JP2023152237A - Seat angle adjuster and ratchet wheel for seat angle adjuster - Google Patents

Abstract

To disclose a seat angle adjuster and a ratchet wheel for the seat angle adjuster.SOLUTION: The present invention discloses a ratchet wheel (3) for a seat angle adjuster. The ratchet wheel (3) comprises a base plate (A) having a pressed groove (a), and a peripheral wall of the pressed groove (a) is provided with ratchet teeth (3a) of the ratchet wheel whose depth is greater than thickness of the base plate (A). The present invention further provides a seat angle adjuster. The ratchet wheel (3) of the present invention is press-formed from the base plate (A), the ratchet teeth (3a) of the ratchet wheel is arranged so that depth thereof is larger than the thickness of the base plate (A). The thickness of the base plate (A) is thinner and weight of the base plate (A) is lighter, compared with the prior art, so that weight and thickness of the seat angle adjuster are reduced, and the requirement for light weight is met.SELECTED DRAWING: Figure 1

Description

The present invention relates to the technical field of seats, and specifically relates to a seat angle adjuster and a ratchet wheel for the seat angle adjuster.

With the development trend of energy saving and emission reduction in the automobile industry, car seats need to be lighter and seat angle adjusters need to be lighter as well, with the premise of ensuring safety performance. This is a demand for weight reduction in the automobile industry.

To ensure safety and reduce the weight of the seat angle adjuster, components need to be smaller and thinner.
This objective can also be achieved by selecting high-strength materials, but high-strength materials increase material and manufacturing costs and increase the cost of the seat angle adjuster. It is a problem for those skilled in the art to solve the problem of how to make full use of materials through a more rational structural design and component manufacturing process in order to improve the performance.

The present invention reduces the weight and thickness of the seat angle adjuster by making the ratchet wheel thinner when the depth of the ring gear is the same. The purpose is to provide a ratchet wheel for.

The present invention satisfies the demand for weight reduction by reducing the weight and thickness of the seat angle adjuster by making the ratchet wheel thinner when the depth of the ring gear is the same. Another purpose is to provide containers.

In order to solve the above problems, the present invention provides a ratchet wheel for a seat angle adjuster, the ratchet wheel including a base plate with a press groove.
The peripheral wall of this press groove is provided with ratchet teeth having a depth greater than the thickness of the base plate.

In the seat angle adjuster of the prior art, the depth of the ratchet teeth provided on the ratchet wheel is smaller than the thickness of the material, and the depth of the ratchet tooth of the ratchet is the thickness of the slider ratchet tooth, that is, the depth of the ratchet tooth of the slider. If the thickness of the slider is thick, the tooth height of the ratchet wheel must be deepened, and if the tooth height of the ratchet wheel is deep, the material of the ratchet wheel must be thickened, and the ratchet wheel must be made thicker. increases the thickness and weight of the core member of the seat angle adjuster.
The present invention changes the traditional design method, the ratchet wheel is press-molded from the base plate, and the depth of the ratchet teeth of the ratchet wheel is greater than the thickness of the base plate, and the depth of the ratchet teeth of the ratchet wheel is the same. The material thickness of the ratchet wheel may be thinner, thereby reducing the weight and thickness of the seat angle adjuster and meeting the weight reduction requirements.

The present invention further provides a seat angle adjuster, including a sliding groove plate fixedly connected to the seat cushion, the ratchet wheel, a drive mechanism, and at least one slider.
The ratchet wheel is fixedly connected to the seat backrest, and the inner wall of the sliding groove plate is provided with at least one sliding groove extending in the radial direction.
Further, the sliders are mounted in corresponding manner inside the sliding grooves, and slider ratchet teeth are provided on the outside of the peripheral wall thereof.
Further, the ratchet wheel is attached to the sliding groove plate so as to be relatively rotatable, and ratchet teeth are provided on the inner side of the peripheral wall thereof.
The drive mechanism causes the slider ratchet teeth to mesh with the pawl ratchet teeth by driving the slider to move outward along the direction in which the sliding groove extends, or moves the slider inward. By driving to move, the slider ratchet teeth are separated from the ratchet teeth of the ratchet wheel.

The present invention provides a seat angle adjuster, and since it includes the ratchet wheel, it has the same effect as the ratchet wheel, and will not be overstated here.

A first protrusion is provided on one side of one slider facing the ratchet wheel, a second protrusion is provided on the inner wall of the ratchet wheel, and the second protrusion extends along the circumferential direction. , when the ratchet wheel rotates until a portion of the second protrusion faces the first protrusion in the radial direction, the outer wall of the first protrusion can abut the inner wall of the second protrusion; Preferably, the slider ratchet teeth are disengaged from the ratchet teeth.

The number of sliding grooves provided in the sliding groove plate is five, the sliding grooves are uniformly distributed along the circumferential direction, and the seat angle adjuster includes five sliders. preferable.

A connecting protrusion is provided on one side of the slider facing the ratchet wheel, and the drive mechanism includes a lock cam, an unlock cam, and a drive shaft that are connected to limit the position in the circumferential direction.
A locking surface corresponding to the slider is provided on an outer edge of the lock cam, the unlocking cam has a driving sliding groove extending along the circumferential direction, and the connecting protrusion has a driving sliding groove. Preferably, they are inserted into the grooves so as to correspond to each other.
When the drive shaft rotates, the drive sliding groove can drive the slider to move inward, and when the drive shaft rotates in the opposite direction, the locking surface can drive the slider to move the slider outward. can be driven to.

Preferably, the lock cam and the unlock cam are provided with a rectangular hole in their intermediate portions, and the drive shaft has a rectangular segment inserted into the rectangular hole so as to be circumferentially restricted.

Preferably, the drive mechanism further includes a return spring.
When the drive shaft rotates and the drive sliding groove moves the slider inward, the return spring gradually stores energy.

The inner wall of the sliding groove plate is provided with a notch, and the inner ring of the return spring is fitted onto the rectangular segment to form a circumferential position limit, and the extending end of the return spring is fitted onto the square segment. is preferably inserted into said notch so as to form a circumferential position limit.

A mounting groove communicating with the notch is provided in an intermediate portion of the inner wall of the sliding groove plate, the drive shaft passes through the sliding groove plate so as to be relatively rotatable, and the return spring is connected to the mounting groove. It is preferable that the

Preferably, the joint sleeve further includes an annular joining sleeve, the joining sleeve is fitted onto the outer ring of the sliding groove plate, one side wall thereof is fixedly connected to the sliding groove plate, and the other side wall is fixedly connected to the sliding groove plate. has a gap with the side wall of the ratchet wheel opposite to the sliding groove plate.

FIG. 2 is a schematic diagram of a ratchet wheel for a seat angle adjuster according to an embodiment of the present invention. FIG. 1 is a schematic diagram of the configuration of a seat angle adjuster that is an embodiment of the present invention. FIG. 3 is a schematic diagram of the internal configuration of a ratchet wheel in the seat angle adjuster of FIG. 2; FIG. 3 is a schematic diagram of the configuration of the seat angle adjuster of FIG. 2 with the ratchet wheel removed. FIG. 3 is a schematic configuration diagram in which a lock cam, an unlock cam, and a drive shaft are fixed as one unit in the seat angle adjuster of FIG. 2; FIG. 6 is a schematic diagram of the configuration of FIG. 5 from another angle. FIG. 3 is a schematic diagram of power transmission during the locking process in the seat angle adjuster of FIG. 2; FIG. 3 is a schematic diagram of the configuration of the seat angle adjuster in FIG. 2 in a locked state. FIG. 3 is a schematic diagram of power transmission during the unlocking process in the seat angle adjuster shown in FIG. 2; FIG. 3 is a schematic diagram of the configuration of the seat angle adjuster in FIG. 2 in an unlocked state. FIG. 3 is a schematic diagram of the attachment of a return spring and a drive shaft in the seat angle adjuster of FIG. 2; FIG. 12 is a schematic configuration diagram in which the return spring of FIG. 11 is attached to a sliding groove plate.

In order to understand the invention, the following describes the invention in detail in conjunction with the drawings and examples.

Terms such as "first" and "second" used herein do not imply any particular limitation on order and/or importance, and refer to two or more structures having the same or similar configuration and/or function; Or it is for describing parts.

FIG. 1 is a schematic diagram of a ratchet wheel for a seat angle adjuster according to an embodiment of the present invention.

The present invention provides a ratchet wheel for a seat angle adjuster, and the ratchet wheel 3 includes a base plate A having a press groove a, and the peripheral wall of the press groove a is provided with ratchet teeth 3a. There is.
The depth of the ratchet tooth 3a of the ratchet wheel is H, the thickness of the base plate A is T, and the depth of the ratchet tooth 3a of the ratchet wheel is greater than the thickness of the base plate A, that is, H>T. It is.

In a conventional seat angle adjuster, the depth of the ratchet teeth provided on the ratchet wheel is smaller than the thickness of the material, and the depth of the ratchet teeth of the ratchet wheel is equal to the thickness of the slider ratchet teeth, that is, the thickness of the slider. If the thickness of the slider is thick, the tooth height of the ratchet wheel must be made deep; This necessarily increases the thickness and weight of the core member of the seat angle adjuster.
The present invention changes the traditional design method, the ratchet wheel 3 is press-molded from the base plate A, the depth of the ratchet teeth 3a of the ratchet wheel is greater than the thickness of the base plate A, and the tooth height of the ratchet wheel is the same. In some cases, the thickness of the ratchet material may be thinner.
This reduces the weight and thickness of the seat angle adjuster, meeting the demand for weight reduction.

The invention further provides a seat angle adjuster, comprising a sliding groove plate 2 fixedly connected to the seat cushion, the ratchet wheel, a drive mechanism and at least one slider 1.
The ratchet wheel 3 is fixedly connected to the seat backrest, and the inner wall of the sliding groove plate 2 is provided with at least one sliding groove o extending along the radial direction.
The sliders 1 are attached to the inner sides of the sliding grooves o in correspondence with each other, and slider ratchet teeth 1a are provided on the outer side of the peripheral wall thereof.
Furthermore, the ratchet wheel 3 is attached to the sliding groove plate 2 so as to be relatively rotatable, and ratchet teeth 3a are provided on the inside of the peripheral wall.

The drive mechanism drives the slider 1 to move outward along the extending direction of the sliding groove o, thereby causing the slider ratchet teeth 1a to mesh with the ratchet teeth 3a of the ratchet wheel, thereby realizing locking of the seat backrest. Alternatively, by driving the sliding groove o to move inward, the slider ratchet teeth 1a are separated from the ratchet teeth 3a of the ratchet wheel, and the seat backrest is unlocked, and the passenger can move the seat backrest as necessary. The angle can be adjusted.

The present invention provides a seat angle adjuster, and since it includes the ratchet wheel, it has the same effect as the ratchet wheel, and is not described here in detail.

Referring to FIGS. 2 and 3, FIG. 3 is a schematic diagram of the inner configuration of the ratchet wheel in the seat angle adjuster of FIG. 2.

In the present invention, a first projection 11 is provided on one side of one slider 1 facing the ratchet wheel 3, and one second projection 31 is provided on the inner wall of the ratchet wheel 3.
The second protrusion 31 has an arc-shaped configuration and extends along the circumferential direction of the ratchet wheel 3, and the ratchet wheel 3 is rotated until the second protrusion 31 faces the first protrusion 11 in the radial direction. When moving, the outer wall of the first protrusion 11 can abut the inner wall of the second protrusion 31, and the slider ratchet tooth 1a disengages from the ratchet tooth 3a.

As can be seen from the above, when the first protrusion 11 is brought into contact with the second protrusion 31, the slider 1 is not locked and realizes the folding function of the seat backrest, specifically, the sliding groove plate By adjusting the relative position between the seat backrest 2 and the ratchet wheel 3, the first protrusion 11 and the second protrusion 31 are brought into contact with each other when the seat backrest is in the folded state.
In this way, when sitting, the operator does not need to control the drive mechanism and can directly rotate the seat backrest to the backrest position, which is convenient to operate. When the slider 1 is disengaged from the seat backrest, the slider 1 automatically moves outward under the action of the return spring of the drive mechanism (described in detail below) and engages with the ratchet teeth 3a of the ratchet wheel, thereby locking the seat backrest in the backrest position.
As can be seen, the angle of the backrest position is determined, and when there are multiple seats, the backrest positions of each seat backrest are at the same angle, which is more orderly and provides a better user experience.
Further, in the present invention, one slider 1 having the first protrusion 11 and one second protrusion 31 are arranged, and the ratchet wheel 3 makes one circulation every time it rotates 360°, and the seat The lockable angle is larger and meets some special demands of users.

Referring to FIG. 2, the inner wall of the sliding groove plate 2 is provided with five sliding grooves o extending along the radial direction, and the five sliding grooves o are uniformly distributed along the circumferential direction. The number of sliders 1 included in the seat angle adjuster is five, and the sliders 1 are provided in the sliding grooves o so as to correspond to each other.

When arranged as described above, the sliding grooves o perform a guiding function and move the slider 1 only along the radial direction of the sliding groove plate 2, and the numbers of the sliding grooves o and the sliders 1 are both 5, making it possible to fully utilize the inner space of the seat angle adjuster, maximizing the material strength, and optimizing the matching between the meshing strength of the ratchet teeth and the extrusion strength of the sliding groove.

In reality, the number of sliding grooves o and sliders 1 is not limited, as long as the locking effect is achieved; for example, the number of sliding grooves o and sliders 1 may be four.

2 and 4 to 10, FIG. 4 is a schematic diagram of the configuration of the seat angle adjuster in FIG. 2 with the ratchet wheel removed, and FIG. 5 is a schematic diagram of the lock cam in the seat angle adjuster in FIG. 2. , FIG. 6 is a schematic diagram of the configuration in which the unlock cam and the drive shaft are fixed as one body, FIG. 6 is a schematic diagram of the configuration at another angle of FIG. 4, and FIG. 7 is a locking process in the seat angle adjuster of FIG. 2. FIG. 8 is a schematic diagram of the configuration of the seat angle adjuster in FIG. 2 in a locked state, and FIG. 9 is a schematic diagram of power transmission in the unlocking process of the seat angle adjuster in FIG. 2. FIG. 10 is a schematic diagram of the configuration of the seat angle adjuster of FIG. 2 in an unlocked state.

In the present invention, a connecting protrusion 12 is formed on one side of the slider 1 facing the ratchet wheel 3, and further includes an unlocking cam 5.
The lock cam 4 and the unlock cam 5 are integrally fixed by three position limiting pins, that is, the positions of both are limited in the circumferential direction and can rotate synchronously.
A lock surface 4a corresponding to the slider 1 is provided on the outer edge of the lock cam 4, and the unlock cam 5 has a drive sliding groove 5a of an irregular shape extending along the circumferential direction, and the unlock cam 5 has a drive sliding groove 5a of an irregular shape extending along the circumferential direction. The protrusions 12 are inserted into the driving sliding groove 5a so as to correspond to each other.
As shown in FIG. 7, when the lock cam 4 and the unlock cam 5 rotate in the direction of the arrow, the slider 1 is in the position shown in FIG. 8, and the slider ratchet teeth 1a are engaged with the ratchet teeth 3a of the ratchet wheel. The outer edge locking surface 4a of the locking cam 4 drives the slider 1 to move outward in the radial direction until this point is reached.
As shown in FIG. 9, when the lock cam 4 and the unlock cam 5 rotate in the direction of the arrow, the slider 1 is in the position shown in FIG. 10, and the slider ratchet teeth 1a are separated from the ratchet teeth 3a of the ratchet wheel. Until this point, the drive sliding groove 5a drives the slider 1 to move inward in the radial direction.

The lock cam 4 and the unlock cam 5 are driven by a drive shaft 6 that serves as a power transmission shaft.
Specifically, the lock cam 4 and the unlock cam 5 have a rectangular hole provided in their intermediate portions, the peripheral wall portion of the drive shaft 6 is rectangular, and the rectangular segment of the drive shaft 6 is connected to the lock cam 4 and unlock cam. By being inserted into the rectangular hole No. 5, positional restriction in the circumferential direction is realized.
That is, when the drive shaft 6 rotates, the lock cam 4 and the unlock cam 5 can be rotated synchronously.
Generally, a seat is provided with two seat angle adjusters, so the drive shaft 6 of this embodiment is also arranged in the form of a hollow shaft, and its interior is also rectangular.
This allows a link bar (not shown) to pass through and connect the two drive shafts 6 together, allowing the passenger to rotate one drive shaft 6 with an unlock grip (not shown). When driving, the drive shafts 6 on both sides can rotate synchronously, realizing the purpose of unlocking.

Of course, in order to limit the position of the drive shaft 6, which is the power transmission shaft, and the lock cam 4 and unlock cam 5 in the circumferential direction, it is not possible to adopt a method such as welding the three together. Well, here we are not limited.

2 and 11 to 12, FIG. 11 is a schematic diagram of the installation of the return spring and the drive shaft in the seat angle adjuster of FIG. FIG. 3 is a schematic diagram of a configuration attached to a board.

The seat angle adjuster of the present invention further includes a return spring 7.
The inner ring of the return spring 7 is crimped to the rectangular segment of the drive shaft 6 so as to limit the circumferential position, and the inner wall of the sliding groove plate 2 has a mounting groove and a mounting groove. A notch 2a communicating with the groove is provided, and the middle portion of the mounting groove has a through hole through which the drive shaft 6 passes.
Furthermore, the return spring 7 is provided in the mounting groove of the sliding groove plate 2, and its extending end 71 is inserted into the notch 2a of the sliding groove plate 2 so as to realize circumferential position restriction. Ru.
With this arrangement, when the drive shaft 6 receives a force and rotates in the unlocking direction, the return spring 7 gradually stores energy, and the seatback is in the unlocked state and at the required position. In the case of adjustment, when the acting force applied to the drive shaft 6 is canceled, the drive shaft 6 is moved under the return force of the return spring 7 until the slider ratchet teeth 1a are engaged with the ratchet teeth 3a of the ratchet wheel and the seat is locked. Rotates in the opposite direction due to the action of

Here, the return spring 7 may not be provided, in which case the passenger manually drives the drive shaft 6 to rotate into the locked position and adds a locking arrangement to hold the drive shaft 6 in the locked position. However, its configuration is complicated.
The present invention is more suitable because the seat back is automatically returned to the locked state by arranging the return spring 7, and the operation is simple and the safety is high.

Referring to FIG. 2, it further includes an annular joining sleeve 8.
This joint sleeve 8 is fitted around the outer edge of the sliding groove plate 2, one side thereof is fixedly connected to the sliding groove plate 2, and the other side is connected to the side wall of the ratchet wheel 3 on the opposite side to the sliding groove plate 2. It has a gap.
Thereby, the ratchet wheel 3 and the sliding groove plate 2 are fixed as one body, and separation of the ratchet wheel 3 and the sliding groove plate 2 is prevented.

The gaps described here should ensure that no axial movement of the ratchet wheel 3 occurs and that the rotation of the ratchet wheel 3 is not influenced.

The above introduces the seat angle adjuster and the ratchet wheel for this seat angle adjuster in the present invention, the specification describes the embodiments, and the above description helps to understand the method of the present invention and its gist. It is for the purpose of
Here, improvements may be made to the present invention without departing from the principles of the present invention, and these improvements also fall within the protection scope of the claims of the present invention.

1...Slider 1a...Slider ratchet tooth 11...First protrusion 12...Connection protrusion 2...Sliding groove plate o...Sliding groove 2a...Notch 3...Claw Wheel A...Base plate 3a...Ratchet tooth a...Press groove 31...Second protrusion 4...Lock cam 4a...Lock surface
5...Unlock cam 5a...Drive sliding groove 6...Drive shaft 7...Return spring 71...Extending end 8...Joining sleeve

Claims (10)

A ratchet wheel (3) for a seat angle adjuster,
The ratchet wheel (3) includes a base plate (A) having a press groove (a),
A ratchet wheel (3) characterized in that a peripheral wall of the press groove (a) is provided with ratchet teeth (3a) having a depth greater than the thickness of the base plate (A). comprising a sliding groove plate (2) fixedly connected to the seat cushion, a ratchet wheel (3) according to claim 1, a drive mechanism and at least one slider (1),
The ratchet wheel (3) is fixedly connected to the seat backrest,
The inner wall of the sliding groove plate (2) is provided with at least one sliding groove (o) extending along the radial direction,
The slider (1) is installed so as to correspond to the inside of the sliding groove (o), and slider ratchet teeth (1a) are provided on the outside of the peripheral wall thereof,
The ratchet wheel (3) is attached to the sliding groove plate (2) so as to be relatively rotatable, and the ratchet tooth (3a) is provided on the inner side of the peripheral wall,
The drive mechanism moves the slider ratchet tooth (1a) to the ratchet tooth (3a) by driving the slider (1) to move outward along the extending direction of the sliding groove (o). A seat angle adjuster characterized in that the slider ratchet teeth (1a) are disengaged from the ratchet teeth (3a) by engaging the slider (1) or driving the slider (1) to move inward. . A first protrusion (11) is provided on one side of the slider (1) facing the ratchet wheel (3),
One second protrusion (31) extending along the circumferential direction is provided on the inner wall of the ratchet wheel (3),
When the ratchet wheel (3) rotates until the second protrusion (31) portion faces the first protrusion (11) in the radial direction, the outer wall of the first protrusion (11) The seat angle adjuster according to claim 2, wherein the slider ratchet tooth (1a) is in contact with the inner wall of the ratchet wheel (31), and the slider ratchet tooth (1a) is separated from the ratchet tooth (3a). The number of the sliding grooves (o) provided in the sliding groove plate (2) is five,
The sliding grooves (o) are uniformly distributed along the circumferential direction,
Seat angle adjuster according to claim 2, characterized in that said seat angle adjuster includes five said sliders (1). A connecting protrusion (12) is provided on one side of the slider (1) facing the ratchet wheel (3),
The drive mechanism includes a lock cam (4), an unlock cam (5), and a drive shaft (6) that are connected so as to be limited in position in the circumferential direction,
A lock surface (4a) corresponding to the slider (1) is provided on the outer edge of the lock cam (4),
The unlock cam (5) has a drive sliding groove (5a) extending along the circumferential direction,
The connection protrusions (12) are inserted into the drive sliding grooves (5a) so as to correspond to each other,
When the drive shaft (6) rotates, the drive sliding groove (5a) drives the slider (1) to move inward, and when the drive shaft (6) rotates in the opposite direction, the drive sliding groove (5a) moves the slider (1) inwardly, and when the drive shaft (6) rotates in the opposite direction, the drive sliding groove (5a) moves the slider (1) inward. Seat angle adjuster according to claim 2, characterized in that the surface (4a) drives the slider (1) to move outward. The lock cam (4) and the unlock cam (5) are provided with a square hole in the middle part,
The seat angle adjuster according to claim 5, wherein the drive shaft (6) has a square segment inserted into the square hole so as to be circumferentially limited. The drive mechanism further includes a return spring (7),
When the drive shaft (6) rotates and the drive sliding groove (5a) drives the slider (1) to move inward, the return spring (7) gradually stores energy. The seat angle adjuster according to claim 6, characterized by: A notch (2a) is provided on the inner wall of the sliding groove plate (2),
an inner ring of the return spring (7) is fitted onto the rectangular segment so as to form a circumferential position limit;
The seat angle adjustment according to claim 7, characterized in that the extending end (71) of the return spring (7) is inserted into the notch (2a) so as to form a circumferential position limit. vessel. A mounting groove communicating with the notch (2a) is provided in the middle part of the inner wall of the sliding groove plate (2),
The drive shaft (6) passes through the sliding groove plate (2) so as to be relatively rotatable;
The seat angle adjuster according to claim 8, wherein the return spring (7) is provided in the mounting groove. further comprising an annular joining sleeve (8);
The joining sleeve (8) is fitted onto the outer ring of the sliding groove plate (2), one side wall thereof is fixedly connected to the sliding groove plate (2), and the other side wall is connected to the outer ring of the sliding groove plate (2). The seat angle adjustment according to any one of claims 2 to 9, characterized in that the ratchet wheel (3) has a gap with a side wall opposite to the sliding groove plate (2). vessel.