JP6111312B2 - Recliner shaft for vehicle seat - Google Patents

Description

  The present invention relates to a recliner shaft, and more particularly, to a recliner shaft for a vehicle seat that allows the backrest of the vehicle seat to be rotated and fixed at a constant angle.

  By installing a recliner on the seat on which the driver and passengers of the car sit, the angle of the backrest can be adjusted forward and backward with respect to the seat plate, the riding posture of the person riding the car is suitable for driving So that it can be kept in a fixed position or adjusted to any required angle.

  Such a recliner is installed on both sides where a cushion frame on which a seat plate is installed and a seat back frame on which a backrest is installed are hinged to each other, and the recliners on both sides are connected by a recliner shaft and interlocked.

  The passenger can operate the recliner by manually or automatically rotating the recliner shaft to adjust the angle of the backrest, but when the recliner shaft rotates, the backrest rotates forward and backward with respect to the seat plate.

  However, the conventional recliner shaft is made of a round bar material that is completely filled, and there is a problem that the weight is very heavy, which makes it impossible to respond to the trend of lighter vehicles and raises the overall manufacturing cost. It is a factor to make.

Korean Registered Patent No. 10-0627729

  The present invention has been devised to solve the above-described problems, and an object thereof is to provide a recliner shaft in the form of a hollow pipe having an empty inside.

  Another object of the present invention is to provide a recliner shaft that has a hollow inside, is light in weight, can reduce manufacturing costs, and can maintain sufficient torsional strength.

  The above-described object of the present invention is to place a first part that is spaced apart from each other and forms a part of a cylinder and the first part, and protrudes radially outward of the cylinder to form a protrusion. A vehicle including a first spline protrusion and a second spline protrusion, the second part having the same shape and being arranged symmetrically with respect to an imaginary straight line passing through the center of the cylinder. This can be achieved by providing a recliner shaft for the seat.

  According to a preferred feature of the present invention, it includes a third spline protrusion and a fourth spline protrusion disposed on the virtual straight line.

  According to another preferred aspect of the present invention, the third spline protrusion and the fourth spline protrusion are formed to have the same shape.

  According to still another preferred feature of the present invention, the third spline protrusion is formed to have the same shape as the first spline protrusion.

  According to still another preferred aspect of the present invention, the third spline protrusion and the first spline protrusion are spaced apart from each other along a circumferential direction of the cylinder by the fourth spline protrusion and the first spline. The protrusions are spaced apart at an angle greater than the certain angle along the circumferential direction of the cylinder.

  The length of the outer peripheral surface of the fourth spline protrusion may be greater than the length of the outer peripheral surface of the third spline protrusion.

  According to still another preferred feature of the present invention, the fourth spline protrusion has a predetermined curvature with a first curved surface portion inscribed in a virtual circle based on the center of the cylinder and a point outside the cylinder as a center of curvature. It includes a second curved surface part that has and bends.

  According to the recliner shaft for a vehicle seat according to the present invention, it is possible to help reduce the weight of the vehicle by providing a recliner shaft in the form of a hollow pipe having an empty space, and the manufacturing cost can be reduced.

  According to the recliner shaft for a vehicle seat according to the present invention, a hollow is formed inside, the weight is light and sufficient torsional strength is maintained, and the rotational force can be transmitted to the recliner.

It is a perspective view of the recliner shaft by one Embodiment of this invention. It is sectional drawing of the recliner shaft by one Embodiment of this invention. It is a perspective view of the recliner shaft by other one Embodiment of this invention. It is sectional drawing of the recliner shaft by other one Embodiment of this invention. FIG. 6 is a perspective view of a recliner shaft according to still another embodiment of the present invention. FIG. 6 is a cross-sectional view of a recliner shaft according to another embodiment of the present invention. It is the conceptual diagram which expanded the 4th spline protrusion shown in FIG. FIG. 2 is a view showing the use of a recliner shaft according to an embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiment described below is merely for explaining in detail to such an extent that a person having ordinary knowledge in the technical field to which the present invention belongs can easily carry out the invention. It does not mean to be limited. Also, in describing various embodiments of the present invention, like reference numerals are used for components having the same technical characteristics.

  FIG. 1 is a perspective view of a recliner shaft 100 according to an embodiment of the present invention.

  FIG. 2 is a cross-sectional view of a recliner shaft 100 according to an embodiment of the present invention.

  The recliner shaft 100 has a cylindrical shape including a plurality of protrusions protruding outward. Referring to FIG. 1, the recliner shaft 100 includes a first part I that forms a part of a cylindrical shape, and a second part II that connects between the first parts I.

  The first parts I are spaced apart from each other, and the recliner shaft 100 has a cylindrical shape formed so that the middle is cut off. The second part II is arranged between the first parts I and connects the first parts I. In addition, the second part II is formed so as to project from the cylindrical shape formed by the first part I in the outer side outward direction to form the spline protrusion 300.

  The second part II can transmit the rotational force on the spline groove of the recliner device 20. That is, the second part II has a spline protrusion 300 shape protruding outside the cylinder, and is formed so as to mesh with a spline groove (not shown) formed in the recliner device 20. When the recliner shaft 100 rotates, the second part II applied to the spline groove transmits torque to the recliner device 20 (see FIG. 8).

  Referring to FIG. 1, a plurality of spline protrusions 300 are formed apart from each other along the circumferential direction of the main body 200.

  The recliner shaft 100 has a shape in which a cross section of a specific shape is elongated in one direction. According to the illustrated drawing, the second part II and the first part I are extended while forming a straight line in the length direction of the shaft 100. In this drawing, the case where the end portions on both sides of the shaft 100 have the same shape is shown, but according to other embodiments, the end portions on both sides may have different shapes.

  A hollow is formed inside the recliner shaft 100. That is, the recliner shaft 100 is formed to have a pipe shape with a hole formed in the center.

The hollow inside the shaft 100 can have a specific shape. For example, the hollow central define the circle of virtual having a constant radius centered M ₁ to a reference body, to form a hollow protrusion part of the circumference of a virtual circle a is protruded to the outside it can.

  The hollow protrusion may have a virtual quadrilateral shape with curvature at the corners as shown in the drawing. According to another embodiment of the present invention, the protrusion may be formed to have a virtual circle, a semicircle, or an ellipse.

  Referring to FIG. 2, the recliner shaft 100 includes a plurality of spline protrusions 300. The spline protrusions 300 are spaced apart from each other along the circumferential direction of the main body 200. According to the drawing shown, the spline protrusions 300 are spaced apart by 90 °.

  Hereinafter, for convenience of explanation, the protrusion formed on the left side of the drawing is referred to as a first spline protrusion 301, and the protrusion formed on the right side of the drawing is referred to as a second spline protrusion 302.

  The protrusion formed on the lower side of the drawing is referred to as a third spline protrusion 303, and the protrusion formed on the upper side is referred to as a fourth spline protrusion 304.

According to the illustrated drawings, the first spline projections 301 and the second spline projections 302 are formed to be symmetrical to each other relative to the center M ₁ of the body, third spline protrusion 303 and the fourth spline projection 304 is symmetrical to each other It is formed to become.

  At this time, the first spline protrusion 301 and the second spline protrusion 302, the second spline protrusion 302 and the third spline protrusion 303, the third spline protrusion 303 and the fourth spline protrusion 304, the fourth spline protrusion 304 and the first spline protrusion 301. Are spaced apart from each other at the same 90 ° interval with respect to the center of the main body 200. According to the drawings, the first spline protrusion 301 and the second spline protrusion 302 have the same shape, and the third spline protrusion 303 and the fourth spline protrusion 304 have the same shape. The protrusions may have the same shape, or all the protrusions may have different shapes.

  For convenience of explanation, the recliner shaft 100 is divided into a first part I that forms a part of a cylinder and a second part II that connects the first part I.

  For example, a portion forming the main body 200 of the shaft 100 may be referred to as a first part I, and a portion where the spline protrusion 300 is formed may be referred to as a second part II.

  An inner peripheral surface connection portion and an outer peripheral surface connection portion are formed between the spline protrusion 300 and the main body 200.

  The inner peripheral surface connecting portion connects the inner peripheral surface 310 of the spline protrusion 300 and the inner peripheral surface 210 of the main body 200. The outer peripheral surface connecting portion connects the outer peripheral surface 320 of the spline protrusion 300 and the outer peripheral surface 220 of the main body 200.

According to the illustrated drawing, a curved surface portion 222 is formed at the end of the outer peripheral surface 320 of the spline protrusion 300. Curved portion 222 bends while having a predetermined curvature on the basis of the center of curvature M _2. An extended portion 224 that extends toward the outer peripheral surface 220 of the main body 200 is formed at one end of the curved surface portion 222. The curved surface portion 222 is formed by the spline protrusion 300 so as to occupy a thickness r.

The spline protrusion 300 is formed to have a certain inclination. For example, as shown in the drawing, both side surfaces of the ply projection 302 may be formed so as to be inclined so as to have a depression angle of θ ₁ .

As a specific embodiment of the present invention, when the diameter of the outer peripheral surface 220 of the main body 200 is 7.6, the diameter of the outer peripheral surface 320 of the spline protrusion 300 is 10.6. At this time, the width of the fourth spline protrusion 304 is 5.1, and the radius of the first curved surface portion is 0.5. The thickness r is 0.05 times the diameter of the outer peripheral surface 320 of the spline protrusion 300. The depression angle θ ₁ is 26 °.

  FIG. 3 is a perspective view of a recliner shaft according to another embodiment of the present invention.

  FIG. 4 is a cross-sectional view of a recliner shaft according to another embodiment of the present invention.

  Referring to FIG. 3, a plurality of spline protrusions 300 are formed apart from each other along the circumferential direction of the main body 200. At this time, at least one of the four spline protrusions may have a different shape. For example, as shown in the drawing, the upper protrusion can be formed larger than the other protrusions, or the lower protrusion can be formed smaller than the other protrusions.

  Similar to the recliner shaft shown in FIG. 1, the recliner shaft according to the present embodiment has a form in which a cross section having a specific shape is elongated in one direction. According to the illustrated drawing, the second part II and the first part I are extended while forming a straight line in the length direction of the shaft 100. In this drawing, the end portions on both sides of the shaft 100 are shown to have the same shape, but according to other embodiments, the end portions on both sides may have different shapes.

  A hollow is formed inside the recliner shaft 100. That is, the recliner shaft 100 is formed to have a pipe shape with a hole formed in the center.

The hollow inside the shaft 100 may have a specific shape. For example, the hollow central define the circle of virtual having a constant radius centered M ₁ to a reference body, to form a hollow protrusion part of the circumference of a virtual circle a is protruded to the outside it can.

  The hollow protrusion may have a virtual quadrilateral shape with curvature at the corners as shown in the drawing. According to another embodiment of the present invention, the protrusion may be formed to have a virtual circle, a semicircle, or an ellipse.

  According to this embodiment, any one of the four spline protrusions may have a different shape. That is, as shown in the drawing, the fourth spline protrusion 304 can be formed larger than the first to third spline protrusions. The length of the outer peripheral surface of the fourth spline protrusion 304 is formed larger than the length of the outer peripheral surface of the other spline protrusions.

Referring to FIG. 4, the angle θ ₂ between the first spline protrusion 301 and the third spline protrusion 303 is smaller than 90 °, and the angle between the first spline protrusion 301 and the fourth spline protrusion 304 is 90 °. Become bigger. That is, when the fourth spline protrusion 304 is formed larger than the other protrusions, the first spline protrusion 301 and the second spline protrusion 302 are slightly moved toward the third spline protrusion 303 side.

In this case, the first spline projections 301 and the second spline projection 302 is disposed a virtual straight line passing through the center M ₁ of the cylinder to be symmetrical to each other as a reference, the third spline projection 303 fourth spline projection 304 It is arranged on the virtual straight line. That is, the cross section of the shaft has a shape that is symmetric in the drawing.

  FIG. 5 is a perspective view of a recliner shaft according to still another embodiment of the present invention.

  Referring to FIG. 5, a plurality of spline protrusions 300 are formed apart from each other along the circumferential direction of the main body 200. At least one of the four spline protrusions may have a different shape. For example, the upper protrusion may be formed larger than the other protrusions, or the lower protrusion may be formed smaller than the other protrusions. At this time, as shown in the drawing, a groove recessed toward the inside of the main body may be formed in any one of the protrusions. FIG. 6 is a cross-sectional view of a recliner shaft according to another embodiment of the present invention, and FIG. 7 is an enlarged conceptual view of the fourth spline protrusion shown in FIG.

  FIG. 6 shows an embodiment in which the shape of the fourth spline protrusion 304 is modified in the embodiment shown in FIG.

Referring to FIGS. 6 and 7, the fourth spline protrusion 304 includes a groove recessed toward the center of the cylinder. More specifically, the outer peripheral surface 320 is cylindrical in the center M ₁ and a first curved portion 225 and an external one point M ₃ of a cylinder inscribed in an imaginary circle having its center point center of curvature as the predetermined fourth spline projection 304 A second curved surface portion 226 having a curvature is included.

A first extending portion 228 and a third curved surface portion 229 may be formed between the first curved surface portion 225 and the second curved surface portion 226. The first extension portion 228 forms a plane for connecting the second curved portion 226 and the third curved portion 229, a third curved portion 229 is formed to have a predetermined curvature as the center of curvature of a point M ₄ The The groove depth 227 may be formed such that the distance between the outer peripheral surface 320 and the inner peripheral surface 310 of the spline protrusion is the same as the thickness of the cylinder.

  As a specific embodiment of the present invention, when the diameter of the outer peripheral surface 320 of the fourth spline protrusion 304 is 10.6, the depth of the groove is 0.8 and the radius of the second curved surface portion 226 is 1. The radius of the third curved surface portion 229 is 0.5. In this case, the depression angle of the groove is 120 °.

  FIG. 8 is a usage diagram of a recliner shaft for a vehicle seat according to an embodiment of the present invention.

  The spline protrusion 300 formed on the outer peripheral surface of the recliner shaft 100 is engaged with a spline groove (not shown) of the recliner device 20, and serves to transmit the rotational force of the recliner shaft 100 to the recliner device 20. Since the spline protrusion 300 and the groove portion 400 are configured as described above, the recliner shaft 100 is formed in a hollow shape that can save weight and material cost compared to the conventional one, and has a strength that can prevent torsional deformation. .

  The recliner shaft for a vehicle seat according to at least one embodiment of the present invention configured as described above can help reduce the weight of the vehicle by providing a recliner shaft in the form of a hollow pipe with an empty interior, thereby reducing the manufacturing cost. There is an effect to save. Further, it can be expected to have an improved effect compared to a conventional shaft, for example, a hollow is formed inside, the weight is light, and sufficient torsional strength is maintained and rotational force can be transmitted to the recliner.

  Although the embodiments of the present invention have been described above, those skilled in the art to which the present invention pertains can understand that various modifications can be made without departing from the scope of the claims of the present invention. Can do.

100 recliner shaft 200 main body 210 inner peripheral surface 220 of main body outer peripheral surface 222 of main body curved surface portion 224 extension portion 225 first curved surface portion 226 second curved surface portion 228 first extension portion 229 third curved surface portion 301 first spline protrusion 302 second Spline protrusion 303 Third spline protrusion 304 Fourth spline protrusion 310 Spline protrusion inner peripheral surface 320 Spline protrusion outer peripheral surface I First part II Second part

Claims (5)

First parts that are spaced apart from one another and form part of a cylinder;
And by connecting between the first part protrudes in a radial outward direction of the cylindrical and a second part forming the protrusion,
The second part includes a first spline protrusion and a second spline protrusion arranged so as to be symmetrical with respect to an imaginary straight line passing through the center of the cylinder, and a third spline protrusion arranged on the imaginary straight line. and a fourth spline projections seen including,
The first spline protrusion and the second spline protrusion have the same shape, the third spline protrusion and the fourth spline protrusion have the same shape,
The recliner shaft for a vehicle seat , wherein the outer peripheral surfaces of the third spline protrusion and the fourth spline protrusion are formed longer than the outer peripheral surfaces of the first spline protrusion and the second spline protrusion . The first spline protrusion, the second spline protrusion, the third spline protrusion, and the fourth spline protrusion are spaced apart from each other by an interval of 90 °, and a curved surface portion is provided at the end of the outer peripheral surface of each spline protrusion. Formed,
  The recliner shaft for a vehicle seat according to claim 1, wherein both side surfaces of the first spline protrusion and the second spline protrusion are formed to be inclined.   First parts that are spaced apart from one another and form part of a cylinder;
  A second part that connects between the first parts and protrudes radially outward of the cylinder to form a protrusion;
The second part includes a first spline protrusion and a second spline protrusion arranged so as to be symmetrical with respect to an imaginary straight line passing through the center of the cylinder, and a third spline protrusion arranged on the imaginary straight line. And a fourth spline protrusion,
  The first spline protrusion, the second spline protrusion, and the third spline protrusion have the same shape,
  The recliner shaft for a vehicle seat, wherein the length of the outer peripheral surface of the fourth spline protrusion is formed to be greater than the length of the outer peripheral surface of each of the first spline protrusion, the second spline protrusion, and the third spline protrusion. . The third spline protrusion and the first spline projections are spaced apart a predetermined angle along the circumferential direction of the cylinder, said a fourth spline projections and first spline projections along the circumferential direction of the cylindrical The recliner shaft for a vehicle seat according to claim 3 , wherein the recliner shaft is disposed at an angle greater than the predetermined angle. It said fourth spline projection includes a second curved portion bent with a predetermined curvature a point of the first curved portion and the cylindrical external inscribed in an imaginary circle relative to the center of the cylindrical as the center of curvature The recliner shaft for a vehicle seat according to claim 4 .

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