KR102669681B1 - Multistage locking latch apparatus - Google Patents

Abstract

The present invention relates to a multi-stage latch device that allows multi-stage adjustment of the inclination angle of a vehicle's rear seat, etc. according to the occupant's physical condition or needs, and includes a base bracket; a first lock latch installed on the base bracket to be rotatable about the latch hinge axis, having a first insertion groove formed on one side into which at least a portion of the striker is inserted, and at least one first groove formed on the other side; A second lock latch is installed on the base bracket to be rotatable about the latch hinge axis, has a second insertion groove formed on one side into which at least a portion of the striker is inserted, and has at least one second groove formed on the other side. ; and a first cam having a protrusion formed on a portion of the cam so that it can be selectively inserted into the first groove of the first lock latch or the second groove of the second lock latch.

Description

Multistage locking latch apparatus}

The present invention relates to a multi-stage latch device, and more specifically, to a multi-stage latch device that allows the seat inclination angle of a rear seat of a vehicle to be adjusted in multiple stages according to the physical conditions or needs of the occupants.

In general, the rear seat of a vehicle is a seat that allows passengers to sit behind the driver's seat, i.e., in the second, third, or fourth row of seats, and is capable of being folded to expand the trunk space. For this folding of the rear seat, , a striker is installed on the side of the vehicle body, a latch device that is restrained by the striker is installed in the seat back of the rear seat, and a lever device that releases the restraint of the latch device may be connected to one side of the seat back.

However, the latch device installed in a conventional vehicle is nothing more than a simple locking means that fixes the position of the rear seat back to the vehicle body by locking the latch of the latch device to the striker fixed to the vehicle body, compared to the front seat where the inclination angle of the seat back is adjusted. There was a problem that the passenger's convenience was reduced. In other words, the inclination angle of the seat back of the rear seat equipped with a conventional latch device cannot be adjusted to suit the body shape of the occupant, so there is a problem in that the occupant easily feels fatigued and is unable to maintain a correct posture.

In addition, in order to solve the problems of the conventional latch device, the seat back is adjusted in multiple stages, but most of the multi-stage latch devices currently in use use a single latch with a multi-stage groove, and only one latch carries all the load. Because it has to endure, the binding force of the latch may be reduced by the shock applied during a rear collision of the vehicle, and as a result, the locking action of the seat back becomes unstable and the locking state of the striker may be released arbitrarily, causing various problems.

The present invention is intended to solve various problems including the problems described above, and supports the striker at 4 points while evenly distributing the load using a total of two or more latches including a first lock latch and a second lock latch. The purpose is to provide a multi-stage latch device that is structurally very strong and enables stable locking of the striker. However, these tasks are illustrative and do not limit the scope of the present invention.

A multi-stage latch device according to the spirit of the present invention for solving the above problems includes a base bracket; a first lock latch installed on the base bracket to be rotatable about the latch hinge axis, having a first insertion groove formed on one side into which at least a portion of the striker is inserted, and at least one first groove formed on the other side; A second lock latch is installed on the base bracket to be rotatable about the latch hinge axis, has a second insertion groove formed on one side into which at least a portion of the striker is inserted, and has at least one second groove formed on the other side. ; and a first cam having a protrusion formed on a portion of the cam so that it can be selectively inserted into the first groove of the first lock latch or the second groove of the second lock latch.

In addition, according to the present invention, the first lock latch and the second lock latch are each formed in a plate shape having a first thickness and a second thickness and arranged to overlap each other, and the first cam has the protrusion The third thickness may be thicker than the first thickness or the second thickness so as to be in contact with the first groove of the first lock latch or the second groove of the second lock latch.

Additionally, according to the present invention, the first groove portion of the first lock latch includes: a standby groove portion formed at a standby position of the first lock latch so as to be in contact with the protrusion in a standby mode; In the first-stage mode, a first-stage groove formed at the first-stage engaging position of the first lock latch so as to be engaged with the protrusion; and a two-stage groove formed at the second-stage locking position of the first lock latch so that it can be engaged with the protrusion in a two-stage mode.

In addition, according to the present invention, the second groove portion of the second lock latch includes: a first-stage groove portion formed at the first-stage locking position of the second lock latch so that it can be engaged with the protrusion in the first-stage mode; and a second-stage groove formed at the second-stage locking position of the second lock latch so as to be engaged with the protrusion in the two-stage mode.

In addition, according to the present invention, the first cam has the protrusion formed at the front end and a protruding piece formed at the rear end, and when the protruding piece is pressed, the protrusion rotates around the first cam hinge axis formed at the middle portion. It may be formed in an overall bent shape so that it can be moved backwards.

In addition, according to the present invention, a pressing part is formed on one side, and when rotating forward, the pressing part supports the front end of the first cam so that the protrusion does not retract, and when rotating in reverse, the pressing part protrudes so that the protrusion moves backward. It may further include a second cam that rotates around the second cam hinge axis to pressurize the piece.

Additionally, according to the present invention, when the second cam rotates forward, a stopper that interferes with the protruding piece of the first cam may be formed on the other side to control the rotation angle of the pressing portion.

Additionally, according to the present invention, the second cam may be connected to the wire that transmits the tension of the lever so that it can be reversely rotated.

In addition, according to the present invention, a restoring force is provided in the direction of advancing the protrusion so that the protrusion of the first cam can be inserted into the first groove portion of the first lock latch or the second groove portion of the second lock latch. It may further include a formed first cam spring.

Additionally, according to the present invention, a first latch spring forming a restoring force in a direction in which the first lock latch rotates forward; and a second latch spring that generates a restoring force in a direction in which the second lock latch rotates forward.

In addition, according to the present invention, the upper surface of the first cam is aligned with the lower surface of the first lock latch and the second lock latch so that the striker can be supported at four points by the first lock latch and the second lock latch. It may be in close contact with the lower surface.

Additionally, according to the present invention, the first groove portion of the first lock latch includes: a standby groove portion formed at a standby position of the first lock latch so as to be in contact with the protrusion in a standby mode; In the first-stage mode, a first-stage groove formed at the first-stage engaging position of the first lock latch so as to be engaged with the protrusion; In a two-stage mode, a two-stage groove formed at the second stage locking position of the first lock latch so as to be engaged with the protrusion; and a three-stage groove formed at the third stage locking position of the first lock latch so that it can be engaged with the protrusion in the three-stage mode.

According to some embodiments of the present invention as described above, a total of two or more latches including a first lock latch and a second lock latch are used to evenly distribute the load and support the striker at four points, making it structurally very strong. The striker can be locked firmly and stably, and the latches can be installed compactly so that they overlap each other to increase space utilization. The locking condition is firmly maintained by using two cams that engage with each other in various ways depending on each mode. It can be maintained and has the effect of enabling accurate and smooth operation even when unlocking is released. Of course, the scope of the present invention is not limited by this effect.

1 is a perspective view showing a multi-stage latch device in use according to some embodiments of the present invention.
FIG. 2 is a perspective view showing the multi-stage latch device of FIG. 1.
FIG. 3 is a front perspective view showing internal components of the multi-stage latch device of FIG. 1.
FIG. 4 is a rear perspective view showing internal components of the multi-stage latch device of FIG. 1.
FIG. 5 is an exploded perspective view of parts showing the multi-stage latch device of FIG. 1.
Figures 6 to 10 are side views showing step by step the operation process of the multi-stage latch device of Figure 1.
Figure 11 is a side view showing a multi-stage latch device according to some other embodiments of the present invention.
Figure 12 is a side view showing a multi-stage latch device according to some further embodiments of the present invention.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings.

The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art, and the following examples may be modified into various other forms, and the scope of the present invention is as follows. It is not limited to the examples. Rather, these embodiments are provided to make the present disclosure more faithful and complete and to fully convey the spirit of the present invention to those skilled in the art. Additionally, the thickness and size of each layer in the drawings are exaggerated for convenience and clarity of explanation.

The terms used herein are used to describe specific embodiments and are not intended to limit the invention. As used herein, the singular forms include the plural forms unless the context clearly indicates otherwise. Additionally, when used herein, “comprise” and/or “comprising” means specifying the presence of stated features, numbers, steps, operations, members, elements and/or groups thereof. and does not exclude the presence or addition of one or more other shapes, numbers, operations, members, elements and/or groups.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will now be described with reference to drawings that schematically show ideal embodiments of the present invention. In the drawings, variations of the depicted shape may be expected, for example, depending on manufacturing technology and/or tolerances. Accordingly, embodiments of the present invention should not be construed as being limited to the specific shape of the area shown in this specification, but should include, for example, changes in shape resulting from manufacturing.

Hereinafter, a multi-stage latch device according to various embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing the multi-stage latch device 100 in use according to some embodiments of the present invention, FIG. 2 is a perspective view showing the multi-stage latch device 100 of FIG. 1, and FIG. 3 is a multi-stage latch of FIG. 1. It is a front perspective view showing the internal parts of the device 100, FIG. 4 is a rear perspective view showing the internal parts of the multi-stage latch device 100 of FIG. 1, and FIG. 5 is an exploded view of parts showing the multi-stage latch device 100 of FIG. 1. It is a perspective view.

First, as shown in FIGS. 1 to 5, the multi-stage latch device 100 according to some embodiments of the present invention is installed on one side of the seat frame 1 and largely includes a base bracket (B), It may include a first lock latch 10, a second lock latch 20, a first cam 30, and a second cam 40.

1 to 5, for example, the base bracket B includes a first lock latch 10, a second lock latch 20, a first cam 30, and a second cam 40. It may be an overall box-shaped housing structure in which an internal space is formed inside to accommodate the objects and has sufficient strength and durability to withstand external shocks or loads while supporting them.

More specifically, for example, the base bracket (B) has an internal space formed therein, and a front bracket (B1) in which a partial arc-shaped opening (Ba) is formed on one side to allow the striker (S) to enter and exit, and also a front bracket (B1) An opening (Ba) of the same shape is formed and may include a rear bracket (B2) assembled to the front bracket (B1).

Here, a damper (D) made of an elastic material or elastic body may be installed at the end of the opening (Ba) of the base bracket (B) to cushion the collision with the striker (S).

However, the shape of the base bracket (B) or the configuration of the damper (D) is not necessarily limited to the drawing, and brackets or elastic layers of various shapes can be applied in terms of usage environment or design.

1 to 5, for example, the first lock latch 10 is installed on the base bracket B to be rotatable about the latch hinge axis H1, and has a striker S on one side. ) may be a plate-shaped structure formed in an overall plate shape with a constant thickness, in which a first insertion groove 10a is formed into which at least a portion of the structure is inserted, and at least one first groove portion G1 is formed on the other side.

As shown in FIG. 5, for example, the first lock latch 10 is adjusted by the first cam 30 so that its rotation angles can be fixed in each mode, such as standby mode, first-stage mode, and second-stage mode. It can be locked.

That is, the first groove portion G1 is a standby groove portion G11 formed at the standby position of the first lock latch 10 so that it can contact the protrusion 31 of the first cam 30, which will be described later, during the standby mode. , a first-stage groove (G12) formed at the first-stage locking position of the first lock latch (10) so that it can be engaged with the first-stage protrusion (31) in the first-stage mode, and a protrusion (31) in the second-stage mode. It may include a two-stage groove portion G13 formed at the second-stage locking position of the first lock latch 10 so that it can be engaged in two-stage locking.

Here, the standby groove portion G11 may be a step-shaped stopper corresponding to one surface of the protrusion 31 to prevent the first lock latch 10 from rotating forward in the standby mode, and the first-stage groove portion G12 ) may be a concave groove portion of a concave shape to correspond to the protruding shape of the projection 31 in the first-stage mode, and the second-stage groove portion G13 may be a concave groove portion corresponding to the other surface of the projection 31 in the two-stage mode. It may be a step-shaped stopper.

The shape of these first grooves (G1) corresponds to the overall shape or the shape of one side or the other side of the projection 31 so that it can be rigidly coupled to the projection 31, and is not necessarily limited to the drawing and can be formed in a variety of shapes. there is.

Meanwhile, as shown in FIGS. 1 to 5, the second lock latch 20 is installed on the base bracket B to be rotatable about the latch hinge axis H1, and has the second lock latch 20 on one side. It may be a plate-shaped structure in which a second insertion groove 20a is formed into which at least a portion of the striker S is inserted, and at least one second groove portion G2 is formed on the other side and is formed in an overall plate shape with a constant thickness.

As shown in FIG. 5, for example, the second lock latch 20 is also each locked by the first cam 30 so that its rotation angles can be fixed in each mode, such as 1-stage mode and 2-stage mode. You can.

That is, the second groove G2 is a first-stage groove part G21 formed at the first-stage locking position of the second lock latch 20 so that it can be engaged with the protrusion 31 in the first stage in the first-stage mode. And in the two-stage mode, it may include a two-stage groove portion (G22) formed at the second stage locking position of the second lock latch 20 so that it can be two-stage engaging with the protrusion 31.

Here, the first-stage groove portion G21 may be a step-shaped stopper corresponding to one surface of the protrusion 31 to prevent the second lock latch 20 from rotating forward in the first-stage mode, and the second-stage groove portion (G22) may be a step-shaped stopper corresponding to the other surface of the protrusion 31 in the two-stage mode.

The shape of these second grooves G2 corresponds to the overall shape or the shape of one side or the other side of the projection 31 so that it can be rigidly coupled to the projection 31, and is not necessarily limited to the drawing and can be formed in a variety of shapes. there is.

Meanwhile, as shown in FIG. 5, a spring groove portion (GSP) for installing a spring may be additionally installed in the second lock latch 20. In addition, spring grooves of various shapes, such as grooves or holes, may be formed in the first lock latch 10 or the second lock latch 20.

As shown in FIGS. 1 to 5, the first cam 30 is optionally attached to the first groove G1 of the first lock latch 10 or the second groove G2 of the second lock latch 20. It may be a type of cam structure in which a protrusion 31 is formed on a portion of the cam so that it can be inserted into the cam structure.

More specifically, for example, the first cam 30 has a protrusion 31 formed at the front end, a protrusion 32 is formed at the rear end, and when the protrusion 32 is pressed, the protrusion 31 formed at the middle part is formed. It may be a cam structure formed in an overall bent shape so that the protrusion 31 can be retracted from the first groove G1 or the second groove G2 while rotating about the first cam hinge axis H2.

As shown in FIG. 5, the first lock latch 10 and the second lock latch 20 are formed in a plate shape with a first thickness T1 and a second thickness T2, respectively, and are arranged to overlap each other. , the first cam 30 has a first groove so that the protrusion 31 can contact the first groove (G1) of the first lock latch (10) or the second groove (G2) of the second lock latch (20). It may be a third thickness (T3) thicker than the thickness (T1) or the second thickness (T2).

Preferably, to increase space utilization by evenly distributing the load and reducing wasted thickness, for example, the first thickness (T1) and the second thickness (T2) are the same, and the third thickness is the first thickness (T1). ) and the second thickness (T2) may be the combined thickness.

However, it is not necessarily limited to this, and in order to further reduce the weight, the first thickness (T1) and the second thickness (T2) may be formed differently from each other, or the third thickness (T3) may be larger than the first thickness (T1) and the second thickness may be formed. (T2) Various thicknesses can be applied, such as smaller ones.

As shown in FIGS. 1 to 5, the second cam 40 has a pressing portion 41 formed on one side so that at least a portion of the second cam 40 can be engaged with the first cam 30, and when rotating forward, The pressing part 41 supports the tip of the first cam 30 so that the protrusion 31 does not move backwards, and when reverse rotation, the pressing part 41 presses the protruding piece 32 so that the protrusion 31 moves backward. It may be a type of cam structure that rotates around the second cam hinge axis (H3).

Here, when the second cam 40 rotates forward, a stopper 42 that interferes with the protruding piece 32 of the first cam 30 may be formed on the other side to control the rotation angle of the pressing portion 41. and can be connected to the wire (W) so that it can be reversely rotated by the wire (W) that transmits the tension of the lever (L).

For example, the second cam 40 is connected to the release bracket 43 installed on the rear bracket B2, and the release bracket 43 can be pulled by the wire W.

Therefore, when the user pulls the lever (L) installed on the seat frame (1), tension is transmitted by the wire (W) and the release bracket (43) rotates to rotate the second cam (40). The first cam 30 is rotated by (40) so that the protrusion 31 deviates from the first groove G1 of the first lock latch 10 or the second groove G2 of the second lock latch 20. It can be unlocked in each mode, such as standby mode, first-stage mode, and second-stage mode. Conversely, when the user releases the lever (L) installed on the seat frame (1), the protrusion (31) is released by elastic springs to be described later. is engaged with the first groove (G1) of the first lock latch (10) or the second groove (G2) of the second lock latch (20) to be locked in each mode, such as standby mode, first stage mode, and second stage mode. You can.

Meanwhile, as shown in FIGS. 1 to 5, the multi-stage latch device 100 according to some embodiments of the present invention includes a first latch in which a restoring force is formed in the direction in which the first lock latch 10 rotates forward. The spring E1, the second latch spring E2, which generates a restoring force in the direction in which the second lock latch 20 rotates forward, and the protrusion 31 of the first cam 30 are connected to the first lock latch 10. It further includes a first cam spring (E3) in which a restoring force is formed in the direction of advancing the protrusion (31) so that it can be inserted into the first groove (G1) or the second groove (G2) of the second lock latch (20). can do.

Therefore, as shown in FIGS. 2 to 4, using the first latch spring E1, the second latch spring E2, and the first cam spring E3, the protrusion 31 is in standby mode, 1 In a single mode or a two-stage mode, it can be inserted into the first groove (G1) of the first lock latch (10) or the second groove (G2) of the second lock latch (20) and locked.

FIGS. 6 to 10 are side views showing step-by-step the operation process of the multi-stage latch device 100 of FIG. 1.

As shown in FIGS. 6 to 10, if the operation process of the multi-stage latch device 100 according to some embodiments of the present invention is described in more detail, first, as shown in FIG. 6, the striker (S) In the standby mode before being inserted into the first insertion groove (10a) of the first lock latch (10), the protrusion (31) of the first cam (30) is inserted into the standby groove (G11) of the first lock latch (10). At this time, the pressing portion 41 of the second cam 40 presses the protruding piece 32 of the first cam 30 so that the protrusion 31 is pressed into the first lock latch 10. You can reduce noise and vibration caused by parts collision by keeping them spaced apart from each other.

Subsequently, as shown in FIG. 7, when the user first rotates the seat frame 1 in the direction of the striker S in the one-stage mode, the striker S moves into the first insertion groove of the first lock latch 10 ( 10a) and can be rotated counterclockwise. At this time, the second lock latch 20 is not rotated, but the striker S is firmly attached to the second insertion groove 20a of the second lock latch 20. Meanwhile, the protrusion 31 of the first cam 30 may be engaged with the first stage groove portion G12 of the first lock latch 10, and the second cam 40 may be rotated clockwise. The pressing portion 41 of the second cam 40 can firmly press and support the projection 31 so that the projection 31 does not deviate from the first-stage groove portion G12.

Next, as shown in FIG. 8, when the user pulls the lever L installed on the seat frame 1, tension is transmitted by the wire W to rotate the second cam 40, and the second cam 40 rotates. By rotation of (40), the pressing part 41 of the second cam 40 presses the protruding piece 32 of the first cam 30, causing the protruding part 31 to separate from the first stage groove part G12 and locking. can be released.

Subsequently, as shown in FIG. 9, when the seat frame 1 is rotated secondarily in the direction of the striker S, the striker S moves into the first insertion groove 10a and the second lock of the first lock latch 10. It can be inserted into the second insertion groove 20a of the latch 20 and further rotated counterclockwise, and at this time, the protrusion 31 of the first cam 30 is separated from the first stage groove portion G12 and locked. This released state can be maintained.

Subsequently, as shown in FIG. 10, in the two-stage mode, when the user releases the lever (L), the protrusion 31 of the first cam 30 is in the second stage groove portion G13 and the first lock latch 10. It can be simultaneously engaged with the second stage groove part (G22) of the second lock latch 20, and the second cam 40 is rotated clockwise to prevent the protrusion 31 from being separated from the second stage groove part G13. 2 The pressing portion 41 of the cam 40 can firmly press and support the protrusion 31.

Therefore, a total of two or more latches (10) (20) including the first lock latch (10) and the second lock latch (20) are used to evenly distribute the load and the striker (S) is operated in the first and second mode. ), the two latches (10) and (20) are all in contact, so the striker can be locked structurally and stably, and the latches (10) (20) can be installed compactly so that they overlap each other to increase space utilization. The locking state can be firmly maintained by using two cams (30) and (40) that are variously engaged with each other depending on each mode, and the operation can be performed accurately and smoothly even when unlocking.

Figure 11 is a side view showing a multi-stage latch device 200 according to some other embodiments of the present invention.

As shown in FIG. 11, the multi-stage latch device 200 according to some other embodiments of the present invention is configured such that the striker S is locked at 4 points by the first lock latch 10 and the second lock latch 20. (P1) (P2) (P3) (P4) The upper surface (30F) of the first cam (30) is connected to the lower surface (10F) of the first lock latch (10) and the lower surface of the second lock latch (20) so that it can be supported. It can be installed in close contact with (20F).

Therefore, the striker (S) is supported at four points (P1) (P2) (P3) (P4) by the first lock latch (10) and the second lock latch (20), and the upper surface of the first cam (30) Since (30F) is in close contact with the lower surface (10F) of the first lock latch (10) and the lower surface (20F) of the second lock latch (20), load is applied to the striker (S) due to fatigue load repeated over a long period of time or external shock, etc. Even if it is concentrated, it is first distributed to the first lock latch 10 and the second lock latch 20 that support it at four points (P1) (P2) (P3) (P4), and then secondarily to the first cam (30) And it can be distributed to the second cam 40, so it has a very sturdy structure and has excellent fixing force, and the adhesion between parts is improved to fundamentally prevent noise and vibration caused by interference between parts.

Figure 12 is a side view showing a multi-stage latch device 300 according to some further embodiments of the present invention.

As shown in FIG. 12, the multi-stage latch device 300 according to some other embodiments of the present invention can be configured with, for example, three or more stages, and the first groove portion of the first lock latch 10 ( G1) has a standby groove portion (G11) formed at the standby position of the first lock latch (10) so that it can contact the projection (31) in standby mode, and a standby groove (G11) formed in the standby position of the first lock latch (10), and in the first stage mode, the projection (31) and A first-stage groove portion (G12) formed at the first-stage locking position of the first lock latch 10 so that it can be engaged, and the first lock latch so that it can be engaged with the protrusion 31 in a two-stage mode. A second-stage groove (G13) formed at the second-stage locking position of (10) and a second-stage groove portion (G13) formed at the third-stage locking position of the first lock latch (10) so that it can be engaged with the protrusion (31) in the third-stage mode. It may include a three-stage groove (G14).

Accordingly, by adjusting the number of the first groove portion G1 of the first lock latch 10 or the second groove portion G2 of the second lock latch 20 in various ways, multi-stage locking of not only two stages but also three stages or more can be achieved. It can be made possible.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the attached patent claims.

1: Seat frame
S: Striker
B: Base bracket
Ba: opening
B1: Front bracket
B2: Rear bracket
D: damper
10: first lock latch
H1: Latch hinge axis
10a: First insertion groove
G1: 1st groove
G11: Standby groove
G12: 1st stage groove
G13: 2-stage groove
20: second lock latch
20a: second insertion groove
G2: Second groove
G21: 1st stage groove part
G22: 2nd stage groove
GSP: spring groove
T1: first thickness
T2: second thickness
T3: third thickness
10F, 20F: If
30: 1st cam
31: protrusion
32: Projection piece
H2: 1st cam hinge axis
30F: top surface
40: 2nd cam
41: pressurizing part
42: stopper
43: Release bracket
H3: 2nd cam hinge axis
L: lever
W: wire
E1: first latch spring
E2: Second latch spring
E3: 1st cam spring
100, 200, 300: multi-stage latch device

Claims (12)

base bracket;
a first lock latch installed on the base bracket to be rotatable about the latch hinge axis, having a first insertion groove formed on one side into which at least a portion of the striker is inserted, and at least one first groove formed on the other side;
A second lock latch is installed on the base bracket to be rotatable about the latch hinge axis, has a second insertion groove formed on one side into which at least a portion of the striker is inserted, and has at least one second groove formed on the other side. ; and
a first cam having a protrusion formed on a portion thereof so that it can be selectively inserted into the first groove of the first lock latch or the second groove of the second lock latch; Including,
The first groove portion of the first lock latch is,
a standby groove formed at the standby position of the first lock latch so as to be in contact with the protrusion in standby mode;
a first-stage groove formed at the first-stage engaging position of the first lock latch so as to be engaged with the protrusion in the first-stage mode; and
In a two-stage mode, a two-stage groove formed at the second stage locking position of the first lock latch so as to be engaged with the protrusion;
A multi-stage latch device including. According to claim 1,
The first lock latch and the second lock latch are formed in a plate shape having a first thickness and a second thickness, respectively, and are arranged to overlap each other,
The first cam has a third thickness thicker than the first thickness or the second thickness so that the protrusion can contact the first groove portion of the first lock latch or the second groove portion of the second lock latch, Multi-stage latch device. delete According to claim 1,
The second groove portion of the second lock latch is,
In the first-stage mode, a first-stage groove formed at the first-stage engaging position of the second lock latch so as to be engaged with the protrusion; and
In a two-stage mode, a two-stage groove formed at the second stage locking position of the second lock latch so as to be engaged with the protrusion;
A multi-stage latch device including. base bracket;
a first lock latch installed on the base bracket to be rotatable about the latch hinge axis, having a first insertion groove formed on one side into which at least a portion of the striker is inserted, and at least one first groove formed on the other side;
A second lock latch is installed on the base bracket to be rotatable about the latch hinge axis, has a second insertion groove formed on one side into which at least a portion of the striker is inserted, and has at least one second groove formed on the other side. ; and
a first cam having a protrusion formed on a portion thereof so that it can be selectively inserted into the first groove of the first lock latch or the second groove of the second lock latch; Including,
The first cam is,
The protrusion is formed at the front end, a protrusion is formed at the rear end, and when the protrusion is pressed, the protrusion rotates around the first cam hinge axis formed at the middle portion and is formed in an overall bent shape so that the protrusion can be retracted,
A pressing part is formed on one side, and during forward rotation, the pressing part supports the front end of the first cam so that the protrusion does not retract, and when rotating in reverse, the pressing part presses the protruding piece so that the protrusion moves backward. a second cam rotating about a two-cam hinge axis; A multi-stage latch device further comprising: delete According to claim 5,
A multi-stage latch device in which a stopper that interferes with the protruding piece of the first cam is formed on the other side of the second cam to control the rotation angle of the pressing portion when rotating forward. According to claim 5,
The second cam is connected to the wire that transmits the tension of the lever so that it can be reversely rotated. According to claim 1,
a first cam spring in which a restoring force is formed in a direction to advance the protrusion of the first cam so that the protrusion can be inserted into the first groove of the first lock latch or the second groove of the second lock latch;
A multi-stage latch device further comprising: According to claim 1,
a first latch spring that generates a restoring force in a direction in which the first lock latch rotates forward; and
a second latch spring that generates a restoring force in a direction in which the second lock latch rotates forward;
A multi-stage latch device further comprising: According to claim 1,
A multi-stage latch wherein the upper surface of the first cam is in close contact with the lower surface of the first lock latch and the lower surface of the second lock latch so that the striker can be supported at four points by the first lock latch and the second lock latch Device. According to claim 1,
The first groove portion of the first lock latch is,
In the three-stage mode, a three-stage groove formed at the third stage of the first lock latch so as to be engaged with the protrusion;
A multi-stage latch device further comprising:

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