same circumference, and the multiple relief grooves of the same relief groove group are in the circumferential direction Stagger a certain angle.

The present invention also provides a tail sheath, the specific structure of which is the same as that of the tail sheath in the embodiment of the above-mentioned connector, which will not be repeated here.

Claims (10)

1. a kind of tail portion sheath, including body, the front end of body has the linkage section for connecting with connector shell, feature It is to be equipped with circumferentially closed deformable transition annular groove in the position close to linkage section on the endpiece of body, deformable transition annular groove is covering Intracorporal cable is provided deformation space by lateral deformation when lateral force for endpiece.

2. tail portion sheath according to claim 1, characterized in that set on rear side of deformable transition annular groove on the endpiece of body There is at least one depth direction to radially extend along body, be open radially outward, length perpendicular to set body axis recessing groove.

3. tail portion sheath according to claim 2, characterized in that there are two the recessing grooves above and is arranged in groups, often Group recessing groove includes at least a pair of single slot, and two slots for being included with a pair of single slot are arranged about body axisymmetrical.

4. tail portion sheath according to claim 3, characterized in that at least one set of recessing groove includes two pairs of U-type grooves, two couples of U The flute length direction of type groove is perpendicular.

5. tail portion sheath according to claim 3, characterized in that recessing groove has at least two groups, and at least two groups recessing groove exists It is circumferentially staggered on endpiece.

6. tail portion sheath according to claim 5, characterized in that each group recessing groove is covered with the tail of body in a circumferential direction Section.

7. according to tail portion sheath described in Claims 2 or 3 or 4 or 5 or 6, characterized in that recessing groove is equal in the axial direction of endpiece Even interval setting, and the groove depth of each recessing groove successively increases, the distance of slot bottom to endpiece axis is sequentially reduced from front to back.

8. according to tail portion sheath described in Claims 2 or 3 or 4 or 5 or 6, characterized in that recessing groove is equal in the axial direction of endpiece Even interval setting, and groove width successively increases from front to back.

9. tail portion sheath according to claim 7, characterized in that recessing groove uniform intervals in the axial direction of endpiece are arranged, And groove width successively increases from front to back.

10. a kind of connector, including shell and it is mounted on the tail portion sheath of housing rear end, tail portion sheath has for cable from rear The intracorporal threading channel of shell is penetrated forward, and tail portion sheath includes body, and the front end of body has for connecting with connector shell Linkage section, characterized in that on the endpiece of body close to linkage section position be equipped with circumferentially closed deformable transition annular groove, become Shape transition annular groove provides deformation space when covering intracorporal cable by lateral force for the lateral deformation of endpiece.