JPH0325590B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a locking device, and more particularly to a locking device suitable for an automobile door.

(Prior art) Japanese Patent Application Laid-open No. 49-57522 discloses a lever that is displaced between a lock position and an unlock position, a disk-shaped rotary plate that rotates only in the forward direction by a drive motor, and a mechanism for rotating the rotary plate. A structure is described that includes a spiral cam groove formed around a central axis, two switch cam rings that rotate together with the rotary plate, and at least four switches that control the rotation of the rotary plate. ing.

(Problems to be Solved by the Invention) In the known example, two cam wheels for switches and at least four switches control the on/off of the drive motor and the rotation of the disc-shaped rotary plate. The number of parts is large, and assembly is time-consuming.
Moreover, the accuracy is not sufficient.

In addition, in the known example, when manually switching between locking and unlocking, it is necessary to maintain the relative relationship between the rotary plate, cam wheel, and switch, so it is necessary to rotate the drive motor as well as the rotary plate and cam wheel. There were also issues that made it difficult to operate.

However, since the technology to rotate the drive motor for a certain period of time or to automatically stop it when a certain load is applied is already well known, it is possible to improve the cam groove without using a cam ring for a switch or multiple switches. In both cases, the drive motor and rotary plate can be controlled, the mechanism can be simplified, and the accuracy can be improved.

(Object of the Invention) Therefore, the present invention provides a cam groove type locking device that further simplifies the mechanism and improves accuracy.

Furthermore, the present invention enables manual switching without affecting the output mechanism of the drive motor.

(Means for Solving the Problems) Therefore, the present invention provides a lock lever that is displaced between a lock position and an unlock position, a rotating member that is rotated in forward and reverse directions by a drive motor, and a lock lever that is formed around a central axis of rotation of the rotating member. and a cam follower lever that has a cam follower that engages with the cam groove and displaces the lock lever by rotation of the rotating member, and the cam groove has a cam follower that displaces the lock lever when the rotating member rotates in the normal direction. The motor has a lock position abutting part against which the cam follower abuts, and an unlock position abutting part against which the cam follower abuts when the rotating member is reversed, and the motor is configured such that the cam follower abuts against the lock position abutting part. The locking device continues to rotate until it abuts against the locking portion or the unlocking position abutting portion, and the cam groove connects the locking position abutting portion and the unlocking position abutting portion in the radial direction or rotational axis of the rotating member. The lock position abutment part and the unlock position abutment part are arranged in parallel in the direction, and the lock position abutment part and the unlock position abutment part are arranged so that the cam driven lever can be displaced between the lock position abutment part and the unlock position abutment part without passing through the cam groove. This is a locking device in which the parts are communicated with each other through a communication groove.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. The lock device shown in its entirety in FIG. Metal cover plate 3
(Fig. 3).

The interior of the body 2 is formed hollow, and accommodates a known latch mechanism to be described later. The body 2 also supports a mechanism for controlling the latch mechanism. A cover plate 3 is integrally fixed to the back side of the body 2 by rivets or the like, and when used as a door of an automobile, the cover plate 3 is attached to the door side in a known manner.

As shown in FIG. 3, the cover plate 3 has a guide slit 4 into which a striker S fixed to the vehicle body enters, and a latch L is rotatably mounted on a shaft 5 across the guide slit 4. The latch L has a recess 6 in which the striker S engages.
Further, the latch L is formed with an arc-shaped long groove 7 centered on the shaft 5, and a cut-and-raised piece 8 that integrally rises from the cover plate 3 is engaged in the arc-shaped long groove 7.
A compression spring 9 is inserted between the cut and raised piece 8 and one end surface of the circular arc-shaped long groove 7, and as shown in FIG.
is always biased clockwise.

A half engagement step 10a and a full engagement step 10b are formed on the circumferential surface of the latch L. A ratchet 11 is mounted on the cover plate 3 via a shaft 13. The latch 11 has its engaging pawl 12 successively engaged with each of the engaging steps 10a and 10b to prevent the latch L from being reversed. The latch 11 is provided with a spring 14 that presses the engaging pawl 12 against the latch peripheral surface. A long hole 15 is formed at one end of the ratchet 11.

When the striker S enters the guide slit 4 in FIG. 3, it engages with the recess 6 and rotates the latch L counterclockwise, causing the engagement pawl 12 to engage with the half engagement step 10a. After passing through the engaged state, it engages with the full engagement step portion 10b and is fully locked. To release this state, rotate the ratchet 11 in the direction of arrow A in FIG.
Just move it away from 0b.

As shown in FIG. 4, the body 2 is formed with a hollow protuberance 17 that covers the guide slit 4. A back plate 19 is attached to the back surface (upper surface as viewed in FIG. 4) of the body 2 as shown in FIG. 1.
The shaft 5 of the latch L passes through the body 2 and projects to the back surface, and is caulked to the back plate 19. A flange 21 is attached to one end of the back plate 19.
form. A rising wall 26 is formed on one side of the back plate 19. A shaft 30 is rotatably attached to the back plate 19, and a lock lever 31 is fixed to the shaft 30.

A rising portion 32 is provided at one end of the lock lever 31.
is formed, and an engagement protrusion 33 is made to protrude laterally from the rising portion 32. A fork member 51 connected to a key cylinder or a sill knob is engaged with the engagement protrusion 33. A forked portion 34 is formed at the other end of the lock lever 31.

One end 37 of a link 36 shown in FIG. 4 is engaged with the elongated hole 15 of the ratchet 11. An abutment piece 38 is made to protrude above the one end 37. The other end of the link 36 is slidably fitted into a guide trough 39 formed integrally with the body 2. A pin 40 is made to protrude upward (backward) from the other end of the link 36, and the pin 40 is engaged with the forked portion 34 of the lock lever 31. Therefore, when the lock lever 31 is rotated around the shaft 30 by the fork member 51 connected to the key cylinder or the sill knob, the link 36 is displaced in its longitudinal direction due to the engagement between the pin 40 and the fork 34, Link link 3
One end 37 of 6 is displaced within the range of elongated hole 15 .

An open lever 42 is rotatably fixed between the body 2 and the back plate 19 by the shaft 13. The open lever 42 is biased clockwise in FIG. 1 by the action of a spring (not shown) wound around the shaft 13.

As shown in FIG. 5, a window 46 having an abutment protrusion 44 and a recess 45 is provided at one end of the open lever 42. As shown in FIG. Inside the window 46 is the link 3.
The contact pieces 38 of No. 6 are made to face. The abutting piece 38 is caused by the displacement of the link 36 in the longitudinal direction, so that the abutting protrusion 44
Alternatively, it selectively faces the recessed portion 45. The other end of the open lever 42 is connected by a pin 48 to an operation link 47 that is connected to an outer handle of a car door. Note that a rotation lever (not shown) connected to the inner handle is engaged with a protrusion 49 formed at one end of the open lever 42.

When the locking device is in the unlocked state, the abutment piece 38 of the link 36 faces the abutment protrusion 44, as shown in FIG. In this state, when the open lever 42 is rotated counterclockwise by operating the handle inside or outside the vehicle, the contact protrusion 4 of the open lever 42
4 presses the abutting piece 38 in the direction shown by arrow B, and one end 37 integrated with the abutting piece 38 engages with the elongated hole 15 of the ratchet 11, so that the latch 11 is aligned with the shaft 1.
3, and engages the engaging pawl 12 of the ratchet 11.
is released from the fully engaged stepped portion 10b of the latch L,
The latch L becomes free and the door is opened.

To switch the lock device in the state shown in FIG. 5 to the locked state, as shown in FIG. , so that the contact piece 38 faces the recessed part 45.
In this state, even if the open lever 42 is rotated counterclockwise, the contact piece 38 only enters the recess 45 and the link 36 does not move downward.
The door won't open.

In addition, in order to release the locked state, the lock lever 31 may be rotated in the opposite direction to return the link 36 to the state shown in FIG. 5 again.

Next, the power operation mechanism, which is the gist of the present application, will be explained in detail.

In FIGS. 1 and 2, 63 is a short cylindrical case, inside which there are teeth 62a on the outer circumferential surface.
A disc-shaped rotary plate 62 having a shape formed therein is housed. The short cylindrical case 63 has an arm 64 on the back plate 19.
A screw 6 is attached to the upper surface of the support plate 65 fixed through the
It is attached by 7. A drive motor M housed in the case 60 and capable of forward and reverse rotation is provided near the case 63 . A pinion 61 is fixed to the output shaft of the drive motor M, and the pinion 61 is meshed with the tooth portion 62a. It is preferable that the case 60 and the short cylindrical case 63 are integrally formed of synthetic resin or the like.

A cam groove 70 is formed on the surface of the rotating plate 62, as shown in FIGS. 7 and 8. The cam groove 7
0 is provided in a "spiral" shape around the center of rotation of the rotating plate 62. This spiral is located at the unlock position abutting portion 70 located farthest from the center of rotation.
a and the lock position abutting portion 70b located at the position closest to the center of rotation. Unlock position abutment part 70a and lock position abutment part 70b
are arranged in parallel in the radial direction of the rotating plate 62. The unlock position abutment portion 70a and the lock position abutment portion 70b communicate with each other through a communication groove 71 extending in the radial direction of the rotating plate 62.

A cover plate 63b is attached to the top surface of the short cylindrical case 63. An opening 72 is formed in the cover plate 63b at a position corresponding to the communication groove 71. The middle of a cam driven lever 75 is rotatably connected to the cover plate 63b by a pivot shaft 74. A cam follower 76 is provided at one end of the cam follower lever 75 to protrude and engage with the cam groove 70 and the communication groove 71 through the opening 72 .

A long hole 77 is formed at the other end of the cam driven lever 75.

The tip of the shaft 30 of the lock lever 31 is a square shaft 7.
9, and one end of the intermediate lever 80 is fitted onto the square shaft 79. As a result, the intermediate lever 80
The lock lever 31 rotates together through the shaft 30. A pin 81 is provided protruding from the other end of the intermediate lever 80, and the pin 81 is engaged with the elongated hole 77.

In the above configuration, when the drive motor M rotates the rotary plate 62 in any direction via the pinion 61, the cam follower 76 engaged with the cam groove 70 rotates along the cam groove 70. board 62
The cam follower lever 75 therefore swings about the pivot shaft 74.

For example, the lock position abutting portion 70b of the cam groove 70
When the rotary plate 62 is rotated counterclockwise in the state shown in FIG. 9 in which the cam follower 76 is in abutment with the cam follower 76, the cam follower 76 finally reaches the unlocked position of the cam groove 70 as shown in FIG. The cam driven lever 75 abuts against the abutting portion 70a, and during this time the cam driven lever 75
Rotate clockwise around 4. This results in
The intermediate lever 80 rotates counterclockwise about the shaft 30 (79), and the lock lever 31 also rotates counterclockwise. By rotating this lock lever 31,
As before, the lock state is toggled.

Note that the state shown in FIG. 9 is a locked state, and the state shown in FIG.
The state shown in Figure 0 is an unlocked state. Therefore, when the cam follower 76 is at the lock position abutment 70b of the cam groove 70, a locked state is obtained, and when the cam follower 76 is at the unlock position abutment 70a of the cam groove 70, an unlocked state is obtained. will be obtained.

Note that when the drive motor M rotates the lock lever 31 between the lock position and the unlock position, the drive motor M rotates the cam follower 76 into the cam groove 7.
It rotates until it hits the unlock position abutment part 70a or the lock position abutment part 70b of 0, and does not stop midway.

When performing manual operation without operating the drive motor M, the operating force is applied to the engagement protrusion 33 of the lock lever 31 by the fork member 51 connected to the key cylinder or the sill knob, as in the conventional case. At this time, the cam driven lever 7
However, since the cam follower 76 moves linearly along the communication groove 71 between the unlock position abutment part 70a and the lock position abutment part 70b, the rotation plate 6 rotates.
2 does not rotate. Therefore, the drive motor M is not rotated during manual operation.

In addition, in the manual operation, the cam follower 7
Since it is assumed that the operation will be stopped without reliably moving the locking position 6 to the unlock position abutting part 70a or the locking position abutting part 70b, it is desirable to attach something equivalent to a known over-center spring. In the present invention, something corresponding to this overcenter spring is referred to as an articulation means.

To explain the articulating means in detail, as shown in FIGS. 8 and 12, the bottom of the communication groove 71 has a
An articulated motion imparting portion 85 raised in a mountain shape is provided, and the cam follower 76 is formed separately from the driven lever 75, and is biased by a spring 86 in the projecting direction. As a result, when the cam follower 76 moves within the communication groove 71, it elastically retreats due to contact with the articulated portion 85, and the cam follower 76 is moved to the unlock position abutting portion 70a or the lock position. Even if the operation is stopped without being reliably moved to the abutting portion 70b, the action of the elasticity of the spring 86 and the inclined surface of the articulating portion 85 causes the cam follower 76 to move to the unlocked position abutting portion 70a or The lock position is reliably moved to the abutting portion 70b. Note that, as described above, when the cam follower 76 is displaced by the drive motor M, the cam follower 76 does not pass through the communication groove 71, so it is not affected by the adjustment means at all.

The configuration of FIG. 12 can also be modified as shown in FIG. 13. In this example, the driven lever 75 and the cam follower 76 are integrally formed, and the articulating portion 8
5 itself is supported so as to be able to sink toward the inside of the rotary plate 62 against the elasticity of the spring 86a.

Next, the action (force increasing effect) of the cam groove 70 on the cam follower 76 will be explained with reference to FIG. In the figure, O1 is the rotation center of the rotary plate 62, P is the contact point between the cam follower 76 and the side wall of the cam groove 70, and the straight line connecting the contact point P and the rotation center O1 is the side wall of the cam groove 70. are not orthogonal. Also, the pivot shaft 74 of the cam follower lever 75 forming the cam follower 76
The center of rotation of is indicated by O2.

Now, when a torque indicated by M ₀ acts on the rotating plate 62, a force F ₀ at point P is applied to the cam follower 76.
acts. This force F ₀ is expressed as F ₀ =M ₀ /l ₀ , where l ₀ is the distance between the center O1 and point P. Further, this force F ₀ is a composite vector of a force component F1 passing through the point P and the center of the cam follower 76 and another force component F2. Therefore, if the pressure angle at point P is θ, then F1=F ₀ /sinθ, and since sinθ is smaller than 1, F1>F _0. Especially when the pressure angle θ is small, the force F1 becomes the force F ₀ It is much larger than that.

Furthermore, if the length of the perpendicular line drawn from point O2 to the line of force F1 is l1, the rotational torque M1 acting on the driven lever 75 is M1=F1×l1, and the rotational torque M1 which is further amplified by the force F1. acts on the driven lever 75. Therefore, even a small motor can sufficiently rotate the driven lever 75.

In the example shown in FIG. 14, the driven lever 89 is provided in the direction of the communication groove 71, and as the rotating plate 62 rotates, the driven lever 89 slides in its longitudinal direction. The driven lever 89 engages with the pin 90 of the lock lever 31, and as the driven lever 89 slides, the lock lever 31 rotates.

Note that the lock lever 31 and the cam follower 76 may be linked together by other mechanisms.

FIG. 15 shows an example in which the cam follower 76 is provided directly on the lock lever 31. The lock lever 31 is provided with an extension arm 31a, and the cam follower 7 is attached to the tip of the extension arm 31a.
6 is provided protrudingly.

In the example described above, the cam grooves 70 of the rotating plate 62 communicate with each other through the communication grooves 71, but if a manual operation mechanism is not provided, the communication grooves 70 communicate with each other as shown in FIG.
1 may be omitted.

Also, the articulation imparting portion 85 in the communication groove 71 is
As shown in the figure, it may be omitted, and instead, a locking lever or the like may be provided with articulating means (an over-center spring, etc.).

In the example of the rotary plate 62 shown in FIG. 18, chamfered portions 71a and 71b are formed on a part of the side wall forming the communication groove 71 without providing an articulating means. As a result, even if the cam follower 76 stops in the middle of the communication groove 71, if the rotary plate 62 is rotated by the motor M, the cam follower 76 will return to the inside of the cam groove 70 via the chamfered portions 71a and 71b. do.

In the example described above, switching between locking and unlocking is performed by rotating the lock lever 31, but the function of the lock lever can also be performed by a member that performs other types of displacement.

It is also possible to use a rotating member that is not plate-shaped instead of the rotating plate, and furthermore, instead of the cam groove,
It is also possible to use means corresponding to cam grooves.

FIG. 19 shows an example in which a cylindrical rotating column is used instead of the rotating plate. This example is similar in principle to the example shown in FIG. 14, and the symbols of the parts shown in FIG.
is added to indicate the corresponding part. A "helical" cam groove 70X is formed on the circumferential surface of the rotating column 62X, and a communication groove 71X is formed between the unlock position abutment part 70aX and the lock position abutment part 70bX. The rotation of the drive motor M is caused by the gear 62 via the pinion 61.
It is transmitted to aX, and the rotating column 62X rotates. As a result, the driven lever 89X that supports the cam follower 76 is displaced in the direction of the arrow, that is, in the axial direction of the rotating column.

Depending on the needs of the design, it is also possible to obtain a displacement in which the displacement in the rotational axis direction is superimposed on the radial displacement of the cam follower as described above.

(Effects) As described above, the present invention includes a lock lever that is displaced between a lock position and an unlock position, a rotating member that is rotated forward and backward by a drive motor, and a cam that is formed around the central axis of rotation of the rotating member. and a cam follower lever that has a cam follower that engages with the cam groove and displaces the lock lever by rotation of the rotating member, and the cam groove displaces the cam follower when the rotating member rotates forward. The motor has a lock position abutment part against which the child abuts, and an unlock position abutment part against which the cam follower abuts when the rotating member is reversed, and the motor has a lock position abutment part against which the cam follower abuts against the lock position abutment part or The locking device continues to rotate until it hits the unlock position abutment, so
Unlike the prior art example, it does not require a cam wheel for a switch or a plurality of switches for stopping motor drive, and can be easily formed, so the overall size can be reduced. In addition, the cam follower 76 has lock position abutting parts 70b, 70bx, or unlock position abutting parts 7
Since it continues to rotate until it hits 0a, 70aX and stops at that position, it has the effect of making a highly accurate locking device.

Further, the cam groove arranges the lock position abutment part and the unlock position abutment part in parallel in the radial direction or rotational axis direction of the rotating member, and prevents the cam driven lever from passing through the cam groove. Since the locking device is configured such that the locking position abutting part and the unlocking position abutting part are communicated with each other by a communication groove so that the locking position abutting part and the unlocking position abutting part can be displaced between the locking position abutting part and the unlocking position abutting part. Once configured, manual switching can be done easily.

[Brief explanation of drawings]

1 is a rear perspective view of the locking device of the present invention, FIG. 2 is a rear view thereof, FIG. 3 is a rear perspective view showing the cover plate and latch ratchet of the same device, and FIG. 4 is a rear perspective view of the locking device of the invention.
The figure is a rear perspective view showing the components on the body of the device;
Fig. 5 is a relational diagram in the unlocked state, Fig. 6 is a relational diagram in the locked state, Fig. 7 is a rear perspective view of the main parts, Fig. 8 is a rear perspective view showing details of the rotary plate, and Fig. 9 10 is an explanatory diagram of switching to the unlocked state, FIG. 11 is an explanatory diagram of the mechanical effect of the force-increasing effect, and FIG. 12 is a sectional view showing the relationship between the communication groove and the cam follower. FIG. 13 is a sectional view of the modified example, FIG. 14 is a plan view showing a modified example of the mechanism between the rotating plate and the lock lever, and FIG. 15 is a rear view showing an example in which the lock lever and the cam driven lever are integrated. FIGS. 16 to 18 are rear perspective views showing different modifications of the rotating plate, and FIG. 19 is a perspective view of essential parts of an embodiment using a rotating column. Explanation of symbols, 2... Body, 3... Cover plate, 4... Guide slit, 5... Shaft, 6... Recessed part, 7... Arc-shaped long groove, 8... Cut and raised piece, 9...
...Compression spring, 10a...Half engagement step, 10b
...Full engagement stepped portion, 11...Ratchet, 12...
...Engagement claw, 13...Shaft, 14...Spring, 15...
Elongated hole, 17...Hollow raised part, 19...Back plate, 21...Flange, 26...Rising wall, 3
0...Shaft, 31...Lock lever, 31a...Extension arm, 32...Rising portion, 33...Engaging protrusion, 3
4...Forked part, 36... Interlocking link, 37... One end, 38... Contact piece, 39... Guide gutter, 40...
Pin, 42...Open lever, 44...Abutting projection, 45...Recessed portion, 46...Window, 47...Operation link, 48...Pin, 49...Protrusion, 60...
Case, 61... Pinion, 62... Rotating plate (rotating member), 62X... Rotating column (rotating member), 62a
...teeth, 62aX...gear, 63...short cylindrical case, 63b...cover plate, 64...arm, 65...support plate, 67...screw, 70, 70X...cam groove,
70a, 70aX...Unlock position abutting part, 7
0b, 70bX...Lock position abutment part, 71, 7
1X... Communication groove, 71a, 71b... Chamfered portion,
72... Opening, 74... Pivot, 75... Cam driven lever, 76... Cam follower, 77... Long hole, 7
9... Square shaft, 80... Intermediate lever, 81... Pin, 85... Articulating section, 86a... Spring, 8
9,89X...Followed lever, 90,90X...Pin, S...Striker, L...Latch, M...Drive motor.

Claims (1)

[Scope of Claims] 1. A lock lever that is displaced between a lock position and an unlock position, a rotating member that is rotated forward and backward by a drive motor, a cam groove formed around a central axis of rotation of the rotating member, and the cam. The cam follower lever has a cam follower that engages with a groove and displaces the lock lever by the rotation of the rotating member, and the cam groove is a lock that the cam follower hits when the rotating member rotates forward. a position abutting portion;
and an unlocking position abutment against which the cam follower abuts when the rotating member rotates in reverse, and the motor continues to rotate until the cam follower abuts against the locking position abutment or the unlocking position abutment. Locking device to continue. 2. In the first aspect of the present invention, the cam groove arranges the lock position abutment portion and the unlock position abutment portion in parallel in the radial direction or rotation axis direction of the rotating member, and The lock position abutment part and the unlock position abutment part are connected to each other by a communicating groove so that the cam driven lever can be displaced between the lock position abutment part and the unlock position abutment part without passing through the cam groove. Communication locking device.