WO2011096653A2

WO2011096653A2 - Round recliner for car seat

Info

Publication number: WO2011096653A2
Application number: PCT/KR2011/000264
Authority: WO
Inventors: 정태주; 김상덕
Original assignee: 주식회사 오스템; (주)씨텍
Priority date: 2010-02-05
Filing date: 2011-01-13
Publication date: 2011-08-11
Also published as: KR20110091201A; WO2011096653A3; KR101072790B1

Abstract

The present invention relates to a round recliner for a car seat. A holder (110) has a plurality of spring accommodating portions (118) recessed between plural lock gear guide protrusions (113) which neighbor in the circumference direction, and an embossment (116) protruded to the outer surface of the holder is formed on the other side of each of the spring accommodating portions. The plurality of spring accommodating portions (118) is connected respectively to cam accommodating portions (114) formed inside each of the spring accommodating portions. The each of the spring accommodating portions (118) accommodates and supports a spring (140) so that one end portion (142) of the spring elastically pressurizes a cam (130) to rotate the same. The gear rim accommodating portion of the holder accommodates the gear rim of the sector gear and has the extra gap of 0.03 to 0.05 mm in the radius direction between the gear rim accommodating portion and the gear rim. Thus, the round recliner for car seat can enhance the safety thereof, reduce the weight thereof, and improve the efficiency of space utilization.

Description

Round Recliner for Vehicle Seat

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a round recliner for a vehicle seat, and more particularly, to a round recliner for a vehicle seat in which a compact structure, in particular, a thinner thickness not only lowers weight but also increases space efficiency and improves safety. .

A round recliner is a device for adjusting the angle of rotation of the seatback relative to the seat cushion, mounted on the seat, in particular the seat of the vehicle.

Conventional round recliners have been made in terms of high strength and high rigidity that can withstand external shocks for the safety of the occupants, and accordingly, the components constituting the round recliner are also designed to be large and thick.

However, in recent years, as technologies for achieving eco-friendliness and low fuel consumption have been proposed, a method for reducing weight while improving safety for vehicle seats has been required.

For the same reason, as the demand for compact cars is increasing, the demand for a practical round recliner that can occupy less installation space while improving safety is increasing.

SUMMARY OF THE INVENTION An object of the present invention is to provide a round recliner for a vehicle seat that can reduce weight and improve space efficiency while improving safety.

In order to achieve the above object, the present invention provides a support rim formed on an outer circumference, a gear receiving portion adjacent to the inner side of the support rim, and a plurality of lock gear guide protrusions disposed at a predetermined interval in the circumferential direction adjacent to the inside of the gear receiving portion. A holder having a cam housing formed inwardly of the plurality of lock gear guide protrusions; A plurality of lock gears accommodated in the holder and slid by the plurality of lock gear guide protrusions; A cam accommodated in the cam accommodating portion and configured to pressurize and slide the plurality of lock gears during rotation; A sector gear which is geared to be accommodated in the gear receiving portion, extends inwardly of the gear and covers the plurality of lock gears and the cam to cover the cams, and which is locked or unlocked by the sliding plurality of lock gears; A round recliner for a vehicle seat comprising: a holder having a plurality of spring receptacles formed therebetween in a plurality of lock gear guide protrusions neighboring in a circumferential direction, wherein a back surface of each spring receptacle is an outer surface of the holder; And a plurality of spring receiving portions are connected to the cam receiving portions respectively located inside the spring receiving portions, and springs are received and supported at each spring receiving portion so that one end of each spring rotates the cam. And a gear receiving portion of the holder for receiving a gear of the sector gear. The radially 0.05 [mm] and provides a round recliner for a vehicle seat, characterized in that with clearance within.

Here, the cam receiving portion of the holder is formed to extend the cam guide portion forming the same layer as the plurality of spring receiving portion, the cam is accommodated in the cam receiving portion and the body portion to interact with the plurality of lock gear, Is formed extending from the body portion is received and rotatably supported by the cam guide portion and has a plurality of working projections are arranged at regular intervals in the circumferential direction, each of the spring is one end of the plurality of working projections in the rotation direction It can also be configured to elastically press.

In this case, the sector gear is formed of the first sector gear layer made of the gear, the second sector gear layer made of the cover portion and a third formed of a plurality of engaging projections which are formed at regular intervals in the circumferential direction protruding to the upper surface of the cover portion; The sector gear layer may be formed so that the thickness of the sector gear corresponds to the length from the bottom surface of the first sector gear layer to the top surface of the third sector gear layer.

In addition, the protruding thickness of the plurality of lock gear guide protrusions may be configured to be smaller than the thickness of the plurality of lock gears that are slid guided thereby.

In addition, the cam has a plurality of operating projections for pressing and sliding the plurality of lock gears on the outer circumferential surface, the lock gear is guided by the operating projections and reciprocally slide between the locking position and the unlocking position, the locking The pressing protrusion for contacting and pressurizing the actuating protrusion at the time of positioning may be additionally formed.

In addition, the gear gear of the sector gear is formed with an inner tooth on the inner circumferential surface, the lock gear is formed on the outer circumferential surface of the outer gear engaging with the inner tooth of the gear at the locking position, the outer gear of the lock gear is formed with the inner tooth of the gear gear It may be formed to engage with the internal teeth on the outside of the pitch circle.

In this case, the outer edge of the lock gear may be additionally protruded from the round end portion for reinforcing the end portion thereof, and may engage with the inner tooth through the round end portion.

The sector gear may be heat-treated steel, and the holder may be made of ordinary carbon steel, which is lower in strength than the sector gear.

According to the round recliner for a vehicle seat according to the present invention as described above, the thickness of the holder can be reduced by designing the spring receiving portion of the holder inside the emboss, and the sector gear is also connected to the gears, the cover portion, and the engaging projections. The thickness can be reduced by forming two layers. Accordingly, the overall thickness of the round recliner for the vehicle seat can be reduced, thereby achieving weight reduction and improved space efficiency.

In addition, the clearance between the gear receiving portion of the holder and the gear is set to a minimum within the range where the rotation of the gear is not disturbed, so that the gear is caught by the holder side lock gear guide protrusion during impact from the outside. As a result, the sudden rotation of the sector gear can be prevented and safety can be achieved.

In addition, the thickness of the lock gear guide protrusion is made thinner than the lock gear, so that the lock gear guide protrusion is recessed due to the pressurization of the lock gear during a strong external impact, thereby preventing the seatback from being caught by the sudden rotation of the sector gear. Can be planned.

1 and 2 are an exploded perspective view of the vehicle seat round recliner according to an embodiment of the present invention when viewed from the top and bottom, respectively;

3 is a cross-sectional view showing a coupling state of the round recliner for a vehicle seat of FIG. 1;

4 and 5 are a plan view for explaining the operation of the round recliner for a vehicle seat of FIG.

6 is a perspective view showing one component of a conventional round recliner for a vehicle seat;

7 is a bottom view showing a modification of the round recliner for a vehicle seat according to the embodiment of the present invention;

FIG. 8 is an enlarged view of a portion A of FIG. 7;

9 and 10 are partial plan views showing another modified example of the round recliner for a vehicle seat according to the embodiment of the present invention.

As shown in FIGS. 1 and 2, a round recliner for a vehicle seat according to an exemplary embodiment of the present invention includes a holder 110 and a sector gear 150 coupled to each other up and down, and between them. A plurality of lock gears 120, cams 130, and a plurality of springs 140 are received and supported.

Holder 110 has a support rim (111) formed on the outer periphery, the gear receiving portion 112 adjacent to the inner side of the support rim 111 is formed.

The gear rim 112 receives and rotates the gear 151 of the sector gear 150 to be described later, and the support rim 111 supports the outer surface of the gear 151.

Inside the gear receiving portion 112, a plurality of lock gear guide protrusions 113 are formed to be arranged at regular intervals in the circumferential direction. Each lock gear guide protrusion 113 guides that the lock gear 120 slides during locking and unlocking.

A cam accommodating part 114 for accommodating and supporting the cam 130 is formed inside the plurality of lock gear guide protrusions 113.

The plurality of lock gears 120 are accommodated inside the holder 110, but are seated on the bottom surface 115 such as the plurality of lock gear guide protrusions 113 and guided by the plurality of guide protrusions 113. In the closed state, the slide position is reciprocated between the locked position (see FIG. 4) and the unlocked position (see FIG. 5).

The cam 130 is accommodated in the cam receiving portion 114 of the holder 110 to be rotatably supported, and is integrally rotated by engaging with the operating shaft 10 through the shaft coupling hole 131 of the central portion.

When the cam 130 rotates clockwise, the plurality of lock gears 120 are pressed and slide from the locking position of FIG. 4 to the unlocking position of FIG. 5. In contrast, in the unlocked state of FIG. 5, the plurality of lock gears 120 slide back to the locking position of FIG. 4 due to the counterclockwise rotation of the cam 130.

On the other hand, referring to Figure 2, the holder 110 is a plurality of first emboss (embo, 116) and the second emboss 117 protruding to the outer surface (that is, the lower surface) are arranged so as to be spaced in a circumferential direction, respectively. It is formed is inserted into the coupling hole provided in any one side of the seat cushion and the seat back through these are coupled.

At this time, referring to Figure 1, the holder 110 has a plurality of spring receiving portion 118 is formed between each of the plurality of the lock gear guide protrusion 113 described above, each of the spring receiving portion 118 The back surface is formed to coincide with the first emboss 116 described above.

That is, the accommodating function of the spring 140 and the supporting function of the holder 110 are simultaneously achieved through the spring accommodating part 118 and the first emboss 116 formed integrally with each other.

In addition, each spring accommodating part 118 is connected with the cam accommodating part 114 of the center.

Accordingly, the spring 140 is accommodated in each spring receiving portion 118, the central end 141 of the spring is supported by a support protrusion 119 protruding in the center of the spring receiving portion 118, The outer end portion 142 extends to the inner cam receiving portion 114 to elastically press the cam 130 in one rotational direction.

According to the conventional round recliner, the spring for rotating the cam is arranged to be laminated on the upper surface or the lower surface of the cam, so that the overall thickness of the recliner is designed to be thick. The formation of 118 may reduce the overall thickness of the recliner.

In addition, conventionally designed to rotate the cam with a single spring, the size of the spring, especially the upper and lower width is formed so large that the thickness of the recliner for accommodating it is designed to be thick, according to the present invention a plurality of springs 140 Since the load is divided by the elastic force required for the rotation of the cam 130, the size can also be formed small, so that the thickness of the recliner can be designed thinner than the prior art.

Here, a cam guide portion 119-1 forming the same layer as the plurality of spring receiving portions 118 is extended to the cam receiving portion 114 of the holder 110.

On the contrary, the cam 130 also has a body portion 132 interacting with the lock gear 120 and a plurality of action protrusions extending to the lower side of the body portion 132 to interact with the spring 140. It is formed to be divided by (133).

The plurality of action protrusions 133 are formed on the lower side of the body portion 132 at regular intervals in the circumferential direction and are rotatably supported by the cam guide portion 119-1.

Each action protrusion 133 is rotationally pressed by the outer end 142 of each spring 140 (see FIGS. 4 and 5).

On the other hand, the sector gear 150 is inserted into the coupling hole provided on the other side of the seat cushion and the seat back through a plurality of engaging projections 152 which are formed to protrude to the outer surface (that is, the upper surface) circumferentially spaced at regular intervals To combine.

Referring to FIGS. 1 to 3, the factors for determining the thickness of the sector gear 150 include a gear 151 as a first sector gear layer and a gear 151 as a second sector gear layer. There is a cover portion 153 extending inwardly to cover the plurality of lock gears 120, the cam 130, and the like, and finally, a plurality of protrusions formed on the upper surface of the cover portion 153 as a third sector gear layer. There is a coupling protrusion 152.

That is, the thickness of the sector gear 150 corresponds to the length from the bottom surface of the first sector gear layer to the top surface of the third sector gear layer.

According to the conventional round recliner, a sector gear layer has to be additionally formed in the sector gear to accommodate a spring provided on the upper surface of the cam. However, according to the present invention, such a sector gear layer is unnecessary. The thickness of the gear 150 itself may also be designed thinner than in the prior art.

In addition, in the conventional round recliner, a separate sector gear layer (L in FIG. 6) is formed on the cover part 153 as a means for limiting the range of the reclining angle of the seatback. By excluding the configuration, the thickness of the sector gear 150 can be further reduced.

On the other hand, in the vehicle seat round recliner 100 according to an embodiment of the present invention, the protrusion thickness t1 of the lock gear guide protrusion 113 on the holder 110 side for guiding the lock gear 120 is the lock gear. Characterized in that it is smaller than the thickness (t2) of 120, according to the prior art that the thickness of the lock gear and the lock gear guide projections are the same as the tooth coupling between the internal gear 154 of the lock gear and the sector gear If an impact to the front or rear through the sector gear occurs in the locked state, the lock gear slides in the direction in which the locking is released along the lock gear guide protrusion due to the impact, and the seat back is free as the unlocking state occurs. There was a meeting of events.

On the contrary, according to the present invention in which the protruding thickness t1 of the lock gear guide protrusion 113 is smaller than the thickness t2 of the lock gear 120 as described above, the lock gear 120 and the sector gear When the shock to the front and rear through the sector gear 150 occurs in the interlocking state between the 150 and 150, the sector gear before the lock gear 120 slides along the lock gear guide protrusion 113 by the impact. The lock gear guide protrusion 113 is deformed in the circumferential direction due to the pressurization of the lock gear 120 that has received the rotational force of 150, so that the locking state between the lock gear 120 and the sector gear 150 remains unchanged. Since it can hold | maintain, the phenomenon which the seatback rotates freely can be prevented. Accordingly, the present invention can prevent the accident of the seated occupant due to the rotation of the seat back by inducing the holder 110 side lock gear guide protrusion 113 in the case of a strong external impact.

The upper and lower holders 110 and the sector gears 150 are coupled to each other by the outer circumference of the holder 110 and the sector gear 150, so that the coupling state between the components can be maintained (see FIG. 3).

Operation of the vehicle seat round recliner 100 having the above configuration is made as shown in FIGS. 4 and 5.

4 shows the recliner 100 in a locked state, in which the cam 130 is pressed counterclockwise by the respective spring 140 and crawled by pushing the lock gear 120 to the outside. It is to be engaged with the inner tooth 154 of the gear (151 of FIG. 2) accommodated in the receiving portion (112).

At this time, when the cam 130 is rotated in the clockwise direction by the rotation operation of the operating shaft (10 in FIG. 2), each of the lock gear 120 is slid inward along the lock gear guide protrusion 113, the gear 151 The engagement with the is released and becomes the unlocked state.

Meanwhile, as shown in FIG. 7, the round recliner 100 for a vehicle seat according to an embodiment of the present invention includes a cam (not shown) to reciprocally slide the plurality of lock gears 120 between a locked position and an unlocked position. 130 and a plurality of actuating protrusions 134 formed in the lock position, and a plurality of actuating protrusions 121 protruding from each of the lock gears 120 so as to contact and pressurize the plurality of actuating protrusions 134 at the locking position. It may be.

Accordingly, the actuating protrusion 134 of the cam 130 in the locking position of the lock gear 120 is always maintained in the pressurized state by the pressing protrusion 121, so that the external shock is the sector gear 150 And transmitted to the cam 130 through the lock gear 120 to prevent the locking state of the lock gear 120 from being released as the cam 130 rotates in the unlocking direction (counterclockwise in FIG. 7). Can be.

That is, the external shock transmitted through the lock gear 120 acts as a strong pressure on the actuating protrusion 134 of the pressurizing protrusion 121, thus rather depressing the actuating protrusion 134 to rotate the cam 130 itself. Will be prevented in advance.

In the vehicle seat round recliner 100 according to the embodiment of the present invention, as shown in area A of FIG. 7 or the like, the lock gear 120 in the locked position is geared 151 of the sector gear 150. ) Will be matched with).

FIG. 8 is an enlarged view of the area A, wherein the gear 151 of the sector gear 150 has an inner tooth 154 formed on its inner circumferential surface, and the lock gear 120 is geared on its outer circumferential surface. It can be seen that the outer tooth 122 is engaged with the inner tooth 154 of 151.

Here, the outer tooth 122 of the lock gear 120 is formed to engage with the inner tooth 154 in a pitch circle (p) to be formed with the inner tooth 154 of the gear 151, the The inner tooth 154 may be formed to engage with the inner tooth 154 in a region C outside the pitch circle p (that is, the tooth root side of the inner tooth 154).

For example, the gear 151 through the round end R is formed by additionally protruding the round end R for reinforcement at the end of the outer tooth 122 of the lock gear 120. Can be engaged with the internal tooth (154).

According to this, by reinforcing the strength of the outer tooth 122 of the lock gear 120 it is possible to improve the phenomenon that the failure (failure) occurs in the outer tooth 122 during the transmission of high-strength external force through the sector gear 150.

With the reinforcement of the round end R as described above, the outer tooth 122 of the lock gear 120 has a tooth tip height L extending deeper in the direction of the inner tooth 154 of the gear 151.

On the other hand, the round recliner 100 for a vehicle seat according to an embodiment of the present invention, as shown in Figure 9, the gear receiving portion 112 of the holder 110 is the gear of the sector gear 150 ( While having a space for accommodating 151, it is designed to ensure only 0.04 [mm] as a clearance gap d with the gear 151. In other words, the width of the gear receiving portion 112 in the radial direction, that is, the distance between the outer surface of the gear receiving portion 112 and the inner surface of the support rim 111 is in the width of the gear 151 Compared to 0.02 [mm] is designed to be larger.

Accordingly, the gear receiving portion 112 is set in its radial width so as to leave only a minimum clearance that does not interfere with the accommodation and rotation of the gear 151.

The conventional recliner is designed to secure about 0.16 [mm] as the clearance, whereas the present invention is designed to be narrowly.

According to such a dimensional relationship setting between the gear receiving portion 112 and the gear 151, when the recliner is externally impacted while being mounted on the seat of the vehicle, for example, the sector gear 150 is a holder When the shock is transmitted to the holder 110 by being pushed to the left relative to the 110, as shown in FIG. 10, the outer circumferential surface of the lock gear guide protrusion 113 of the holder 110 is the sector gear. It is pressed by the inner tooth (154 of FIG. 9) of 150 (see 113a) to hold the sector gear 150 so that the sector gear 150 beats the locking force of the lock gear 120 due to the impact and rotates. This can prevent the phenomenon.

If, as in the prior art, the clearance gap d between the gear receiving portion 112 and the gear 151 is designed to be about 1 [mm], the sector gear 150 may have a gear receiving portion when the impact ( Prior to contacting 112, it is first rotated and the seatback is exposed to the accident as it is completely retracted against the seat cushion.

In the present embodiment, the clearance d between the gear receiving portion 112 and the gear 151 is set to 0.02 [mm], but the round recliner for a vehicle seat according to the present invention is limited thereto. If the clearance gap d is set to within 0.05 [mm], the above effects can be achieved.

In addition, in order to further increase the biting effect on the sector gear 150 of the holder 110, it is preferable to set the strength of the sector gear 150 much higher than that of the holder 110.

To this end, the sector gear 150 is made of heat-treated steel, the holder 110 is preferably made of ordinary carbon steel.

The round recliner 100 for a vehicle seat described above is just one embodiment for better understanding of the present invention, and thus the scope of the present invention should not be considered as being limited thereto.

The scope of the invention to the technical scope is defined by the claims and equivalents described below.

Claims

A support rim formed on an outer circumference, a gear receiving portion adjacent to the inner side of the support rim, a plurality of rock gear guide protrusions disposed at regular intervals in a circumferential direction adjacent to the inner side of the gear rim receiving portion, and the plurality of rock gear guide protrusions A holder having a cam receiving portion formed inwardly; A plurality of lock gears accommodated in the holder and slid by the plurality of lock gear guide protrusions; A cam accommodated in the cam accommodating portion and configured to pressurize and slide the plurality of lock gears during rotation; A sector gear which is geared to be accommodated in the gear receiving portion, extends inwardly of the gear and covers the plurality of lock gears and the cam to cover the cams, and which is locked or unlocked by the sliding plurality of lock gears; In the vehicle seat round recliner comprising:

The holder has a plurality of spring receiving portion is formed between each of the plurality of lock gear guide protrusions adjacent in the circumferential direction, the back surface of each spring receiving portion forms an emboss protruding to the outer surface of the holder,

The plurality of spring receiving portions are respectively connected to the cam receiving portions positioned inside, springs are received and supported at each spring receiving portion to elastically press one end of each spring to rotate the cam,

The gear receptacle of the holder for accommodating the gear of the sector gear has a clearance within 0.05 [mm] in the radial direction between the gear and the gear.
The method of claim 1,

The cam receiving portion of the holder extends the cam guide portion forming the same layer as the plurality of spring receiving portions,

The cam is accommodated in the cam receiving portion and the body portion interacting with the plurality of lock gears, a plurality of extending from the body portion is received and rotatably supported in the cam guide portion and arranged in a circumferential direction at a predetermined interval Has the process of action,

Each said spring has said one end part elastically pressurizing any one of the said several operation | work process protrusion in the rotation direction.
The method according to claim 1 or 2,

The sector gear may include a first sector gear layer formed of the gear, a second sector gear layer formed of the cover part, and a third sector gear formed of a plurality of coupling protrusions protruding from an upper surface of the cover part and disposed at regular intervals in the circumferential direction. And a thickness of the sector gear corresponds to a length from a lower surface of the first sector gear layer to an upper surface of the third sector gear layer.
The method of claim 1,

The protruding thickness of the plurality of lock gear guide protrusions is smaller than the thickness of the plurality of lock gears that are slid guided thereby.
The method of claim 1,

The cam is provided with a plurality of operating projections for pressing and sliding the plurality of lock gear on the outer peripheral surface,

The lock gear is guided by the corresponding operation protrusion and reciprocally slides between the locking position and the unlocking position, wherein the locking protrusion for contacting and pressurizing the operating protrusion at the locking position is further protrudingly formed. Recliner.
The method of claim 1,

The gear of the sector gear is formed in the inner peripheral surface,

The lock gear is formed on the outer circumferential surface of the outer gear engaging with the inner tooth of the gear at the locking position,

The outer gear of the lock gear is formed to engage with the inner tooth on the outside of the pitch circle formed with the inner tooth of the gear rim.
The method of claim 6,

And the outer edge of the lock gear additionally protrudes from the round end portion for reinforcement of the end portion, and engages with the inner tooth through the round end portion.
The method of claim 1,

The sector gear is a heat-treated steel,

The holder is a round carbon steel recliner, characterized in that the carbon steel is lower than the sector gear strength.