MDC optical connector

Abstract

To provide a small-sized MDC optical connector in an optical connector capable of saving the labor of work at a low cost when removing the MDC optical connector from an adapter.SOLUTION: An MDC optical connector 100 includes: a holder 10 for storing ferrules 31 and 32; and a housing 20 for holding the holder 10 setting the ferrules 31 and 32. The MDC optical connector 100 further includes a lever 21 energized in a direction separating from the main body of the housing 20 using the tip part side of the ferrules 31 and 32 as a fulcrum and provided on at least one surface of the outer periphery having an approximately rectangular cross section of the housing 20. The lever 21 includes a claw member 22 fitting a claw housing hole 41 of an adapter 40 connecting the MDC optical connector 100.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an MDC optical connector. [Background technology]

[0002] The MDC connector by US Conec is known as a duplex type connector that can connect two optical connectors at the same time. The connector body of this MDC connector can be separated into a holder that holds and accommodates the ferrule and a housing that holds the holder, and the polarity can be switched by separating and reversing the two. A small MDC optical connector called MDC Jr. (trademark) has been developed by shortening the body length of this MDC connector.

[0003] This small MDC optical connector is not compatible with the MDC connector, and a dedicated adapter is provided (for example, see "MDC 4-Port Adapter MDC / MDC Jr." on page 4 of Non-Patent Document 1). (a) and (b) of FIG. 7 show an example of the dedicated adapter 40 described above, with the left end showing the insertion port of the MDC connector and the right end showing the insertion port of MDC Jr. (trademark). Also, reference numeral 41 in (a) and (b) of FIG. 7 shows a claw receiving hole 41 that engages with the lock claw 122 of MDC Jr. (trademark) shown in FIG. 18 (d). That is, when MDC Jr. (trademark) 100 is inserted into the adapter 40, the lock claws 122 protruding from both sides of an arch member 121 provided on the top plate of MDC Jr. (trademark) 100 engage with the claw receiving hole 41 of the adapter 40 to lock it. Hereinafter, MDC Jr. (trademark) will also be referred to as the MDC optical connector, and the reference numeral 100 will be added thereto.

[0004] In the MDC optical connector 100 described in the background art, the length of the holder and the housing are shortened, so that when the MDC optical connector 100 is properly attached to the adapter 40, almost the entire housing is accommodated in the adapter 40 (see FIG. 17(a)). For this reason, in order to remove the MDC optical connector 100 from the adapter 40, it is necessary to use a dedicated jig 200 (see FIGS. 17 and 18). Specifically, when a protrusion provided on one end of the dedicated jig 200 is inserted into the claw receiving hole 41 of the adapter 40 and the arch member together with the locking claw 122 is pushed downward, the locking claw 122 and the claw receiving hole 41 are disengaged, and the MDC optical connector 100 can be pulled out.

[0005] Here, the structure of the dedicated jig 200 will be explained in detail. As shown in FIGS. 17 and 18, the tip side of a gripping member 201 having a push-in portion 201a for the MDC optical connector 100 at its rear end is provided with an arm push-down member 202 having a protrusion 202a at its front end for pressing locking claws 122 protruding from both sides of the arch member 121 of the MDC optical connector 100, and an optical connector extracting member 203 having a claw portion 203a at its front end for engaging with a locking bar 123 protruding from the rear of the arch member 121 of the MDC optical connector 100. Thus, the dedicated jig 200 is configured to have a roughly Y-shape in side view by the gripping member 201, the arm push-down member 202, and the optical connector extracting member 203. Incidentally, since the MDC optical connector 100 can be pushed in manually, it is not necessarily required to provide the pushing portion 201a of the MDC optical connector 100 at the rear end of the gripping member 201.

[0006] However, this type of conventional MDC optical connector has the following various problems. (A) The locking claws 122 of the MDC optical connector 100, which engage with and disengage from the claw accommodating holes 41 of the adapter 40, are integrally formed with the arch member 121 whose both ends are fixed to the top plate of the MDC optical connector 100. Therefore, even if the arch member 121 is pressed from above with a weak force such as a finger, it cannot bend downward, and the locking claws 122 cannot be released from the claw accommodating holes 41 of the adapter 40.

[0007] 17 and 18, it was not possible to pull out the MDC optical connector 100 from the adapter 40. However, this dedicated jig 200 has a complex structure in which a gripping member 201, an arm push-down member 202, and an optical connector pull-out member 203 are provided in three directions, making it expensive and requiring the troublesome process of rotating the dedicated jig 200 and using the optical connector pull-out member 203 after using the arm push-down member 202.

[0008] That is, to explain the conventional structure and process in detail, when removing the MDC optical connector 100, it is structured so that it cannot be removed unless the MDC optical connector 100 is pulled out with an MDC optical connector (not Jr) inserted on the opposite side. With the MDC optical connector 100 inserted on the opposite side, when the protrusion 202a on the lower end of the arm push-down member 202 of the dedicated jig 200 is inserted into the claw receiving hole 41 provided on the top plate of the adapter 40, the MDC optical connector is slightly removed by the pushing force of the MDC optical connector on the opposite side, and the arch member 121 is lifted again. At this time, as shown in FIG. 17(e), the lock claw 122 is slightly displaced backward from the initial position.

[0009] In this way, the locking claws 122 maintain a state of being engaged with the inner surface of the top plate behind the claw receiving holes 41, so thereafter, the dedicated jig 200 is temporarily removed from the adapter 40, and the claw portions 203 of the optical connector removal member 203 of the dedicated jig 200 are pulled backward while engaging with the locking bars 123 of the MDC optical connector 150. As a result, as shown in Fig. 18(d), the MDC optical connector 100 is completely pulled backward from the adapter 40. [Prior art documents] [Non-patent literature]

[0010] [Non-Patent Document 1] US Conec, “MDC CONNECTOR SOLUTIONS”, [online], [Retrieved January 22, 2023], Internet〈URL:https: / / www.usconec.com / media / 1402 / mdc-brochure.pdf〉 Summary of the Invention [Problem to be solved by the invention]

[0011] Therefore, the present invention has been devised in consideration of the above-mentioned conventional deficiencies, and has an object to provide an MDC optical connector that enables the above-mentioned small-sized MDC optical connector to be manually removed from an adapter. [Means for solving the problem]

[0012] In order to solve the above-mentioned problems, the present invention provides an MDC (Mini Duplex Connector) optical connector comprising a holder for accommodating a ferrule and a housing for holding the holder with the ferrule set therein, characterized in that a lever is provided on at least one surface of the outer periphery of the housing having an approximately rectangular cross section, the lever being biased in a direction away from the housing body with the tip side of the ferrule as a fulcrum, and the lever is provided with a claw member that fits into a claw receiving hole of an adapter to which the MDC optical connector is connected.

[0013] The housing is characterized in that a recess is provided on a surface thereof facing the lever to ensure a desired amount of depression of the lever.

[0014] The lever is provided at its end with a head portion that exposes the lever so that it can be operated when the MDC optical connector is inserted into the adapter.

[0015] The housing is characterized in that it is made of an elastic member capable of biasing the lever in a direction away from the housing body.

[0016] The claw receiving hole of the adapter has at least a rear inner surface having a vertical wall surface that prevents the lever from moving rearward.

[0017] The adapter is characterized in that a fitting groove for the lever is formed on the back surface of the upper wall thereof, the fitting groove being slightly wider than the width of the lever and having a depth approximately equal to the plate thickness of the lever and the claw member.

[0018] The fitting groove is formed across the front-to-rear direction below the claw accommodating hole so as to connect in a straight line with the rear vertical wall surface of the claw member and the opposite front wall surface of the claw accommodating hole. Effect of the Invention

[0019] That is, the present invention provides an MDC (Mini Duplex Connector) optical connector including a holder for accommodating a ferrule and a housing for holding the holder with the ferrule set therein, a lever is provided on at least one surface of the outer periphery of the housing having a substantially rectangular cross section, the lever being biased in a direction away from the housing body with the tip end side of the ferrule as a fulcrum; The lever is provided with a claw member that fits into a claw receiving hole of an adapter to which the MDC optical connector is connected. The MDC optical connector and adapter can be attached and detached manually, which makes it easy to handle and extremely convenient, and by not requiring a dedicated tool and simplifying the work process, it is possible to reduce labor and costs, making it possible to provide an optimal MDC optical connector.

[0020] A recess for ensuring the amount of depression of the lever is provided on the surface of the housing facing the lever, To enable the upper position of a lever to be set low, and to enable the lever to be stably held without wobbling to the left and right when pressed.

[0021] A head portion is provided at the end of the lever to expose the lever so that the lever can be operated when the MDC optical connector is inserted into the adapter. This makes it easier to manually connect and disconnect the MDC optical connector and the adapter.

[0022] The housing is formed of an elastic member capable of biasing the lever in a direction away from the housing body, Since there is no need to provide a separate member for biasing the lever, the structure is simple and costs can be reduced.

[0023] At least the rear inner surface of the claw receiving hole of the adapter has a vertical wall surface that prevents the lever from moving rearward. When the claw member of the lever is locked in the claw receiving hole of the adapter, the lever is reliably prevented from being pulled out even if the lever is pulled strongly backward.

[0024] A fitting groove for the lever is formed on the rear surface of the upper wall of the adapter, the fitting groove being slightly wider than the width of the lever and having a depth substantially equal to the plate thickness of the lever and the claw member. The lever can be pushed in and pulled out smoothly and reliably without any deviation from side to side.

[0025] The fitting groove is formed across the front and rear directions below the claw accommodating hole so as to be in line with the rear vertical wall surface of the claw member and the front wall surface facing the rear vertical wall surface of the claw accommodating hole. The lever is fitted into the fitting groove of the adapter in a state where it is extended to the front of the claw accommodating hole, so that even the claw members protruding from both sides of approximately the middle of the lever can be securely fitted below the claw accommodating hole. [Brief description of the drawings]

[0026] [Figure 1] 1A and 1B show an MDC optical connector showing the best mode for carrying out the present invention, in which FIG. 1A is a perspective view seen from the front, and FIG. [Diagram 2] 1 is an exploded view for explaining the configuration and assembly method of an MDC optical connector. [Diagram 3] 1 shows the holder of an MDC optical connector, where (a) is a front view, (b) is a plan view, (c) is a side view, (d) is a bottom view, (e) is a rear view, and (f) is a cross-sectional view taken along the line AA of (b). [Figure 4] 1 shows the housing of an MDC optical connector, where (a) is a front view, (b) is a plan view, (c) is a side view, (d) is a bottom view, (e) is a rear view, and (f) is a B-B cross-sectional view of (b). [Diagram 5] 1 shows an assembled MDC optical connector, where (a) is a front view, (b) is a plan view, (c) is a side view, (d) is a bottom view, and (e) is a rear view. [Figure 6] FIG. 6 is an enlarged cross-sectional view taken along the line CC of FIG. 5(b). [Figure 7] 1A is a perspective view of the adapter as seen from the front, and FIG. 1B is a perspective view of the adapter as seen from the rear with the MDC optical connector inserted therein. [Figure 8] 1 is a side view showing a state before the MDC optical connector is inserted into the adapter. FIG. [Figure 9] 1A and 1B show the state in which the MDC optical connector is inserted into the adapter, where FIG. [Figure 10] This shows the process of locking the lever of the MDC optical connector into the claw receiving hole of the adapter, where (a) is an explanatory diagram of the claw member before locking, as seen from the back side of the upper wall of the adapter, (b) is an explanatory diagram of the claw member after locking, (c) is an FF cross-sectional view of Figure (a), and (d) is a GG cross-sectional view of Figure (b). [Figure 11] 8(a) is an enlarged cross-sectional view taken along line DD of FIG. 8(b), and FIG. 8(b) is an enlarged cross-sectional view taken along line EE of FIG. 8(b), showing an example of use in which the lever of the MDC optical connector is locked into the claw receiving hole of the adapter. [Figure 12] 12A and 12B show an example of use of the MDC optical connector in a state where the lever head is pressed down to release the lock, and (a) and (b) are enlarged cross-sectional views corresponding to FIG. 11. [Figure 13]13A and 13B are enlarged cross-sectional views corresponding to FIG. 12, showing an example of use in which the head of the lever of the MDC optical connector is slightly pulled out after the lever is unlocked. [Figure 14] 14A is a cross-sectional view taken along line HH in FIG. 11, (b) is a cross-sectional view taken along line II in FIG. 12, and (c) is a cross-sectional view taken along line JJ in FIG. [Figure 15] 1 shows the claw receiving hole of the adapter and the claw member of the lever, with (a) being an enlarged cross-sectional view showing the state in which the claw member is locked into the claw receiving hole, (b) being an enlarged cross-sectional view showing the unlocked state, and (c) being an enlarged cross-sectional view showing the state in which the lever has been slightly pulled out after being unlocked. [Figure 16] 15A is a cross-sectional view taken along line XX in FIG. 15, FIG. 15B is a cross-sectional view taken along line YY, and FIG. 15C is a cross-sectional view taken along line ZZ. [Figure 17] FIG. 1 is a diagram for explaining the operation of removing the MDC optical connector described in the background art from an adapter, where (a) is an explanatory diagram showing the state before the locking claw of the MDC optical connector is pressed using a special tool, (b) is an overall explanatory diagram showing the state after the locking claw has been pressed using the special tool, (c) is a partially enlarged view showing the state after the locking claw has been pressed using the special tool, and (d) is a partially enlarged view showing the state after the special tool has been removed and the pressure on the locking claw has been released. [Figure 18] FIG. 1 is a diagram for explaining the process of removing an MDC optical connector described in the background art from an adapter, in which (a) is an explanatory diagram showing the state before the MDC optical connector is removed using a special tool, (b) and (c) are explanatory diagrams showing the MDC optical connector in the middle of being removed, and (d) is an explanatory diagram showing the state after the MDC optical connector has been pulled out from the adapter. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

[0028] First, the basic configuration of the MDC optical connector 100 will be described. As shown in FIG. 2, the MDC optical connector 100 is generally composed of a holder 10 that accommodates a pair of ferrules 31, 32, and a housing 20 having a substantially rectangular cross section that holds the holder 10 and the pair of ferrules 31, 32 in pressure contact.

[0029] 3, the holder 10 is provided with upper and lower holes 12a, 12b for accommodating the pair of ferrules 31, 32. These holes 12a, 12b are formed with tapered portions that come into contact with support fittings 35, 36 that support the tips of the pair of ferrules 31, 32, and the pair of ferrules 31, 32 can be supported by the support fittings 35, 36, respectively, in a state in which they are oriented in the direction of an adapter 40 (see FIGS. 7 and 8).

[0030] 2 and 4, the housing 20 is provided with holes 26a, 26b for accommodating tubes 33, 34 of the optical cable. The diameters of the holes 26a, 26b on the holder 10 side are smaller than the diameters of the support fittings 35, 36 that support the tips of the pair of ferrules 31, 32. When the housing 20 is set in the holder 10, the pair of ferrules 31, 32 can be supported in the direction of the adapter 40.

[0031] 2, in the MDC optical connector 100 configured as described above, after tubes 33, 34 are passed through the rear of the housing 20, a pair of ferrules 31, 32 are fixed using the support fittings 35, 36. Then, both ferrules 31, 32 are inserted into holes 12a, 12b of the holder 10, respectively, and seated on the tapered portions. When the housing 20 is then moved toward the holder 10, the hole 11 provided in the arm portion 13 of the holder 10 engages with the protrusion 24 provided on the housing 20 side, and the connector is locked.

[0032] 1(a), (b), 2, 5 and 8, a lever 21 is integrally connected to a top plate 20A of the housing 20, and is biased in a direction away from the main body of the housing 20 with the tip ends of the pair of ferrules 31, 32 as a fulcrum. Two claw members 22 are provided on both sides of a middle position of the lever 21 at an interval that fits into the claw receiving hole 41 of the adapter 40.

[0033] A head 23 for gripping is provided at the end of the lever 21. As shown in Figs. 9(a), (b), 10(b) and 11, the head 23 is slightly exposed rearward from the adapter 40 even when the MDC optical connector 100 is locked to the adapter 40. Furthermore, a recess 25 for ensuring the amount of depression t1 (width that can be depressed) of the lever is provided on the surface of the top plate 20A of the housing 20 facing the lever 21 (see Figs. 4, 6 and 11(b)). The depth of the recess 25 determines the amount of depression t1 (width that can be depressed) of the lever 21.

[0034] Specifically, the pushing amount t1 (the width that can be pushed down) of the lever 21 is set to be equal to or greater than the height t2 of the surface of the claw member 22 that abuts against the claw receiving hole 41 (see FIG. 15(a)). Therefore, when a user uses the head 23 to push down the lever 21 sufficiently, the claw member 22 comes out of the claw receiving hole 41 of the adapter 40, and this makes it possible to pull out the MDC optical connector 100 from the adapter 40. Therefore, in comparison with the MDC optical connector 100 described in the background art, the MDC optical connector 100 of this embodiment does not require the dedicated jig 200 shown in FIGS. 17 and 18 when removing it from the adapter 40.

[0035] The holder 10 and the housing 20 can be separated by opening the arm portion 13 of the holder 10 to the left and right and releasing the engagement between the hole 11 of the holder 10 and the protrusion 24 of the housing 20. The polarity can also be changed by reattaching the pair of ferrules 31, 32. The holder 10 and the housing 20 are preferably made of resin molded products. However, in a more preferable embodiment, it is preferable to select a material having elastic properties that can bias a lever 21 (described later) in a direction away from the housing 20 body as the resin.

[0036] Next, the configuration of the adapter 40 that is compatible with the MDC optical connector 100 of the above-mentioned form will be described in detail.

[0037] As shown in Figures 7(a), (b), Figure 8, Figures 9(a), (b), Figures 10(a), (b), (c), and Figures 11(a), (b) through Figures 14(a), (b), (c), the adapter 40 is formed of an adapter body 43 having a rectangular cross section and having insertion holes 42 for the MDC optical connector 100 at both the front and rear ends, and an upper wall 43a of the adapter body 43 is provided with a plurality of (three in this embodiment) horizontally elongated rectangular claw accommodating holes 41 at equal intervals, into which the claw members 22 of the lever 21 engage, and two partition wall guide plates 44 are vertically disposed on the underside of the upper wall 43a so as to be positioned between the three claw accommodating holes 41, and a fitting groove 42A for the lever 21 is formed in the center of the two partition wall guide plates 44 on the back surface of the upper wall 43a.

[0038] The claw accommodating hole 41 has at least a rear inner surface thereof a vertical engagement surface 41a which reliably and firmly prevents the lever 21 from moving rearward when the rear end of the claw member 22 of the lever 21 is latched thereto.

[0039] The fitting groove 42A communicates with the upper side of the insertion hole 42 of the MDC optical connector 100, is slightly wider than the width of the lever 21, and has a depth approximately equal to the plate thickness of the lever 21 and the claw member 22.

[0040] The fitting groove 42A is formed across the claw accommodating hole 41 in the front-rear direction so as to communicate in a straight line with the rear of the claw accommodating hole 41 (vertical locking surface 41a) and the front wall surface opposing thereto.

[0041] Incidentally, the three claw receiving holes 41 are opened at equal intervals in both side walls 43b of the adapter body 43 and in the upper wall 43a between the two bulkhead guide plates 44, whereby the adapter 40 of this embodiment has three parallel insertion holes 42 for the MDC optical connectors 100. In this manner, the adapter 40 of this embodiment is formed so that the MDC optical connectors 100 can be inserted and connected in triplet, but it goes without saying that the number of insertion holes 42 may be any other number, single or multiple.

[0042] An example of the use of the MDC optical connector 100 in this embodiment will now be described.

[0043] First, a procedure for inserting the MDC optical connector 100 of this embodiment into the adapter 40 will be described. When the MDC optical connector 100 of this embodiment is inserted into the insertion hole 42 of the adapter 40, the lever 21 is pushed down by the lower surface of the inner upper wall 43a of the adapter 40. When the MDC optical connector 100 is further pushed in, the lever 21 fits into the fitting groove 42A formed on the back surface of the upper wall 43a of the adapter 40, and the two claw members 22 on both sides of the lever 21 fit below the claw receiving hole 41 of the adapter 40, whereby the MDC optical connector 100 is locked to the adapter 40 (see FIGS. 9(a), (b) to 10(a), (b), (c) and 11(a) and (b)).

[0044] Next, a procedure for removing the MDC optical connector 100 of this embodiment from the adapter 40 will be described.

[0045] 11(a), (b), FIG. 14(a), FIG. 15(a) and FIG. 16(a) show a state in which the MDC optical connector 100 is locked to the adapter 40. In FIG. In other words, the locking members 22 protruding from both sides of the lever 21 of the MDC optical connector 100 are locked to the vertical engagement surfaces 41a at the rear of the claw receiving holes 41 of the adapter 40, so that the MDC optical connector 100 cannot be pulled out of the adapter 40 even if the head 23 at the end of the lever 21 is pinched and pulled strongly backward.

[0046] 12(a), (b), 15(b) and 16(b) show the MDC optical connector 100 when it is unlocked from the adapter 40. FIG. That is, in the locked state of Figures 11(a), (b), Figure 15(a) and Figure 16(a), when the head 23 at the end of the lever 21 is grasped with the fingertips and pushed downward, the claw member 22 housed in the claw housing hole 41 of the adapter 40 is unlocked and at the same time the lever 21 is also released from the mating groove 42A formed on the back surface of the upper wall 43a of the adapter 40.

[0047] 13(a), (b), 15(c) and 16(c) show the MDC optical connector 100 in a state where it has been slightly pulled out from the adapter 40. FIG. That is, in the unlocked state of Figures 12(a), (b), Figure 15(b) and Figure 16(b), when the head 23 at the end of the lever 21 is grasped with the fingertips and pulled backward, the MDC optical connector 100 is slightly pulled out of the adapter 40.

[0048] At this time, the claw receiving hole 41 of the lever 21 is pressed against the back surface (outside the mating groove 42A) of the upper wall 43a of the adapter 40, whereby by further pulling the head 23 at the end of the lever 21, the MDC optical connector 100 is completely pulled out of the adapter 40 (see Figure 8).

[0049] The above-described preferred embodiment of the present invention does not limit the scope of the present invention. In other words, a person skilled in the art can modify or substitute the above-described embodiment and construct various modified forms without departing from the gist of the present invention. For example, in the above-described embodiment, the housing 20 is entirely made of synthetic resin, so that the lever 21 is biased in a direction away from the housing 20 body. However, for example, a leaf spring or the like can be disposed between the housing 20 and the lever 21 to bias the lever 21 in a direction away from the housing 20 body.

[0050] In the above embodiment, the lever 21 is provided on the top plate 20A of the housing 20, but the lever 21 can also be provided on the bottom surface of the housing 20 if it does not interfere with the adapter 40. This makes it easier to switch polarities when the holder 10 and the housing 20 are separated.

[0051] Furthermore, in the MDC optical connector 100, the lever 21 provided on the top plate 20A of the housing 20 has claw members 22 protruding from the same surface on both sides thereof, but a locking member may be fixed to the upper surface of the lever 21 and used as the claw member 22 that fits into the claw accommodating hole 41 of the adapter 40. In this case, the adapter 40 does not necessarily require the fitting groove 42A for the lever 21 on the back surface of its upper wall 43a, and may be formed flat. [Explanation of symbols]

[0052] 10 Holder 11 holes 12a, 12b holes 13 Arm section 20. Housing 20A Top plate 21 Lever 22 Claw member 23 Head 24 protrusions 25 Recess 26a, 26b holes 31, 32 Ferrule 33, 34 Tube 35, 36 Metal fittings 40 Adapter 41 Claw receiving hole 41a Vertical locking surface 42 Insertion hole 42A Fitting groove 43 Adapter body 43a Upper wall 43b side wall 44 Partition guide plate 100 MDC Optical Connector 121 Arch Member 122 Locking Claw 123 Locking bar 200 Dedicated jig 201 Gripping member 201a Push-in part 202 Arm push-down member 202a Protrusion 203 Optical connector extraction member 203a Claw part t1 Lever depression amount (depressible width) t2 Height of jaw member

Claims

1. A Mini Duplex Connector (MDC) optical connector comprising a holder for accommodating a ferrule and a housing for holding the holder with the ferrule set therein, a lever is provided on at least one surface of the outer periphery of the housing having a substantially rectangular cross section, the lever being biased in a direction away from the housing body with the tip end side of the ferrule as a fulcrum; The lever is provided with a claw member that fits into a claw receiving hole of an adapter to which the MDC optical connector is connected. MDC optical connector.

2. 2. The MDC optical connector according to claim 1, wherein a recess for ensuring a pressing amount of the lever is provided on a surface of the housing facing the lever.

3. 2. The MDC optical connector according to claim 1, wherein a head portion is provided at an end of the lever, for exposing the lever so as to be operable when the MDC optical connector is inserted into the adapter.

4. 2. The MDC optical connector according to claim 1, wherein the housing is made of an elastic member capable of biasing the lever in a direction away from the housing body.

5. 2. The MDC optical connector according to claim 1, wherein at least a rear inner surface of the claw receiving hole of the adapter has a vertical wall surface that prevents the lever from moving rearward.

6. 2. The MDC optical connector according to claim 1, characterized in that a fitting groove for the lever is formed on the back surface of the upper wall of the adapter, the fitting groove being slightly wider than the width of the lever and having a depth approximately equal to the plate thickness of the lever and the claw member.

7. The MDC optical connector according to claim 6, characterized in that the fitting groove is formed across the front-to-rear direction below the claw accommodating hole so as to connect in a straight line with the rear vertical wall surface of the claw member and the opposite front wall surface of the claw accommodating hole.

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