WO2022209139A1

WO2022209139A1 - Door latch device

Info

Publication number: WO2022209139A1
Application number: PCT/JP2022/001053
Authority: WO
Inventors: 伸哉赤木; 浩平山崎
Original assignee: ミネベアミツミ株式会社
Priority date: 2021-03-30
Filing date: 2022-01-14
Publication date: 2022-10-06
Also published as: JP7459374B2; JPWO2022209139A1

Abstract

A door latch device 100 comprises: a fork 10 that rotates between a latch position at which a striker 91 is engaged and an open position at which the engagement is released; a claw 20 that rotates between a lock position at which the fork 10 is locked and a lock release position where the lock is released; a fence block 40 that has a first space V1 on an X1 direction side and a second space V2 on an X2 direction side, the the fork 10 and the claw 20 being rotatably held in the first space V1; a first pin 15 and/or a second pin 25 integrally provided to the fork 10 and/or the claw 20; and a magnetism detection unit 70 disposed in the X2 direction of the fence block 40 so as to face the first pin 15 and/or the second pin 25 when the fork 10 is positioned at the latch position and/or the open position, and/or when the claw 20 is positioned at the lock position and/or the lock release position.

Description

door latch device

The present invention relates to a door latch device.

Patent Document 1 discloses a fork rotatable between a latch position and an open position, and a claw rotatable between a locking position for locking the fork and an unlocking position for releasing the locking. A door latching device is disclosed. The door latch device further includes a pair of levers that rotate integrally with the fork and the claw, respectively, and a plurality of switches operated by cam ridges formed on each of the pair of levers.

In the above door latch device, each switch is turned on/off by operating each switch through each lever as the fork and claw rotate, and the fork and claw are turned on/off based on the on/off of each switch. Each rotational position of the claw is detected.

JP 2016-53247 A

The above door latch device requires a space for arranging the lever with the cam ridge, so it is difficult to reduce the size.

An object of the present invention is to downsize the door latch device.

One aspect of the present invention is
a fork rotatable between a latch position engaged with a striker provided on the vehicle body and an open position disengaged from the striker;
a claw rotatable between a locked position for locking the fork and an unlocked position for unlocking the fork;
It has a first space located in a first direction in a direction orthogonal to the moving direction of the striker and a second space located in a second direction opposite to the first direction, and in the first space a fence block in which the fork and the claw are rotatably held;
a magnetic body integrally provided with at least one of the fork and the claw and extending in the second direction;
When the fork is positioned at least one of the latched position and the open position and/or when the claw is positioned at least one of the locked position and the unlocked position, the magnetic and a magnetic detector arranged in the second direction with respect to the fence block so as to face the body.

According to the present invention, the position of the fork and/or claw can be easily detected by detecting the magnetic body with the magnetic detection section. Moreover, no levers need to be provided on the forks and/or claws. Therefore, since the door latch device does not require a lever that requires a large installation space, the number of parts can be reduced, the layout can be improved, and the size can be easily reduced. In addition, since the magnetic detector is not in contact with the fork and/or the claw, it is not directly affected by the collision between the striker and the fork that occurs when the door is closed, and the durability can be improved.

Furthermore, since the magnetic material is provided integrally with the fork and/or claw, the magnetic material can also be used as a strength member. For example, one end of a spring that biases the claw from the unlocked position to the locked position is locked to the magnetic body, or an external force acts to rotate the claw from the locked position to the unlocked position. may constitute a part.

According to the present invention, the size of the door latch device can be reduced.

1 is a front perspective view of a door latch device according to one embodiment of the present invention; FIG. FIG. 2 is a front view of the door latch device with the first plate omitted; FIG. 2 is a rear perspective view of the door latch device with the circuit portion omitted; The single perspective view of a fence block. The perspective view which shows a circuit part disassembled with a fence block. The front view which shows a 2nd plate, a magnetic body, and a circuit part. FIG. 3 is a side view of the door latch device with fence blocks omitted; Front view of the forks and claws in the open position. Front view of the forks and claws in the half-latched position. The front view of the fork and claw in the open position of the door latch apparatus which concerns on a modification. The front view of the fork and claw in the half latch position of the door latch apparatus which concerns on a modification. The back perspective view of the door latch apparatus which concerns on a further modification. The side view similar to FIG. 7 of the door latch apparatus which concerns on another modification.

A door latch device according to one embodiment of the present invention will be described below with reference to the accompanying drawings. It should be noted that the following description is essentially merely an example, and is not intended to limit the present invention, its applications, or its uses.

FIG. 1 is a front perspective view of a door latch device 100 according to one embodiment of the present invention. As shown in FIG. 1, the door latch device 100 has a fence block 40, a first plate 1 arranged on the front side of the fence block 40, and a circuit section 50 arranged on the rear side of the fence block 40. is doing. FIG. 2 is a front view of the door latch device 100 with the first plate omitted. As shown in FIG. 2, the door latch device 100 has a fork 10 and a claw 20. As shown in FIG.

As will be described later, the fork 10 is rotatable between a latch position (FIG. 2) in which it engages with a striker 91 provided on the vehicle body and an open position (see FIG. 8A) in which engagement with the striker 91 is released. is provided in The claw 20 is rotatably provided between a locking position ( FIG. 2 ) in which it is locked to the fork 10 and an unlocking position (see FIG. 8A ) in which it is unlocked from the fork 10 .

The door latch device 100 keeps the door (not shown) closed by holding the fork 10 engaged with the striker 91 at the latch position by the claw 20 located at the locking position. On the other hand, by moving the fork 10 to the open position by positioning the claw 20 at the unlocked position, the engagement of the fork 10 with the striker 91 is released and the door (not shown) can be opened.

In the following description, in FIG. 1, the direction from the front side to the back side of the door latch device 100 is the X direction, and the direction perpendicular to the X direction and in which the striker 91 moves as the door is opened and closed is the Y direction, the X direction, and the X direction. A direction perpendicular to the Y direction (vertical direction in FIG. 1) is referred to as a Z direction. Regarding the X direction, the front side is the X1 direction, and the rear side is the X2 direction. Regarding the Y direction, in FIG. 1, the left side is the Y1 direction, and the right side is the Y2 direction. Regarding the Z direction, in FIG. 1, the upper side is the Z1 direction, and the lower side is the Z2 direction.

As shown in FIG. 1, the first plate 1 generally extends along a plane parallel to the Y and Z directions and covers the fence block 40 from the X1 direction. The first plate 1 has a striker insertion notch 1a extending in the Y direction and penetrating in the X direction at a substantially central portion in the Z direction. and a second insertion hole 1c located in the Z2 direction and penetrating in the X direction. A striker 91 (see FIG. 2) moves in the Y direction in the striker insertion notch 1a when the door is opened and closed.

FIG. 3 is a perspective view of the door latch device 100 viewed from the rear side, and FIG. 4 is a perspective view of the single fence block 40 viewed from the X1 direction. Note that the circuit section 50 is omitted in FIG. As shown in FIGS. 3 and 4, the fence block 40 has a rectangular cross-sectional shape when viewed from the X direction, and has an outer peripheral wall portion 41 extending in the X direction. It has a partition wall portion 42 which is located in the center and separates the inside of the outer peripheral wall portion 41 on both sides in the X direction.

Inside the fence block 40, a first space V1 is formed in the X1 direction with respect to the partition wall portion 42, and a second space V2 is formed in the X2 direction.

The fence block 40 is provided with a striker insertion groove 43 that is recessed in the X2 direction in the first space V1 and that penetrates the outer peripheral wall portion 41 and extends in the Y direction. The striker insertion groove 43 faces the striker insertion notch 1a formed in the first plate 1 in the X direction.

As shown in FIG. 4, the partition wall portion 42 includes a first insertion hole 44 penetrating in the X direction on the Z1 direction side of the striker insertion groove 43, and an X direction on the Z2 direction side of the striker insertion groove 43. A second insertion hole 45 penetrating through is formed. Further, in the partition wall 42, a first opening 47 penetrating in the X direction around the first insertion hole 44 and a second opening 48 penetrating in the X direction around the second insertion hole 45 are formed. It is

The first opening 47 extends in an arc direction centering on the first insertion hole 44, and curves in the Z2 direction toward the Y2 direction from one end located in the Z1 direction with respect to the first insertion hole 44. there is The second opening 48 extends in an arc centered on the second insertion hole 45, and curves in the Y1 direction toward the Z2 direction from one end located in the Y2 direction with respect to the second insertion hole 45. ing.

Also referring to FIG. 2, the fence block 40 is provided with the fork shaft 3 and the claw shaft 4 that pass through the partition wall portion 42 in the X direction. The fork shaft 3 is inserted through the first insertion hole 44 (see FIG. 4). The claw shaft 4 is inserted through the second insertion hole 45 (see FIG. 4). The fork 10 is rotatably supported on the fork shaft 3 in the first space V1. The claw 20 is rotatably supported on the claw shaft 4 in the first space V1. Therefore, the fork 10 and the claw 20 are rotatably held in the first space V1.

As shown in FIG. 3, the second plate 2 is arranged in the second space V2. In this embodiment, the second plate 2 is made of metal. The second plate 2 extends generally in the Z direction along a plane parallel to the Y and Z directions. The second plate 2 has a first insertion hole 2a penetrating in the X direction at the end in the Z1 direction and a second insertion hole 2b penetrating in the X direction at the end in the Z2 direction. The first insertion hole 2a and the second insertion hole 2b are respectively opposed to the first insertion hole 1b (see FIG. 1) and the second insertion hole 1c (see FIG. 1) formed in the first plate 1 in the X direction. there is

1 and 3, the fork shaft 3 and claw shaft 4 are fixed to the first plate 1 and the second plate 2 at both ends in the X direction. Specifically, the fork shaft 3 and the claw shaft 4 have a fork shaft first end portion 3a and a claw shaft first end portion penetrating the first insertion hole 1b and the second insertion hole 1c of the first plate 1 in the X1 direction. It is fixed to the first plate 1 at 4a by caulking. The fork shaft 3 and the claw shaft 4 are arranged at a fork shaft second end portion 3b and a claw shaft second end portion 4b that pass through the first insertion hole 2a and the second insertion hole 2b of the second plate 2 in the X2 direction. 2 is fixed to the plate 2 by caulking.

As described above, FIG. 2 shows the fork 10 engaged with the striker 91. As shown in FIG. In the state shown in FIG. 2, the fork 10 is positioned at the latch position and is formed in a U shape with an open bottom. The claw 20 is positioned at the locking position and formed in an I shape extending in the Y direction.

The fork 10 includes a first fork 11 extending in the Z direction on the Y1 direction side, a second fork 12 extending in the Z direction on the Y2 direction side, and ends of the first fork 11 and the second fork 12 in the Z1 direction. It has a fork connection part 13 that connects in the direction.

The first fork 11 has a first contact portion 11a formed on the side surface in the Y1 direction at the end in the Z2 direction. The second fork 12 has a second contact portion 12a formed on the side surface in the Y1 direction at the end in the Z2 direction.

The fork connecting portion 13 is formed with an insertion hole 13a penetrating in the X direction. The fork shaft 3 is inserted through the insertion hole 13a. The fork 10 is rotatably supported around the fork shaft 3 in the insertion hole 13a. An extending portion 14 extending in the Z1 direction is formed in the fork connecting portion 13 on the side opposite to the first fork 11 and the second fork 12 across the insertion hole 13a.

An insertion hole 14a is formed in the extending portion 14 so as to penetrate in the X direction. A first pin 15 extending in the X direction is fixed to the insertion hole 14a. The first pin 15 penetrates the partition wall 42 in the X2 direction through the first opening 47 . The first pin 15 is made of a magnetic material. In the present embodiment, the first pin 15 is fixed to the extension portion 14 so as not to be relatively displaceable by crimping the insertion hole 14a at the end on the X1 direction side. For fixing the first pin 15 to the extended portion 14, any means such as press-fitting, fitting by serrations, or the like can be adopted in addition to caulking.

The claw 20 has a base 23 positioned substantially in the center in the Y direction, a first claw 21 extending from the base 23 in the Y2 direction, and a second claw 22 extending from the base 23 in the Y1 direction. An insertion hole 23a is formed through the base 23 in the X direction. The claw shaft 4 is inserted through the insertion hole 23a. The claw 20 is rotatably supported around the claw shaft 4 in the insertion hole 23a.

A fork locking portion 21a that engages with the fork 10 is formed on the end face of the first claw 21 in the Y2 direction. Further, the first claw 21 is formed with an insertion hole 21b penetrating in the X direction on the Z2 direction side of the fork locking portion 21a.

A second pin 25 extending in the X direction is fixed to the insertion hole 21b. The second pin 25 penetrates the partition wall 42 in the X2 direction through the second opening 48 . The second pin 25 is made of a magnetic material. In this embodiment, the second pin 25 is fixed to the first claw 21 so as not to be relatively displaceable by crimping the insertion hole 21b at the end on the X1 direction side. For fixing the second pin 25 to the first claw 21, any means other than caulking, such as press-fitting or fitting by serrations, can be adopted.

Although not shown, an external operation is input to the second claw 22 to rotate the claw 20 to the unlocked position. For example, the second claw 22 may be configured to be rotationally driven by operating a door handle mechanically coupled via wires, or may be rotationally driven by an electrically driven motor. It may be configured as

As shown in FIG. 3, each of the first pin 15 and the second pin 25 is formed in a stepped columnar shape that tapers in steps in the X2 direction. In addition, the first pin 15 and the second pin 25 are not limited to a cylindrical shape, and various cross-sectional shapes such as a polygon can be adopted.

As shown in FIG. 2, the door latch device 100 includes a first spring 5 that urges the fork 10 clockwise around the fork shaft 3 and a second spring 5 that urges the claw 20 counterclockwise around the claw shaft 4 . It further has a spring 6 . The first spring 5 has one end locked to the fence block 40 and the other end locked to the fork 10 . As clearly shown in FIG. 3, the second spring 6 has one end locked to the fence block 40 and the other end locked to the second pin 25 .

FIG. 5 is an exploded perspective view of the fence block 40 and the circuit section 50. FIG. The circuit section 50 has a first cover 51 attached to the fence block 40 in the X2 direction, and a second cover 52 attached to the first cover 51 in the X2 direction. The first cover 51 and the second cover 52 are made of non-magnetic material. In this embodiment, the first cover 51 and the second cover 52 are made of resin.

The first cover 51 closes the second space V2 (see FIG. 3) of the fence block 40 from the X2 direction. The first cover 51 has a first recessed portion 51b recessed in the X1 direction inside the outer peripheral edge portion 51a. The second cover 52 has a second recessed portion 52b recessed in the X2 direction inside the outer peripheral edge portion 52a.

The first concave portion 51b and the second concave portion 52b are configured so as to substantially overlap when viewed from the X direction, and a third space V3 isolated from the surroundings is formed between them. The third space V3 accommodates a circuit board 53 on which a control section for controlling the operation of the door latch device 100 is configured. A plurality of magnetic detection units 70 are mounted on the end surface of the circuit board 53 in the X1 direction. Various devices capable of detecting magnetism, such as a Hall IC and an MR element, can be used as the magnetic detector 70 .

The plurality of magnetic detection units 70 include a first magnetic detection unit 71 and a second magnetic detection unit 72 provided at positions facing the X2 direction end of the first pin 15 in the X direction, The direction end portion includes a third magnetic detection portion 73 provided at a position facing in the X direction.

FIG. 6 is a front view of the circuit section 50, the first and

second pins

15 and 25, and the second plate 2 as seen from the X1 direction. In FIG. 6, the loci of movement of the first and

second pins

15 and 25 accompanying the rotation of the fork 10 and claw 20 are indicated by two-dot chain lines.

In the locus of movement of the first pin 15, the first pin 15 at the end in the Y1 direction is positioned at the latch position, and the first pin 15 at the end in the Y2 direction shows that the first pin 15 is open. The first pin 15 located in the middle of these positions is shown to be located in the half-latched position. On the other hand, in the movement trajectory of the second pin 25, the second pin 25 at the end in the Z1 direction is positioned at the locking position, and the second pin 25 at the end in the Z2 direction is in the unlocked position. position.

Therefore, the first magnetic detector 71 faces the first pin 15 located at the half-latched position in the X direction. The second magnetic detector 72 faces the first pin 15 located at the open position in the X direction. The third magnetic detector 73 faces the second pin 25 positioned at the unlocked position in the X direction.

The second plate 2 will be described in detail with reference to FIG. The second plate 2 has a first surface portion 61 located at the end in the Z1 direction and formed with the first insertion hole 2a, and located at the end in the Z2 direction and formed with the second insertion hole 2b. It has a second surface portion 62 and a third surface portion 63 located between the first surface portion 61 and the second surface portion 62 .

Also referring to FIG. 3 , the third surface portion 63 protrudes one step in the X2 direction from the first surface portion 61 and the second surface portion 62 . That is, a first bending ridgeline 2c is formed between the first surface portion 61 and the third surface portion 63, and a second bending ridgeline 2d is formed between the second surface portion 62 and the third surface portion 63. As shown in FIG.

The second plate 2 includes a first portion 66 positioned in the Z1 direction from the first insertion hole 2a, a second portion 67 extending in the Z2 direction from the first portion 66, and a second bending ridge line 2d extending from the first insertion hole. A third portion 68 extending toward the first insertion hole 2a substantially parallel to the imaginary line L1 connecting the center of the second insertion hole 2b and the center of the second insertion hole 2b, and a second bending portion 68 extending substantially parallel to the imaginary line L1 from the second bending ridgeline 2d. and a fourth portion 69 extending in the direction toward the insertion hole 2b.

The first portion 66 is configured on the first surface portion 61 . The second portion 67 is configured across the first surface portion 61 and the third surface portion 63 . The third portion 68 is configured on the third surface portion 63 . The fourth portion 69 is configured on the second surface portion 62 .

The first portion 66 is formed in a shape that is notched with respect to the shape obtained by extending the second portion 67 in the Z1 direction. Specifically, the first portion 66 has a first outer peripheral edge portion 66a located at an end portion in the Z1 direction when viewed from the X direction, which is formed between the first insertion hole 2a and the first pin associated with the rotation of the fork shaft 3. 15 movement trajectories. In other words, a cutout portion 66b is formed in the first outer peripheral edge portion 66a by cutting out a portion facing the movement locus of the first pin 15 in the X2 direction.

Similarly, the fourth portion 69 is formed in a shape that is notched with respect to the shape obtained by extending the third portion 68 in a direction parallel to the imaginary line L1. Specifically, the fourth portion 69 has a second outer peripheral edge portion 69a located at an end portion in the Y2 direction when viewed from the X direction, and includes the second insertion hole 2b and the second pin associated with the rotation of the claw shaft 4. 25 movement trajectories. In other words, a notch portion 69b is formed in the second outer peripheral edge portion 69a by notching a portion facing the movement locus of the second pin 25 in the X2 direction.

In the second plate 2, the width W2 of the second portion 67 in the Y direction is wider than the width W3 of the third portion 68 in the direction perpendicular to the imaginary line L1. That is, the second plate 2 has enhanced bending rigidity in the X direction due to the third surface portion 63 acting like a rib in cooperation with the first bending ridgeline 2c and the second bending ridgeline 2d.

In particular, the second plate 2 has increased rigidity around the first insertion hole 2a due to the wide second portion 67 . As a result, the second plate 2 tends to effectively resist the Y-direction load input from the striker 91 to the fork 10 when the door is closed.

FIG. 7 is a side view of the door latch device 100 viewed from the Y2 direction, in which the fence block 40 is omitted and the first cover 51 and the second cover 52 are indicated by two-dot chain lines. As shown in FIG. 7, the first pin 15 protrudes in the X2 direction from the first outer peripheral edge portion 66a of the second plate 2. As shown in FIG. The second pin 25 protrudes in the X2 direction from the second outer peripheral edge portion 69a of the second plate 2 .

The magnetic detector 70 faces the first pin 15 or the second pin 25 with the first cover 51 interposed therebetween. The distance D in the X direction between the magnetic detection unit 70 and the first pin 15 or the second pin 25 is the same as the first pin 15 or the second pin 25 facing each other, even if the first cover 51, which is a non-magnetic material, is interposed therebetween. 25 is set to a length that can be detected by magnetism generated from these. Therefore, the distance D can be appropriately set in consideration of the magnetic strength of the first pin 15 and the second pin 25 .

The operation of the door latch device 100 described above will be described.

In the state shown in FIG. 2, the fork 10 is positioned at the latch position and the claw 20 is positioned at the locking position, and the striker 91 is engaged with the fork 10 to close the door (not shown) relative to the vehicle body. maintained at At this time, the fork locking portion 21a of the claw 20 contacts the first contact portion 11a of the fork 10 from the Y1 direction, thereby preventing the first spring 5 from rotating the fork 10 to the open position. It is

At this time, the first pin 15 and the second pin 25 do not face any of the magnetic detection units 70 in the X direction. Therefore, in the latched state in which the door is kept closed, none of the magnetic detectors 70 detects the first pin 15 and the second pin 25 .

Next, as shown in FIG. 8A, when the claw 20 is rotated to the unlocked position by operating a door handle (not shown) or by an actuator (not shown), the locking of the fork 10 by the claw 20 is released. The fork 10 is biased by the first spring 5 (see FIG. 2) to rotate to the open position. As a result, the engagement of the striker 91 with the fork 10 is released, and the door (not shown) can be opened and closed with respect to the vehicle body.

At this time, the first pin 15 faces the second magnetic detection portion 72 from the X direction, and the second pin 25 faces the third magnetic detection portion 73 from the X direction. Therefore, in the open state in which the door can be opened and closed, the second magnetic detector 72 detects the first pin 15 and the third magnetic detector 73 detects the second pin 25 .

Next, as shown in FIG. 8B, when the rotation of the claw 20 to the unlocked position is released, the claw 20 is biased by the second spring 6 (see FIG. 3) to rotate to the locked position. When the door (not shown) is moved in the closing direction from this state, the striker 91 (see FIG. 2) engages the fork 10 and rotates the fork 10 counterclockwise.

At this time, the second fork 12 first pushes down the claw 20 clockwise against the biasing force of the second spring 6, and the second fork 12 climbs over the claw 20 in the Y2 direction. Next, the fork locking portion 21a of the claw 20 contacts the second contact portion 12a of the fork 10 from the Y1 direction. This constitutes a half-latched condition and prevents fork 10 from rotating to the open position.

At this time, the first pin 15 faces the first magnetic detector 71 from the X direction, but both the first pin 15 and the second pin 25 are located in the second and third

magnetic detectors

72 and 73. do not oppose. Therefore, in the half-latch state, the first magnetic detection section 71 detects the first pin 15 and the second and third

magnetic detection sections

72 and 73 do not detect the first pin 15 and the second pin 25 .

From this state, when the striker 91 is further pushed in the Y2 direction, the fork 10 rotates further counterclockwise. At this time, the first fork 11 pushes down the claw 20 clockwise against the biasing force of the second spring 6 (see FIG. 3), and the first fork 11 rides over the claw 20 in the Y2 direction. As a result, the fork locking portion 21a of the claw 20 contacts the first contact portion 11a of the fork 10 from the Y1 direction, and the fork 10 is held at the latch position.

That is, based on the detection results of the first pin 15 and the second pin 25 by the first to third magnetic detection units 71 to 73, the fork 10 is positioned at any of the latched position, the half-latched position, and the open position. The controller provided on the circuit board 53 can detect whether the claw 20 is in the locked position or the unlocked position.

The door latch device 100 according to the embodiment described above has the following effects.

(1) By detecting the first pin 15 and the second pin 25 with the magnetic detector 70, each rotational position of the fork 10 and/or the claw 20 can be easily detected. Moreover, it is not necessary to provide a cam on the fork 10 and/or the claw 20, and furthermore, it is not necessary to provide a switch operated by the cam. Therefore, since the door latch device 100 does not require cams and switches that require a large installation space, the number of parts can be reduced, the layout can be improved, and the size can be easily reduced. In addition, since the magnetic detection unit 70 is not in contact with the fork 10 and/or the claw 20, it is not directly subjected to the impact caused by the collision between the striker 91 and the fork 10 when the door is closed, and the durability can be improved. .

Furthermore, since the fork 10 and the claw 20 are held in the first space V1 with respect to the fence block 40, and the magnetic detection unit 70 is provided in the X2 direction, foreign matter does not enter when the striker 91 is engaged with the fork 10. The magnetic detection unit 70 can be arranged at a position spaced apart in the X2 direction from the obtained first space V1. This makes it easy to protect the magnetic detection unit 70 from foreign matter.

Furthermore, since the first pin 15 and the second pin 25 are provided integrally with the fork 10 and the claw 20, the first pin 15 and the second pin 25 can also be used as strength members. For example, the first pin 15 and the second pin 25 may also serve as input receiving portions to which an external force is input. Further, one end of the second spring 6 can be engaged with the second pin 25 as in the present embodiment. As a result, the claw 20 can be simplified because it is not necessary to provide the claw 20 with a locked portion for locking the one end of the second spring 6 . Similarly, one end of the first spring 5 may be engaged with the first pin 15 .

(2) It further includes a circuit board 53 arranged in the X2 direction with respect to the fence block 40 , and the magnetic detector 70 is arranged on the circuit board 53 .

According to this configuration, since the magnetic detection section 70 can be directly mounted on the circuit board 53, a harness connecting the magnetic detection section 70 and the circuit board 53 is not required. Therefore, the door latch device 100 does not require a space for routing the harness extending from the magnetic detection section 70, and thus can be further miniaturized.

(3) Between the first cover 51 that closes the second space V2 of the fence block 40 from the X2 direction and the first cover 51 that is attached to the first cover 51 on the opposite side of the fence block 40 and the first cover 51 It further includes a second cover 52 forming a third space V3 isolated from the surroundings, and the circuit board 53 is accommodated in the third space V3.

According to this configuration, since the circuit board 53 is accommodated in the third space V3 isolated from the surroundings, the magnetic detection section 70 mounted on the circuit board 53 can be more preferably protected from foreign matter.

(4) A fork shaft first end portion 3a that rotatably supports the fork 10 and is positioned in the X1 direction with respect to the fence block 40, and a fork shaft first end portion 3a that penetrates the fence block 40 in the X2 direction. A fork shaft 3 having a fork shaft second end 3b located at the end extending inwards and a claw shaft second end 3b rotatably supporting the claw 20 and positioned in the X1 direction with respect to the fence block 40. A claw shaft 4 having a first end 4a and a claw shaft second end 4b extending from the claw shaft first end 4a through the fence block 40 in the X2 direction, and a fence block 40 a first plate 1 that supports the fork shaft first end 3a and the claw shaft first end 4a and is positioned in the X2 direction with respect to the fence block 40, a second plate 2 supporting the fork shaft second end 3b and the claw shaft second end 4b;

Cutouts

66b and 69b are provided in portions facing the locus of movement of the first pin 15 and the second pin 25 as the shaft 3 and the claw shaft 4 rotate.

According to this configuration, the movement of the first pin 15 and the second pin 25 accompanying the rotation of the fork shaft 3 and claw shaft 4 is not restricted by the second plate 2 . Furthermore, since the second plate 2 is not arranged between the first pin 15 and the second pin 25 and the magnetic detection section 70 , the second plate 2 does not correspond to the detection of the first pin 15 and the second pin 25 by the magnetic detection section 70 . can reduce the impact of

(5) The second plate 2 is made of metal, and the first pin 15 and the second pin 25 protrude in the X2 direction from the first outer peripheral edge portion 66a and the second outer peripheral edge portion 69a.

According to this configuration, since the first outer peripheral edge portion 66a and the second outer peripheral edge portion 69a of the second plate 2 are located farther from the magnetic detection section 70 than the first pin 15 and the second pin 25, The detection unit 70 can suppress magnetic disturbance that may be caused by the second plate 2 made of metal, and can accurately detect the first pin 15 and the second pin 25 that are closer to each other.

(6) The first pin 15 is provided on the extended portion 14 of the fork 10 located on the opposite side of the fork connecting portion 13 to the first fork 11 and the second fork 12 .

According to this configuration, the first pin 15 is provided on the side of the fork connecting portion 13 opposite to the first fork 11 and the second fork 12 where foreign matter may enter when the striker 91 is engaged with the fork 10 . It is As a result, the first pin 15 can be easily protected from contact and contamination by foreign matter, and the first pin 15 can be accurately detected by the magnetic detector 70 .

(7) The second pin 25 is located on the opposite side of the base 23 of the claw 20 to the second claw 22 configured as an operated portion to which an external force for operating the claw 20 is input. It is provided on the claw 21 .

According to this configuration, the second pin 25 can be provided away from the operated portion to which the external force is input. As a result, an input member that is connected to the operated portion and inputs an external force is not arranged near the second pin 25, so that the influence of the input member on the detection of the second pin 25 by the magnetic detection unit 70 can be reduced. .

It should be noted that the door latch device 100 of the present invention is not limited to the configuration of the above embodiment, and various modifications are possible.

In the above embodiment, the case where the rotational position of one first pin 15 is detected by the first magnetic detector 71 and the second magnetic detector 72 has been described as an example, but the present invention is not limited to this. As shown in FIG. 9, each rotational position of the fork 10 is detected by detecting a plurality of

first pins

17 and 18 having different magnetic strengths with one first magnetic detector 71. may

For example, when the fork 10 is positioned at the open position as shown in FIG. 9A, the open position first pin 17 is provided at a position facing the first magnetic detector 71 with respect to the fork 10, and the pin 17 is shown in FIG. 9B. Thus, the half-latch position first pin 18 may be provided at a position facing the first magnetic detector 71 with respect to the fork 10 when the fork 10 is positioned at the half-latch position.

Here, the magnetism of the open position first pin 17 is different from the magnetism of the half latch position first pin 18 . For example, the magnetism of the open position first pin 17 may be stronger than the magnetism of the half-latched position first pin 18 . As a result, based on the magnetic strength of the first pin 17 at the open position or the first pin 18 at the half-latch position detected by the first magnetic detection unit 71, the control unit detects, for example, a predetermined threshold value to detect the open position. It may be determined whether either the position first pin 17 or the half-latch position first pin 18 is detected.

Accordingly, although not shown, when the fork 10 is positioned at the latch position, the first magnetic detector 71 detects neither the open position first pin 17 nor the half latch position first pin 18.

Also, as shown in FIG. 9A, when the fork 10 is positioned in the open position, the open position first pin 17 faces the first magnetic detector 71, while the half-latched position first pin 18 faces the first magnetic field. It does not face the detection section 71 . At this time, based on the strength of the magnetism detected by the first magnetism detecting section 71, the control section grasps that the open position first pin 17 is detected, and determines that the fork 10 is positioned at the open position. can.

Also, as shown in FIG. 9B, when the fork 10 is positioned at the half-latched position, the half-latched position first pin 18 faces the first magnetic detector 71, while the open position first pin 17 faces the first magnetic detector 71. It does not face the magnetic detector 71 . At this time, based on the strength of the magnetism detected by the first magnetism detector 71, the controller recognizes that the half-latch position first pin 18 has been detected, and the fork 10 is positioned at the half-latch position. Then you can judge.

As another embodiment, only one set of the first pin 15 and the second magnetic detection unit 72 is provided, and the control unit detects the rotation of the first pin 15 accompanying the rotation of the fork 10 in accordance with a predetermined threshold value. The rotational position of the fork 10 may be determined based on the strength of the magnetic field that varies with the magnetic field.

Further, in the above embodiment, the first pin 15 and the second pin 25 are configured to pass through the fence block 40 at the first opening 47 and the second opening 48 in the X direction. Not exclusively. For example, as shown in FIG. 10, instead of the first opening 47, the partition wall portion 42 is recessed in the X2 direction, and the partition wall portion 42 is configured as a groove portion 49 that does not penetrate in the X direction. The first pin 15 may be configured to extend in the X2 direction inside.

In this case, in addition to the first cover 51, the groove bottom portion 49a of the groove portion 49 is positioned between the first pin 15 and the magnetic detection portion 70. The intensity of the magnetism of the first pin 15 may be appropriately set so that it can be detected by the facing magnetic detector 70 even when the first cover 51 and the groove bottom 49a of the groove 49 are sandwiched. By constructing the groove portion 49 instead of the first opening portion 47, foreign matter or the like is prevented from entering the second space V2 from the first space V1 through the first opening portion 47. Easier to protect from

Further, in the above embodiment, the first pin 15 is detected by the magnetic detector 70 when the fork 10 is in the half-latched position and the open position, but the configuration is not limited to this. In addition to the above embodiment, a magnetic detector 70 may be further provided so that the first pin 15 is detected even when the fork 10 is positioned at the latch position. Also, at least one of the latched position, the half-latched position and the open position may be detected.

Similarly, in the above embodiment, when the claw 20 is positioned at the unlocked position, the magnetic detector 70 is configured to detect the second pin 25, but the present invention is not limited to this. In addition to the above embodiment, a magnetism detector 70 may be further provided so that the second pin 25 is detected even when the claw 20 is positioned at the locking position. Also, instead of the unlocked position, only the locked position may be detected.

Further, in the above-described embodiment, the claw 20 is rotated manually by a door handle and/or by an actuator. The present invention is particularly well implemented in a latch device, the so-called e-latch.

Further, in the above embodiment, the fork 10 is provided with the first pin 15 and the claw 20 is provided with the second pin 25, but the present invention is not limited to this. Either the fork 10 or the claw 20 may be provided with the first pin 15 or the second pin 25 as a magnetic body. In this case, the magnetic detector 70 may be provided so as to detect the rotational position of the fork 10 or claw 20 provided with either the first pin 15 or the second pin 25 .

In addition, in the above embodiment, the case where the first pin 15 and the second pin 25 each protrude from the second plate 2 toward the X2 direction has been described as an example, but the present invention is not limited to this. As shown in FIG. 11 , the

tip portions

15 a and 25 a of the first pin 15 and the second pin 25 may be positioned on the X1 direction side of the second plate 2 . In this case, the corresponding magnetic detection section 70 may be provided so as to be located on the X1 direction side from the circuit board 53 through the

cutouts

66b and 69b of the second plate 2 . Also, the circuit board 53 itself may be configured to be located on the X1 direction side of the second plate 2 .

Also with this, the rotational positions of the first pin 15 and the second pin 25 can be detected by the magnetic detection section 70 .

The door latch device 100 of the above embodiment may be used as a door lock device that locks a door so that it cannot be opened and unlocks it so that it can be opened.

1 first plate 2 second plate 3 fork shaft 3a fork shaft first end 3b fork shaft second end 4 claw shaft 4a claw shaft first end 4b claw shaft second end 5 first spring 6 second spring 10 Fork 15 First Pin 20 Claw 25 Second Pin 40 Fence Block 42 Partition Part 47 First Opening 48 Second Opening 50 Circuit Part 51 First Cover 52 Second Cover 53 Circuit Board 66a First Peripheral Edge 69a 2 Peripheral Edge 70 Magnetic Detector 91 Striker 100 Door Latch Device V1 First Space V2 Second Space V3 Third Space

Claims

a fork rotatable between a latch position engaged with a striker provided on the vehicle body and an open position disengaged from the striker;
a claw rotatable between a locked position for locking the fork and an unlocked position for unlocking the fork;
It has a first space located in a first direction in a direction orthogonal to the moving direction of the striker and a second space located in a second direction opposite to the first direction, and in the first space a fence block in which the fork and the claw are rotatably held;
a magnetic body integrally provided with at least one of the fork and the claw and extending in the second direction;
When the fork is positioned at least one of the latched position and the open position and/or when the claw is positioned at least one of the locked position and the unlocked position, the magnetic A door latch device comprising: a magnetic detection unit arranged in the second direction with respect to the fence block so as to face the body.
further comprising a circuit board arranged in the second direction with respect to the fence block;
The magnetic detection unit is arranged on the circuit board,
The door latch device according to claim 1.
a first cover that closes the second space of the fence block from the second direction;
a second cover attached to the first cover on the side opposite to the fence block and forming a third space isolated from the surroundings between the first cover and the first cover;
The circuit board is accommodated in the third space,
3. The door latch device according to claim 2.
a first end of a fork shaft that rotatably supports the fork and is positioned in the first direction with respect to the fence block; and a first end of the fork shaft that penetrates the fence block in the second direction. a fork shaft having a fork shaft second end located at the end extending inward;
a first end of a claw shaft that rotatably supports the claw and is positioned in the first direction with respect to the fence block; and a first end of the claw shaft that penetrates the fence block in the second direction. a claw shaft having a claw shaft second end located at the end extending upward;
a first plate positioned in the first direction with respect to the fence block and supporting the fork shaft first end and the claw shaft first end;
a second plate positioned in the second direction with respect to the fence block and supporting the fork shaft second end and the claw shaft second end;
The second plate is provided with a notch portion in which a portion facing the movement trajectory of the magnetic body accompanying rotation of at least one of the fork shaft and the claw shaft is cut out.
The door latch device according to any one of claims 1-3.
The second plate is made of metal,
The magnetic body protrudes in the second direction from the notch,
5. The door latch device according to claim 4.