JP6091966B2 - Console door operation device - Google Patents

Description

  The present invention relates to a console door operating device. Specifically, an operation device for locking the console door that opens and closes the upper surface opening of the storage portion of the console box main body (hereinafter referred to as the console main body) to the console main body, and the position of the door lever of the console door are regulated. It is related with the operating device for.

  This type of console door operating device is disclosed in Japanese Patent Application Laid-Open No. H10-228707. This console door operating device includes a lock pin on the side of the console door that can lock the console door to the console body. The lock by the lock pin is set so as to be released by pulling up a door lever provided at the front end of the console door.

  In this console door operation device, the door lever is in contact with a cam block disposed behind the door lever. Since the front part of the cam block has an inclined surface that is inclined obliquely downward, the operating force of the door lever that is generated when the door lever is rotated upward is immediately converted to a force that causes the cam block to retract. Converted. As the cam block moves backward, the lock pin is unlocked.

  The cam block described above is always urged forward by the urging means. Therefore, when the rotationally operated door lever is released, the inclined surface of the cam block front part operates to rotate the door lever in the return direction and return the door lever to the initial position before the operation.

JP 2009-67105 A

In the console door operation device described in Patent Document 1, the operation direction of the door lever for releasing the lock by the lock pin is limited to the upper side. Therefore, when it is difficult for the user of the console box to lift the door lever upward, it is difficult for the user to unlock the lock pin and open the console door.
Further, in this operation device, when the door lever is released from the rotation operation, the inclined direction of the inclined surface of the cam block that biases the door lever in the direction of the initial position is set to only one downward direction. Therefore, the position control of the door lever by the operation device is limited to the one corresponding to the rotation operation of the door lever in one direction. In addition, the return position of the door lever biased in the return direction is determined by contacting the stopper in the operating device. The contact between the door lever and the stopper causes the generation of abnormal noise in the operating device.

The present invention is intended to solve the above-described problems, and an object of the present invention is to provide a console capable of releasing the lock state by the lock pin even if the door lever is rotated in any direction. It is to provide an operating device for a door.
In addition, even when the door lever is rotated in either the upper or lower direction, the door lever can always be returned to the neutral position, and the stopper for positioning the door lever can be eliminated to prevent the generation of abnormal noise. A console door operating device is provided.

The present invention is for achieving the above object, and is configured as follows.
The console door operating device includes a lock pin that locks a console door that can be opened and closed to the console body in a closed state with respect to the console body side, and a door lever that releases the lock by the lock pin. The lock pin is assembled so that it can be operated to lock and unlock the console door and is reciprocated linearly with respect to the console door. It is supported by the console door so that it can be rotated up and down from the neutral position, and either the lock pin or the door lever includes a cam portion, and the other includes a contact for the cam portion. The cam portion includes a first cam surface and a second cam surface respectively extending at a predetermined inclination angle from an intermediate point in the vertical direction in a vertical direction, and the contact is located at the intermediate point of the cam portion when the door lever is in the neutral position. Positioned and configured to move relative to the first cam surface or the second cam surface of the cam portion and to operate the lock pin in the unlocked state by rotating the door lever up or down. Therefore, when the contact moves along the first cam surface or the second cam surface of the cam portion, the side of the cam portion and the contact provided on the lock pin linearly moves .
According to this configuration, the lock by the lock pin can be released even if the door lever is rotated in any direction.

The console door operating device includes a door lever assembled to the console door and a control bar that controls the position of the door lever, and the door lever can be rotated up and down from its neutral position. The restriction bar is assembled so as to reciprocate with respect to the console door, and receives a biasing force so as to be pulled back in one direction by the spring . The spring includes the restriction bar and the restriction bar. A restriction bar retainer that supports the reciprocating movement of the restriction bar, and is attached in parallel to the movement direction of the restriction bar. One of the restriction bar and the door lever includes a restriction cam portion, and the other is a restriction contact to the restriction cam portion. It has. The restricting cam portion includes a first cam surface and a second cam surface that respectively extend at a predetermined inclination angle from an intermediate point in the up-down direction, and the restricting contact member is intermediate between the restricting cam portion when the door lever is in a neutral state. The control bar is configured to move relative to the first cam surface or the second cam surface of the restricting cam portion and move the restricting bar by rotating the door lever in either the upper or lower direction. When the rotated door lever is released, the restriction bar is pulled back by the biasing force of the spring, and the restriction contact is returned to the intermediate point of the restriction cam portion.
According to this configuration, even when the door lever is rotated in any of the upper and lower directions, the door lever can always be returned to the predetermined neutral position by releasing the operation force.

It is an external appearance perspective view of a center console. It is an external appearance perspective view of a console door. It is a perspective view of each component which comprises the console door operating device. The top view showing the assembly state of each component which comprises the console door operation device. It is sectional drawing of the VV arrow direction of FIG. It is sectional drawing of the VI-VI arrow direction of FIG. The operation of the console door operation device is represented by a cross-sectional view in the direction of arrows VI-VI in FIG. The operation of the console door operation device is represented by a sectional view in the direction of arrows VIII-VIII in FIG. The operation of the console door operation device according to another embodiment is represented by a cross-sectional view in the direction of arrows VI-VI in FIG.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
As shown in FIG. 1, the console door 10 is installed so that the open upper surface of the upper box 3 may be opened and closed with respect to the upper box 3 of the console main body 2 in the center console 1 of the vehicle (mainly automobile).

  As shown in FIG. 2, the console door 10 has a box-shaped door inner 12 as a skeleton. The console door 10 is configured by covering the upper surface of the door inner 12 with a door outer 14 and further providing a door pad 16 on the upper surface of the door outer 14.

  Door rotation shafts 12 a are provided at the rear portions on both sides of the door inner 12. In the assembled state shown in FIG. 1, the console door 10 is assembled to the upper box 3 via the door rotation shaft 12a. The console door 10 assembled to the upper box 3 is supported so as to be rotatable with respect to the upper box 3 about the door rotation shaft 12a.

  Insertion holes 12 b (see FIG. 4) that penetrate the side walls of the door inner 12 in the thickness direction are provided at both front portions of the door inner 12. A lock portion 24a of a lock pin 24 to be described later protrudes outward from the door inner 12 through the insertion hole 12b. The console door 10 can be locked to the upper box 3 by the outward protrusion of the lock portion 24a.

  As shown in FIG. 2, the front ends of the door inner 12 and the door outer 14 are cut out at the center in the left-right direction. And the holding part 20a of the door lever 20 mentioned later is arrange | positioned at this notched part.

  Inside the console door 10, a door lever 20, a lever shaft 22, a lock pin 24, a lock pin retainer 26, a restriction bar 28, a restriction bar retainer 30, and springs S1 and S2 shown in FIG. 3 are provided. These members are assembled together in the door inner 12 as shown in FIG. The console door 10 operating device is configured by this assembly.

  As shown in FIG. 4, a door lever 20 is disposed at the center in the left-right direction at the front end of the door inner 12. The door lever 20 is assembled to a locking portion of the door inner via a rotation support portion 20c described later. The door lever 20 is supported by the door inner 12 so as to be rotatable up and down around the rotation support portion 20c.

  The front end portion of the door lever 20 is a grip portion 20a extending left and right (see FIG. 3). A pair of transmission blocks 20b divided into left and right are formed on the rear side of the grip portion 20a. The rotation support portion 20c described above is provided on the outer side surface of both transmission blocks 20b.

  In both transmission blocks 20b of the door lever 20, a through-hole 20d for inserting a lever shaft 22 (described later) in the left-right direction is provided on the rear side of the rotation support portion 20c (see FIG. 3). Further, a cylindrical contact 20e extending rearward is provided at the rear end of both transmission blocks 20b (see FIG. 3). Both the contacts 20e are set so as to transmit the operating force of the door lever 20 to the lock pin 24 by being inserted into a cam portion 25 of the lock pin 24 described later.

  As shown in FIG. 4, inside the door inner 12, lock pins 24 are individually provided on the left and right sides of both transmission blocks 20 b of the door lever 20. Both lock pins 24 extend back and forth along the side wall of the door inner 12, and the rear end side is bent toward the center of the door inner 12. Both lock pins 24 can move with respect to the left-right direction of the door inner 12.

  A cylindrical lock portion 24 a that protrudes outward from the door inner 12 is formed at a portion of both the lock pins 24 that extends in the front-rear direction of the door inner 12. The lock part 24a is configured to be able to be inserted into and retracted from an insertion hole 12b provided in the side wall of the door inner 12.

  A cam portion 25 is formed at the distal end of the portion of the lock pins 24 toward the center of the door inner 12 (see FIG. 3). A central portion on the front side of the cam portion 25 is recessed. Of the wall forming the recessed portion, the portion closer to the center of the door inner is a first cam surface 25a extending outward from the door inner 12 at a predetermined inclination angle from the vertical middle point 25c of the cam portion 25 in the vertical direction. And the second cam surface 25b.

  In the assembled state shown in FIG. 4, the cam portions 25 of both lock pins 24 are positioned behind the two transmission blocks 20 b of the door lever 20. Then, the contact 20e of the door lever 20 is inserted into the recessed portions of both the cam portions 25, and the cam portion 25 and the contact 20e are connected (see FIG. 5).

  The cam portion 25 of the lock pin 24 and the contact 20e of the door lever 20 are assembled to each other under the following settings. That is, when the grip 20a of the door lever 20 is in the neutral position shown in FIG. 5, the contact 20e of the door lever 20 is set to be positioned at the intermediate point 25c of the cam 25 (see FIG. 6). Further, when the contact 20e of the door lever 20 moves in the up / down direction as the grip 20a of the door lever 20 is rotated in the up / down direction, the contact 20e becomes the first cam surface of the cam portion 25 in the lock pin 24. 25a or the second cam surface 25b is set so as to move in contact.

  In the lock pin 24, a protrusion 24b is provided on the rear side of the cam portion 25 (see FIG. 3). As shown in FIG. 4, the protrusion 24b is connected to a lock pin retainer 26 (see FIG. 3) fixed to the door inner 12 at a position on the outer side of the protrusion 24b by a spring S1. . As a result, when the lock pin 24 moves inward of the door inner 12 as will be described later, the lock pin 24 is always urged outward to return to a predetermined position.

  As shown in FIG. 4, inside the door inner 12, a regulating bar 28 that extends back and forth in the center in the left-right direction of the door inner 12 is disposed behind the door lever 20. The restriction bar 28 can move with respect to the front-rear direction of the door inner 12.

  The restriction bar 28 includes a restriction cam portion 29 at the front end thereof (see FIG. 3). The inside of the restriction cam portion 29 is penetrated in the left-right direction. The front end portion of the penetrated portion is constituted by a first cam surface 29a and a second cam surface 29b that extend backward from the vertical intermediate point 29c of the restriction bar 28 in the vertical direction at a predetermined inclination angle.

In the assembled state shown in FIG. 4, the restriction cam portion 29 of the restriction bar 28 is disposed between both transmission blocks 20 b of the door lever 20. And the lever shaft 22 is penetrated by the left-right direction with respect to the penetration part of this control cam part 29, and the through-hole 20d of both the transmission blocks 20b. The lever shaft 22 is secured to the outside of both transmission blocks 20b. Thereby, the restriction bar 28 is connected to the door lever 20 via the lever shaft 22.
The lever shaft 22 is capable of circular motion with the rotation support portion 20c as a fulcrum together with both transmission blocks 20b of the door lever 20. The lever shaft 22 corresponds to the “regulator contact” of the present invention.

  The restriction cam portion 29 and the lever shaft 22 of the restriction bar 28 are assembled to each other under the following settings. That is, as will be described in detail later with reference to FIG. 8, the lever shaft 22 is set to be positioned at an intermediate point 29 c of the restricting cam portion 29 when the gripping portion 20 a of the door lever 20 is in the neutral position. Further, as the gripping portion 20a of the door lever 20 is rotated up and down, the lever shaft 22 moves while being in contact with the first cam surface 29a or the second cam surface 29b of the restriction cam portion 29 of the restriction bar 28. Is set to

  In the restriction bar 28, a protrusion 28a is provided behind the restriction cam portion 29 (see FIG. 3). As shown in FIG. 4, the protrusion 28a is connected to a regulating bar retainer 30 (see FIG. 3) fixed to the door inner 12 at a position behind the protrusion 28a by a spring S2. As a result, when the regulation bar 28 moves forward as will be described later, the regulation bar 28 is always urged rearward to return to a predetermined position.

  Next, how the console door 10 is locked and unlocked by the console door 10 operating device will be described mainly with reference to FIG. 7A shows a state in which the grip 20a of the door lever 20 is in the neutral position, FIG. 7B shows a state in which the grip 20a of the door lever 20 is rotated downward, and FIG. A state in which the grip 20a is rotated upward is shown. Since the configuration and operation of the lock pin 24 and the door lever 20 are symmetrical on the left and right sides of the console door 10, only the left side portion is shown here.

  As shown in FIG. 7A, when the gripping portion 20 a of the door lever 20 is in the neutral position, both the contacts 20 e of the door lever 20 are located at the intermediate point 25 c of the cam portion 25. At this time, the lock portion 24 a of the lock pin 24 jumps out of the console door 10 and locks the console door 10 with respect to the upper box 3.

  When the gripping portion 20a of the door lever 20 is rotated downward from its neutral position, the contact 20e of the door lever 20 relatively moves upward along the first cam surface 25a of the cam portion 25, as shown in FIG. ), The lock pin 24 is guided inward. At this time, the lock portion 24a of the lock pin 24 is retracted inward of the console door 10, and the unlocked state of the console door 10 with respect to the upper box 3 is realized.

  When the grip 20a of the door lever 20 is rotated upward from its neutral position, the contact 20e of the door lever 20 relatively moves downward along the second cam surface 25b of the cam 25, as shown in FIG. As shown in (C), the lock pin 24 is guided inward. At this time, the lock portion 24 a of the lock pin 24 is retracted inward of the console door 10 to realize the unlocked state of the console door 10 with respect to the upper box 3.

When the door lever 20 that is rotated downward or upward is released to the free state, the lock pin 24 is biased toward the side of the console door 10 by a spring S1 that connects the lock pin 24 and the lock pin retainer 26. Then, it returns to the predetermined position shown in FIG.
At this time, the contact 20e of the door lever 20 returns to the intermediate point 25c of the cam portion 25. And the holding part 20a of the door lever 20 returns to a neutral position.

  When the door lever 20 that has been rotated downward is opened in a free state, the contact 20e of the door lever 20 moves relatively downward along the first cam surface 25a of the cam portion 25, and the middle of the cam portion 25 is moved. Return to point 25c. When the door lever 20 that has been operated to rotate upward is released to a free state, the contact 20e of the door lever 20 moves relatively upward along the second cam surface 25b of the cam portion 25, and the intermediate point of the cam portion 25 is reached. Return to 25c.

  In the present embodiment, when the grip 20a of the door lever 20 is rotated in either the up or down direction, the contact 20e of the door lever 20 relatively moves along the first cam surface 25a or the second cam surface 25b. Then, the lock pin 24 is configured to operate in an unlocked state. Therefore, the lock by the lock pin 24 can be released by rotating the grip 20a of the door lever 20 in any direction.

  Next, the state of the position control of the door lever 20 by the console door 10 operating device will be mainly described with reference to FIG. 8A shows a state where the gripping portion 20a of the door lever 20 is in the neutral position, FIG. 8B shows a state where the gripping portion 20a of the door lever 20 is rotated downward, and FIG. A state in which the grip 20a is rotated upward is shown.

  As shown in FIG. 8A, when the gripping portion 20 a of the door lever 20 is in the neutral position, the lever shaft 22 is located at the intermediate point 29 c of the restricting cam portion 29.

  When the gripping portion 20 a of the door lever 20 is rotated downward from its neutral position, the lever shaft 22 relatively moves upward along the first cam surface 29 a of the regulating cam portion 29. As a result, as shown in FIG. 8B, the regulation bar 28 is guided forward.

  Further, when the grip portion 20 a of the door lever 20 is rotated upward from its neutral position, the lever shaft 22 relatively moves downward along the second cam surface 29 b of the restriction cam portion 29. As a result, as shown in FIG. 8C, the regulation bar 28 is guided forward.

  When the door lever 20 that has been rotated downward or upward is released to the free state, the lever shaft 22 is urged toward the center of the console door 10 by a spring S2 that connects the lever shaft 22 and the restriction bar retainer 30, FIG. Return to the predetermined position shown in FIG. Along with this, the lever shaft 22 returns to the intermediate point 29 c of the restriction cam portion 29. And the holding part 20a of the door lever 20 returns to a neutral position.

  When the door lever 20 that has been rotated downward is opened in a free state, the lever shaft 22 moves relatively downward along the first cam surface 29 a of the restriction cam portion 29, and the intermediate point of the restriction cam portion 29. Return to 29c. Further, when the door lever 20 that has been operated to rotate upward is released in a free state, the lever shaft 22 moves relatively upward along the second cam surface 29 b of the restricting cam portion 29, and the intermediate point of the restricting cam portion 29. Return to 29c.

  The position control of the door lever 20 using the control bar 28 is not only performed when the console door 10 is locked and unlocked by the console door 10 operating device of the present embodiment, but also locked by another general link mechanism. It can also be used when the console door 10 is locked and unlocked by an operating device in which the door and the lever are connected.

  The position restriction of the door lever 20 using the restriction bar 28 can be used even when the operation direction of the grip 20a of the door lever 20 is only upward or downward.

  In this embodiment, the restriction bar 28 is assembled to the door inner 12 via the spring S2, and when the door lever 20 that has been rotated is released to a free state, the restriction bar 28 is pulled back to a predetermined position by the spring S2. Thus, the lever shaft 22 assembled to the door lever 20 is configured to return to the intermediate point 29 c of the restriction cam portion 29. Therefore, even when the door lever 20 is rotated in any direction, the door lever 20 can always be returned to the predetermined neutral position by releasing the operation force of the door lever.

Further, in the present embodiment, when the door lever 20 that is rotated downward or upward is released to the free state, the lever shaft 22 follows the first cam surface 29a or the second cam surface 29b of the restriction cam portion 29. The grip 20a of the door lever 20 is configured to return to a predetermined neutral position by moving and returning to the intermediate point 29c of the restriction cam 29. Therefore, no contact noise is generated when the gripping portion 20a of the door lever 20 returns to the predetermined neutral position.
On the other hand, in the case of an operating device in which a stopper is provided inside the console door, and when the door lever is released from the rotation operation and moved in the return direction, the return position is determined by the door lever contacting the stopper The contact sound generated when the door lever comes into contact with the stopper cannot be prevented. And in order to prevent generation | occurrence | production of this contact sound, it is necessary to attach a cushion member to a stopper, In this case, the increase in a number of structural members is not prevented.

  In the above, the best mode for carrying out the present invention has been described with reference to FIGS. 1 to 8, but this embodiment can be easily changed or modified without departing from the spirit of the present invention. .

In the console door 10 operating device in the above-described embodiment, the door lever 20 includes the contact 20e behind the rotation support portion 20c, and the first cam surface 25a and the second cam surface that the lock pin 24 extends in an up-down direction. The cam part 25 which has 25b is provided.
Instead of this form, the door lever 20 is provided with a cam portion 21 having a first cam surface 21a and a second cam surface 21b extending in the vertical direction behind the rotation support portion 20c, and a lock pin 24 is provided. It is also possible to adopt a configuration including a rod-shaped contact 24 c configured to be assembled to the cam portion 21.

  FIG. 9 shows how the console door 10 operating device having this changed configuration is locked and unlocked. 9A shows a state in which the grip 20a of the door lever 20 is in the neutral position, FIG. 9B shows a state in which the grip 20a of the door lever 20 is rotated downward, and FIG. A state in which the grip 20a is rotated upward is shown. Since the configuration and operation of the door lever 20 and the lock pin 24 are symmetrical on the left and right of the console door 10, only the left side portion is shown here.

As shown in FIG. 9, in this embodiment, the first cam surface 21a and the second cam surface 21b of the cam portion 21 of the door lever 20 are inclined at a predetermined angle from the vertical intermediate point 21c of the cam portion 21 in the vertical direction. Each of the doors 12 extends inward of the door inner 12.
In the neutral state of the grip 20a of the door lever 20, the contact 24c of the lock pin 24 is set so as to be positioned at an intermediate point 21c of the cam 21 of the door lever 20 as shown in FIG. Has been. When the cam portion 21 of the door lever 20 moves up and down as the grip portion 20a of the door lever 20 is rotated in the vertical direction, the contact 24c of the lock pin 24 causes the first of the cam portion 21 of the door lever 20 to move. It is set to move relatively along the cam surface 21a or the second cam surface 21b.

  According to this configuration, when the grip portion 20a of the door lever 20 is rotated downward, the cam portion 21 of the door lever 20 moves upward, and the contact 24c of the lock pin 24 is accordingly moved to the second cam surface of the cam portion 21. Guided inward along 21b. Then, as shown in FIG. 9B, the lock pin 24 is retracted inward of the console door 10.

  Further, when the gripping portion 20a of the door lever 20 is rotated upward, the cam portion 21 of the door lever 20 moves downward, and accordingly, the contact 24c of the lock pin 24 moves along the first cam surface 21a of the cam portion 21. Guided inward. Then, as shown in FIG. 9C, the lock pin 24 is retracted inward of the console door 10.

The console door 10 operating device shown in relation to FIGS. 1 to 8 can be modified as follows. That is, in the console door 10 operating device shown in relation to FIGS. 1 to 8, the door lever 20 includes a lever shaft 22 (regulating contact) behind the rotation support portion 20c, and the regulating bar 28 is inclined in the vertical direction. And a restricting cam portion 29 having a first cam surface 29a and a second cam surface 29b.
Instead of this form, the door lever 20 is provided with a restriction cam portion having a first cam surface and a second cam surface extending obliquely in the vertical direction behind the rotation support portion 20c. It can also be set as the structure provided with the control contact which moves relatively along the 1st cam surface or the 2nd cam surface of a control cam part.
The first cam surface and the second cam surface of the restriction cam portion of the door lever 20 are configured to extend forward at a predetermined inclination angle in the vertical direction from the vertical intermediate point of the restriction cam portion. In the neutral state of the gripping portion 20 a of the door lever 20, the restriction contact of the restriction bar is set so as to be positioned at the midpoint of the restriction cam portion of the door lever 20.
According to this configuration, the position of the door lever 20 can be regulated in the same manner as the position regulation of the door lever 20 shown in relation to FIGS.

  The operation device for the console door 10 according to the present invention is not limited to the console door 10 only. For example, it is applicable also to articles other than the console door 10 provided with a door lever and a lock part, such as a grab box.

2 Console body 10 Console door 20 Door lever 20e Contact 24 Lock pin 24a Lock portion 25 Cam portion 25a First cam surface 25b Second cam surface 25c Midpoint

Claims (2)

The console door operating device includes a lock pin that locks a console door that can be opened and closed to the console body in a closed state with respect to the console body side, and a door lever that releases the lock by the lock pin. And
The lock pin is assembled so that it can be operated to lock and unlock the console door and is reciprocated linearly with respect to the console door, and the door lever is in its neutral position. Is supported by the console door so that it can be rotated in both directions up and down,
Either the lock pin or the door lever has a cam part, and the other has a contact to the cam part,
The cam portion includes a first cam surface and a second cam surface that extend from an intermediate point in the vertical direction in a vertical direction at a predetermined inclination angle,
When the door lever is in the neutral position, the contactor is positioned at the intermediate point of the cam portion, and is rotated along the first cam surface or the second cam surface of the cam portion by rotating the door lever up or down. It is configured to move relatively and operate the lock pin in the unlocked state ,
When the contact moves along the first cam surface or the second cam surface of the cam portion, the side of the cam portion and the contact provided on the lock pin linearly moves . A console door operation device comprising a door lever assembled to a console door and a restriction bar for regulating the position of the door lever,
The door lever is supported by the console door so that the door lever can be rotated up and down from its neutral position, and the regulating bar is assembled so as to reciprocate with respect to the console door and is pulled back in one direction by a spring. Has been energized by
The spring is attached to the regulation bar and the regulation bar retainer that supports the regulation bar so as to be able to reciprocate in parallel with the movement direction of the regulation bar.
Either one of the restriction bar and the door lever is provided with a restriction cam part, and the other is provided with a restriction contact for the restriction cam part,
The restriction cam portion includes a first cam surface and a second cam surface that respectively extend from the intermediate point in the vertical direction to the vertical direction at a predetermined inclination angle.
When the door lever is in the neutral position, the restricting contact is positioned at an intermediate point of the restricting cam portion. By rotating the door lever in either the upper or lower direction, the restricting contact is placed on the first cam surface or the second cam surface. Configured to move relative to the restriction bar and move
An operation device for a console door configured such that when the rotationally operated door lever is released, the restriction bar is pulled back by the urging force of the spring, and the restriction contact is returned to the intermediate point of the restriction cam portion.

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