KR101071946B1 - Recliner preventing back drive - Google Patents

Abstract

The recliner of the present invention has an action through a cam (3) and a pair of wedge blocks (4,5) rotating together with the socket (2) receiving the rotation of the shaft (shaft), and the inside of the gear teeth difference By adjusting the position of the engagement section of the gear 22 and the outer gear 23, the angle of the backrest of the seat is maintained and the fixed state is maintained, and the diameter of the cam 3 is rotated in the reverse rotation due to the load applied to the backrest. At the same time, a clutch spring 12, which forms a frictional force that prevents the cam 3 from rotating in reverse, is built into the cam 3, thereby fundamentally eliminating the back drive caused by unwanted operation of the cam 3. Preventing the angle adjustment of the seat can always be kept in place.

Spring, recliner, loosening

Description

Recliner preventing back drive

TECHNICAL FIELD The present invention relates to a recliner, and more particularly, to a recliner capable of preventing back drive due to repeated fatigue loads.

In general, seats, which are seat chairs installed in the front and rear of the interior of a vehicle, are equipped with various convenience devices for the passenger's comfort.

For example, the sliding function that can be pushed back and forth according to the passenger's body shape and the pull can be adjusted, the lifting function to move the seat up and down depending on the situation, as well as the inclination of the seat back (Seat Back) It is equipped with various convenience devices for implementing the function.

A device for adjusting the backrest at various angles among these various devices is generally called a recliner and is mounted as a portion where the seat cushion portion and the backrest are connected, and a manual operation type operated by a lever and an electric motor using power There is a type.

To explain the operation of the recliner as described above, the cam which receives the rotation of the socket through the lever or the motor external shaft is rotated together with the wedge block, and the rotation of the cam is a gear assembly having a gear tooth difference. Since the position of the engagement section is changed with respect to the Say, the angle of the backrest is implemented in such a manner as to be changed by the change of the engagement section.

The standstill after angle adjustment limits the cam's movement by keeping the wedge block open by the wedge spring, in which the gear assembly remains engaged to restrain the movement of the backrest.

However, since the backrest receives a repetitive load through the passenger, the recliner cannot but be subjected to the same load, and due to such a load condition, the recliner inevitably causes a repetitive fatigue load.

The fatigue load of the recliner as described above weakens the restraint force between the cam and the wedge block, resulting in a fine loosening (Back Drive). do.

This loosening between cam and wedge block makes it impossible to utilize manual recliner using lever, and if it is applied, it requires a separate device or means to prevent loosening between cam and wedge block. It has the disadvantage of causing change or cost increase.

Accordingly, the present invention has been invented in view of the above, and the cam back drive phenomenon is prevented by the friction force caused by the expansion of the clutch spring, so that the seat back angle of the seat is always maintained even when the fatigue load is accumulated. It is an object of the present invention to provide a recliner.

In addition, an object of the present invention is to provide a recliner that does not require additional means for the interlocking action by using the friction force of the clutch spring generating friction force, and that the clutch spring can be installed into a pre-formed inner space, so that no design change is necessary. .

The present invention for achieving the above object, the recliner is located inward of the cam (3) that rotates with the socket (2) coupled to the shaft (rotating) to rotate in the external operation, the cam (3) Wedge spring 11 for applying an elastic force to the wedge block to form a frictional force with;

A clutch spring 12 which expands the diameter to the pressing force due to the reverse rotation of the cam 3 in the seat back fixed state, and prevents the reverse drive of the cam 3 to prevent the back drive;

A cover bracket (30) contacting the enlarged clutch spring (12) to form a friction force for applying a restraining force to the cam (3);

Characterized in that configured to include.

The socket 2 has a shape in which the splined hole is bent and the front and rear portions are protruded, respectively, and the cam 3 is positioned upward, and the cam protrusion 3a of the cam 3 is protruded. A cutting edge (2a) is formed to be cut so that the ()) is positioned, and the extension blade (2b) is formed at the bottom to limit the open angle of the wedge block symmetrical to the rear.

The cutting end 2a of the socket 2 has a gap in which a cam protrusion 3a of the cam 3 is located, and a clearance gap can be formed in a state where both ends of the clutch spring 12 are located. Have

The cam protrusion 3a is formed at the center of the cam 3 having a semicircular cross-sectional shape.

The wedge block is composed of a pair of wedge blocks (4, 5) symmetrical left and right in the assembled state, the contact portion is formed in the fan-shaped inclined end (4a, 5a) to form the wedge spring (11) The parallelly bent end 11a is positioned.

The socket (2) and the cam (3) assembled with the wedge block therebetween are enclosed by an annular annular bush (6), and the bush (6) is received in the inner space of the guide ring (21) and the number of gear teeth The inner gear 22 with the difference is coupled to the outer gear 23 engaged inwardly.

The clutch spring 12 forms a friction force with the cover bracket 30 by using an outer diameter.

The clutch spring 12 has an annular annular shape in the form of a plate having a rectangular cross section, and is pressurized through a cam protrusion 3a protruding from a central portion of the cam 3 when the cam 3 is reversely rotated. To extend the, characterized in that it is provided with restraining ends (12a, 12b) bent downwards on both ends facing each other.

The cover bracket 30 forms a multi-stage cross section that widens the inner space, but forms a friction housing 30a in which the clutch spring 12 is accommodated in the inner space so that the clutch spring 12 in contact with the diameter thereof is extended. The friction housing 30a has a diameter smaller than the diameter of the clutch spring 12 that extends and protrudes the highest.

According to the present invention, since the clutch spring is installed into a pre-formed inner space that prevents the cam from loosening under repeated fatigue loads, it is not necessary to change the design of the recliner to prevent loosening. The effect is to further optimize the internal components to reduce the overall size.

In addition, the present invention can prevent the back drive (regardless of the electric power driven by the power or the manual recliner using the lever), and in particular, when applied to the manual recliner can provide a more stable stability to maximize the merchandise Has the effect.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Since the exemplary embodiments of the present invention may be embodied in various different forms, one of ordinary skill in the art to which the present invention pertains may be described herein. It is not limited to the Example to make.

Figure 1 shows an exploded perspective view of the release block type recliner according to the present invention, the recliner of the present invention is a cam unit (1) to rotate through the external force and to form a fixed force through the friction force, and the cam unit ( The spring unit 10 which provides elasticity to 1) and provides a friction force for blocking the back drive that moves the backrest of the seat, and the position of the engagement section due to the difference in the number of teeth when adjusting the angle of the backrest It comprises a gear unit 20 to be changed, and a cover bracket 30 forming an appearance and forming a frictional force to block the loosening phenomenon.

The recliner is a pair provided on each side of the sheet, the interlocking operation is made with each other via a shaft that rotates by an external operation.

The recliner as described above is configured to have various structures and operation methods, and in this embodiment, the recliner will be described in accordance with a rotary type recliner.

The cam unit 1 according to the present embodiment has a socket 2 splined to a shaft that rotates by an external operation, and a cam 3 that rotates together with the socket 2 surrounding the socket 2. And a pair of wedge blocks 4 and 5 positioned inward of the cam 3 so as to surround the socket 2 and forming a friction force with the cam 3, and the socket 2 and the cam. It consists of an annular ring type bush 6 which accommodates (3) inside.

The socket 2 has a spline-drilled hole and the front and rear portions are formed to protrude, respectively, and an incision end 2a formed by cutting an upper portion is formed in the front side, and has a fan shape in the lower portion in the rear portion. A protruding extension blade 2b is formed.

The cutting end 2a as described above has a predetermined angle at the forming angle a, and the forming angle a is a size at which the protruding portion of the cam 3 is accommodated to move left and right at a predetermined angle, and the extension blade The spread angle B of (2b) is smaller than the non-occupying angle A of the assembled pair of wedge blocks 4 and 5, as shown in Fig. 2 (b), so that the pair of wedge blocks 4 and 5 ) Provide space for open space.

In addition, the cam 3 protrudes toward the center portion of the cam protrusion 3a positioned toward the cut end 2a of the socket 2 in an assembled state, and as shown in FIG. A shape occupying the upper portion of the socket (2).

The cam protrusion 3a has a size having a formation angle b formed smaller than the formation angle a of the socket 2, which is the spring unit 10 in a state in which the socket 2 and the cam 3 are assembled. This is to have space to be located.

In addition, the wedge block (4, 5) has a shape forming a symmetrical left and right in the assembled state, the abutting portion is inclined upwardly inclined upward to have a fan-shaped inclined end (4a) is located , 5a).

As described above, the wedge blocks 4 and 5 form a non-occupancy angle A that is not in contact with the extension blade 2b of the socket 2 in the assembled state, as shown in FIG. 2 (b). The occupancy angle A is formed larger than the spread angle B of the extension blade 2b so that the pair of wedge blocks 4 and 5 are opened toward the extension blade 2b by the force of the spring unit 10. Provide space for

In addition, the spring unit 10 is composed of a spring for applying an elastic force during the operation of the recliner, and a pair of springs that perform different actions, such as a spring for preventing the recliner back drive after the operation.

The spring unit 10 according to the present embodiment is composed of a wedge spring 11 and a clutch spring 12 having different shapes.

The wedge spring 11 has an annular ring shape having a circular cross section and has a locking end 11a that is parallel to both ends facing each other, and the locking end 11a is an inclined end of the wedge blocks 4 and 5. 4a, 5a) is assembled to hang.

The clutch spring 12 has an annular annular shape in the form of a square cross section and has left and right restraint ends 12a and 12b which are bent at both ends facing each other downwardly. It has a forming angle c which is located in the space between the cutting edges 2a of 2) and the forming angles a and b of the cam protrusions 3a of the cam 3, which is the cam 3 when the loosening occurs after the backrest angle adjustment. This is to expand the diameter through) to form friction force.

The gear unit 20 according to the present embodiment has a guide ring 21 having an inner space, an inner gear 22 having a gear 22a formed along an edge thereof, and a space having entered therein, A gear 23a is formed along the outer gear 23 into which the inner gear 22 inserted is engaged.

The gears 22a and 23a formed on the inner gear 22 and the outer gear 23 have teeth different from each other, and the position of the engagement section is changed by the teeth teeth.

When the gear unit 20 adjusts the backrest angle, the outer gear 23 does not rotate while the inner gear 22 rotates, and the position of the engagement section is changed by the number of teeth of the gears 22a and 23a. With this change in position, the angle of the backrest is adjusted.

The cover bracket 30 according to the present embodiment protects the inside of the recliner and forms a friction force with the clutch spring 12 when the loosening phenomenon occurs after adjusting the backrest angle, thereby preventing the loosening phenomenon. .

To this end, the cover bracket 30 forms a multi-stage cross section that widens the inner space, but the clutch spring 12 is accommodated into the inner space to form a friction housing 30a as a central portion contacting each other when the diameter is expanded. The housing 30a protrudes highest with a diameter slightly larger than the diameter of the unexpanded clutch spring 12.

The friction housing 30a is formed to have a diameter smaller than the diameter of the expanding clutch spring 12, and in the assembled state, the clutch spring 12 occupies the space inside the friction housing 30a, which is the clutch spring. (12) is due to the plate shape having a non-circular cross section and having a certain height.

As described above, the recliner according to the present exemplary embodiment has a function of fundamentally preventing back drive by using the clutch spring 12 which prevents the cam 3 from rotating in reverse.

The clutch spring 12 is positioned so that the cam 3 can press on the cam 3 rotating with the socket 2 coupled to an externally operated shaft to realize the above characteristics. When the diameter is expanded, the cover bracket 30 coupled to cover the inside is assembled to form a friction force.

Fig. 2 (a) is an assembled cross sectional view of the recliner, with the recliner centered on a splined hollow socket 2 coupled to the shaft, the lower part of the socket 2 being guide ring ( An inner gear 22 having a different number of teeth and an engagement gear and an outer gear 23 coupled to 21 is assembled, and the upper portion of the socket 2 has a pair of wedge springs 11 having different functions. ) And the cover springs (30) are assembled by assembling the clutch spring (12).

In the assembled state, the outer gear 23 forms a wide space in a state where the hub coupling portion of the inner gear 22 is positioned, and the cam 3, the wedge blocks 4, 5, and the bush ( 6) has a structure assembled sequentially.

As can be seen in FIG. 2 (b), the cam 3 is located in the half of the socket 2 inside the bush 6 fitted in the center of the outer gear 23, and the cam ( Place a pair of wedge blocks (4, 5) into the inner space of 3).

At this time, the wedge block (4, 5) is subjected to the force applied by the wedge spring 11 is caught on the inclined end (4a, 5a), this wedge spring 11 is a guide ring at the upper portion of the socket (2) Assembled in the inner space of the cover bracket 30 fitted to the (21).

As a result, when the socket 2 is rotated, the extension blade 2b of the socket 2 exerts a force on the wedge blocks 4 and 5 to rotate the cam 3 and simultaneously to the socket 2. The combined inner gear 22 is rotated, and the rotation of the inner gear 22 changes the gear engagement section with respect to the outer gear 23 to adjust the backrest angle of the seat.

This action is a typical operational implementation of the rotary type recliner according to the present embodiment.

When the recliner is operated as described above and the seat back angle adjustment of the seat is completed, the engagement force between the inner gear 22 and the outer gear 23 and the wedge blocks 4 and 5 and the cam for the socket 2 Since the frictional force held by (3) is converted into a force restraining the movement of the backrest, the seat keeps the backrest angled.

However, the recliner accumulates the fatigue load due to the load repeatedly applied to the backrest, which causes the backrest to flow due to the fixed state of the backrest not being maintained.

To prevent this, the recliner according to the present embodiment includes a clutch spring 12 interlocked with the cam 3 to an inner space of the cover bracket 30, and the clutch spring 12 includes a cover bracket 30. Contact with and form a frictional force.

3 (a) shows a state in which the clutch spring 12 is assembled, and thus the clutch spring 12 surrounds the shaft-coupled socket 2 and both ends thereof are positioned toward the cam 3, and the cover Assembled in a state occupying the inside of the space of the friction housing 30a protruding from the central portion of the bracket (30).

In the assembled state, the restraint end 12a of the clutch spring 12 has a space between the cut end 2a of the socket 2 and the forming angles a and b of the cam protrusion 3a of the cam 3. Has a status of.

Figure 3 (b) shows the operating state of the clutch spring 12 in accordance with the loosening (Back Drive) of the recliner.

When the reverse rotation of the cam 3 causing the back drive occurs, the cam protrusion 3a of the cam 3 exerts a force Fa on one of the restraints 12b of the clutch spring 12, The constrained end 12b is pushed by X through the force Fa, increasing the diameter size by Y.

As described above, the clutch spring 12 having the increased diameter is in close contact with the inner surface of the inner space of the friction housing 30a of the cover bracket 30, and the close contact is between the clutch spring 12 and the cover bracket 30. A frictional force is formed, which in turn forms a reaction force applied to the cam 3.

At this time, the reaction force applied by the clutch spring 12 to the cam 3 increases proportionally as the force Fa applied by the cam 3 increases, so that the clutch spring 12 can further strengthen the restraint of the cam 3. .

As a result, the cam 3, which is subjected to the reaction force applied by the clutch spring 12, is converted into a strong restraint state in which the reverse rotation does not proceed any more and stops, and the back drive is prevented by the restraint of the cam 3. As it is blocked, the seat is prevented from generating flow due to the recliner.

As described above, the recliner according to the present embodiment extends the diameter when the cam 3 rotates backward due to the load applied to the backrest, and simultaneously forms a friction force that prevents the cam 3 from proceeding reverse rotation. Since the cam 3 is built into the cam portion, since the back drive due to unwanted operation of the cam 3 is essentially prevented, the angle adjustment state of the seat is always kept in the correct position, so that there is no inconvenience for passengers. Merchandise can also be improved.

1 is an exploded perspective view of the release blocking type recliner according to the present invention

Figure 2 (a), (b) is an assembled cross-sectional view of the recliner according to the present invention

3 (a), (b) is an operation of the clutch spring according to the present invention

    <Description of the symbols for the main parts of the drawings>

1: Cam unit 2: Socket

2a: incision 2b: extension wing

3: cam 3a: cam protrusion

4,5: Wedge Block

4a, 5a: inclined end 6: bush

10: spring unit 11: wedge spring

11a: end 12: clutch spring

12a: restraint stage 20: gear unit

21: guide ring 22: inner gear

22a, 23a: gear 23: outer gear

30: cover bracket 30a: friction housing

a, b, c: forming angle

Claims (10)

delete The splined hole is bent and the front and rear parts are formed to protrude, respectively, and the incision is formed by cutting the cam so that the cam is located above and the protruding cam protrusion of the cam is located on the front. A socket having an extended wing at the bottom thereof to limit the open angle of the symmetrical wedge block; A wedge spring positioned inwardly of the rotating cam with the socket coupled to the rotating shaft by an external operation to apply an elastic force to the wedge block forming friction with the cam; Clutch spring that expands the diameter with the pressing force by reverse rotation of the cam while fixing the backrest of the seat to form friction force with the inner surface of the cover bracket to apply a restraining force to the cam side, and prevent the cam from rotating backward ; Release block type recliner, characterized in that configured to include. The release block type recliner of claim 2, wherein the cut end of the socket is an interval capable of forming a clearance gap in a state where the cam protrusion of the cam is positioned and both ends of the clutch spring are positioned. The release block type recliner of claim 3, wherein the cam protrusion is formed at the center of the cam having a semicircular cross-sectional shape. The wedge block according to claim 2, wherein the wedge block is composed of a pair of wedge blocks having symmetrical left and right sides in an assembled state, and abutting portions thereof form an inclined end cut in a fan shape to parallelly bend the end of the wedge spring. The release blocking type recliner of which is located. The method of claim 2, wherein the socket and the cam assembled between the wedge block is enclosed by an annular ring-type bush, the bush is received into the inner space of the guide ring and the inner gears having a gear tooth difference with each other is engaged inwardly. A release blocking type recliner, characterized in that coupled to the outer gear. delete The method of claim 2, wherein the clutch spring is formed in an annular annular shape in the form of a plate of a rectangular cross-section, facing each other, so as to expand the diameter by pressing through the cam projection protruding from the center portion of the cam when the cam is rotated back An unblocking recliner, characterized in that it has a constrained end that is bent at both ends downward. The release bracket according to claim 2, wherein the cover bracket forms a multi-stage cross section that enlarges an inner space, and the clutch spring is accommodated as an inner space, and a friction housing is formed as a central portion to which the clutch spring which is extended in diameter is contacted. Type Recliner. The release block type recliner of claim 9, wherein the friction housing has a diameter smaller than a diameter of the clutch spring that extends and protrudes the highest.

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