JP3299469B2 - Optical connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical connector used for connection between optical fibers or between an optical fiber and a photoelectric conversion element.

[0002]

2. Description of the Related Art As a conventional optical connector having a ferrule attached to an end of an optical fiber, for example, Japanese Utility Model Application Laid-Open No.
What is described in -126204 is publicly known. In this optical connector, a hay for housing a ferrule is divided into upper and lower parts, and a housing groove for housing the ferrule is formed in a lower housing. The upper and lower housings are fixed to each other by screwing in such a state that the ferrule is sandwiched from both the upper and lower sides in the housing groove so as to be retained and retained. Also,
A helical spring is mounted on the outer peripheral portion of the ferrule so as to urge the retained and held ferrule toward its distal end.

[0003]

However, in the above-mentioned conventional optical connector, since the upper and lower housings are fixed by screws, screwing work is required at the time of assembling the optical connector, which increases the number of assembly steps. However, there is a problem that it takes time to assemble. In addition, there is a problem that screws and nuts are required, which increases the number of parts.

In view of the above problems, an object of the present invention is to provide an optical connector that can be assembled easily and quickly with a reduced number of parts.

[0005]

The technical means for achieving the above object is an upper part which accommodates a ferrule attached to an end of an optical fiber and a biasing means for biasing the ferrule in the direction of its tip. A connector body that has a receiving recess that opens to the connector recess, and retains and holds the ferrule in a state where the tip of the ferrule projects from one wall of the receiving recess; and a connector body that closes the opening of the receiving recess. An optical connector comprising a connector cover attached to the optical connector,
A fixing pin for fixing the connector cover is protruded from one of the connector cover and the connector body, and a fixing hole into which the fixing pin is press-fitted is provided on the other of the connector cover and the connector body. The hole is continuous with the opening on the inlet side of the fixing hole and has a small diameter portion whose inner diameter is smaller than the outer diameter of the fixing pin,
A fixed diameter portion having a large diameter portion connected to the small diameter portion via a step portion and having an inner diameter equal to or larger than the outer diameter of the fixed pin; the tip portion of the pin beyond the small diameter portion so as to protrude by a predetermined length in the large diameter portion, is set, the receiving
Deflection displacement at the bottom wall of the connector body forming the recess
Forming possible cantilever locking means,
Press the fixing pin into the fixing hole and close the connector cover.
When the lock means is mounted on the connector body,
The closing projection for closing the gap generated around
It is provided on the connector cover . Also,
Technical means for achieving the above object has a receiving recess that opens upward to receive a ferrule attached to an end of an optical fiber and a biasing unit that biases the ferrule in a tip direction thereof, The connector body includes a connector body that retains and retains the ferrule in a state where the tip of the ferrule projects from one wall portion of the housing recess, and a connector cover that closes the opening of the housing recess and is attached to the connector body. In the optical connector, a fixing pin for fixing the connector cover is protruded from one of the connector cover and the connector body, and a fixing hole into which the fixing pin is press-fitted is formed on either the connector cover or the connector body. On the other side, on the inner side of the side wall forming the housing recess of the connector body, the upper end surface of the side wall may be provided.
A position advanced downward by the thickness of the connector cover
The regulating step portion which exits collision inwardly provided in this regulation step portion
The connector fits inside the opening of the housing recess
Before forming the housing recess by regulating the insertion amount of the cover
The cantilever shape that can be flexed and displaced to the bottom wall of the connector body
A lock means is formed, and the connector cover is
Fix the fixing pin until it comes into contact with the regulating step
Press the connector cover into the hole to secure the connector cover to the connector body.
The gap created around the lock means when attached to the
A closing projection for closing is provided on the connector cover.
And wherein the digit. Further, the technical means for achieving the above object has an accommodation recess which opens upward to accommodate a ferrule attached to an end of the optical fiber and an urging means for urging the ferrule in a tip direction thereof. A connector body for retaining and retaining the tip of the ferrule from a wall on one side of the housing recess, and a connector cover attached to the connector body by closing the opening of the housing recess. In the optical connector comprising: fixing pins for fixing the connector cover at three locations of the connector cover; and fixing holes into which the respective fixing pins are press-fitted at corresponding three locations of the connector body. And the connector forming the housing recess
Cantilever locking means that can be bent and displaced to the bottom wall of the body
And press-fit the fixing pin into the fixing hole.
And attach the connector cover to the connector body.
The gap around the locking means in the closed state
The connector cover is provided with a closing protruding portion for the purpose . Preferably, the fixing hole is
As the inside diameter moves away from the inlet end, the fixed pin
From a value larger than the outer diameter of the
It is preferable that the tapered shape is formed. Further
In addition, the technical means for achieving the above object is an optical fiber.
The ferrule attached to the end of the bar and the ferrule
Opening upward to accommodate biasing means for biasing in the distal direction
A front side of a wall on one side of the recess.
Hold the ferrule with the tip protruding.
A connector body, and closing the opening of the housing recess.
And a connector cover attached to the connector body.
Optical connector, the connector cover fixing
Fixing pin of the connector cover or connector body
While projecting to one of said fixed pins pressure inlet
Insert the fixing hole into the connector cover or connector body.
The fixing hole is provided on one of the other
The inner diameter of the fixed pin
A small diameter portion smaller than the outer diameter and a step portion
And the inner diameter is equal to or larger than the outer diameter of the fixed pin.
A large-diameter portion, and the length of the fixing pin and the small-diameter portion
The front end of the fixing pin pressed into the fixing hole has a front end.
Projects a predetermined length beyond the small diameter part and into the large diameter part
The fixing hole is set so that the connector cover
Or a cylinder protruding from one of the connector bodies
Shaped by a mounting boss, the tip of said mounting boss
The mounting boss so that it is split vertically in the radial direction.
It is characterized in that a split groove is provided at a constant depth. Ma
Preferably, the connector forming the housing recess
Cantilever locking means that can be bent and displaced to the bottom wall of the body
And press-fit the fixing pin into the fixing hole.
And attach the connector cover to the connector body.
The gap around the locking means in the closed state
Is provided on the connector cover for the
Good.

[0006]

[0007]

[0008]

[0009]

[0010]

[0011]

[0012]

FIG. 1 is an exploded perspective view of an optical connector 1 according to a first embodiment of the present invention, and FIG. 2 is a perspective view of the optical connector 1 as viewed from a bottom side. This optical connector 1
Is a ferrule 3 attached to the end of the optical fiber 2,
A helical spring 4 (biasing means) disposed on the outer periphery of the ferrule 3, a connector housing 7 including a connector body 5 and a connector cover 6 for housing and holding the ferrule 3 and the spring 4, and a connector housing 7 And a boot 8 attached to the rear end side. In FIG. 1, the boot 8 is omitted.

The connector body 5 and the connector cover 6 are integrally formed of a synthetic resin. As shown in FIG. 3, the housing recess 11 for housing the ferrule 3 and the spring 4 is provided in the connector body 5.
Two connecting cylinders 13 for connecting the optical connector 1 to an adapter or the like are protrudingly provided on the distal end side of the end wall portion 12 on the distal end side forming the housing recess 11. The housing recess 11 is open on the upper and rear end sides, and the upper opening is closed by the connector cover 6. A positioning projection 14 for positioning the ferrule 3 and a fixing hole 15 described later
Are provided. In the accommodation recess 11 thus formed, two sets of ferrules 3 and springs 4 are accommodated on both sides of the positioning projection 14 and the mounting boss 16 in a state of being arranged side by side.

On the inner side of the left and right side walls 17 and 18 forming the housing recess 11, a regulating step projecting inward at a position advanced from the upper end by the thickness of the connector cover 6 downward. Portions 19 are respectively formed.

Further, three fixing holes 15, 21, 21 for fixing the connector cover 6 are formed in the connector body 5.
2 are provided. The mounting boss 16 that forms the fixing hole 15 protrudes upward from the bottom wall 23 at a slightly rear end side from the center in the accommodation recess 11, and is fixed to the fixing hole 21, 22.
Are provided at the distal ends of the regulating steps 19 provided on the side walls 17 and 18 on the left and right sides, respectively, so that the fixing holes 15, 21 and 22 are located at the apexes of the triangle. .

The bottom wall 23 of the connector body 5 is provided with a lever lock 24 for maintaining the connection state when the optical connector 1 is connected to an adapter or the like. The lever lock 24 includes a lock arm 24a.
And a locking portion 24b. The positioning protrusion 14 is formed in a cantilever shape so as to extend in the distal direction from a portion of the bottom wall portion 23 closer to the distal end than the mounting boss 16, and has a frame shape. It is provided inside. Further, the lock arm portion 24a protrudes toward the distal end beyond the end wall portion 12, and after being bent upward at the end wall portion 12, further bent toward the distal end side. The lever lock 24 is connected to the operation unit 2 provided on the lock arm 24a.
4c can be flexed upward by pressing or the like.

By forming such a lever lock 24, the connector body 5 is provided with the lock arm 2
A gap S is formed around the periphery of the connector 4a, and a protrusion 25 for closing the gap described later is provided on the connector cover 6 in order to close the gap S.

As shown in FIGS. 4 and 5, the connector cover 6 has three fixing pins 26, 27, 28 having a cylindrical shape on the inner surface side and the projecting portion 25 having a frame shape. It has a substantially flat shape, and has an outer shape that fits exactly into the opening above the housing recess 11 of the connector body 5.

The three fixing pins 26, 27, 28 are formed in the fixing holes 15, 2 provided at three places of the connector body 5.
The fixing pins 26, 27, and 28 are respectively provided at positions corresponding to the fixing holes 1 and 22, respectively.
The connector cover 6 is fixed to the connector body 5 by press-fitting the connector cover 5 into the connector body 5.

Here, the fixing holes 15, 21, 22 penetrate from the upper surface of the mounting boss 16 or the regulating step portion 19 to the bottom surface of the connector body 5, respectively.
As shown in the example of the fixing hole 15, the inner diameter A1 at the upper end is larger than the outer diameter B of the corresponding fixing pin 26, 27, 28, and the inner diameter A2 at the lower end is larger than the outer diameter. It is formed in a tapered shape so as to be smaller than the diameter B. Thus, the fixing pins 26, 27 and 28 are completely inserted into the fixing holes 15, 21 and 22 when a pressing force of 5N or more is applied, and cannot be completely inserted with a pressing force of less than 5N. It has become. In addition, the distal ends of the fixing pins 26, 27, 28 and the fixing holes 15, 2
The upper ends, which are the entrance-side ends of the first and second 22, are fixed pins 26,
It is chamfered so that insertion of 27 and 28 is smooth.

The protruding portion 25 is provided from the center of the inner surface of the connector cover 6 to the edge on the front end side so as to face the positioning protruding portion 14 of the connector body 5. When the connector cover 6 is attached to the connector body 5, the lower end surface of the projection 25 comes into contact with the upper end surface of the positioning projection 14, as shown in FIG. Will be closed. This prevents dust and dirt from entering the connector housing 7 through the gap S.

The side surface on the distal end side of the connector cover 6 has a tapered surface 31 which is inclined inward as it advances from the outer edge to the inner surface so that the connector cover 6 can be smoothly mounted. I have. Here, only the side surface on the distal end side of the connector body 6 is a tapered surface, but the side surfaces on both the left and right sides may also be tapered surfaces.

To mount the ferrule 3 on the connector body 5, the ferrule 3 is inserted into the housing recess 11, and the distal end of the ferrule 3 is inserted into a through hole (not shown) provided in the end wall 12 and a connection cylinder. 13, and is made to protrude from the distal end portion of the connection tubular portion 13. When the ferrule 3 is attached, the connector cover 6 is attached to the connector body 5.

The mounted connector cover 6 has inner surfaces on both sides in contact with the regulating step portion 19, a protruding portion 25 of the connector cover 6, and an inner surface around the fixing pin 26 abutting on the mounting boss 16. The connector cover 6 is supported so as not to be excessively fitted in the accommodation recess 11 at three places, that is, at both sides and at the center. The spring 4 is held in a compressed state between a flange 3a formed on the outer periphery of the ferrule 3 and spring stoppers 32 and 33 provided on the connector body 5 and the connector cover 6, respectively. The spring 4 urges the ferrule 3 toward its distal end.

Boots 8 made of synthetic resin or the like
Has a tubular shape, and is attached to the rear end of the connector housing 7 so as to close the opening on the rear end side of the housing recess 11 when the optical fiber 2 is inserted therethrough. The fixing of the boot 8 to the connector housing 7 is performed by providing a locking portion for fixing the connector housing 7 and the boot 8 or by using an adhesive.

With the above configuration, the fixing pins 26, 27,
Since the connector cover 6 is fixed to the connector body 5 by press-fitting the connector cover 28 into the fixing holes 15, 21 and 22, no screws or the like are required for fixing, the number of parts is reduced, and the optical connector 1 is assembled. Can be done easily and quickly.

Further, by forming the fixing holes 15, 21, 22 in a tapered shape as described above, the fixing pins 26, 27, 28 are prevented from being broken at the time of press-fitting, and the press-fitting is facilitated. be able to.

Further, the inner surface of the connector cover 6 comes into contact with the regulating step 19, the positioning projection 14 and the mounting boss 16 of the connector body 5, and the insertion amount of the connector cover 6 is regulated. Even when the optical connector 1 is press-fitted with pressure, it is possible to prevent the optical connector 1 from being damaged due to excessive press-fitting, and to always fix the connector cover 6 to the connector body 5 at a fixed insertion position.

The fixing pins 26, 2 provided at three places are provided.
Since the connector cover 6 is assembled to the connector body 5 by the fixing holes 7, 28 and the fixing holes 15, 21, 22, the connector cover 6 can be firmly fixed to the connector body 5.

Further, since the gap S is closed by the projecting portion 25 provided on the connector body 5, it is possible to prevent dust and the like from entering the inside of the connector housing 7.

Further, since the side surface on the distal end side of the connector cover 6 is formed as a tapered surface 31, the peripheral portion on the distal end side of the connector cover 6, particularly the edge on the distal end side of the protruding portion 25, is attached to the connector cover 6 when the connector cover 6 is mounted. Interference with the body 5 can be prevented from being difficult.

Further, since the fixing holes 15, 21, 22 penetrate from the upper surface of the mounting boss 16 or the regulating step 19 to the bottom surface of the connector body 5, the fixing holes 15, 21, 22 are provided.
The connector pins 6 can be easily removed by extruding the fixing pins 26, 27, 28 press-fitted from the bottom of the fixing holes 15, 21, 22.

FIG. 8 shows a modification of the fixing pin 26 provided in the optical connector 1 of the present embodiment, and the corresponding portions are denoted by the same reference numerals. This fixing pin 26a
It is formed in a tapered shape, and the outer diameter of the tip is set to be equal to the outer diameter B of the fixing pin 26. In this manner, by forming both the fixing pin 26a and the fixing hole 15 in a tapered shape, the fixing pin 26a can be more easily press-fitted and hardly come off. Here, only the modification of the fixing pin 26 is shown, but the other fixing pins 27 and 28 may be similarly formed in a tapered shape.

In this embodiment, the connector cover 6
Although the fixing pin and the fixing hole are provided in the connector body 5, the fixing hole may be formed in the connector cover 6 and the fixing pin may be formed in the connector body 5.

Further, in this embodiment, the boot 8 is formed as a separate component from the connector body 5 and the connector cover 6, but may be formed integrally therewith. Alternatively, the boot 8 may be omitted, and in this case, it is desirable to close the opening on the rear end side of the connector body 6 except for the portion where the optical fiber 2 is inserted.

FIG. 9 is an exploded perspective view of an optical connector 1a according to a second embodiment of the present invention. Optical connector 1 of the present embodiment
a is a step 51 on the inner peripheral surface of the fixing holes 15, 21, 22.
The other parts are the same as those of the above-described optical connector 1 except for the point where the optical connector 1 is provided (see FIG. 10) and the point where the split groove 52 is provided at the tip of the mounting boss 16, and the corresponding parts are the same. And the description is omitted.

In the present embodiment, each of the fixing holes 15, 21, 2,
2, a small-diameter portion 53 extending downward from openings on the entrance side of the fixing holes 15, 21, 22 and a lower portion of the small-diameter portion 53 as shown in FIG. It has a large diameter portion 54 connected through the step portion 51, and has a stepped shape whose inside diameter is increased stepwise at a position inward from the opening on the inlet side by a predetermined length L2. I have.

The inner diameter A3 of each small diameter portion 53 is set to a value smaller than the outer diameter B of the corresponding cylindrical fixing pin 26, 27, 28, and the inner diameter A4 of each large diameter portion 54 corresponds. The value is set to a value equal to or larger than the outer diameter B of the fixing pins 26, 27, and 28, and here, a value larger than the outer diameter B is set.

The length L1 of each of the fixing pins 26, 27, and 28 and the length L2 of each of the small-diameter portions 53 along the insertion direction.
As shown in FIG. 12, when the fixing pins 26, 27 and 28 are pressed into the corresponding fixing holes 15, 21 and 22, as shown in FIG.
6, 27, and 28 are set to values that protrude into the large-diameter portion 54 by a predetermined length L3 (preferably 0.5 mm or more) beyond the small-diameter portion 53. That is, the length L2 of each small-diameter portion 53 is equal to the length of each fixing pin 26, 27, 28.
Is shorter than the length L1 by the length L3.

The angle θ between the large-diameter end face 51a of the step portion 51 of each of the fixing holes 15, 27 and 28 and the inner peripheral surface 53a of the small-diameter portion 53 is set to 100 ° or less, and 90 ° in the illustrated example. I have.

FIG. 11A is a plan view of the mounting boss 16, and FIG. 11B is a side view thereof. At the tip of the mounting boss 16, a split groove 52 is formed with a predetermined depth C so that the mounting boss 16 is divided into two along the radial direction so that the fixing pin 26 can be easily pressed and removed. ing. Here, the depth C of the split groove 52 is set to approximately half the length L2 of the small diameter portion 53 of the fixing hole 15 so that the fixing pin 26 can be easily removed.

When the fixing structure for fixing the connector cover 6 by press-fitting the fixing pin into the fixing hole is adopted, the fixing pin press-fitted into the fixing hole always receives side pressure from the inner wall of the fixing hole. It will be. For this reason,
If the fixing pin is used for a long time in a bad environment such as a high temperature, the outer diameter of the portion where the fixing pin is subjected to the side pressure becomes small due to the side pressure, and the fixing pin may fall out of the fixing hole (natural decomposition). is there.

Therefore, in this embodiment, the fixing pins 26,
When the fixing holes 27, 28 are pressed into the fixing holes 15, 21, 22, the distal ends 55 of the fixing pins 26, 27, 28 are brought into contact with the fixing holes 15, 27, as shown in FIG. The large diameter portion 54 passes through the small diameter portions 53 of 21 and 22.
The fixing pins 26, 27, 2
The side pressure P is always applied to the portion located inside the small diameter portion 53 of the reference numeral 8, but the side pressure P is not applied to the tip portion 55.

Therefore, as shown in FIG. 13, the outer diameter B of the portion of the fixing pin 26, 27, 28 located in the small-diameter portion 53 due to long-term use at a high temperature, as shown in FIG. Is smaller due to the lateral pressure P, the outer diameter B of the tip 55 remains the same, and the tip 55 serves as a stopper to prevent the fixing pins 26, 27, and 28 from coming off.
Does not spontaneously decompose. FIG. 14 is a view showing a state where the fixing pin 26 in the state of FIG. 13 is removed from the fixing hole 15.

According to this embodiment, the same effects as those of the first embodiment, such as the need for screws and the like for fixing, the number of parts is reduced, and the assembling of the optical connector 1a can be performed easily and quickly. And fixing holes 15, 21,
Steps 51 are provided in the fixing pins 26, 27, 28.
The side pressure P is always applied to the portion located within the small diameter portion 53 of the above. However, since the side pressure P is not applied to the tip portion 55, it is used for a long time in a bad environment such as a high temperature. Also, the fixing pins 26, 27, 28 are
2 can be prevented from coming off naturally or due to vibration, etc., and the assembled state of the connector cover 6 can be reliably maintained.

The large-diameter end face 51a of the step portion 51 of each of the fixing holes 15, 21, 22 and the inner peripheral surface 5 of the small-diameter portion 53 are formed.
Since the angle θ between the fixing pins 26, 27, and 28 is set to 100 ° or less, even if the body of the fixing pins 26, 27, and 28 becomes thinner due to the side pressure P as shown in FIG.
8, the tip 55 is securely hooked on the step 51, so that the fixing pins 26, 27, 28 can be reliably prevented from coming off.

Further, since the split groove 52 is provided at the tip of the mounting boss 16, the split groove 52 is opened when the fixing pin 26 is press-fitted and removed, and the fixing hole 15 in the portion where the split groove 52 is formed is formed. The inner diameter of the fixing pin 26 is appropriately enlarged, so that the fixing pin 26 can be easily pressed and removed.

[0048]

As described above, claims 1 , 2, 3 and
According to the fifth aspect of the present invention, the connector cover is fixed to the connector body by press-fitting the fixing pin into the fixing hole, so that screws and the like for fixing are not required, the number of parts is reduced, and the optical connector is reduced. Assembly can be performed simply and quickly.

According to the fourth aspect of the present invention, since the fixing hole is formed in a tapered shape, it is possible to prevent the fixing pin from breaking at the time of press-fitting and to facilitate the press-fitting.

Further, according to the first and fifth aspects of the present invention, the fixing hole is continuous with the opening on the inlet side of the fixing hole, and has a small-diameter portion whose inner diameter is smaller than the outer diameter of the fixing pin. A large-diameter portion connected to the portion via a step portion and having an inner diameter equal to or larger than the outer diameter of the fixing pin, wherein the length of the fixing pin and the diameter of the small-diameter portion are fixedly pressed into the fixing hole. The tip of the fixing pin is set so as to protrude by a predetermined length into the large-diameter portion, so that the portion located in the small-diameter portion of the fixing pin press-fitted into the fixing hole, that is, the torso portion extends from the inner wall of the fixing hole. Side pressure is always applied, but it is possible to prevent side pressure from being applied to the tip of the fixing pin,
Even if the fixing pin is used for a long time at a high temperature or the like and the outer diameter of the body of the fixing pin becomes smaller due to the lateral pressure, the outer diameter of the tip of the fixing pin can be kept as it is.

As a result, even if the body of the fixing pin becomes thin due to long-term use at high temperatures or the like, the tip of the fixing pin acts as a stopper and is caught by the step in the fixing hole, whereby the fixing pin is The fixing pin is prevented from coming off, and the fixing pin can be prevented from coming off naturally or due to vibration or the like, and the assembled state of the connector cover can be reliably maintained.

According to the fifth aspect of the present invention, since the split groove is provided at the tip of the mounting boss, the split groove is opened when the fixing pin is press-fitted and removed, and the split groove is formed. The inner diameter of the fixing hole in the portion is appropriately enlarged, so that the fixing pin can be easily press-fitted and removed.

Further, according to the second aspect of the present invention, the insertion amount of the connector cover is regulated by the regulating step of the connector body. It is possible to prevent the optical connector from being damaged by passing the connector cover, and the connector cover can always be fixed to the connector body at a fixed insertion position.

Further, according to the third aspect of the present invention, since the connector cover by fixing pins and the fixing holes provided at three positions is assembled to the connector body, it is possible to firmly secure the connector cover to the connector body .

Further, according to the first, second, third and sixth aspects of the present invention, the gap around the locking means is closed by the projection provided on the connector body, so that dust and the like enter the inside. Can be prevented.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an optical connector according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the optical connector of FIG. 1 as viewed from a bottom surface side.

FIG. 3 is a plan view of a connector body constituting the optical connector of FIG. 1;

FIG. 4 is a plan view of the connector cover constituting the optical connector of FIG. 1 as viewed from the inside.

FIG. 5 is a side view of the connector cover.

FIG. 6 is a cross-sectional view illustrating a configuration of a fixing pin and a fixing hole provided in the optical connector of FIG. 1;

FIG. 7 is a cross-sectional view of the connector housing showing a state where the connector cover is mounted on the connector body.

FIG. 8 is a sectional view showing a modification of the fixing pin of FIG. 6;

FIG. 9 is an exploded perspective view showing an optical connector according to a second embodiment of the present invention.

FIG. 10 is a sectional view showing a configuration of a fixing pin and a fixing hole provided in the optical connector of FIG. 9;

11 (a) is a plan view of a mounting boss provided on the optical connector of FIG. 9, and FIG. 11 (b) is a side view thereof.

FIG. 12 is a cross-sectional view showing a state where the fixing pin of FIG. 10 is pressed into a fixing hole.

13 is a cross-sectional view showing a state in which the outer diameter of the body of the fixing pin in FIG. 12 is reduced by lateral pressure from the inner wall of the fixing hole.

14 is a cross-sectional view showing a state where the fixing pin of FIG. 13 has been removed from the fixing hole.

[Explanation of symbols]

 1, 1a Optical connector 2 Optical fiber 3 Ferrule 4 Spring 5 Connector body 6 Connector cover 11 Housing recess 12 End wall 15 Fixing hole 16 Mounting boss 17, 18 Side wall 19 Regulatory step 21 22, Fixing hole 24 Lever lock 25 Projection Part 26, 26a, 27, 28 Fixing pin 51 Step part 52 Split groove 53 Small diameter part 54 Large diameter part

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kazuki Sogabe 1-3-1 Shimaya, Konohana-ku, Osaka Sumitomo Electric Industries, Ltd. (56) References JP-A-3-276582 (JP, A) JP-A Heihei 6-59156 (JP, A) JP-A-61-126204 (JP, U) JP-A-57-177749 (JP, U) JP-A-3-79486 (JP, U) US Patent 4,233,724 (US, A) ( 58) Field surveyed (Int.Cl. ⁷ , DB name) G02B 6/40 G02B 6/38

Claims (6)

(57) [Claims] 1. A storage recess which opens upward to receive a ferrule attached to an end of an optical fiber and a biasing means for biasing the ferrule in a tip direction thereof. An optical connector, comprising: a connector body that retains and retains the ferrule in a state where a tip end portion of the ferrule projects from a wall portion; and a connector cover that is attached to the connector body by closing the opening of the housing recess. A fixing pin for fixing the connector cover protrudes from one of the connector cover and the connector body, and a fixing hole into which the fixing pin is press-fitted is provided on the other of the connector cover and the connector body. A small-diameter portion connected to the opening on the inlet side of the fixing hole and having an inner diameter smaller than the outer diameter of the fixing pin, and a step portion formed on the small-diameter portion. A large-diameter portion whose inner diameter is equal to or larger than the outer diameter of the fixing pin, and the length of the fixing pin and the small-diameter portion is such that the distal end of the fixing pin press-fitted into the fixing hole has the small diameter. the beyond part so as to protrude by a predetermined length in the large diameter portion, is set in the bottom wall portion of the connector body forming the accommodation recess
Forming cantilever locking means capable of bending displacement
Press-fitting the fixing pin into the fixing hole,
With the cover attached to the connector body,
Closure projection to close the gap created around the locking means
An optical connector, wherein a portion is provided on the connector cover . 2. An accommodation recess which is open upward to accommodate a ferrule attached to an end of an optical fiber and an urging means for urging the ferrule in a tip direction thereof. An optical connector, comprising: a connector body that retains and retains the ferrule in a state where a tip end portion of the ferrule projects from a wall portion; and a connector cover that is attached to the connector body by closing the opening of the housing recess. A fixing pin for fixing the connector cover protruding from one of the connector cover and the connector body, and a fixing hole into which the fixing pin is press-fitted is provided on the other of the connector cover and the connector body; Of the side wall portion forming the accommodation recess of
On the inner surface side, connect the connector cover from the upper end surface of the side wall portion.
Regulations to be out collision inward only of thick minute position advanced to the downward
A step portion is provided, and the regulating step portion is
The insertion amount of the connector cover that fits inside the opening is regulated.
The connector recess forming the housing recess.
Forming cantilever locking means capable of bending displacement
Until the connector cover comes into contact with the regulating step.
Press the fixing pin into the fixing hole with
With the bar attached to the connector body,
Closing projection for closing the gap created around the means
Is provided on the connector cover . 3. An accommodation recess which opens upward to accommodate a ferrule attached to an end of an optical fiber and an urging means for urging the ferrule in a tip direction thereof. An optical connector, comprising: a connector body that retains and retains the ferrule in a state where a tip end portion of the ferrule projects from a wall portion; and a connector cover that is attached to the connector body by closing the opening of the housing recess. the fixing pin of the connector cover for fixing together to project at three positions of the connector cover, provided with the fixing hole in which each fixing pin is press-fitted to the position of the corresponding three of said connector body, to form the accommodating recess On the bottom wall of the connector body
Forming cantilever locking means capable of bending displacement
Press-fitting the fixing pin into the fixing hole,
With the cover attached to the connector body,
Closure projection to close the gap created around the locking means
An optical connector, wherein a portion is provided on the connector cover . 4. The fixing hole according to claim 1, wherein an inner diameter of the fixing hole is an end on an inlet side.
Larger than the outer diameter of the fixing pin
Taper so that the outer diameter is smaller than the outer diameter
4. The method according to claim 2, wherein
Optical connector as described. 5. A ferrule mounted on an end of an optical fiber.
And a biasing means for biasing the ferrule in the direction of its tip.
A housing recess that opens upwardly for housing the housing recess.
The tip of the ferrule projects from the wall on one side of the part.
Connector body for retaining and retaining
Close the opening of the recess and attach it to the connector body
An optical connector having a connector cover , wherein a fixing pin for fixing the connector cover is connected to the connector cover.
When protruding from either the bar or the connector body
In both cases, the fixing hole into which the fixing pin is
The fixing hole is provided on one of the other of the cover and the connector body, and the fixing hole is connected to an opening on the entrance side of the fixing hole.
Both small diameter parts whose inner diameter is smaller than the outer diameter of the fixed pin
With the small diameter part via a step, and the inner diameter is
A large-diameter portion that is equal to or larger than the outer diameter of the fixing pin;
The length of the fixed pin and the small diameter part is press-fitted into the fixing hole.
When the tip end of the fixed pin exceeds the small diameter portion,
The fixing hole is set so as to protrude by a predetermined length into the diameter portion, and the fixing hole is provided in the connector cover or the connector body.
With a cylindrical mounting boss protruding from one of the
The mounting boss is attached to the tip of the mounting boss.
Split grooves at a specified depth so that they are split vertically in the radial direction.
An optical connector characterized by being provided. 6. A cantilever-shaped locking means that can be bent and displaced is formed on a bottom wall portion of the connector body that forms the housing recess, and the fixing pin is pressed into the fixing hole.
The connector cover to the connector body
6. The optical connector according to claim 5 , wherein a closing protrusion for closing a gap formed around the locking means in the state is provided on the connector cover.