CN110497831B

CN110497831B - Lock catch unlocking system

Info

Publication number: CN110497831B
Application number: CN201910797388.5A
Authority: CN
Inventors: 潘文明; 黎聪; 唐韵华
Original assignee: Keiper Changshu Seating Mechanisms Co Ltd
Current assignee: Keiper Changshu Seating Mechanisms Co Ltd
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2021-08-13
Anticipated expiration: 2039-08-27
Also published as: CN110497831A

Abstract

The invention provides a lock catch unlocking system which comprises an upper shell and a lower shell connected with the upper shell in a sliding mode, wherein a handle is matched with an inner shaft hole of the upper shell, and a driving mechanism is installed on the handle, wherein the driving mechanism comprises a cam, and a comfort piece, a safety piece and a stopping point pawl which are matched with the cam. The original cylindrical driving mechanism of the unlocking handle is changed into a cam structure, so that time difference is generated among the safety sheet, the comfortable sheet and the stop point pawl in the moving process, the stop point pawl cannot block the movement of the movable stop point, the comfortable sheet cannot fall in advance to block the lock tongue, and the function that the lock catch returns to the first position from the second position is achieved.

Description

Lock catch unlocking system

Technical Field

The invention relates to the field of automobile seats, in particular to a lock unlocking system.

Background

At present, the demand for designing a second-gear lock of a rear backrest of an automobile is increasing in the market. However, in the existing two-gear lock design and development, the unlocking handle driving mechanism is cylindrical, as shown in fig. 1, so that the movable gear point 4 'collides with the gear point pawl 3' in the process of returning to the first-gear locking position after the second-gear locking position is unlocked, and the movable gear point fails (as shown in fig. 2); and in the small interval about to enter the first gear position, the comfort piece 6 'falls down in advance to block the movement of the bolt 5', so that the lock catch cannot return to the first gear position from the second gear position (as shown in fig. 3).

Disclosure of Invention

The invention provides a lock catch unlocking system, aiming at solving the problems that the movement of a movable stop point of a second-gear lock is blocked and a comfortable piece falls in advance to block the movement of a lock tongue.

The invention provides a lock catch unlocking system which comprises an upper shell and a lower shell connected with the upper shell in a sliding mode, wherein a handle is matched with an inner shaft hole of the upper shell, and a driving mechanism is installed on the handle, wherein the driving mechanism comprises a cam, and a comfort piece, a safety piece and a stopping point pawl which are matched with the cam.

The cam comprises an inner cam matched with the comfort piece and an outer cam matched with the stop point pawl, a groove is arranged between the inner cam and the outer cam, and the groove is used for accommodating the safety piece.

The lower shell is provided with an upper shaft hole and a lower shaft hole, a first bearing pin penetrates into the upper shaft hole, and a second bearing pin penetrates into the lower shaft hole.

The comfort piece, the safety piece and the stopping point pawl are sequentially stacked from the lower shell along the axial direction of the first bearing pin.

The driving mechanism further comprises a lock tongue, a gasket and a stop point which are sequentially stacked from the lower shell along the axial direction of the second bearing pin.

The handle is fixedly connected with one end of a handle spring, and the other end of the handle spring is lapped on the upper shell.

The comfortable piece is clamped with a comfortable piece spring, and the other end of the comfortable piece spring is clamped with the lower shell.

The safety sheet is clamped with a safety sheet spring, and the other end of the safety sheet spring is clamped with the lower shell.

The lower shell is connected with one end of a gear point pawl spring in a hanging mode, and the other end of the gear point pawl spring is connected to the gear point pawl in a hanging mode.

The lower shell is clamped with one end of a stop point spring, and the other end of the stop point spring is clamped on the stop point.

The lower shell is clamped with one end of a spring bolt return spring, and the other end of the spring bolt return spring is clamped on the spring bolt.

The cam structure is adopted in the second gear lock driving mechanism, so that time difference is generated among the safety piece, the comfort piece and the stop point pawl in the moving process, the stop point pawl cannot block the movement of the movable stop point, the comfort piece cannot fall in advance to block the lock tongue, and the function that the lock catch returns to the first gear position from the second gear position is realized. In addition, the unlocking handle can control the safety sheet and the comfort sheet and can control the catch point to be grabbed. In addition, the invention does not need to add new parts, compress the shell space or add new assembly process, thus reducing the cost and improving the operation hand feeling.

Drawings

Fig. 1 is a schematic view of a prior art unlocking handle driving structure.

FIG. 2 is a schematic view of a prior art gear and gear pawl.

Fig. 3 is a schematic view of a prior art comfort tab blocking latch.

FIG. 4 is a schematic diagram of a latch release system according to the present invention.

Fig. 5 and 6 are schematic views of the latch actuation mechanism of the present invention.

FIG. 7 is a front view of the latch release system according to the present invention.

Fig. 8 is a schematic view of a cam structure according to the present invention.

Fig. 9 is a schematic view illustrating the operation of the latch bolt of the buckle unlocking system rotating from the second gear to the first gear.

Fig. 10 is a schematic view of the buckle release system with the deadbolt about to enter first gear operation, in accordance with the present invention.

FIG. 11 is a schematic view of the latch release system according to the present invention in a first gear-down state.

Detailed Description

The present invention is further described below in conjunction with the following figures and examples, it being understood that the following examples are intended to illustrate and not to limit the present invention.

The locking and unlocking system of the present invention, as shown in fig. 4, includes an upper housing 91 and a lower housing 92, wherein the upper housing 91 is slidably engaged with the lower housing 92 through a sliding slot structure 95. The upper housing 91 is provided therein with a rotary shaft 10, and the rotary shaft 10 is engaged with the shaft hole of the handle 1 and can rotate relatively. A handle spring 11 is fixed on the handle 1, and the other end of the handle spring 11 is overlapped on the upper housing 91 to provide a rotational restoring force for the handle 1. The handle 1 is also provided with a driving mechanism 13, and the driving mechanism 13 receives acting force from the handle 1 so as to provide driving force for unlocking the lock catch of the automobile seat.

The driving mechanism 13 comprises a cam 2, a stop point pawl 3, a stop point 4, a lock tongue 5, a comfort piece 6 and a safety piece 7. As shown in fig. 5, the comfort plate 6, the safety plate 7, and the catch pawl 3 are stacked in this order from the lower case 92 in the axial direction of the first bearing pin 81, and the first bearing pin 81 is inserted into the upper shaft hole 93. The security leaf spring 61 and comfort leaf spring 71 are both aligned with the upper shaft bore 93 and the comfort leaf spring 61 is located below the security leaf spring 71.

The comfort sheet spring 61 is caught at one end thereof to a catching point of the lower case 92 and at the other end thereof to the comfort sheet 6 to provide a rotational restoring force of the comfort sheet. One end of the safety sheet spring 71 is clamped on the clamping point of the lower shell 92, and the other end is clamped on the safety sheet 7. One end of the shift point pawl spring 31 is hooked on the hook point of the lower case 92, and the other end is hooked on the hook point of the shift point pawl 3.

The stop point and the bolt installation are schematically shown in fig. 6, and the bolt 5, the gasket 12 and the stop point 4 are stacked in the first bearing pin 82 from the lower housing 92 in sequence along the axial direction of the second bearing pin 82, and the second bearing pin 82 penetrates into the lower shaft hole 94. The catch spring 41 and the latch bolt return spring 51 are both aligned with the lower shaft bore 94. One end of the catch point spring 41 is clamped on the clamping point of the lower shell 92, and the other end is clamped on the catch point 4; one end of the latch bolt return spring 51 is clamped on the clamping point of the lower shell 92, and the other end is clamped on the latch bolt 5.

As shown in fig. 7 and 8, the cam 2 comprises an inner cam 21 for cooperating with the comfort tab 6; an outer cam 23 is also included for cooperating with the catch pawl 3. A groove 22 is provided intermediate the inner cam 21 and the outer cam 23, which groove 22 engages the security disc 7 and is located opposite the security disc 7.

According to the latch unlocking system, when the bolt 5 rotates from the second gear to the first gear, as shown in fig. 9, the safety sheet 7 is propped by the arc surface of the bolt 5 to prevent the bolt from falling under the action of the restoring force of the spring, and at the moment, the non-cam side of the driving mechanism 2 is stuck to the U-shaped groove surface of the safety sheet 7 under the action of the spring force and keeps moving synchronously with the safety sheet 7; an outer cam 23 on the driving mechanism 2 props against the stop point pawl 3, so that a gap is kept between the stop point pawl 3 and the stop point 4, and the stop point 4 can slide smoothly;

when the bolt 5 is about to enter the first gear, as shown in fig. 10, the arc surface of the bolt 5 already slides out of the designed rotation range of the safety plate 7, and cannot support the safety plate 7, and the safety plate 7 starts to rotate and fall down. At this time, the driving mechanism 2, the comfort piece 6 and the shift point pawl 3 all rotate for a certain angle until the shift point pawl 3 contacts and abuts against the shift point 4 (at this time, although the contact of the two does not affect the smooth sliding of the shift point 4), and the shift point pawl 3 stops rotating; the non-cam side of the driving mechanism 2 will be dead against the U-shaped groove surface of the catch point pawl 3 and stop rotating; the safety sheet 7 rotates under the action of the spring until contacting the middle groove 22 of the driving mechanism 2, and then stops rotating; at this moment, the inner cam 21 of the driving mechanism 2 supports against the comfort piece 6, so that the comfort piece 6 is prevented from falling in advance to block the movement of the bolt 5, and the bolt 5 is ensured to move to a first gear position.

When the latch unlocking system is in a lock-down state, as shown in fig. 11, at this time, the latch 5 has been rotated into the first-gear position, the catch point 4 has slid through the designed rotation range of the catch point pawl 3, and the catch point pawl 3 will rotate and fall to engage with the catch point 4, and form a first-gear catch point function; the non-cam side of the unlocking handle driving mechanism 2 is tightly attached to the gear point pawl 3, the comfort piece 6 is meshed with the lock tongue 5, and the safety piece 7 falls into a designed position to complete first gear locking.

By applying the cam structure of the driving mechanism, the risk that the movable gear point 4 cannot return to the first gear to cause the gear point function failure of the movable gear point 4 due to the interference between the movable gear point 4 and the gear point pawl 3 when the bolt 5 returns to the first gear from the second gear can be avoided; meanwhile, the cam structure can prevent the comfort piece 6 from falling in advance in the motion process to block the bolt 5 from returning to the first gear position, and the bolt 5 can be ensured to smoothly fall into the first gear position. In addition, the invention does not need to add new parts, compress the shell space or add new assembly process, thus reducing the cost and improving the operation hand feeling.

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 lock catch unlocking system comprises an upper shell and a lower shell connected with the upper shell in a sliding manner, wherein a handle is matched with an inner shaft hole of the upper shell, and a driving mechanism is installed on the handle, the driving mechanism is characterized by comprising a cam, a comfortable piece, a safety piece and a stopping point pawl which are matched with the cam, the cam comprises an inner cam matched with the comfortable piece and an outer cam matched with the stopping point pawl, a groove is arranged between the inner cam and the outer cam and used for accommodating the safety piece, the lower shell is provided with an upper shaft hole and a lower shaft hole, a first bearing pin penetrates into the upper shaft hole, a second bearing pin penetrates into the lower shaft hole, and the comfortable piece, the safety piece and the stopping point pawl are sequentially stacked from the lower shell along the axial direction of the first bearing pin, actuating mechanism still includes certainly down the shell is followed the latch bolt that the axial of second bearing pin stacked in proper order, a gasket and one keep off the point, the last joint of comfortable piece has a comfortable flat spring, this comfortable flat spring other end and lower shell joint, the last joint of safety flat spring has a safety flat spring, this safety flat spring other end and lower shell joint, the shell articulates with the one end of a fender point pawl spring down, and this keeps off a point pawl spring other end articulate keep off on the point pawl, the shell is in with the one end joint of a fender point spring down, this fender point spring other end joint is in keep off on the point, the shell returns the one end joint of spring with the latch bolt down, and this latch bolt returns the spring other end joint and is in on the latch bolt.

2. The latch release system of claim 1 wherein the handle is fixedly attached to one end of a handle spring, the other end of the handle spring overlapping the upper housing.