CN111546949B

CN111546949B - Floor lock

Info

Publication number: CN111546949B
Application number: CN202010462840.5A
Authority: CN
Inventors: 杜俊; 真臻; 印志荣
Original assignee: Yanfeng Adient Seating Co Ltd
Current assignee: Yanfeng International Seating Systems Co Ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2021-09-24
Anticipated expiration: 2040-05-27
Also published as: CN111546949A

Abstract

The invention relates to a floor lock which comprises a base, a ratchet wheel, a pawl, a locking sheet and a stay cable assembly, wherein the ratchet wheel used for locking a steel wire of a vehicle body is pivotally arranged on the base through a ratchet wheel spring, the pawl and the locking sheet matched with the ratchet wheel are respectively and pivotally arranged on the base through the pawl spring and the locking sheet spring, the ratchet wheel is provided with a first ratchet wheel matching surface and a second ratchet wheel matching surface which are intersected, the first ratchet wheel matching surface and the second ratchet wheel matching surface of the ratchet wheel are respectively matched with the pawl and the locking sheet in a locking state, and the stay cable assembly is matched with the pawl and the locking sheet to unlock the steel wire of the vehicle. The floor lock has the advantages of fewer parts, simple structure and low mould cost and manufacturing cost.

Description

Floor lock

Technical Field

The present invention relates to vehicle seats, and more particularly to a floor latch.

Background

It is known that car seats with fold-over functionality are usually equipped with floor latches. The known floor locks often have a large number of parts, a complex structure and high manufacturing costs. Moreover, the known floor lock requires a large unlocking force (e.g., 40-45N) to achieve unlocking while securing a locking strength (e.g., 20N), causing an unsmooth operation.

Disclosure of Invention

The invention provides a floor lock, aiming at solving the problems of complex structure and the like of the floor lock in the prior art.

The floor lock comprises a base, a ratchet wheel, a pawl, a locking sheet and a stay cable assembly, wherein the ratchet wheel used for locking a steel wire of a vehicle body is pivotally arranged on the base through a ratchet wheel spring, the pawl and the locking sheet matched with the ratchet wheel are respectively and pivotally arranged on the base through the pawl spring and the locking sheet spring, the ratchet wheel is provided with a first ratchet wheel matching surface and a second ratchet wheel matching surface which are intersected, the first ratchet wheel matching surface and the second ratchet wheel matching surface of the ratchet wheel are respectively matched with the pawl and the locking sheet in a locking state, and the stay cable assembly is matched with the pawl and the locking sheet to unlock the steel wire of the vehicle body.

Preferably, the locking tab has a bottom surface intersecting with a mating surface, and in the locked condition, the bottom surface of the locking tab is not in contact with the first ratchet mating surface and the mating surface of the locking tab is in contact with the second ratchet mating surface.

Preferably, the locking tab mating surface of the locking tab is disposed concentrically with the second ratchet mating surface of the ratchet.

Preferably, the pawl has intersecting pawl mating surface and pawl arc surface, and in the locked state, the pawl mating surface is in contact with the first ratchet wheel mating surface and the pawl arc surface is not in contact with the second ratchet wheel mating surface.

Preferably, the arc surface of the pawl is eccentrically arranged with the second ratchet wheel matching surface of the ratchet wheel.

Preferably, the base comprises a lock cover, a lock bottom, a ratchet rivet and a pawl rivet, wherein the lock cover and the lock bottom are connected into a whole in a spaced manner, two ends of the ratchet rivet and the pawl rivet are respectively connected to the lock cover and the lock bottom, the ratchet is rotatably mounted on the ratchet rivet through a ratchet spring, and the pawl and the locking sheet are rotatably mounted on the pawl rivet through the pawl spring and the locking sheet spring respectively.

Preferably, the base further comprises a spring hanging angle rivet, two ends of the spring hanging angle rivet are respectively connected to the lock cover and the lock bottom, two opposite ends of the ratchet spring are respectively matched with the ratchet and the spring hanging angle rivet, two opposite ends of the pawl spring are respectively matched with the pawl and the spring hanging angle rivet, and two opposite ends of the locking sheet spring are respectively matched with the locking sheet and the spring hanging angle rivet.

Preferably, the pawl is provided with a connecting arm extending laterally, the locking piece is provided with an abutting arm extending laterally, and the joint of the inhaul cable assembly is inserted into the connecting arm of the pawl to be connected and acts on the abutting arm of the locking piece simultaneously.

The floor lock has the advantages of fewer parts, simple structure and low mould cost and manufacturing cost. Moreover, according to the floor lock disclosed by the invention, the locking strength (such as 20N) is ensured, and meanwhile, the unlocking can be realized only by a small unlocking force (such as 20-25N), so that the floor lock is convenient to operate and the comfort is improved. In addition, the floor lock can realize the elimination of shaking by using a simple structure, and ensures that the lock hook can not shake after the floor lock is locked.

Drawings

FIG. 1 is a schematic view of a deployed state of a car seat with a floor latch according to a preferred embodiment of the present invention installed;

FIG. 2 is a schematic illustration of the vehicle seat of FIG. 1 in a folded condition;

FIG. 3 is an exploded view of the floor latch of FIG. 1;

FIG. 4 shows a side view of the floor latch of FIG. 3 from an unlocked state to a locked state;

FIG. 5 shows the engagement of the ratchet and pawl in the locked condition;

FIG. 6 shows the engagement of the ratchet and locking tab in the locked condition;

FIG. 7 shows the cable assembly of FIG. 3 in engagement with the pawl and locking tab;

fig. 8 shows a side view of the floor lock of fig. 3 in an unlocking momentary state;

FIG. 9 illustrates the sway elimination principle of the floor latch of FIG. 3;

fig. 10 illustrates the strength assurance principle of the floor lock of fig. 3;

FIG. 11 illustrates the eccentric locking mechanism of the pawl of FIG. 3;

fig. 12 shows the principle of reducing the unlocking force of the floor lock of fig. 3.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, a floor latch a according to a preferred embodiment of the present invention is installed at the bottom of a car seat, and when it is required to turn the seat, the floor latch a is unlocked and hidden in the seat after being folded, as shown in fig. 2, the seat is turned, so that the space behind the seat is larger for loading articles or for people to get in and out, etc. When the seat needs to be taken, the seat is turned over in the opposite direction, the floor lock A is locked, and the next unlocking is waited.

As shown in fig. 3, the floor lock a according to the present invention includes a base 1, a ratchet 2, a pawl 3, a locking piece 4, and a cable assembly 5, wherein the base 1 is pivotally mounted at the bottom of the vehicle seat to be folded and hidden in the seat when needed (see fig. 2), the ratchet 2 for locking a body wire B (see fig. 9) is pivotally mounted on the base 1 by a ratchet spring 6, the pawl 3 and the locking piece 4 engaged with the ratchet 2 are pivotally mounted on the base 1 by a pawl spring 7 and a locking piece spring 8, respectively, and the cable assembly 5 is engaged with the pawl 3 and the locking piece 4 to unlock the body wire B.

The base 1 comprises a lock cover 11 and a lock base 12, wherein the lock cover 11 and the lock base 12 are fixedly connected together to form a housing, for example by screws. Ratchet 2, pawl 3, stay 4, ratchet spring 6, pawl spring 7 and stay spring 8 hold in the inside of shell, and the joint 51 of cable assembly 5 stretches into the shell from the outside and cooperates with pawl 3 and stay 4. In the present embodiment, the bottom portions of the lock cover 11 and the lock base 12 are respectively provided with the over-molding 1a, and in the unfolded state as shown in fig. 1, the floor lock a according to the present invention can reduce noise generated by the entrance and exit of the body wire B through the over-molding 1 a. The base 1 further comprises a ratchet rivet 13, a pawl rivet 14 and a spring hook rivet 15, wherein both ends thereof are connected to the lock cover 11 and the lock base 12, respectively. Specifically, referring to fig. 5 and 6, the ratchet 2 is rotatably mounted on a ratchet rivet 13 by a ratchet spring 6, the pawl 3 and the lock plate 4 are rotatably mounted on a pawl rivet 14 by a pawl spring 7 and a lock plate spring 8, respectively, opposite ends of the ratchet spring 6 engage the ratchet 2 and a spring hook rivet 15, respectively, opposite ends of the pawl spring 7 engage the pawl 3 and the spring hook rivet 15, respectively, and opposite ends of the lock plate spring 8 engage the lock plate 4 and the spring hook rivet 15, respectively.

As shown in fig. 4, the bottom of the ratchet 2 has a locking groove 21, the top of the ratchet 2 has a first ratchet matching surface 22 and a second ratchet matching surface 23 which intersect with each other, and in the unlocked state of the floor lock a shown in the left drawing, the locking groove 21 of the ratchet 2 is in an open state under the action of the ratchet spring 6 (see fig. 3), and at this time, the vehicle body steel wire B (see fig. 9) can be pressed in the locking groove 21 to drive the clockwise rotation of the ratchet 2 until the first ratchet matching surface 22 and the second ratchet matching surface 23 respectively match with the pawl 3 and the locking plate 4 to be in the locked state of the floor lock a shown in the right drawing.

As shown in fig. 5, the bottom of the pawl 3 has a pawl mating surface 31 and a pawl arc surface 32 that intersect, and in the locked state shown in the right drawing of fig. 4, the pawl mating surface 31 and the first ratchet mating surface 22 are in contact, and the pawl arc surface 32 and the second ratchet mating surface 23 are not in contact. In addition, the pawl 3 has a laterally projecting connecting arm 33 with a circular hole 3 a.

As shown in fig. 6, the bottom of the lock plate 4 has a lock plate bottom surface 41 and a lock plate engagement surface 42 intersecting each other, and in the locked state shown in the right drawing of fig. 4, the lock plate bottom surface 41 is not in contact with the first ratchet engagement surface 22, and the lock plate engagement surface 42 is in contact with the second ratchet engagement surface 23. In addition, the locking tab 4 has an abutment arm 43 projecting laterally.

As shown in fig. 7, the joint 51 of the cable assembly 5 is inserted into the circular hole 3a of the connecting arm 33 of the pawl 3 to be connected, while the cylindrical surface of the joint 51 acts on the abutting arm 43 of the locking piece 4. When the cable assembly 5 is unlocked upwards, the pawl 3 and the locking piece 4 can be pulled to unlock simultaneously, as shown in fig. 8.

The principle of the floor lock a for eliminating the wobbling will be described with reference to fig. 9. When the floor lock A is in a locking state, the locking piece 4 is under the action of the locking piece spring 8, the ratchet wheel 2 is under the action of the ratchet wheel spring 6, and the locking piece matching surface 42 of the locking piece 4 is in contact with the second ratchet wheel matching surface 23 of the ratchet wheel 2 all the time and keeps in contact. When the ratchet wheel 2 is subjected to downward force F, the ratchet wheel 2 is kept unchanged in position all the time under the action of the locking sheet 4 and cannot shake.

The strength securing principle of the floor lock a will be described below with reference to fig. 10 and 11. When the automobile is impacted, the locking piece 4 is deformed under force, and the ratchet 2 rotates anticlockwise around the ratchet rivet 13 and is in contact with the pawl 3. The pawl arc surface 32 of the pawl 3 and the second ratchet wheel matching surface 23 of the ratchet wheel 2 are eccentrically arranged, point A is the rotation center of the pawl 3, point B is the circle center of the pawl arc surface 32, and the eccentricity is

The eccentric direction of the pawl arc surface 32 is a self-locking direction, so that the pawl arc surface 32 of the pawl 3 is always in contact with the second ratchet wheel matching surface 23 of the ratchet wheel 2, and the pawl 3 cannot be unlocked unless damaged, and the locking strength is ensured.

The principle of reducing the unlocking force of the floor latch a will be described below with reference to fig. 12. If only the pawl (eccentric) is directly contacted with the ratchet wheel, so that great friction force needs to be overcome to complete unlocking during unlocking, the floor lock A disclosed by the invention has the advantages that by adding the locking sheet 4, in a normal use state, the locking sheet matching surface 42 is contacted with the second ratchet wheel matching surface 23 of the ratchet wheel 2, the pawl arc surface 32 of the pawl 3 is not contacted with the second ratchet wheel matching surface 23 of the ratchet wheel 2, when the floor lock A is unlocked, only the friction force between the locking sheet matching surface 42 of the locking sheet 4 and the second ratchet wheel matching surface 23 of the ratchet wheel 2 needs to be overcome, and because the locking sheet matching surface 42 is designed concentrically, the friction force is small, the unlocking force is reduced, and meanwhile, the locking strength is unchanged.

The above embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and various changes may be made in the above embodiments of the present invention. All simple and equivalent changes and modifications made according to the claims and the content of the specification of the present application fall within the scope of the claims of the present patent application. The invention has not been described in detail in order to avoid obscuring the invention.

Claims

1. A floor lock is characterized by comprising a base, a ratchet wheel, a pawl, a locking sheet and a stay cable assembly, wherein the ratchet wheel used for locking a steel wire of a vehicle body is pivotally arranged on the base through a ratchet wheel spring, the pawl and the locking sheet matched with the ratchet wheel are respectively pivotally arranged on the base through the pawl spring and the locking sheet spring, the ratchet wheel is provided with a first ratchet wheel matching surface and a second ratchet wheel matching surface which are intersected, the first ratchet wheel matching surface and the second ratchet wheel matching surface of the ratchet wheel are respectively matched with the pawl and the locking sheet in a locking state, and the stay cable assembly is matched with the pawl and the locking sheet to unlock the steel wire of the vehicle body; the pawl is provided with a pawl matching surface and a pawl arc surface which are intersected, the pawl matching surface is contacted with the first ratchet wheel matching surface in a locking state, and the pawl arc surface is not contacted with the second ratchet wheel matching surface; the locking sheet is provided with a bottom surface of the locking sheet and a matching surface of the locking sheet which are intersected, and in a locking state, the bottom surface of the locking sheet is not contacted with the matching surface of the first ratchet wheel, and the matching surface of the locking sheet is contacted with the matching surface of the second ratchet wheel; the locking piece matching surface of the locking piece and the second ratchet wheel matching surface of the ratchet wheel are concentrically arranged.

2. The floor lock of claim 1, wherein the pawl arc surface of the pawl is eccentrically disposed from the second ratchet wheel engagement surface of the ratchet wheel.

3. The floor lock of claim 1, wherein the base comprises a lock cover, a lock base, a ratchet rivet and a pawl rivet, wherein the lock cover and the lock base are connected as a unit in a spaced apart relationship, wherein the ratchet rivet and the pawl rivet are connected at opposite ends to the lock cover and the lock base, respectively, wherein the ratchet is rotatably mounted to the ratchet rivet by a ratchet spring, and wherein the pawl and the locking plate are rotatably mounted to the pawl rivet by a pawl spring and a locking plate spring, respectively.

4. The floor lock of claim 3, wherein the base further comprises a spring hook rivet, wherein the spring hook rivet is connected at each end to the lock cover and the lock base, wherein the ratchet spring engages the ratchet and the spring hook rivet at each end, wherein the pawl spring engages the pawl and the spring hook rivet at each end, and wherein the locking tab spring engages the locking tab and the spring hook rivet at each end.

5. The floor lock of claim 1, wherein the pawl has a laterally extending connecting arm and the locking tab has a laterally extending abutment arm, the connector of the cable assembly being inserted into the connecting arm of the pawl for connection while acting on the abutment arm of the locking tab.