JPH06215827A - Connector with cam member - Google Patents

Abstract

PURPOSE:To provide a connector with a cam member capable of temporarily hooking the cam member not to be removed from the temporary hook position during transportation and before use and improving the assembling workability. CONSTITUTION:Lances 62 each having a tip section 62b warped by the external force and a protruded section 62c are formed on two arms 61 of a cam member 60. When the cam member 60 is inserted into a cap housing, the tip sections 62b are coupled with temporary hook recesses of the cap housing, and the cam member 60 is temporarily hooked strongly in the sliding direction and the removing direction of the cam member 60. When a plug housing is slightly coupled, the plug housing pushes the protruded sections 62c outward, and the temporary hook state of the cam member 60 is released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cam member provided with a cam member which slides the cam member in a predetermined direction in the cap housing so that the plug housing and the cap housing are fitted to and disengaged from each other with a weak operation force. With connector.

[0002]

2. Description of the Related Art A connector with a cam member has been conventionally known in which a plug member and a cap housing are engaged with and disengaged from each other by a weak operating force using a cam member. As one example, a connector with a cam member described in Japanese Patent Laid-Open No. 61-203581 will be described with reference to the drawings.

FIG. 27 is a perspective view showing a connector with a cam member described in Japanese Patent Laid-Open No. 61-203581. This conventional connector 10 with a cam member is provided with a plug housing 20 and a cap housing 30 that are fitted to each other, and a cam member 40 that allows fitting and removal of the two with a weak operating force. The cam member 40 has two arms 42 and 44, and each arm 42,
44 is the upper and lower walls 34, 3 in the cap housing 30.
It is configured to slide along the inner surface of 6. The arms 42 and 44 have cam grooves 42a and
42b and cam grooves 44a, 44b are formed so as to be inclined in the fitting direction (the direction indicated by arrow A), while the cam followers 22a, 22b that engage with the cam grooves 42a, 42b are formed in the plug housing 20. (Cam groove 44 of arm 44
Cam followers corresponding to a and 44b are formed (not shown).

In order to assemble the connector 10 with a cam member, first, the cam member 40 is moved in the direction of arrow B so that the temporary locking position in the cap housing 30 (when the plug housing 20 and the cap housing 30 are fitted together, The cam followers 22a, 22b of the plug housing 20 and the cam grooves 42a, 42b of the cam member 40 are inserted for the first time). Next, by moving the plug housing 20 in the direction of arrow A, the cam followers 22a,
22b and one ends of the cam grooves 42a and 42b are engaged with each other. In this state, the cam follower 2 is pushed by pushing the cam member 40 in the direction of the arrow B and sliding it in the cap housing 30.
The plug housing 20 is fitted into the cap housing 30 because the 2a and 22b move along the cam grooves 42a and 42b while engaging with the cam grooves 42a and 42b.

As described above, in the connector 10 with a cam member, the cam grooves 42a and 42b inclined in the fitting direction are formed in the arm 42, and the cam member 40 is pushed to follow the cam grooves 42a and 42b. Since the plug housing 20 and the cap housing 30 are fitted by moving the children 22a and 22b, the operating force required for the fitting is the plug housing 2 without using the cam member 40.
It is weaker than the operating force required to fit the cap housing 30 by pushing 0 in the fitting direction (arrow A direction).

Further, the conventional connector 1 with a cam member described above.
0 is provided with a temporary locking mechanism for temporarily locking the cam member 40 to the cap housing 30. This temporary locking mechanism is composed of a protrusion 38 formed on the cap housing 30 and a shoulder 46 formed on the cam member 40.
6 is inserted beyond the protruding portion 38 and the surface 46a of the shoulder portion and the surface 38a of the protruding portion 38 contact each other, so that the cam member 40 cannot move in the detaching direction. In this way, the cam member 40 is prevented from coming off the cap housing 30 during transportation of the connector 10 with cam member or before use.

Here, as a conventional example, there is shown a connector with a cam member in which a cam follower is formed in a plug housing and a cam groove is formed in an arm of a cam member. However, contrary to the connector with a cam member, a plug is provided. There is also known a connector with a cam member in which a cam groove is formed in a housing and a cam follower is formed in an arm of the cam member (actual flat blade 3-7).
4483).

[0008]

The above-mentioned conventional provisional locking mechanism for the connector 10 with a cam member does not have a structure for temporarily locking the cam member 40 in the insertion direction, and therefore the connector 10 with a cam member is provided. Cam member 4 during transportation and before use
0 may shift from the temporary locking position. When the cam member 40 is temporarily locked at the temporary locking position, the cam follower 22
Since the a and 22b are engaged with the cam grooves 42a and 42b,
When the cam member 40 is disengaged from the temporary locking position, the cam follower 2
2a, 22b and the cam grooves 42a, 42b are not engaged. Therefore, when assembling the connector 10 with the cam member, the operator checks one by one whether or not the cam member 40 is in the temporary locking position, and when the cam member 40 is out of the temporary locking position, the temporary locking is performed. Returning to the position, the cap housing 30 and the plug housing 20 are fitted together. Therefore, there is a problem in that workability when assembling the connector 10 with a cam member is poor. On the other hand, when the cam member 40 is temporarily locked in the sliding direction so that the cam member 40 does not move from the temporary locking position during transportation or before use of the cam member-equipped connector 10, the cam member 40 is temporarily locked. There is a problem that the operation force when sliding the cap housing 30 from the position further increases and the workability deteriorates.

In view of the above circumstances, the present invention is capable of temporarily locking the cam member so that the cam member does not move from the temporary locking position during transportation or before use, and further improves the workability during assembly. It is intended to provide a connector with a connector.

[0010]

SUMMARY OF THE INVENTION To achieve the above object, a connector with a cam member according to the present invention comprises a cap housing and a cam groove which is fitted to the cap housing and is inclined with respect to the fitting direction or the cam groove. A plug housing having one of the cam followers engaging with the groove is slidably housed in the cap housing in a direction intersecting with the fitting direction, whereby the plug housing is accommodated in the cap housing. A cam member having the cam groove or the cam follower formed with the other one of the cam groove and the cam member, the cam member and the cap housing comprising:
The cam member is temporarily locked at a predetermined temporary locking position in the cap housing in the intersecting direction, and the cam follower is temporarily locked at the temporary locking position. A provisional locking mechanism is provided for releasing the temporarily locked state of the cam member when the cap housing receives the plug housing to a position where it is substantially in contact with the cam groove. It is a thing.

[0011]

In the connector with a cam member according to the present invention, the cam member is temporarily locked at the temporary locking position of the cap housing in the direction intersecting the fitting direction by the temporary locking mechanism. For this reason, the cam member is prevented from coming off the temporary locking position during transportation or before use. Further, when the plug housing is inserted into the cap housing to a position where the cam follower substantially contacts the cam groove with the cam member temporarily locked at the temporary locking position, the cam member is temporarily locked. Since the state is released, the cap housing and the plug housing can be fitted with each other with a weak operation force.

As a result, when the operator assembles the connector with the cam member, it is not necessary to confirm whether or not the cam member is in the temporary locking position one by one, so that the workability is good.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a connector with a cam member according to the present invention will be described with reference to the drawings. First, the components of the cam member-equipped connector 50 of the first embodiment will be described with reference to FIGS. 1 to 5. 1 and 2 show a cam member of the connector 50 with a cam member of the first embodiment, and FIGS. 3 and 4 show a cap housing into which the cam member is inserted and slides.
FIG. 5 shows a plug housing fitted with the cap housing, omitting terminals and cavities.

The connector with the cam member has a cap housing 70 and a plug housing 80 which are fitted to each other.
And a cam member 60 that slides in a direction (direction indicated by arrow H) orthogonal to the fitting direction (direction indicated by arrow G) and is accommodated in the cap housing 70. The cam member 60 is provided with a cap housing 70 with a small operating force.
In order to fit the plug housing 80 with the plug housing 80, the cap housing 70 is configured to slide in the direction indicated by the arrow H.

Like the conventional cam member 40 shown in FIG. 27, the cam member 60 is provided with two plate-like arms 61, and the two arms 61 are respectively provided in two cap housings 70. It is inserted into a space (not shown). Further, cam grooves 61a and 61b are formed in the arm 61, and cam followers 80 of a plug housing 80, which will be described later, are respectively formed in these two cam grooves 61a and 61b.
a and 80b are engaged. Further, a lance 62 is formed at each of the longitudinal central portions of the two arms 61. The fixed end portion 62a of the lance 62 is connected and fixed to the main body of the arm 61, and the tip end portion 62b and the protruding portion 62c are elastically bent by an external force with the fixed end portion 62a as an axis. When the cam member 60 is inserted into the cap housing 70, the tip portion 62b is fitted into a temporary locking recess 73 of the cap housing 70, which will be described later, so that the two surfaces of the tip portion 62b perpendicular to the sliding direction are temporarily locked. The cam member 60 is strongly temporarily locked in the inserting direction and the removing direction of the cam member 60 because the cam member 60 abuts on the two surfaces in the concave portion 73. Further, since the above-mentioned two surfaces of the tip portion 62b come into contact with the two surfaces in the temporary locking recess 73, respectively, and the movement thereof is restricted, the tip portion 62b is not easily deformed strongly against prying. As will be described later, the temporarily locked state of the cam member 60 is released when the plug housing 80 is inserted, and by sliding the cam member 60 in the released state in the direction indicated by the arrow H, the cap housing is released. 70 and the plug housing 80 are fitted together. A reinforcing rib 63 is formed in the arm 61 of the cam member 60 in the longitudinal direction.
The cam member 60 is guided in the cap housing 70 by housing 3 in the guide groove 74 of the cap housing 70.

The cap housing 70 includes a rear wall 71.
A plurality of rows of contacts (not shown) are provided through the connector. One end of each contact inside the cap housing 70 is inserted into the contact (not shown) of the plug housing 80, and the other end is an electric wire (not shown). No)) is connected. A temporary locking recess 73 is formed inside the cap housing 70, and the tip 62b of the lance 62 formed on the cam member 60 engages with the temporary locking recess 73 as described above. As a result, the temporarily locked state is maintained. Further, the guide groove 74 for guiding the cam member 60 inserted into the cap housing 70 is formed, and the reinforcing rib 63 formed on the cam member 60 is formed in the guide groove 74 as described above. Be accommodated.

The plug housing 80 includes a cam member 60.
Cam follower 8 engaging with the two cam grooves 61a, 61b of
0a and 80b are formed. Further, the plug housing 80 is formed with a recess 81 for receiving the protruding portion 62c of the lance 62 formed on the cam member 60 in a state where the cap housing 70 and the plug housing 80 are completely fitted to each other. The deformation of 62 is prevented.

Here, a process of fitting the plug housing 80 into the cap housing 70 will be described with reference to FIGS. 6 to 9. As shown in FIG. 6, the cam member 60
Even if the plug housing 80 is slightly fitted to the cap housing 70 in a state where the plug housing 80 is temporarily locked to the cap housing 70, the temporary locked state is not released. Here, as shown in FIG. 7, the cam followers 80a and 80b have the cam grooves 61
The cap housing 7 up to the position where the cap housing 7 is substantially abutted
When the plug housing 80 is fitted to 0, the protruding portion 62c of the lance 62 is pushed outward by the side wall 82 of the plug housing 80, the tip portion 62b of the lance 62 is disengaged from the temporary locking recess 73, and the cam member is 60 is released from the temporarily locked state. As shown in FIG. 8, when the cam member 60 is pushed in the direction of the arrow H, the cam followers 80a, 80b
Is slid along the cam grooves 61a and 61b, and the fitting is advanced. As the cam member 60 is further pushed in the direction of the arrow H, as shown in FIG. 9, the protrusion 62c of the lance 62 is received in the recess 81 of the plug housing 80, and the cap housing 70 and the plug housing 80.
Fit perfectly.

As described above, the connector 50 with a cam member of the first embodiment has the lance 62 formed on the cam member 60.
And a temporary locking recess 7 formed in the cap housing 70
3, the cam member 60 is temporarily locked at the temporary locking position of the cap housing 70 in the inserting direction and the removing direction of the cam member 60. In this temporary locking state, the cam follower 80
When the plug housing 80 is fitted into the cap housing 70 to the position where the a and 80b substantially contact the cam grooves 61a and 61b, it is released. Therefore, the cap housing 70 and the plug housing 80 can be fitted with a weak operation force. In addition, when assembling the connector 50 with a cam member, it is not necessary to confirm whether or not the cam member 60 is in the temporary locking position one by one. Therefore, workability at the time of assembling the connector 50 with a cam member is improved.

Next, referring to FIGS. 10 to 13, the second
The components of the connector 120 with a cam member of the embodiment will be described. 10 and 11 show a cam member of the connector 120 with a cam member of the second embodiment, and FIG. 12 shows a cap housing into which the cam member is inserted and which slides.
3 shows a plug housing that fits with the cap housing. The same parts as those of the connector with a cam member of the first embodiment are designated by the same reference numerals.

A feature of the connector with a cam member of the second embodiment is that the cam member is temporarily locked and released by moving the cam member in the fitting / removing direction of the cap housing and the plug housing. is there. For this reason, a lip 92 is formed on an arm 91 of the cam member 90 instead of the lance 62 of the cam member 60 (see FIG. 1) of the first embodiment, and a guide rib 93 is further formed. Also,
The cap housing 100 is formed with a temporary locking concave portion 101 that engages with the lip 92 of the cam member 90, and further, the first groove 102 and the second groove 10 that guide the guide rib 93.
3 is formed. In addition, the lance 62 is attached to the cam member 90.
Since the plug housing 110 is not formed (see FIG. 1), the recess 81 (see FIG. 5) is not formed in the plug housing 110.

Here, the steps until the plug housing 110 is fitted into the cap housing 100 will be described with reference to FIG.
The description will be made with reference to FIGS. Guide rib 93
Is inserted into the first groove 102 to guide the cam member 90 to the temporary locking position, and the cam member 90 is moved in the temporary locking position in the disengagement direction between the cap housing 100 and the plug housing 110, whereby the guide rib 93 is formed. The first groove 102
To the second groove 103. As a result, as shown in FIG. 14, the lip 92 is fitted into the temporary locking recess 101 of the cap housing 100, and the cam member 90 is strongly temporarily locked in the inserting direction and the removing direction of the cam member 90.
As shown in FIG. 15, when the cam member 90 is temporarily locked to the cap housing 100, the plug housing 11
When 0 is slightly fitted to the cap housing 100, the cam member 90 is pushed in the fitting direction. As shown in FIG. 16, when it is fitted a little further, the guide rib 93 will move to the second groove 10.
3 moves to the first groove 102, the lip 92 is disengaged from the temporary locking recess 101, and the state where the cam member 90 is temporarily locked is released. As shown in FIG. 17, the cam member 90 has an arrow H.
When the cam followers 80a, 80 are pressed in the direction of
b is slid along the cam grooves 61a and 61b, and the fitting is further advanced. When the cam member 90 is further pushed in the direction of the arrow H, the cap housing 100 and the plug housing 110 are completely fitted as shown in FIG.

As described above, the cam member-equipped connector 120 of the second embodiment has the lip 9 formed on the cam member 90.
2 and the temporary locking recess 101 formed in the cap housing 100 temporarily locks the cam member 90 at the temporary locking position of the cap housing 100 in the inserting direction and the removing direction of the cam member 90. Since the locked state is released when the plug housing 110 is slightly fitted to the cap housing 100, the cap housing 100 and the plug housing 110 can be fitted with a weak operating force, and the connector 120 with the cam member is attached. When assembling, it is not necessary to confirm whether the cam members 90 are in the temporary locking position one by one. Therefore, workability in assembling the connector 120 with a cam member is improved.

Next, referring to FIGS. 19 to 22, the third
The components of the connector 160 with a cam member of the embodiment will be described. 19 and 20 show a cam member of the connector 160 with a cam member of the third embodiment, and FIG. 21 shows a cap housing into which the cam member is inserted and which slides.
2 shows a plug housing that fits with the cap housing. The same parts as those of the connector with a cam member of the first embodiment are designated by the same reference numerals.

The characteristic of the connector with a cam member of the third embodiment is that a block-shaped projection is formed on the arm of the cam member via a hinge, and the block-shaped projection is formed in the cap housing for temporary locking. The cam member is temporarily locked to the cap housing when the plug housing is fitted to the cap housing, and the temporary locked state is released by slightly fitting the plug housing to the cap housing. In the connector with a cam member of the third embodiment, a block-shaped projection 132 is formed on the arm 131 of the cam member 130 via a hinge 133 instead of the lance 62 of the cam member 60 (see FIG. 1) of the first embodiment. The hinge 133 is designed to bend. Further, the cap housing 140 is formed with a temporary locking recess 141 that engages with the block-shaped protrusion 132 of the cam member 130. Further, since the lance 62 (see FIG. 1) is not formed in the cam member 130, the recess 81 (see FIG. 5) is not formed in the plug housing 150.

Here, the steps until the plug housing 150 is fitted into the cap housing 140 will be described with reference to FIG.
To FIG. 26 will be described. After pressing the block-shaped protrusion 132 of the cam member 130 in the fitting direction of the cap housing 140 and the plug housing 150 by an automatic machine (not shown) such as a robot, the cam member 130 is inserted into the cap housing 140. Since the block-shaped protrusion 132 is pushed down in the fitting direction by pressing, the block-shaped protrusion 132 does not interfere with the wall 141a forming the temporary locking recess 141 of the cap housing 140 and the cam member 130 when the cam member 130 is inserted. The cam member 130 can be inserted to the temporary locking position. The cam member 130 reaches this temporary locking position.
23 is inserted, a claw (not shown) of the automatic machine returns the block-shaped protrusion 132 to its original position, whereby the cam member 130 is inserted in the insertion direction of the cam member 130 as shown in FIG. Temporarily locked strongly in the detaching direction. The series of operations described above can be performed manually, but the workability is reduced. Next, as shown in FIG. 24, when the plug housing 150 is slightly fitted to the cap housing 140 in a state where the cam member 130 is temporarily locked to the cap housing 140, the block-shaped projection 132 is fitted in the fitting direction. Then, the block-shaped projection 132 is released from the temporary locking recess 141, and the cam member 130 is released from the temporarily locked state. As shown in FIG. 25, when the cam member 130 is pushed in the direction of the arrow H, the cam followers 80a and 80b are slid along the cam grooves 61a and 61b, and the fitting is further advanced. When the cam member 130 is further pushed in the direction of the arrow H, the cap housing 140 and the plug housing 150 are completely fitted, as shown in FIG.

As described above, the connector 160 with a cam member according to the third embodiment has the cap housing by the block-shaped projection 132 formed on the cam member 130 and the temporary locking recess 141 formed on the cap housing 140. The cam member 130 is placed at the temporary locking position of 140
Since the plug housing 150 is temporarily locked in the inserting direction and the removing direction of the cap housing 30 and the plug housing 150 is slightly engaged with the cap housing 140, the cap housing 140 and the plug housing 140 are weakly operated with a weak operation force. 1
50 can be fitted, and when assembling this connector 160 with a cam member, it is not necessary to confirm whether or not the cam member 130 is in the temporary locking position one by one.
Therefore, workability in assembling the connector 160 with a cam member is improved.

[0028]

As described above, in the connector with a cam member of the present invention, the cam member is temporarily locked at the temporary locking position of the cap housing in the direction intersecting with the fitting direction by the temporary locking mechanism. Therefore, the cam member is prevented from coming off the temporary locking position during transportation or before use. If the plug housing is slightly fitted into the cap housing while the cam member is temporarily locked at the temporary locking position, the temporarily locked state of the cam member is released, so a weak operating force is applied. The cap housing and the plug housing can be fitted with each other.

As a result, when the operator assembles the connector with the cam member, it is not necessary to confirm whether or not the cam member is in the temporary locking position one by one, so that the workability is good.

[Brief description of drawings]

FIG. 1 shows a cam member of a connector with a cam member according to a first embodiment, (a) is a front view, (b) is a sectional view taken along line AA of (a), and (c) is C- of (a). It is a C arrow line view.

FIG. 2 is a sectional view taken along line BB in FIG.

FIG. 3 shows the cap housing of the first embodiment,
(A) is a front view, (b) is a DD arrow view of (a).

FIG. 4 is a sectional view taken along line EE of FIG.

FIG. 5 shows the plug housing of the first embodiment, (a)
Is a plan view, (b) is a sectional view taken along line FF of (a), and (c) is a front view.

6A and 6B show a state in which a cam member is temporarily locked to a cap housing, FIG. 6A is a plan view, and FIG. 6B is II of FIG.
FIG.

7A and 7B show a state in which a cam follower is substantially in contact with a cam groove in a state where the cam member is temporarily locked to the cap housing, (a) is a plan view, and (b) is JJ of (a). FIG.

FIG. 8 is a plan view showing (a) a plan view and (b) a sectional view taken along the line KK of (a), showing a state where the cam member is disengaged from the temporarily locked state and the plug housing is being fitted to the cap housing. is there.

9A and 9B are a plan view and a sectional view taken along line LL of FIG. 9A, respectively, showing a state where the plug housing is completely fitted in the cap housing.

FIG. 10 shows a cam member of a connector with a cam member according to a second embodiment, (a) is a front view, (b) is a sectional view taken along line MM of (a), and (c) is N- of (a). It is N sectional drawing.

11 is a bottom view of the cam member shown in FIG.

FIG. 12 shows a cap housing of the second embodiment,
(A) is a front view, (b) is a sectional view taken along line OO of (a),
(C) is a side view seen from the insertion side of the cam member.

FIG. 13 shows a plug housing of the second embodiment,
(A) is a plan view, (b) is a side view, and (c) is a front view.

14A and 14B show a state where the cam member is temporarily locked to the cap housing, FIG. 14A is a plan view, and FIG. 14B is a P- of FIG.
It is a P sectional view.

15A and 15B show a state in which the cam follower is substantially in contact with the cam groove when the cam member is temporarily locked to the cap housing. FIG. 15A is a plan view and FIG. 15B is a QQ of FIG. FIG.

16A and 16B are a plan view and a sectional view taken along line RR in FIG. 16A, respectively, showing a state where the cam member is out of the temporarily locked state.

FIG. 17 is a plan view showing (a) a plan view and (b) a sectional view taken along line S-S of (a), showing a state where the cam member is out of the temporarily locked state and the plug housing is fitted into the cap housing. is there.

18A and 18B are a plan view and a sectional view taken along line TT of FIG. 18A, respectively, showing a state where the plug housing is completely fitted to the cap housing.

FIG. 19 shows a cam member of a connector with a cam member according to a third embodiment, (a) is a front view, (b) is a U-U sectional view of (a), and (c) is a V- of (a). It is a V sectional view.

20 is a WW arrow view of the cam member shown in FIG.

FIG. 21 shows a cap housing of the third embodiment,
(A) is a front view, (b) is a XX sectional view of (a),
(C) is a side view seen from the insertion side of the cam member.

FIG. 22 shows a plug housing of the third embodiment,
(A) is a plan view, (b) is a side view, and (c) is a front view.

23A and 23B show a state in which the cam member is temporarily locked to the cap housing, FIG. 23A is a plan view, and FIG.
It is a Y sectional view.

24A and 24B show a state in which the cam follower is substantially in contact with the cam groove when the cam member is temporarily locked to the cap housing. FIG. 24A is a plan view and FIG. FIG.

FIG. 25 is a plan view showing (a) a plan view and (b) a sectional view taken along the line α-α of (a), showing a state where the cam member is disengaged from the temporarily locked state and the plug housing is being fitted to the cap housing. is there.

26A and 26B are a plan view and a sectional view taken along the line β-β of FIG.

FIG. 27 is a perspective view showing a conventional connector with a cam member.

[Explanation of symbols]

 50, 120, 160 Connector with cam member 60, 90, 130 Cam member 61, 91, 131 Arm 62 Lance 70, 100, 140 Cap housing 80, 110, 150 Plug housing 92 Lip 132 Block-shaped protrusion 133 133 Hinge

Claims (1)

[Claims] 1. A plug housing having a cap housing, and one of a cam groove that fits into the cap housing and is inclined with respect to the fitting direction, or a cam follower that engages with the cam groove. One of the cam groove and the cam follower, the other one of which fits the plug housing into the cap housing by being slidably accommodated in the cap housing in a direction intersecting with the fitting direction, A cam member-equipped connector including a formed cam member, wherein the cam member and the cap housing temporarily lock the cam member at a predetermined temporary locking position in the cap housing in the intersecting direction. , The position where the cam follower substantially contacts the cam groove when the cam member is temporarily locked at the temporary locking position. When the cap housing has accepted the plug housing, the cam member with the connector, wherein the cam member is provided with a provisional locking locking mechanism provisionally locked state is canceled.